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/* $Header$ */
|
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|
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/*
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* tkImgPhoto.c --
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*
|
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* Implements images of type "photo" for Tk. Photo images are
|
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* stored in full color (32 bits per pixel) and displayed using
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* dithering if necessary.
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*
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* Copyright (c) 1994 The Australian National University.
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* Copyright (c) 1994-1997 Sun Microsystems, Inc.
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*
|
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* See the file "license.terms" for information on usage and redistribution
|
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* Author: Paul Mackerras (paulus@cs.anu.edu.au),
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* Department of Computer Science,
|
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* Australian National University.
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*
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* RCS: @(#) $Id: tkimgphoto.c,v 1.1.1.1 2001/06/13 05:03:26 dtashley Exp $
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*/
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#include "tkInt.h"
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#include "tkPort.h"
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#include "tclMath.h"
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26 |
#include <ctype.h>
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27 |
|
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#ifdef __WIN32__
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#include "tkWinInt.h"
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#endif
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|
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/*
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* Declaration for internal Xlib function used here:
|
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*/
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35 |
|
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extern int _XInitImageFuncPtrs _ANSI_ARGS_((XImage *image));
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|
38 |
/*
|
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* A signed 8-bit integral type. If chars are unsigned and the compiler
|
40 |
* isn't an ANSI one, then we have to use short instead (which wastes
|
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* space) to get signed behavior.
|
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*/
|
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#if defined(__STDC__) || defined(_AIX)
|
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typedef signed char schar;
|
46 |
#else
|
47 |
# ifndef __CHAR_UNSIGNED__
|
48 |
typedef char schar;
|
49 |
# else
|
50 |
typedef short schar;
|
51 |
# endif
|
52 |
#endif
|
53 |
|
54 |
/*
|
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* An unsigned 32-bit integral type, used for pixel values.
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* We use int rather than long here to accommodate those systems
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* where longs are 64 bits.
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*/
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typedef unsigned int pixel;
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61 |
|
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/*
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* The maximum number of pixels to transmit to the server in a
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* single XPutImage call.
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*/
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#define MAX_PIXELS 65536
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/*
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* The set of colors required to display a photo image in a window depends on:
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* - the visual used by the window
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* - the palette, which specifies how many levels of each primary
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* color to use, and
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* - the gamma value for the image.
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*
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* Pixel values allocated for specific colors are valid only for the
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* colormap in which they were allocated. Sets of pixel values
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* allocated for displaying photos are re-used in other windows if
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* possible, that is, if the display, colormap, palette and gamma
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* values match. A hash table is used to locate these sets of pixel
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* values, using the following data structure as key:
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*/
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|
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typedef struct {
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Display *display; /* Qualifies the colormap resource ID */
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Colormap colormap; /* Colormap that the windows are using. */
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double gamma; /* Gamma exponent value for images. */
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Tk_Uid palette; /* Specifies how many shades of each primary
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* we want to allocate. */
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} ColorTableId;
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|
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/*
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* For a particular (display, colormap, palette, gamma) combination,
|
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* a data structure of the following type is used to store the allocated
|
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* pixel values and other information:
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*/
|
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typedef struct ColorTable {
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ColorTableId id; /* Information used in selecting this
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* color table. */
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int flags; /* See below. */
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int refCount; /* Number of instances using this map. */
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int liveRefCount; /* Number of instances which are actually
|
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* in use, using this map. */
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int numColors; /* Number of colors allocated for this map. */
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XVisualInfo visualInfo; /* Information about the visual for windows
|
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* using this color table. */
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pixel redValues[256]; /* Maps 8-bit values of red intensity
|
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* to a pixel value or index in pixelMap. */
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pixel greenValues[256]; /* Ditto for green intensity */
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pixel blueValues[256]; /* Ditto for blue intensity */
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unsigned long *pixelMap; /* Actual pixel values allocated. */
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unsigned char colorQuant[3][256];
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/* Maps 8-bit intensities to quantized
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* intensities. The first index is 0 for
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* red, 1 for green, 2 for blue. */
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} ColorTable;
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/*
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* Bit definitions for the flags field of a ColorTable.
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* BLACK_AND_WHITE: 1 means only black and white colors are
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* available.
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* COLOR_WINDOW: 1 means a full 3-D color cube has been
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* allocated.
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* DISPOSE_PENDING: 1 means a call to DisposeColorTable has
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* been scheduled as an idle handler, but it
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* hasn't been invoked yet.
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* MAP_COLORS: 1 means pixel values should be mapped
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* through pixelMap.
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*/
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#ifdef COLOR_WINDOW
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#undef COLOR_WINDOW
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#endif
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#define BLACK_AND_WHITE 1
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#define COLOR_WINDOW 2
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#define DISPOSE_PENDING 4
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#define MAP_COLORS 8
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/*
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* Definition of the data associated with each photo image master.
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*/
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typedef struct PhotoMaster {
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Tk_ImageMaster tkMaster; /* Tk's token for image master. NULL means
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* the image is being deleted. */
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Tcl_Interp *interp; /* Interpreter associated with the
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* application using this image. */
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Tcl_Command imageCmd; /* Token for image command (used to delete
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* it when the image goes away). NULL means
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* the image command has already been
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* deleted. */
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int flags; /* Sundry flags, defined below. */
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int width, height; /* Dimensions of image. */
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int userWidth, userHeight; /* User-declared image dimensions. */
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Tk_Uid palette; /* User-specified default palette for
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* instances of this image. */
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double gamma; /* Display gamma value to correct for. */
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char *fileString; /* Name of file to read into image. */
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Tcl_Obj *dataString; /* Object to use as contents of image. */
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Tcl_Obj *format; /* User-specified format of data in image
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* file or string value. */
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unsigned char *pix24; /* Local storage for 24-bit image. */
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int ditherX, ditherY; /* Location of first incorrectly
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* dithered pixel in image. */
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TkRegion validRegion; /* Tk region indicating which parts of
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* the image have valid image data. */
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struct PhotoInstance *instancePtr;
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/* First in the list of instances
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* associated with this master. */
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} PhotoMaster;
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/*
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* Bit definitions for the flags field of a PhotoMaster.
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* COLOR_IMAGE: 1 means that the image has different color
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* components.
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* IMAGE_CHANGED: 1 means that the instances of this image
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* need to be redithered.
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*/
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#define COLOR_IMAGE 1
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#define IMAGE_CHANGED 2
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/*
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* The following data structure represents all of the instances of
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* a photo image in windows on a given screen that are using the
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* same colormap.
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*/
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typedef struct PhotoInstance {
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PhotoMaster *masterPtr; /* Pointer to master for image. */
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Display *display; /* Display for windows using this instance. */
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Colormap colormap; /* The image may only be used in windows with
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* this particular colormap. */
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struct PhotoInstance *nextPtr;
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/* Pointer to the next instance in the list
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* of instances associated with this master. */
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int refCount; /* Number of instances using this structure. */
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Tk_Uid palette; /* Palette for these particular instances. */
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double gamma; /* Gamma value for these instances. */
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Tk_Uid defaultPalette; /* Default palette to use if a palette
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* is not specified for the master. */
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ColorTable *colorTablePtr; /* Pointer to information about colors
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* allocated for image display in windows
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* like this one. */
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Pixmap pixels; /* X pixmap containing dithered image. */
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int width, height; /* Dimensions of the pixmap. */
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schar *error; /* Error image, used in dithering. */
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XImage *imagePtr; /* Image structure for converted pixels. */
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XVisualInfo visualInfo; /* Information about the visual that these
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* windows are using. */
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GC gc; /* Graphics context for writing images
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* to the pixmap. */
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} PhotoInstance;
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/*
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* The following data structure is used to return information
|
221 |
* from ParseSubcommandOptions:
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*/
|
223 |
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224 |
struct SubcommandOptions {
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225 |
int options; /* Individual bits indicate which
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* options were specified - see below. */
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Tcl_Obj *name; /* Name specified without an option. */
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int fromX, fromY; /* Values specified for -from option. */
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int fromX2, fromY2; /* Second coordinate pair for -from option. */
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int toX, toY; /* Values specified for -to option. */
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int toX2, toY2; /* Second coordinate pair for -to option. */
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int zoomX, zoomY; /* Values specified for -zoom option. */
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int subsampleX, subsampleY; /* Values specified for -subsample option. */
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Tcl_Obj *format; /* Value specified for -format option. */
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XColor *background; /* Value specified for -background option. */
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};
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237 |
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238 |
/*
|
239 |
* Bit definitions for use with ParseSubcommandOptions:
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240 |
* Each bit is set in the allowedOptions parameter on a call to
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241 |
* ParseSubcommandOptions if that option is allowed for the current
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242 |
* photo image subcommand. On return, the bit is set in the options
|
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* field of the SubcommandOptions structure if that option was specified.
|
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*
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* OPT_BACKGROUND: Set if -format option allowed/specified.
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* OPT_FORMAT: Set if -format option allowed/specified.
|
247 |
* OPT_FROM: Set if -from option allowed/specified.
|
248 |
* OPT_GRAYSCALE: Set if -grayscale option allowed/specified.
|
249 |
* OPT_SHRINK: Set if -shrink option allowed/specified.
|
250 |
* OPT_SUBSAMPLE: Set if -subsample option allowed/spec'd.
|
251 |
* OPT_TO: Set if -to option allowed/specified.
|
252 |
* OPT_ZOOM: Set if -zoom option allowed/specified.
|
253 |
*/
|
254 |
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255 |
#define OPT_BACKGROUND 1
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256 |
#define OPT_FORMAT 2
|
257 |
#define OPT_FROM 4
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258 |
#define OPT_GRAYSCALE 8
|
259 |
#define OPT_SHRINK 0x10
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260 |
#define OPT_SUBSAMPLE 0x20
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261 |
#define OPT_TO 0x40
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262 |
#define OPT_ZOOM 0x80
|
263 |
|
264 |
/*
|
265 |
* List of option names. The order here must match the order of
|
266 |
* declarations of the OPT_* constants above.
|
267 |
*/
|
268 |
|
269 |
static char *optionNames[] = {
|
270 |
"-background",
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271 |
"-format",
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272 |
"-from",
|
273 |
"-grayscale",
|
274 |
"-shrink",
|
275 |
"-subsample",
|
276 |
"-to",
|
277 |
"-zoom",
|
278 |
(char *) NULL
|
279 |
};
|
280 |
|
281 |
/*
|
282 |
* The type record for photo images:
|
283 |
*/
|
284 |
|
285 |
static int ImgPhotoCreate _ANSI_ARGS_((Tcl_Interp *interp,
|
286 |
char *name, int objc, Tcl_Obj *CONST objv[],
|
287 |
Tk_ImageType *typePtr, Tk_ImageMaster master,
|
288 |
ClientData *clientDataPtr));
|
289 |
static ClientData ImgPhotoGet _ANSI_ARGS_((Tk_Window tkwin,
|
290 |
ClientData clientData));
|
291 |
static void ImgPhotoDisplay _ANSI_ARGS_((ClientData clientData,
|
292 |
Display *display, Drawable drawable,
|
293 |
int imageX, int imageY, int width, int height,
|
294 |
int drawableX, int drawableY));
|
295 |
static void ImgPhotoFree _ANSI_ARGS_((ClientData clientData,
|
296 |
Display *display));
|
297 |
static void ImgPhotoDelete _ANSI_ARGS_((ClientData clientData));
|
298 |
static int ImgPhotoPostscript _ANSI_ARGS_((ClientData clientData,
|
299 |
Tcl_Interp *interp, Tk_Window tkwin,
|
300 |
Tk_PostscriptInfo psInfo, int x, int y, int width,
|
301 |
int height, int prepass));
|
302 |
|
303 |
Tk_ImageType tkPhotoImageType = {
|
304 |
"photo", /* name */
|
305 |
ImgPhotoCreate, /* createProc */
|
306 |
ImgPhotoGet, /* getProc */
|
307 |
ImgPhotoDisplay, /* displayProc */
|
308 |
ImgPhotoFree, /* freeProc */
|
309 |
ImgPhotoDelete, /* deleteProc */
|
310 |
ImgPhotoPostscript, /* postscriptProc */
|
311 |
(Tk_ImageType *) NULL /* nextPtr */
|
312 |
};
|
313 |
|
314 |
typedef struct ThreadSpecificData {
|
315 |
Tk_PhotoImageFormat *formatList; /* Pointer to the first in the
|
316 |
* list of known photo image formats.*/
|
317 |
Tk_PhotoImageFormat *oldFormatList; /* Pointer to the first in the
|
318 |
* list of known photo image formats.*/
|
319 |
} ThreadSpecificData;
|
320 |
static Tcl_ThreadDataKey dataKey;
|
321 |
|
322 |
/*
|
323 |
* Default configuration
|
324 |
*/
|
325 |
|
326 |
#define DEF_PHOTO_GAMMA "1"
|
327 |
#define DEF_PHOTO_HEIGHT "0"
|
328 |
#define DEF_PHOTO_PALETTE ""
|
329 |
#define DEF_PHOTO_WIDTH "0"
|
330 |
|
331 |
/*
|
332 |
* Information used for parsing configuration specifications:
|
333 |
*/
|
334 |
static Tk_ConfigSpec configSpecs[] = {
|
335 |
{TK_CONFIG_STRING, "-file", (char *) NULL, (char *) NULL,
|
336 |
(char *) NULL, Tk_Offset(PhotoMaster, fileString), TK_CONFIG_NULL_OK},
|
337 |
{TK_CONFIG_DOUBLE, "-gamma", (char *) NULL, (char *) NULL,
|
338 |
DEF_PHOTO_GAMMA, Tk_Offset(PhotoMaster, gamma), 0},
|
339 |
{TK_CONFIG_INT, "-height", (char *) NULL, (char *) NULL,
|
340 |
DEF_PHOTO_HEIGHT, Tk_Offset(PhotoMaster, userHeight), 0},
|
341 |
{TK_CONFIG_UID, "-palette", (char *) NULL, (char *) NULL,
|
342 |
DEF_PHOTO_PALETTE, Tk_Offset(PhotoMaster, palette), 0},
|
343 |
{TK_CONFIG_INT, "-width", (char *) NULL, (char *) NULL,
|
344 |
DEF_PHOTO_WIDTH, Tk_Offset(PhotoMaster, userWidth), 0},
|
345 |
{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
|
346 |
(char *) NULL, 0, 0}
|
347 |
};
|
348 |
|
349 |
/*
|
350 |
* Hash table used to hash from (display, colormap, palette, gamma)
|
351 |
* to ColorTable address.
|
352 |
*/
|
353 |
|
354 |
static Tcl_HashTable imgPhotoColorHash;
|
355 |
static int imgPhotoColorHashInitialized;
|
356 |
#define N_COLOR_HASH (sizeof(ColorTableId) / sizeof(int))
|
357 |
|
358 |
/*
|
359 |
* Forward declarations
|
360 |
*/
|
361 |
|
362 |
static int ImgPhotoCmd _ANSI_ARGS_((ClientData clientData,
|
363 |
Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
|
364 |
static int ParseSubcommandOptions _ANSI_ARGS_((
|
365 |
struct SubcommandOptions *optPtr,
|
366 |
Tcl_Interp *interp, int allowedOptions,
|
367 |
int *indexPtr, int objc, Tcl_Obj *CONST objv[]));
|
368 |
static void ImgPhotoCmdDeletedProc _ANSI_ARGS_((
|
369 |
ClientData clientData));
|
370 |
static int ImgPhotoConfigureMaster _ANSI_ARGS_((
|
371 |
Tcl_Interp *interp, PhotoMaster *masterPtr,
|
372 |
int objc, Tcl_Obj *CONST objv[], int flags));
|
373 |
static void ImgPhotoConfigureInstance _ANSI_ARGS_((
|
374 |
PhotoInstance *instancePtr));
|
375 |
static void ImgPhotoSetSize _ANSI_ARGS_((PhotoMaster *masterPtr,
|
376 |
int width, int height));
|
377 |
static void ImgPhotoInstanceSetSize _ANSI_ARGS_((
|
378 |
PhotoInstance *instancePtr));
|
379 |
static int ImgStringWrite _ANSI_ARGS_((Tcl_Interp *interp,
|
380 |
Tcl_Obj *formatString,
|
381 |
Tk_PhotoImageBlock *blockPtr));
|
382 |
static char * ImgGetPhoto _ANSI_ARGS_((PhotoMaster *masterPtr,
|
383 |
Tk_PhotoImageBlock *blockPtr,
|
384 |
struct SubcommandOptions *optPtr));
|
385 |
static int IsValidPalette _ANSI_ARGS_((PhotoInstance *instancePtr,
|
386 |
char *palette));
|
387 |
static int CountBits _ANSI_ARGS_((pixel mask));
|
388 |
static void GetColorTable _ANSI_ARGS_((PhotoInstance *instancePtr));
|
389 |
static void FreeColorTable _ANSI_ARGS_((ColorTable *colorPtr,
|
390 |
int force));
|
391 |
static void AllocateColors _ANSI_ARGS_((ColorTable *colorPtr));
|
392 |
static void DisposeColorTable _ANSI_ARGS_((ClientData clientData));
|
393 |
static void DisposeInstance _ANSI_ARGS_((ClientData clientData));
|
394 |
static int ReclaimColors _ANSI_ARGS_((ColorTableId *id,
|
395 |
int numColors));
|
396 |
static int MatchFileFormat _ANSI_ARGS_((Tcl_Interp *interp,
|
397 |
Tcl_Channel chan, char *fileName, Tcl_Obj *formatString,
|
398 |
Tk_PhotoImageFormat **imageFormatPtr,
|
399 |
int *widthPtr, int *heightPtr, int *oldformat));
|
400 |
static int MatchStringFormat _ANSI_ARGS_((Tcl_Interp *interp,
|
401 |
Tcl_Obj *data, Tcl_Obj *formatString,
|
402 |
Tk_PhotoImageFormat **imageFormatPtr,
|
403 |
int *widthPtr, int *heightPtr, int *oldformat));
|
404 |
static Tcl_ObjCmdProc * PhotoOptionFind _ANSI_ARGS_((Tcl_Interp * interp,
|
405 |
Tcl_Obj *obj));
|
406 |
static void DitherInstance _ANSI_ARGS_((PhotoInstance *instancePtr,
|
407 |
int x, int y, int width, int height));
|
408 |
static void PhotoOptionCleanupProc _ANSI_ARGS_((
|
409 |
ClientData clientData, Tcl_Interp *interp));
|
410 |
|
411 |
#undef MIN
|
412 |
#define MIN(a, b) ((a) < (b)? (a): (b))
|
413 |
#undef MAX
|
414 |
#define MAX(a, b) ((a) > (b)? (a): (b))
|
415 |
|
416 |
/*
|
417 |
*----------------------------------------------------------------------
|
418 |
*
|
419 |
* Tk_CreateOldPhotoImageFormat, Tk_CreatePhotoImageFormat --
|
420 |
*
|
421 |
* This procedure is invoked by an image file handler to register
|
422 |
* a new photo image format and the procedures that handle the
|
423 |
* new format. The procedure is typically invoked during
|
424 |
* Tcl_AppInit.
|
425 |
*
|
426 |
* Results:
|
427 |
* None.
|
428 |
*
|
429 |
* Side effects:
|
430 |
* The new image file format is entered into a table used in the
|
431 |
* photo image "read" and "write" subcommands.
|
432 |
*
|
433 |
*----------------------------------------------------------------------
|
434 |
*/
|
435 |
void
|
436 |
Tk_CreateOldPhotoImageFormat(formatPtr)
|
437 |
Tk_PhotoImageFormat *formatPtr;
|
438 |
/* Structure describing the format. All of
|
439 |
* the fields except "nextPtr" must be filled
|
440 |
* in by caller. Must not have been passed
|
441 |
* to Tk_CreatePhotoImageFormat previously. */
|
442 |
{
|
443 |
Tk_PhotoImageFormat *copyPtr;
|
444 |
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
|
445 |
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
|
446 |
|
447 |
copyPtr = (Tk_PhotoImageFormat *) ckalloc(sizeof(Tk_PhotoImageFormat));
|
448 |
*copyPtr = *formatPtr;
|
449 |
copyPtr->name = (char *) ckalloc((unsigned) (strlen(formatPtr->name) + 1));
|
450 |
strcpy(copyPtr->name, formatPtr->name);
|
451 |
copyPtr->nextPtr = tsdPtr->oldFormatList;
|
452 |
tsdPtr->oldFormatList = copyPtr;
|
453 |
}
|
454 |
|
455 |
void
|
456 |
Tk_CreatePhotoImageFormat(formatPtr)
|
457 |
Tk_PhotoImageFormat *formatPtr;
|
458 |
/* Structure describing the format. All of
|
459 |
* the fields except "nextPtr" must be filled
|
460 |
* in by caller. Must not have been passed
|
461 |
* to Tk_CreatePhotoImageFormat previously. */
|
462 |
{
|
463 |
Tk_PhotoImageFormat *copyPtr;
|
464 |
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
|
465 |
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
|
466 |
|
467 |
copyPtr = (Tk_PhotoImageFormat *) ckalloc(sizeof(Tk_PhotoImageFormat));
|
468 |
*copyPtr = *formatPtr;
|
469 |
copyPtr->name = (char *) ckalloc((unsigned) (strlen(formatPtr->name) + 1));
|
470 |
strcpy(copyPtr->name, formatPtr->name);
|
471 |
if (isupper((unsigned char) *formatPtr->name)) {
|
472 |
copyPtr->nextPtr = tsdPtr->oldFormatList;
|
473 |
tsdPtr->oldFormatList = copyPtr;
|
474 |
} else {
|
475 |
copyPtr->nextPtr = tsdPtr->formatList;
|
476 |
tsdPtr->formatList = copyPtr;
|
477 |
}
|
478 |
}
|
479 |
|
480 |
/*
|
481 |
*----------------------------------------------------------------------
|
482 |
*
|
483 |
* ImgPhotoCreate --
|
484 |
*
|
485 |
* This procedure is called by the Tk image code to create
|
486 |
* a new photo image.
|
487 |
*
|
488 |
* Results:
|
489 |
* A standard Tcl result.
|
490 |
*
|
491 |
* Side effects:
|
492 |
* The data structure for a new photo image is allocated and
|
493 |
* initialized.
|
494 |
*
|
495 |
*----------------------------------------------------------------------
|
496 |
*/
|
497 |
|
498 |
static int
|
499 |
ImgPhotoCreate(interp, name, objc, objv, typePtr, master, clientDataPtr)
|
500 |
Tcl_Interp *interp; /* Interpreter for application containing
|
501 |
* image. */
|
502 |
char *name; /* Name to use for image. */
|
503 |
int objc; /* Number of arguments. */
|
504 |
Tcl_Obj *CONST objv[]; /* Argument objects for options (doesn't
|
505 |
* include image name or type). */
|
506 |
Tk_ImageType *typePtr; /* Pointer to our type record (not used). */
|
507 |
Tk_ImageMaster master; /* Token for image, to be used by us in
|
508 |
* later callbacks. */
|
509 |
ClientData *clientDataPtr; /* Store manager's token for image here;
|
510 |
* it will be returned in later callbacks. */
|
511 |
{
|
512 |
PhotoMaster *masterPtr;
|
513 |
|
514 |
/*
|
515 |
* Allocate and initialize the photo image master record.
|
516 |
*/
|
517 |
|
518 |
masterPtr = (PhotoMaster *) ckalloc(sizeof(PhotoMaster));
|
519 |
memset((void *) masterPtr, 0, sizeof(PhotoMaster));
|
520 |
masterPtr->tkMaster = master;
|
521 |
masterPtr->interp = interp;
|
522 |
masterPtr->imageCmd = Tcl_CreateObjCommand(interp, name, ImgPhotoCmd,
|
523 |
(ClientData) masterPtr, ImgPhotoCmdDeletedProc);
|
524 |
masterPtr->palette = NULL;
|
525 |
masterPtr->pix24 = NULL;
|
526 |
masterPtr->instancePtr = NULL;
|
527 |
masterPtr->validRegion = TkCreateRegion();
|
528 |
|
529 |
/*
|
530 |
* Process configuration options given in the image create command.
|
531 |
*/
|
532 |
|
533 |
if (ImgPhotoConfigureMaster(interp, masterPtr, objc, objv, 0) != TCL_OK) {
|
534 |
ImgPhotoDelete((ClientData) masterPtr);
|
535 |
return TCL_ERROR;
|
536 |
}
|
537 |
|
538 |
*clientDataPtr = (ClientData) masterPtr;
|
539 |
return TCL_OK;
|
540 |
}
|
541 |
|
542 |
/*
|
543 |
*----------------------------------------------------------------------
|
544 |
*
|
545 |
* ImgPhotoCmd --
|
546 |
*
|
547 |
* This procedure is invoked to process the Tcl command that
|
548 |
* corresponds to a photo image. See the user documentation
|
549 |
* for details on what it does.
|
550 |
*
|
551 |
* Results:
|
552 |
* A standard Tcl result.
|
553 |
*
|
554 |
* Side effects:
|
555 |
* See the user documentation.
|
556 |
*
|
557 |
*----------------------------------------------------------------------
|
558 |
*/
|
559 |
|
560 |
static int
|
561 |
ImgPhotoCmd(clientData, interp, objc, objv)
|
562 |
ClientData clientData; /* Information about photo master. */
|
563 |
Tcl_Interp *interp; /* Current interpreter. */
|
564 |
int objc; /* Number of arguments. */
|
565 |
Tcl_Obj *CONST objv[]; /* Argument objects. */
|
566 |
{
|
567 |
int oldformat = 0;
|
568 |
static char *photoOptions[] = {
|
569 |
"blank", "cget", "configure", "copy", "data", "get", "put",
|
570 |
"read", "redither", "write", (char *) NULL
|
571 |
};
|
572 |
enum options {
|
573 |
PHOTO_BLANK, PHOTO_CGET, PHOTO_CONFIGURE, PHOTO_COPY, PHOTO_DATA,
|
574 |
PHOTO_GET, PHOTO_PUT, PHOTO_READ, PHOTO_REDITHER, PHOTO_WRITE
|
575 |
};
|
576 |
|
577 |
PhotoMaster *masterPtr = (PhotoMaster *) clientData;
|
578 |
int result, index;
|
579 |
int x, y, width, height;
|
580 |
int dataWidth, dataHeight;
|
581 |
struct SubcommandOptions options;
|
582 |
int listArgc;
|
583 |
char **listArgv;
|
584 |
char **srcArgv;
|
585 |
unsigned char *pixelPtr;
|
586 |
Tk_PhotoImageBlock block;
|
587 |
Tk_Window tkwin;
|
588 |
XColor color;
|
589 |
Tk_PhotoImageFormat *imageFormat;
|
590 |
int imageWidth, imageHeight;
|
591 |
int matched;
|
592 |
Tcl_Channel chan;
|
593 |
Tk_PhotoHandle srcHandle;
|
594 |
size_t length;
|
595 |
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
|
596 |
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
|
597 |
|
598 |
if (objc < 2) {
|
599 |
Tcl_WrongNumArgs(interp, 1, objv, "option ?arg arg ...?");
|
600 |
return TCL_ERROR;
|
601 |
}
|
602 |
|
603 |
if (Tcl_GetIndexFromObj(interp, objv[1], photoOptions, "option", 0,
|
604 |
&index) != TCL_OK) {
|
605 |
Tcl_ObjCmdProc *proc;
|
606 |
proc = PhotoOptionFind(interp, objv[1]);
|
607 |
if (proc == (Tcl_ObjCmdProc *) NULL) {
|
608 |
return TCL_ERROR;
|
609 |
}
|
610 |
return proc(clientData, interp, objc, objv);
|
611 |
}
|
612 |
switch ((enum options) index) {
|
613 |
case PHOTO_BLANK: {
|
614 |
/*
|
615 |
* photo blank command - just call Tk_PhotoBlank.
|
616 |
*/
|
617 |
|
618 |
if (objc == 2) {
|
619 |
Tk_PhotoBlank(masterPtr);
|
620 |
} else {
|
621 |
Tcl_WrongNumArgs(interp, 2, objv, (char *) NULL);
|
622 |
return TCL_ERROR;
|
623 |
}
|
624 |
break;
|
625 |
}
|
626 |
case PHOTO_CGET: {
|
627 |
char *arg;
|
628 |
if (objc != 3) {
|
629 |
Tcl_WrongNumArgs(interp, 2, objv, "option");
|
630 |
return TCL_ERROR;
|
631 |
}
|
632 |
arg = Tcl_GetStringFromObj(objv[2], (int *) &length);
|
633 |
if (strncmp(arg,"-data", length) == 0) {
|
634 |
if (masterPtr->dataString) {
|
635 |
Tcl_SetObjResult(interp, masterPtr->dataString);
|
636 |
}
|
637 |
return TCL_OK;
|
638 |
}
|
639 |
if (strncmp(arg,"-format", length) == 0) {
|
640 |
if (masterPtr->format) {
|
641 |
Tcl_SetObjResult(interp, masterPtr->format);
|
642 |
}
|
643 |
return TCL_OK;
|
644 |
}
|
645 |
Tk_ConfigureValue(interp, Tk_MainWindow(interp), configSpecs,
|
646 |
(char *) masterPtr, Tcl_GetString(objv[2]), 0);
|
647 |
break;
|
648 |
}
|
649 |
case PHOTO_CONFIGURE: {
|
650 |
/*
|
651 |
* photo configure command - handle this in the standard way.
|
652 |
*/
|
653 |
|
654 |
if (objc == 2) {
|
655 |
Tcl_Obj *obj, *subobj;
|
656 |
result = Tk_ConfigureInfo(interp, Tk_MainWindow(interp),
|
657 |
configSpecs, (char *) masterPtr, (char *) NULL, 0);
|
658 |
if (result != TCL_OK) {
|
659 |
return result;
|
660 |
}
|
661 |
obj = Tcl_NewObj();
|
662 |
subobj = Tcl_NewStringObj("-data {} {} {}", 14);
|
663 |
if (masterPtr->dataString) {
|
664 |
Tcl_ListObjAppendElement(interp, subobj, masterPtr->dataString);
|
665 |
} else {
|
666 |
Tcl_AppendStringsToObj(subobj, " {}", (char *) NULL);
|
667 |
}
|
668 |
Tcl_ListObjAppendElement(interp, obj, subobj);
|
669 |
subobj = Tcl_NewStringObj("-format {} {} {}", 16);
|
670 |
if (masterPtr->format) {
|
671 |
Tcl_ListObjAppendElement(interp, subobj, masterPtr->format);
|
672 |
} else {
|
673 |
Tcl_AppendStringsToObj(subobj, " {}", (char *) NULL);
|
674 |
}
|
675 |
Tcl_ListObjAppendElement(interp, obj, subobj);
|
676 |
Tcl_ListObjAppendList(interp, obj, Tcl_GetObjResult(interp));
|
677 |
Tcl_SetObjResult(interp, obj);
|
678 |
return TCL_OK;
|
679 |
}
|
680 |
if (objc == 3) {
|
681 |
char *arg = Tcl_GetStringFromObj(objv[2], (int *) &length);
|
682 |
if (!strncmp(arg, "-data", length)) {
|
683 |
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
684 |
"-data {} {} {}", (char *) NULL);
|
685 |
if (masterPtr->dataString) {
|
686 |
Tcl_ListObjAppendElement(interp, Tcl_GetObjResult(interp),
|
687 |
masterPtr->dataString);
|
688 |
} else {
|
689 |
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
690 |
" {}", (char *) NULL);
|
691 |
}
|
692 |
return TCL_OK;
|
693 |
} else if (!strncmp(arg, "-format", length)) {
|
694 |
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
695 |
"-format {} {} {}", (char *) NULL);
|
696 |
if (masterPtr->format) {
|
697 |
Tcl_ListObjAppendElement(interp, Tcl_GetObjResult(interp),
|
698 |
masterPtr->format);
|
699 |
} else {
|
700 |
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
701 |
" {}", (char *) NULL);
|
702 |
}
|
703 |
return TCL_OK;
|
704 |
} else {
|
705 |
return Tk_ConfigureInfo(interp, Tk_MainWindow(interp),
|
706 |
configSpecs, (char *) masterPtr, arg, 0);
|
707 |
}
|
708 |
}
|
709 |
return ImgPhotoConfigureMaster(interp, masterPtr, objc-2, objv+2,
|
710 |
TK_CONFIG_ARGV_ONLY);
|
711 |
break;
|
712 |
}
|
713 |
case PHOTO_COPY: {
|
714 |
/*
|
715 |
* photo copy command - first parse options.
|
716 |
*/
|
717 |
|
718 |
index = 2;
|
719 |
memset((VOID *) &options, 0, sizeof(options));
|
720 |
options.zoomX = options.zoomY = 1;
|
721 |
options.subsampleX = options.subsampleY = 1;
|
722 |
options.name = NULL;
|
723 |
if (ParseSubcommandOptions(&options, interp,
|
724 |
OPT_FROM | OPT_TO | OPT_ZOOM | OPT_SUBSAMPLE | OPT_SHRINK,
|
725 |
&index, objc, objv) != TCL_OK) {
|
726 |
return TCL_ERROR;
|
727 |
}
|
728 |
if (options.name == NULL || index < objc) {
|
729 |
Tcl_WrongNumArgs(interp, 2, objv,
|
730 |
"source-image ?-from x1 y1 x2 y2? ?-to x1 y1 x2 y2? ?-zoom x y? ?-subsample x y?");
|
731 |
return TCL_ERROR;
|
732 |
}
|
733 |
|
734 |
/*
|
735 |
* Look for the source image and get a pointer to its image data.
|
736 |
* Check the values given for the -from option.
|
737 |
*/
|
738 |
|
739 |
if ((srcHandle = Tk_FindPhoto(interp, Tcl_GetString(options.name))) == NULL) {
|
740 |
Tcl_AppendResult(interp, "image \"",
|
741 |
Tcl_GetString(options.name), "\" doesn't",
|
742 |
" exist or is not a photo image", (char *) NULL);
|
743 |
return TCL_ERROR;
|
744 |
}
|
745 |
Tk_PhotoGetImage(srcHandle, &block);
|
746 |
if ((options.fromX2 > block.width) || (options.fromY2 > block.height)
|
747 |
|| (options.fromX2 > block.width)
|
748 |
|| (options.fromY2 > block.height)) {
|
749 |
Tcl_AppendResult(interp, "coordinates for -from option extend ",
|
750 |
"outside source image", (char *) NULL);
|
751 |
return TCL_ERROR;
|
752 |
}
|
753 |
|
754 |
/*
|
755 |
* Fill in default values for unspecified parameters.
|
756 |
*/
|
757 |
|
758 |
if (((options.options & OPT_FROM) == 0) || (options.fromX2 < 0)) {
|
759 |
options.fromX2 = block.width;
|
760 |
options.fromY2 = block.height;
|
761 |
}
|
762 |
if (((options.options & OPT_TO) == 0) || (options.toX2 < 0)) {
|
763 |
width = options.fromX2 - options.fromX;
|
764 |
if (options.subsampleX > 0) {
|
765 |
width = (width + options.subsampleX - 1) / options.subsampleX;
|
766 |
} else if (options.subsampleX == 0) {
|
767 |
width = 0;
|
768 |
} else {
|
769 |
width = (width - options.subsampleX - 1) / -options.subsampleX;
|
770 |
}
|
771 |
options.toX2 = options.toX + width * options.zoomX;
|
772 |
|
773 |
height = options.fromY2 - options.fromY;
|
774 |
if (options.subsampleY > 0) {
|
775 |
height = (height + options.subsampleY - 1)
|
776 |
/ options.subsampleY;
|
777 |
} else if (options.subsampleY == 0) {
|
778 |
height = 0;
|
779 |
} else {
|
780 |
height = (height - options.subsampleY - 1)
|
781 |
/ -options.subsampleY;
|
782 |
}
|
783 |
options.toY2 = options.toY + height * options.zoomY;
|
784 |
}
|
785 |
|
786 |
/*
|
787 |
* Set the destination image size if the -shrink option was specified.
|
788 |
*/
|
789 |
|
790 |
if (options.options & OPT_SHRINK) {
|
791 |
ImgPhotoSetSize(masterPtr, options.toX2, options.toY2);
|
792 |
}
|
793 |
|
794 |
/*
|
795 |
* Copy the image data over using Tk_PhotoPutZoomedBlock.
|
796 |
*/
|
797 |
|
798 |
block.pixelPtr += options.fromX * block.pixelSize
|
799 |
+ options.fromY * block.pitch;
|
800 |
block.width = options.fromX2 - options.fromX;
|
801 |
block.height = options.fromY2 - options.fromY;
|
802 |
Tk_PhotoPutZoomedBlock((Tk_PhotoHandle) masterPtr, &block,
|
803 |
options.toX, options.toY, options.toX2 - options.toX,
|
804 |
options.toY2 - options.toY, options.zoomX, options.zoomY,
|
805 |
options.subsampleX, options.subsampleY);
|
806 |
|
807 |
break;
|
808 |
}
|
809 |
case PHOTO_DATA: {
|
810 |
char *data;
|
811 |
|
812 |
/*
|
813 |
* photo data command - first parse and check any options given.
|
814 |
*/
|
815 |
Tk_ImageStringWriteProc *stringWriteProc = NULL;
|
816 |
|
817 |
index = 2;
|
818 |
memset((VOID *) &options, 0, sizeof(options));
|
819 |
options.name = NULL;
|
820 |
options.format = NULL;
|
821 |
options.fromX = 0;
|
822 |
options.fromY = 0;
|
823 |
if (ParseSubcommandOptions(&options, interp,
|
824 |
OPT_FORMAT | OPT_FROM | OPT_GRAYSCALE | OPT_BACKGROUND,
|
825 |
&index, objc, objv) != TCL_OK) {
|
826 |
return TCL_ERROR;
|
827 |
}
|
828 |
if ((options.name != NULL) || (index < objc)) {
|
829 |
Tcl_WrongNumArgs(interp, 2, objv, "?options?");
|
830 |
return TCL_ERROR;
|
831 |
}
|
832 |
if ((options.fromX > masterPtr->width)
|
833 |
|| (options.fromY > masterPtr->height)
|
834 |
|| (options.fromX2 > masterPtr->width)
|
835 |
|| (options.fromY2 > masterPtr->height)) {
|
836 |
Tcl_AppendResult(interp, "coordinates for -from option extend ",
|
837 |
"outside image", (char *) NULL);
|
838 |
return TCL_ERROR;
|
839 |
}
|
840 |
|
841 |
/*
|
842 |
* Fill in default values for unspecified parameters.
|
843 |
*/
|
844 |
|
845 |
if (((options.options & OPT_FROM) == 0) || (options.fromX2 < 0)) {
|
846 |
options.fromX2 = masterPtr->width;
|
847 |
options.fromY2 = masterPtr->height;
|
848 |
}
|
849 |
|
850 |
/*
|
851 |
* Search for an appropriate image string format handler.
|
852 |
*/
|
853 |
|
854 |
if (options.options & OPT_FORMAT) {
|
855 |
for (imageFormat = tsdPtr->formatList; imageFormat != NULL;
|
856 |
imageFormat = imageFormat->nextPtr) {
|
857 |
if ((strncasecmp(Tcl_GetString(options.format),
|
858 |
imageFormat->name, strlen(imageFormat->name)) == 0)) {
|
859 |
if (imageFormat->stringWriteProc != NULL) {
|
860 |
stringWriteProc = imageFormat->stringWriteProc;
|
861 |
break;
|
862 |
}
|
863 |
}
|
864 |
}
|
865 |
if (stringWriteProc == NULL) {
|
866 |
Tcl_AppendResult(interp, "image string format \"",
|
867 |
Tcl_GetString(options.format),
|
868 |
"\" is not supported", (char *) NULL);
|
869 |
return TCL_ERROR;
|
870 |
}
|
871 |
} else {
|
872 |
stringWriteProc = ImgStringWrite;
|
873 |
}
|
874 |
|
875 |
/*
|
876 |
* Call the handler's string write procedure to write out
|
877 |
* the image.
|
878 |
*/
|
879 |
|
880 |
data = ImgGetPhoto(masterPtr, &block, &options);
|
881 |
|
882 |
result = ((int (*) _ANSI_ARGS_((Tcl_Interp *interp, Tcl_Obj *formatString,
|
883 |
Tk_PhotoImageBlock *blockPtr, VOID *dummy))) stringWriteProc)
|
884 |
(interp, options.format, &block, (VOID *) NULL);
|
885 |
if (options.background) {
|
886 |
Tk_FreeColor(options.background);
|
887 |
}
|
888 |
if (data) {
|
889 |
ckfree(data);
|
890 |
}
|
891 |
return result;
|
892 |
break;
|
893 |
}
|
894 |
case PHOTO_GET: {
|
895 |
/*
|
896 |
* photo get command - first parse and check parameters.
|
897 |
*/
|
898 |
|
899 |
char string[TCL_INTEGER_SPACE * 3];
|
900 |
|
901 |
if (objc != 4) {
|
902 |
Tcl_WrongNumArgs(interp, 2, objv, "x y");
|
903 |
return TCL_ERROR;
|
904 |
}
|
905 |
if ((Tcl_GetIntFromObj(interp, objv[2], &x) != TCL_OK)
|
906 |
|| (Tcl_GetIntFromObj(interp, objv[3], &y) != TCL_OK)) {
|
907 |
return TCL_ERROR;
|
908 |
}
|
909 |
if ((x < 0) || (x >= masterPtr->width)
|
910 |
|| (y < 0) || (y >= masterPtr->height)) {
|
911 |
Tcl_AppendResult(interp, Tcl_GetString(objv[0]), " get: ",
|
912 |
"coordinates out of range", (char *) NULL);
|
913 |
return TCL_ERROR;
|
914 |
}
|
915 |
|
916 |
/*
|
917 |
* Extract the value of the desired pixel and format it as a string.
|
918 |
*/
|
919 |
|
920 |
pixelPtr = masterPtr->pix24 + (y * masterPtr->width + x) * 4;
|
921 |
sprintf(string, "%d %d %d", pixelPtr[0], pixelPtr[1],
|
922 |
pixelPtr[2]);
|
923 |
Tcl_AppendResult(interp, string, (char *) NULL);
|
924 |
break;
|
925 |
}
|
926 |
case PHOTO_PUT: {
|
927 |
/*
|
928 |
* photo put command - first parse the options and colors specified.
|
929 |
*/
|
930 |
|
931 |
index = 2;
|
932 |
memset((VOID *) &options, 0, sizeof(options));
|
933 |
options.name = NULL;
|
934 |
if (ParseSubcommandOptions(&options, interp, OPT_TO|OPT_FORMAT,
|
935 |
&index, objc, objv) != TCL_OK) {
|
936 |
return TCL_ERROR;
|
937 |
}
|
938 |
if ((options.name == NULL) || (index < objc)) {
|
939 |
Tcl_WrongNumArgs(interp, 2, objv, "data ?options?");
|
940 |
return TCL_ERROR;
|
941 |
}
|
942 |
|
943 |
if (MatchStringFormat(interp, options.name ? objv[2]:NULL,
|
944 |
options.format, &imageFormat, &imageWidth,
|
945 |
&imageHeight, &oldformat) == TCL_OK) {
|
946 |
Tcl_Obj *format;
|
947 |
Tcl_Obj *data;
|
948 |
if (((options.options & OPT_TO) == 0) || (options.toX2 < 0)) {
|
949 |
options.toX2 = options.toX + imageWidth;
|
950 |
options.toY2 = options.toY + imageHeight;
|
951 |
}
|
952 |
if (imageWidth > options.toX2 - options.toX) {
|
953 |
imageWidth = options.toX2 - options.toX;
|
954 |
}
|
955 |
if (imageHeight > options.toY2 - options.toY) {
|
956 |
imageHeight = options.toY2 - options.toY;
|
957 |
}
|
958 |
format = options.format;
|
959 |
data = objv[2];
|
960 |
if (oldformat) {
|
961 |
if (format) {
|
962 |
format = (Tcl_Obj *) Tcl_GetString(format);
|
963 |
}
|
964 |
data = (Tcl_Obj *) Tcl_GetString(data);
|
965 |
}
|
966 |
if ((*imageFormat->stringReadProc)(interp, data,
|
967 |
format, (Tk_PhotoHandle) masterPtr,
|
968 |
0, 0, imageWidth, imageHeight, options.toX, options.toY)
|
969 |
!= TCL_OK) {
|
970 |
return TCL_ERROR;
|
971 |
}
|
972 |
masterPtr->flags |= IMAGE_CHANGED;
|
973 |
return TCL_OK;
|
974 |
}
|
975 |
if (options.options & OPT_FORMAT) {
|
976 |
return TCL_ERROR;
|
977 |
}
|
978 |
Tcl_ResetResult(interp);
|
979 |
if (Tcl_SplitList(interp, Tcl_GetString(options.name),
|
980 |
&dataHeight, &srcArgv)
|
981 |
!= TCL_OK) {
|
982 |
return TCL_ERROR;
|
983 |
}
|
984 |
tkwin = Tk_MainWindow(interp);
|
985 |
block.pixelPtr = NULL;
|
986 |
dataWidth = 0;
|
987 |
pixelPtr = NULL;
|
988 |
for (y = 0; y < dataHeight; ++y) {
|
989 |
if (Tcl_SplitList(interp, srcArgv[y], &listArgc, &listArgv)
|
990 |
!= TCL_OK) {
|
991 |
break;
|
992 |
}
|
993 |
if (y == 0) {
|
994 |
dataWidth = listArgc;
|
995 |
pixelPtr = (unsigned char *) ckalloc((unsigned)
|
996 |
dataWidth * dataHeight * 3);
|
997 |
block.pixelPtr = pixelPtr;
|
998 |
} else {
|
999 |
if (listArgc != dataWidth) {
|
1000 |
Tcl_AppendResult(interp, "all elements of color list must",
|
1001 |
" have the same number of elements",
|
1002 |
(char *) NULL);
|
1003 |
ckfree((char *) listArgv);
|
1004 |
break;
|
1005 |
}
|
1006 |
}
|
1007 |
for (x = 0; x < dataWidth; ++x) {
|
1008 |
if (!XParseColor(Tk_Display(tkwin), Tk_Colormap(tkwin),
|
1009 |
listArgv[x], &color)) {
|
1010 |
Tcl_AppendResult(interp, "can't parse color \"",
|
1011 |
listArgv[x], "\"", (char *) NULL);
|
1012 |
break;
|
1013 |
}
|
1014 |
*pixelPtr++ = color.red >> 8;
|
1015 |
*pixelPtr++ = color.green >> 8;
|
1016 |
*pixelPtr++ = color.blue >> 8;
|
1017 |
}
|
1018 |
ckfree((char *) listArgv);
|
1019 |
if (x < dataWidth)
|
1020 |
break;
|
1021 |
}
|
1022 |
ckfree((char *) srcArgv);
|
1023 |
if (y < dataHeight || dataHeight == 0 || dataWidth == 0) {
|
1024 |
if (block.pixelPtr != NULL) {
|
1025 |
ckfree((char *) block.pixelPtr);
|
1026 |
}
|
1027 |
if (y < dataHeight) {
|
1028 |
return TCL_ERROR;
|
1029 |
}
|
1030 |
return TCL_OK;
|
1031 |
}
|
1032 |
|
1033 |
/*
|
1034 |
* Fill in default values for the -to option, then
|
1035 |
* copy the block in using Tk_PhotoPutBlock.
|
1036 |
*/
|
1037 |
|
1038 |
if (((options.options & OPT_TO) == 0) || (options.toX2 < 0)) {
|
1039 |
options.toX2 = options.toX + dataWidth;
|
1040 |
options.toY2 = options.toY + dataHeight;
|
1041 |
}
|
1042 |
block.width = dataWidth;
|
1043 |
block.height = dataHeight;
|
1044 |
block.pitch = dataWidth * 3;
|
1045 |
block.pixelSize = 3;
|
1046 |
block.offset[0] = 0;
|
1047 |
block.offset[1] = 1;
|
1048 |
block.offset[2] = 2;
|
1049 |
block.offset[3] = 0;
|
1050 |
Tk_PhotoPutBlock((ClientData)masterPtr, &block,
|
1051 |
options.toX, options.toY, options.toX2 - options.toX,
|
1052 |
options.toY2 - options.toY);
|
1053 |
ckfree((char *) block.pixelPtr);
|
1054 |
break;
|
1055 |
}
|
1056 |
case PHOTO_READ: {
|
1057 |
/*
|
1058 |
* photo read command - first parse the options specified.
|
1059 |
*/
|
1060 |
|
1061 |
Tcl_Obj *format;
|
1062 |
index = 2;
|
1063 |
memset((VOID *) &options, 0, sizeof(options));
|
1064 |
options.name = NULL;
|
1065 |
options.format = NULL;
|
1066 |
if (ParseSubcommandOptions(&options, interp,
|
1067 |
OPT_FORMAT | OPT_FROM | OPT_TO | OPT_SHRINK,
|
1068 |
&index, objc, objv) != TCL_OK) {
|
1069 |
return TCL_ERROR;
|
1070 |
}
|
1071 |
if ((options.name == NULL) || (index < objc)) {
|
1072 |
Tcl_WrongNumArgs(interp, 2, objv,
|
1073 |
"fileName ?options?");
|
1074 |
return TCL_ERROR;
|
1075 |
}
|
1076 |
|
1077 |
/*
|
1078 |
* Prevent file system access in safe interpreters.
|
1079 |
*/
|
1080 |
|
1081 |
if (Tcl_IsSafe(interp)) {
|
1082 |
Tcl_AppendResult(interp, "can't get image from a file in a",
|
1083 |
" safe interpreter", (char *) NULL);
|
1084 |
return TCL_ERROR;
|
1085 |
}
|
1086 |
|
1087 |
/*
|
1088 |
* Open the image file and look for a handler for it.
|
1089 |
*/
|
1090 |
|
1091 |
chan = Tcl_OpenFileChannel(interp,
|
1092 |
Tcl_GetString(options.name), "r", 0);
|
1093 |
if (chan == NULL) {
|
1094 |
return TCL_ERROR;
|
1095 |
}
|
1096 |
if (Tcl_SetChannelOption(interp, chan, "-translation", "binary")
|
1097 |
!= TCL_OK) {
|
1098 |
return TCL_ERROR;
|
1099 |
}
|
1100 |
if (Tcl_SetChannelOption(interp, chan, "-encoding", "binary")
|
1101 |
!= TCL_OK) {
|
1102 |
return TCL_ERROR;
|
1103 |
}
|
1104 |
|
1105 |
if (MatchFileFormat(interp, chan,
|
1106 |
Tcl_GetString(options.name), options.format,
|
1107 |
&imageFormat, &imageWidth, &imageHeight, &oldformat) != TCL_OK) {
|
1108 |
Tcl_Close(NULL, chan);
|
1109 |
return TCL_ERROR;
|
1110 |
}
|
1111 |
|
1112 |
/*
|
1113 |
* Check the values given for the -from option.
|
1114 |
*/
|
1115 |
|
1116 |
if ((options.fromX > imageWidth) || (options.fromY > imageHeight)
|
1117 |
|| (options.fromX2 > imageWidth)
|
1118 |
|| (options.fromY2 > imageHeight)) {
|
1119 |
Tcl_AppendResult(interp, "coordinates for -from option extend ",
|
1120 |
"outside source image", (char *) NULL);
|
1121 |
Tcl_Close(NULL, chan);
|
1122 |
return TCL_ERROR;
|
1123 |
}
|
1124 |
if (((options.options & OPT_FROM) == 0) || (options.fromX2 < 0)) {
|
1125 |
width = imageWidth - options.fromX;
|
1126 |
height = imageHeight - options.fromY;
|
1127 |
} else {
|
1128 |
width = options.fromX2 - options.fromX;
|
1129 |
height = options.fromY2 - options.fromY;
|
1130 |
}
|
1131 |
|
1132 |
/*
|
1133 |
* If the -shrink option was specified, set the size of the image.
|
1134 |
*/
|
1135 |
|
1136 |
if (options.options & OPT_SHRINK) {
|
1137 |
ImgPhotoSetSize(masterPtr, options.toX + width,
|
1138 |
options.toY + height);
|
1139 |
}
|
1140 |
|
1141 |
/*
|
1142 |
* Call the handler's file read procedure to read the data
|
1143 |
* into the image.
|
1144 |
*/
|
1145 |
|
1146 |
format = options.format;
|
1147 |
if (oldformat && format) {
|
1148 |
format = (Tcl_Obj *) Tcl_GetString(format);
|
1149 |
}
|
1150 |
result = (*imageFormat->fileReadProc)(interp, chan,
|
1151 |
Tcl_GetString(options.name),
|
1152 |
format, (Tk_PhotoHandle) masterPtr, options.toX,
|
1153 |
options.toY, width, height, options.fromX, options.fromY);
|
1154 |
if (chan != NULL) {
|
1155 |
Tcl_Close(NULL, chan);
|
1156 |
}
|
1157 |
return result;
|
1158 |
break;
|
1159 |
}
|
1160 |
case PHOTO_REDITHER: {
|
1161 |
if (objc == 2) {
|
1162 |
/*
|
1163 |
* Call Dither if any part of the image is not correctly
|
1164 |
* dithered at present.
|
1165 |
*/
|
1166 |
|
1167 |
x = masterPtr->ditherX;
|
1168 |
y = masterPtr->ditherY;
|
1169 |
if (masterPtr->ditherX != 0) {
|
1170 |
Tk_DitherPhoto((Tk_PhotoHandle) masterPtr, x, y, masterPtr->width - x, 1);
|
1171 |
}
|
1172 |
if (masterPtr->ditherY < masterPtr->height) {
|
1173 |
x = 0;
|
1174 |
Tk_DitherPhoto((Tk_PhotoHandle)masterPtr, 0, masterPtr->ditherY, masterPtr->width,
|
1175 |
masterPtr->height - masterPtr->ditherY);
|
1176 |
}
|
1177 |
|
1178 |
if (y < masterPtr->height) {
|
1179 |
/*
|
1180 |
* Tell the core image code that part of the image has changed.
|
1181 |
*/
|
1182 |
|
1183 |
Tk_ImageChanged(masterPtr->tkMaster, x, y,
|
1184 |
(masterPtr->width - x), (masterPtr->height - y),
|
1185 |
masterPtr->width, masterPtr->height);
|
1186 |
}
|
1187 |
|
1188 |
} else {
|
1189 |
Tcl_WrongNumArgs(interp, 2, objv, (char *) NULL);
|
1190 |
return TCL_ERROR;
|
1191 |
}
|
1192 |
break;
|
1193 |
}
|
1194 |
case PHOTO_WRITE: {
|
1195 |
char *data;
|
1196 |
Tcl_Obj *format;
|
1197 |
|
1198 |
/*
|
1199 |
* Prevent file system access in safe interpreters.
|
1200 |
*/
|
1201 |
|
1202 |
if (Tcl_IsSafe(interp)) {
|
1203 |
Tcl_AppendResult(interp, "can't write image to a file in a",
|
1204 |
" safe interpreter", (char *) NULL);
|
1205 |
return TCL_ERROR;
|
1206 |
}
|
1207 |
|
1208 |
/*
|
1209 |
* photo write command - first parse and check any options given.
|
1210 |
*/
|
1211 |
|
1212 |
index = 2;
|
1213 |
memset((VOID *) &options, 0, sizeof(options));
|
1214 |
options.name = NULL;
|
1215 |
options.format = NULL;
|
1216 |
if (ParseSubcommandOptions(&options, interp,
|
1217 |
OPT_FORMAT | OPT_FROM | OPT_GRAYSCALE | OPT_BACKGROUND,
|
1218 |
&index, objc, objv) != TCL_OK) {
|
1219 |
return TCL_ERROR;
|
1220 |
}
|
1221 |
if ((options.name == NULL) || (index < objc)) {
|
1222 |
Tcl_WrongNumArgs(interp, 2, objv, "fileName ?options?");
|
1223 |
return TCL_ERROR;
|
1224 |
}
|
1225 |
if ((options.fromX > masterPtr->width)
|
1226 |
|| (options.fromY > masterPtr->height)
|
1227 |
|| (options.fromX2 > masterPtr->width)
|
1228 |
|| (options.fromY2 > masterPtr->height)) {
|
1229 |
Tcl_AppendResult(interp, "coordinates for -from option extend ",
|
1230 |
"outside image", (char *) NULL);
|
1231 |
return TCL_ERROR;
|
1232 |
}
|
1233 |
|
1234 |
/*
|
1235 |
* Fill in default values for unspecified parameters.
|
1236 |
*/
|
1237 |
|
1238 |
if (((options.options & OPT_FROM) == 0) || (options.fromX2 < 0)) {
|
1239 |
options.fromX2 = masterPtr->width;
|
1240 |
options.fromY2 = masterPtr->height;
|
1241 |
}
|
1242 |
|
1243 |
/*
|
1244 |
* Search for an appropriate image file format handler,
|
1245 |
* and give an error if none is found.
|
1246 |
*/
|
1247 |
|
1248 |
matched = 0;
|
1249 |
for (imageFormat = tsdPtr->formatList; imageFormat != NULL;
|
1250 |
imageFormat = imageFormat->nextPtr) {
|
1251 |
if ((options.format == NULL)
|
1252 |
|| (strncasecmp(Tcl_GetString(options.format),
|
1253 |
imageFormat->name, strlen(imageFormat->name)) == 0)) {
|
1254 |
matched = 1;
|
1255 |
if (imageFormat->fileWriteProc != NULL) {
|
1256 |
break;
|
1257 |
}
|
1258 |
}
|
1259 |
}
|
1260 |
if (imageFormat == NULL) {
|
1261 |
oldformat = 1;
|
1262 |
for (imageFormat = tsdPtr->oldFormatList; imageFormat != NULL;
|
1263 |
imageFormat = imageFormat->nextPtr) {
|
1264 |
if ((options.format == NULL)
|
1265 |
|| (strncasecmp(Tcl_GetString(options.format),
|
1266 |
imageFormat->name, strlen(imageFormat->name)) == 0)) {
|
1267 |
matched = 1;
|
1268 |
if (imageFormat->fileWriteProc != NULL) {
|
1269 |
break;
|
1270 |
}
|
1271 |
}
|
1272 |
}
|
1273 |
}
|
1274 |
if (imageFormat == NULL) {
|
1275 |
if (options.format == NULL) {
|
1276 |
Tcl_AppendResult(interp, "no available image file format ",
|
1277 |
"has file writing capability", (char *) NULL);
|
1278 |
} else if (!matched) {
|
1279 |
Tcl_AppendResult(interp, "image file format \"",
|
1280 |
Tcl_GetString(options.format),
|
1281 |
"\" is unknown", (char *) NULL);
|
1282 |
} else {
|
1283 |
Tcl_AppendResult(interp, "image file format \"",
|
1284 |
Tcl_GetString(options.format),
|
1285 |
"\" has no file writing capability",
|
1286 |
(char *) NULL);
|
1287 |
}
|
1288 |
return TCL_ERROR;
|
1289 |
}
|
1290 |
|
1291 |
/*
|
1292 |
* Call the handler's file write procedure to write out
|
1293 |
* the image.
|
1294 |
*/
|
1295 |
|
1296 |
data = ImgGetPhoto(masterPtr, &block, &options);
|
1297 |
format = options.format;
|
1298 |
if (oldformat && format) {
|
1299 |
format = (Tcl_Obj *) Tcl_GetString(options.format);
|
1300 |
}
|
1301 |
result = (*imageFormat->fileWriteProc)(interp,
|
1302 |
Tcl_GetString(options.name),
|
1303 |
format, &block);
|
1304 |
if (options.background) {
|
1305 |
Tk_FreeColor(options.background);
|
1306 |
}
|
1307 |
if (data) {
|
1308 |
ckfree(data);
|
1309 |
}
|
1310 |
return result;
|
1311 |
break;
|
1312 |
}
|
1313 |
}
|
1314 |
|
1315 |
return TCL_OK;
|
1316 |
}
|
1317 |
|
1318 |
/*
|
1319 |
*----------------------------------------------------------------------
|
1320 |
*
|
1321 |
* ParseSubcommandOptions --
|
1322 |
*
|
1323 |
* This procedure is invoked to process one of the options
|
1324 |
* which may be specified for the photo image subcommands,
|
1325 |
* namely, -from, -to, -zoom, -subsample, -format, and -shrink.
|
1326 |
*
|
1327 |
* Results:
|
1328 |
* A standard Tcl result.
|
1329 |
*
|
1330 |
* Side effects:
|
1331 |
* Fields in *optPtr get filled in.
|
1332 |
*
|
1333 |
*----------------------------------------------------------------------
|
1334 |
*/
|
1335 |
|
1336 |
static int
|
1337 |
ParseSubcommandOptions(optPtr, interp, allowedOptions, optIndexPtr, objc, objv)
|
1338 |
struct SubcommandOptions *optPtr;
|
1339 |
/* Information about the options specified
|
1340 |
* and the values given is returned here. */
|
1341 |
Tcl_Interp *interp; /* Interpreter to use for reporting errors. */
|
1342 |
int allowedOptions; /* Indicates which options are valid for
|
1343 |
* the current command. */
|
1344 |
int *optIndexPtr; /* Points to a variable containing the
|
1345 |
* current index in objv; this variable is
|
1346 |
* updated by this procedure. */
|
1347 |
int objc; /* Number of arguments in objv[]. */
|
1348 |
Tcl_Obj *CONST objv[]; /* Arguments to be parsed. */
|
1349 |
{
|
1350 |
int index, c, bit, currentBit;
|
1351 |
int length;
|
1352 |
char *option, **listPtr;
|
1353 |
int values[4];
|
1354 |
int numValues, maxValues, argIndex;
|
1355 |
|
1356 |
for (index = *optIndexPtr; index < objc; *optIndexPtr = ++index) {
|
1357 |
/*
|
1358 |
* We can have one value specified without an option;
|
1359 |
* it goes into optPtr->name.
|
1360 |
*/
|
1361 |
|
1362 |
option = Tcl_GetStringFromObj(objv[index], &length);
|
1363 |
if (option[0] != '-') {
|
1364 |
if (optPtr->name == NULL) {
|
1365 |
optPtr->name = objv[index];
|
1366 |
continue;
|
1367 |
}
|
1368 |
break;
|
1369 |
}
|
1370 |
|
1371 |
/*
|
1372 |
* Work out which option this is.
|
1373 |
*/
|
1374 |
|
1375 |
c = option[0];
|
1376 |
bit = 0;
|
1377 |
currentBit = 1;
|
1378 |
for (listPtr = optionNames; *listPtr != NULL; ++listPtr) {
|
1379 |
if ((c == *listPtr[0])
|
1380 |
&& (strncmp(option, *listPtr, (size_t) length) == 0)) {
|
1381 |
if (bit != 0) {
|
1382 |
bit = 0; /* An ambiguous option. */
|
1383 |
break;
|
1384 |
}
|
1385 |
bit = currentBit;
|
1386 |
}
|
1387 |
currentBit <<= 1;
|
1388 |
}
|
1389 |
|
1390 |
/*
|
1391 |
* If this option is not recognized and allowed, put
|
1392 |
* an error message in the interpreter and return.
|
1393 |
*/
|
1394 |
|
1395 |
if ((allowedOptions & bit) == 0) {
|
1396 |
Tcl_AppendResult(interp, "unrecognized option \"",
|
1397 |
Tcl_GetString(objv[index]),
|
1398 |
"\": must be ", (char *)NULL);
|
1399 |
bit = 1;
|
1400 |
for (listPtr = optionNames; *listPtr != NULL; ++listPtr) {
|
1401 |
if ((allowedOptions & bit) != 0) {
|
1402 |
if ((allowedOptions & (bit - 1)) != 0) {
|
1403 |
Tcl_AppendResult(interp, ", ", (char *) NULL);
|
1404 |
if ((allowedOptions & ~((bit << 1) - 1)) == 0) {
|
1405 |
Tcl_AppendResult(interp, "or ", (char *) NULL);
|
1406 |
}
|
1407 |
}
|
1408 |
Tcl_AppendResult(interp, *listPtr, (char *) NULL);
|
1409 |
}
|
1410 |
bit <<= 1;
|
1411 |
}
|
1412 |
return TCL_ERROR;
|
1413 |
}
|
1414 |
|
1415 |
/*
|
1416 |
* For the -from, -to, -zoom and -subsample options,
|
1417 |
* parse the values given. Report an error if too few
|
1418 |
* or too many values are given.
|
1419 |
*/
|
1420 |
|
1421 |
if (bit == OPT_BACKGROUND) {
|
1422 |
/*
|
1423 |
* The -background option takes a single XColor value.
|
1424 |
*/
|
1425 |
|
1426 |
if (index + 1 < objc) {
|
1427 |
*optIndexPtr = ++index;
|
1428 |
optPtr->background = Tk_GetColor(interp, Tk_MainWindow(interp),
|
1429 |
Tk_GetUid(Tcl_GetString(objv[index])));
|
1430 |
if (!optPtr->background) {
|
1431 |
return TCL_ERROR;
|
1432 |
}
|
1433 |
} else {
|
1434 |
Tcl_AppendResult(interp, "the \"-background\" option ",
|
1435 |
"requires a value", (char *) NULL);
|
1436 |
return TCL_ERROR;
|
1437 |
}
|
1438 |
} else if (bit == OPT_FORMAT) {
|
1439 |
/*
|
1440 |
* The -format option takes a single string value.
|
1441 |
*/
|
1442 |
|
1443 |
if (index + 1 < objc) {
|
1444 |
*optIndexPtr = ++index;
|
1445 |
optPtr->format = objv[index];
|
1446 |
} else {
|
1447 |
Tcl_AppendResult(interp, "the \"-format\" option ",
|
1448 |
"requires a value", (char *) NULL);
|
1449 |
return TCL_ERROR;
|
1450 |
}
|
1451 |
} else if ((bit != OPT_SHRINK) && (bit != OPT_GRAYSCALE)) {
|
1452 |
char *val;
|
1453 |
maxValues = ((bit == OPT_FROM) || (bit == OPT_TO))? 4: 2;
|
1454 |
argIndex = index + 1;
|
1455 |
for (numValues = 0; numValues < maxValues; ++numValues) {
|
1456 |
if (argIndex >= objc) {
|
1457 |
break;
|
1458 |
}
|
1459 |
val = Tcl_GetString(objv[argIndex]);
|
1460 |
if ((argIndex < objc) && (isdigit(UCHAR(val[0]))
|
1461 |
|| ((val[0] == '-') && isdigit(UCHAR(val[1]))))) {
|
1462 |
if (Tcl_GetInt(interp, val, &values[numValues])
|
1463 |
!= TCL_OK) {
|
1464 |
return TCL_ERROR;
|
1465 |
}
|
1466 |
} else {
|
1467 |
break;
|
1468 |
}
|
1469 |
++argIndex;
|
1470 |
}
|
1471 |
|
1472 |
if (numValues == 0) {
|
1473 |
Tcl_AppendResult(interp, "the \"", option, "\" option ",
|
1474 |
"requires one ", maxValues == 2? "or two": "to four",
|
1475 |
" integer values", (char *) NULL);
|
1476 |
return TCL_ERROR;
|
1477 |
}
|
1478 |
*optIndexPtr = (index += numValues);
|
1479 |
|
1480 |
/*
|
1481 |
* Y values default to the corresponding X value if not specified.
|
1482 |
*/
|
1483 |
|
1484 |
if (numValues == 1) {
|
1485 |
values[1] = values[0];
|
1486 |
}
|
1487 |
if (numValues == 3) {
|
1488 |
values[3] = values[2];
|
1489 |
}
|
1490 |
|
1491 |
/*
|
1492 |
* Check the values given and put them in the appropriate
|
1493 |
* field of the SubcommandOptions structure.
|
1494 |
*/
|
1495 |
|
1496 |
switch (bit) {
|
1497 |
case OPT_FROM:
|
1498 |
if ((values[0] < 0) || (values[1] < 0) || ((numValues > 2)
|
1499 |
&& ((values[2] < 0) || (values[3] < 0)))) {
|
1500 |
Tcl_AppendResult(interp, "value(s) for the -from",
|
1501 |
" option must be non-negative", (char *) NULL);
|
1502 |
return TCL_ERROR;
|
1503 |
}
|
1504 |
if (numValues <= 2) {
|
1505 |
optPtr->fromX = values[0];
|
1506 |
optPtr->fromY = values[1];
|
1507 |
optPtr->fromX2 = -1;
|
1508 |
optPtr->fromY2 = -1;
|
1509 |
} else {
|
1510 |
optPtr->fromX = MIN(values[0], values[2]);
|
1511 |
optPtr->fromY = MIN(values[1], values[3]);
|
1512 |
optPtr->fromX2 = MAX(values[0], values[2]);
|
1513 |
optPtr->fromY2 = MAX(values[1], values[3]);
|
1514 |
}
|
1515 |
break;
|
1516 |
case OPT_SUBSAMPLE:
|
1517 |
optPtr->subsampleX = values[0];
|
1518 |
optPtr->subsampleY = values[1];
|
1519 |
break;
|
1520 |
case OPT_TO:
|
1521 |
if ((values[0] < 0) || (values[1] < 0) || ((numValues > 2)
|
1522 |
&& ((values[2] < 0) || (values[3] < 0)))) {
|
1523 |
Tcl_AppendResult(interp, "value(s) for the -to",
|
1524 |
" option must be non-negative", (char *) NULL);
|
1525 |
return TCL_ERROR;
|
1526 |
}
|
1527 |
if (numValues <= 2) {
|
1528 |
optPtr->toX = values[0];
|
1529 |
optPtr->toY = values[1];
|
1530 |
optPtr->toX2 = -1;
|
1531 |
optPtr->toY2 = -1;
|
1532 |
} else {
|
1533 |
optPtr->toX = MIN(values[0], values[2]);
|
1534 |
optPtr->toY = MIN(values[1], values[3]);
|
1535 |
optPtr->toX2 = MAX(values[0], values[2]);
|
1536 |
optPtr->toY2 = MAX(values[1], values[3]);
|
1537 |
}
|
1538 |
break;
|
1539 |
case OPT_ZOOM:
|
1540 |
if ((values[0] <= 0) || (values[1] <= 0)) {
|
1541 |
Tcl_AppendResult(interp, "value(s) for the -zoom",
|
1542 |
" option must be positive", (char *) NULL);
|
1543 |
return TCL_ERROR;
|
1544 |
}
|
1545 |
optPtr->zoomX = values[0];
|
1546 |
optPtr->zoomY = values[1];
|
1547 |
break;
|
1548 |
}
|
1549 |
}
|
1550 |
|
1551 |
/*
|
1552 |
* Remember that we saw this option.
|
1553 |
*/
|
1554 |
|
1555 |
optPtr->options |= bit;
|
1556 |
}
|
1557 |
|
1558 |
return TCL_OK;
|
1559 |
}
|
1560 |
|
1561 |
/*
|
1562 |
*----------------------------------------------------------------------
|
1563 |
*
|
1564 |
* ImgPhotoConfigureMaster --
|
1565 |
*
|
1566 |
* This procedure is called when a photo image is created or
|
1567 |
* reconfigured. It processes configuration options and resets
|
1568 |
* any instances of the image.
|
1569 |
*
|
1570 |
* Results:
|
1571 |
* A standard Tcl return value. If TCL_ERROR is returned then
|
1572 |
* an error message is left in the masterPtr->interp's result.
|
1573 |
*
|
1574 |
* Side effects:
|
1575 |
* Existing instances of the image will be redisplayed to match
|
1576 |
* the new configuration options.
|
1577 |
*
|
1578 |
*----------------------------------------------------------------------
|
1579 |
*/
|
1580 |
|
1581 |
static int
|
1582 |
ImgPhotoConfigureMaster(interp, masterPtr, objc, objv, flags)
|
1583 |
Tcl_Interp *interp; /* Interpreter to use for reporting errors. */
|
1584 |
PhotoMaster *masterPtr; /* Pointer to data structure describing
|
1585 |
* overall photo image to (re)configure. */
|
1586 |
int objc; /* Number of entries in objv. */
|
1587 |
Tcl_Obj *CONST objv[]; /* Pairs of configuration options for image. */
|
1588 |
int flags; /* Flags to pass to Tk_ConfigureWidget,
|
1589 |
* such as TK_CONFIG_ARGV_ONLY. */
|
1590 |
{
|
1591 |
PhotoInstance *instancePtr;
|
1592 |
char *oldFileString, *oldPaletteString;
|
1593 |
Tcl_Obj *oldData, *data = NULL, *oldFormat, *format = NULL;
|
1594 |
int length, i, j;
|
1595 |
double oldGamma;
|
1596 |
int result;
|
1597 |
Tcl_Channel chan;
|
1598 |
Tk_PhotoImageFormat *imageFormat;
|
1599 |
int imageWidth, imageHeight;
|
1600 |
char **args;
|
1601 |
int oldformat;
|
1602 |
Tcl_Obj *tempdata, *tempformat;
|
1603 |
|
1604 |
args = (char **) ckalloc((objc + 1) * sizeof(char *));
|
1605 |
for (i = 0, j = 0; i < objc; i++,j++) {
|
1606 |
args[j] = Tcl_GetStringFromObj(objv[i], &length);
|
1607 |
if ((length > 1) && (args[j][0] == '-')) {
|
1608 |
if ((args[j][1] == 'd') &&
|
1609 |
!strncmp(args[j],"-data", (size_t) length)) {
|
1610 |
if (i < objc) {
|
1611 |
data = objv[++i];
|
1612 |
j--;
|
1613 |
}
|
1614 |
} else if ((args[j][1] == 'f') &&
|
1615 |
!strncmp(args[j],"-format", (size_t) length)) {
|
1616 |
if (i < objc) {
|
1617 |
format = objv[++i];
|
1618 |
j--;
|
1619 |
}
|
1620 |
}
|
1621 |
}
|
1622 |
}
|
1623 |
|
1624 |
/*
|
1625 |
* Save the current values for fileString and dataString, so we
|
1626 |
* can tell if the user specifies them anew.
|
1627 |
* IMPORTANT: if the format changes we have to interpret
|
1628 |
* "-file" and "-data" again as well!!!!!!! It might be
|
1629 |
* that the format string influences how "-data" or "-file"
|
1630 |
* is interpreted.
|
1631 |
*/
|
1632 |
|
1633 |
oldFileString = masterPtr->fileString;
|
1634 |
oldData = (oldFileString == NULL) ? masterPtr->dataString: NULL;
|
1635 |
oldFormat = masterPtr->format;
|
1636 |
oldPaletteString = masterPtr->palette;
|
1637 |
oldGamma = masterPtr->gamma;
|
1638 |
|
1639 |
/*
|
1640 |
* Process the configuration options specified.
|
1641 |
*/
|
1642 |
|
1643 |
if (Tk_ConfigureWidget(interp, Tk_MainWindow(interp), configSpecs,
|
1644 |
j, args, (char *) masterPtr, flags) != TCL_OK) {
|
1645 |
ckfree((char *) args);
|
1646 |
return TCL_ERROR;
|
1647 |
}
|
1648 |
ckfree((char *) args);
|
1649 |
|
1650 |
/*
|
1651 |
* Regard the empty string for -file, -data or -format as the null
|
1652 |
* value.
|
1653 |
*/
|
1654 |
|
1655 |
if ((masterPtr->fileString != NULL) && (masterPtr->fileString[0] == 0)) {
|
1656 |
ckfree(masterPtr->fileString);
|
1657 |
masterPtr->fileString = NULL;
|
1658 |
}
|
1659 |
if (data) {
|
1660 |
if (data->length
|
1661 |
|| (data->typePtr == Tcl_GetObjType("bytearray")
|
1662 |
&& data->internalRep.otherValuePtr != NULL)) {
|
1663 |
Tcl_IncrRefCount(data);
|
1664 |
} else {
|
1665 |
data = NULL;
|
1666 |
}
|
1667 |
if (masterPtr->dataString) {
|
1668 |
Tcl_DecrRefCount(masterPtr->dataString);
|
1669 |
}
|
1670 |
masterPtr->dataString = data;
|
1671 |
}
|
1672 |
if (format) {
|
1673 |
if (format->length) {
|
1674 |
Tcl_IncrRefCount(format);
|
1675 |
} else {
|
1676 |
format = NULL;
|
1677 |
}
|
1678 |
if (masterPtr->format) {
|
1679 |
Tcl_DecrRefCount(masterPtr->format);
|
1680 |
}
|
1681 |
masterPtr->format = format;
|
1682 |
}
|
1683 |
/*
|
1684 |
* Set the image to the user-requested size, if any,
|
1685 |
* and make sure storage is correctly allocated for this image.
|
1686 |
*/
|
1687 |
|
1688 |
ImgPhotoSetSize(masterPtr, masterPtr->width, masterPtr->height);
|
1689 |
|
1690 |
/*
|
1691 |
* Read in the image from the file or string if the user has
|
1692 |
* specified the -file or -data option.
|
1693 |
*/
|
1694 |
|
1695 |
if ((masterPtr->fileString != NULL)
|
1696 |
&& ((masterPtr->fileString != oldFileString)
|
1697 |
|| (masterPtr->format != oldFormat))) {
|
1698 |
|
1699 |
/*
|
1700 |
* Prevent file system access in a safe interpreter.
|
1701 |
*/
|
1702 |
|
1703 |
if (Tcl_IsSafe(interp)) {
|
1704 |
Tcl_AppendResult(interp, "can't get image from a file in a",
|
1705 |
" safe interpreter", (char *) NULL);
|
1706 |
return TCL_ERROR;
|
1707 |
}
|
1708 |
|
1709 |
chan = Tcl_OpenFileChannel(interp, masterPtr->fileString, "r", 0);
|
1710 |
if (chan == NULL) {
|
1711 |
return TCL_ERROR;
|
1712 |
}
|
1713 |
if (Tcl_SetChannelOption(interp, chan, "-translation", "binary")
|
1714 |
!= TCL_OK) {
|
1715 |
return TCL_ERROR;
|
1716 |
}
|
1717 |
if (Tcl_SetChannelOption(interp, chan, "-encoding", "binary")
|
1718 |
!= TCL_OK) {
|
1719 |
return TCL_ERROR;
|
1720 |
}
|
1721 |
if (MatchFileFormat(interp, chan, masterPtr->fileString,
|
1722 |
masterPtr->format, &imageFormat, &imageWidth,
|
1723 |
&imageHeight, &oldformat) != TCL_OK) {
|
1724 |
Tcl_Close(NULL, chan);
|
1725 |
return TCL_ERROR;
|
1726 |
}
|
1727 |
ImgPhotoSetSize(masterPtr, imageWidth, imageHeight);
|
1728 |
tempformat = masterPtr->format;
|
1729 |
if (oldformat && tempformat) {
|
1730 |
tempformat = (Tcl_Obj *) Tcl_GetString(tempformat);
|
1731 |
}
|
1732 |
result = (*imageFormat->fileReadProc)(interp, chan,
|
1733 |
masterPtr->fileString, tempformat,
|
1734 |
(Tk_PhotoHandle) masterPtr, 0, 0,
|
1735 |
imageWidth, imageHeight, 0, 0);
|
1736 |
Tcl_Close(NULL, chan);
|
1737 |
if (result != TCL_OK) {
|
1738 |
return TCL_ERROR;
|
1739 |
}
|
1740 |
|
1741 |
Tcl_ResetResult(interp);
|
1742 |
masterPtr->flags |= IMAGE_CHANGED;
|
1743 |
}
|
1744 |
|
1745 |
if ((masterPtr->fileString == NULL) && (masterPtr->dataString != NULL)
|
1746 |
&& ((masterPtr->dataString != oldData)
|
1747 |
|| (masterPtr->format != oldFormat))) {
|
1748 |
|
1749 |
if (MatchStringFormat(interp, masterPtr->dataString,
|
1750 |
masterPtr->format, &imageFormat, &imageWidth,
|
1751 |
&imageHeight, &oldformat) != TCL_OK) {
|
1752 |
return TCL_ERROR;
|
1753 |
}
|
1754 |
ImgPhotoSetSize(masterPtr, imageWidth, imageHeight);
|
1755 |
tempformat = masterPtr->format;
|
1756 |
tempdata = masterPtr->dataString;
|
1757 |
if (oldformat) {
|
1758 |
if (tempformat) {
|
1759 |
tempformat = (Tcl_Obj *) Tcl_GetString(tempformat);
|
1760 |
}
|
1761 |
tempdata = (Tcl_Obj *) Tcl_GetString(tempdata);
|
1762 |
}
|
1763 |
if ((*imageFormat->stringReadProc)(interp, tempdata,
|
1764 |
tempformat, (Tk_PhotoHandle) masterPtr,
|
1765 |
0, 0, imageWidth, imageHeight, 0, 0) != TCL_OK) {
|
1766 |
return TCL_ERROR;
|
1767 |
}
|
1768 |
|
1769 |
Tcl_ResetResult(interp);
|
1770 |
masterPtr->flags |= IMAGE_CHANGED;
|
1771 |
}
|
1772 |
|
1773 |
/*
|
1774 |
* Enforce a reasonable value for gamma.
|
1775 |
*/
|
1776 |
|
1777 |
if (masterPtr->gamma <= 0) {
|
1778 |
masterPtr->gamma = 1.0;
|
1779 |
}
|
1780 |
|
1781 |
if ((masterPtr->gamma != oldGamma)
|
1782 |
|| (masterPtr->palette != oldPaletteString)) {
|
1783 |
masterPtr->flags |= IMAGE_CHANGED;
|
1784 |
}
|
1785 |
|
1786 |
/*
|
1787 |
* Cycle through all of the instances of this image, regenerating
|
1788 |
* the information for each instance. Then force the image to be
|
1789 |
* redisplayed everywhere that it is used.
|
1790 |
*/
|
1791 |
|
1792 |
for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
|
1793 |
instancePtr = instancePtr->nextPtr) {
|
1794 |
ImgPhotoConfigureInstance(instancePtr);
|
1795 |
}
|
1796 |
|
1797 |
/*
|
1798 |
* Inform the generic image code that the image
|
1799 |
* has (potentially) changed.
|
1800 |
*/
|
1801 |
|
1802 |
Tk_ImageChanged(masterPtr->tkMaster, 0, 0, masterPtr->width,
|
1803 |
masterPtr->height, masterPtr->width, masterPtr->height);
|
1804 |
masterPtr->flags &= ~IMAGE_CHANGED;
|
1805 |
|
1806 |
return TCL_OK;
|
1807 |
}
|
1808 |
|
1809 |
/*
|
1810 |
*----------------------------------------------------------------------
|
1811 |
*
|
1812 |
* ImgPhotoConfigureInstance --
|
1813 |
*
|
1814 |
* This procedure is called to create displaying information for
|
1815 |
* a photo image instance based on the configuration information
|
1816 |
* in the master. It is invoked both when new instances are
|
1817 |
* created and when the master is reconfigured.
|
1818 |
*
|
1819 |
* Results:
|
1820 |
* None.
|
1821 |
*
|
1822 |
* Side effects:
|
1823 |
* Generates errors via Tcl_BackgroundError if there are problems
|
1824 |
* in setting up the instance.
|
1825 |
*
|
1826 |
*----------------------------------------------------------------------
|
1827 |
*/
|
1828 |
|
1829 |
static void
|
1830 |
ImgPhotoConfigureInstance(instancePtr)
|
1831 |
PhotoInstance *instancePtr; /* Instance to reconfigure. */
|
1832 |
{
|
1833 |
PhotoMaster *masterPtr = instancePtr->masterPtr;
|
1834 |
XImage *imagePtr;
|
1835 |
int bitsPerPixel;
|
1836 |
ColorTable *colorTablePtr;
|
1837 |
XRectangle validBox;
|
1838 |
|
1839 |
/*
|
1840 |
* If the -palette configuration option has been set for the master,
|
1841 |
* use the value specified for our palette, but only if it is
|
1842 |
* a valid palette for our windows. Use the gamma value specified
|
1843 |
* the master.
|
1844 |
*/
|
1845 |
|
1846 |
if ((masterPtr->palette && masterPtr->palette[0])
|
1847 |
&& IsValidPalette(instancePtr, masterPtr->palette)) {
|
1848 |
instancePtr->palette = masterPtr->palette;
|
1849 |
} else {
|
1850 |
instancePtr->palette = instancePtr->defaultPalette;
|
1851 |
}
|
1852 |
instancePtr->gamma = masterPtr->gamma;
|
1853 |
|
1854 |
/*
|
1855 |
* If we don't currently have a color table, or if the one we
|
1856 |
* have no longer applies (e.g. because our palette or gamma
|
1857 |
* has changed), get a new one.
|
1858 |
*/
|
1859 |
|
1860 |
colorTablePtr = instancePtr->colorTablePtr;
|
1861 |
if ((colorTablePtr == NULL)
|
1862 |
|| (instancePtr->colormap != colorTablePtr->id.colormap)
|
1863 |
|| (instancePtr->palette != colorTablePtr->id.palette)
|
1864 |
|| (instancePtr->gamma != colorTablePtr->id.gamma)) {
|
1865 |
/*
|
1866 |
* Free up our old color table, and get a new one.
|
1867 |
*/
|
1868 |
|
1869 |
if (colorTablePtr != NULL) {
|
1870 |
colorTablePtr->liveRefCount -= 1;
|
1871 |
FreeColorTable(colorTablePtr, 0);
|
1872 |
}
|
1873 |
GetColorTable(instancePtr);
|
1874 |
|
1875 |
/*
|
1876 |
* Create a new XImage structure for sending data to
|
1877 |
* the X server, if necessary.
|
1878 |
*/
|
1879 |
|
1880 |
if (instancePtr->colorTablePtr->flags & BLACK_AND_WHITE) {
|
1881 |
bitsPerPixel = 1;
|
1882 |
} else {
|
1883 |
bitsPerPixel = instancePtr->visualInfo.depth;
|
1884 |
}
|
1885 |
|
1886 |
if ((instancePtr->imagePtr == NULL)
|
1887 |
|| (instancePtr->imagePtr->bits_per_pixel != bitsPerPixel)) {
|
1888 |
if (instancePtr->imagePtr != NULL) {
|
1889 |
XFree((char *) instancePtr->imagePtr);
|
1890 |
}
|
1891 |
imagePtr = XCreateImage(instancePtr->display,
|
1892 |
instancePtr->visualInfo.visual, (unsigned) bitsPerPixel,
|
1893 |
(bitsPerPixel > 1? ZPixmap: XYBitmap), 0, (char *) NULL,
|
1894 |
1, 1, 32, 0);
|
1895 |
instancePtr->imagePtr = imagePtr;
|
1896 |
|
1897 |
/*
|
1898 |
* Determine the endianness of this machine.
|
1899 |
* We create images using the local host's endianness, rather
|
1900 |
* than the endianness of the server; otherwise we would have
|
1901 |
* to byte-swap any 16 or 32 bit values that we store in the
|
1902 |
* image in those situations where the server's endianness
|
1903 |
* is different from ours.
|
1904 |
*/
|
1905 |
|
1906 |
if (imagePtr != NULL) {
|
1907 |
union {
|
1908 |
int i;
|
1909 |
char c[sizeof(int)];
|
1910 |
} kludge;
|
1911 |
|
1912 |
imagePtr->bitmap_unit = sizeof(pixel) * NBBY;
|
1913 |
kludge.i = 0;
|
1914 |
kludge.c[0] = 1;
|
1915 |
imagePtr->byte_order = (kludge.i == 1) ? LSBFirst : MSBFirst;
|
1916 |
_XInitImageFuncPtrs(imagePtr);
|
1917 |
}
|
1918 |
}
|
1919 |
}
|
1920 |
|
1921 |
/*
|
1922 |
* If the user has specified a width and/or height for the master
|
1923 |
* which is different from our current width/height, set the size
|
1924 |
* to the values specified by the user. If we have no pixmap, we
|
1925 |
* do this also, since it has the side effect of allocating a
|
1926 |
* pixmap for us.
|
1927 |
*/
|
1928 |
|
1929 |
if ((instancePtr->pixels == None) || (instancePtr->error == NULL)
|
1930 |
|| (instancePtr->width != masterPtr->width)
|
1931 |
|| (instancePtr->height != masterPtr->height)) {
|
1932 |
ImgPhotoInstanceSetSize(instancePtr);
|
1933 |
}
|
1934 |
|
1935 |
/*
|
1936 |
* Redither this instance if necessary.
|
1937 |
*/
|
1938 |
|
1939 |
if ((masterPtr->flags & IMAGE_CHANGED)
|
1940 |
|| (instancePtr->colorTablePtr != colorTablePtr)) {
|
1941 |
TkClipBox(masterPtr->validRegion, &validBox);
|
1942 |
if ((validBox.width > 0) && (validBox.height > 0)) {
|
1943 |
DitherInstance(instancePtr, validBox.x, validBox.y,
|
1944 |
validBox.width, validBox.height);
|
1945 |
}
|
1946 |
}
|
1947 |
|
1948 |
}
|
1949 |
|
1950 |
/*
|
1951 |
*----------------------------------------------------------------------
|
1952 |
*
|
1953 |
* ImgPhotoGet --
|
1954 |
*
|
1955 |
* This procedure is called for each use of a photo image in a
|
1956 |
* widget.
|
1957 |
*
|
1958 |
* Results:
|
1959 |
* The return value is a token for the instance, which is passed
|
1960 |
* back to us in calls to ImgPhotoDisplay and ImgPhotoFree.
|
1961 |
*
|
1962 |
* Side effects:
|
1963 |
* A data structure is set up for the instance (or, an existing
|
1964 |
* instance is re-used for the new one).
|
1965 |
*
|
1966 |
*----------------------------------------------------------------------
|
1967 |
*/
|
1968 |
|
1969 |
static ClientData
|
1970 |
ImgPhotoGet(tkwin, masterData)
|
1971 |
Tk_Window tkwin; /* Window in which the instance will be
|
1972 |
* used. */
|
1973 |
ClientData masterData; /* Pointer to our master structure for the
|
1974 |
* image. */
|
1975 |
{
|
1976 |
PhotoMaster *masterPtr = (PhotoMaster *) masterData;
|
1977 |
PhotoInstance *instancePtr;
|
1978 |
Colormap colormap;
|
1979 |
int mono, nRed, nGreen, nBlue;
|
1980 |
XVisualInfo visualInfo, *visInfoPtr;
|
1981 |
XRectangle validBox;
|
1982 |
char buf[TCL_INTEGER_SPACE * 3];
|
1983 |
int numVisuals;
|
1984 |
XColor *white, *black;
|
1985 |
XGCValues gcValues;
|
1986 |
|
1987 |
/*
|
1988 |
* Table of "best" choices for palette for PseudoColor displays
|
1989 |
* with between 3 and 15 bits/pixel.
|
1990 |
*/
|
1991 |
|
1992 |
static int paletteChoice[13][3] = {
|
1993 |
/* #red, #green, #blue */
|
1994 |
{2, 2, 2, /* 3 bits, 8 colors */},
|
1995 |
{2, 3, 2, /* 4 bits, 12 colors */},
|
1996 |
{3, 4, 2, /* 5 bits, 24 colors */},
|
1997 |
{4, 5, 3, /* 6 bits, 60 colors */},
|
1998 |
{5, 6, 4, /* 7 bits, 120 colors */},
|
1999 |
{7, 7, 4, /* 8 bits, 198 colors */},
|
2000 |
{8, 10, 6, /* 9 bits, 480 colors */},
|
2001 |
{10, 12, 8, /* 10 bits, 960 colors */},
|
2002 |
{14, 15, 9, /* 11 bits, 1890 colors */},
|
2003 |
{16, 20, 12, /* 12 bits, 3840 colors */},
|
2004 |
{20, 24, 16, /* 13 bits, 7680 colors */},
|
2005 |
{26, 30, 20, /* 14 bits, 15600 colors */},
|
2006 |
{32, 32, 30, /* 15 bits, 30720 colors */}
|
2007 |
};
|
2008 |
|
2009 |
/*
|
2010 |
* See if there is already an instance for windows using
|
2011 |
* the same colormap. If so then just re-use it.
|
2012 |
*/
|
2013 |
|
2014 |
colormap = Tk_Colormap(tkwin);
|
2015 |
for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
|
2016 |
instancePtr = instancePtr->nextPtr) {
|
2017 |
if ((colormap == instancePtr->colormap)
|
2018 |
&& (Tk_Display(tkwin) == instancePtr->display)) {
|
2019 |
|
2020 |
/*
|
2021 |
* Re-use this instance.
|
2022 |
*/
|
2023 |
|
2024 |
if (instancePtr->refCount == 0) {
|
2025 |
/*
|
2026 |
* We are resurrecting this instance.
|
2027 |
*/
|
2028 |
|
2029 |
Tcl_CancelIdleCall(DisposeInstance, (ClientData) instancePtr);
|
2030 |
if (instancePtr->colorTablePtr != NULL) {
|
2031 |
FreeColorTable(instancePtr->colorTablePtr, 0);
|
2032 |
}
|
2033 |
GetColorTable(instancePtr);
|
2034 |
}
|
2035 |
instancePtr->refCount++;
|
2036 |
return (ClientData) instancePtr;
|
2037 |
}
|
2038 |
}
|
2039 |
|
2040 |
/*
|
2041 |
* The image isn't already in use in a window with the same colormap.
|
2042 |
* Make a new instance of the image.
|
2043 |
*/
|
2044 |
|
2045 |
instancePtr = (PhotoInstance *) ckalloc(sizeof(PhotoInstance));
|
2046 |
instancePtr->masterPtr = masterPtr;
|
2047 |
instancePtr->display = Tk_Display(tkwin);
|
2048 |
instancePtr->colormap = Tk_Colormap(tkwin);
|
2049 |
Tk_PreserveColormap(instancePtr->display, instancePtr->colormap);
|
2050 |
instancePtr->refCount = 1;
|
2051 |
instancePtr->colorTablePtr = NULL;
|
2052 |
instancePtr->pixels = None;
|
2053 |
instancePtr->error = NULL;
|
2054 |
instancePtr->width = 0;
|
2055 |
instancePtr->height = 0;
|
2056 |
instancePtr->imagePtr = 0;
|
2057 |
instancePtr->nextPtr = masterPtr->instancePtr;
|
2058 |
masterPtr->instancePtr = instancePtr;
|
2059 |
|
2060 |
/*
|
2061 |
* Obtain information about the visual and decide on the
|
2062 |
* default palette.
|
2063 |
*/
|
2064 |
|
2065 |
visualInfo.screen = Tk_ScreenNumber(tkwin);
|
2066 |
visualInfo.visualid = XVisualIDFromVisual(Tk_Visual(tkwin));
|
2067 |
visInfoPtr = XGetVisualInfo(Tk_Display(tkwin),
|
2068 |
VisualScreenMask | VisualIDMask, &visualInfo, &numVisuals);
|
2069 |
nRed = 2;
|
2070 |
nGreen = nBlue = 0;
|
2071 |
mono = 1;
|
2072 |
if (visInfoPtr != NULL) {
|
2073 |
instancePtr->visualInfo = *visInfoPtr;
|
2074 |
switch (visInfoPtr->class) {
|
2075 |
case DirectColor:
|
2076 |
case TrueColor:
|
2077 |
nRed = 1 << CountBits(visInfoPtr->red_mask);
|
2078 |
nGreen = 1 << CountBits(visInfoPtr->green_mask);
|
2079 |
nBlue = 1 << CountBits(visInfoPtr->blue_mask);
|
2080 |
mono = 0;
|
2081 |
break;
|
2082 |
case PseudoColor:
|
2083 |
case StaticColor:
|
2084 |
if (visInfoPtr->depth > 15) {
|
2085 |
nRed = 32;
|
2086 |
nGreen = 32;
|
2087 |
nBlue = 32;
|
2088 |
mono = 0;
|
2089 |
} else if (visInfoPtr->depth >= 3) {
|
2090 |
int *ip = paletteChoice[visInfoPtr->depth - 3];
|
2091 |
|
2092 |
nRed = ip[0];
|
2093 |
nGreen = ip[1];
|
2094 |
nBlue = ip[2];
|
2095 |
mono = 0;
|
2096 |
}
|
2097 |
break;
|
2098 |
case GrayScale:
|
2099 |
case StaticGray:
|
2100 |
nRed = 1 << visInfoPtr->depth;
|
2101 |
break;
|
2102 |
}
|
2103 |
XFree((char *) visInfoPtr);
|
2104 |
|
2105 |
} else {
|
2106 |
panic("ImgPhotoGet couldn't find visual for window");
|
2107 |
}
|
2108 |
|
2109 |
sprintf(buf, ((mono) ? "%d": "%d/%d/%d"), nRed, nGreen, nBlue);
|
2110 |
instancePtr->defaultPalette = Tk_GetUid(buf);
|
2111 |
|
2112 |
/*
|
2113 |
* Make a GC with background = black and foreground = white.
|
2114 |
*/
|
2115 |
|
2116 |
white = Tk_GetColor(masterPtr->interp, tkwin, "white");
|
2117 |
black = Tk_GetColor(masterPtr->interp, tkwin, "black");
|
2118 |
gcValues.foreground = (white != NULL)? white->pixel:
|
2119 |
WhitePixelOfScreen(Tk_Screen(tkwin));
|
2120 |
gcValues.background = (black != NULL)? black->pixel:
|
2121 |
BlackPixelOfScreen(Tk_Screen(tkwin));
|
2122 |
gcValues.graphics_exposures = False;
|
2123 |
instancePtr->gc = Tk_GetGC(tkwin,
|
2124 |
GCForeground|GCBackground|GCGraphicsExposures, &gcValues);
|
2125 |
|
2126 |
/*
|
2127 |
* Set configuration options and finish the initialization of the instance.
|
2128 |
*/
|
2129 |
|
2130 |
ImgPhotoConfigureInstance(instancePtr);
|
2131 |
|
2132 |
/*
|
2133 |
* If this is the first instance, must set the size of the image.
|
2134 |
*/
|
2135 |
|
2136 |
if (instancePtr->nextPtr == NULL) {
|
2137 |
Tk_ImageChanged(masterPtr->tkMaster, 0, 0, 0, 0,
|
2138 |
masterPtr->width, masterPtr->height);
|
2139 |
}
|
2140 |
|
2141 |
/*
|
2142 |
* Dither the image to fill in this instance's pixmap.
|
2143 |
*/
|
2144 |
|
2145 |
TkClipBox(masterPtr->validRegion, &validBox);
|
2146 |
if ((validBox.width > 0) && (validBox.height > 0)) {
|
2147 |
DitherInstance(instancePtr, validBox.x, validBox.y, validBox.width,
|
2148 |
validBox.height);
|
2149 |
}
|
2150 |
|
2151 |
return (ClientData) instancePtr;
|
2152 |
}
|
2153 |
|
2154 |
/*
|
2155 |
*----------------------------------------------------------------------
|
2156 |
*
|
2157 |
* ImgPhotoDisplay --
|
2158 |
*
|
2159 |
* This procedure is invoked to draw a photo image.
|
2160 |
*
|
2161 |
* Results:
|
2162 |
* None.
|
2163 |
*
|
2164 |
* Side effects:
|
2165 |
* A portion of the image gets rendered in a pixmap or window.
|
2166 |
*
|
2167 |
*----------------------------------------------------------------------
|
2168 |
*/
|
2169 |
|
2170 |
static void
|
2171 |
ImgPhotoDisplay(clientData, display, drawable, imageX, imageY, width,
|
2172 |
height, drawableX, drawableY)
|
2173 |
ClientData clientData; /* Pointer to PhotoInstance structure for
|
2174 |
* for instance to be displayed. */
|
2175 |
Display *display; /* Display on which to draw image. */
|
2176 |
Drawable drawable; /* Pixmap or window in which to draw image. */
|
2177 |
int imageX, imageY; /* Upper-left corner of region within image
|
2178 |
* to draw. */
|
2179 |
int width, height; /* Dimensions of region within image to draw. */
|
2180 |
int drawableX, drawableY; /* Coordinates within drawable that
|
2181 |
* correspond to imageX and imageY. */
|
2182 |
{
|
2183 |
PhotoInstance *instancePtr = (PhotoInstance *) clientData;
|
2184 |
|
2185 |
/*
|
2186 |
* If there's no pixmap, it means that an error occurred
|
2187 |
* while creating the image instance so it can't be displayed.
|
2188 |
*/
|
2189 |
|
2190 |
if (instancePtr->pixels == None) {
|
2191 |
return;
|
2192 |
}
|
2193 |
|
2194 |
/*
|
2195 |
* masterPtr->region describes which parts of the image contain
|
2196 |
* valid data. We set this region as the clip mask for the gc,
|
2197 |
* setting its origin appropriately, and use it when drawing the
|
2198 |
* image.
|
2199 |
*/
|
2200 |
|
2201 |
TkSetRegion(display, instancePtr->gc, instancePtr->masterPtr->validRegion);
|
2202 |
XSetClipOrigin(display, instancePtr->gc, drawableX - imageX,
|
2203 |
drawableY - imageY);
|
2204 |
XCopyArea(display, instancePtr->pixels, drawable, instancePtr->gc,
|
2205 |
imageX, imageY, (unsigned) width, (unsigned) height,
|
2206 |
drawableX, drawableY);
|
2207 |
XSetClipMask(display, instancePtr->gc, None);
|
2208 |
XSetClipOrigin(display, instancePtr->gc, 0, 0);
|
2209 |
}
|
2210 |
|
2211 |
/*
|
2212 |
*----------------------------------------------------------------------
|
2213 |
*
|
2214 |
* ImgPhotoFree --
|
2215 |
*
|
2216 |
* This procedure is called when a widget ceases to use a
|
2217 |
* particular instance of an image. We don't actually get
|
2218 |
* rid of the instance until later because we may be about
|
2219 |
* to get this instance again.
|
2220 |
*
|
2221 |
* Results:
|
2222 |
* None.
|
2223 |
*
|
2224 |
* Side effects:
|
2225 |
* Internal data structures get cleaned up, later.
|
2226 |
*
|
2227 |
*----------------------------------------------------------------------
|
2228 |
*/
|
2229 |
|
2230 |
static void
|
2231 |
ImgPhotoFree(clientData, display)
|
2232 |
ClientData clientData; /* Pointer to PhotoInstance structure for
|
2233 |
* for instance to be displayed. */
|
2234 |
Display *display; /* Display containing window that used image. */
|
2235 |
{
|
2236 |
PhotoInstance *instancePtr = (PhotoInstance *) clientData;
|
2237 |
ColorTable *colorPtr;
|
2238 |
|
2239 |
instancePtr->refCount -= 1;
|
2240 |
if (instancePtr->refCount > 0) {
|
2241 |
return;
|
2242 |
}
|
2243 |
|
2244 |
/*
|
2245 |
* There are no more uses of the image within this widget.
|
2246 |
* Decrement the count of live uses of its color table, so
|
2247 |
* that its colors can be reclaimed if necessary, and
|
2248 |
* set up an idle call to free the instance structure.
|
2249 |
*/
|
2250 |
|
2251 |
colorPtr = instancePtr->colorTablePtr;
|
2252 |
if (colorPtr != NULL) {
|
2253 |
colorPtr->liveRefCount -= 1;
|
2254 |
}
|
2255 |
|
2256 |
Tcl_DoWhenIdle(DisposeInstance, (ClientData) instancePtr);
|
2257 |
}
|
2258 |
|
2259 |
/*
|
2260 |
*----------------------------------------------------------------------
|
2261 |
*
|
2262 |
* ImgPhotoDelete --
|
2263 |
*
|
2264 |
* This procedure is called by the image code to delete the
|
2265 |
* master structure for an image.
|
2266 |
*
|
2267 |
* Results:
|
2268 |
* None.
|
2269 |
*
|
2270 |
* Side effects:
|
2271 |
* Resources associated with the image get freed.
|
2272 |
*
|
2273 |
*----------------------------------------------------------------------
|
2274 |
*/
|
2275 |
|
2276 |
static void
|
2277 |
ImgPhotoDelete(masterData)
|
2278 |
ClientData masterData; /* Pointer to PhotoMaster structure for
|
2279 |
* image. Must not have any more instances. */
|
2280 |
{
|
2281 |
PhotoMaster *masterPtr = (PhotoMaster *) masterData;
|
2282 |
PhotoInstance *instancePtr;
|
2283 |
|
2284 |
while ((instancePtr = masterPtr->instancePtr) != NULL) {
|
2285 |
if (instancePtr->refCount > 0) {
|
2286 |
panic("tried to delete photo image when instances still exist");
|
2287 |
}
|
2288 |
Tcl_CancelIdleCall(DisposeInstance, (ClientData) instancePtr);
|
2289 |
DisposeInstance((ClientData) instancePtr);
|
2290 |
}
|
2291 |
masterPtr->tkMaster = NULL;
|
2292 |
if (masterPtr->imageCmd != NULL) {
|
2293 |
Tcl_DeleteCommandFromToken(masterPtr->interp, masterPtr->imageCmd);
|
2294 |
}
|
2295 |
if (masterPtr->pix24 != NULL) {
|
2296 |
ckfree((char *) masterPtr->pix24);
|
2297 |
}
|
2298 |
if (masterPtr->validRegion != NULL) {
|
2299 |
TkDestroyRegion(masterPtr->validRegion);
|
2300 |
}
|
2301 |
if (masterPtr->dataString != NULL) {
|
2302 |
Tcl_DecrRefCount(masterPtr->dataString);
|
2303 |
}
|
2304 |
if (masterPtr->format != NULL) {
|
2305 |
Tcl_DecrRefCount(masterPtr->format);
|
2306 |
}
|
2307 |
Tk_FreeOptions(configSpecs, (char *) masterPtr, (Display *) NULL, 0);
|
2308 |
ckfree((char *) masterPtr);
|
2309 |
}
|
2310 |
|
2311 |
/*
|
2312 |
*----------------------------------------------------------------------
|
2313 |
*
|
2314 |
* ImgPhotoCmdDeletedProc --
|
2315 |
*
|
2316 |
* This procedure is invoked when the image command for an image
|
2317 |
* is deleted. It deletes the image.
|
2318 |
*
|
2319 |
* Results:
|
2320 |
* None.
|
2321 |
*
|
2322 |
* Side effects:
|
2323 |
* The image is deleted.
|
2324 |
*
|
2325 |
*----------------------------------------------------------------------
|
2326 |
*/
|
2327 |
|
2328 |
static void
|
2329 |
ImgPhotoCmdDeletedProc(clientData)
|
2330 |
ClientData clientData; /* Pointer to PhotoMaster structure for
|
2331 |
* image. */
|
2332 |
{
|
2333 |
PhotoMaster *masterPtr = (PhotoMaster *) clientData;
|
2334 |
|
2335 |
masterPtr->imageCmd = NULL;
|
2336 |
if (masterPtr->tkMaster != NULL) {
|
2337 |
Tk_DeleteImage(masterPtr->interp, Tk_NameOfImage(masterPtr->tkMaster));
|
2338 |
}
|
2339 |
}
|
2340 |
|
2341 |
/*
|
2342 |
*----------------------------------------------------------------------
|
2343 |
*
|
2344 |
* ImgPhotoSetSize --
|
2345 |
*
|
2346 |
* This procedure reallocates the image storage and instance
|
2347 |
* pixmaps for a photo image, as necessary, to change the
|
2348 |
* image's size to `width' x `height' pixels.
|
2349 |
*
|
2350 |
* Results:
|
2351 |
* None.
|
2352 |
*
|
2353 |
* Side effects:
|
2354 |
* Storage gets reallocated, for the master and all its instances.
|
2355 |
*
|
2356 |
*----------------------------------------------------------------------
|
2357 |
*/
|
2358 |
|
2359 |
static void
|
2360 |
ImgPhotoSetSize(masterPtr, width, height)
|
2361 |
PhotoMaster *masterPtr;
|
2362 |
int width, height;
|
2363 |
{
|
2364 |
unsigned char *newPix24;
|
2365 |
int h, offset, pitch;
|
2366 |
unsigned char *srcPtr, *destPtr;
|
2367 |
XRectangle validBox, clipBox;
|
2368 |
TkRegion clipRegion;
|
2369 |
PhotoInstance *instancePtr;
|
2370 |
|
2371 |
if (masterPtr->userWidth > 0) {
|
2372 |
width = masterPtr->userWidth;
|
2373 |
}
|
2374 |
if (masterPtr->userHeight > 0) {
|
2375 |
height = masterPtr->userHeight;
|
2376 |
}
|
2377 |
|
2378 |
/*
|
2379 |
* We have to trim the valid region if it is currently
|
2380 |
* larger than the new image size.
|
2381 |
*/
|
2382 |
|
2383 |
TkClipBox(masterPtr->validRegion, &validBox);
|
2384 |
if ((validBox.x + validBox.width > width)
|
2385 |
|| (validBox.y + validBox.height > height)) {
|
2386 |
clipBox.x = 0;
|
2387 |
clipBox.y = 0;
|
2388 |
clipBox.width = width;
|
2389 |
clipBox.height = height;
|
2390 |
clipRegion = TkCreateRegion();
|
2391 |
TkUnionRectWithRegion(&clipBox, clipRegion, clipRegion);
|
2392 |
TkIntersectRegion(masterPtr->validRegion, clipRegion,
|
2393 |
masterPtr->validRegion);
|
2394 |
TkDestroyRegion(clipRegion);
|
2395 |
TkClipBox(masterPtr->validRegion, &validBox);
|
2396 |
}
|
2397 |
|
2398 |
if ((width != masterPtr->width) || (height != masterPtr->height)
|
2399 |
|| (masterPtr->pix24 == NULL)) {
|
2400 |
|
2401 |
/*
|
2402 |
* Reallocate storage for the 24-bit image and copy
|
2403 |
* over valid regions.
|
2404 |
*/
|
2405 |
|
2406 |
pitch = width * 4;
|
2407 |
newPix24 = (unsigned char *) ckalloc((unsigned) (height * pitch));
|
2408 |
|
2409 |
/*
|
2410 |
* Zero the new array. The dithering code shouldn't read the
|
2411 |
* areas outside validBox, but they might be copied to another
|
2412 |
* photo image or written to a file.
|
2413 |
*/
|
2414 |
|
2415 |
if ((masterPtr->pix24 != NULL)
|
2416 |
&& ((width == masterPtr->width) || (width == validBox.width))) {
|
2417 |
if (validBox.y > 0) {
|
2418 |
memset((VOID *) newPix24, 0, (size_t) (validBox.y * pitch));
|
2419 |
}
|
2420 |
h = validBox.y + validBox.height;
|
2421 |
if (h < height) {
|
2422 |
memset((VOID *) (newPix24 + h * pitch), 0,
|
2423 |
(size_t) ((height - h) * pitch));
|
2424 |
}
|
2425 |
} else {
|
2426 |
memset((VOID *) newPix24, 0, (size_t) (height * pitch));
|
2427 |
}
|
2428 |
|
2429 |
if (masterPtr->pix24 != NULL) {
|
2430 |
|
2431 |
/*
|
2432 |
* Copy the common area over to the new array array and
|
2433 |
* free the old array.
|
2434 |
*/
|
2435 |
|
2436 |
if (width == masterPtr->width) {
|
2437 |
|
2438 |
/*
|
2439 |
* The region to be copied is contiguous.
|
2440 |
*/
|
2441 |
|
2442 |
offset = validBox.y * pitch;
|
2443 |
memcpy((VOID *) (newPix24 + offset),
|
2444 |
(VOID *) (masterPtr->pix24 + offset),
|
2445 |
(size_t) (validBox.height * pitch));
|
2446 |
|
2447 |
} else if ((validBox.width > 0) && (validBox.height > 0)) {
|
2448 |
|
2449 |
/*
|
2450 |
* Area to be copied is not contiguous - copy line by line.
|
2451 |
*/
|
2452 |
|
2453 |
destPtr = newPix24 + (validBox.y * width + validBox.x) * 4;
|
2454 |
srcPtr = masterPtr->pix24 + (validBox.y * masterPtr->width
|
2455 |
+ validBox.x) * 4;
|
2456 |
for (h = validBox.height; h > 0; h--) {
|
2457 |
memcpy((VOID *) destPtr, (VOID *) srcPtr,
|
2458 |
(size_t) (validBox.width * 4));
|
2459 |
destPtr += width * 4;
|
2460 |
srcPtr += masterPtr->width * 4;
|
2461 |
}
|
2462 |
}
|
2463 |
|
2464 |
ckfree((char *) masterPtr->pix24);
|
2465 |
}
|
2466 |
|
2467 |
masterPtr->pix24 = newPix24;
|
2468 |
masterPtr->width = width;
|
2469 |
masterPtr->height = height;
|
2470 |
|
2471 |
/*
|
2472 |
* Dithering will be correct up to the end of the last
|
2473 |
* pre-existing complete scanline.
|
2474 |
*/
|
2475 |
|
2476 |
if ((validBox.x > 0) || (validBox.y > 0)) {
|
2477 |
masterPtr->ditherX = 0;
|
2478 |
masterPtr->ditherY = 0;
|
2479 |
} else if (validBox.width == width) {
|
2480 |
if ((int) validBox.height < masterPtr->ditherY) {
|
2481 |
masterPtr->ditherX = 0;
|
2482 |
masterPtr->ditherY = validBox.height;
|
2483 |
}
|
2484 |
} else {
|
2485 |
if ((masterPtr->ditherY > 0)
|
2486 |
|| ((int) validBox.width < masterPtr->ditherX)) {
|
2487 |
masterPtr->ditherX = validBox.width;
|
2488 |
masterPtr->ditherY = 0;
|
2489 |
}
|
2490 |
}
|
2491 |
}
|
2492 |
|
2493 |
/*
|
2494 |
* Now adjust the sizes of the pixmaps for all of the instances.
|
2495 |
*/
|
2496 |
|
2497 |
for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
|
2498 |
instancePtr = instancePtr->nextPtr) {
|
2499 |
ImgPhotoInstanceSetSize(instancePtr);
|
2500 |
}
|
2501 |
}
|
2502 |
|
2503 |
/*
|
2504 |
*----------------------------------------------------------------------
|
2505 |
*
|
2506 |
* ImgPhotoInstanceSetSize --
|
2507 |
*
|
2508 |
* This procedure reallocates the instance pixmap and dithering
|
2509 |
* error array for a photo instance, as necessary, to change the
|
2510 |
* image's size to `width' x `height' pixels.
|
2511 |
*
|
2512 |
* Results:
|
2513 |
* None.
|
2514 |
*
|
2515 |
* Side effects:
|
2516 |
* Storage gets reallocated, here and in the X server.
|
2517 |
*
|
2518 |
*----------------------------------------------------------------------
|
2519 |
*/
|
2520 |
|
2521 |
static void
|
2522 |
ImgPhotoInstanceSetSize(instancePtr)
|
2523 |
PhotoInstance *instancePtr; /* Instance whose size is to be
|
2524 |
* changed. */
|
2525 |
{
|
2526 |
PhotoMaster *masterPtr;
|
2527 |
schar *newError;
|
2528 |
schar *errSrcPtr, *errDestPtr;
|
2529 |
int h, offset;
|
2530 |
XRectangle validBox;
|
2531 |
Pixmap newPixmap;
|
2532 |
|
2533 |
masterPtr = instancePtr->masterPtr;
|
2534 |
TkClipBox(masterPtr->validRegion, &validBox);
|
2535 |
|
2536 |
if ((instancePtr->width != masterPtr->width)
|
2537 |
|| (instancePtr->height != masterPtr->height)
|
2538 |
|| (instancePtr->pixels == None)) {
|
2539 |
newPixmap = Tk_GetPixmap(instancePtr->display,
|
2540 |
RootWindow(instancePtr->display,
|
2541 |
instancePtr->visualInfo.screen),
|
2542 |
(masterPtr->width > 0) ? masterPtr->width: 1,
|
2543 |
(masterPtr->height > 0) ? masterPtr->height: 1,
|
2544 |
instancePtr->visualInfo.depth);
|
2545 |
|
2546 |
/*
|
2547 |
* The following is a gross hack needed to properly support colormaps
|
2548 |
* under Windows. Before the pixels can be copied to the pixmap,
|
2549 |
* the relevent colormap must be associated with the drawable.
|
2550 |
* Normally we can infer this association from the window that
|
2551 |
* was used to create the pixmap. However, in this case we're
|
2552 |
* using the root window, so we have to be more explicit.
|
2553 |
*/
|
2554 |
|
2555 |
TkSetPixmapColormap(newPixmap, instancePtr->colormap);
|
2556 |
|
2557 |
if (instancePtr->pixels != None) {
|
2558 |
/*
|
2559 |
* Copy any common pixels from the old pixmap and free it.
|
2560 |
*/
|
2561 |
XCopyArea(instancePtr->display, instancePtr->pixels, newPixmap,
|
2562 |
instancePtr->gc, validBox.x, validBox.y,
|
2563 |
validBox.width, validBox.height, validBox.x, validBox.y);
|
2564 |
Tk_FreePixmap(instancePtr->display, instancePtr->pixels);
|
2565 |
}
|
2566 |
instancePtr->pixels = newPixmap;
|
2567 |
}
|
2568 |
|
2569 |
if ((instancePtr->width != masterPtr->width)
|
2570 |
|| (instancePtr->height != masterPtr->height)
|
2571 |
|| (instancePtr->error == NULL)) {
|
2572 |
|
2573 |
newError = (schar *) ckalloc((unsigned)
|
2574 |
(masterPtr->height * masterPtr->width * 3 * sizeof(schar)));
|
2575 |
|
2576 |
/*
|
2577 |
* Zero the new array so that we don't get bogus error values
|
2578 |
* propagating into areas we dither later.
|
2579 |
*/
|
2580 |
|
2581 |
if ((instancePtr->error != NULL)
|
2582 |
&& ((instancePtr->width == masterPtr->width)
|
2583 |
|| (validBox.width == masterPtr->width))) {
|
2584 |
if (validBox.y > 0) {
|
2585 |
memset((VOID *) newError, 0, (size_t)
|
2586 |
(validBox.y * masterPtr->width * 3 * sizeof(schar)));
|
2587 |
}
|
2588 |
h = validBox.y + validBox.height;
|
2589 |
if (h < masterPtr->height) {
|
2590 |
memset((VOID *) (newError + h * masterPtr->width * 3), 0,
|
2591 |
(size_t) ((masterPtr->height - h)
|
2592 |
* masterPtr->width * 3 * sizeof(schar)));
|
2593 |
}
|
2594 |
} else {
|
2595 |
memset((VOID *) newError, 0, (size_t)
|
2596 |
(masterPtr->height * masterPtr->width * 3 * sizeof(schar)));
|
2597 |
}
|
2598 |
|
2599 |
if (instancePtr->error != NULL) {
|
2600 |
|
2601 |
/*
|
2602 |
* Copy the common area over to the new array
|
2603 |
* and free the old array.
|
2604 |
*/
|
2605 |
|
2606 |
if (masterPtr->width == instancePtr->width) {
|
2607 |
|
2608 |
offset = validBox.y * masterPtr->width * 3;
|
2609 |
memcpy((VOID *) (newError + offset),
|
2610 |
(VOID *) (instancePtr->error + offset),
|
2611 |
(size_t) (validBox.height
|
2612 |
* masterPtr->width * 3 * sizeof(schar)));
|
2613 |
|
2614 |
} else if (validBox.width > 0 && validBox.height > 0) {
|
2615 |
|
2616 |
errDestPtr = newError
|
2617 |
+ (validBox.y * masterPtr->width + validBox.x) * 3;
|
2618 |
errSrcPtr = instancePtr->error
|
2619 |
+ (validBox.y * instancePtr->width + validBox.x) * 3;
|
2620 |
for (h = validBox.height; h > 0; --h) {
|
2621 |
memcpy((VOID *) errDestPtr, (VOID *) errSrcPtr,
|
2622 |
validBox.width * 3 * sizeof(schar));
|
2623 |
errDestPtr += masterPtr->width * 3;
|
2624 |
errSrcPtr += instancePtr->width * 3;
|
2625 |
}
|
2626 |
}
|
2627 |
ckfree((char *) instancePtr->error);
|
2628 |
}
|
2629 |
|
2630 |
instancePtr->error = newError;
|
2631 |
}
|
2632 |
|
2633 |
instancePtr->width = masterPtr->width;
|
2634 |
instancePtr->height = masterPtr->height;
|
2635 |
}
|
2636 |
|
2637 |
/*
|
2638 |
*----------------------------------------------------------------------
|
2639 |
*
|
2640 |
* IsValidPalette --
|
2641 |
*
|
2642 |
* This procedure is called to check whether a value given for
|
2643 |
* the -palette option is valid for a particular instance
|
2644 |
* of a photo image.
|
2645 |
*
|
2646 |
* Results:
|
2647 |
* A boolean value: 1 if the palette is acceptable, 0 otherwise.
|
2648 |
*
|
2649 |
* Side effects:
|
2650 |
* None.
|
2651 |
*
|
2652 |
*----------------------------------------------------------------------
|
2653 |
*/
|
2654 |
|
2655 |
static int
|
2656 |
IsValidPalette(instancePtr, palette)
|
2657 |
PhotoInstance *instancePtr; /* Instance to which the palette
|
2658 |
* specification is to be applied. */
|
2659 |
char *palette; /* Palette specification string. */
|
2660 |
{
|
2661 |
int nRed, nGreen, nBlue, mono, numColors;
|
2662 |
char *endp;
|
2663 |
|
2664 |
/*
|
2665 |
* First parse the specification: it must be of the form
|
2666 |
* %d or %d/%d/%d.
|
2667 |
*/
|
2668 |
|
2669 |
nRed = strtol(palette, &endp, 10);
|
2670 |
if ((endp == palette) || ((*endp != 0) && (*endp != '/'))
|
2671 |
|| (nRed < 2) || (nRed > 256)) {
|
2672 |
return 0;
|
2673 |
}
|
2674 |
|
2675 |
if (*endp == 0) {
|
2676 |
mono = 1;
|
2677 |
nGreen = nBlue = nRed;
|
2678 |
} else {
|
2679 |
palette = endp + 1;
|
2680 |
nGreen = strtol(palette, &endp, 10);
|
2681 |
if ((endp == palette) || (*endp != '/') || (nGreen < 2)
|
2682 |
|| (nGreen > 256)) {
|
2683 |
return 0;
|
2684 |
}
|
2685 |
palette = endp + 1;
|
2686 |
nBlue = strtol(palette, &endp, 10);
|
2687 |
if ((endp == palette) || (*endp != 0) || (nBlue < 2)
|
2688 |
|| (nBlue > 256)) {
|
2689 |
return 0;
|
2690 |
}
|
2691 |
mono = 0;
|
2692 |
}
|
2693 |
|
2694 |
switch (instancePtr->visualInfo.class) {
|
2695 |
case DirectColor:
|
2696 |
case TrueColor:
|
2697 |
if ((nRed > (1 << CountBits(instancePtr->visualInfo.red_mask)))
|
2698 |
|| (nGreen > (1
|
2699 |
<< CountBits(instancePtr->visualInfo.green_mask)))
|
2700 |
|| (nBlue > (1
|
2701 |
<< CountBits(instancePtr->visualInfo.blue_mask)))) {
|
2702 |
return 0;
|
2703 |
}
|
2704 |
break;
|
2705 |
case PseudoColor:
|
2706 |
case StaticColor:
|
2707 |
numColors = nRed;
|
2708 |
if (!mono) {
|
2709 |
numColors *= nGreen*nBlue;
|
2710 |
}
|
2711 |
if (numColors > (1 << instancePtr->visualInfo.depth)) {
|
2712 |
return 0;
|
2713 |
}
|
2714 |
break;
|
2715 |
case GrayScale:
|
2716 |
case StaticGray:
|
2717 |
if (!mono || (nRed > (1 << instancePtr->visualInfo.depth))) {
|
2718 |
return 0;
|
2719 |
}
|
2720 |
break;
|
2721 |
}
|
2722 |
|
2723 |
return 1;
|
2724 |
}
|
2725 |
|
2726 |
/*
|
2727 |
*----------------------------------------------------------------------
|
2728 |
*
|
2729 |
* CountBits --
|
2730 |
*
|
2731 |
* This procedure counts how many bits are set to 1 in `mask'.
|
2732 |
*
|
2733 |
* Results:
|
2734 |
* The integer number of bits.
|
2735 |
*
|
2736 |
* Side effects:
|
2737 |
* None.
|
2738 |
*
|
2739 |
*----------------------------------------------------------------------
|
2740 |
*/
|
2741 |
|
2742 |
static int
|
2743 |
CountBits(mask)
|
2744 |
pixel mask; /* Value to count the 1 bits in. */
|
2745 |
{
|
2746 |
int n;
|
2747 |
|
2748 |
for( n = 0; mask != 0; mask &= mask - 1 )
|
2749 |
n++;
|
2750 |
return n;
|
2751 |
}
|
2752 |
|
2753 |
/*
|
2754 |
*----------------------------------------------------------------------
|
2755 |
*
|
2756 |
* GetColorTable --
|
2757 |
*
|
2758 |
* This procedure is called to allocate a table of colormap
|
2759 |
* information for an instance of a photo image. Only one such
|
2760 |
* table is allocated for all photo instances using the same
|
2761 |
* display, colormap, palette and gamma values, so that the
|
2762 |
* application need only request a set of colors from the X
|
2763 |
* server once for all such photo widgets. This procedure
|
2764 |
* maintains a hash table to find previously-allocated
|
2765 |
* ColorTables.
|
2766 |
*
|
2767 |
* Results:
|
2768 |
* None.
|
2769 |
*
|
2770 |
* Side effects:
|
2771 |
* A new ColorTable may be allocated and placed in the hash
|
2772 |
* table, and have colors allocated for it.
|
2773 |
*
|
2774 |
*----------------------------------------------------------------------
|
2775 |
*/
|
2776 |
|
2777 |
static void
|
2778 |
GetColorTable(instancePtr)
|
2779 |
PhotoInstance *instancePtr; /* Instance needing a color table. */
|
2780 |
{
|
2781 |
ColorTable *colorPtr;
|
2782 |
Tcl_HashEntry *entry;
|
2783 |
ColorTableId id;
|
2784 |
int isNew;
|
2785 |
|
2786 |
/*
|
2787 |
* Look for an existing ColorTable in the hash table.
|
2788 |
*/
|
2789 |
|
2790 |
memset((VOID *) &id, 0, sizeof(id));
|
2791 |
id.display = instancePtr->display;
|
2792 |
id.colormap = instancePtr->colormap;
|
2793 |
id.palette = instancePtr->palette;
|
2794 |
id.gamma = instancePtr->gamma;
|
2795 |
if (!imgPhotoColorHashInitialized) {
|
2796 |
Tcl_InitHashTable(&imgPhotoColorHash, N_COLOR_HASH);
|
2797 |
imgPhotoColorHashInitialized = 1;
|
2798 |
}
|
2799 |
entry = Tcl_CreateHashEntry(&imgPhotoColorHash, (char *) &id, &isNew);
|
2800 |
|
2801 |
if (!isNew) {
|
2802 |
/*
|
2803 |
* Re-use the existing entry.
|
2804 |
*/
|
2805 |
|
2806 |
colorPtr = (ColorTable *) Tcl_GetHashValue(entry);
|
2807 |
|
2808 |
} else {
|
2809 |
/*
|
2810 |
* No color table currently available; need to make one.
|
2811 |
*/
|
2812 |
|
2813 |
colorPtr = (ColorTable *) ckalloc(sizeof(ColorTable));
|
2814 |
|
2815 |
/*
|
2816 |
* The following line of code should not normally be needed due
|
2817 |
* to the assignment in the following line. However, it compensates
|
2818 |
* for bugs in some compilers (HP, for example) where
|
2819 |
* sizeof(ColorTable) is 24 but the assignment only copies 20 bytes,
|
2820 |
* leaving 4 bytes uninitialized; these cause problems when using
|
2821 |
* the id for lookups in imgPhotoColorHash, and can result in
|
2822 |
* core dumps.
|
2823 |
*/
|
2824 |
|
2825 |
memset((VOID *) &colorPtr->id, 0, sizeof(ColorTableId));
|
2826 |
colorPtr->id = id;
|
2827 |
Tk_PreserveColormap(colorPtr->id.display, colorPtr->id.colormap);
|
2828 |
colorPtr->flags = 0;
|
2829 |
colorPtr->refCount = 0;
|
2830 |
colorPtr->liveRefCount = 0;
|
2831 |
colorPtr->numColors = 0;
|
2832 |
colorPtr->visualInfo = instancePtr->visualInfo;
|
2833 |
colorPtr->pixelMap = NULL;
|
2834 |
Tcl_SetHashValue(entry, colorPtr);
|
2835 |
}
|
2836 |
|
2837 |
colorPtr->refCount++;
|
2838 |
colorPtr->liveRefCount++;
|
2839 |
instancePtr->colorTablePtr = colorPtr;
|
2840 |
if (colorPtr->flags & DISPOSE_PENDING) {
|
2841 |
Tcl_CancelIdleCall(DisposeColorTable, (ClientData) colorPtr);
|
2842 |
colorPtr->flags &= ~DISPOSE_PENDING;
|
2843 |
}
|
2844 |
|
2845 |
/*
|
2846 |
* Allocate colors for this color table if necessary.
|
2847 |
*/
|
2848 |
|
2849 |
if ((colorPtr->numColors == 0)
|
2850 |
&& ((colorPtr->flags & BLACK_AND_WHITE) == 0)) {
|
2851 |
AllocateColors(colorPtr);
|
2852 |
}
|
2853 |
}
|
2854 |
|
2855 |
/*
|
2856 |
*----------------------------------------------------------------------
|
2857 |
*
|
2858 |
* FreeColorTable --
|
2859 |
*
|
2860 |
* This procedure is called when an instance ceases using a
|
2861 |
* color table.
|
2862 |
*
|
2863 |
* Results:
|
2864 |
* None.
|
2865 |
*
|
2866 |
* Side effects:
|
2867 |
* If no other instances are using this color table, a when-idle
|
2868 |
* handler is registered to free up the color table and the colors
|
2869 |
* allocated for it.
|
2870 |
*
|
2871 |
*----------------------------------------------------------------------
|
2872 |
*/
|
2873 |
|
2874 |
static void
|
2875 |
FreeColorTable(colorPtr, force)
|
2876 |
ColorTable *colorPtr; /* Pointer to the color table which is
|
2877 |
* no longer required by an instance. */
|
2878 |
int force; /* Force free to happen immediately. */
|
2879 |
{
|
2880 |
colorPtr->refCount--;
|
2881 |
if (colorPtr->refCount > 0) {
|
2882 |
return;
|
2883 |
}
|
2884 |
if (force) {
|
2885 |
if ((colorPtr->flags & DISPOSE_PENDING) != 0) {
|
2886 |
Tcl_CancelIdleCall(DisposeColorTable, (ClientData) colorPtr);
|
2887 |
colorPtr->flags &= ~DISPOSE_PENDING;
|
2888 |
}
|
2889 |
DisposeColorTable((ClientData) colorPtr);
|
2890 |
} else if ((colorPtr->flags & DISPOSE_PENDING) == 0) {
|
2891 |
Tcl_DoWhenIdle(DisposeColorTable, (ClientData) colorPtr);
|
2892 |
colorPtr->flags |= DISPOSE_PENDING;
|
2893 |
}
|
2894 |
}
|
2895 |
|
2896 |
/*
|
2897 |
*----------------------------------------------------------------------
|
2898 |
*
|
2899 |
* AllocateColors --
|
2900 |
*
|
2901 |
* This procedure allocates the colors required by a color table,
|
2902 |
* and sets up the fields in the color table data structure which
|
2903 |
* are used in dithering.
|
2904 |
*
|
2905 |
* Results:
|
2906 |
* None.
|
2907 |
*
|
2908 |
* Side effects:
|
2909 |
* Colors are allocated from the X server. Fields in the
|
2910 |
* color table data structure are updated.
|
2911 |
*
|
2912 |
*----------------------------------------------------------------------
|
2913 |
*/
|
2914 |
|
2915 |
static void
|
2916 |
AllocateColors(colorPtr)
|
2917 |
ColorTable *colorPtr; /* Pointer to the color table requiring
|
2918 |
* colors to be allocated. */
|
2919 |
{
|
2920 |
int i, r, g, b, rMult, mono;
|
2921 |
int numColors, nRed, nGreen, nBlue;
|
2922 |
double fr, fg, fb, igam;
|
2923 |
XColor *colors;
|
2924 |
unsigned long *pixels;
|
2925 |
|
2926 |
/* 16-bit intensity value for i/n of full intensity. */
|
2927 |
# define CFRAC(i, n) ((i) * 65535 / (n))
|
2928 |
|
2929 |
/* As for CFRAC, but apply exponent of g. */
|
2930 |
# define CGFRAC(i, n, g) ((int)(65535 * pow((double)(i) / (n), (g))))
|
2931 |
|
2932 |
/*
|
2933 |
* First parse the palette specification to get the required number of
|
2934 |
* shades of each primary.
|
2935 |
*/
|
2936 |
|
2937 |
mono = sscanf(colorPtr->id.palette, "%d/%d/%d", &nRed, &nGreen, &nBlue)
|
2938 |
<= 1;
|
2939 |
igam = 1.0 / colorPtr->id.gamma;
|
2940 |
|
2941 |
/*
|
2942 |
* Each time around this loop, we reduce the number of colors we're
|
2943 |
* trying to allocate until we succeed in allocating all of the colors
|
2944 |
* we need.
|
2945 |
*/
|
2946 |
|
2947 |
for (;;) {
|
2948 |
/*
|
2949 |
* If we are using 1 bit/pixel, we don't need to allocate
|
2950 |
* any colors (we just use the foreground and background
|
2951 |
* colors in the GC).
|
2952 |
*/
|
2953 |
|
2954 |
if (mono && (nRed <= 2)) {
|
2955 |
colorPtr->flags |= BLACK_AND_WHITE;
|
2956 |
return;
|
2957 |
}
|
2958 |
|
2959 |
/*
|
2960 |
* Calculate the RGB coordinates of the colors we want to
|
2961 |
* allocate and store them in *colors.
|
2962 |
*/
|
2963 |
|
2964 |
if ((colorPtr->visualInfo.class == DirectColor)
|
2965 |
|| (colorPtr->visualInfo.class == TrueColor)) {
|
2966 |
|
2967 |
/*
|
2968 |
* Direct/True Color: allocate shades of red, green, blue
|
2969 |
* independently.
|
2970 |
*/
|
2971 |
|
2972 |
if (mono) {
|
2973 |
numColors = nGreen = nBlue = nRed;
|
2974 |
} else {
|
2975 |
numColors = MAX(MAX(nRed, nGreen), nBlue);
|
2976 |
}
|
2977 |
colors = (XColor *) ckalloc(numColors * sizeof(XColor));
|
2978 |
|
2979 |
for (i = 0; i < numColors; ++i) {
|
2980 |
if (igam == 1.0) {
|
2981 |
colors[i].red = CFRAC(i, nRed - 1);
|
2982 |
colors[i].green = CFRAC(i, nGreen - 1);
|
2983 |
colors[i].blue = CFRAC(i, nBlue - 1);
|
2984 |
} else {
|
2985 |
colors[i].red = CGFRAC(i, nRed - 1, igam);
|
2986 |
colors[i].green = CGFRAC(i, nGreen - 1, igam);
|
2987 |
colors[i].blue = CGFRAC(i, nBlue - 1, igam);
|
2988 |
}
|
2989 |
}
|
2990 |
} else {
|
2991 |
/*
|
2992 |
* PseudoColor, StaticColor, GrayScale or StaticGray visual:
|
2993 |
* we have to allocate each color in the color cube separately.
|
2994 |
*/
|
2995 |
|
2996 |
numColors = (mono) ? nRed: (nRed * nGreen * nBlue);
|
2997 |
colors = (XColor *) ckalloc(numColors * sizeof(XColor));
|
2998 |
|
2999 |
if (!mono) {
|
3000 |
/*
|
3001 |
* Color display using a PseudoColor or StaticColor visual.
|
3002 |
*/
|
3003 |
|
3004 |
i = 0;
|
3005 |
for (r = 0; r < nRed; ++r) {
|
3006 |
for (g = 0; g < nGreen; ++g) {
|
3007 |
for (b = 0; b < nBlue; ++b) {
|
3008 |
if (igam == 1.0) {
|
3009 |
colors[i].red = CFRAC(r, nRed - 1);
|
3010 |
colors[i].green = CFRAC(g, nGreen - 1);
|
3011 |
colors[i].blue = CFRAC(b, nBlue - 1);
|
3012 |
} else {
|
3013 |
colors[i].red = CGFRAC(r, nRed - 1, igam);
|
3014 |
colors[i].green = CGFRAC(g, nGreen - 1, igam);
|
3015 |
colors[i].blue = CGFRAC(b, nBlue - 1, igam);
|
3016 |
}
|
3017 |
i++;
|
3018 |
}
|
3019 |
}
|
3020 |
}
|
3021 |
} else {
|
3022 |
/*
|
3023 |
* Monochrome display - allocate the shades of grey we want.
|
3024 |
*/
|
3025 |
|
3026 |
for (i = 0; i < numColors; ++i) {
|
3027 |
if (igam == 1.0) {
|
3028 |
r = CFRAC(i, numColors - 1);
|
3029 |
} else {
|
3030 |
r = CGFRAC(i, numColors - 1, igam);
|
3031 |
}
|
3032 |
colors[i].red = colors[i].green = colors[i].blue = r;
|
3033 |
}
|
3034 |
}
|
3035 |
}
|
3036 |
|
3037 |
/*
|
3038 |
* Now try to allocate the colors we've calculated.
|
3039 |
*/
|
3040 |
|
3041 |
pixels = (unsigned long *) ckalloc(numColors * sizeof(unsigned long));
|
3042 |
for (i = 0; i < numColors; ++i) {
|
3043 |
if (!XAllocColor(colorPtr->id.display, colorPtr->id.colormap,
|
3044 |
&colors[i])) {
|
3045 |
|
3046 |
/*
|
3047 |
* Can't get all the colors we want in the default colormap;
|
3048 |
* first try freeing colors from other unused color tables.
|
3049 |
*/
|
3050 |
|
3051 |
if (!ReclaimColors(&colorPtr->id, numColors - i)
|
3052 |
|| !XAllocColor(colorPtr->id.display,
|
3053 |
colorPtr->id.colormap, &colors[i])) {
|
3054 |
/*
|
3055 |
* Still can't allocate the color.
|
3056 |
*/
|
3057 |
break;
|
3058 |
}
|
3059 |
}
|
3060 |
pixels[i] = colors[i].pixel;
|
3061 |
}
|
3062 |
|
3063 |
/*
|
3064 |
* If we didn't get all of the colors, reduce the
|
3065 |
* resolution of the color cube, free the ones we got,
|
3066 |
* and try again.
|
3067 |
*/
|
3068 |
|
3069 |
if (i >= numColors) {
|
3070 |
break;
|
3071 |
}
|
3072 |
XFreeColors(colorPtr->id.display, colorPtr->id.colormap, pixels, i, 0);
|
3073 |
ckfree((char *) colors);
|
3074 |
ckfree((char *) pixels);
|
3075 |
|
3076 |
if (!mono) {
|
3077 |
if ((nRed == 2) && (nGreen == 2) && (nBlue == 2)) {
|
3078 |
/*
|
3079 |
* Fall back to 1-bit monochrome display.
|
3080 |
*/
|
3081 |
|
3082 |
mono = 1;
|
3083 |
} else {
|
3084 |
/*
|
3085 |
* Reduce the number of shades of each primary to about
|
3086 |
* 3/4 of the previous value. This should reduce the
|
3087 |
* total number of colors required to about half the
|
3088 |
* previous value for PseudoColor displays.
|
3089 |
*/
|
3090 |
|
3091 |
nRed = (nRed * 3 + 2) / 4;
|
3092 |
nGreen = (nGreen * 3 + 2) / 4;
|
3093 |
nBlue = (nBlue * 3 + 2) / 4;
|
3094 |
}
|
3095 |
} else {
|
3096 |
/*
|
3097 |
* Reduce the number of shades of gray to about 1/2.
|
3098 |
*/
|
3099 |
|
3100 |
nRed = nRed / 2;
|
3101 |
}
|
3102 |
}
|
3103 |
|
3104 |
/*
|
3105 |
* We have allocated all of the necessary colors:
|
3106 |
* fill in various fields of the ColorTable record.
|
3107 |
*/
|
3108 |
|
3109 |
if (!mono) {
|
3110 |
colorPtr->flags |= COLOR_WINDOW;
|
3111 |
|
3112 |
/*
|
3113 |
* The following is a hairy hack. We only want to index into
|
3114 |
* the pixelMap on colormap displays. However, if the display
|
3115 |
* is on Windows, then we actually want to store the index not
|
3116 |
* the value since we will be passing the color table into the
|
3117 |
* TkPutImage call.
|
3118 |
*/
|
3119 |
|
3120 |
#ifndef __WIN32__
|
3121 |
if ((colorPtr->visualInfo.class != DirectColor)
|
3122 |
&& (colorPtr->visualInfo.class != TrueColor)) {
|
3123 |
colorPtr->flags |= MAP_COLORS;
|
3124 |
}
|
3125 |
#endif /* __WIN32__ */
|
3126 |
}
|
3127 |
|
3128 |
colorPtr->numColors = numColors;
|
3129 |
colorPtr->pixelMap = pixels;
|
3130 |
|
3131 |
/*
|
3132 |
* Set up quantization tables for dithering.
|
3133 |
*/
|
3134 |
rMult = nGreen * nBlue;
|
3135 |
for (i = 0; i < 256; ++i) {
|
3136 |
r = (i * (nRed - 1) + 127) / 255;
|
3137 |
if (mono) {
|
3138 |
fr = (double) colors[r].red / 65535.0;
|
3139 |
if (colorPtr->id.gamma != 1.0 ) {
|
3140 |
fr = pow(fr, colorPtr->id.gamma);
|
3141 |
}
|
3142 |
colorPtr->colorQuant[0][i] = (int)(fr * 255.99);
|
3143 |
colorPtr->redValues[i] = colors[r].pixel;
|
3144 |
} else {
|
3145 |
g = (i * (nGreen - 1) + 127) / 255;
|
3146 |
b = (i * (nBlue - 1) + 127) / 255;
|
3147 |
if ((colorPtr->visualInfo.class == DirectColor)
|
3148 |
|| (colorPtr->visualInfo.class == TrueColor)) {
|
3149 |
colorPtr->redValues[i] = colors[r].pixel
|
3150 |
& colorPtr->visualInfo.red_mask;
|
3151 |
colorPtr->greenValues[i] = colors[g].pixel
|
3152 |
& colorPtr->visualInfo.green_mask;
|
3153 |
colorPtr->blueValues[i] = colors[b].pixel
|
3154 |
& colorPtr->visualInfo.blue_mask;
|
3155 |
} else {
|
3156 |
r *= rMult;
|
3157 |
g *= nBlue;
|
3158 |
colorPtr->redValues[i] = r;
|
3159 |
colorPtr->greenValues[i] = g;
|
3160 |
colorPtr->blueValues[i] = b;
|
3161 |
}
|
3162 |
fr = (double) colors[r].red / 65535.0;
|
3163 |
fg = (double) colors[g].green / 65535.0;
|
3164 |
fb = (double) colors[b].blue / 65535.0;
|
3165 |
if (colorPtr->id.gamma != 1.0) {
|
3166 |
fr = pow(fr, colorPtr->id.gamma);
|
3167 |
fg = pow(fg, colorPtr->id.gamma);
|
3168 |
fb = pow(fb, colorPtr->id.gamma);
|
3169 |
}
|
3170 |
colorPtr->colorQuant[0][i] = (int)(fr * 255.99);
|
3171 |
colorPtr->colorQuant[1][i] = (int)(fg * 255.99);
|
3172 |
colorPtr->colorQuant[2][i] = (int)(fb * 255.99);
|
3173 |
}
|
3174 |
}
|
3175 |
|
3176 |
ckfree((char *) colors);
|
3177 |
}
|
3178 |
|
3179 |
/*
|
3180 |
*----------------------------------------------------------------------
|
3181 |
*
|
3182 |
* DisposeColorTable --
|
3183 |
*
|
3184 |
*
|
3185 |
* Results:
|
3186 |
* None.
|
3187 |
*
|
3188 |
* Side effects:
|
3189 |
* The colors in the argument color table are freed, as is the
|
3190 |
* color table structure itself. The color table is removed
|
3191 |
* from the hash table which is used to locate color tables.
|
3192 |
*
|
3193 |
*----------------------------------------------------------------------
|
3194 |
*/
|
3195 |
|
3196 |
static void
|
3197 |
DisposeColorTable(clientData)
|
3198 |
ClientData clientData; /* Pointer to the ColorTable whose
|
3199 |
* colors are to be released. */
|
3200 |
{
|
3201 |
ColorTable *colorPtr;
|
3202 |
Tcl_HashEntry *entry;
|
3203 |
|
3204 |
colorPtr = (ColorTable *) clientData;
|
3205 |
if (colorPtr->pixelMap != NULL) {
|
3206 |
if (colorPtr->numColors > 0) {
|
3207 |
XFreeColors(colorPtr->id.display, colorPtr->id.colormap,
|
3208 |
colorPtr->pixelMap, colorPtr->numColors, 0);
|
3209 |
Tk_FreeColormap(colorPtr->id.display, colorPtr->id.colormap);
|
3210 |
}
|
3211 |
ckfree((char *) colorPtr->pixelMap);
|
3212 |
}
|
3213 |
|
3214 |
entry = Tcl_FindHashEntry(&imgPhotoColorHash, (char *) &colorPtr->id);
|
3215 |
if (entry == NULL) {
|
3216 |
panic("DisposeColorTable couldn't find hash entry");
|
3217 |
}
|
3218 |
Tcl_DeleteHashEntry(entry);
|
3219 |
|
3220 |
ckfree((char *) colorPtr);
|
3221 |
}
|
3222 |
|
3223 |
/*
|
3224 |
*----------------------------------------------------------------------
|
3225 |
*
|
3226 |
* ReclaimColors --
|
3227 |
*
|
3228 |
* This procedure is called to try to free up colors in the
|
3229 |
* colormap used by a color table. It looks for other color
|
3230 |
* tables with the same colormap and with a zero live reference
|
3231 |
* count, and frees their colors. It only does so if there is
|
3232 |
* the possibility of freeing up at least `numColors' colors.
|
3233 |
*
|
3234 |
* Results:
|
3235 |
* The return value is TRUE if any colors were freed, FALSE
|
3236 |
* otherwise.
|
3237 |
*
|
3238 |
* Side effects:
|
3239 |
* ColorTables which are not currently in use may lose their
|
3240 |
* color allocations.
|
3241 |
*
|
3242 |
*---------------------------------------------------------------------- */
|
3243 |
|
3244 |
static int
|
3245 |
ReclaimColors(id, numColors)
|
3246 |
ColorTableId *id; /* Pointer to information identifying
|
3247 |
* the color table which needs more colors. */
|
3248 |
int numColors; /* Number of colors required. */
|
3249 |
{
|
3250 |
Tcl_HashSearch srch;
|
3251 |
Tcl_HashEntry *entry;
|
3252 |
ColorTable *colorPtr;
|
3253 |
int nAvail;
|
3254 |
|
3255 |
/*
|
3256 |
* First scan through the color hash table to get an
|
3257 |
* upper bound on how many colors we might be able to free.
|
3258 |
*/
|
3259 |
|
3260 |
nAvail = 0;
|
3261 |
entry = Tcl_FirstHashEntry(&imgPhotoColorHash, &srch);
|
3262 |
while (entry != NULL) {
|
3263 |
colorPtr = (ColorTable *) Tcl_GetHashValue(entry);
|
3264 |
if ((colorPtr->id.display == id->display)
|
3265 |
&& (colorPtr->id.colormap == id->colormap)
|
3266 |
&& (colorPtr->liveRefCount == 0 )&& (colorPtr->numColors != 0)
|
3267 |
&& ((colorPtr->id.palette != id->palette)
|
3268 |
|| (colorPtr->id.gamma != id->gamma))) {
|
3269 |
|
3270 |
/*
|
3271 |
* We could take this guy's colors off him.
|
3272 |
*/
|
3273 |
|
3274 |
nAvail += colorPtr->numColors;
|
3275 |
}
|
3276 |
entry = Tcl_NextHashEntry(&srch);
|
3277 |
}
|
3278 |
|
3279 |
/*
|
3280 |
* nAvail is an (over)estimate of the number of colors we could free.
|
3281 |
*/
|
3282 |
|
3283 |
if (nAvail < numColors) {
|
3284 |
return 0;
|
3285 |
}
|
3286 |
|
3287 |
/*
|
3288 |
* Scan through a second time freeing colors.
|
3289 |
*/
|
3290 |
|
3291 |
entry = Tcl_FirstHashEntry(&imgPhotoColorHash, &srch);
|
3292 |
while ((entry != NULL) && (numColors > 0)) {
|
3293 |
colorPtr = (ColorTable *) Tcl_GetHashValue(entry);
|
3294 |
if ((colorPtr->id.display == id->display)
|
3295 |
&& (colorPtr->id.colormap == id->colormap)
|
3296 |
&& (colorPtr->liveRefCount == 0) && (colorPtr->numColors != 0)
|
3297 |
&& ((colorPtr->id.palette != id->palette)
|
3298 |
|| (colorPtr->id.gamma != id->gamma))) {
|
3299 |
|
3300 |
/*
|
3301 |
* Free the colors that this ColorTable has.
|
3302 |
*/
|
3303 |
|
3304 |
XFreeColors(colorPtr->id.display, colorPtr->id.colormap,
|
3305 |
colorPtr->pixelMap, colorPtr->numColors, 0);
|
3306 |
numColors -= colorPtr->numColors;
|
3307 |
colorPtr->numColors = 0;
|
3308 |
ckfree((char *) colorPtr->pixelMap);
|
3309 |
colorPtr->pixelMap = NULL;
|
3310 |
}
|
3311 |
|
3312 |
entry = Tcl_NextHashEntry(&srch);
|
3313 |
}
|
3314 |
return 1; /* we freed some colors */
|
3315 |
}
|
3316 |
|
3317 |
/*
|
3318 |
*----------------------------------------------------------------------
|
3319 |
*
|
3320 |
* DisposeInstance --
|
3321 |
*
|
3322 |
* This procedure is called to finally free up an instance
|
3323 |
* of a photo image which is no longer required.
|
3324 |
*
|
3325 |
* Results:
|
3326 |
* None.
|
3327 |
*
|
3328 |
* Side effects:
|
3329 |
* The instance data structure and the resources it references
|
3330 |
* are freed.
|
3331 |
*
|
3332 |
*----------------------------------------------------------------------
|
3333 |
*/
|
3334 |
|
3335 |
static void
|
3336 |
DisposeInstance(clientData)
|
3337 |
ClientData clientData; /* Pointer to the instance whose resources
|
3338 |
* are to be released. */
|
3339 |
{
|
3340 |
PhotoInstance *instancePtr = (PhotoInstance *) clientData;
|
3341 |
PhotoInstance *prevPtr;
|
3342 |
|
3343 |
if (instancePtr->pixels != None) {
|
3344 |
Tk_FreePixmap(instancePtr->display, instancePtr->pixels);
|
3345 |
}
|
3346 |
if (instancePtr->gc != None) {
|
3347 |
Tk_FreeGC(instancePtr->display, instancePtr->gc);
|
3348 |
}
|
3349 |
if (instancePtr->imagePtr != NULL) {
|
3350 |
XFree((char *) instancePtr->imagePtr);
|
3351 |
}
|
3352 |
if (instancePtr->error != NULL) {
|
3353 |
ckfree((char *) instancePtr->error);
|
3354 |
}
|
3355 |
if (instancePtr->colorTablePtr != NULL) {
|
3356 |
FreeColorTable(instancePtr->colorTablePtr, 1);
|
3357 |
}
|
3358 |
|
3359 |
if (instancePtr->masterPtr->instancePtr == instancePtr) {
|
3360 |
instancePtr->masterPtr->instancePtr = instancePtr->nextPtr;
|
3361 |
} else {
|
3362 |
for (prevPtr = instancePtr->masterPtr->instancePtr;
|
3363 |
prevPtr->nextPtr != instancePtr; prevPtr = prevPtr->nextPtr) {
|
3364 |
/* Empty loop body */
|
3365 |
}
|
3366 |
prevPtr->nextPtr = instancePtr->nextPtr;
|
3367 |
}
|
3368 |
Tk_FreeColormap(instancePtr->display, instancePtr->colormap);
|
3369 |
ckfree((char *) instancePtr);
|
3370 |
}
|
3371 |
|
3372 |
/*
|
3373 |
*----------------------------------------------------------------------
|
3374 |
*
|
3375 |
* MatchFileFormat --
|
3376 |
*
|
3377 |
* This procedure is called to find a photo image file format
|
3378 |
* handler which can parse the image data in the given file.
|
3379 |
* If a user-specified format string is provided, only handlers
|
3380 |
* whose names match a prefix of the format string are tried.
|
3381 |
*
|
3382 |
* Results:
|
3383 |
* A standard TCL return value. If the return value is TCL_OK, a
|
3384 |
* pointer to the image format record is returned in
|
3385 |
* *imageFormatPtr, and the width and height of the image are
|
3386 |
* returned in *widthPtr and *heightPtr.
|
3387 |
*
|
3388 |
* Side effects:
|
3389 |
* None.
|
3390 |
*
|
3391 |
*----------------------------------------------------------------------
|
3392 |
*/
|
3393 |
|
3394 |
static int
|
3395 |
MatchFileFormat(interp, chan, fileName, formatObj, imageFormatPtr,
|
3396 |
widthPtr, heightPtr, oldformat)
|
3397 |
Tcl_Interp *interp; /* Interpreter to use for reporting errors. */
|
3398 |
Tcl_Channel chan; /* The image file, open for reading. */
|
3399 |
char *fileName; /* The name of the image file. */
|
3400 |
Tcl_Obj *formatObj; /* User-specified format string, or NULL. */
|
3401 |
Tk_PhotoImageFormat **imageFormatPtr;
|
3402 |
/* A pointer to the photo image format
|
3403 |
* record is returned here. */
|
3404 |
int *widthPtr, *heightPtr; /* The dimensions of the image are
|
3405 |
* returned here. */
|
3406 |
int *oldformat;
|
3407 |
{
|
3408 |
int matched;
|
3409 |
int useoldformat = 0;
|
3410 |
Tk_PhotoImageFormat *formatPtr;
|
3411 |
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
|
3412 |
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
|
3413 |
char *formatString = NULL;
|
3414 |
|
3415 |
if (formatObj) {
|
3416 |
formatString = Tcl_GetString(formatObj);
|
3417 |
}
|
3418 |
|
3419 |
/*
|
3420 |
* Scan through the table of file format handlers to find
|
3421 |
* one which can handle the image.
|
3422 |
*/
|
3423 |
|
3424 |
matched = 0;
|
3425 |
for (formatPtr = tsdPtr->formatList; formatPtr != NULL;
|
3426 |
formatPtr = formatPtr->nextPtr) {
|
3427 |
if (formatObj != NULL) {
|
3428 |
if (strncasecmp(formatString,
|
3429 |
formatPtr->name, strlen(formatPtr->name)) != 0) {
|
3430 |
continue;
|
3431 |
}
|
3432 |
matched = 1;
|
3433 |
if (formatPtr->fileMatchProc == NULL) {
|
3434 |
Tcl_AppendResult(interp, "-file option isn't supported for ",
|
3435 |
formatString, " images", (char *) NULL);
|
3436 |
return TCL_ERROR;
|
3437 |
}
|
3438 |
}
|
3439 |
if (formatPtr->fileMatchProc != NULL) {
|
3440 |
(void) Tcl_Seek(chan, 0L, SEEK_SET);
|
3441 |
|
3442 |
if ((*formatPtr->fileMatchProc)(chan, fileName, formatObj,
|
3443 |
widthPtr, heightPtr, interp)) {
|
3444 |
if (*widthPtr < 1) {
|
3445 |
*widthPtr = 1;
|
3446 |
}
|
3447 |
if (*heightPtr < 1) {
|
3448 |
*heightPtr = 1;
|
3449 |
}
|
3450 |
break;
|
3451 |
}
|
3452 |
}
|
3453 |
}
|
3454 |
if (formatPtr == NULL) {
|
3455 |
useoldformat = 1;
|
3456 |
for (formatPtr = tsdPtr->oldFormatList; formatPtr != NULL;
|
3457 |
formatPtr = formatPtr->nextPtr) {
|
3458 |
if (formatString != NULL) {
|
3459 |
if (strncasecmp(formatString,
|
3460 |
formatPtr->name, strlen(formatPtr->name)) != 0) {
|
3461 |
continue;
|
3462 |
}
|
3463 |
matched = 1;
|
3464 |
if (formatPtr->fileMatchProc == NULL) {
|
3465 |
Tcl_AppendResult(interp, "-file option isn't supported for ",
|
3466 |
formatString, " images", (char *) NULL);
|
3467 |
return TCL_ERROR;
|
3468 |
}
|
3469 |
}
|
3470 |
if (formatPtr->fileMatchProc != NULL) {
|
3471 |
(void) Tcl_Seek(chan, 0L, SEEK_SET);
|
3472 |
if ((*formatPtr->fileMatchProc)(chan, fileName, (Tcl_Obj *) formatString,
|
3473 |
widthPtr, heightPtr, interp)) {
|
3474 |
if (*widthPtr < 1) {
|
3475 |
*widthPtr = 1;
|
3476 |
}
|
3477 |
if (*heightPtr < 1) {
|
3478 |
*heightPtr = 1;
|
3479 |
}
|
3480 |
break;
|
3481 |
}
|
3482 |
}
|
3483 |
}
|
3484 |
}
|
3485 |
|
3486 |
if (formatPtr == NULL) {
|
3487 |
if ((formatObj != NULL) && !matched) {
|
3488 |
Tcl_AppendResult(interp, "image file format \"",
|
3489 |
formatString,
|
3490 |
"\" is not supported", (char *) NULL);
|
3491 |
} else {
|
3492 |
Tcl_AppendResult(interp,
|
3493 |
"couldn't recognize data in image file \"",
|
3494 |
fileName, "\"", (char *) NULL);
|
3495 |
}
|
3496 |
return TCL_ERROR;
|
3497 |
}
|
3498 |
|
3499 |
*imageFormatPtr = formatPtr;
|
3500 |
*oldformat = useoldformat;
|
3501 |
(void) Tcl_Seek(chan, 0L, SEEK_SET);
|
3502 |
return TCL_OK;
|
3503 |
}
|
3504 |
|
3505 |
/*
|
3506 |
*----------------------------------------------------------------------
|
3507 |
*
|
3508 |
* MatchStringFormat --
|
3509 |
*
|
3510 |
* This procedure is called to find a photo image file format
|
3511 |
* handler which can parse the image data in the given string.
|
3512 |
* If a user-specified format string is provided, only handlers
|
3513 |
* whose names match a prefix of the format string are tried.
|
3514 |
*
|
3515 |
* Results:
|
3516 |
* A standard TCL return value. If the return value is TCL_OK, a
|
3517 |
* pointer to the image format record is returned in
|
3518 |
* *imageFormatPtr, and the width and height of the image are
|
3519 |
* returned in *widthPtr and *heightPtr.
|
3520 |
*
|
3521 |
* Side effects:
|
3522 |
* None.
|
3523 |
*
|
3524 |
*----------------------------------------------------------------------
|
3525 |
*/
|
3526 |
|
3527 |
static int
|
3528 |
MatchStringFormat(interp, data, formatObj, imageFormatPtr,
|
3529 |
widthPtr, heightPtr, oldformat)
|
3530 |
Tcl_Interp *interp; /* Interpreter to use for reporting errors. */
|
3531 |
Tcl_Obj *data; /* Object containing the image data. */
|
3532 |
Tcl_Obj *formatObj; /* User-specified format string, or NULL. */
|
3533 |
Tk_PhotoImageFormat **imageFormatPtr;
|
3534 |
/* A pointer to the photo image format
|
3535 |
* record is returned here. */
|
3536 |
int *widthPtr, *heightPtr; /* The dimensions of the image are
|
3537 |
* returned here. */
|
3538 |
int *oldformat; /* returns 1 if the old image API is used */
|
3539 |
{
|
3540 |
int matched;
|
3541 |
int useoldformat = 0;
|
3542 |
Tk_PhotoImageFormat *formatPtr;
|
3543 |
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
|
3544 |
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
|
3545 |
char *formatString = NULL;
|
3546 |
|
3547 |
if (formatObj) {
|
3548 |
formatString = Tcl_GetString(formatObj);
|
3549 |
}
|
3550 |
|
3551 |
/*
|
3552 |
* Scan through the table of file format handlers to find
|
3553 |
* one which can handle the image.
|
3554 |
*/
|
3555 |
|
3556 |
matched = 0;
|
3557 |
for (formatPtr = tsdPtr->formatList; formatPtr != NULL;
|
3558 |
formatPtr = formatPtr->nextPtr) {
|
3559 |
if (formatObj != NULL) {
|
3560 |
if (strncasecmp(formatString,
|
3561 |
formatPtr->name, strlen(formatPtr->name)) != 0) {
|
3562 |
continue;
|
3563 |
}
|
3564 |
matched = 1;
|
3565 |
if (formatPtr->stringMatchProc == NULL) {
|
3566 |
Tcl_AppendResult(interp, "-data option isn't supported for ",
|
3567 |
formatString, " images", (char *) NULL);
|
3568 |
return TCL_ERROR;
|
3569 |
}
|
3570 |
}
|
3571 |
if ((formatPtr->stringMatchProc != NULL)
|
3572 |
&& (formatPtr->stringReadProc != NULL)
|
3573 |
&& (*formatPtr->stringMatchProc)(data, formatObj,
|
3574 |
widthPtr, heightPtr, interp)) {
|
3575 |
break;
|
3576 |
}
|
3577 |
}
|
3578 |
|
3579 |
if (formatPtr == NULL) {
|
3580 |
useoldformat = 1;
|
3581 |
for (formatPtr = tsdPtr->oldFormatList; formatPtr != NULL;
|
3582 |
formatPtr = formatPtr->nextPtr) {
|
3583 |
if (formatObj != NULL) {
|
3584 |
if (strncasecmp(formatString,
|
3585 |
formatPtr->name, strlen(formatPtr->name)) != 0) {
|
3586 |
continue;
|
3587 |
}
|
3588 |
matched = 1;
|
3589 |
if (formatPtr->stringMatchProc == NULL) {
|
3590 |
Tcl_AppendResult(interp, "-data option isn't supported for ",
|
3591 |
formatString, " images", (char *) NULL);
|
3592 |
return TCL_ERROR;
|
3593 |
}
|
3594 |
}
|
3595 |
if ((formatPtr->stringMatchProc != NULL)
|
3596 |
&& (formatPtr->stringReadProc != NULL)
|
3597 |
&& (*formatPtr->stringMatchProc)((Tcl_Obj *) Tcl_GetString(data),
|
3598 |
(Tcl_Obj *) formatString,
|
3599 |
widthPtr, heightPtr, interp)) {
|
3600 |
break;
|
3601 |
}
|
3602 |
}
|
3603 |
}
|
3604 |
if (formatPtr == NULL) {
|
3605 |
if ((formatObj != NULL) && !matched) {
|
3606 |
Tcl_AppendResult(interp, "image format \"",
|
3607 |
formatString,
|
3608 |
"\" is not supported", (char *) NULL);
|
3609 |
} else {
|
3610 |
Tcl_AppendResult(interp, "couldn't recognize image data",
|
3611 |
(char *) NULL);
|
3612 |
}
|
3613 |
return TCL_ERROR;
|
3614 |
}
|
3615 |
|
3616 |
*imageFormatPtr = formatPtr;
|
3617 |
*oldformat = useoldformat;
|
3618 |
return TCL_OK;
|
3619 |
}
|
3620 |
|
3621 |
/*
|
3622 |
*----------------------------------------------------------------------
|
3623 |
*
|
3624 |
* Tk_FindPhoto --
|
3625 |
*
|
3626 |
* This procedure is called to get an opaque handle (actually a
|
3627 |
* PhotoMaster *) for a given image, which can be used in
|
3628 |
* subsequent calls to Tk_PhotoPutBlock, etc. The `name'
|
3629 |
* parameter is the name of the image.
|
3630 |
*
|
3631 |
* Results:
|
3632 |
* The handle for the photo image, or NULL if there is no
|
3633 |
* photo image with the name given.
|
3634 |
*
|
3635 |
* Side effects:
|
3636 |
* None.
|
3637 |
*
|
3638 |
*----------------------------------------------------------------------
|
3639 |
*/
|
3640 |
|
3641 |
Tk_PhotoHandle
|
3642 |
Tk_FindPhoto(interp, imageName)
|
3643 |
Tcl_Interp *interp; /* Interpreter (application) in which image
|
3644 |
* exists. */
|
3645 |
char *imageName; /* Name of the desired photo image. */
|
3646 |
{
|
3647 |
ClientData clientData;
|
3648 |
Tk_ImageType *typePtr;
|
3649 |
|
3650 |
clientData = Tk_GetImageMasterData(interp, imageName, &typePtr);
|
3651 |
if (typePtr != &tkPhotoImageType) {
|
3652 |
return NULL;
|
3653 |
}
|
3654 |
return (Tk_PhotoHandle) clientData;
|
3655 |
}
|
3656 |
|
3657 |
/*
|
3658 |
*----------------------------------------------------------------------
|
3659 |
*
|
3660 |
* Tk_PhotoPutBlock --
|
3661 |
*
|
3662 |
* This procedure is called to put image data into a photo image.
|
3663 |
*
|
3664 |
* Results:
|
3665 |
* None.
|
3666 |
*
|
3667 |
* Side effects:
|
3668 |
* The image data is stored. The image may be expanded.
|
3669 |
* The Tk image code is informed that the image has changed.
|
3670 |
*
|
3671 |
*---------------------------------------------------------------------- */
|
3672 |
|
3673 |
void
|
3674 |
Tk_PhotoPutBlock(handle, blockPtr, x, y, width, height)
|
3675 |
Tk_PhotoHandle handle; /* Opaque handle for the photo image
|
3676 |
* to be updated. */
|
3677 |
register Tk_PhotoImageBlock *blockPtr;
|
3678 |
/* Pointer to a structure describing the
|
3679 |
* pixel data to be copied into the image. */
|
3680 |
int x, y; /* Coordinates of the top-left pixel to
|
3681 |
* be updated in the image. */
|
3682 |
int width, height; /* Dimensions of the area of the image
|
3683 |
* to be updated. */
|
3684 |
{
|
3685 |
register PhotoMaster *masterPtr;
|
3686 |
int xEnd, yEnd;
|
3687 |
int greenOffset, blueOffset, alphaOffset;
|
3688 |
int wLeft, hLeft;
|
3689 |
int wCopy, hCopy;
|
3690 |
unsigned char *srcPtr, *srcLinePtr;
|
3691 |
unsigned char *destPtr, *destLinePtr;
|
3692 |
int pitch;
|
3693 |
XRectangle rect;
|
3694 |
|
3695 |
masterPtr = (PhotoMaster *) handle;
|
3696 |
|
3697 |
if ((masterPtr->userWidth != 0) && ((x + width) > masterPtr->userWidth)) {
|
3698 |
width = masterPtr->userWidth - x;
|
3699 |
}
|
3700 |
if ((masterPtr->userHeight != 0)
|
3701 |
&& ((y + height) > masterPtr->userHeight)) {
|
3702 |
height = masterPtr->userHeight - y;
|
3703 |
}
|
3704 |
if ((width <= 0) || (height <= 0))
|
3705 |
return;
|
3706 |
|
3707 |
xEnd = x + width;
|
3708 |
yEnd = y + height;
|
3709 |
if ((xEnd > masterPtr->width) || (yEnd > masterPtr->height)) {
|
3710 |
ImgPhotoSetSize(masterPtr, MAX(xEnd, masterPtr->width),
|
3711 |
MAX(yEnd, masterPtr->height));
|
3712 |
}
|
3713 |
|
3714 |
if ((y < masterPtr->ditherY) || ((y == masterPtr->ditherY)
|
3715 |
&& (x < masterPtr->ditherX))) {
|
3716 |
/*
|
3717 |
* The dithering isn't correct past the start of this block.
|
3718 |
*/
|
3719 |
masterPtr->ditherX = x;
|
3720 |
masterPtr->ditherY = y;
|
3721 |
}
|
3722 |
|
3723 |
/*
|
3724 |
* If this image block could have different red, green and blue
|
3725 |
* components, mark it as a color image.
|
3726 |
*/
|
3727 |
|
3728 |
greenOffset = blockPtr->offset[1] - blockPtr->offset[0];
|
3729 |
blueOffset = blockPtr->offset[2] - blockPtr->offset[0];
|
3730 |
alphaOffset = blockPtr->offset[3];
|
3731 |
if ((alphaOffset >= blockPtr->pixelSize) || (alphaOffset < 0)) {
|
3732 |
alphaOffset = 0;
|
3733 |
} else {
|
3734 |
alphaOffset -= blockPtr->offset[0];
|
3735 |
}
|
3736 |
if ((greenOffset != 0) || (blueOffset != 0)) {
|
3737 |
masterPtr->flags |= COLOR_IMAGE;
|
3738 |
}
|
3739 |
|
3740 |
/*
|
3741 |
* Copy the data into our local 24-bit/pixel array.
|
3742 |
* If we can do it with a single memcpy, we do.
|
3743 |
*/
|
3744 |
|
3745 |
destLinePtr = masterPtr->pix24 + (y * masterPtr->width + x) * 4;
|
3746 |
pitch = masterPtr->width * 4;
|
3747 |
|
3748 |
/*
|
3749 |
* This test is probably too restrictive. We should also be able to
|
3750 |
* do a memcpy if pixelSize == 3 and alphaOffset == 0. Maybe other cases
|
3751 |
* too.
|
3752 |
*/
|
3753 |
if ((blockPtr->pixelSize == 4)
|
3754 |
&& (greenOffset == 1) && (blueOffset == 2) && (alphaOffset == 3)
|
3755 |
&& (width <= blockPtr->width) && (height <= blockPtr->height)
|
3756 |
&& ((height == 1) || ((x == 0) && (width == masterPtr->width)
|
3757 |
&& (blockPtr->pitch == pitch)))) {
|
3758 |
memcpy((VOID *) destLinePtr,
|
3759 |
(VOID *) (blockPtr->pixelPtr + blockPtr->offset[0]),
|
3760 |
(size_t) (height * width * 4));
|
3761 |
} else {
|
3762 |
for (hLeft = height; hLeft > 0;) {
|
3763 |
srcLinePtr = blockPtr->pixelPtr + blockPtr->offset[0];
|
3764 |
hCopy = MIN(hLeft, blockPtr->height);
|
3765 |
hLeft -= hCopy;
|
3766 |
for (; hCopy > 0; --hCopy) {
|
3767 |
destPtr = destLinePtr;
|
3768 |
for (wLeft = width; wLeft > 0;) {
|
3769 |
wCopy = MIN(wLeft, blockPtr->width);
|
3770 |
wLeft -= wCopy;
|
3771 |
srcPtr = srcLinePtr;
|
3772 |
for (; wCopy > 0; --wCopy) {
|
3773 |
if (!destPtr[3]) {
|
3774 |
destPtr[0] = destPtr[1] = destPtr[2] = 0xd9;
|
3775 |
}
|
3776 |
if (!alphaOffset || (srcPtr[alphaOffset] == 255)) {
|
3777 |
*destPtr++ = srcPtr[0];
|
3778 |
*destPtr++ = srcPtr[greenOffset];
|
3779 |
*destPtr++ = srcPtr[blueOffset];
|
3780 |
*destPtr++ = 255;
|
3781 |
} else {
|
3782 |
if (srcPtr[alphaOffset]) {
|
3783 |
destPtr[0] += (srcPtr[0] - destPtr[0]) * srcPtr[alphaOffset] / 255;
|
3784 |
destPtr[1] += (srcPtr[greenOffset] - destPtr[1]) * srcPtr[alphaOffset] / 255;
|
3785 |
destPtr[2] += (srcPtr[blueOffset] - destPtr[2]) * srcPtr[alphaOffset] / 255;
|
3786 |
destPtr[3] += (255 - destPtr[3]) * srcPtr[alphaOffset] / 255;
|
3787 |
}
|
3788 |
destPtr+=4;
|
3789 |
}
|
3790 |
srcPtr += blockPtr->pixelSize;
|
3791 |
}
|
3792 |
}
|
3793 |
srcLinePtr += blockPtr->pitch;
|
3794 |
destLinePtr += pitch;
|
3795 |
}
|
3796 |
}
|
3797 |
}
|
3798 |
|
3799 |
/*
|
3800 |
* Add this new block to the region which specifies which data is valid.
|
3801 |
*/
|
3802 |
|
3803 |
if (alphaOffset) {
|
3804 |
int x1, y1, end;
|
3805 |
|
3806 |
/*
|
3807 |
* This block is grossly inefficient. For each row in the image, it
|
3808 |
* finds each continguous string of transparent pixels, then marks those
|
3809 |
* areas as invalid in the validRegion mask. This makes drawing very
|
3810 |
* efficient, because of the way we use X: we just say, here's your
|
3811 |
* mask, and here's your data. We need not worry about the current
|
3812 |
* background color, etc. But this costs us a lot on the image setup.
|
3813 |
* Still, image setup only happens once, whereas the drawing happens
|
3814 |
* many times, so this might be the best way to go.
|
3815 |
*
|
3816 |
* An alternative might be to not set up this mask, and instead, at
|
3817 |
* drawing time, for each transparent pixel, set its color to the
|
3818 |
* color of the background behind that pixel. This is what I suspect
|
3819 |
* most of programs do. However, they don't have to deal with the canvas,
|
3820 |
* which could have many different background colors. Determining the
|
3821 |
* correct bg color for a given pixel might be expensive.
|
3822 |
*/
|
3823 |
|
3824 |
destLinePtr = masterPtr->pix24 + (y * masterPtr->width + x) * 4 + 3;
|
3825 |
for (y1 = 0; y1 < height; y1++) {
|
3826 |
x1 = 0;
|
3827 |
destPtr = destLinePtr;
|
3828 |
while (x1 < width) {
|
3829 |
/* search for first non-transparent pixel */
|
3830 |
while ((x1 < width) && !*destPtr) {
|
3831 |
x1++; destPtr += 4;
|
3832 |
}
|
3833 |
end = x1;
|
3834 |
/* search for first transparent pixel */
|
3835 |
while ((end < width) && *destPtr) {
|
3836 |
end++; destPtr += 4;
|
3837 |
}
|
3838 |
if (end > x1) {
|
3839 |
rect.x = x + x1;
|
3840 |
rect.y = y + y1;
|
3841 |
rect.width = end - x1;
|
3842 |
rect.height = 1;
|
3843 |
TkUnionRectWithRegion(&rect, masterPtr->validRegion,
|
3844 |
masterPtr->validRegion);
|
3845 |
}
|
3846 |
x1 = end;
|
3847 |
}
|
3848 |
destLinePtr += masterPtr->width * 4;
|
3849 |
}
|
3850 |
} else {
|
3851 |
rect.x = x;
|
3852 |
rect.y = y;
|
3853 |
rect.width = width;
|
3854 |
rect.height = height;
|
3855 |
TkUnionRectWithRegion(&rect, masterPtr->validRegion,
|
3856 |
masterPtr->validRegion);
|
3857 |
}
|
3858 |
|
3859 |
/*
|
3860 |
* Update each instance.
|
3861 |
*/
|
3862 |
|
3863 |
Tk_DitherPhoto((Tk_PhotoHandle)masterPtr, x, y, width, height);
|
3864 |
|
3865 |
/*
|
3866 |
* Tell the core image code that this image has changed.
|
3867 |
*/
|
3868 |
|
3869 |
Tk_ImageChanged(masterPtr->tkMaster, x, y, width, height, masterPtr->width,
|
3870 |
masterPtr->height);
|
3871 |
}
|
3872 |
|
3873 |
/*
|
3874 |
*----------------------------------------------------------------------
|
3875 |
*
|
3876 |
* Tk_PhotoPutZoomedBlock --
|
3877 |
*
|
3878 |
* This procedure is called to put image data into a photo image,
|
3879 |
* with possible subsampling and/or zooming of the pixels.
|
3880 |
*
|
3881 |
* Results:
|
3882 |
* None.
|
3883 |
*
|
3884 |
* Side effects:
|
3885 |
* The image data is stored. The image may be expanded.
|
3886 |
* The Tk image code is informed that the image has changed.
|
3887 |
*
|
3888 |
*----------------------------------------------------------------------
|
3889 |
*/
|
3890 |
|
3891 |
void
|
3892 |
Tk_PhotoPutZoomedBlock(handle, blockPtr, x, y, width, height, zoomX, zoomY,
|
3893 |
subsampleX, subsampleY)
|
3894 |
Tk_PhotoHandle handle; /* Opaque handle for the photo image
|
3895 |
* to be updated. */
|
3896 |
register Tk_PhotoImageBlock *blockPtr;
|
3897 |
/* Pointer to a structure describing the
|
3898 |
* pixel data to be copied into the image. */
|
3899 |
int x, y; /* Coordinates of the top-left pixel to
|
3900 |
* be updated in the image. */
|
3901 |
int width, height; /* Dimensions of the area of the image
|
3902 |
* to be updated. */
|
3903 |
int zoomX, zoomY; /* Zoom factors for the X and Y axes. */
|
3904 |
int subsampleX, subsampleY; /* Subsampling factors for the X and Y axes. */
|
3905 |
{
|
3906 |
register PhotoMaster *masterPtr;
|
3907 |
int xEnd, yEnd;
|
3908 |
int greenOffset, blueOffset, alphaOffset;
|
3909 |
int wLeft, hLeft;
|
3910 |
int wCopy, hCopy;
|
3911 |
int blockWid, blockHt;
|
3912 |
unsigned char *srcPtr, *srcLinePtr, *srcOrigPtr;
|
3913 |
unsigned char *destPtr, *destLinePtr;
|
3914 |
int pitch;
|
3915 |
int xRepeat, yRepeat;
|
3916 |
int blockXSkip, blockYSkip;
|
3917 |
XRectangle rect;
|
3918 |
|
3919 |
if ((zoomX == 1) && (zoomY == 1) && (subsampleX == 1)
|
3920 |
&& (subsampleY == 1)) {
|
3921 |
Tk_PhotoPutBlock(handle, blockPtr, x, y, width, height);
|
3922 |
return;
|
3923 |
}
|
3924 |
|
3925 |
masterPtr = (PhotoMaster *) handle;
|
3926 |
|
3927 |
if ((zoomX <= 0) || (zoomY <= 0))
|
3928 |
return;
|
3929 |
if ((masterPtr->userWidth != 0) && ((x + width) > masterPtr->userWidth)) {
|
3930 |
width = masterPtr->userWidth - x;
|
3931 |
}
|
3932 |
if ((masterPtr->userHeight != 0)
|
3933 |
&& ((y + height) > masterPtr->userHeight)) {
|
3934 |
height = masterPtr->userHeight - y;
|
3935 |
}
|
3936 |
if ((width <= 0) || (height <= 0))
|
3937 |
return;
|
3938 |
|
3939 |
xEnd = x + width;
|
3940 |
yEnd = y + height;
|
3941 |
if ((xEnd > masterPtr->width) || (yEnd > masterPtr->height)) {
|
3942 |
int sameSrc = (blockPtr->pixelPtr == masterPtr->pix24);
|
3943 |
ImgPhotoSetSize(masterPtr, MAX(xEnd, masterPtr->width),
|
3944 |
MAX(yEnd, masterPtr->height));
|
3945 |
if (sameSrc) {
|
3946 |
blockPtr->pixelPtr = masterPtr->pix24;
|
3947 |
}
|
3948 |
}
|
3949 |
|
3950 |
if ((y < masterPtr->ditherY) || ((y == masterPtr->ditherY)
|
3951 |
&& (x < masterPtr->ditherX))) {
|
3952 |
/*
|
3953 |
* The dithering isn't correct past the start of this block.
|
3954 |
*/
|
3955 |
|
3956 |
masterPtr->ditherX = x;
|
3957 |
masterPtr->ditherY = y;
|
3958 |
}
|
3959 |
|
3960 |
/*
|
3961 |
* If this image block could have different red, green and blue
|
3962 |
* components, mark it as a color image.
|
3963 |
*/
|
3964 |
|
3965 |
greenOffset = blockPtr->offset[1] - blockPtr->offset[0];
|
3966 |
blueOffset = blockPtr->offset[2] - blockPtr->offset[0];
|
3967 |
alphaOffset = blockPtr->offset[3];
|
3968 |
if ((alphaOffset >= blockPtr->pixelSize) || (alphaOffset < 0)) {
|
3969 |
alphaOffset = 0;
|
3970 |
} else {
|
3971 |
alphaOffset -= blockPtr->offset[0];
|
3972 |
}
|
3973 |
if ((greenOffset != 0) || (blueOffset != 0)) {
|
3974 |
masterPtr->flags |= COLOR_IMAGE;
|
3975 |
}
|
3976 |
|
3977 |
/*
|
3978 |
* Work out what area the pixel data in the block expands to after
|
3979 |
* subsampling and zooming.
|
3980 |
*/
|
3981 |
|
3982 |
blockXSkip = subsampleX * blockPtr->pixelSize;
|
3983 |
blockYSkip = subsampleY * blockPtr->pitch;
|
3984 |
if (subsampleX > 0)
|
3985 |
blockWid = ((blockPtr->width + subsampleX - 1) / subsampleX) * zoomX;
|
3986 |
else if (subsampleX == 0)
|
3987 |
blockWid = width;
|
3988 |
else
|
3989 |
blockWid = ((blockPtr->width - subsampleX - 1) / -subsampleX) * zoomX;
|
3990 |
if (subsampleY > 0)
|
3991 |
blockHt = ((blockPtr->height + subsampleY - 1) / subsampleY) * zoomY;
|
3992 |
else if (subsampleY == 0)
|
3993 |
blockHt = height;
|
3994 |
else
|
3995 |
blockHt = ((blockPtr->height - subsampleY - 1) / -subsampleY) * zoomY;
|
3996 |
|
3997 |
/*
|
3998 |
* Copy the data into our local 24-bit/pixel array.
|
3999 |
*/
|
4000 |
|
4001 |
destLinePtr = masterPtr->pix24 + (y * masterPtr->width + x) * 4;
|
4002 |
srcOrigPtr = blockPtr->pixelPtr + blockPtr->offset[0];
|
4003 |
if (subsampleX < 0) {
|
4004 |
srcOrigPtr += (blockPtr->width - 1) * blockPtr->pixelSize;
|
4005 |
}
|
4006 |
if (subsampleY < 0) {
|
4007 |
srcOrigPtr += (blockPtr->height - 1) * blockPtr->pitch;
|
4008 |
}
|
4009 |
|
4010 |
pitch = masterPtr->width * 4;
|
4011 |
for (hLeft = height; hLeft > 0; ) {
|
4012 |
hCopy = MIN(hLeft, blockHt);
|
4013 |
hLeft -= hCopy;
|
4014 |
yRepeat = zoomY;
|
4015 |
srcLinePtr = srcOrigPtr;
|
4016 |
for (; hCopy > 0; --hCopy) {
|
4017 |
destPtr = destLinePtr;
|
4018 |
for (wLeft = width; wLeft > 0;) {
|
4019 |
wCopy = MIN(wLeft, blockWid);
|
4020 |
wLeft -= wCopy;
|
4021 |
srcPtr = srcLinePtr;
|
4022 |
for (; wCopy > 0; wCopy -= zoomX) {
|
4023 |
for (xRepeat = MIN(wCopy, zoomX); xRepeat > 0; xRepeat--) {
|
4024 |
if (!destPtr[3]) {
|
4025 |
destPtr[0] = destPtr[1] = destPtr[2] = 0xd9;
|
4026 |
}
|
4027 |
if (!alphaOffset || (srcPtr[alphaOffset] == 255)) {
|
4028 |
*destPtr++ = srcPtr[0];
|
4029 |
*destPtr++ = srcPtr[greenOffset];
|
4030 |
*destPtr++ = srcPtr[blueOffset];
|
4031 |
*destPtr++ = 255;
|
4032 |
} else {
|
4033 |
if (srcPtr[alphaOffset]) {
|
4034 |
destPtr[0] += (srcPtr[0] - destPtr[0]) * srcPtr[alphaOffset] / 255;
|
4035 |
destPtr[1] += (srcPtr[greenOffset] - destPtr[1]) * srcPtr[alphaOffset] / 255;
|
4036 |
destPtr[2] += (srcPtr[blueOffset] - destPtr[2]) * srcPtr[alphaOffset] / 255;
|
4037 |
destPtr[3] += (255 - destPtr[3]) * srcPtr[alphaOffset] / 255;
|
4038 |
}
|
4039 |
destPtr+=4;
|
4040 |
}
|
4041 |
}
|
4042 |
srcPtr += blockXSkip;
|
4043 |
}
|
4044 |
}
|
4045 |
destLinePtr += pitch;
|
4046 |
yRepeat--;
|
4047 |
if (yRepeat <= 0) {
|
4048 |
srcLinePtr += blockYSkip;
|
4049 |
yRepeat = zoomY;
|
4050 |
}
|
4051 |
}
|
4052 |
}
|
4053 |
|
4054 |
/*
|
4055 |
* Add this new block to the region that specifies which data is valid.
|
4056 |
*/
|
4057 |
|
4058 |
if (alphaOffset) {
|
4059 |
int x1, y1, end;
|
4060 |
|
4061 |
destLinePtr = masterPtr->pix24 + (y * masterPtr->width + x) * 4 + 3;
|
4062 |
for (y1 = 0; y1 < height; y1++) {
|
4063 |
x1 = 0;
|
4064 |
destPtr = destLinePtr;
|
4065 |
while (x1 < width) {
|
4066 |
/* search for first non-transparent pixel */
|
4067 |
while ((x1 < width) && !*destPtr) {
|
4068 |
x1++; destPtr += 4;
|
4069 |
}
|
4070 |
end = x1;
|
4071 |
/* search for first transparent pixel */
|
4072 |
while ((end < width) && *destPtr) {
|
4073 |
end++; destPtr += 4;
|
4074 |
}
|
4075 |
if (end > x1) {
|
4076 |
rect.x = x + x1;
|
4077 |
rect.y = y + y1;
|
4078 |
rect.width = end - x1;
|
4079 |
rect.height = 1;
|
4080 |
TkUnionRectWithRegion(&rect, masterPtr->validRegion,
|
4081 |
masterPtr->validRegion);
|
4082 |
}
|
4083 |
x1 = end;
|
4084 |
}
|
4085 |
destLinePtr += masterPtr->width * 4;
|
4086 |
}
|
4087 |
} else {
|
4088 |
rect.x = x;
|
4089 |
rect.y = y;
|
4090 |
rect.width = width;
|
4091 |
rect.height = height;
|
4092 |
TkUnionRectWithRegion(&rect, masterPtr->validRegion,
|
4093 |
masterPtr->validRegion);
|
4094 |
}
|
4095 |
|
4096 |
/*
|
4097 |
* Update each instance.
|
4098 |
*/
|
4099 |
|
4100 |
Tk_DitherPhoto((Tk_PhotoHandle)masterPtr, x, y, width, height);
|
4101 |
|
4102 |
/*
|
4103 |
* Tell the core image code that this image has changed.
|
4104 |
*/
|
4105 |
|
4106 |
Tk_ImageChanged(masterPtr->tkMaster, x, y, width, height, masterPtr->width,
|
4107 |
masterPtr->height);
|
4108 |
}
|
4109 |
|
4110 |
/*
|
4111 |
*----------------------------------------------------------------------
|
4112 |
*
|
4113 |
* Tk_DitherPhoto --
|
4114 |
*
|
4115 |
* This procedure is called to update an area of each instance's
|
4116 |
* pixmap by dithering the corresponding area of the image master.
|
4117 |
*
|
4118 |
* Results:
|
4119 |
* None.
|
4120 |
*
|
4121 |
* Side effects:
|
4122 |
* The pixmap of each instance of this image gets updated.
|
4123 |
* The fields in *masterPtr indicating which area of the image
|
4124 |
* is correctly dithered get updated.
|
4125 |
*
|
4126 |
*----------------------------------------------------------------------
|
4127 |
*/
|
4128 |
|
4129 |
void
|
4130 |
Tk_DitherPhoto(photo, x, y, width, height)
|
4131 |
Tk_PhotoHandle photo; /* Image master whose instances are
|
4132 |
* to be updated. */
|
4133 |
int x, y; /* Coordinates of the top-left pixel
|
4134 |
* in the area to be dithered. */
|
4135 |
int width, height; /* Dimensions of the area to be dithered. */
|
4136 |
{
|
4137 |
PhotoMaster *masterPtr = (PhotoMaster *) photo;
|
4138 |
PhotoInstance *instancePtr;
|
4139 |
|
4140 |
if ((width <= 0) || (height <= 0)) {
|
4141 |
return;
|
4142 |
}
|
4143 |
|
4144 |
for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
|
4145 |
instancePtr = instancePtr->nextPtr) {
|
4146 |
DitherInstance(instancePtr, x, y, width, height);
|
4147 |
}
|
4148 |
|
4149 |
/*
|
4150 |
* Work out whether this block will be correctly dithered
|
4151 |
* and whether it will extend the correctly dithered region.
|
4152 |
*/
|
4153 |
|
4154 |
if (((y < masterPtr->ditherY)
|
4155 |
|| ((y == masterPtr->ditherY) && (x <= masterPtr->ditherX)))
|
4156 |
&& ((y + height) > (masterPtr->ditherY))) {
|
4157 |
|
4158 |
/*
|
4159 |
* This block starts inside (or immediately after) the correctly
|
4160 |
* dithered region, so the first scan line at least will be right.
|
4161 |
* Furthermore this block extends into scanline masterPtr->ditherY.
|
4162 |
*/
|
4163 |
|
4164 |
if ((x == 0) && (width == masterPtr->width)) {
|
4165 |
/*
|
4166 |
* We are doing the full width, therefore the dithering
|
4167 |
* will be correct to the end.
|
4168 |
*/
|
4169 |
|
4170 |
masterPtr->ditherX = 0;
|
4171 |
masterPtr->ditherY = y + height;
|
4172 |
} else {
|
4173 |
/*
|
4174 |
* We are doing partial scanlines, therefore the
|
4175 |
* correctly-dithered region will be extended by
|
4176 |
* at most one scan line.
|
4177 |
*/
|
4178 |
|
4179 |
if (x <= masterPtr->ditherX) {
|
4180 |
masterPtr->ditherX = x + width;
|
4181 |
if (masterPtr->ditherX >= masterPtr->width) {
|
4182 |
masterPtr->ditherX = 0;
|
4183 |
masterPtr->ditherY++;
|
4184 |
}
|
4185 |
}
|
4186 |
}
|
4187 |
}
|
4188 |
|
4189 |
}
|
4190 |
|
4191 |
/*
|
4192 |
*----------------------------------------------------------------------
|
4193 |
*
|
4194 |
* DitherInstance --
|
4195 |
*
|
4196 |
* This procedure is called to update an area of an instance's
|
4197 |
* pixmap by dithering the corresponding area of the master.
|
4198 |
*
|
4199 |
* Results:
|
4200 |
* None.
|
4201 |
*
|
4202 |
* Side effects:
|
4203 |
* The instance's pixmap gets updated.
|
4204 |
*
|
4205 |
*----------------------------------------------------------------------
|
4206 |
*/
|
4207 |
|
4208 |
static void
|
4209 |
DitherInstance(instancePtr, xStart, yStart, width, height)
|
4210 |
PhotoInstance *instancePtr; /* The instance to be updated. */
|
4211 |
int xStart, yStart; /* Coordinates of the top-left pixel in the
|
4212 |
* block to be dithered. */
|
4213 |
int width, height; /* Dimensions of the block to be dithered. */
|
4214 |
{
|
4215 |
PhotoMaster *masterPtr;
|
4216 |
ColorTable *colorPtr;
|
4217 |
XImage *imagePtr;
|
4218 |
int nLines, bigEndian;
|
4219 |
int i, c, x, y;
|
4220 |
int xEnd, yEnd;
|
4221 |
int bitsPerPixel, bytesPerLine, lineLength;
|
4222 |
unsigned char *srcLinePtr, *srcPtr;
|
4223 |
schar *errLinePtr, *errPtr;
|
4224 |
unsigned char *destBytePtr, *dstLinePtr;
|
4225 |
pixel *destLongPtr;
|
4226 |
pixel firstBit, word, mask;
|
4227 |
int col[3];
|
4228 |
int doDithering = 1;
|
4229 |
|
4230 |
colorPtr = instancePtr->colorTablePtr;
|
4231 |
masterPtr = instancePtr->masterPtr;
|
4232 |
|
4233 |
/*
|
4234 |
* Turn dithering off in certain cases where it is not
|
4235 |
* needed (TrueColor, DirectColor with many colors).
|
4236 |
*/
|
4237 |
|
4238 |
if ((colorPtr->visualInfo.class == DirectColor)
|
4239 |
|| (colorPtr->visualInfo.class == TrueColor)) {
|
4240 |
int nRed, nGreen, nBlue, result;
|
4241 |
|
4242 |
result = sscanf(colorPtr->id.palette, "%d/%d/%d", &nRed,
|
4243 |
&nGreen, &nBlue);
|
4244 |
if ((nRed >= 256)
|
4245 |
&& ((result == 1) || ((nGreen >= 256) && (nBlue >= 256)))) {
|
4246 |
doDithering = 0;
|
4247 |
}
|
4248 |
}
|
4249 |
|
4250 |
/*
|
4251 |
* First work out how many lines to do at a time,
|
4252 |
* then how many bytes we'll need for pixel storage,
|
4253 |
* and allocate it.
|
4254 |
*/
|
4255 |
|
4256 |
nLines = (MAX_PIXELS + width - 1) / width;
|
4257 |
if (nLines < 1) {
|
4258 |
nLines = 1;
|
4259 |
}
|
4260 |
if (nLines > height ) {
|
4261 |
nLines = height;
|
4262 |
}
|
4263 |
|
4264 |
imagePtr = instancePtr->imagePtr;
|
4265 |
if (imagePtr == NULL) {
|
4266 |
return; /* we must be really tight on memory */
|
4267 |
}
|
4268 |
bitsPerPixel = imagePtr->bits_per_pixel;
|
4269 |
bytesPerLine = ((bitsPerPixel * width + 31) >> 3) & ~3;
|
4270 |
imagePtr->width = width;
|
4271 |
imagePtr->height = nLines;
|
4272 |
imagePtr->bytes_per_line = bytesPerLine;
|
4273 |
imagePtr->data = (char *) ckalloc((unsigned) (imagePtr->bytes_per_line * nLines));
|
4274 |
bigEndian = imagePtr->bitmap_bit_order == MSBFirst;
|
4275 |
firstBit = bigEndian? (1 << (imagePtr->bitmap_unit - 1)): 1;
|
4276 |
|
4277 |
lineLength = masterPtr->width * 3;
|
4278 |
srcLinePtr = masterPtr->pix24 + (yStart * masterPtr->width + xStart) * 4;
|
4279 |
errLinePtr = instancePtr->error + yStart * lineLength + xStart * 3;
|
4280 |
xEnd = xStart + width;
|
4281 |
|
4282 |
/*
|
4283 |
* Loop over the image, doing at most nLines lines before
|
4284 |
* updating the screen image.
|
4285 |
*/
|
4286 |
|
4287 |
for (; height > 0; height -= nLines) {
|
4288 |
if (nLines > height) {
|
4289 |
nLines = height;
|
4290 |
}
|
4291 |
dstLinePtr = (unsigned char *) imagePtr->data;
|
4292 |
yEnd = yStart + nLines;
|
4293 |
for (y = yStart; y < yEnd; ++y) {
|
4294 |
srcPtr = srcLinePtr;
|
4295 |
errPtr = errLinePtr;
|
4296 |
destBytePtr = dstLinePtr;
|
4297 |
destLongPtr = (pixel *) dstLinePtr;
|
4298 |
if (colorPtr->flags & COLOR_WINDOW) {
|
4299 |
/*
|
4300 |
* Color window. We dither the three components
|
4301 |
* independently, using Floyd-Steinberg dithering,
|
4302 |
* which propagates errors from the quantization of
|
4303 |
* pixels to the pixels below and to the right.
|
4304 |
*/
|
4305 |
|
4306 |
for (x = xStart; x < xEnd; ++x) {
|
4307 |
if (doDithering) {
|
4308 |
for (i = 0; i < 3; ++i) {
|
4309 |
/*
|
4310 |
* Compute the error propagated into this pixel
|
4311 |
* for this component.
|
4312 |
* If e[x,y] is the array of quantization error
|
4313 |
* values, we compute
|
4314 |
* 7/16 * e[x-1,y] + 1/16 * e[x-1,y-1]
|
4315 |
* + 5/16 * e[x,y-1] + 3/16 * e[x+1,y-1]
|
4316 |
* and round it to an integer.
|
4317 |
*
|
4318 |
* The expression ((c + 2056) >> 4) - 128
|
4319 |
* computes round(c / 16), and works correctly on
|
4320 |
* machines without a sign-extending right shift.
|
4321 |
*/
|
4322 |
|
4323 |
c = (x > 0) ? errPtr[-3] * 7: 0;
|
4324 |
if (y > 0) {
|
4325 |
if (x > 0) {
|
4326 |
c += errPtr[-lineLength-3];
|
4327 |
}
|
4328 |
c += errPtr[-lineLength] * 5;
|
4329 |
if ((x + 1) < masterPtr->width) {
|
4330 |
c += errPtr[-lineLength+3] * 3;
|
4331 |
}
|
4332 |
}
|
4333 |
|
4334 |
/*
|
4335 |
* Add the propagated error to the value of this
|
4336 |
* component, quantize it, and store the
|
4337 |
* quantization error.
|
4338 |
*/
|
4339 |
|
4340 |
c = ((c + 2056) >> 4) - 128 + *srcPtr++;
|
4341 |
if (c < 0) {
|
4342 |
c = 0;
|
4343 |
} else if (c > 255) {
|
4344 |
c = 255;
|
4345 |
}
|
4346 |
col[i] = colorPtr->colorQuant[i][c];
|
4347 |
*errPtr++ = c - col[i];
|
4348 |
}
|
4349 |
} else {
|
4350 |
/*
|
4351 |
* Output is virtually continuous in this case,
|
4352 |
* so don't bother dithering.
|
4353 |
*/
|
4354 |
|
4355 |
col[0] = *srcPtr++;
|
4356 |
col[1] = *srcPtr++;
|
4357 |
col[2] = *srcPtr++;
|
4358 |
}
|
4359 |
srcPtr++;
|
4360 |
|
4361 |
/*
|
4362 |
* Translate the quantized component values into
|
4363 |
* an X pixel value, and store it in the image.
|
4364 |
*/
|
4365 |
|
4366 |
i = colorPtr->redValues[col[0]]
|
4367 |
+ colorPtr->greenValues[col[1]]
|
4368 |
+ colorPtr->blueValues[col[2]];
|
4369 |
if (colorPtr->flags & MAP_COLORS) {
|
4370 |
i = colorPtr->pixelMap[i];
|
4371 |
}
|
4372 |
switch (bitsPerPixel) {
|
4373 |
case NBBY:
|
4374 |
*destBytePtr++ = i;
|
4375 |
break;
|
4376 |
#ifndef __WIN32__
|
4377 |
/*
|
4378 |
* This case is not valid for Windows because the image format is different
|
4379 |
* from the pixel format in Win32. Eventually we need to fix the image
|
4380 |
* code in Tk to use the Windows native image ordering. This would speed
|
4381 |
* up the image code for all of the common sizes.
|
4382 |
*/
|
4383 |
|
4384 |
case NBBY * sizeof(pixel):
|
4385 |
*destLongPtr++ = i;
|
4386 |
break;
|
4387 |
#endif
|
4388 |
default:
|
4389 |
XPutPixel(imagePtr, x - xStart, y - yStart,
|
4390 |
(unsigned) i);
|
4391 |
}
|
4392 |
}
|
4393 |
|
4394 |
} else if (bitsPerPixel > 1) {
|
4395 |
/*
|
4396 |
* Multibit monochrome window. The operation here is similar
|
4397 |
* to the color window case above, except that there is only
|
4398 |
* one component. If the master image is in color, use the
|
4399 |
* luminance computed as
|
4400 |
* 0.344 * red + 0.5 * green + 0.156 * blue.
|
4401 |
*/
|
4402 |
|
4403 |
for (x = xStart; x < xEnd; ++x) {
|
4404 |
c = (x > 0) ? errPtr[-1] * 7: 0;
|
4405 |
if (y > 0) {
|
4406 |
if (x > 0) {
|
4407 |
c += errPtr[-lineLength-1];
|
4408 |
}
|
4409 |
c += errPtr[-lineLength] * 5;
|
4410 |
if (x + 1 < masterPtr->width) {
|
4411 |
c += errPtr[-lineLength+1] * 3;
|
4412 |
}
|
4413 |
}
|
4414 |
c = ((c + 2056) >> 4) - 128;
|
4415 |
|
4416 |
if ((masterPtr->flags & COLOR_IMAGE) == 0) {
|
4417 |
c += srcPtr[0];
|
4418 |
} else {
|
4419 |
c += (unsigned)(srcPtr[0] * 11 + srcPtr[1] * 16
|
4420 |
+ srcPtr[2] * 5 + 16) >> 5;
|
4421 |
}
|
4422 |
srcPtr += 4;
|
4423 |
|
4424 |
if (c < 0) {
|
4425 |
c = 0;
|
4426 |
} else if (c > 255) {
|
4427 |
c = 255;
|
4428 |
}
|
4429 |
i = colorPtr->colorQuant[0][c];
|
4430 |
*errPtr++ = c - i;
|
4431 |
i = colorPtr->redValues[i];
|
4432 |
switch (bitsPerPixel) {
|
4433 |
case NBBY:
|
4434 |
*destBytePtr++ = i;
|
4435 |
break;
|
4436 |
#ifndef __WIN32__
|
4437 |
/*
|
4438 |
* This case is not valid for Windows because the image format is different
|
4439 |
* from the pixel format in Win32. Eventually we need to fix the image
|
4440 |
* code in Tk to use the Windows native image ordering. This would speed
|
4441 |
* up the image code for all of the common sizes.
|
4442 |
*/
|
4443 |
|
4444 |
case NBBY * sizeof(pixel):
|
4445 |
*destLongPtr++ = i;
|
4446 |
break;
|
4447 |
#endif
|
4448 |
default:
|
4449 |
XPutPixel(imagePtr, x - xStart, y - yStart,
|
4450 |
(unsigned) i);
|
4451 |
}
|
4452 |
}
|
4453 |
} else {
|
4454 |
/*
|
4455 |
* 1-bit monochrome window. This is similar to the
|
4456 |
* multibit monochrome case above, except that the
|
4457 |
* quantization is simpler (we only have black = 0
|
4458 |
* and white = 255), and we produce an XY-Bitmap.
|
4459 |
*/
|
4460 |
|
4461 |
word = 0;
|
4462 |
mask = firstBit;
|
4463 |
for (x = xStart; x < xEnd; ++x) {
|
4464 |
/*
|
4465 |
* If we have accumulated a whole word, store it
|
4466 |
* in the image and start a new word.
|
4467 |
*/
|
4468 |
|
4469 |
if (mask == 0) {
|
4470 |
*destLongPtr++ = word;
|
4471 |
mask = firstBit;
|
4472 |
word = 0;
|
4473 |
}
|
4474 |
|
4475 |
c = (x > 0) ? errPtr[-1] * 7: 0;
|
4476 |
if (y > 0) {
|
4477 |
if (x > 0) {
|
4478 |
c += errPtr[-lineLength-1];
|
4479 |
}
|
4480 |
c += errPtr[-lineLength] * 5;
|
4481 |
if (x + 1 < masterPtr->width) {
|
4482 |
c += errPtr[-lineLength+1] * 3;
|
4483 |
}
|
4484 |
}
|
4485 |
c = ((c + 2056) >> 4) - 128;
|
4486 |
|
4487 |
if ((masterPtr->flags & COLOR_IMAGE) == 0) {
|
4488 |
c += srcPtr[0];
|
4489 |
} else {
|
4490 |
c += (unsigned)(srcPtr[0] * 11 + srcPtr[1] * 16
|
4491 |
+ srcPtr[2] * 5 + 16) >> 5;
|
4492 |
}
|
4493 |
srcPtr += 4;
|
4494 |
|
4495 |
if (c < 0) {
|
4496 |
c = 0;
|
4497 |
} else if (c > 255) {
|
4498 |
c = 255;
|
4499 |
}
|
4500 |
if (c >= 128) {
|
4501 |
word |= mask;
|
4502 |
*errPtr++ = c - 255;
|
4503 |
} else {
|
4504 |
*errPtr++ = c;
|
4505 |
}
|
4506 |
mask = bigEndian? (mask >> 1): (mask << 1);
|
4507 |
}
|
4508 |
*destLongPtr = word;
|
4509 |
}
|
4510 |
srcLinePtr += masterPtr->width * 4;
|
4511 |
errLinePtr += lineLength;
|
4512 |
dstLinePtr += bytesPerLine;
|
4513 |
}
|
4514 |
|
4515 |
/*
|
4516 |
* Update the pixmap for this instance with the block of
|
4517 |
* pixels that we have just computed.
|
4518 |
*/
|
4519 |
|
4520 |
TkPutImage(colorPtr->pixelMap, colorPtr->numColors,
|
4521 |
instancePtr->display, instancePtr->pixels,
|
4522 |
instancePtr->gc, imagePtr, 0, 0, xStart, yStart,
|
4523 |
(unsigned) width, (unsigned) nLines);
|
4524 |
yStart = yEnd;
|
4525 |
|
4526 |
}
|
4527 |
|
4528 |
ckfree(imagePtr->data);
|
4529 |
imagePtr->data = NULL;
|
4530 |
}
|
4531 |
|
4532 |
/*
|
4533 |
*----------------------------------------------------------------------
|
4534 |
*
|
4535 |
* Tk_PhotoBlank --
|
4536 |
*
|
4537 |
* This procedure is called to clear an entire photo image.
|
4538 |
*
|
4539 |
* Results:
|
4540 |
* None.
|
4541 |
*
|
4542 |
* Side effects:
|
4543 |
* The valid region for the image is set to the null region.
|
4544 |
* The generic image code is notified that the image has changed.
|
4545 |
*
|
4546 |
*----------------------------------------------------------------------
|
4547 |
*/
|
4548 |
|
4549 |
void
|
4550 |
Tk_PhotoBlank(handle)
|
4551 |
Tk_PhotoHandle handle; /* Handle for the image to be blanked. */
|
4552 |
{
|
4553 |
PhotoMaster *masterPtr;
|
4554 |
PhotoInstance *instancePtr;
|
4555 |
|
4556 |
masterPtr = (PhotoMaster *) handle;
|
4557 |
masterPtr->ditherX = masterPtr->ditherY = 0;
|
4558 |
masterPtr->flags = 0;
|
4559 |
|
4560 |
/*
|
4561 |
* The image has valid data nowhere.
|
4562 |
*/
|
4563 |
|
4564 |
if (masterPtr->validRegion != NULL) {
|
4565 |
TkDestroyRegion(masterPtr->validRegion);
|
4566 |
}
|
4567 |
masterPtr->validRegion = TkCreateRegion();
|
4568 |
|
4569 |
/*
|
4570 |
* Clear out the 24-bit pixel storage array.
|
4571 |
* Clear out the dithering error arrays for each instance.
|
4572 |
*/
|
4573 |
|
4574 |
memset((VOID *) masterPtr->pix24, 0,
|
4575 |
(size_t) (masterPtr->width * masterPtr->height * 4));
|
4576 |
for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
|
4577 |
instancePtr = instancePtr->nextPtr) {
|
4578 |
if (instancePtr->error) {
|
4579 |
memset((VOID *) instancePtr->error, 0,
|
4580 |
(size_t) (masterPtr->width * masterPtr->height
|
4581 |
* 3 * sizeof(schar)));
|
4582 |
}
|
4583 |
}
|
4584 |
|
4585 |
/*
|
4586 |
* Tell the core image code that this image has changed.
|
4587 |
*/
|
4588 |
|
4589 |
Tk_ImageChanged(masterPtr->tkMaster, 0, 0, masterPtr->width,
|
4590 |
masterPtr->height, masterPtr->width, masterPtr->height);
|
4591 |
}
|
4592 |
|
4593 |
/*
|
4594 |
*----------------------------------------------------------------------
|
4595 |
*
|
4596 |
* Tk_PhotoExpand --
|
4597 |
*
|
4598 |
* This procedure is called to request that a photo image be
|
4599 |
* expanded if necessary to be at least `width' pixels wide and
|
4600 |
* `height' pixels high. If the user has declared a definite
|
4601 |
* image size (using the -width and -height configuration
|
4602 |
* options) then this call has no effect.
|
4603 |
*
|
4604 |
* Results:
|
4605 |
* None.
|
4606 |
*
|
4607 |
* Side effects:
|
4608 |
* The size of the photo image may change; if so the generic
|
4609 |
* image code is informed.
|
4610 |
*
|
4611 |
*----------------------------------------------------------------------
|
4612 |
*/
|
4613 |
|
4614 |
void
|
4615 |
Tk_PhotoExpand(handle, width, height)
|
4616 |
Tk_PhotoHandle handle; /* Handle for the image to be expanded. */
|
4617 |
int width, height; /* Desired minimum dimensions of the image. */
|
4618 |
{
|
4619 |
PhotoMaster *masterPtr;
|
4620 |
|
4621 |
masterPtr = (PhotoMaster *) handle;
|
4622 |
|
4623 |
if (width <= masterPtr->width) {
|
4624 |
width = masterPtr->width;
|
4625 |
}
|
4626 |
if (height <= masterPtr->height) {
|
4627 |
height = masterPtr->height;
|
4628 |
}
|
4629 |
if ((width != masterPtr->width) || (height != masterPtr->height)) {
|
4630 |
ImgPhotoSetSize(masterPtr, MAX(width, masterPtr->width),
|
4631 |
MAX(height, masterPtr->height));
|
4632 |
Tk_ImageChanged(masterPtr->tkMaster, 0, 0, 0, 0, masterPtr->width,
|
4633 |
masterPtr->height);
|
4634 |
}
|
4635 |
}
|
4636 |
|
4637 |
/*
|
4638 |
*----------------------------------------------------------------------
|
4639 |
*
|
4640 |
* Tk_PhotoGetSize --
|
4641 |
*
|
4642 |
* This procedure is called to obtain the current size of a photo
|
4643 |
* image.
|
4644 |
*
|
4645 |
* Results:
|
4646 |
* The image's width and height are returned in *widthp
|
4647 |
* and *heightp.
|
4648 |
*
|
4649 |
* Side effects:
|
4650 |
* None.
|
4651 |
*
|
4652 |
*----------------------------------------------------------------------
|
4653 |
*/
|
4654 |
|
4655 |
void
|
4656 |
Tk_PhotoGetSize(handle, widthPtr, heightPtr)
|
4657 |
Tk_PhotoHandle handle; /* Handle for the image whose dimensions
|
4658 |
* are requested. */
|
4659 |
int *widthPtr, *heightPtr; /* The dimensions of the image are returned
|
4660 |
* here. */
|
4661 |
{
|
4662 |
PhotoMaster *masterPtr;
|
4663 |
|
4664 |
masterPtr = (PhotoMaster *) handle;
|
4665 |
*widthPtr = masterPtr->width;
|
4666 |
*heightPtr = masterPtr->height;
|
4667 |
}
|
4668 |
|
4669 |
/*
|
4670 |
*----------------------------------------------------------------------
|
4671 |
*
|
4672 |
* Tk_PhotoSetSize --
|
4673 |
*
|
4674 |
* This procedure is called to set size of a photo image.
|
4675 |
* This call is equivalent to using the -width and -height
|
4676 |
* configuration options.
|
4677 |
*
|
4678 |
* Results:
|
4679 |
* None.
|
4680 |
*
|
4681 |
* Side effects:
|
4682 |
* The size of the image may change; if so the generic
|
4683 |
* image code is informed.
|
4684 |
*
|
4685 |
*----------------------------------------------------------------------
|
4686 |
*/
|
4687 |
|
4688 |
void
|
4689 |
Tk_PhotoSetSize(handle, width, height)
|
4690 |
Tk_PhotoHandle handle; /* Handle for the image whose size is to
|
4691 |
* be set. */
|
4692 |
int width, height; /* New dimensions for the image. */
|
4693 |
{
|
4694 |
PhotoMaster *masterPtr;
|
4695 |
|
4696 |
masterPtr = (PhotoMaster *) handle;
|
4697 |
|
4698 |
masterPtr->userWidth = width;
|
4699 |
masterPtr->userHeight = height;
|
4700 |
ImgPhotoSetSize(masterPtr, ((width > 0) ? width: masterPtr->width),
|
4701 |
((height > 0) ? height: masterPtr->height));
|
4702 |
Tk_ImageChanged(masterPtr->tkMaster, 0, 0, 0, 0,
|
4703 |
masterPtr->width, masterPtr->height);
|
4704 |
}
|
4705 |
|
4706 |
/*
|
4707 |
*----------------------------------------------------------------------
|
4708 |
*
|
4709 |
* ImgGetPhoto --
|
4710 |
*
|
4711 |
* This procedure is called to obtain image data from a photo
|
4712 |
* image. This procedure fills in the Tk_PhotoImageBlock structure
|
4713 |
* pointed to by `blockPtr' with details of the address and
|
4714 |
* layout of the image data in memory.
|
4715 |
*
|
4716 |
* Results:
|
4717 |
* A pointer to the allocated data which should be freed later.
|
4718 |
* NULL if there is no need to free data because
|
4719 |
* blockPtr->pixelPtr points directly to the image data.
|
4720 |
*
|
4721 |
* Side effects:
|
4722 |
* None.
|
4723 |
*
|
4724 |
*----------------------------------------------------------------------
|
4725 |
*/
|
4726 |
|
4727 |
static char *
|
4728 |
ImgGetPhoto(masterPtr, blockPtr, optPtr)
|
4729 |
PhotoMaster *masterPtr; /* Handle for the photo image from which
|
4730 |
* image data is desired. */
|
4731 |
Tk_PhotoImageBlock *blockPtr;
|
4732 |
/* Information about the address and layout
|
4733 |
* of the image data is returned here. */
|
4734 |
struct SubcommandOptions *optPtr;
|
4735 |
{
|
4736 |
unsigned char *pixelPtr;
|
4737 |
int x, y, greenOffset, blueOffset, alphaOffset;
|
4738 |
|
4739 |
Tk_PhotoGetImage((Tk_PhotoHandle) masterPtr, blockPtr);
|
4740 |
blockPtr->pixelPtr += optPtr->fromY * blockPtr->pitch
|
4741 |
+ optPtr->fromX * blockPtr->pixelSize;
|
4742 |
blockPtr->width = optPtr->fromX2 - optPtr->fromX;
|
4743 |
blockPtr->height = optPtr->fromY2 - optPtr->fromY;
|
4744 |
|
4745 |
if (!(masterPtr->flags & COLOR_IMAGE) &&
|
4746 |
(!(optPtr->options & OPT_BACKGROUND)
|
4747 |
|| ((optPtr->background->red == optPtr->background->green)
|
4748 |
&& (optPtr->background->red == optPtr->background->blue)))) {
|
4749 |
blockPtr->offset[0] = blockPtr->offset[1] =
|
4750 |
blockPtr->offset[2];
|
4751 |
}
|
4752 |
alphaOffset = 0;
|
4753 |
for (y = 0; y < blockPtr->height; y++) {
|
4754 |
pixelPtr = blockPtr->pixelPtr + (y * blockPtr->pitch)
|
4755 |
+ blockPtr->pixelSize - 1;
|
4756 |
for (x = 0; x < blockPtr->width; x++) {
|
4757 |
if (*pixelPtr != 255) {
|
4758 |
alphaOffset = 3; break;
|
4759 |
}
|
4760 |
pixelPtr += blockPtr->pixelSize;
|
4761 |
}
|
4762 |
if (alphaOffset) break;
|
4763 |
}
|
4764 |
if (!alphaOffset) {
|
4765 |
blockPtr->pixelPtr--;
|
4766 |
blockPtr->offset[0]++;
|
4767 |
blockPtr->offset[1]++;
|
4768 |
blockPtr->offset[2]++;
|
4769 |
}
|
4770 |
greenOffset = blockPtr->offset[1] - blockPtr->offset[0];
|
4771 |
blueOffset = blockPtr->offset[2] - blockPtr->offset[0];
|
4772 |
if (((optPtr->options & OPT_BACKGROUND) && alphaOffset) ||
|
4773 |
((optPtr->options & OPT_GRAYSCALE) && (greenOffset || blueOffset))) {
|
4774 |
int newPixelSize,x,y;
|
4775 |
unsigned char *srcPtr, *destPtr;
|
4776 |
char *data;
|
4777 |
|
4778 |
newPixelSize = (!(optPtr->options & OPT_BACKGROUND) && alphaOffset) ? 2 : 1;
|
4779 |
if ((greenOffset || blueOffset) && !(optPtr->options & OPT_GRAYSCALE)) {
|
4780 |
newPixelSize += 2;
|
4781 |
}
|
4782 |
data = ckalloc((unsigned int) (newPixelSize *
|
4783 |
blockPtr->width * blockPtr->height));
|
4784 |
srcPtr = blockPtr->pixelPtr + blockPtr->offset[0];
|
4785 |
destPtr = (unsigned char *) data;
|
4786 |
if (!greenOffset && !blueOffset) {
|
4787 |
for (y = blockPtr->height; y > 0; y--) {
|
4788 |
for (x = blockPtr->width; x > 0; x--) {
|
4789 |
*destPtr = *srcPtr;
|
4790 |
srcPtr += blockPtr->pixelSize;
|
4791 |
destPtr += newPixelSize;
|
4792 |
}
|
4793 |
srcPtr += blockPtr->pitch - (blockPtr->width * blockPtr->pixelSize);
|
4794 |
}
|
4795 |
} else if (optPtr->options & OPT_GRAYSCALE) {
|
4796 |
for (y = blockPtr->height; y > 0; y--) {
|
4797 |
for (x = blockPtr->width; x > 0; x--) {
|
4798 |
*destPtr = (unsigned char) ((srcPtr[0] * 11 + srcPtr[1] * 16
|
4799 |
+ srcPtr[2] * 5 + 16) >> 5);
|
4800 |
srcPtr += blockPtr->pixelSize;
|
4801 |
destPtr += newPixelSize;
|
4802 |
}
|
4803 |
srcPtr += blockPtr->pitch - (blockPtr->width * blockPtr->pixelSize);
|
4804 |
}
|
4805 |
} else {
|
4806 |
for (y = blockPtr->height; y > 0; y--) {
|
4807 |
for (x = blockPtr->width; x > 0; x--) {
|
4808 |
destPtr[0] = srcPtr[0];
|
4809 |
destPtr[1] = srcPtr[1];
|
4810 |
destPtr[2] = srcPtr[2];
|
4811 |
srcPtr += blockPtr->pixelSize;
|
4812 |
destPtr += newPixelSize;
|
4813 |
}
|
4814 |
srcPtr += blockPtr->pitch - (blockPtr->width * blockPtr->pixelSize);
|
4815 |
}
|
4816 |
}
|
4817 |
srcPtr = blockPtr->pixelPtr + alphaOffset;
|
4818 |
destPtr = (unsigned char *) data;
|
4819 |
if (!alphaOffset) {
|
4820 |
/* nothing to be done */
|
4821 |
} else if (optPtr->options & OPT_BACKGROUND) {
|
4822 |
if (newPixelSize > 2) {
|
4823 |
int red = optPtr->background->red>>8;
|
4824 |
int green = optPtr->background->green>>8;
|
4825 |
int blue = optPtr->background->blue>>8;
|
4826 |
for (y = blockPtr->height; y > 0; y--) {
|
4827 |
for (x = blockPtr->width; x > 0; x--) {
|
4828 |
destPtr[0] += (unsigned char) (((255 - *srcPtr) *
|
4829 |
(red-destPtr[0])) / 255);
|
4830 |
destPtr[1] += (unsigned char) (((255 - *srcPtr) *
|
4831 |
(green-destPtr[1])) / 255);
|
4832 |
destPtr[2] += (unsigned char) (((255 - *srcPtr) *
|
4833 |
(blue-destPtr[2])) / 255);
|
4834 |
srcPtr += blockPtr->pixelSize;
|
4835 |
destPtr += newPixelSize;
|
4836 |
}
|
4837 |
srcPtr += blockPtr->pitch - (blockPtr->width * blockPtr->pixelSize);
|
4838 |
}
|
4839 |
} else {
|
4840 |
int gray = (unsigned char) (((optPtr->background->red>>8) * 11
|
4841 |
+ (optPtr->background->green>>8) * 16
|
4842 |
+ (optPtr->background->blue>>8) * 5 + 16) >> 5);
|
4843 |
for (y = blockPtr->height; y > 0; y--) {
|
4844 |
for (x = blockPtr->width; x > 0; x--) {
|
4845 |
destPtr[0] += ((255 - *srcPtr) *
|
4846 |
(gray-destPtr[0])) / 255;
|
4847 |
srcPtr += blockPtr->pixelSize;
|
4848 |
destPtr += newPixelSize;
|
4849 |
}
|
4850 |
srcPtr += blockPtr->pitch - (blockPtr->width * blockPtr->pixelSize);
|
4851 |
}
|
4852 |
}
|
4853 |
} else {
|
4854 |
destPtr += newPixelSize-1;
|
4855 |
for (y = blockPtr->height; y > 0; y--) {
|
4856 |
for (x = blockPtr->width; x > 0; x--) {
|
4857 |
*destPtr = *srcPtr;
|
4858 |
srcPtr += blockPtr->pixelSize;
|
4859 |
destPtr += newPixelSize;
|
4860 |
}
|
4861 |
srcPtr += blockPtr->pitch - (blockPtr->width * blockPtr->pixelSize);
|
4862 |
}
|
4863 |
}
|
4864 |
blockPtr->pixelPtr = (unsigned char *) data;
|
4865 |
blockPtr->pixelSize = newPixelSize;
|
4866 |
blockPtr->pitch = newPixelSize * blockPtr->width;
|
4867 |
blockPtr->offset[0] = 0;
|
4868 |
if (newPixelSize>2) {
|
4869 |
blockPtr->offset[1]= 1;
|
4870 |
blockPtr->offset[2]= 2;
|
4871 |
} else {
|
4872 |
blockPtr->offset[1]= 0;
|
4873 |
blockPtr->offset[2]= 0;
|
4874 |
}
|
4875 |
return data;
|
4876 |
}
|
4877 |
return NULL;
|
4878 |
}
|
4879 |
|
4880 |
/*
|
4881 |
*----------------------------------------------------------------------
|
4882 |
*
|
4883 |
* ImgStringWrite --
|
4884 |
*
|
4885 |
* Default string write function. The data is formatted in
|
4886 |
* the default format as accepted by the "<img> put" command.
|
4887 |
*
|
4888 |
* Results:
|
4889 |
* A standard Tcl result.
|
4890 |
*
|
4891 |
* Side effects:
|
4892 |
* See the user documentation.
|
4893 |
*
|
4894 |
*----------------------------------------------------------------------
|
4895 |
*/
|
4896 |
|
4897 |
static int
|
4898 |
ImgStringWrite(interp, formatString, blockPtr)
|
4899 |
Tcl_Interp *interp;
|
4900 |
Tcl_Obj *formatString;
|
4901 |
Tk_PhotoImageBlock *blockPtr;
|
4902 |
{
|
4903 |
int row,col;
|
4904 |
char *line, *linePtr;
|
4905 |
unsigned char *pixelPtr;
|
4906 |
int greenOffset, blueOffset;
|
4907 |
Tcl_DString data;
|
4908 |
|
4909 |
greenOffset = blockPtr->offset[1] - blockPtr->offset[0];
|
4910 |
blueOffset = blockPtr->offset[2] - blockPtr->offset[0];
|
4911 |
|
4912 |
Tcl_DStringInit(&data);
|
4913 |
if ((blockPtr->width > 0) && (blockPtr->height > 0)) {
|
4914 |
line = (char *) ckalloc((unsigned int) ((8 * blockPtr->width) + 2));
|
4915 |
for (row=0; row<blockPtr->height; row++) {
|
4916 |
pixelPtr = blockPtr->pixelPtr + blockPtr->offset[0] +
|
4917 |
row * blockPtr->pitch;
|
4918 |
linePtr = line;
|
4919 |
for (col=0; col<blockPtr->width; col++) {
|
4920 |
sprintf(linePtr, " #%02x%02x%02x", *pixelPtr,
|
4921 |
pixelPtr[greenOffset], pixelPtr[blueOffset]);
|
4922 |
pixelPtr += blockPtr->pixelSize;
|
4923 |
linePtr += 8;
|
4924 |
}
|
4925 |
Tcl_DStringAppendElement(&data, line+1);
|
4926 |
}
|
4927 |
ckfree (line);
|
4928 |
}
|
4929 |
Tcl_DStringResult(interp, &data);
|
4930 |
return TCL_OK;
|
4931 |
}
|
4932 |
|
4933 |
/*
|
4934 |
*----------------------------------------------------------------------
|
4935 |
*
|
4936 |
* Tk_PhotoGetImage --
|
4937 |
*
|
4938 |
* This procedure is called to obtain image data from a photo
|
4939 |
* image. This procedure fills in the Tk_PhotoImageBlock structure
|
4940 |
* pointed to by `blockPtr' with details of the address and
|
4941 |
* layout of the image data in memory.
|
4942 |
*
|
4943 |
* Results:
|
4944 |
* TRUE (1) indicating that image data is available,
|
4945 |
* for backwards compatibility with the old photo widget.
|
4946 |
*
|
4947 |
* Side effects:
|
4948 |
* None.
|
4949 |
*
|
4950 |
*----------------------------------------------------------------------
|
4951 |
*/
|
4952 |
|
4953 |
int
|
4954 |
Tk_PhotoGetImage(handle, blockPtr)
|
4955 |
Tk_PhotoHandle handle; /* Handle for the photo image from which
|
4956 |
* image data is desired. */
|
4957 |
Tk_PhotoImageBlock *blockPtr;
|
4958 |
/* Information about the address and layout
|
4959 |
* of the image data is returned here. */
|
4960 |
{
|
4961 |
PhotoMaster *masterPtr;
|
4962 |
|
4963 |
masterPtr = (PhotoMaster *) handle;
|
4964 |
blockPtr->pixelPtr = masterPtr->pix24;
|
4965 |
blockPtr->width = masterPtr->width;
|
4966 |
blockPtr->height = masterPtr->height;
|
4967 |
blockPtr->pitch = masterPtr->width * 4;
|
4968 |
blockPtr->pixelSize = 4;
|
4969 |
blockPtr->offset[0] = 0;
|
4970 |
blockPtr->offset[1] = 1;
|
4971 |
blockPtr->offset[2] = 2;
|
4972 |
blockPtr->offset[3] = 3;
|
4973 |
return 1;
|
4974 |
}
|
4975 |
|
4976 |
/*
|
4977 |
*----------------------------------------------------------------------
|
4978 |
*
|
4979 |
* PhotoOptionFind --
|
4980 |
*
|
4981 |
* Finds a specific Photo option.
|
4982 |
*
|
4983 |
* Results:
|
4984 |
* None.
|
4985 |
*
|
4986 |
* Side effects:
|
4987 |
* After commands are removed.
|
4988 |
*
|
4989 |
*----------------------------------------------------------------------
|
4990 |
*/
|
4991 |
|
4992 |
typedef struct OptionAssocData {
|
4993 |
struct OptionAssocData *nextPtr; /* pointer to next OptionAssocData */
|
4994 |
Tcl_ObjCmdProc *command; /* command associated with this
|
4995 |
* option */
|
4996 |
char name[1]; /* name of option (remaining chars) */
|
4997 |
} OptionAssocData;
|
4998 |
|
4999 |
static Tcl_ObjCmdProc *
|
5000 |
PhotoOptionFind(interp, obj)
|
5001 |
Tcl_Interp *interp; /* Interpreter that is being deleted. */
|
5002 |
Tcl_Obj *obj; /* Name of option to be found. */
|
5003 |
{
|
5004 |
size_t length;
|
5005 |
char *name = Tcl_GetStringFromObj(obj, (int *) &length);
|
5006 |
OptionAssocData *list;
|
5007 |
char *prevname = NULL;
|
5008 |
Tcl_ObjCmdProc *proc = (Tcl_ObjCmdProc *) NULL;
|
5009 |
list = (OptionAssocData *) Tcl_GetAssocData(interp, "photoOption",
|
5010 |
(Tcl_InterpDeleteProc **) NULL);
|
5011 |
while (list != (OptionAssocData *) NULL) {
|
5012 |
if (strncmp(name, list->name, length) == 0) {
|
5013 |
if (proc != (Tcl_ObjCmdProc *) NULL) {
|
5014 |
Tcl_ResetResult(interp);
|
5015 |
Tcl_AppendResult(interp, "ambiguous option \"", name,
|
5016 |
"\": must be ", prevname, (char *) NULL);
|
5017 |
while (list->nextPtr != (OptionAssocData *) NULL) {
|
5018 |
Tcl_AppendResult(interp, prevname, ", ",(char *) NULL);
|
5019 |
list = list->nextPtr;
|
5020 |
prevname = list->name;
|
5021 |
}
|
5022 |
Tcl_AppendResult(interp, ", or", prevname, (char *) NULL);
|
5023 |
return (Tcl_ObjCmdProc *) NULL;
|
5024 |
}
|
5025 |
proc = list->command;
|
5026 |
prevname = list->name;
|
5027 |
}
|
5028 |
list = list->nextPtr;
|
5029 |
}
|
5030 |
if (proc != (Tcl_ObjCmdProc *) NULL) {
|
5031 |
Tcl_ResetResult(interp);
|
5032 |
}
|
5033 |
return proc;
|
5034 |
}
|
5035 |
|
5036 |
/*
|
5037 |
*----------------------------------------------------------------------
|
5038 |
*
|
5039 |
* PhotoOptionCleanupProc --
|
5040 |
*
|
5041 |
* This procedure is invoked whenever an interpreter is deleted
|
5042 |
* to cleanup the AssocData for "photoVisitor".
|
5043 |
*
|
5044 |
* Results:
|
5045 |
* None.
|
5046 |
*
|
5047 |
* Side effects:
|
5048 |
* Photo Visitor options are removed.
|
5049 |
*
|
5050 |
*----------------------------------------------------------------------
|
5051 |
*/
|
5052 |
|
5053 |
static void
|
5054 |
PhotoOptionCleanupProc(clientData, interp)
|
5055 |
ClientData clientData; /* Points to "photoVisitor" AssocData
|
5056 |
* for the interpreter. */
|
5057 |
Tcl_Interp *interp; /* Interpreter that is being deleted. */
|
5058 |
{
|
5059 |
OptionAssocData *list = (OptionAssocData *) clientData;
|
5060 |
OptionAssocData *ptr;
|
5061 |
|
5062 |
while (list != NULL) {
|
5063 |
list = (ptr = list)->nextPtr;
|
5064 |
ckfree((char *) ptr);
|
5065 |
}
|
5066 |
}
|
5067 |
|
5068 |
/*
|
5069 |
*--------------------------------------------------------------
|
5070 |
*
|
5071 |
* Tk_CreatePhotoOption --
|
5072 |
*
|
5073 |
* This procedure may be invoked to add a new kind of photo
|
5074 |
* option to the core photo command supported by Tk.
|
5075 |
*
|
5076 |
* Results:
|
5077 |
* None.
|
5078 |
*
|
5079 |
* Side effects:
|
5080 |
* From now on, the new option will be useable by the
|
5081 |
* photo command.
|
5082 |
*
|
5083 |
*--------------------------------------------------------------
|
5084 |
*/
|
5085 |
|
5086 |
void
|
5087 |
Tk_CreatePhotoOption(interp, name, proc)
|
5088 |
Tcl_Interp *interp; /* interpreter */
|
5089 |
CONST char *name; /* option name */
|
5090 |
Tcl_ObjCmdProc *proc; /* proc to execute command */
|
5091 |
{
|
5092 |
OptionAssocData *typePtr2, *prevPtr, *ptr;
|
5093 |
OptionAssocData *list;
|
5094 |
|
5095 |
list = (OptionAssocData *) Tcl_GetAssocData(interp, "photoOption",
|
5096 |
(Tcl_InterpDeleteProc **) NULL);
|
5097 |
|
5098 |
/*
|
5099 |
* If there's already a photo option with the given name, remove it.
|
5100 |
*/
|
5101 |
|
5102 |
for (typePtr2 = list, prevPtr = NULL; typePtr2 != NULL;
|
5103 |
prevPtr = typePtr2, typePtr2 = typePtr2->nextPtr) {
|
5104 |
if (strcmp(typePtr2->name, name) == 0) {
|
5105 |
if (prevPtr == NULL) {
|
5106 |
list = typePtr2->nextPtr;
|
5107 |
} else {
|
5108 |
prevPtr->nextPtr = typePtr2->nextPtr;
|
5109 |
}
|
5110 |
ckfree((char *) typePtr2);
|
5111 |
break;
|
5112 |
}
|
5113 |
}
|
5114 |
ptr = (OptionAssocData *) ckalloc(sizeof(OptionAssocData) + strlen(name));
|
5115 |
strcpy(&(ptr->name[0]), name);
|
5116 |
ptr->command = proc;
|
5117 |
ptr->nextPtr = list;
|
5118 |
Tcl_SetAssocData(interp, "photoOption", PhotoOptionCleanupProc,
|
5119 |
(ClientData) ptr);
|
5120 |
}
|
5121 |
|
5122 |
/*
|
5123 |
*--------------------------------------------------------------
|
5124 |
*
|
5125 |
* TkPostscriptPhoto --
|
5126 |
*
|
5127 |
* This procedure is called to output the contents of a
|
5128 |
* photo image in Postscript by calling the Tk_PostscriptPhoto
|
5129 |
* function.
|
5130 |
*
|
5131 |
* Results:
|
5132 |
* Returns a standard Tcl return value.
|
5133 |
*
|
5134 |
* Side effects:
|
5135 |
* None.
|
5136 |
*
|
5137 |
*--------------------------------------------------------------
|
5138 |
*/
|
5139 |
static int
|
5140 |
ImgPhotoPostscript(clientData, interp, tkwin, psInfo,
|
5141 |
x, y, width, height, prepass)
|
5142 |
ClientData clientData;
|
5143 |
Tcl_Interp *interp;
|
5144 |
Tk_Window tkwin;
|
5145 |
Tk_PostscriptInfo psInfo; /* postscript info */
|
5146 |
int x, y; /* First pixel to output */
|
5147 |
int width, height; /* Width and height of area */
|
5148 |
int prepass;
|
5149 |
{
|
5150 |
Tk_PhotoImageBlock block;
|
5151 |
|
5152 |
Tk_PhotoGetImage((Tk_PhotoHandle) clientData, &block);
|
5153 |
block.pixelPtr += y * block.pitch + x * block.pixelSize;
|
5154 |
|
5155 |
return Tk_PostscriptPhoto(interp, &block, psInfo, width, height);
|
5156 |
}
|
5157 |
|
5158 |
/* End of tkimgphoto.c */
|