1 |
/* $Header$ */
|
2 |
|
3 |
/*
|
4 |
* tkWinColor.c --
|
5 |
*
|
6 |
* Functions to map color names to system color values.
|
7 |
*
|
8 |
* Copyright (c) 1995 Sun Microsystems, Inc.
|
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* Copyright (c) 1994 Software Research Associates, Inc.
|
10 |
*
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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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* RCS: @(#) $Id: tkwincolor.c,v 1.1.1.1 2001/06/13 05:12:03 dtashley Exp $
|
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*/
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|
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#include "tkWinInt.h"
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18 |
#include "tkColor.h"
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19 |
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/*
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* The following structure is used to keep track of each color that is
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* allocated by this module.
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*/
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|
25 |
typedef struct WinColor {
|
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TkColor info; /* Generic color information. */
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27 |
int index; /* Index for GetSysColor(), -1 if color
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* is not a "live" system color. */
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} WinColor;
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/*
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* The sysColors array contains the names and index values for the
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* Windows indirect system color names. In use, all of the names
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* will have the string "System" prepended, but we omit it in the table
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* to save space.
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*/
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typedef struct {
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char *name;
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int index;
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} SystemColorEntry;
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43 |
|
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static SystemColorEntry sysColors[] = {
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"3dDarkShadow", COLOR_3DDKSHADOW,
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"3dLight", COLOR_3DLIGHT,
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"ActiveBorder", COLOR_ACTIVEBORDER,
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"ActiveCaption", COLOR_ACTIVECAPTION,
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"AppWorkspace", COLOR_APPWORKSPACE,
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"Background", COLOR_BACKGROUND,
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"ButtonFace", COLOR_BTNFACE,
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"ButtonHighlight", COLOR_BTNHIGHLIGHT,
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"ButtonShadow", COLOR_BTNSHADOW,
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"ButtonText", COLOR_BTNTEXT,
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"CaptionText", COLOR_CAPTIONTEXT,
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"DisabledText", COLOR_GRAYTEXT,
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"GrayText", COLOR_GRAYTEXT,
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"Highlight", COLOR_HIGHLIGHT,
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"HighlightText", COLOR_HIGHLIGHTTEXT,
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"InactiveBorder", COLOR_INACTIVEBORDER,
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"InactiveCaption", COLOR_INACTIVECAPTION,
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"InactiveCaptionText", COLOR_INACTIVECAPTIONTEXT,
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"InfoBackground", COLOR_INFOBK,
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"InfoText", COLOR_INFOTEXT,
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"Menu", COLOR_MENU,
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"MenuText", COLOR_MENUTEXT,
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"Scrollbar", COLOR_SCROLLBAR,
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"Window", COLOR_WINDOW,
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"WindowFrame", COLOR_WINDOWFRAME,
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"WindowText", COLOR_WINDOWTEXT,
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NULL, 0
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};
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typedef struct ThreadSpecificData {
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int ncolors;
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} ThreadSpecificData;
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static Tcl_ThreadDataKey dataKey;
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/*
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* Forward declarations for functions defined later in this file.
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*/
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static int FindSystemColor _ANSI_ARGS_((const char *name,
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XColor *colorPtr, int *indexPtr));
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static int GetColorByName _ANSI_ARGS_((char *name, XColor *color));
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static int GetColorByValue _ANSI_ARGS_((char *value, XColor *color));
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/*
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*----------------------------------------------------------------------
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*
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* FindSystemColor --
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*
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* This routine finds the color entry that corresponds to the
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* specified color.
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*
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* Results:
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* Returns non-zero on success. The RGB values of the XColor
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* will be initialized to the proper values on success.
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*
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* Side effects:
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* None.
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*
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*----------------------------------------------------------------------
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*/
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static int
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FindSystemColor(name, colorPtr, indexPtr)
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const char *name; /* Color name. */
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XColor *colorPtr; /* Where to store results. */
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int *indexPtr; /* Out parameter to store color index. */
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{
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int l, u, r, i;
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ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
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Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
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/*
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* Count the number of elements in the color array if we haven't
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* done so yet.
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*/
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if (tsdPtr->ncolors == 0) {
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SystemColorEntry *ePtr;
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int version;
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version = LOBYTE(LOWORD(GetVersion()));
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for (ePtr = sysColors; ePtr->name != NULL; ePtr++) {
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if (version < 4) {
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if (ePtr->index == COLOR_3DDKSHADOW) {
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ePtr->index = COLOR_BTNSHADOW;
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} else if (ePtr->index == COLOR_3DLIGHT) {
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ePtr->index = COLOR_BTNHIGHLIGHT;
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}
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}
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tsdPtr->ncolors++;
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}
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}
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/*
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* Perform a binary search on the sorted array of colors.
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*/
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l = 0;
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u = tsdPtr->ncolors - 1;
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while (l <= u) {
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i = (l + u) / 2;
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r = strcasecmp(name, sysColors[i].name);
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if (r == 0) {
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break;
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} else if (r < 0) {
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u = i-1;
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} else {
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l = i+1;
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}
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}
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if (l > u) {
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return 0;
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}
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*indexPtr = sysColors[i].index;
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colorPtr->pixel = GetSysColor(sysColors[i].index);
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/*
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* x257 is (value<<8 + value) to get the properly bit shifted
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* and padded value. [Bug: 4919]
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*/
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colorPtr->red = GetRValue(colorPtr->pixel) * 257;
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colorPtr->green = GetGValue(colorPtr->pixel) * 257;
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colorPtr->blue = GetBValue(colorPtr->pixel) * 257;
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colorPtr->flags = DoRed|DoGreen|DoBlue;
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colorPtr->pad = 0;
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return 1;
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}
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/*
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*----------------------------------------------------------------------
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*
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* TkpGetColor --
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*
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* Allocate a new TkColor for the color with the given name.
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*
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* Results:
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* Returns a newly allocated TkColor, or NULL on failure.
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*
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* Side effects:
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* May invalidate the colormap cache associated with tkwin upon
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* allocating a new colormap entry. Allocates a new TkColor
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* structure.
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*
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*----------------------------------------------------------------------
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*/
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TkColor *
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TkpGetColor(tkwin, name)
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Tk_Window tkwin; /* Window in which color will be used. */
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Tk_Uid name; /* Name of color to allocated (in form
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* suitable for passing to XParseColor). */
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{
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WinColor *winColPtr;
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XColor color;
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int index = -1; /* -1 indicates that this is not an indirect
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* sytem color. */
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/*
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* Check to see if it is a system color or an X color string. If the
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* color is found, allocate a new WinColor and store the XColor and the
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* system color index.
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*/
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if (((strncasecmp(name, "system", 6) == 0)
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209 |
&& FindSystemColor(name+6, &color, &index))
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|| XParseColor(Tk_Display(tkwin), Tk_Colormap(tkwin), name,
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&color)) {
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winColPtr = (WinColor *) ckalloc(sizeof(WinColor));
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winColPtr->info.color = color;
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winColPtr->index = index;
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XAllocColor(Tk_Display(tkwin), Tk_Colormap(tkwin),
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&winColPtr->info.color);
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return (TkColor *) winColPtr;
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}
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return (TkColor *) NULL;
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}
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/*
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*----------------------------------------------------------------------
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*
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* TkpGetColorByValue --
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*
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* Given a desired set of red-green-blue intensities for a color,
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* locate a pixel value to use to draw that color in a given
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* window.
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*
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* Results:
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* The return value is a pointer to an TkColor structure that
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* indicates the closest red, blue, and green intensities available
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* to those specified in colorPtr, and also specifies a pixel
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* value to use to draw in that color.
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*
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* Side effects:
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* May invalidate the colormap cache for the specified window.
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* Allocates a new TkColor structure.
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*
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*----------------------------------------------------------------------
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*/
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TkColor *
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TkpGetColorByValue(tkwin, colorPtr)
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Tk_Window tkwin; /* Window in which color will be used. */
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XColor *colorPtr; /* Red, green, and blue fields indicate
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* desired color. */
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250 |
{
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WinColor *tkColPtr = (WinColor *) ckalloc(sizeof(WinColor));
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252 |
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253 |
tkColPtr->info.color.red = colorPtr->red;
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tkColPtr->info.color.green = colorPtr->green;
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tkColPtr->info.color.blue = colorPtr->blue;
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tkColPtr->info.color.pixel = 0;
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tkColPtr->index = -1;
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XAllocColor(Tk_Display(tkwin), Tk_Colormap(tkwin), &tkColPtr->info.color);
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return (TkColor *) tkColPtr;
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}
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261 |
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262 |
/*
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263 |
*----------------------------------------------------------------------
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264 |
*
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265 |
* TkpFreeColor --
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266 |
*
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267 |
* Release the specified color back to the system.
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268 |
*
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269 |
* Results:
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270 |
* None
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271 |
*
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272 |
* Side effects:
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273 |
* Invalidates the colormap cache for the colormap associated with
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274 |
* the given color.
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275 |
*
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276 |
*----------------------------------------------------------------------
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277 |
*/
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278 |
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279 |
void
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280 |
TkpFreeColor(tkColPtr)
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281 |
TkColor *tkColPtr; /* Color to be released. Must have been
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282 |
* allocated by TkpGetColor or
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283 |
* TkpGetColorByValue. */
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284 |
{
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285 |
Screen *screen = tkColPtr->screen;
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286 |
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287 |
XFreeColors(DisplayOfScreen(screen), tkColPtr->colormap,
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288 |
&tkColPtr->color.pixel, 1, 0L);
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289 |
}
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290 |
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291 |
/*
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292 |
*----------------------------------------------------------------------
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293 |
*
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294 |
* TkWinIndexOfColor --
|
295 |
*
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296 |
* Given a color, return the system color index that was used
|
297 |
* to create the color.
|
298 |
*
|
299 |
* Results:
|
300 |
* If the color was allocated using a system indirect color name,
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301 |
* then the corresponding GetSysColor() index is returned.
|
302 |
* Otherwise, -1 is returned.
|
303 |
*
|
304 |
* Side effects:
|
305 |
* None.
|
306 |
*
|
307 |
*----------------------------------------------------------------------
|
308 |
*/
|
309 |
|
310 |
int
|
311 |
TkWinIndexOfColor(colorPtr)
|
312 |
XColor *colorPtr;
|
313 |
{
|
314 |
register WinColor *winColPtr = (WinColor *) colorPtr;
|
315 |
if (winColPtr->info.magic == COLOR_MAGIC) {
|
316 |
return winColPtr->index;
|
317 |
}
|
318 |
return -1;
|
319 |
}
|
320 |
|
321 |
/*
|
322 |
*----------------------------------------------------------------------
|
323 |
*
|
324 |
* XAllocColor --
|
325 |
*
|
326 |
* Find the closest available color to the specified XColor.
|
327 |
*
|
328 |
* Results:
|
329 |
* Updates the color argument and returns 1 on success. Otherwise
|
330 |
* returns 0.
|
331 |
*
|
332 |
* Side effects:
|
333 |
* Allocates a new color in the palette.
|
334 |
*
|
335 |
*----------------------------------------------------------------------
|
336 |
*/
|
337 |
|
338 |
int
|
339 |
XAllocColor(display, colormap, color)
|
340 |
Display* display;
|
341 |
Colormap colormap;
|
342 |
XColor* color;
|
343 |
{
|
344 |
TkWinColormap *cmap = (TkWinColormap *) colormap;
|
345 |
PALETTEENTRY entry, closeEntry;
|
346 |
HDC dc = GetDC(NULL);
|
347 |
|
348 |
entry.peRed = (color->red) >> 8;
|
349 |
entry.peGreen = (color->green) >> 8;
|
350 |
entry.peBlue = (color->blue) >> 8;
|
351 |
entry.peFlags = 0;
|
352 |
|
353 |
if (GetDeviceCaps(dc, RASTERCAPS) & RC_PALETTE) {
|
354 |
unsigned long sizePalette = GetDeviceCaps(dc, SIZEPALETTE);
|
355 |
UINT newPixel, closePixel;
|
356 |
int new, refCount;
|
357 |
Tcl_HashEntry *entryPtr;
|
358 |
UINT index;
|
359 |
|
360 |
/*
|
361 |
* Find the nearest existing palette entry.
|
362 |
*/
|
363 |
|
364 |
newPixel = RGB(entry.peRed, entry.peGreen, entry.peBlue);
|
365 |
index = GetNearestPaletteIndex(cmap->palette, newPixel);
|
366 |
GetPaletteEntries(cmap->palette, index, 1, &closeEntry);
|
367 |
closePixel = RGB(closeEntry.peRed, closeEntry.peGreen,
|
368 |
closeEntry.peBlue);
|
369 |
|
370 |
/*
|
371 |
* If this is not a duplicate, allocate a new entry. Note that
|
372 |
* we may get values for index that are above the current size
|
373 |
* of the palette. This happens because we don't shrink the size of
|
374 |
* the palette object when we deallocate colors so there may be
|
375 |
* stale values that match in the upper slots. We should ignore
|
376 |
* those values and just put the new color in as if the colors
|
377 |
* had not matched.
|
378 |
*/
|
379 |
|
380 |
if ((index >= cmap->size) || (newPixel != closePixel)) {
|
381 |
if (cmap->size == sizePalette) {
|
382 |
color->red = closeEntry.peRed * 257;
|
383 |
color->green = closeEntry.peGreen * 257;
|
384 |
color->blue = closeEntry.peBlue * 257;
|
385 |
entry = closeEntry;
|
386 |
if (index >= cmap->size) {
|
387 |
OutputDebugString("XAllocColor: Colormap is bigger than we thought");
|
388 |
}
|
389 |
} else {
|
390 |
cmap->size++;
|
391 |
ResizePalette(cmap->palette, cmap->size);
|
392 |
SetPaletteEntries(cmap->palette, cmap->size - 1, 1, &entry);
|
393 |
}
|
394 |
}
|
395 |
|
396 |
color->pixel = PALETTERGB(entry.peRed, entry.peGreen, entry.peBlue);
|
397 |
entryPtr = Tcl_CreateHashEntry(&cmap->refCounts,
|
398 |
(char *) color->pixel, &new);
|
399 |
if (new) {
|
400 |
refCount = 1;
|
401 |
} else {
|
402 |
refCount = ((int) Tcl_GetHashValue(entryPtr)) + 1;
|
403 |
}
|
404 |
Tcl_SetHashValue(entryPtr, (ClientData)refCount);
|
405 |
} else {
|
406 |
|
407 |
/*
|
408 |
* Determine what color will actually be used on non-colormap systems.
|
409 |
*/
|
410 |
|
411 |
color->pixel = GetNearestColor(dc,
|
412 |
RGB(entry.peRed, entry.peGreen, entry.peBlue));
|
413 |
color->red = GetRValue(color->pixel) * 257;
|
414 |
color->green = GetGValue(color->pixel) * 257;
|
415 |
color->blue = GetBValue(color->pixel) * 257;
|
416 |
}
|
417 |
|
418 |
ReleaseDC(NULL, dc);
|
419 |
return 1;
|
420 |
}
|
421 |
|
422 |
/*
|
423 |
*----------------------------------------------------------------------
|
424 |
*
|
425 |
* XFreeColors --
|
426 |
*
|
427 |
* Deallocate a block of colors.
|
428 |
*
|
429 |
* Results:
|
430 |
* None.
|
431 |
*
|
432 |
* Side effects:
|
433 |
* Removes entries for the current palette and compacts the
|
434 |
* remaining set.
|
435 |
*
|
436 |
*----------------------------------------------------------------------
|
437 |
*/
|
438 |
|
439 |
void
|
440 |
XFreeColors(display, colormap, pixels, npixels, planes)
|
441 |
Display* display;
|
442 |
Colormap colormap;
|
443 |
unsigned long* pixels;
|
444 |
int npixels;
|
445 |
unsigned long planes;
|
446 |
{
|
447 |
TkWinColormap *cmap = (TkWinColormap *) colormap;
|
448 |
COLORREF cref;
|
449 |
UINT count, index, refCount;
|
450 |
int i;
|
451 |
PALETTEENTRY entry, *entries;
|
452 |
Tcl_HashEntry *entryPtr;
|
453 |
HDC dc = GetDC(NULL);
|
454 |
|
455 |
/*
|
456 |
* We don't have to do anything for non-palette devices.
|
457 |
*/
|
458 |
|
459 |
if (GetDeviceCaps(dc, RASTERCAPS) & RC_PALETTE) {
|
460 |
|
461 |
/*
|
462 |
* This is really slow for large values of npixels.
|
463 |
*/
|
464 |
|
465 |
for (i = 0; i < npixels; i++) {
|
466 |
entryPtr = Tcl_FindHashEntry(&cmap->refCounts,
|
467 |
(char *) pixels[i]);
|
468 |
if (!entryPtr) {
|
469 |
panic("Tried to free a color that isn't allocated.");
|
470 |
}
|
471 |
refCount = (int) Tcl_GetHashValue(entryPtr) - 1;
|
472 |
if (refCount == 0) {
|
473 |
cref = pixels[i] & 0x00ffffff;
|
474 |
index = GetNearestPaletteIndex(cmap->palette, cref);
|
475 |
GetPaletteEntries(cmap->palette, index, 1, &entry);
|
476 |
if (cref == RGB(entry.peRed, entry.peGreen, entry.peBlue)) {
|
477 |
count = cmap->size - index;
|
478 |
entries = (PALETTEENTRY *) ckalloc(sizeof(PALETTEENTRY)
|
479 |
* count);
|
480 |
GetPaletteEntries(cmap->palette, index+1, count, entries);
|
481 |
SetPaletteEntries(cmap->palette, index, count, entries);
|
482 |
ckfree((char *) entries);
|
483 |
cmap->size--;
|
484 |
} else {
|
485 |
panic("Tried to free a color that isn't allocated.");
|
486 |
}
|
487 |
Tcl_DeleteHashEntry(entryPtr);
|
488 |
} else {
|
489 |
Tcl_SetHashValue(entryPtr, (ClientData)refCount);
|
490 |
}
|
491 |
}
|
492 |
}
|
493 |
ReleaseDC(NULL, dc);
|
494 |
}
|
495 |
|
496 |
/*
|
497 |
*----------------------------------------------------------------------
|
498 |
*
|
499 |
* XCreateColormap --
|
500 |
*
|
501 |
* Allocate a new colormap.
|
502 |
*
|
503 |
* Results:
|
504 |
* Returns a newly allocated colormap.
|
505 |
*
|
506 |
* Side effects:
|
507 |
* Allocates an empty palette and color list.
|
508 |
*
|
509 |
*----------------------------------------------------------------------
|
510 |
*/
|
511 |
|
512 |
Colormap
|
513 |
XCreateColormap(display, w, visual, alloc)
|
514 |
Display* display;
|
515 |
Window w;
|
516 |
Visual* visual;
|
517 |
int alloc;
|
518 |
{
|
519 |
char logPalBuf[sizeof(LOGPALETTE) + 256 * sizeof(PALETTEENTRY)];
|
520 |
LOGPALETTE *logPalettePtr;
|
521 |
PALETTEENTRY *entryPtr;
|
522 |
TkWinColormap *cmap;
|
523 |
Tcl_HashEntry *hashPtr;
|
524 |
int new;
|
525 |
UINT i;
|
526 |
HPALETTE sysPal;
|
527 |
|
528 |
/*
|
529 |
* Allocate a starting palette with all of the reserved colors.
|
530 |
*/
|
531 |
|
532 |
logPalettePtr = (LOGPALETTE *) logPalBuf;
|
533 |
logPalettePtr->palVersion = 0x300;
|
534 |
sysPal = (HPALETTE) GetStockObject(DEFAULT_PALETTE);
|
535 |
logPalettePtr->palNumEntries = GetPaletteEntries(sysPal, 0, 256,
|
536 |
logPalettePtr->palPalEntry);
|
537 |
|
538 |
cmap = (TkWinColormap *) ckalloc(sizeof(TkWinColormap));
|
539 |
cmap->size = logPalettePtr->palNumEntries;
|
540 |
cmap->stale = 0;
|
541 |
cmap->palette = CreatePalette(logPalettePtr);
|
542 |
|
543 |
/*
|
544 |
* Add hash entries for each of the static colors.
|
545 |
*/
|
546 |
|
547 |
Tcl_InitHashTable(&cmap->refCounts, TCL_ONE_WORD_KEYS);
|
548 |
for (i = 0; i < logPalettePtr->palNumEntries; i++) {
|
549 |
entryPtr = logPalettePtr->palPalEntry + i;
|
550 |
hashPtr = Tcl_CreateHashEntry(&cmap->refCounts, (char*) PALETTERGB(
|
551 |
entryPtr->peRed, entryPtr->peGreen, entryPtr->peBlue), &new);
|
552 |
Tcl_SetHashValue(hashPtr, (ClientData)1);
|
553 |
}
|
554 |
|
555 |
return (Colormap)cmap;
|
556 |
}
|
557 |
|
558 |
/*
|
559 |
*----------------------------------------------------------------------
|
560 |
*
|
561 |
* XFreeColormap --
|
562 |
*
|
563 |
* Frees the resources associated with the given colormap.
|
564 |
*
|
565 |
* Results:
|
566 |
* None.
|
567 |
*
|
568 |
* Side effects:
|
569 |
* Deletes the palette associated with the colormap. Note that
|
570 |
* the palette must not be selected into a device context when
|
571 |
* this occurs.
|
572 |
*
|
573 |
*----------------------------------------------------------------------
|
574 |
*/
|
575 |
|
576 |
void
|
577 |
XFreeColormap(display, colormap)
|
578 |
Display* display;
|
579 |
Colormap colormap;
|
580 |
{
|
581 |
TkWinColormap *cmap = (TkWinColormap *) colormap;
|
582 |
if (!DeleteObject(cmap->palette)) {
|
583 |
panic("Unable to free colormap, palette is still selected.");
|
584 |
}
|
585 |
Tcl_DeleteHashTable(&cmap->refCounts);
|
586 |
ckfree((char *) cmap);
|
587 |
}
|
588 |
|
589 |
/*
|
590 |
*----------------------------------------------------------------------
|
591 |
*
|
592 |
* TkWinSelectPalette --
|
593 |
*
|
594 |
* This function sets up the specified device context with a
|
595 |
* given palette. If the palette is stale, it realizes it in
|
596 |
* the background unless the palette is the current global
|
597 |
* palette.
|
598 |
*
|
599 |
* Results:
|
600 |
* Returns the previous palette selected into the device context.
|
601 |
*
|
602 |
* Side effects:
|
603 |
* May change the system palette.
|
604 |
*
|
605 |
*----------------------------------------------------------------------
|
606 |
*/
|
607 |
|
608 |
HPALETTE
|
609 |
TkWinSelectPalette(dc, colormap)
|
610 |
HDC dc;
|
611 |
Colormap colormap;
|
612 |
{
|
613 |
TkWinColormap *cmap = (TkWinColormap *) colormap;
|
614 |
HPALETTE oldPalette;
|
615 |
|
616 |
oldPalette = SelectPalette(dc, cmap->palette,
|
617 |
(cmap->palette == TkWinGetSystemPalette()) ? FALSE : TRUE);
|
618 |
RealizePalette(dc);
|
619 |
return oldPalette;
|
620 |
}
|
621 |
|
622 |
/* End of tkwincolor.c */
|