1 |
/* $Header$ */
|
2 |
|
3 |
/*
|
4 |
* tkImgBmap.c --
|
5 |
*
|
6 |
* This procedure implements images of type "bitmap" for Tk.
|
7 |
*
|
8 |
* Copyright (c) 1994 The Regents of the University of California.
|
9 |
* Copyright (c) 1994-1997 Sun Microsystems, Inc.
|
10 |
* Copyright (c) 1999 by Scriptics Corporation.
|
11 |
*
|
12 |
* See the file "license.terms" for information on usage and redistribution
|
13 |
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
14 |
*
|
15 |
* RCS: @(#) $Id: tkimgbmap.c,v 1.1.1.1 2001/06/13 05:02:24 dtashley Exp $
|
16 |
*/
|
17 |
|
18 |
#include "tkInt.h"
|
19 |
#include "tkPort.h"
|
20 |
|
21 |
/*
|
22 |
* The following data structure represents the master for a bitmap
|
23 |
* image:
|
24 |
*/
|
25 |
|
26 |
typedef struct BitmapMaster {
|
27 |
Tk_ImageMaster tkMaster; /* Tk's token for image master. NULL means
|
28 |
* the image is being deleted. */
|
29 |
Tcl_Interp *interp; /* Interpreter for application that is
|
30 |
* using image. */
|
31 |
Tcl_Command imageCmd; /* Token for image command (used to delete
|
32 |
* it when the image goes away). NULL means
|
33 |
* the image command has already been
|
34 |
* deleted. */
|
35 |
int width, height; /* Dimensions of image. */
|
36 |
char *data; /* Data comprising bitmap (suitable for
|
37 |
* input to XCreateBitmapFromData). May
|
38 |
* be NULL if no data. Malloc'ed. */
|
39 |
char *maskData; /* Data for bitmap's mask (suitable for
|
40 |
* input to XCreateBitmapFromData).
|
41 |
* Malloc'ed. */
|
42 |
Tk_Uid fgUid; /* Value of -foreground option (malloc'ed). */
|
43 |
Tk_Uid bgUid; /* Value of -background option (malloc'ed). */
|
44 |
char *fileString; /* Value of -file option (malloc'ed). */
|
45 |
char *dataString; /* Value of -data option (malloc'ed). */
|
46 |
char *maskFileString; /* Value of -maskfile option (malloc'ed). */
|
47 |
char *maskDataString; /* Value of -maskdata option (malloc'ed). */
|
48 |
struct BitmapInstance *instancePtr;
|
49 |
/* First in list of all instances associated
|
50 |
* with this master. */
|
51 |
} BitmapMaster;
|
52 |
|
53 |
/*
|
54 |
* The following data structure represents all of the instances of an
|
55 |
* image that lie within a particular window:
|
56 |
*/
|
57 |
|
58 |
typedef struct BitmapInstance {
|
59 |
int refCount; /* Number of instances that share this
|
60 |
* data structure. */
|
61 |
BitmapMaster *masterPtr; /* Pointer to master for image. */
|
62 |
Tk_Window tkwin; /* Window in which the instances will be
|
63 |
* displayed. */
|
64 |
XColor *fg; /* Foreground color for displaying image. */
|
65 |
XColor *bg; /* Background color for displaying image. */
|
66 |
Pixmap bitmap; /* The bitmap to display. */
|
67 |
Pixmap mask; /* Mask: only display bitmap pixels where
|
68 |
* there are 1's here. */
|
69 |
GC gc; /* Graphics context for displaying bitmap.
|
70 |
* None means there was an error while
|
71 |
* setting up the instance, so it cannot
|
72 |
* be displayed. */
|
73 |
struct BitmapInstance *nextPtr;
|
74 |
/* Next in list of all instance structures
|
75 |
* associated with masterPtr (NULL means
|
76 |
* end of list). */
|
77 |
} BitmapInstance;
|
78 |
|
79 |
/*
|
80 |
* The type record for bitmap images:
|
81 |
*/
|
82 |
|
83 |
static int GetByte _ANSI_ARGS_((Tcl_Channel chan));
|
84 |
static int ImgBmapCreate _ANSI_ARGS_((Tcl_Interp *interp,
|
85 |
char *name, int argc, Tcl_Obj *CONST objv[],
|
86 |
Tk_ImageType *typePtr, Tk_ImageMaster master,
|
87 |
ClientData *clientDataPtr));
|
88 |
static ClientData ImgBmapGet _ANSI_ARGS_((Tk_Window tkwin,
|
89 |
ClientData clientData));
|
90 |
static void ImgBmapDisplay _ANSI_ARGS_((ClientData clientData,
|
91 |
Display *display, Drawable drawable,
|
92 |
int imageX, int imageY, int width, int height,
|
93 |
int drawableX, int drawableY));
|
94 |
static void ImgBmapFree _ANSI_ARGS_((ClientData clientData,
|
95 |
Display *display));
|
96 |
static void ImgBmapDelete _ANSI_ARGS_((ClientData clientData));
|
97 |
static int ImgBmapPostscript _ANSI_ARGS_((ClientData clientData,
|
98 |
Tcl_Interp *interp, Tk_Window tkwin,
|
99 |
Tk_PostscriptInfo psinfo, int x, int y,
|
100 |
int width, int height, int prepass));
|
101 |
|
102 |
Tk_ImageType tkBitmapImageType = {
|
103 |
"bitmap", /* name */
|
104 |
ImgBmapCreate, /* createProc */
|
105 |
ImgBmapGet, /* getProc */
|
106 |
ImgBmapDisplay, /* displayProc */
|
107 |
ImgBmapFree, /* freeProc */
|
108 |
ImgBmapDelete, /* deleteProc */
|
109 |
ImgBmapPostscript, /* postscriptProc */
|
110 |
(Tk_ImageType *) NULL /* nextPtr */
|
111 |
};
|
112 |
|
113 |
/*
|
114 |
* Information used for parsing configuration specs:
|
115 |
*/
|
116 |
|
117 |
static Tk_ConfigSpec configSpecs[] = {
|
118 |
{TK_CONFIG_UID, "-background", (char *) NULL, (char *) NULL,
|
119 |
"", Tk_Offset(BitmapMaster, bgUid), 0},
|
120 |
{TK_CONFIG_STRING, "-data", (char *) NULL, (char *) NULL,
|
121 |
(char *) NULL, Tk_Offset(BitmapMaster, dataString), TK_CONFIG_NULL_OK},
|
122 |
{TK_CONFIG_STRING, "-file", (char *) NULL, (char *) NULL,
|
123 |
(char *) NULL, Tk_Offset(BitmapMaster, fileString), TK_CONFIG_NULL_OK},
|
124 |
{TK_CONFIG_UID, "-foreground", (char *) NULL, (char *) NULL,
|
125 |
"#000000", Tk_Offset(BitmapMaster, fgUid), 0},
|
126 |
{TK_CONFIG_STRING, "-maskdata", (char *) NULL, (char *) NULL,
|
127 |
(char *) NULL, Tk_Offset(BitmapMaster, maskDataString),
|
128 |
TK_CONFIG_NULL_OK},
|
129 |
{TK_CONFIG_STRING, "-maskfile", (char *) NULL, (char *) NULL,
|
130 |
(char *) NULL, Tk_Offset(BitmapMaster, maskFileString),
|
131 |
TK_CONFIG_NULL_OK},
|
132 |
{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
|
133 |
(char *) NULL, 0, 0}
|
134 |
};
|
135 |
|
136 |
/*
|
137 |
* The following data structure is used to describe the state of
|
138 |
* parsing a bitmap file or string. It is used for communication
|
139 |
* between TkGetBitmapData and NextBitmapWord.
|
140 |
*/
|
141 |
|
142 |
#define MAX_WORD_LENGTH 100
|
143 |
typedef struct ParseInfo {
|
144 |
char *string; /* Next character of string data for bitmap,
|
145 |
* or NULL if bitmap is being read from
|
146 |
* file. */
|
147 |
Tcl_Channel chan; /* File containing bitmap data, or NULL
|
148 |
* if no file. */
|
149 |
char word[MAX_WORD_LENGTH+1];
|
150 |
/* Current word of bitmap data, NULL
|
151 |
* terminated. */
|
152 |
int wordLength; /* Number of non-NULL bytes in word. */
|
153 |
} ParseInfo;
|
154 |
|
155 |
/*
|
156 |
* Prototypes for procedures used only locally in this file:
|
157 |
*/
|
158 |
|
159 |
static int ImgBmapCmd _ANSI_ARGS_((ClientData clientData,
|
160 |
Tcl_Interp *interp, int argc, Tcl_Obj *CONST objv[]));
|
161 |
static void ImgBmapCmdDeletedProc _ANSI_ARGS_((
|
162 |
ClientData clientData));
|
163 |
static void ImgBmapConfigureInstance _ANSI_ARGS_((
|
164 |
BitmapInstance *instancePtr));
|
165 |
static int ImgBmapConfigureMaster _ANSI_ARGS_((
|
166 |
BitmapMaster *masterPtr, int argc, Tcl_Obj *CONST objv[],
|
167 |
int flags));
|
168 |
static int NextBitmapWord _ANSI_ARGS_((ParseInfo *parseInfoPtr));
|
169 |
|
170 |
/*
|
171 |
*----------------------------------------------------------------------
|
172 |
*
|
173 |
* ImgBmapCreate --
|
174 |
*
|
175 |
* This procedure is called by the Tk image code to create "test"
|
176 |
* images.
|
177 |
*
|
178 |
* Results:
|
179 |
* A standard Tcl result.
|
180 |
*
|
181 |
* Side effects:
|
182 |
* The data structure for a new image is allocated.
|
183 |
*
|
184 |
*----------------------------------------------------------------------
|
185 |
*/
|
186 |
|
187 |
/* ARGSUSED */
|
188 |
static int
|
189 |
ImgBmapCreate(interp, name, argc, argv, typePtr, master, clientDataPtr)
|
190 |
Tcl_Interp *interp; /* Interpreter for application containing
|
191 |
* image. */
|
192 |
char *name; /* Name to use for image. */
|
193 |
int argc; /* Number of arguments. */
|
194 |
Tcl_Obj *CONST argv[]; /* Argument objects for options (doesn't
|
195 |
* include image name or type). */
|
196 |
Tk_ImageType *typePtr; /* Pointer to our type record (not used). */
|
197 |
Tk_ImageMaster master; /* Token for image, to be used by us in
|
198 |
* later callbacks. */
|
199 |
ClientData *clientDataPtr; /* Store manager's token for image here;
|
200 |
* it will be returned in later callbacks. */
|
201 |
{
|
202 |
BitmapMaster *masterPtr;
|
203 |
|
204 |
masterPtr = (BitmapMaster *) ckalloc(sizeof(BitmapMaster));
|
205 |
masterPtr->tkMaster = master;
|
206 |
masterPtr->interp = interp;
|
207 |
masterPtr->imageCmd = Tcl_CreateObjCommand(interp, name, ImgBmapCmd,
|
208 |
(ClientData) masterPtr, ImgBmapCmdDeletedProc);
|
209 |
masterPtr->width = masterPtr->height = 0;
|
210 |
masterPtr->data = NULL;
|
211 |
masterPtr->maskData = NULL;
|
212 |
masterPtr->fgUid = NULL;
|
213 |
masterPtr->bgUid = NULL;
|
214 |
masterPtr->fileString = NULL;
|
215 |
masterPtr->dataString = NULL;
|
216 |
masterPtr->maskFileString = NULL;
|
217 |
masterPtr->maskDataString = NULL;
|
218 |
masterPtr->instancePtr = NULL;
|
219 |
if (ImgBmapConfigureMaster(masterPtr, argc, argv, 0) != TCL_OK) {
|
220 |
ImgBmapDelete((ClientData) masterPtr);
|
221 |
return TCL_ERROR;
|
222 |
}
|
223 |
*clientDataPtr = (ClientData) masterPtr;
|
224 |
return TCL_OK;
|
225 |
}
|
226 |
|
227 |
/*
|
228 |
*----------------------------------------------------------------------
|
229 |
*
|
230 |
* ImgBmapConfigureMaster --
|
231 |
*
|
232 |
* This procedure is called when a bitmap image is created or
|
233 |
* reconfigured. It process configuration options and resets
|
234 |
* any instances of the image.
|
235 |
*
|
236 |
* Results:
|
237 |
* A standard Tcl return value. If TCL_ERROR is returned then
|
238 |
* an error message is left in the masterPtr->interp's result.
|
239 |
*
|
240 |
* Side effects:
|
241 |
* Existing instances of the image will be redisplayed to match
|
242 |
* the new configuration options.
|
243 |
*
|
244 |
*----------------------------------------------------------------------
|
245 |
*/
|
246 |
|
247 |
static int
|
248 |
ImgBmapConfigureMaster(masterPtr, objc, objv, flags)
|
249 |
BitmapMaster *masterPtr; /* Pointer to data structure describing
|
250 |
* overall bitmap image to (reconfigure). */
|
251 |
int objc; /* Number of entries in objv. */
|
252 |
Tcl_Obj *CONST objv[]; /* Pairs of configuration options for image. */
|
253 |
int flags; /* Flags to pass to Tk_ConfigureWidget,
|
254 |
* such as TK_CONFIG_ARGV_ONLY. */
|
255 |
{
|
256 |
BitmapInstance *instancePtr;
|
257 |
int maskWidth, maskHeight, dummy1, dummy2;
|
258 |
|
259 |
char **argv = (char **) ckalloc((objc+1) * sizeof(char *));
|
260 |
for (dummy1 = 0; dummy1 < objc; dummy1++) {
|
261 |
argv[dummy1]=Tcl_GetString(objv[dummy1]);
|
262 |
}
|
263 |
argv[objc] = NULL;
|
264 |
|
265 |
if (Tk_ConfigureWidget(masterPtr->interp, Tk_MainWindow(masterPtr->interp),
|
266 |
configSpecs, objc, argv, (char *) masterPtr, flags)
|
267 |
!= TCL_OK) {
|
268 |
ckfree((char *) argv);
|
269 |
return TCL_ERROR;
|
270 |
}
|
271 |
ckfree((char *) argv);
|
272 |
|
273 |
/*
|
274 |
* Parse the bitmap and/or mask to create binary data. Make sure that
|
275 |
* the bitmap and mask have the same dimensions.
|
276 |
*/
|
277 |
|
278 |
if (masterPtr->data != NULL) {
|
279 |
ckfree(masterPtr->data);
|
280 |
masterPtr->data = NULL;
|
281 |
}
|
282 |
if ((masterPtr->fileString != NULL) || (masterPtr->dataString != NULL)) {
|
283 |
masterPtr->data = TkGetBitmapData(masterPtr->interp,
|
284 |
masterPtr->dataString, masterPtr->fileString,
|
285 |
&masterPtr->width, &masterPtr->height, &dummy1, &dummy2);
|
286 |
if (masterPtr->data == NULL) {
|
287 |
return TCL_ERROR;
|
288 |
}
|
289 |
}
|
290 |
if (masterPtr->maskData != NULL) {
|
291 |
ckfree(masterPtr->maskData);
|
292 |
masterPtr->maskData = NULL;
|
293 |
}
|
294 |
if ((masterPtr->maskFileString != NULL)
|
295 |
|| (masterPtr->maskDataString != NULL)) {
|
296 |
if (masterPtr->data == NULL) {
|
297 |
Tcl_SetResult(masterPtr->interp, "can't have mask without bitmap",
|
298 |
TCL_STATIC);
|
299 |
return TCL_ERROR;
|
300 |
}
|
301 |
masterPtr->maskData = TkGetBitmapData(masterPtr->interp,
|
302 |
masterPtr->maskDataString, masterPtr->maskFileString,
|
303 |
&maskWidth, &maskHeight, &dummy1, &dummy2);
|
304 |
if (masterPtr->maskData == NULL) {
|
305 |
return TCL_ERROR;
|
306 |
}
|
307 |
if ((maskWidth != masterPtr->width)
|
308 |
|| (maskHeight != masterPtr->height)) {
|
309 |
ckfree(masterPtr->maskData);
|
310 |
masterPtr->maskData = NULL;
|
311 |
Tcl_SetResult(masterPtr->interp,
|
312 |
"bitmap and mask have different sizes", TCL_STATIC);
|
313 |
return TCL_ERROR;
|
314 |
}
|
315 |
}
|
316 |
|
317 |
/*
|
318 |
* Cycle through all of the instances of this image, regenerating
|
319 |
* the information for each instance. Then force the image to be
|
320 |
* redisplayed everywhere that it is used.
|
321 |
*/
|
322 |
|
323 |
for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
|
324 |
instancePtr = instancePtr->nextPtr) {
|
325 |
ImgBmapConfigureInstance(instancePtr);
|
326 |
}
|
327 |
Tk_ImageChanged(masterPtr->tkMaster, 0, 0, masterPtr->width,
|
328 |
masterPtr->height, masterPtr->width, masterPtr->height);
|
329 |
return TCL_OK;
|
330 |
}
|
331 |
|
332 |
/*
|
333 |
*----------------------------------------------------------------------
|
334 |
*
|
335 |
* ImgBmapConfigureInstance --
|
336 |
*
|
337 |
* This procedure is called to create displaying information for
|
338 |
* a bitmap image instance based on the configuration information
|
339 |
* in the master. It is invoked both when new instances are
|
340 |
* created and when the master is reconfigured.
|
341 |
*
|
342 |
* Results:
|
343 |
* None.
|
344 |
*
|
345 |
* Side effects:
|
346 |
* Generates errors via Tcl_BackgroundError if there are problems
|
347 |
* in setting up the instance.
|
348 |
*
|
349 |
*----------------------------------------------------------------------
|
350 |
*/
|
351 |
|
352 |
static void
|
353 |
ImgBmapConfigureInstance(instancePtr)
|
354 |
BitmapInstance *instancePtr; /* Instance to reconfigure. */
|
355 |
{
|
356 |
BitmapMaster *masterPtr = instancePtr->masterPtr;
|
357 |
XColor *colorPtr;
|
358 |
XGCValues gcValues;
|
359 |
GC gc;
|
360 |
unsigned int mask;
|
361 |
Pixmap oldMask;
|
362 |
|
363 |
/*
|
364 |
* For each of the options in masterPtr, translate the string
|
365 |
* form into an internal form appropriate for instancePtr.
|
366 |
*/
|
367 |
|
368 |
if (*masterPtr->bgUid != 0) {
|
369 |
colorPtr = Tk_GetColor(masterPtr->interp, instancePtr->tkwin,
|
370 |
masterPtr->bgUid);
|
371 |
if (colorPtr == NULL) {
|
372 |
goto error;
|
373 |
}
|
374 |
} else {
|
375 |
colorPtr = NULL;
|
376 |
}
|
377 |
if (instancePtr->bg != NULL) {
|
378 |
Tk_FreeColor(instancePtr->bg);
|
379 |
}
|
380 |
instancePtr->bg = colorPtr;
|
381 |
|
382 |
colorPtr = Tk_GetColor(masterPtr->interp, instancePtr->tkwin,
|
383 |
masterPtr->fgUid);
|
384 |
if (colorPtr == NULL) {
|
385 |
goto error;
|
386 |
}
|
387 |
if (instancePtr->fg != NULL) {
|
388 |
Tk_FreeColor(instancePtr->fg);
|
389 |
}
|
390 |
instancePtr->fg = colorPtr;
|
391 |
|
392 |
if (instancePtr->bitmap != None) {
|
393 |
Tk_FreePixmap(Tk_Display(instancePtr->tkwin), instancePtr->bitmap);
|
394 |
instancePtr->bitmap = None;
|
395 |
}
|
396 |
if (masterPtr->data != NULL) {
|
397 |
instancePtr->bitmap = XCreateBitmapFromData(
|
398 |
Tk_Display(instancePtr->tkwin),
|
399 |
RootWindowOfScreen(Tk_Screen(instancePtr->tkwin)),
|
400 |
masterPtr->data, (unsigned) masterPtr->width,
|
401 |
(unsigned) masterPtr->height);
|
402 |
}
|
403 |
|
404 |
/*
|
405 |
* Careful: We have to allocate a new mask Pixmap before deleting
|
406 |
* the old one. Otherwise, The XID allocator will always return
|
407 |
* the same XID for the new Pixmap as was used for the old Pixmap.
|
408 |
* And that will prevent the mask from changing in the GC below.
|
409 |
*/
|
410 |
oldMask = instancePtr->mask;
|
411 |
instancePtr->mask = None;
|
412 |
if (masterPtr->maskData != NULL) {
|
413 |
instancePtr->mask = XCreateBitmapFromData(
|
414 |
Tk_Display(instancePtr->tkwin),
|
415 |
RootWindowOfScreen(Tk_Screen(instancePtr->tkwin)),
|
416 |
masterPtr->maskData, (unsigned) masterPtr->width,
|
417 |
(unsigned) masterPtr->height);
|
418 |
}
|
419 |
if (oldMask != None) {
|
420 |
Tk_FreePixmap(Tk_Display(instancePtr->tkwin), oldMask);
|
421 |
}
|
422 |
|
423 |
if (masterPtr->data != NULL) {
|
424 |
gcValues.foreground = instancePtr->fg->pixel;
|
425 |
gcValues.graphics_exposures = False;
|
426 |
mask = GCForeground|GCGraphicsExposures;
|
427 |
if (instancePtr->bg != NULL) {
|
428 |
gcValues.background = instancePtr->bg->pixel;
|
429 |
mask |= GCBackground;
|
430 |
if (instancePtr->mask != None) {
|
431 |
gcValues.clip_mask = instancePtr->mask;
|
432 |
mask |= GCClipMask;
|
433 |
}
|
434 |
} else {
|
435 |
gcValues.clip_mask = instancePtr->bitmap;
|
436 |
mask |= GCClipMask;
|
437 |
}
|
438 |
gc = Tk_GetGC(instancePtr->tkwin, mask, &gcValues);
|
439 |
} else {
|
440 |
gc = None;
|
441 |
}
|
442 |
if (instancePtr->gc != None) {
|
443 |
Tk_FreeGC(Tk_Display(instancePtr->tkwin), instancePtr->gc);
|
444 |
}
|
445 |
instancePtr->gc = gc;
|
446 |
return;
|
447 |
|
448 |
error:
|
449 |
/*
|
450 |
* An error occurred: clear the graphics context in the instance to
|
451 |
* make it clear that this instance cannot be displayed. Then report
|
452 |
* the error.
|
453 |
*/
|
454 |
|
455 |
if (instancePtr->gc != None) {
|
456 |
Tk_FreeGC(Tk_Display(instancePtr->tkwin), instancePtr->gc);
|
457 |
}
|
458 |
instancePtr->gc = None;
|
459 |
Tcl_AddErrorInfo(masterPtr->interp, "\n (while configuring image \"");
|
460 |
Tcl_AddErrorInfo(masterPtr->interp, Tk_NameOfImage(masterPtr->tkMaster));
|
461 |
Tcl_AddErrorInfo(masterPtr->interp, "\")");
|
462 |
Tcl_BackgroundError(masterPtr->interp);
|
463 |
}
|
464 |
|
465 |
/*
|
466 |
*----------------------------------------------------------------------
|
467 |
*
|
468 |
* TkGetBitmapData --
|
469 |
*
|
470 |
* Given a file name or ASCII string, this procedure parses the
|
471 |
* file or string contents to produce binary data for a bitmap.
|
472 |
*
|
473 |
* Results:
|
474 |
* If the bitmap description was parsed successfully then the
|
475 |
* return value is a malloc-ed array containing the bitmap data.
|
476 |
* The dimensions of the data are stored in *widthPtr and
|
477 |
* *heightPtr. *hotXPtr and *hotYPtr are set to the bitmap
|
478 |
* hotspot if one is defined, otherwise they are set to -1, -1.
|
479 |
* If an error occurred, NULL is returned and an error message is
|
480 |
* left in the interp's result.
|
481 |
*
|
482 |
* Side effects:
|
483 |
* A bitmap is created.
|
484 |
*
|
485 |
*----------------------------------------------------------------------
|
486 |
*/
|
487 |
|
488 |
char *
|
489 |
TkGetBitmapData(interp, string, fileName, widthPtr, heightPtr,
|
490 |
hotXPtr, hotYPtr)
|
491 |
Tcl_Interp *interp; /* For reporting errors, or NULL. */
|
492 |
char *string; /* String describing bitmap. May
|
493 |
* be NULL. */
|
494 |
char *fileName; /* Name of file containing bitmap
|
495 |
* description. Used only if string
|
496 |
* is NULL. Must not be NULL if
|
497 |
* string is NULL. */
|
498 |
int *widthPtr, *heightPtr; /* Dimensions of bitmap get returned
|
499 |
* here. */
|
500 |
int *hotXPtr, *hotYPtr; /* Position of hot spot or -1,-1. */
|
501 |
{
|
502 |
int width, height, numBytes, hotX, hotY;
|
503 |
char *p, *end, *expandedFileName;
|
504 |
ParseInfo pi;
|
505 |
char *data = NULL;
|
506 |
Tcl_DString buffer;
|
507 |
|
508 |
pi.string = string;
|
509 |
if (string == NULL) {
|
510 |
if ((interp != NULL) && Tcl_IsSafe(interp)) {
|
511 |
Tcl_AppendResult(interp, "can't get bitmap data from a file in a",
|
512 |
" safe interpreter", (char *) NULL);
|
513 |
return NULL;
|
514 |
}
|
515 |
expandedFileName = Tcl_TranslateFileName(interp, fileName, &buffer);
|
516 |
if (expandedFileName == NULL) {
|
517 |
return NULL;
|
518 |
}
|
519 |
pi.chan = Tcl_OpenFileChannel(interp, expandedFileName, "r", 0);
|
520 |
Tcl_DStringFree(&buffer);
|
521 |
if (pi.chan == NULL) {
|
522 |
if (interp != NULL) {
|
523 |
Tcl_ResetResult(interp);
|
524 |
Tcl_AppendResult(interp, "couldn't read bitmap file \"",
|
525 |
fileName, "\": ", Tcl_PosixError(interp),
|
526 |
(char *) NULL);
|
527 |
}
|
528 |
return NULL;
|
529 |
}
|
530 |
|
531 |
if (Tcl_SetChannelOption(interp, pi.chan, "-translation", "binary")
|
532 |
!= TCL_OK) {
|
533 |
return NULL;
|
534 |
}
|
535 |
if (Tcl_SetChannelOption(interp, pi.chan, "-encoding", "binary")
|
536 |
!= TCL_OK) {
|
537 |
return NULL;
|
538 |
}
|
539 |
} else {
|
540 |
pi.chan = NULL;
|
541 |
}
|
542 |
|
543 |
/*
|
544 |
* Parse the lines that define the dimensions of the bitmap,
|
545 |
* plus the first line that defines the bitmap data (it declares
|
546 |
* the name of a data variable but doesn't include any actual
|
547 |
* data). These lines look something like the following:
|
548 |
*
|
549 |
* #define foo_width 16
|
550 |
* #define foo_height 16
|
551 |
* #define foo_x_hot 3
|
552 |
* #define foo_y_hot 3
|
553 |
* static char foo_bits[] = {
|
554 |
*
|
555 |
* The x_hot and y_hot lines may or may not be present. It's
|
556 |
* important to check for "char" in the last line, in order to
|
557 |
* reject old X10-style bitmaps that used shorts.
|
558 |
*/
|
559 |
|
560 |
width = 0;
|
561 |
height = 0;
|
562 |
hotX = -1;
|
563 |
hotY = -1;
|
564 |
while (1) {
|
565 |
if (NextBitmapWord(&pi) != TCL_OK) {
|
566 |
goto error;
|
567 |
}
|
568 |
if ((pi.wordLength >= 6) && (pi.word[pi.wordLength-6] == '_')
|
569 |
&& (strcmp(pi.word+pi.wordLength-6, "_width") == 0)) {
|
570 |
if (NextBitmapWord(&pi) != TCL_OK) {
|
571 |
goto error;
|
572 |
}
|
573 |
width = strtol(pi.word, &end, 0);
|
574 |
if ((end == pi.word) || (*end != 0)) {
|
575 |
goto error;
|
576 |
}
|
577 |
} else if ((pi.wordLength >= 7) && (pi.word[pi.wordLength-7] == '_')
|
578 |
&& (strcmp(pi.word+pi.wordLength-7, "_height") == 0)) {
|
579 |
if (NextBitmapWord(&pi) != TCL_OK) {
|
580 |
goto error;
|
581 |
}
|
582 |
height = strtol(pi.word, &end, 0);
|
583 |
if ((end == pi.word) || (*end != 0)) {
|
584 |
goto error;
|
585 |
}
|
586 |
} else if ((pi.wordLength >= 6) && (pi.word[pi.wordLength-6] == '_')
|
587 |
&& (strcmp(pi.word+pi.wordLength-6, "_x_hot") == 0)) {
|
588 |
if (NextBitmapWord(&pi) != TCL_OK) {
|
589 |
goto error;
|
590 |
}
|
591 |
hotX = strtol(pi.word, &end, 0);
|
592 |
if ((end == pi.word) || (*end != 0)) {
|
593 |
goto error;
|
594 |
}
|
595 |
} else if ((pi.wordLength >= 6) && (pi.word[pi.wordLength-6] == '_')
|
596 |
&& (strcmp(pi.word+pi.wordLength-6, "_y_hot") == 0)) {
|
597 |
if (NextBitmapWord(&pi) != TCL_OK) {
|
598 |
goto error;
|
599 |
}
|
600 |
hotY = strtol(pi.word, &end, 0);
|
601 |
if ((end == pi.word) || (*end != 0)) {
|
602 |
goto error;
|
603 |
}
|
604 |
} else if ((pi.word[0] == 'c') && (strcmp(pi.word, "char") == 0)) {
|
605 |
while (1) {
|
606 |
if (NextBitmapWord(&pi) != TCL_OK) {
|
607 |
goto error;
|
608 |
}
|
609 |
if ((pi.word[0] == '{') && (pi.word[1] == 0)) {
|
610 |
goto getData;
|
611 |
}
|
612 |
}
|
613 |
} else if ((pi.word[0] == '{') && (pi.word[1] == 0)) {
|
614 |
if (interp != NULL) {
|
615 |
Tcl_AppendResult(interp, "format error in bitmap data; ",
|
616 |
"looks like it's an obsolete X10 bitmap file",
|
617 |
(char *) NULL);
|
618 |
}
|
619 |
goto errorCleanup;
|
620 |
}
|
621 |
}
|
622 |
|
623 |
/*
|
624 |
* Now we've read everything but the data. Allocate an array
|
625 |
* and read in the data.
|
626 |
*/
|
627 |
|
628 |
getData:
|
629 |
if ((width <= 0) || (height <= 0)) {
|
630 |
goto error;
|
631 |
}
|
632 |
numBytes = ((width+7)/8) * height;
|
633 |
data = (char *) ckalloc((unsigned) numBytes);
|
634 |
for (p = data; numBytes > 0; p++, numBytes--) {
|
635 |
if (NextBitmapWord(&pi) != TCL_OK) {
|
636 |
goto error;
|
637 |
}
|
638 |
*p = (char) strtol(pi.word, &end, 0);
|
639 |
if (end == pi.word) {
|
640 |
goto error;
|
641 |
}
|
642 |
}
|
643 |
|
644 |
/*
|
645 |
* All done. Clean up and return.
|
646 |
*/
|
647 |
|
648 |
if (pi.chan != NULL) {
|
649 |
Tcl_Close(NULL, pi.chan);
|
650 |
}
|
651 |
*widthPtr = width;
|
652 |
*heightPtr = height;
|
653 |
*hotXPtr = hotX;
|
654 |
*hotYPtr = hotY;
|
655 |
return data;
|
656 |
|
657 |
error:
|
658 |
if (interp != NULL) {
|
659 |
Tcl_SetResult(interp, "format error in bitmap data", TCL_STATIC);
|
660 |
}
|
661 |
|
662 |
errorCleanup:
|
663 |
if (data != NULL) {
|
664 |
ckfree(data);
|
665 |
}
|
666 |
if (pi.chan != NULL) {
|
667 |
Tcl_Close(NULL, pi.chan);
|
668 |
}
|
669 |
return NULL;
|
670 |
}
|
671 |
|
672 |
/*
|
673 |
*----------------------------------------------------------------------
|
674 |
*
|
675 |
* NextBitmapWord --
|
676 |
*
|
677 |
* This procedure retrieves the next word of information (stuff
|
678 |
* between commas or white space) from a bitmap description.
|
679 |
*
|
680 |
* Results:
|
681 |
* Returns TCL_OK if all went well. In this case the next word,
|
682 |
* and its length, will be availble in *parseInfoPtr. If the end
|
683 |
* of the bitmap description was reached then TCL_ERROR is returned.
|
684 |
*
|
685 |
* Side effects:
|
686 |
* None.
|
687 |
*
|
688 |
*----------------------------------------------------------------------
|
689 |
*/
|
690 |
|
691 |
static int
|
692 |
NextBitmapWord(parseInfoPtr)
|
693 |
ParseInfo *parseInfoPtr; /* Describes what we're reading
|
694 |
* and where we are in it. */
|
695 |
{
|
696 |
char *src, *dst;
|
697 |
int c;
|
698 |
|
699 |
parseInfoPtr->wordLength = 0;
|
700 |
dst = parseInfoPtr->word;
|
701 |
if (parseInfoPtr->string != NULL) {
|
702 |
for (src = parseInfoPtr->string; isspace(UCHAR(*src)) || (*src == ',');
|
703 |
src++) {
|
704 |
if (*src == 0) {
|
705 |
return TCL_ERROR;
|
706 |
}
|
707 |
}
|
708 |
for ( ; !isspace(UCHAR(*src)) && (*src != ',') && (*src != 0); src++) {
|
709 |
*dst = *src;
|
710 |
dst++;
|
711 |
parseInfoPtr->wordLength++;
|
712 |
if (parseInfoPtr->wordLength > MAX_WORD_LENGTH) {
|
713 |
return TCL_ERROR;
|
714 |
}
|
715 |
}
|
716 |
parseInfoPtr->string = src;
|
717 |
} else {
|
718 |
for (c = GetByte(parseInfoPtr->chan); isspace(UCHAR(c)) || (c == ',');
|
719 |
c = GetByte(parseInfoPtr->chan)) {
|
720 |
if (c == EOF) {
|
721 |
return TCL_ERROR;
|
722 |
}
|
723 |
}
|
724 |
for ( ; !isspace(UCHAR(c)) && (c != ',') && (c != EOF);
|
725 |
c = GetByte(parseInfoPtr->chan)) {
|
726 |
*dst = c;
|
727 |
dst++;
|
728 |
parseInfoPtr->wordLength++;
|
729 |
if (parseInfoPtr->wordLength > MAX_WORD_LENGTH) {
|
730 |
return TCL_ERROR;
|
731 |
}
|
732 |
}
|
733 |
}
|
734 |
if (parseInfoPtr->wordLength == 0) {
|
735 |
return TCL_ERROR;
|
736 |
}
|
737 |
parseInfoPtr->word[parseInfoPtr->wordLength] = 0;
|
738 |
return TCL_OK;
|
739 |
}
|
740 |
|
741 |
/*
|
742 |
*--------------------------------------------------------------
|
743 |
*
|
744 |
* ImgBmapCmd --
|
745 |
*
|
746 |
* This procedure is invoked to process the Tcl command
|
747 |
* that corresponds to an image managed by this module.
|
748 |
* See the user documentation for details on what it does.
|
749 |
*
|
750 |
* Results:
|
751 |
* A standard Tcl result.
|
752 |
*
|
753 |
* Side effects:
|
754 |
* See the user documentation.
|
755 |
*
|
756 |
*--------------------------------------------------------------
|
757 |
*/
|
758 |
|
759 |
static int
|
760 |
ImgBmapCmd(clientData, interp, objc, objv)
|
761 |
ClientData clientData; /* Information about the image master. */
|
762 |
Tcl_Interp *interp; /* Current interpreter. */
|
763 |
int objc; /* Number of arguments. */
|
764 |
Tcl_Obj *CONST objv[]; /* Argument objects. */
|
765 |
{
|
766 |
static char *bmapOptions[] = {"cget", "configure", (char *) NULL};
|
767 |
BitmapMaster *masterPtr = (BitmapMaster *) clientData;
|
768 |
int code, index;
|
769 |
|
770 |
if (objc < 2) {
|
771 |
Tcl_WrongNumArgs(interp, 1, objv, "option ?arg arg ...?");
|
772 |
return TCL_ERROR;
|
773 |
}
|
774 |
if (Tcl_GetIndexFromObj(interp, objv[1], bmapOptions, "option", 0,
|
775 |
&index) != TCL_OK) {
|
776 |
return TCL_ERROR;
|
777 |
}
|
778 |
switch (index) {
|
779 |
case 0: {
|
780 |
if (objc != 3) {
|
781 |
Tcl_WrongNumArgs(interp, 2, objv, "option");
|
782 |
return TCL_ERROR;
|
783 |
}
|
784 |
return Tk_ConfigureValue(interp, Tk_MainWindow(interp), configSpecs,
|
785 |
(char *) masterPtr, Tcl_GetString(objv[2]), 0);
|
786 |
}
|
787 |
case 1: {
|
788 |
if (objc == 2) {
|
789 |
code = Tk_ConfigureInfo(interp, Tk_MainWindow(interp),
|
790 |
configSpecs, (char *) masterPtr, (char *) NULL, 0);
|
791 |
} else if (objc == 3) {
|
792 |
code = Tk_ConfigureInfo(interp, Tk_MainWindow(interp),
|
793 |
configSpecs, (char *) masterPtr,
|
794 |
Tcl_GetString(objv[2]), 0);
|
795 |
} else {
|
796 |
code = ImgBmapConfigureMaster(masterPtr, objc-2, objv+2,
|
797 |
TK_CONFIG_ARGV_ONLY);
|
798 |
}
|
799 |
return code;
|
800 |
}
|
801 |
default: {
|
802 |
panic("bad const entries to bmapOptions in ImgBmapCmd");
|
803 |
}
|
804 |
}
|
805 |
return TCL_OK;
|
806 |
}
|
807 |
|
808 |
/*
|
809 |
*----------------------------------------------------------------------
|
810 |
*
|
811 |
* ImgBmapGet --
|
812 |
*
|
813 |
* This procedure is called for each use of a bitmap image in a
|
814 |
* widget.
|
815 |
*
|
816 |
* Results:
|
817 |
* The return value is a token for the instance, which is passed
|
818 |
* back to us in calls to ImgBmapDisplay and ImgBmapFree.
|
819 |
*
|
820 |
* Side effects:
|
821 |
* A data structure is set up for the instance (or, an existing
|
822 |
* instance is re-used for the new one).
|
823 |
*
|
824 |
*----------------------------------------------------------------------
|
825 |
*/
|
826 |
|
827 |
static ClientData
|
828 |
ImgBmapGet(tkwin, masterData)
|
829 |
Tk_Window tkwin; /* Window in which the instance will be
|
830 |
* used. */
|
831 |
ClientData masterData; /* Pointer to our master structure for the
|
832 |
* image. */
|
833 |
{
|
834 |
BitmapMaster *masterPtr = (BitmapMaster *) masterData;
|
835 |
BitmapInstance *instancePtr;
|
836 |
|
837 |
/*
|
838 |
* See if there is already an instance for this window. If so
|
839 |
* then just re-use it.
|
840 |
*/
|
841 |
|
842 |
for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
|
843 |
instancePtr = instancePtr->nextPtr) {
|
844 |
if (instancePtr->tkwin == tkwin) {
|
845 |
instancePtr->refCount++;
|
846 |
return (ClientData) instancePtr;
|
847 |
}
|
848 |
}
|
849 |
|
850 |
/*
|
851 |
* The image isn't already in use in this window. Make a new
|
852 |
* instance of the image.
|
853 |
*/
|
854 |
|
855 |
instancePtr = (BitmapInstance *) ckalloc(sizeof(BitmapInstance));
|
856 |
instancePtr->refCount = 1;
|
857 |
instancePtr->masterPtr = masterPtr;
|
858 |
instancePtr->tkwin = tkwin;
|
859 |
instancePtr->fg = NULL;
|
860 |
instancePtr->bg = NULL;
|
861 |
instancePtr->bitmap = None;
|
862 |
instancePtr->mask = None;
|
863 |
instancePtr->gc = None;
|
864 |
instancePtr->nextPtr = masterPtr->instancePtr;
|
865 |
masterPtr->instancePtr = instancePtr;
|
866 |
ImgBmapConfigureInstance(instancePtr);
|
867 |
|
868 |
/*
|
869 |
* If this is the first instance, must set the size of the image.
|
870 |
*/
|
871 |
|
872 |
if (instancePtr->nextPtr == NULL) {
|
873 |
Tk_ImageChanged(masterPtr->tkMaster, 0, 0, 0, 0, masterPtr->width,
|
874 |
masterPtr->height);
|
875 |
}
|
876 |
|
877 |
return (ClientData) instancePtr;
|
878 |
}
|
879 |
|
880 |
/*
|
881 |
*----------------------------------------------------------------------
|
882 |
*
|
883 |
* ImgBmapDisplay --
|
884 |
*
|
885 |
* This procedure is invoked to draw a bitmap image.
|
886 |
*
|
887 |
* Results:
|
888 |
* None.
|
889 |
*
|
890 |
* Side effects:
|
891 |
* A portion of the image gets rendered in a pixmap or window.
|
892 |
*
|
893 |
*----------------------------------------------------------------------
|
894 |
*/
|
895 |
|
896 |
static void
|
897 |
ImgBmapDisplay(clientData, display, drawable, imageX, imageY, width,
|
898 |
height, drawableX, drawableY)
|
899 |
ClientData clientData; /* Pointer to BitmapInstance structure for
|
900 |
* for instance to be displayed. */
|
901 |
Display *display; /* Display on which to draw image. */
|
902 |
Drawable drawable; /* Pixmap or window in which to draw image. */
|
903 |
int imageX, imageY; /* Upper-left corner of region within image
|
904 |
* to draw. */
|
905 |
int width, height; /* Dimensions of region within image to draw. */
|
906 |
int drawableX, drawableY; /* Coordinates within drawable that
|
907 |
* correspond to imageX and imageY. */
|
908 |
{
|
909 |
BitmapInstance *instancePtr = (BitmapInstance *) clientData;
|
910 |
int masking;
|
911 |
|
912 |
/*
|
913 |
* If there's no graphics context, it means that an error occurred
|
914 |
* while creating the image instance so it can't be displayed.
|
915 |
*/
|
916 |
|
917 |
if (instancePtr->gc == None) {
|
918 |
return;
|
919 |
}
|
920 |
|
921 |
/*
|
922 |
* If masking is in effect, must modify the mask origin within
|
923 |
* the graphics context to line up with the image's origin.
|
924 |
* Then draw the image and reset the clip origin, if there's
|
925 |
* a mask.
|
926 |
*/
|
927 |
|
928 |
masking = (instancePtr->mask != None) || (instancePtr->bg == NULL);
|
929 |
if (masking) {
|
930 |
XSetClipOrigin(display, instancePtr->gc, drawableX - imageX,
|
931 |
drawableY - imageY);
|
932 |
}
|
933 |
XCopyPlane(display, instancePtr->bitmap, drawable, instancePtr->gc,
|
934 |
imageX, imageY, (unsigned) width, (unsigned) height,
|
935 |
drawableX, drawableY, 1);
|
936 |
if (masking) {
|
937 |
XSetClipOrigin(display, instancePtr->gc, 0, 0);
|
938 |
}
|
939 |
}
|
940 |
|
941 |
/*
|
942 |
*----------------------------------------------------------------------
|
943 |
*
|
944 |
* ImgBmapFree --
|
945 |
*
|
946 |
* This procedure is called when a widget ceases to use a
|
947 |
* particular instance of an image.
|
948 |
*
|
949 |
* Results:
|
950 |
* None.
|
951 |
*
|
952 |
* Side effects:
|
953 |
* Internal data structures get cleaned up.
|
954 |
*
|
955 |
*----------------------------------------------------------------------
|
956 |
*/
|
957 |
|
958 |
static void
|
959 |
ImgBmapFree(clientData, display)
|
960 |
ClientData clientData; /* Pointer to BitmapInstance structure for
|
961 |
* for instance to be displayed. */
|
962 |
Display *display; /* Display containing window that used image. */
|
963 |
{
|
964 |
BitmapInstance *instancePtr = (BitmapInstance *) clientData;
|
965 |
BitmapInstance *prevPtr;
|
966 |
|
967 |
instancePtr->refCount--;
|
968 |
if (instancePtr->refCount > 0) {
|
969 |
return;
|
970 |
}
|
971 |
|
972 |
/*
|
973 |
* There are no more uses of the image within this widget. Free
|
974 |
* the instance structure.
|
975 |
*/
|
976 |
|
977 |
if (instancePtr->fg != NULL) {
|
978 |
Tk_FreeColor(instancePtr->fg);
|
979 |
}
|
980 |
if (instancePtr->bg != NULL) {
|
981 |
Tk_FreeColor(instancePtr->bg);
|
982 |
}
|
983 |
if (instancePtr->bitmap != None) {
|
984 |
Tk_FreePixmap(display, instancePtr->bitmap);
|
985 |
}
|
986 |
if (instancePtr->mask != None) {
|
987 |
Tk_FreePixmap(display, instancePtr->mask);
|
988 |
}
|
989 |
if (instancePtr->gc != None) {
|
990 |
Tk_FreeGC(display, instancePtr->gc);
|
991 |
}
|
992 |
if (instancePtr->masterPtr->instancePtr == instancePtr) {
|
993 |
instancePtr->masterPtr->instancePtr = instancePtr->nextPtr;
|
994 |
} else {
|
995 |
for (prevPtr = instancePtr->masterPtr->instancePtr;
|
996 |
prevPtr->nextPtr != instancePtr; prevPtr = prevPtr->nextPtr) {
|
997 |
/* Empty loop body */
|
998 |
}
|
999 |
prevPtr->nextPtr = instancePtr->nextPtr;
|
1000 |
}
|
1001 |
ckfree((char *) instancePtr);
|
1002 |
}
|
1003 |
|
1004 |
/*
|
1005 |
*----------------------------------------------------------------------
|
1006 |
*
|
1007 |
* ImgBmapDelete --
|
1008 |
*
|
1009 |
* This procedure is called by the image code to delete the
|
1010 |
* master structure for an image.
|
1011 |
*
|
1012 |
* Results:
|
1013 |
* None.
|
1014 |
*
|
1015 |
* Side effects:
|
1016 |
* Resources associated with the image get freed.
|
1017 |
*
|
1018 |
*----------------------------------------------------------------------
|
1019 |
*/
|
1020 |
|
1021 |
static void
|
1022 |
ImgBmapDelete(masterData)
|
1023 |
ClientData masterData; /* Pointer to BitmapMaster structure for
|
1024 |
* image. Must not have any more instances. */
|
1025 |
{
|
1026 |
BitmapMaster *masterPtr = (BitmapMaster *) masterData;
|
1027 |
|
1028 |
if (masterPtr->instancePtr != NULL) {
|
1029 |
panic("tried to delete bitmap image when instances still exist");
|
1030 |
}
|
1031 |
masterPtr->tkMaster = NULL;
|
1032 |
if (masterPtr->imageCmd != NULL) {
|
1033 |
Tcl_DeleteCommandFromToken(masterPtr->interp, masterPtr->imageCmd);
|
1034 |
}
|
1035 |
if (masterPtr->data != NULL) {
|
1036 |
ckfree(masterPtr->data);
|
1037 |
}
|
1038 |
if (masterPtr->maskData != NULL) {
|
1039 |
ckfree(masterPtr->maskData);
|
1040 |
}
|
1041 |
Tk_FreeOptions(configSpecs, (char *) masterPtr, (Display *) NULL, 0);
|
1042 |
ckfree((char *) masterPtr);
|
1043 |
}
|
1044 |
|
1045 |
/*
|
1046 |
*----------------------------------------------------------------------
|
1047 |
*
|
1048 |
* ImgBmapCmdDeletedProc --
|
1049 |
*
|
1050 |
* This procedure is invoked when the image command for an image
|
1051 |
* is deleted. It deletes the image.
|
1052 |
*
|
1053 |
* Results:
|
1054 |
* None.
|
1055 |
*
|
1056 |
* Side effects:
|
1057 |
* The image is deleted.
|
1058 |
*
|
1059 |
*----------------------------------------------------------------------
|
1060 |
*/
|
1061 |
|
1062 |
static void
|
1063 |
ImgBmapCmdDeletedProc(clientData)
|
1064 |
ClientData clientData; /* Pointer to BitmapMaster structure for
|
1065 |
* image. */
|
1066 |
{
|
1067 |
BitmapMaster *masterPtr = (BitmapMaster *) clientData;
|
1068 |
|
1069 |
masterPtr->imageCmd = NULL;
|
1070 |
if (masterPtr->tkMaster != NULL) {
|
1071 |
Tk_DeleteImage(masterPtr->interp, Tk_NameOfImage(masterPtr->tkMaster));
|
1072 |
}
|
1073 |
}
|
1074 |
|
1075 |
/*
|
1076 |
*----------------------------------------------------------------------
|
1077 |
*
|
1078 |
* GetByte --
|
1079 |
*
|
1080 |
* Get the next byte from the open channel.
|
1081 |
*
|
1082 |
* Results:
|
1083 |
* The next byte or EOF.
|
1084 |
*
|
1085 |
* Side effects:
|
1086 |
* We read from the channel.
|
1087 |
*
|
1088 |
*----------------------------------------------------------------------
|
1089 |
*/
|
1090 |
|
1091 |
static int
|
1092 |
GetByte(chan)
|
1093 |
Tcl_Channel chan; /* The channel we read from. */
|
1094 |
{
|
1095 |
char buffer;
|
1096 |
int size;
|
1097 |
|
1098 |
size = Tcl_Read(chan, &buffer, 1);
|
1099 |
if (size <= 0) {
|
1100 |
return EOF;
|
1101 |
} else {
|
1102 |
return buffer;
|
1103 |
}
|
1104 |
}
|
1105 |
|
1106 |
|
1107 |
/*
|
1108 |
*----------------------------------------------------------------------
|
1109 |
*
|
1110 |
* ImgBmapPostscript --
|
1111 |
*
|
1112 |
* This procedure is called by the image code to create
|
1113 |
* postscript output for an image.
|
1114 |
*
|
1115 |
* Results:
|
1116 |
* None.
|
1117 |
*
|
1118 |
* Side effects:
|
1119 |
* None.
|
1120 |
*
|
1121 |
*----------------------------------------------------------------------
|
1122 |
*/
|
1123 |
|
1124 |
static int
|
1125 |
ImgBmapPostscript(clientData, interp, tkwin, psinfo, x, y, width, height,
|
1126 |
prepass)
|
1127 |
ClientData clientData;
|
1128 |
Tcl_Interp *interp;
|
1129 |
Tk_Window tkwin;
|
1130 |
Tk_PostscriptInfo psinfo;
|
1131 |
int x, y, width, height, prepass;
|
1132 |
{
|
1133 |
BitmapMaster *masterPtr = (BitmapMaster *) clientData;
|
1134 |
int rowsAtOnce, rowsThisTime;
|
1135 |
int curRow, yy;
|
1136 |
char buffer[200];
|
1137 |
|
1138 |
if (prepass) {
|
1139 |
return TCL_OK;
|
1140 |
}
|
1141 |
/*
|
1142 |
* Color the background, if there is one.
|
1143 |
*/
|
1144 |
|
1145 |
if (masterPtr->bgUid != NULL) {
|
1146 |
XColor color;
|
1147 |
XParseColor(Tk_Display(tkwin), Tk_Colormap(tkwin), masterPtr->bgUid,
|
1148 |
&color);
|
1149 |
sprintf(buffer,
|
1150 |
"%d %d moveto %d 0 rlineto 0 %d rlineto %d %s\n",
|
1151 |
x, y, width, height, -width,"0 rlineto closepath");
|
1152 |
Tcl_AppendResult(interp, buffer, (char *) NULL);
|
1153 |
if (Tk_PostscriptColor(interp, psinfo, &color) != TCL_OK) {
|
1154 |
return TCL_ERROR;
|
1155 |
}
|
1156 |
Tcl_AppendResult(interp, "fill\n", (char *) NULL);
|
1157 |
}
|
1158 |
|
1159 |
/*
|
1160 |
* Draw the bitmap, if there is a foreground color. If the bitmap
|
1161 |
* is very large, then chop it up into multiple bitmaps, each
|
1162 |
* consisting of one or more rows. This is needed because Postscript
|
1163 |
* can't handle single strings longer than 64 KBytes long.
|
1164 |
*/
|
1165 |
|
1166 |
if (masterPtr->fgUid != NULL) {
|
1167 |
XColor color;
|
1168 |
XParseColor(Tk_Display(tkwin), Tk_Colormap(tkwin), masterPtr->fgUid,
|
1169 |
&color);
|
1170 |
if (Tk_PostscriptColor(interp, psinfo, &color) != TCL_OK) {
|
1171 |
return TCL_ERROR;
|
1172 |
}
|
1173 |
if (width > 60000) {
|
1174 |
Tcl_ResetResult(interp);
|
1175 |
Tcl_AppendResult(interp, "can't generate Postscript",
|
1176 |
" for bitmaps more than 60000 pixels wide",
|
1177 |
(char *) NULL);
|
1178 |
return TCL_ERROR;
|
1179 |
}
|
1180 |
rowsAtOnce = 60000/width;
|
1181 |
if (rowsAtOnce < 1) {
|
1182 |
rowsAtOnce = 1;
|
1183 |
}
|
1184 |
sprintf(buffer, "%d %d translate\n", x, y);
|
1185 |
Tcl_AppendResult(interp, buffer, (char *) NULL);
|
1186 |
for (curRow = y+height-1; curRow >= y; curRow -= rowsAtOnce) {
|
1187 |
rowsThisTime = rowsAtOnce;
|
1188 |
if (rowsThisTime > (curRow + 1 - y)) {
|
1189 |
rowsThisTime = curRow + 1 - y;
|
1190 |
}
|
1191 |
sprintf(buffer, "%d %d", width, rowsThisTime);
|
1192 |
Tcl_AppendResult(interp, buffer, " true matrix {\n<",
|
1193 |
(char *) NULL);
|
1194 |
for (yy = curRow; yy >= (curRow - rowsThisTime + 1); yy--) {
|
1195 |
sprintf(buffer, "row %d\n", yy);
|
1196 |
Tcl_AppendResult(interp, buffer, (char *) NULL);
|
1197 |
}
|
1198 |
sprintf(buffer, "0 %.15g", (double) rowsThisTime);
|
1199 |
Tcl_AppendResult(interp, ">\n} imagemask\n", buffer,
|
1200 |
" translate\n", (char *) NULL);
|
1201 |
}
|
1202 |
}
|
1203 |
return TCL_OK;
|
1204 |
}
|
1205 |
|
1206 |
/* End of tkimgbmap.c */
|