1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 % %
4 % %
5 % %
6 % DDDD PPPP SSSSS %
7 % D D P P SS %
8 % D D PPPP SSS %
9 % D D P SS %
10 % DDDD P SSSSS %
11 % %
12 % %
13 % Read Postscript Using the Display Postscript System. %
14 % %
15 % Software Design %
16 % Cristy %
17 % July 1992 %
18 % %
19 % %
20 % Copyright 1999-2021 ImageMagick Studio LLC, a non-profit organization %
21 % dedicated to making software imaging solutions freely available. %
22 % %
23 % You may not use this file except in compliance with the License. You may %
24 % obtain a copy of the License at %
25 % %
26 % https://imagemagick.org/script/license.php %
27 % %
28 % Unless required by applicable law or agreed to in writing, software %
29 % distributed under the License is distributed on an "AS IS" BASIS, %
30 % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
31 % See the License for the specific language governing permissions and %
32 % limitations under the License. %
33 % %
34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
35 %
36 %
37 */
38
39 /*
40 Include declarations.
41 */
42 #include "MagickCore/studio.h"
43 #include "MagickCore/blob.h"
44 #include "MagickCore/blob-private.h"
45 #include "MagickCore/client.h"
46 #include "MagickCore/colormap.h"
47 #include "MagickCore/exception.h"
48 #include "MagickCore/exception-private.h"
49 #include "MagickCore/image.h"
50 #include "MagickCore/image-private.h"
51 #include "MagickCore/list.h"
52 #include "MagickCore/magick.h"
53 #include "MagickCore/memory_.h"
54 #include "MagickCore/monitor.h"
55 #include "MagickCore/monitor-private.h"
56 #include "MagickCore/pixel-accessor.h"
57 #include "MagickCore/quantum-private.h"
58 #include "MagickCore/static.h"
59 #include "MagickCore/string_.h"
60 #include "MagickCore/module.h"
61 #include "MagickCore/utility.h"
62 #include "MagickCore/xwindow-private.h"
63 #if defined(MAGICKCORE_DPS_DELEGATE)
64 #include <DPS/dpsXclient.h>
65 #include <DPS/dpsXpreview.h>
66 #endif
67
68 #if defined(MAGICKCORE_DPS_DELEGATE)
69 /*
70 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
71 % %
72 % %
73 % %
74 % R e a d D P S I m a g e %
75 % %
76 % %
77 % %
78 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
79 %
80 % ReadDPSImage() reads a Adobe Postscript image file and returns it. It
81 % allocates the memory necessary for the new Image structure and returns a
82 % pointer to the new image.
83 %
84 % The format of the ReadDPSImage method is:
85 %
86 % Image *ReadDPSImage(const ImageInfo *image_info,ExceptionInfo *exception)
87 %
88 % A description of each parameter follows:
89 %
90 % o image_info: the image info.
91 %
92 % o exception: return any errors or warnings in this structure.
93 %
94 */
ReadDPSImage(const ImageInfo * image_info,ExceptionInfo * exception)95 static Image *ReadDPSImage(const ImageInfo *image_info,ExceptionInfo *exception)
96 {
97 const char
98 *client_name;
99
100 Display
101 *display;
102
103 float
104 pixels_per_point;
105
106 Image
107 *image;
108
109 int
110 sans,
111 status;
112
113 Pixmap
114 pixmap;
115
116 ssize_t
117 i;
118
119 Quantum
120 *q;
121
122 size_t
123 pixel;
124
125 Screen
126 *screen;
127
128 ssize_t
129 x,
130 y;
131
132 XColor
133 *colors;
134
135 XImage
136 *dps_image;
137
138 XRectangle
139 page,
140 bits_per_pixel;
141
142 XResourceInfo
143 resource_info;
144
145 XrmDatabase
146 resource_database;
147
148 XStandardColormap
149 *map_info;
150
151 XVisualInfo
152 *visual_info;
153
154 /*
155 Open X server connection.
156 */
157 assert(image_info != (const ImageInfo *) NULL);
158 assert(image_info->signature == MagickCoreSignature);
159 if (image_info->debug != MagickFalse)
160 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
161 image_info->filename);
162 assert(exception != (ExceptionInfo *) NULL);
163 assert(exception->signature == MagickCoreSignature);
164 display=XOpenDisplay(image_info->server_name);
165 if (display == (Display *) NULL)
166 return((Image *) NULL);
167 /*
168 Set our forgiving exception handler.
169 */
170 (void) XSetErrorHandler(XError);
171 /*
172 Open image file.
173 */
174 image=AcquireImage(image_info,exception);
175 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
176 if (status == MagickFalse)
177 {
178 image=DestroyImageList(image);
179 return((Image *) NULL);
180 }
181 /*
182 Get user defaults from X resource database.
183 */
184 client_name=GetClientName();
185 resource_database=XGetResourceDatabase(display,client_name);
186 XGetResourceInfo(image_info,resource_database,client_name,&resource_info);
187 /*
188 Allocate standard colormap.
189 */
190 map_info=XAllocStandardColormap();
191 visual_info=(XVisualInfo *) NULL;
192 if (map_info == (XStandardColormap *) NULL)
193 ThrowReaderException(ResourceLimitError,"UnableToCreateStandardColormap")
194 else
195 {
196 /*
197 Initialize visual info.
198 */
199 (void) CloneString(&resource_info.visual_type,"default");
200 visual_info=XBestVisualInfo(display,map_info,&resource_info);
201 map_info->colormap=(Colormap) NULL;
202 }
203 if ((map_info == (XStandardColormap *) NULL) ||
204 (visual_info == (XVisualInfo *) NULL))
205 {
206 image=DestroyImage(image);
207 XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
208 (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
209 return((Image *) NULL);
210 }
211 /*
212 Create a pixmap the appropriate size for the image.
213 */
214 screen=ScreenOfDisplay(display,visual_info->screen);
215 pixels_per_point=XDPSPixelsPerPoint(screen);
216 if ((image->resolution.x != 0.0) && (image->resolution.y != 0.0))
217 pixels_per_point=MagickMin(image->resolution.x,image->resolution.y)/
218 DefaultResolution;
219 status=XDPSCreatePixmapForEPSF((DPSContext) NULL,screen,
220 GetBlobFileHandle(image),visual_info->depth,pixels_per_point,&pixmap,
221 &bits_per_pixel,&page);
222 if ((status == dps_status_failure) || (status == dps_status_no_extension))
223 {
224 image=DestroyImage(image);
225 XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
226 (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
227 return((Image *) NULL);
228 }
229 /*
230 Rasterize the file into the pixmap.
231 */
232 status=XDPSImageFileIntoDrawable((DPSContext) NULL,screen,pixmap,
233 GetBlobFileHandle(image),(int) bits_per_pixel.height,visual_info->depth,
234 &page,-page.x,-page.y,pixels_per_point,MagickTrue,MagickFalse,MagickTrue,
235 &sans);
236 if (status != dps_status_success)
237 {
238 image=DestroyImage(image);
239 XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
240 (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
241 return((Image *) NULL);
242 }
243 /*
244 Initialize DPS X image.
245 */
246 dps_image=XGetImage(display,pixmap,0,0,bits_per_pixel.width,
247 bits_per_pixel.height,AllPlanes,ZPixmap);
248 (void) XFreePixmap(display,pixmap);
249 if (dps_image == (XImage *) NULL)
250 {
251 image=DestroyImage(image);
252 XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
253 (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
254 return((Image *) NULL);
255 }
256 /*
257 Get the colormap colors.
258 */
259 colors=(XColor *) AcquireQuantumMemory(visual_info->colormap_size,
260 sizeof(*colors));
261 if (colors == (XColor *) NULL)
262 {
263 image=DestroyImage(image);
264 XDestroyImage(dps_image);
265 XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
266 (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
267 return((Image *) NULL);
268 }
269 if ((visual_info->klass != DirectColor) && (visual_info->klass != TrueColor))
270 for (i=0; i < visual_info->colormap_size; i++)
271 {
272 colors[i].pixel=(size_t) i;
273 colors[i].pad=0;
274 }
275 else
276 {
277 size_t
278 blue,
279 blue_bit,
280 green,
281 green_bit,
282 red,
283 red_bit;
284
285 /*
286 DirectColor or TrueColor visual.
287 */
288 red=0;
289 green=0;
290 blue=0;
291 red_bit=visual_info->red_mask & (~(visual_info->red_mask)+1);
292 green_bit=visual_info->green_mask & (~(visual_info->green_mask)+1);
293 blue_bit=visual_info->blue_mask & (~(visual_info->blue_mask)+1);
294 for (i=0; i < visual_info->colormap_size; i++)
295 {
296 colors[i].pixel=red | green | blue;
297 colors[i].pad=0;
298 red+=red_bit;
299 if (red > visual_info->red_mask)
300 red=0;
301 green+=green_bit;
302 if (green > visual_info->green_mask)
303 green=0;
304 blue+=blue_bit;
305 if (blue > visual_info->blue_mask)
306 blue=0;
307 }
308 }
309 (void) XQueryColors(display,XDefaultColormap(display,visual_info->screen),
310 colors,visual_info->colormap_size);
311 /*
312 Convert X image to MIFF format.
313 */
314 if ((visual_info->klass != TrueColor) && (visual_info->klass != DirectColor))
315 image->storage_class=PseudoClass;
316 image->columns=(size_t) dps_image->width;
317 image->rows=(size_t) dps_image->height;
318 if (image_info->ping != MagickFalse)
319 {
320 (void) CloseBlob(image);
321 colors=(XColor *) RelinquishMagickMemory(colors);
322 XDestroyImage(dps_image);
323 XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
324 (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
325 return(GetFirstImageInList(image));
326 }
327 status=SetImageExtent(image,image->columns,image->rows,exception);
328 if (status == MagickFalse)
329 {
330 colors=(XColor *) RelinquishMagickMemory(colors);
331 XDestroyImage(dps_image);
332 XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
333 (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
334 return(DestroyImageList(image));
335 }
336 switch (image->storage_class)
337 {
338 case DirectClass:
339 default:
340 {
341 size_t
342 color,
343 index;
344
345 size_t
346 blue_mask,
347 blue_shift,
348 green_mask,
349 green_shift,
350 red_mask,
351 red_shift;
352
353 /*
354 Determine shift and mask for red, green, and blue.
355 */
356 red_mask=visual_info->red_mask;
357 red_shift=0;
358 while ((red_mask != 0) && ((red_mask & 0x01) == 0))
359 {
360 red_mask>>=1;
361 red_shift++;
362 }
363 green_mask=visual_info->green_mask;
364 green_shift=0;
365 while ((green_mask != 0) && ((green_mask & 0x01) == 0))
366 {
367 green_mask>>=1;
368 green_shift++;
369 }
370 blue_mask=visual_info->blue_mask;
371 blue_shift=0;
372 while ((blue_mask != 0) && ((blue_mask & 0x01) == 0))
373 {
374 blue_mask>>=1;
375 blue_shift++;
376 }
377 /*
378 Convert X image to DirectClass packets.
379 */
380 if ((visual_info->colormap_size > 0) &&
381 (visual_info->klass == DirectColor))
382 for (y=0; y < (ssize_t) image->rows; y++)
383 {
384 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
385 if (q == (Quantum *) NULL)
386 break;
387 for (x=0; x < (ssize_t) image->columns; x++)
388 {
389 pixel=XGetPixel(dps_image,x,y);
390 index=(pixel >> red_shift) & red_mask;
391 SetPixelRed(image,ScaleShortToQuantum(colors[index].red),q);
392 index=(pixel >> green_shift) & green_mask;
393 SetPixelGreen(image,ScaleShortToQuantum(colors[index].green),q);
394 index=(pixel >> blue_shift) & blue_mask;
395 SetPixelBlue(image,ScaleShortToQuantum(colors[index].blue),q);
396 q+=GetPixelChannels(image);
397 }
398 if (SyncAuthenticPixels(image,exception) == MagickFalse)
399 break;
400 if (SetImageProgress(image,LoadImageTag,y,image->rows) == MagickFalse)
401 break;
402 }
403 else
404 for (y=0; y < (ssize_t) image->rows; y++)
405 {
406 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
407 if (q == (Quantum *) NULL)
408 break;
409 for (x=0; x < (ssize_t) image->columns; x++)
410 {
411 pixel=XGetPixel(dps_image,x,y);
412 color=(pixel >> red_shift) & red_mask;
413 color=(color*65535L)/red_mask;
414 SetPixelRed(image,ScaleShortToQuantum((unsigned short) color),q);
415 color=(pixel >> green_shift) & green_mask;
416 color=(color*65535L)/green_mask;
417 SetPixelGreen(image,ScaleShortToQuantum((unsigned short) color),q);
418 color=(pixel >> blue_shift) & blue_mask;
419 color=(color*65535L)/blue_mask;
420 SetPixelBlue(image,ScaleShortToQuantum((unsigned short) color),q);
421 q+=GetPixelChannels(image);
422 }
423 if (SyncAuthenticPixels(image,exception) == MagickFalse)
424 break;
425 if (SetImageProgress(image,LoadImageTag,y,image->rows) == MagickFalse)
426 break;
427 }
428 break;
429 }
430 case PseudoClass:
431 {
432 /*
433 Create colormap.
434 */
435 if (AcquireImageColormap(image,(size_t) visual_info->colormap_size,exception) == MagickFalse)
436 {
437 image=DestroyImage(image);
438 colors=(XColor *) RelinquishMagickMemory(colors);
439 XDestroyImage(dps_image);
440 XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
441 (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
442 return((Image *) NULL);
443 }
444 for (i=0; i < (ssize_t) image->colors; i++)
445 {
446 image->colormap[colors[i].pixel].red=ScaleShortToQuantum(colors[i].red);
447 image->colormap[colors[i].pixel].green=
448 ScaleShortToQuantum(colors[i].green);
449 image->colormap[colors[i].pixel].blue=
450 ScaleShortToQuantum(colors[i].blue);
451 }
452 /*
453 Convert X image to PseudoClass packets.
454 */
455 for (y=0; y < (ssize_t) image->rows; y++)
456 {
457 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
458 if (q == (Quantum *) NULL)
459 break;
460 for (x=0; x < (ssize_t) image->columns; x++)
461 {
462 SetPixelIndex(image,(unsigned short) XGetPixel(dps_image,x,y),q);
463 q+=GetPixelChannels(image);
464 }
465 if (SyncAuthenticPixels(image,exception) == MagickFalse)
466 break;
467 if (SetImageProgress(image,LoadImageTag,y,image->rows) == MagickFalse)
468 break;
469 }
470 break;
471 }
472 }
473 colors=(XColor *) RelinquishMagickMemory(colors);
474 XDestroyImage(dps_image);
475 if (image->storage_class == PseudoClass)
476 (void) SyncImage(image,exception);
477 /*
478 Rasterize matte image.
479 */
480 status=XDPSCreatePixmapForEPSF((DPSContext) NULL,screen,
481 GetBlobFileHandle(image),1,pixels_per_point,&pixmap,&bits_per_pixel,&page);
482 if ((status != dps_status_failure) && (status != dps_status_no_extension))
483 {
484 status=XDPSImageFileIntoDrawable((DPSContext) NULL,screen,pixmap,
485 GetBlobFileHandle(image),(int) bits_per_pixel.height,1,&page,-page.x,
486 -page.y,pixels_per_point,MagickTrue,MagickTrue,MagickTrue,&sans);
487 if (status == dps_status_success)
488 {
489 XImage
490 *matte_image;
491
492 /*
493 Initialize image matte.
494 */
495 matte_image=XGetImage(display,pixmap,0,0,bits_per_pixel.width,
496 bits_per_pixel.height,AllPlanes,ZPixmap);
497 (void) XFreePixmap(display,pixmap);
498 if (matte_image != (XImage *) NULL)
499 {
500 image->storage_class=DirectClass;
501 image->alpha_trait=BlendPixelTrait;
502 for (y=0; y < (ssize_t) image->rows; y++)
503 {
504 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
505 if (q == (Quantum *) NULL)
506 break;
507 for (x=0; x < (ssize_t) image->columns; x++)
508 {
509 SetPixelAlpha(image,OpaqueAlpha,q);
510 if (XGetPixel(matte_image,x,y) == 0)
511 SetPixelAlpha(image,TransparentAlpha,q);
512 q+=GetPixelChannels(image);
513 }
514 if (SyncAuthenticPixels(image,exception) == MagickFalse)
515 break;
516 }
517 XDestroyImage(matte_image);
518 }
519 }
520 }
521 /*
522 Relinquish resources.
523 */
524 XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
525 (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
526 (void) CloseBlob(image);
527 return(GetFirstImageInList(image));
528 }
529 #endif
530
531 /*
532 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
533 % %
534 % %
535 % %
536 % R e g i s t e r D P S I m a g e %
537 % %
538 % %
539 % %
540 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
541 %
542 % RegisterDPSImage() adds attributes for the Display Postscript image
543 % format to the list of supported formats. The attributes include the image
544 % format tag, a method to read and/or write the format, whether the format
545 % supports the saving of more than one frame to the same file or blob,
546 % whether the format supports native in-memory I/O, and a brief
547 % description of the format.
548 %
549 % The format of the RegisterDPSImage method is:
550 %
551 % size_t RegisterDPSImage(void)
552 %
553 */
RegisterDPSImage(void)554 ModuleExport size_t RegisterDPSImage(void)
555 {
556 MagickInfo
557 *entry;
558
559 entry=AcquireMagickInfo("DPS","DPS","Display Postscript Interpreter");
560 #if defined(MAGICKCORE_DPS_DELEGATE)
561 entry->decoder=(DecodeImageHandler *) ReadDPSImage;
562 #endif
563 entry->flags^=CoderBlobSupportFlag;
564 (void) RegisterMagickInfo(entry);
565 return(MagickImageCoderSignature);
566 }
567
568 /*
569 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
570 % %
571 % %
572 % %
573 % U n r e g i s t e r D P S I m a g e %
574 % %
575 % %
576 % %
577 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
578 %
579 % UnregisterDPSImage() removes format registrations made by the
580 % DPS module from the list of supported formats.
581 %
582 % The format of the UnregisterDPSImage method is:
583 %
584 % UnregisterDPSImage(void)
585 %
586 */
UnregisterDPSImage(void)587 ModuleExport void UnregisterDPSImage(void)
588 {
589 (void) UnregisterMagickInfo("DPS");
590 }
591