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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 1999-2016 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 %    http://www.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   register ssize_t
117     i;
118 
119   register Quantum
120     *q;
121 
122   register 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     return((Image *) NULL);
178   /*
179     Get user defaults from X resource database.
180   */
181   client_name=GetClientName();
182   resource_database=XGetResourceDatabase(display,client_name);
183   XGetResourceInfo(image_info,resource_database,client_name,&resource_info);
184   /*
185     Allocate standard colormap.
186   */
187   map_info=XAllocStandardColormap();
188   visual_info=(XVisualInfo *) NULL;
189   if (map_info == (XStandardColormap *) NULL)
190     ThrowReaderException(ResourceLimitError,"UnableToCreateStandardColormap")
191   else
192     {
193       /*
194         Initialize visual info.
195       */
196       (void) CloneString(&resource_info.visual_type,"default");
197       visual_info=XBestVisualInfo(display,map_info,&resource_info);
198       map_info->colormap=(Colormap) NULL;
199     }
200   if ((map_info == (XStandardColormap *) NULL) ||
201       (visual_info == (XVisualInfo *) NULL))
202     {
203       image=DestroyImage(image);
204       XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
205         (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
206       return((Image *) NULL);
207     }
208   /*
209     Create a pixmap the appropriate size for the image.
210   */
211   screen=ScreenOfDisplay(display,visual_info->screen);
212   pixels_per_point=XDPSPixelsPerPoint(screen);
213   if ((image->resolution.x != 0.0) && (image->resolution.y != 0.0))
214     pixels_per_point=MagickMin(image->resolution.x,image->resolution.y)/
215       DefaultResolution;
216   status=XDPSCreatePixmapForEPSF((DPSContext) NULL,screen,
217     GetBlobFileHandle(image),visual_info->depth,pixels_per_point,&pixmap,
218     &bits_per_pixel,&page);
219   if ((status == dps_status_failure) || (status == dps_status_no_extension))
220     {
221       image=DestroyImage(image);
222       XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
223         (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
224       return((Image *) NULL);
225     }
226   /*
227     Rasterize the file into the pixmap.
228   */
229   status=XDPSImageFileIntoDrawable((DPSContext) NULL,screen,pixmap,
230     GetBlobFileHandle(image),(int) bits_per_pixel.height,visual_info->depth,
231     &page,-page.x,-page.y,pixels_per_point,MagickTrue,MagickFalse,MagickTrue,
232     &sans);
233   if (status != dps_status_success)
234     {
235       image=DestroyImage(image);
236       XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
237         (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
238       return((Image *) NULL);
239     }
240   /*
241     Initialize DPS X image.
242   */
243   dps_image=XGetImage(display,pixmap,0,0,bits_per_pixel.width,
244     bits_per_pixel.height,AllPlanes,ZPixmap);
245   (void) XFreePixmap(display,pixmap);
246   if (dps_image == (XImage *) NULL)
247     {
248       image=DestroyImage(image);
249       XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
250         (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
251       return((Image *) NULL);
252     }
253   /*
254     Get the colormap colors.
255   */
256   colors=(XColor *) AcquireQuantumMemory(visual_info->colormap_size,
257     sizeof(*colors));
258   if (colors == (XColor *) NULL)
259     {
260       image=DestroyImage(image);
261       XDestroyImage(dps_image);
262       XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
263         (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
264       return((Image *) NULL);
265     }
266   if ((visual_info->klass != DirectColor) && (visual_info->klass != TrueColor))
267     for (i=0; i < visual_info->colormap_size; i++)
268     {
269       colors[i].pixel=(size_t) i;
270       colors[i].pad=0;
271     }
272   else
273     {
274       size_t
275         blue,
276         blue_bit,
277         green,
278         green_bit,
279         red,
280         red_bit;
281 
282       /*
283         DirectColor or TrueColor visual.
284       */
285       red=0;
286       green=0;
287       blue=0;
288       red_bit=visual_info->red_mask & (~(visual_info->red_mask)+1);
289       green_bit=visual_info->green_mask & (~(visual_info->green_mask)+1);
290       blue_bit=visual_info->blue_mask & (~(visual_info->blue_mask)+1);
291       for (i=0; i < visual_info->colormap_size; i++)
292       {
293         colors[i].pixel=red | green | blue;
294         colors[i].pad=0;
295         red+=red_bit;
296         if (red > visual_info->red_mask)
297           red=0;
298         green+=green_bit;
299         if (green > visual_info->green_mask)
300           green=0;
301         blue+=blue_bit;
302         if (blue > visual_info->blue_mask)
303           blue=0;
304       }
305     }
306   (void) XQueryColors(display,XDefaultColormap(display,visual_info->screen),
307     colors,visual_info->colormap_size);
308   /*
309     Convert X image to MIFF format.
310   */
311   if ((visual_info->klass != TrueColor) && (visual_info->klass != DirectColor))
312     image->storage_class=PseudoClass;
313   image->columns=(size_t) dps_image->width;
314   image->rows=(size_t) dps_image->height;
315   if (image_info->ping != MagickFalse)
316     {
317       (void) CloseBlob(image);
318       return(GetFirstImageInList(image));
319     }
320   status=SetImageExtent(image,image->columns,image->rows,exception);
321   if (status == MagickFalse)
322     return(DestroyImageList(image));
323   switch (image->storage_class)
324   {
325     case DirectClass:
326     default:
327     {
328       register size_t
329         color,
330         index;
331 
332       size_t
333         blue_mask,
334         blue_shift,
335         green_mask,
336         green_shift,
337         red_mask,
338         red_shift;
339 
340       /*
341         Determine shift and mask for red, green, and blue.
342       */
343       red_mask=visual_info->red_mask;
344       red_shift=0;
345       while ((red_mask != 0) && ((red_mask & 0x01) == 0))
346       {
347         red_mask>>=1;
348         red_shift++;
349       }
350       green_mask=visual_info->green_mask;
351       green_shift=0;
352       while ((green_mask != 0) && ((green_mask & 0x01) == 0))
353       {
354         green_mask>>=1;
355         green_shift++;
356       }
357       blue_mask=visual_info->blue_mask;
358       blue_shift=0;
359       while ((blue_mask != 0) && ((blue_mask & 0x01) == 0))
360       {
361         blue_mask>>=1;
362         blue_shift++;
363       }
364       /*
365         Convert X image to DirectClass packets.
366       */
367       if ((visual_info->colormap_size > 0) &&
368           (visual_info->klass == DirectColor))
369         for (y=0; y < (ssize_t) image->rows; y++)
370         {
371           q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
372           if (q == (Quantum *) NULL)
373             break;
374           for (x=0; x < (ssize_t) image->columns; x++)
375           {
376             pixel=XGetPixel(dps_image,x,y);
377             index=(pixel >> red_shift) & red_mask;
378             SetPixelRed(image,ScaleShortToQuantum(colors[index].red),q);
379             index=(pixel >> green_shift) & green_mask;
380             SetPixelGreen(image,ScaleShortToQuantum(colors[index].green),q);
381             index=(pixel >> blue_shift) & blue_mask;
382             SetPixelBlue(image,ScaleShortToQuantum(colors[index].blue),q);
383             q+=GetPixelChannels(image);
384           }
385           if (SyncAuthenticPixels(image,exception) == MagickFalse)
386             break;
387           if (SetImageProgress(image,LoadImageTag,y,image->rows) == MagickFalse)
388             break;
389         }
390       else
391         for (y=0; y < (ssize_t) image->rows; y++)
392         {
393           q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
394           if (q == (Quantum *) NULL)
395             break;
396           for (x=0; x < (ssize_t) image->columns; x++)
397           {
398             pixel=XGetPixel(dps_image,x,y);
399             color=(pixel >> red_shift) & red_mask;
400             color=(color*65535L)/red_mask;
401             SetPixelRed(image,ScaleShortToQuantum((unsigned short) color),q);
402             color=(pixel >> green_shift) & green_mask;
403             color=(color*65535L)/green_mask;
404             SetPixelGreen(image,ScaleShortToQuantum((unsigned short) color),q);
405             color=(pixel >> blue_shift) & blue_mask;
406             color=(color*65535L)/blue_mask;
407             SetPixelBlue(image,ScaleShortToQuantum((unsigned short) color),q);
408             q+=GetPixelChannels(image);
409           }
410           if (SyncAuthenticPixels(image,exception) == MagickFalse)
411             break;
412           if (SetImageProgress(image,LoadImageTag,y,image->rows) == MagickFalse)
413             break;
414         }
415       break;
416     }
417     case PseudoClass:
418     {
419       /*
420         Create colormap.
421       */
422       if (AcquireImageColormap(image,(size_t) visual_info->colormap_size,exception) == MagickFalse)
423         {
424           image=DestroyImage(image);
425           colors=(XColor *) RelinquishMagickMemory(colors);
426           XDestroyImage(dps_image);
427           XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
428             (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
429           return((Image *) NULL);
430         }
431       for (i=0; i < (ssize_t) image->colors; i++)
432       {
433         image->colormap[colors[i].pixel].red=ScaleShortToQuantum(colors[i].red);
434         image->colormap[colors[i].pixel].green=
435           ScaleShortToQuantum(colors[i].green);
436         image->colormap[colors[i].pixel].blue=
437           ScaleShortToQuantum(colors[i].blue);
438       }
439       /*
440         Convert X image to PseudoClass packets.
441       */
442       for (y=0; y < (ssize_t) image->rows; y++)
443       {
444         q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
445         if (q == (Quantum *) NULL)
446           break;
447         for (x=0; x < (ssize_t) image->columns; x++)
448         {
449           SetPixelIndex(image,(unsigned short) XGetPixel(dps_image,x,y),q);
450           q+=GetPixelChannels(image);
451         }
452         if (SyncAuthenticPixels(image,exception) == MagickFalse)
453           break;
454         if (SetImageProgress(image,LoadImageTag,y,image->rows) == MagickFalse)
455           break;
456       }
457       break;
458     }
459   }
460   colors=(XColor *) RelinquishMagickMemory(colors);
461   XDestroyImage(dps_image);
462   if (image->storage_class == PseudoClass)
463     (void) SyncImage(image,exception);
464   /*
465     Rasterize matte image.
466   */
467   status=XDPSCreatePixmapForEPSF((DPSContext) NULL,screen,
468     GetBlobFileHandle(image),1,pixels_per_point,&pixmap,&bits_per_pixel,&page);
469   if ((status != dps_status_failure) && (status != dps_status_no_extension))
470     {
471       status=XDPSImageFileIntoDrawable((DPSContext) NULL,screen,pixmap,
472         GetBlobFileHandle(image),(int) bits_per_pixel.height,1,&page,-page.x,
473         -page.y,pixels_per_point,MagickTrue,MagickTrue,MagickTrue,&sans);
474       if (status == dps_status_success)
475         {
476           XImage
477             *matte_image;
478 
479           /*
480             Initialize image matte.
481           */
482           matte_image=XGetImage(display,pixmap,0,0,bits_per_pixel.width,
483             bits_per_pixel.height,AllPlanes,ZPixmap);
484           (void) XFreePixmap(display,pixmap);
485           if (matte_image != (XImage *) NULL)
486             {
487               image->storage_class=DirectClass;
488               image->alpha_trait=BlendPixelTrait;
489               for (y=0; y < (ssize_t) image->rows; y++)
490               {
491                 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
492                 if (q == (Quantum *) NULL)
493                   break;
494                 for (x=0; x < (ssize_t) image->columns; x++)
495                 {
496                   SetPixelAlpha(image,OpaqueAlpha,q);
497                   if (XGetPixel(matte_image,x,y) == 0)
498                     SetPixelAlpha(image,TransparentAlpha,q);
499                   q+=GetPixelChannels(image);
500                 }
501                 if (SyncAuthenticPixels(image,exception) == MagickFalse)
502                   break;
503               }
504               XDestroyImage(matte_image);
505             }
506         }
507     }
508   /*
509     Relinquish resources.
510   */
511   XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
512     (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
513   (void) CloseBlob(image);
514   return(GetFirstImageInList(image));
515 }
516 #endif
517 
518 /*
519 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
520 %                                                                             %
521 %                                                                             %
522 %                                                                             %
523 %   R e g i s t e r D P S I m a g e                                           %
524 %                                                                             %
525 %                                                                             %
526 %                                                                             %
527 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
528 %
529 %  RegisterDPSImage() adds attributes for the Display Postscript image
530 %  format to the list of supported formats.  The attributes include the image
531 %  format tag, a method to read and/or write the format, whether the format
532 %  supports the saving of more than one frame to the same file or blob,
533 %  whether the format supports native in-memory I/O, and a brief
534 %  description of the format.
535 %
536 %  The format of the RegisterDPSImage method is:
537 %
538 %      size_t RegisterDPSImage(void)
539 %
540 */
RegisterDPSImage(void)541 ModuleExport size_t RegisterDPSImage(void)
542 {
543   MagickInfo
544     *entry;
545 
546   entry=AcquireMagickInfo("DPS","DPS","Display Postscript Interpreter");
547 #if defined(MAGICKCORE_DPS_DELEGATE)
548   entry->decoder=(DecodeImageHandler *) ReadDPSImage;
549 #endif
550   entry->flags^=CoderBlobSupportFlag;
551   (void) RegisterMagickInfo(entry);
552   return(MagickImageCoderSignature);
553 }
554 
555 /*
556 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
557 %                                                                             %
558 %                                                                             %
559 %                                                                             %
560 %   U n r e g i s t e r D P S I m a g e                                       %
561 %                                                                             %
562 %                                                                             %
563 %                                                                             %
564 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
565 %
566 %  UnregisterDPSImage() removes format registrations made by the
567 %  DPS module from the list of supported formats.
568 %
569 %  The format of the UnregisterDPSImage method is:
570 %
571 %      UnregisterDPSImage(void)
572 %
573 */
UnregisterDPSImage(void)574 ModuleExport void UnregisterDPSImage(void)
575 {
576   (void) UnregisterMagickInfo("DPS");
577 }
578