granicus.if.org Git - imagemagick/blob - coders/dps.c

   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 %                                John Cristy                                  %
  17 %                                 July 1992                                   %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2011 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 \f
  39 /*
  40   Include declarations.
  41 */
  42 #include "magick/studio.h"
  43 #include "magick/blob.h"
  44 #include "magick/blob-private.h"
  45 #include "magick/client.h"
  46 #include "magick/colormap.h"
  47 #include "magick/exception.h"
  48 #include "magick/exception-private.h"
  49 #include "magick/image.h"
  50 #include "magick/image-private.h"
  51 #include "magick/list.h"
  52 #include "magick/magick.h"
  53 #include "magick/memory_.h"
  54 #include "magick/monitor.h"
  55 #include "magick/monitor-private.h"
  56 #include "magick/quantum-private.h"
  57 #include "magick/static.h"
  58 #include "magick/string_.h"
  59 #include "magick/module.h"
  60 #include "magick/utility.h"
  61 #include "magick/xwindow-private.h"
  62 #if defined(MAGICKCORE_DPS_DELEGATE)
  63 #include <DPS/dpsXclient.h>
  64 #include <DPS/dpsXpreview.h>
  65 #endif
  66 \f
  67 #if defined(MAGICKCORE_DPS_DELEGATE)
  68 /*
  69 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  70 %                                                                             %
  71 %                                                                             %
  72 %                                                                             %
  73 %   R e a d D P S I m a g e                                                   %
  74 %                                                                             %
  75 %                                                                             %
  76 %                                                                             %
  77 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  78 %
  79 %  ReadDPSImage() reads a Adobe Postscript image file and returns it.  It
  80 %  allocates the memory necessary for the new Image structure and returns a
  81 %  pointer to the new image.
  82 %
  83 %  The format of the ReadDPSImage method is:
  84 %
  85 %      Image *ReadDPSImage(const ImageInfo *image_info,ExceptionInfo *exception)
  86 %
  87 %  A description of each parameter follows:
  88 %
  89 %    o image_info: the image info.
  90 %
  91 %    o exception: return any errors or warnings in this structure.
  92 %
  93 */
  94
  95 static inline double MagickMin(const double x,const double y)
  96 {
  97   if (x < y)
  98     return(x);
  99   return(y);
 100 }
 101
 102 static Image *ReadDPSImage(const ImageInfo *image_info,ExceptionInfo *exception)
 103 {
 104   const char
 105     *client_name;
 106
 107   Display
 108     *display;
 109
 110   float
 111     pixels_per_point;
 112
 113   Image
 114     *image;
 115
 116   int
 117     sans,
 118     status;
 119
 120   Pixmap
 121     pixmap;
 122
 123   register IndexPacket
 124     *indexes;
 125
 126   register ssize_t
 127     i;
 128
 129   register PixelPacket
 130     *q;
 131
 132   register size_t
 133     pixel;
 134
 135   Screen
 136     *screen;
 137
 138   ssize_t
 139     x,
 140     y;
 141
 142   XColor
 143     *colors;
 144
 145   XImage
 146     *dps_image;
 147
 148   XRectangle
 149     page,
 150     bits_per_pixel;
 151
 152   XResourceInfo
 153     resource_info;
 154
 155   XrmDatabase
 156     resource_database;
 157
 158   XStandardColormap
 159     *map_info;
 160
 161   XVisualInfo
 162     *visual_info;
 163
 164   /*
 165     Open X server connection.
 166   */
 167   assert(image_info != (const ImageInfo *) NULL);
 168   assert(image_info->signature == MagickSignature);
 169   if (image_info->debug != MagickFalse)
 170     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 171       image_info->filename);
 172   assert(exception != (ExceptionInfo *) NULL);
 173   assert(exception->signature == MagickSignature);
 174   display=XOpenDisplay(image_info->server_name);
 175   if (display == (Display *) NULL)
 176     return((Image *) NULL);
 177   /*
 178     Set our forgiving exception handler.
 179   */
 180   (void) XSetErrorHandler(XError);
 181   /*
 182     Open image file.
 183   */
 184   image=AcquireImage(image_info);
 185   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 186   if (status == MagickFalse)
 187     return((Image *) NULL);
 188   /*
 189     Get user defaults from X resource database.
 190   */
 191   client_name=GetClientName();
 192   resource_database=XGetResourceDatabase(display,client_name);
 193   XGetResourceInfo(image_info,resource_database,client_name,&resource_info);
 194   /*
 195     Allocate standard colormap.
 196   */
 197   map_info=XAllocStandardColormap();
 198   visual_info=(XVisualInfo *) NULL;
 199   if (map_info == (XStandardColormap *) NULL)
 200     ThrowReaderException(ResourceLimitError,"UnableToCreateStandardColormap")
 201   else
 202     {
 203       /*
 204         Initialize visual info.
 205       */
 206       (void) CloneString(&resource_info.visual_type,"default");
 207       visual_info=XBestVisualInfo(display,map_info,&resource_info);
 208       map_info->colormap=(Colormap) NULL;
 209     }
 210   if ((map_info == (XStandardColormap *) NULL) ||
 211       (visual_info == (XVisualInfo *) NULL))
 212     {
 213       image=DestroyImage(image);
 214       XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
 215         (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
 216       return((Image *) NULL);
 217     }
 218   /*
 219     Create a pixmap the appropriate size for the image.
 220   */
 221   screen=ScreenOfDisplay(display,visual_info->screen);
 222   pixels_per_point=XDPSPixelsPerPoint(screen);
 223   if ((image->x_resolution != 0.0) && (image->y_resolution != 0.0))
 224     pixels_per_point=MagickMin(image->x_resolution,image->y_resolution)/
 225       DefaultResolution;
 226   status=XDPSCreatePixmapForEPSF((DPSContext) NULL,screen,
 227     GetBlobFileHandle(image),visual_info->depth,pixels_per_point,&pixmap,
 228     &bits_per_pixel,&page);
 229   if ((status == dps_status_failure) || (status == dps_status_no_extension))
 230     {
 231       image=DestroyImage(image);
 232       XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
 233         (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
 234       return((Image *) NULL);
 235     }
 236   /*
 237     Rasterize the file into the pixmap.
 238   */
 239   status=XDPSImageFileIntoDrawable((DPSContext) NULL,screen,pixmap,
 240     GetBlobFileHandle(image),(int) bits_per_pixel.height,visual_info->depth,
 241     &page,-page.x,-page.y,pixels_per_point,MagickTrue,MagickFalse,MagickTrue,
 242     &sans);
 243   if (status != dps_status_success)
 244     {
 245       image=DestroyImage(image);
 246       XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
 247         (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
 248       return((Image *) NULL);
 249     }
 250   /*
 251     Initialize DPS X image.
 252   */
 253   dps_image=XGetImage(display,pixmap,0,0,bits_per_pixel.width,
 254     bits_per_pixel.height,AllPlanes,ZPixmap);
 255   (void) XFreePixmap(display,pixmap);
 256   if (dps_image == (XImage *) NULL)
 257     {
 258       image=DestroyImage(image);
 259       XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
 260         (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
 261       return((Image *) NULL);
 262     }
 263   /*
 264     Get the colormap colors.
 265   */
 266   colors=(XColor *) AcquireQuantumMemory(visual_info->colormap_size,
 267     sizeof(*colors));
 268   if (colors == (XColor *) NULL)
 269     {
 270       image=DestroyImage(image);
 271       XDestroyImage(dps_image);
 272       XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
 273         (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
 274       return((Image *) NULL);
 275     }
 276   if ((visual_info->klass != DirectColor) && (visual_info->klass != TrueColor))
 277     for (i=0; i < visual_info->colormap_size; i++)
 278     {
 279       colors[i].pixel=(size_t) i;
 280       colors[i].pad=0;
 281     }
 282   else
 283     {
 284       size_t
 285         blue,
 286         blue_bit,
 287         green,
 288         green_bit,
 289         red,
 290         red_bit;
 291
 292       /*
 293         DirectColor or TrueColor visual.
 294       */
 295       red=0;
 296       green=0;
 297       blue=0;
 298       red_bit=visual_info->red_mask & (~(visual_info->red_mask)+1);
 299       green_bit=visual_info->green_mask & (~(visual_info->green_mask)+1);
 300       blue_bit=visual_info->blue_mask & (~(visual_info->blue_mask)+1);
 301       for (i=0; i < visual_info->colormap_size; i++)
 302       {
 303         colors[i].pixel=red | green | blue;
 304         colors[i].pad=0;
 305         red+=red_bit;
 306         if (red > visual_info->red_mask)
 307           red=0;
 308         green+=green_bit;
 309         if (green > visual_info->green_mask)
 310           green=0;
 311         blue+=blue_bit;
 312         if (blue > visual_info->blue_mask)
 313           blue=0;
 314       }
 315     }
 316   (void) XQueryColors(display,XDefaultColormap(display,visual_info->screen),
 317     colors,visual_info->colormap_size);
 318   /*
 319     Convert X image to MIFF format.
 320   */
 321   if ((visual_info->klass != TrueColor) && (visual_info->klass != DirectColor))
 322     image->storage_class=PseudoClass;
 323   image->columns=(size_t) dps_image->width;
 324   image->rows=(size_t) dps_image->height;
 325   if (image_info->ping != MagickFalse)
 326     {
 327       (void) CloseBlob(image);
 328       return(GetFirstImageInList(image));
 329     }
 330   switch (image->storage_class)
 331   {
 332     case DirectClass:
 333     default:
 334     {
 335       register size_t
 336         color,
 337         index;
 338
 339       size_t
 340         blue_mask,
 341         blue_shift,
 342         green_mask,
 343         green_shift,
 344         red_mask,
 345         red_shift;
 346
 347       /*
 348         Determine shift and mask for red, green, and blue.
 349       */
 350       red_mask=visual_info->red_mask;
 351       red_shift=0;
 352       while ((red_mask != 0) && ((red_mask & 0x01) == 0))
 353       {
 354         red_mask>>=1;
 355         red_shift++;
 356       }
 357       green_mask=visual_info->green_mask;
 358       green_shift=0;
 359       while ((green_mask != 0) && ((green_mask & 0x01) == 0))
 360       {
 361         green_mask>>=1;
 362         green_shift++;
 363       }
 364       blue_mask=visual_info->blue_mask;
 365       blue_shift=0;
 366       while ((blue_mask != 0) && ((blue_mask & 0x01) == 0))
 367       {
 368         blue_mask>>=1;
 369         blue_shift++;
 370       }
 371       /*
 372         Convert X image to DirectClass packets.
 373       */
 374       if ((visual_info->colormap_size > 0) &&
 375           (visual_info->klass == DirectColor))
 376         for (y=0; y < (ssize_t) image->rows; y++)
 377         {
 378           q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 379           if (q == (PixelPacket *) NULL)
 380             break;
 381           for (x=0; x < (ssize_t) image->columns; x++)
 382           {
 383             pixel=XGetPixel(dps_image,x,y);
 384             index=(pixel >> red_shift) & red_mask;
 385             SetRedPixelComponent(q,ScaleShortToQuantum(colors[index].red));
 386             index=(pixel >> green_shift) & green_mask;
 387             SetGreenPixelComponent(q,ScaleShortToQuantum(colors[index].green));
 388             index=(pixel >> blue_shift) & blue_mask;
 389             SetBluePixelComponent(q,ScaleShortToQuantum(colors[index].blue));
 390             q++;
 391           }
 392           if (SyncAuthenticPixels(image,exception) == MagickFalse)
 393             break;
 394           if (SetImageProgress(image,LoadImageTag,y,image->rows) == MagickFalse)
 395             break;
 396         }
 397       else
 398         for (y=0; y < (ssize_t) image->rows; y++)
 399         {
 400           q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 401           if (q == (PixelPacket *) NULL)
 402             break;
 403           for (x=0; x < (ssize_t) image->columns; x++)
 404           {
 405             pixel=XGetPixel(dps_image,x,y);
 406             color=(pixel >> red_shift) & red_mask;
 407             color=(color*65535L)/red_mask;
 408             SetRedPixelComponent(q,ScaleShortToQuantum((unsigned short) color));
 409             color=(pixel >> green_shift) & green_mask;
 410             color=(color*65535L)/green_mask;
 411             SetGreenPixelComponent(q,ScaleShortToQuantum((unsigned short)
 412               color));
 413             color=(pixel >> blue_shift) & blue_mask;
 414             color=(color*65535L)/blue_mask;
 415             SetBluePixelComponent(q,ScaleShortToQuantum((unsigned short)
 416               color));
 417             q++;
 418           }
 419           if (SyncAuthenticPixels(image,exception) == MagickFalse)
 420             break;
 421           if (SetImageProgress(image,LoadImageTag,y,image->rows) == MagickFalse)
 422             break;
 423         }
 424       break;
 425     }
 426     case PseudoClass:
 427     {
 428       /*
 429         Create colormap.
 430       */
 431       if (AcquireImageColormap(image,(size_t) visual_info->colormap_size) == MagickFalse)
 432         {
 433           image=DestroyImage(image);
 434           colors=(XColor *) RelinquishMagickMemory(colors);
 435           XDestroyImage(dps_image);
 436           XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
 437             (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
 438           return((Image *) NULL);
 439         }
 440       for (i=0; i < (ssize_t) image->colors; i++)
 441       {
 442         image->colormap[colors[i].pixel].red=ScaleShortToQuantum(colors[i].red);
 443         image->colormap[colors[i].pixel].green=
 444           ScaleShortToQuantum(colors[i].green);
 445         image->colormap[colors[i].pixel].blue=
 446           ScaleShortToQuantum(colors[i].blue);
 447       }
 448       /*
 449         Convert X image to PseudoClass packets.
 450       */
 451       for (y=0; y < (ssize_t) image->rows; y++)
 452       {
 453         q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 454         if (q == (PixelPacket *) NULL)
 455           break;
 456         indexes=GetAuthenticIndexQueue(image);
 457         for (x=0; x < (ssize_t) image->columns; x++)
 458           SetIndexPixelComponent(indexes+x,(unsigned short)
 459             XGetPixel(dps_image,x,y));
 460         if (SyncAuthenticPixels(image,exception) == MagickFalse)
 461           break;
 462         if (SetImageProgress(image,LoadImageTag,y,image->rows) == MagickFalse)
 463           break;
 464       }
 465       break;
 466     }
 467   }
 468   colors=(XColor *) RelinquishMagickMemory(colors);
 469   XDestroyImage(dps_image);
 470   if (image->storage_class == PseudoClass)
 471     (void) SyncImage(image);
 472   /*
 473     Rasterize matte image.
 474   */
 475   status=XDPSCreatePixmapForEPSF((DPSContext) NULL,screen,
 476     GetBlobFileHandle(image),1,pixels_per_point,&pixmap,&bits_per_pixel,&page);
 477   if ((status != dps_status_failure) && (status != dps_status_no_extension))
 478     {
 479       status=XDPSImageFileIntoDrawable((DPSContext) NULL,screen,pixmap,
 480         GetBlobFileHandle(image),(int) bits_per_pixel.height,1,&page,-page.x,
 481         -page.y,pixels_per_point,MagickTrue,MagickTrue,MagickTrue,&sans);
 482       if (status == dps_status_success)
 483         {
 484           XImage
 485             *matte_image;
 486
 487           /*
 488             Initialize image matte.
 489           */
 490           matte_image=XGetImage(display,pixmap,0,0,bits_per_pixel.width,
 491             bits_per_pixel.height,AllPlanes,ZPixmap);
 492           (void) XFreePixmap(display,pixmap);
 493           if (matte_image != (XImage *) NULL)
 494             {
 495               image->storage_class=DirectClass;
 496               image->matte=MagickTrue;
 497               for (y=0; y < (ssize_t) image->rows; y++)
 498               {
 499                 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 500                 if (q == (PixelPacket *) NULL)
 501                   break;
 502                 for (x=0; x < (ssize_t) image->columns; x++)
 503                 {
 504                   SetOpacityPixelComponent(q,OpaqueOpacity);
 505                   if (XGetPixel(matte_image,x,y) == 0)
 506                     SetOpacityPixelComponent(q,TransparentOpacity);
 507                   q++;
 508                 }
 509                 if (SyncAuthenticPixels(image,exception) == MagickFalse)
 510                   break;
 511               }
 512               XDestroyImage(matte_image);
 513             }
 514         }
 515     }
 516   /*
 517     Relinquish resources.
 518   */
 519   XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
 520     (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
 521   (void) CloseBlob(image);
 522   return(GetFirstImageInList(image));
 523 }
 524 #endif
 525 \f
 526 /*
 527 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 528 %                                                                             %
 529 %                                                                             %
 530 %                                                                             %
 531 %   R e g i s t e r D P S I m a g e                                           %
 532 %                                                                             %
 533 %                                                                             %
 534 %                                                                             %
 535 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 536 %
 537 %  RegisterDPSImage() adds attributes for the Display Postscript image
 538 %  format to the list of supported formats.  The attributes include the image
 539 %  format tag, a method to read and/or write the format, whether the format
 540 %  supports the saving of more than one frame to the same file or blob,
 541 %  whether the format supports native in-memory I/O, and a brief
 542 %  description of the format.
 543 %
 544 %  The format of the RegisterDPSImage method is:
 545 %
 546 %      size_t RegisterDPSImage(void)
 547 %
 548 */
 549 ModuleExport size_t RegisterDPSImage(void)
 550 {
 551   MagickInfo
 552     *entry;
 553
 554   entry=SetMagickInfo("DPS");
 555 #if defined(MAGICKCORE_DPS_DELEGATE)
 556   entry->decoder=(DecodeImageHandler *) ReadDPSImage;
 557 #endif
 558   entry->blob_support=MagickFalse;
 559   entry->description=ConstantString("Display Postscript Interpreter");
 560   entry->module=ConstantString("DPS");
 561   (void) RegisterMagickInfo(entry);
 562   return(MagickImageCoderSignature);
 563 }
 564 \f
 565 /*
 566 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 567 %                                                                             %
 568 %                                                                             %
 569 %                                                                             %
 570 %   U n r e g i s t e r D P S I m a g e                                       %
 571 %                                                                             %
 572 %                                                                             %
 573 %                                                                             %
 574 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 575 %
 576 %  UnregisterDPSImage() removes format registrations made by the
 577 %  DPS module from the list of supported formats.
 578 %
 579 %  The format of the UnregisterDPSImage method is:
 580 %
 581 %      UnregisterDPSImage(void)
 582 %
 583 */
 584 ModuleExport void UnregisterDPSImage(void)
 585 {
 586   (void) UnregisterMagickInfo("DPS");
 587 }