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 %                                   Cristy                                    %
  17 %                                 July 1992                                   %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2018 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://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 "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 \f
  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 */
  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       colors=(XColor *) RelinquishMagickMemory(colors);
 319       XDestroyImage(dps_image);
 320       XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
 321         (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
 322       return(GetFirstImageInList(image));
 323     }
 324   status=SetImageExtent(image,image->columns,image->rows,exception);
 325   if (status == MagickFalse)
 326     {
 327       colors=(XColor *) RelinquishMagickMemory(colors);
 328       XDestroyImage(dps_image);
 329       XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
 330         (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
 331       return(DestroyImageList(image));
 332     }
 333   switch (image->storage_class)
 334   {
 335     case DirectClass:
 336     default:
 337     {
 338       register size_t
 339         color,
 340         index;
 341
 342       size_t
 343         blue_mask,
 344         blue_shift,
 345         green_mask,
 346         green_shift,
 347         red_mask,
 348         red_shift;
 349
 350       /*
 351         Determine shift and mask for red, green, and blue.
 352       */
 353       red_mask=visual_info->red_mask;
 354       red_shift=0;
 355       while ((red_mask != 0) && ((red_mask & 0x01) == 0))
 356       {
 357         red_mask>>=1;
 358         red_shift++;
 359       }
 360       green_mask=visual_info->green_mask;
 361       green_shift=0;
 362       while ((green_mask != 0) && ((green_mask & 0x01) == 0))
 363       {
 364         green_mask>>=1;
 365         green_shift++;
 366       }
 367       blue_mask=visual_info->blue_mask;
 368       blue_shift=0;
 369       while ((blue_mask != 0) && ((blue_mask & 0x01) == 0))
 370       {
 371         blue_mask>>=1;
 372         blue_shift++;
 373       }
 374       /*
 375         Convert X image to DirectClass packets.
 376       */
 377       if ((visual_info->colormap_size > 0) &&
 378           (visual_info->klass == DirectColor))
 379         for (y=0; y < (ssize_t) image->rows; y++)
 380         {
 381           q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 382           if (q == (Quantum *) NULL)
 383             break;
 384           for (x=0; x < (ssize_t) image->columns; x++)
 385           {
 386             pixel=XGetPixel(dps_image,x,y);
 387             index=(pixel >> red_shift) & red_mask;
 388             SetPixelRed(image,ScaleShortToQuantum(colors[index].red),q);
 389             index=(pixel >> green_shift) & green_mask;
 390             SetPixelGreen(image,ScaleShortToQuantum(colors[index].green),q);
 391             index=(pixel >> blue_shift) & blue_mask;
 392             SetPixelBlue(image,ScaleShortToQuantum(colors[index].blue),q);
 393             q+=GetPixelChannels(image);
 394           }
 395           if (SyncAuthenticPixels(image,exception) == MagickFalse)
 396             break;
 397           if (SetImageProgress(image,LoadImageTag,y,image->rows) == MagickFalse)
 398             break;
 399         }
 400       else
 401         for (y=0; y < (ssize_t) image->rows; y++)
 402         {
 403           q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 404           if (q == (Quantum *) NULL)
 405             break;
 406           for (x=0; x < (ssize_t) image->columns; x++)
 407           {
 408             pixel=XGetPixel(dps_image,x,y);
 409             color=(pixel >> red_shift) & red_mask;
 410             color=(color*65535L)/red_mask;
 411             SetPixelRed(image,ScaleShortToQuantum((unsigned short) color),q);
 412             color=(pixel >> green_shift) & green_mask;
 413             color=(color*65535L)/green_mask;
 414             SetPixelGreen(image,ScaleShortToQuantum((unsigned short) color),q);
 415             color=(pixel >> blue_shift) & blue_mask;
 416             color=(color*65535L)/blue_mask;
 417             SetPixelBlue(image,ScaleShortToQuantum((unsigned short) color),q);
 418             q+=GetPixelChannels(image);
 419           }
 420           if (SyncAuthenticPixels(image,exception) == MagickFalse)
 421             break;
 422           if (SetImageProgress(image,LoadImageTag,y,image->rows) == MagickFalse)
 423             break;
 424         }
 425       break;
 426     }
 427     case PseudoClass:
 428     {
 429       /*
 430         Create colormap.
 431       */
 432       if (AcquireImageColormap(image,(size_t) visual_info->colormap_size,exception) == MagickFalse)
 433         {
 434           image=DestroyImage(image);
 435           colors=(XColor *) RelinquishMagickMemory(colors);
 436           XDestroyImage(dps_image);
 437           XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
 438             (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
 439           return((Image *) NULL);
 440         }
 441       for (i=0; i < (ssize_t) image->colors; i++)
 442       {
 443         image->colormap[colors[i].pixel].red=ScaleShortToQuantum(colors[i].red);
 444         image->colormap[colors[i].pixel].green=
 445           ScaleShortToQuantum(colors[i].green);
 446         image->colormap[colors[i].pixel].blue=
 447           ScaleShortToQuantum(colors[i].blue);
 448       }
 449       /*
 450         Convert X image to PseudoClass packets.
 451       */
 452       for (y=0; y < (ssize_t) image->rows; y++)
 453       {
 454         q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 455         if (q == (Quantum *) NULL)
 456           break;
 457         for (x=0; x < (ssize_t) image->columns; x++)
 458         {
 459           SetPixelIndex(image,(unsigned short) XGetPixel(dps_image,x,y),q);
 460           q+=GetPixelChannels(image);
 461         }
 462         if (SyncAuthenticPixels(image,exception) == MagickFalse)
 463           break;
 464         if (SetImageProgress(image,LoadImageTag,y,image->rows) == MagickFalse)
 465           break;
 466       }
 467       break;
 468     }
 469   }
 470   colors=(XColor *) RelinquishMagickMemory(colors);
 471   XDestroyImage(dps_image);
 472   if (image->storage_class == PseudoClass)
 473     (void) SyncImage(image,exception);
 474   /*
 475     Rasterize matte image.
 476   */
 477   status=XDPSCreatePixmapForEPSF((DPSContext) NULL,screen,
 478     GetBlobFileHandle(image),1,pixels_per_point,&pixmap,&bits_per_pixel,&page);
 479   if ((status != dps_status_failure) && (status != dps_status_no_extension))
 480     {
 481       status=XDPSImageFileIntoDrawable((DPSContext) NULL,screen,pixmap,
 482         GetBlobFileHandle(image),(int) bits_per_pixel.height,1,&page,-page.x,
 483         -page.y,pixels_per_point,MagickTrue,MagickTrue,MagickTrue,&sans);
 484       if (status == dps_status_success)
 485         {
 486           XImage
 487             *matte_image;
 488
 489           /*
 490             Initialize image matte.
 491           */
 492           matte_image=XGetImage(display,pixmap,0,0,bits_per_pixel.width,
 493             bits_per_pixel.height,AllPlanes,ZPixmap);
 494           (void) XFreePixmap(display,pixmap);
 495           if (matte_image != (XImage *) NULL)
 496             {
 497               image->storage_class=DirectClass;
 498               image->alpha_trait=BlendPixelTrait;
 499               for (y=0; y < (ssize_t) image->rows; y++)
 500               {
 501                 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 502                 if (q == (Quantum *) NULL)
 503                   break;
 504                 for (x=0; x < (ssize_t) image->columns; x++)
 505                 {
 506                   SetPixelAlpha(image,OpaqueAlpha,q);
 507                   if (XGetPixel(matte_image,x,y) == 0)
 508                     SetPixelAlpha(image,TransparentAlpha,q);
 509                   q+=GetPixelChannels(image);
 510                 }
 511                 if (SyncAuthenticPixels(image,exception) == MagickFalse)
 512                   break;
 513               }
 514               XDestroyImage(matte_image);
 515             }
 516         }
 517     }
 518   /*
 519     Relinquish resources.
 520   */
 521   XFreeResources(display,visual_info,map_info,(XPixelInfo *) NULL,
 522     (XFontStruct *) NULL,&resource_info,(XWindowInfo *) NULL);
 523   (void) CloseBlob(image);
 524   return(GetFirstImageInList(image));
 525 }
 526 #endif
 527 \f
 528 /*
 529 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 530 %                                                                             %
 531 %                                                                             %
 532 %                                                                             %
 533 %   R e g i s t e r D P S I m a g e                                           %
 534 %                                                                             %
 535 %                                                                             %
 536 %                                                                             %
 537 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 538 %
 539 %  RegisterDPSImage() adds attributes for the Display Postscript image
 540 %  format to the list of supported formats.  The attributes include the image
 541 %  format tag, a method to read and/or write the format, whether the format
 542 %  supports the saving of more than one frame to the same file or blob,
 543 %  whether the format supports native in-memory I/O, and a brief
 544 %  description of the format.
 545 %
 546 %  The format of the RegisterDPSImage method is:
 547 %
 548 %      size_t RegisterDPSImage(void)
 549 %
 550 */
 551 ModuleExport size_t RegisterDPSImage(void)
 552 {
 553   MagickInfo
 554     *entry;
 555
 556   entry=AcquireMagickInfo("DPS","DPS","Display Postscript Interpreter");
 557 #if defined(MAGICKCORE_DPS_DELEGATE)
 558   entry->decoder=(DecodeImageHandler *) ReadDPSImage;
 559 #endif
 560   entry->flags^=CoderBlobSupportFlag;
 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 }