src/sp-image.cpp

   1 #define __SP_IMAGE_C__
   2
   3 /*
   4  * SVG <image> implementation
   5  *
   6  * Authors:
   7  *   Lauris Kaplinski <lauris@kaplinski.com>
   8  *   Edward Flick (EAF)
   9  *
  10  * Copyright (C) 1999-2005 Authors
  11  * Copyright (C) 2000-2001 Ximian, Inc.
  12  *
  13  * Released under GNU GPL, read the file 'COPYING' for more information
  14  */
  15
  16 #ifdef HAVE_CONFIG_H
  17 # include "config.h"
  18 #endif
  19 #include <libnr/nr-matrix-fns.h>
  20
  21 //#define GDK_PIXBUF_ENABLE_BACKEND 1
  22 //#include <gdk-pixbuf/gdk-pixbuf-io.h>
  23 #include "display/nr-arena-image.h"
  24
  25 //Added for preserveAspectRatio support -- EAF
  26 #include "enums.h"
  27 #include "attributes.h"
  28
  29 #include "print.h"
  30 #include "brokenimage.xpm"
  31 #include "document.h"
  32 #include "sp-image.h"
  33 #include <glibmm/i18n.h>
  34 #include "xml/quote.h"
  35 #include <xml/repr.h>
  36
  37 #include "io/sys.h"
  38 #include <png.h>
  39 #if ENABLE_LCMS
  40 #include "color-profile-fns.h"
  41 #include "color-profile.h"
  42 //#define DEBUG_LCMS
  43 #ifdef DEBUG_LCMS
  44 #include "prefs-utils.h"
  45 #include <gtk/gtkmessagedialog.h>
  46 #endif // DEBUG_LCMS
  47 #endif // ENABLE_LCMS
  48 /*
  49  * SPImage
  50  */
  51
  52
  53 static void sp_image_class_init (SPImageClass * klass);
  54 static void sp_image_init (SPImage * image);
  55
  56 static void sp_image_build (SPObject * object, SPDocument * document, Inkscape::XML::Node * repr);
  57 static void sp_image_release (SPObject * object);
  58 static void sp_image_set (SPObject *object, unsigned int key, const gchar *value);
  59 static void sp_image_update (SPObject *object, SPCtx *ctx, unsigned int flags);
  60 static Inkscape::XML::Node *sp_image_write (SPObject *object, Inkscape::XML::Node *repr, guint flags);
  61
  62 static void sp_image_bbox(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags);
  63 static void sp_image_print (SPItem * item, SPPrintContext *ctx);
  64 static gchar * sp_image_description (SPItem * item);
  65 static void sp_image_snappoints(SPItem const *item, SnapPointsIter p);
  66 static NRArenaItem *sp_image_show (SPItem *item, NRArena *arena, unsigned int key, unsigned int flags);
  67 static NR::Matrix sp_image_set_transform (SPItem *item, NR::Matrix const &xform);
  68
  69 GdkPixbuf * sp_image_repr_read_image (Inkscape::XML::Node * repr);
  70 static GdkPixbuf *sp_image_pixbuf_force_rgba (GdkPixbuf * pixbuf);
  71 static void sp_image_update_canvas_image (SPImage *image);
  72 static GdkPixbuf * sp_image_repr_read_dataURI (const gchar * uri_data);
  73 static GdkPixbuf * sp_image_repr_read_b64 (const gchar * uri_data);
  74
  75 static SPItemClass *parent_class;
  76
  77
  78 extern "C"
  79 {
  80     void user_read_data( png_structp png_ptr, png_bytep data, png_size_t length );
  81     void user_write_data( png_structp png_ptr, png_bytep data, png_size_t length );
  82     void user_flush_data( png_structp png_ptr );
  83
  84 }
  85
  86
  87 #ifdef DEBUG_LCMS
  88 extern guint update_in_progress;
  89 #define DEBUG_MESSAGE(key, ...) \
  90 {\
  91     gint dump = prefs_get_int_attribute_limited("options.scislac", #key, 0, 0, 1);\
  92     gint dumpD = prefs_get_int_attribute_limited("options.scislac", #key"D", 0, 0, 1);\
  93     gint dumpD2 = prefs_get_int_attribute_limited("options.scislac", #key"D2", 0, 0, 1);\
  94     dumpD &= ( (update_in_progress == 0) || dumpD2 );\
  95     if ( dump )\
  96     {\
  97         g_message( __VA_ARGS__ );\
  98 \
  99     }\
 100     if ( dumpD )\
 101     {\
 102         GtkWidget *dialog = gtk_message_dialog_new(NULL,\
 103                                                    GTK_DIALOG_DESTROY_WITH_PARENT, \
 104                                                    GTK_MESSAGE_INFO,    \
 105                                                    GTK_BUTTONS_OK,      \
 106                                                    __VA_ARGS__          \
 107                                                    );\
 108         g_signal_connect_swapped(dialog, "response",\
 109                                  G_CALLBACK(gtk_widget_destroy),        \
 110                                  dialog);                               \
 111         gtk_widget_show_all( dialog );\
 112     }\
 113 }
 114 #endif // DEBUG_LCMS
 115
 116 namespace Inkscape {
 117 namespace IO {
 118
 119 class PushPull
 120 {
 121 public:
 122     gboolean    first;
 123     FILE*       fp;
 124     guchar*     scratch;
 125     gsize       size;
 126     gsize       used;
 127     gsize       offset;
 128     GdkPixbufLoader *loader;
 129
 130     PushPull() : first(TRUE),
 131                  fp(0),
 132                  scratch(0),
 133                  size(0),
 134                  used(0),
 135                  offset(0),
 136                  loader(0) {};
 137
 138     gboolean readMore()
 139     {
 140         gboolean good = FALSE;
 141         if ( offset )
 142         {
 143             g_memmove( scratch, scratch + offset, used - offset );
 144             used -= offset;
 145             offset = 0;
 146         }
 147         if ( used < size )
 148         {
 149             gsize space = size - used;
 150             gsize got = fread( scratch + used, 1, space, fp );
 151             if ( got )
 152             {
 153                 if ( loader )
 154                 {
 155                     GError *err = NULL;
 156                     //g_message( " __read %d bytes", (int)got );
 157                     if ( !gdk_pixbuf_loader_write( loader, scratch + used, got, &err ) )
 158                     {
 159                         //g_message("_error writing pixbuf data");
 160                     }
 161                 }
 162
 163                 used += got;
 164                 good = TRUE;
 165             }
 166             else
 167             {
 168                 good = FALSE;
 169             }
 170         }
 171         return good;
 172     }
 173
 174     gsize available() const
 175     {
 176         return (used - offset);
 177     }
 178
 179     gsize readOut( gpointer data, gsize length )
 180     {
 181         gsize giving = available();
 182         if ( length < giving )
 183         {
 184             giving = length;
 185         }
 186         g_memmove( data, scratch + offset, giving );
 187         offset += giving;
 188         if ( offset >= used )
 189         {
 190             offset = 0;
 191             used = 0;
 192         }
 193         return giving;
 194     }
 195
 196     void clear()
 197     {
 198         offset = 0;
 199         used = 0;
 200     }
 201
 202 private:
 203     PushPull& operator = (const PushPull& other);
 204     PushPull(const PushPull& other);
 205 };
 206
 207 void user_read_data( png_structp png_ptr, png_bytep data, png_size_t length )
 208 {
 209 //    g_message( "user_read_data(%d)", length );
 210
 211     PushPull* youme = (PushPull*)png_get_io_ptr(png_ptr);
 212
 213     gsize filled = 0;
 214     gboolean canRead = TRUE;
 215
 216     while ( filled < length && canRead )
 217     {
 218         gsize some = youme->readOut( data + filled, length - filled );
 219         filled += some;
 220         if ( filled < length )
 221         {
 222             canRead &= youme->readMore();
 223         }
 224     }
 225 //    g_message("things out");
 226 }
 227
 228 void user_write_data( png_structp png_ptr, png_bytep data, png_size_t length )
 229 {
 230     //g_message( "user_write_data(%d)", length );
 231 }
 232
 233 void user_flush_data( png_structp png_ptr )
 234 {
 235     //g_message( "user_flush_data" );
 236 }
 237
 238 GdkPixbuf*  pixbuf_new_from_file( const char *filename, GError **error )
 239 {
 240     GdkPixbuf* buf = NULL;
 241     PushPull youme;
 242     gint dpiX = 0;
 243     gint dpiY = 0;
 244
 245     //buf = gdk_pixbuf_new_from_file( filename, error );
 246     dump_fopen_call( filename, "pixbuf_new_from_file" );
 247     FILE* fp = fopen_utf8name( filename, "r" );
 248     if ( fp )
 249     {
 250         GdkPixbufLoader *loader = gdk_pixbuf_loader_new();
 251         if ( loader )
 252         {
 253             GError *err = NULL;
 254
 255             // short buffer
 256             guchar scratch[1024];
 257             gboolean latter = FALSE;
 258             gboolean isPng = FALSE;
 259             png_structp pngPtr = NULL;
 260             png_infop infoPtr = NULL;
 261             //png_infop endPtr = NULL;
 262
 263             youme.fp = fp;
 264             youme.scratch = scratch;
 265             youme.size = sizeof(scratch);
 266             youme.used = 0;
 267             youme.offset = 0;
 268             youme.loader = loader;
 269
 270             while ( !feof(fp) )
 271             {
 272                 if ( youme.readMore() )
 273                 {
 274                     if ( youme.first )
 275                     {
 276                         //g_message( "First data chunk" );
 277                         youme.first = FALSE;
 278                         isPng = !png_sig_cmp( scratch + youme.offset, 0, youme.available() );
 279                         //g_message( "  png? %s", (isPng ? "Yes":"No") );
 280                         if ( isPng )
 281                         {
 282                             pngPtr = png_create_read_struct( PNG_LIBPNG_VER_STRING,
 283                                                              NULL,//(png_voidp)user_error_ptr,
 284                                                              NULL,//user_error_fn,
 285                                                              NULL//user_warning_fn
 286                                 );
 287                             if ( pngPtr )
 288                             {
 289                                 infoPtr = png_create_info_struct( pngPtr );
 290                                 //endPtr = png_create_info_struct( pngPtr );
 291
 292                                 png_set_read_fn( pngPtr, &youme, user_read_data );
 293                                 //g_message( "In" );
 294
 295                                 //png_read_info( pngPtr, infoPtr );
 296                                 png_read_png( pngPtr, infoPtr, PNG_TRANSFORM_IDENTITY, NULL );
 297
 298                                 //g_message("out");
 299
 300                                 //png_read_end(pngPtr, endPtr);
 301
 302                                 /*
 303                                 if ( png_get_valid( pngPtr, infoPtr, PNG_INFO_pHYs ) )
 304                                 {
 305                                     g_message("pHYs chunk now valid" );
 306                                 }
 307                                 if ( png_get_valid( pngPtr, infoPtr, PNG_INFO_sCAL ) )
 308                                 {
 309                                     g_message("sCAL chunk now valid" );
 310                                 }
 311                                 */
 312
 313                                 png_uint_32 res_x = 0;
 314                                 png_uint_32 res_y = 0;
 315                                 int unit_type = 0;
 316                                 if ( png_get_pHYs( pngPtr, infoPtr, &res_x, &res_y, &unit_type) )
 317                                 {
 318 //                                     g_message( "pHYs yes (%d, %d) %d (%s)", (int)res_x, (int)res_y, unit_type,
 319 //                                                (unit_type == 1? "per meter" : "unknown")
 320 //                                         );
 321
 322 //                                     g_message( "    dpi: (%d, %d)",
 323 //                                                (int)(0.5 + ((double)res_x)/39.37),
 324 //                                                (int)(0.5 + ((double)res_y)/39.37) );
 325                                     if ( unit_type == PNG_RESOLUTION_METER )
 326                                     {
 327                                         // TODO come up with a more accurate DPI setting
 328                                         dpiX = (int)(0.5 + ((double)res_x)/39.37);
 329                                         dpiY = (int)(0.5 + ((double)res_y)/39.37);
 330                                     }
 331                                 }
 332                                 else
 333                                 {
 334 //                                     g_message( "pHYs no" );
 335                                 }
 336
 337 /*
 338                                 double width = 0;
 339                                 double height = 0;
 340                                 int unit = 0;
 341                                 if ( png_get_sCAL(pngPtr, infoPtr, &unit, &width, &height) )
 342                                 {
 343                                     gchar* vals[] = {
 344                                         "unknown", // PNG_SCALE_UNKNOWN
 345                                         "meter", // PNG_SCALE_METER
 346                                         "radian", // PNG_SCALE_RADIAN
 347                                         "last", //
 348                                         NULL
 349                                     };
 350
 351                                     g_message( "sCAL: (%f, %f) %d (%s)",
 352                                                width, height, unit,
 353                                                ((unit >= 0 && unit < 3) ? vals[unit]:"???")
 354                                         );
 355                                 }
 356 */
 357
 358                                 // now clean it up.
 359                                 png_destroy_read_struct( &pngPtr, &infoPtr, NULL );//&endPtr );
 360                             }
 361                             else
 362                             {
 363                                 g_message("Error when creating PNG read struct");
 364                             }
 365                         }
 366                     }
 367                     else if ( !latter )
 368                     {
 369                         latter = TRUE;
 370                         //g_message("  READing latter");
 371                     }
 372                     // Now clear out the buffer so we can read more.
 373                     // (dumping out unused)
 374                     youme.clear();
 375                 }
 376             }
 377
 378             gboolean ok = gdk_pixbuf_loader_close(loader, &err);
 379             if ( ok )
 380             {
 381                 buf = gdk_pixbuf_loader_get_pixbuf( loader );
 382                 if ( buf )
 383                 {
 384                     g_object_ref(buf);
 385
 386                     if ( dpiX )
 387                     {
 388                         gchar *tmp = g_strdup_printf( "%d", dpiX );
 389                         if ( tmp )
 390                         {
 391                             //gdk_pixbuf_set_option( buf, "Inkscape::DpiX", tmp );
 392                             g_free( tmp );
 393                         }
 394                     }
 395                     if ( dpiY )
 396                     {
 397                         gchar *tmp = g_strdup_printf( "%d", dpiY );
 398                         if ( tmp )
 399                         {
 400                             //gdk_pixbuf_set_option( buf, "Inkscape::DpiY", tmp );
 401                             g_free( tmp );
 402                         }
 403                     }
 404                 }
 405             }
 406             else
 407             {
 408                 // do something
 409                 g_message("error loading pixbuf at close");
 410             }
 411
 412             g_object_unref(loader);
 413         }
 414         else
 415         {
 416             g_message("error when creating pixbuf loader");
 417         }
 418         fclose( fp );
 419         fp = NULL;
 420     }
 421     else
 422     {
 423         g_warning ("Unable to open linked file: %s", filename);
 424     }
 425
 426 /*
 427     if ( buf )
 428     {
 429         const gchar* bloop = gdk_pixbuf_get_option( buf, "Inkscape::DpiX" );
 430         if ( bloop )
 431         {
 432             g_message("DPI X is [%s]", bloop);
 433         }
 434         bloop = gdk_pixbuf_get_option( buf, "Inkscape::DpiY" );
 435         if ( bloop )
 436         {
 437             g_message("DPI Y is [%s]", bloop);
 438         }
 439     }
 440 */
 441
 442     return buf;
 443 }
 444
 445 }
 446 }
 447
 448 GType
 449 sp_image_get_type (void)
 450 {
 451         static GType image_type = 0;
 452         if (!image_type) {
 453                 GTypeInfo image_info = {
 454                         sizeof (SPImageClass),
 455                         NULL,   /* base_init */
 456                         NULL,   /* base_finalize */
 457                         (GClassInitFunc) sp_image_class_init,
 458                         NULL,   /* class_finalize */
 459                         NULL,   /* class_data */
 460                         sizeof (SPImage),
 461                         16,     /* n_preallocs */
 462                         (GInstanceInitFunc) sp_image_init,
 463                         NULL,   /* value_table */
 464                 };
 465                 image_type = g_type_register_static (sp_item_get_type (), "SPImage", &image_info, (GTypeFlags)0);
 466         }
 467         return image_type;
 468 }
 469
 470 static void
 471 sp_image_class_init (SPImageClass * klass)
 472 {
 473         GObjectClass * gobject_class;
 474         SPObjectClass * sp_object_class;
 475         SPItemClass * item_class;
 476
 477         gobject_class = (GObjectClass *) klass;
 478         sp_object_class = (SPObjectClass *) klass;
 479         item_class = (SPItemClass *) klass;
 480
 481         parent_class = (SPItemClass*)g_type_class_ref (sp_item_get_type ());
 482
 483         sp_object_class->build = sp_image_build;
 484         sp_object_class->release = sp_image_release;
 485         sp_object_class->set = sp_image_set;
 486         sp_object_class->update = sp_image_update;
 487         sp_object_class->write = sp_image_write;
 488
 489         item_class->bbox = sp_image_bbox;
 490         item_class->print = sp_image_print;
 491         item_class->description = sp_image_description;
 492         item_class->show = sp_image_show;
 493         item_class->snappoints = sp_image_snappoints;
 494         item_class->set_transform = sp_image_set_transform;
 495 }
 496
 497 static void
 498 sp_image_init (SPImage *image)
 499 {
 500         image->x.unset();
 501         image->y.unset();
 502         image->width.unset();
 503         image->height.unset();
 504         image->aspect_align = SP_ASPECT_NONE;
 505 }
 506
 507 static void
 508 sp_image_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
 509 {
 510         if (((SPObjectClass *) parent_class)->build)
 511                 ((SPObjectClass *) parent_class)->build (object, document, repr);
 512
 513         sp_object_read_attr (object, "xlink:href");
 514         sp_object_read_attr (object, "x");
 515         sp_object_read_attr (object, "y");
 516         sp_object_read_attr (object, "width");
 517         sp_object_read_attr (object, "height");
 518         sp_object_read_attr (object, "preserveAspectRatio");
 519         sp_object_read_attr (object, "color-profile");
 520
 521         /* Register */
 522         sp_document_add_resource (document, "image", object);
 523 }
 524
 525 static void
 526 sp_image_release (SPObject *object)
 527 {
 528         SPImage *image;
 529
 530         image = SP_IMAGE (object);
 531
 532         if (SP_OBJECT_DOCUMENT (object)) {
 533                 /* Unregister ourselves */
 534                 sp_document_remove_resource (SP_OBJECT_DOCUMENT (object), "image", SP_OBJECT (object));
 535         }
 536
 537         if (image->href) {
 538                 g_free (image->href);
 539                 image->href = NULL;
 540         }
 541
 542         if (image->pixbuf) {
 543                 gdk_pixbuf_unref (image->pixbuf);
 544                 image->pixbuf = NULL;
 545         }
 546
 547 #if ENABLE_LCMS
 548         if (image->color_profile) {
 549                 g_free (image->color_profile);
 550                 image->color_profile = NULL;
 551         }
 552 #endif // ENABLE_LCMS
 553
 554         if (((SPObjectClass *) parent_class)->release)
 555                 ((SPObjectClass *) parent_class)->release (object);
 556 }
 557
 558 static void
 559 sp_image_set (SPObject *object, unsigned int key, const gchar *value)
 560 {
 561         SPImage *image;
 562
 563         image = SP_IMAGE (object);
 564
 565         switch (key) {
 566         case SP_ATTR_XLINK_HREF:
 567                 g_free (image->href);
 568                 image->href = (value) ? g_strdup (value) : NULL;
 569                 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_IMAGE_HREF_MODIFIED_FLAG);
 570                 break;
 571         case SP_ATTR_X:
 572                 if (!image->x.readAbsolute(value)) {
 573                     /* fixme: em, ex, % are probably valid, but require special treatment (Lauris) */
 574                         image->x.unset();
 575                 }
 576                 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
 577                 break;
 578         case SP_ATTR_Y:
 579                 if (!image->y.readAbsolute(value)) {
 580                     /* fixme: em, ex, % are probably valid, but require special treatment (Lauris) */
 581                         image->y.unset();
 582                 }
 583                 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
 584                 break;
 585         case SP_ATTR_WIDTH:
 586                 if (!image->width.readAbsolute(value)) {
 587                     /* fixme: em, ex, % are probably valid, but require special treatment (Lauris) */
 588                         image->width.unset();
 589                 }
 590                 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
 591                 break;
 592         case SP_ATTR_HEIGHT:
 593                 if (!image->height.readAbsolute(value)) {
 594                     /* fixme: em, ex, % are probably valid, but require special treatment (Lauris) */
 595                         image->height.unset();
 596                 }
 597                 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
 598                 break;
 599         case SP_ATTR_PRESERVEASPECTRATIO:
 600                 /* Do setup before, so we can use break to escape */
 601                 image->aspect_align = SP_ASPECT_NONE;
 602                 image->aspect_clip = SP_ASPECT_MEET;
 603                 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
 604                 if (value) {
 605                         int len;
 606                         gchar c[256];
 607                         const gchar *p, *e;
 608                         unsigned int align, clip;
 609                         p = value;
 610                         while (*p && *p == 32) p += 1;
 611                         if (!*p) break;
 612                         e = p;
 613                         while (*e && *e != 32) e += 1;
 614                         len = e - p;
 615                         if (len > 8) break;
 616                         memcpy (c, value, len);
 617                         c[len] = 0;
 618                         /* Now the actual part */
 619                         if (!strcmp (c, "none")) {
 620                                 align = SP_ASPECT_NONE;
 621                         } else if (!strcmp (c, "xMinYMin")) {
 622                                 align = SP_ASPECT_XMIN_YMIN;
 623                         } else if (!strcmp (c, "xMidYMin")) {
 624                                 align = SP_ASPECT_XMID_YMIN;
 625                         } else if (!strcmp (c, "xMaxYMin")) {
 626                                 align = SP_ASPECT_XMAX_YMIN;
 627                         } else if (!strcmp (c, "xMinYMid")) {
 628                                 align = SP_ASPECT_XMIN_YMID;
 629                         } else if (!strcmp (c, "xMidYMid")) {
 630                                 align = SP_ASPECT_XMID_YMID;
 631                         } else if (!strcmp (c, "xMaxYMid")) {
 632                                 align = SP_ASPECT_XMAX_YMID;
 633                         } else if (!strcmp (c, "xMinYMax")) {
 634                                 align = SP_ASPECT_XMIN_YMAX;
 635                         } else if (!strcmp (c, "xMidYMax")) {
 636                                 align = SP_ASPECT_XMID_YMAX;
 637                         } else if (!strcmp (c, "xMaxYMax")) {
 638                                 align = SP_ASPECT_XMAX_YMAX;
 639                         } else {
 640                                 break;
 641                         }
 642                         clip = SP_ASPECT_MEET;
 643                         while (*e && *e == 32) e += 1;
 644                         if (e) {
 645                                 if (!strcmp (e, "meet")) {
 646                                         clip = SP_ASPECT_MEET;
 647                                 } else if (!strcmp (e, "slice")) {
 648                                         clip = SP_ASPECT_SLICE;
 649                                 } else {
 650                                         break;
 651                                 }
 652                         }
 653                         image->aspect_align = align;
 654                         image->aspect_clip = clip;
 655                 }
 656                 break;
 657 #if ENABLE_LCMS
 658         case SP_PROP_COLOR_PROFILE:
 659                 if ( image->color_profile ) {
 660                     g_free (image->color_profile);
 661                 }
 662                 image->color_profile = (value) ? g_strdup (value) : NULL;
 663 #ifdef DEBUG_LCMS
 664                 if ( value ) {
 665                     DEBUG_MESSAGE( lcmsFour, "<image> color-profile set to '%s'", value );
 666                 } else {
 667                     DEBUG_MESSAGE( lcmsFour, "<image> color-profile cleared" );
 668                 }
 669 #endif // DEBUG_LCMS
 670                 // TODO check on this HREF_MODIFIED flag
 671                 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_IMAGE_HREF_MODIFIED_FLAG);
 672                 break;
 673 #endif // ENABLE_LCMS
 674         default:
 675                 if (((SPObjectClass *) (parent_class))->set)
 676                         ((SPObjectClass *) (parent_class))->set (object, key, value);
 677                 break;
 678         }
 679 }
 680
 681 static void
 682 sp_image_update (SPObject *object, SPCtx *ctx, unsigned int flags)
 683 {
 684         SPImage *image;
 685
 686         image = (SPImage *) object;
 687
 688         if (((SPObjectClass *) (parent_class))->update)
 689                 ((SPObjectClass *) (parent_class))->update (object, ctx, flags);
 690
 691         if (flags & SP_IMAGE_HREF_MODIFIED_FLAG) {
 692                 if (image->pixbuf) {
 693                         gdk_pixbuf_unref (image->pixbuf);
 694                         image->pixbuf = NULL;
 695                 }
 696                 if (image->href) {
 697                         GdkPixbuf *pixbuf;
 698                         pixbuf = sp_image_repr_read_image (object->repr);
 699                         if (pixbuf) {
 700                                 pixbuf = sp_image_pixbuf_force_rgba (pixbuf);
 701 // BLIP
 702 #if ENABLE_LCMS
 703                                 if ( image->color_profile )
 704                                 {
 705                                     int imagewidth = gdk_pixbuf_get_width( pixbuf );
 706                                     int imageheight = gdk_pixbuf_get_height( pixbuf );
 707                                     int rowstride = gdk_pixbuf_get_rowstride( pixbuf );
 708                                     guchar* px = gdk_pixbuf_get_pixels( pixbuf );
 709
 710                                     if ( px ) {
 711 #ifdef DEBUG_LCMS
 712                                         DEBUG_MESSAGE( lcmsFive, "in <image>'s sp_image_update. About to call colorprofile_get_handle()" );
 713 #endif // DEBUG_LCMS
 714                                         guint profIntent = Inkscape::RENDERING_INTENT_UNKNOWN;
 715                                         cmsHPROFILE prof = Inkscape::colorprofile_get_handle( SP_OBJECT_DOCUMENT( object ),
 716                                                                                               &profIntent,
 717                                                                                               image->color_profile );
 718                                         if ( prof ) {
 719                                             icProfileClassSignature profileClass = cmsGetDeviceClass( prof );
 720                                             if ( profileClass != icSigNamedColorClass ) {
 721                                                 int intent = INTENT_PERCEPTUAL;
 722                                                 switch ( profIntent ) {
 723                                                     case Inkscape::RENDERING_INTENT_RELATIVE_COLORIMETRIC:
 724                                                         intent = INTENT_RELATIVE_COLORIMETRIC;
 725                                                         break;
 726                                                     case Inkscape::RENDERING_INTENT_SATURATION:
 727                                                         intent = INTENT_SATURATION;
 728                                                         break;
 729                                                     case Inkscape::RENDERING_INTENT_ABSOLUTE_COLORIMETRIC:
 730                                                         intent = INTENT_ABSOLUTE_COLORIMETRIC;
 731                                                         break;
 732                                                     case Inkscape::RENDERING_INTENT_PERCEPTUAL:
 733                                                     case Inkscape::RENDERING_INTENT_UNKNOWN:
 734                                                     case Inkscape::RENDERING_INTENT_AUTO:
 735                                                     default:
 736                                                         intent = INTENT_PERCEPTUAL;
 737                                                 }
 738                                                 cmsHPROFILE destProf = cmsCreate_sRGBProfile();
 739                                                 cmsHTRANSFORM transf = cmsCreateTransform( prof,
 740                                                                                            TYPE_RGBA_8,
 741                                                                                            destProf,
 742                                                                                            TYPE_RGBA_8,
 743                                                                                            intent, 0 );
 744                                                 if ( transf ) {
 745                                                     guchar* currLine = px;
 746                                                     for ( int y = 0; y < imageheight; y++ ) {
 747                                                         // Since the types are the same size, we can do the transformation in-place
 748                                                         cmsDoTransform( transf, currLine, currLine, imagewidth );
 749                                                         currLine += rowstride;
 750                                                     }
 751
 752                                                     cmsDeleteTransform( transf );
 753                                                 }
 754 #ifdef DEBUG_LCMS
 755                                                 else
 756                                                 {
 757                                                     DEBUG_MESSAGE( lcmsSix, "in <image>'s sp_image_update. Unable to create LCMS transform." );
 758                                                 }
 759 #endif // DEBUG_LCMS
 760                                                 cmsCloseProfile( destProf );
 761                                             }
 762 #ifdef DEBUG_LCMS
 763                                             else
 764                                             {
 765                                                 DEBUG_MESSAGE( lcmsSeven, "in <image>'s sp_image_update. Profile type is named color. Can't transform." );
 766                                             }
 767 #endif // DEBUG_LCMS
 768                                         }
 769 #ifdef DEBUG_LCMS
 770                                         else
 771                                         {
 772                                             DEBUG_MESSAGE( lcmsEight, "in <image>'s sp_image_update. No profile found." );
 773                                         }
 774 #endif // DEBUG_LCMS
 775                                     }
 776                                 }
 777 #endif // ENABLE_LCMS
 778                                 image->pixbuf = pixbuf;
 779                         }
 780                 }
 781         }
 782         // preserveAspectRatio calculate bounds / clipping rectangle -- EAF
 783         if (image->pixbuf && (image->aspect_align != SP_ASPECT_NONE)) {
 784                         int imagewidth, imageheight;
 785                         double x,y;
 786
 787                         imagewidth = gdk_pixbuf_get_width (image->pixbuf);
 788                         imageheight = gdk_pixbuf_get_height (image->pixbuf);
 789
 790                         switch (image->aspect_align) {
 791                         case SP_ASPECT_XMIN_YMIN:
 792                                 x = 0.0;
 793                                 y = 0.0;
 794                                 break;
 795                         case SP_ASPECT_XMID_YMIN:
 796                                 x = 0.5;
 797                                 y = 0.0;
 798                                 break;
 799                         case SP_ASPECT_XMAX_YMIN:
 800                                 x = 1.0;
 801                                 y = 0.0;
 802                                 break;
 803                         case SP_ASPECT_XMIN_YMID:
 804                                 x = 0.0;
 805                                 y = 0.5;
 806                                 break;
 807                         case SP_ASPECT_XMID_YMID:
 808                                 x = 0.5;
 809                                 y = 0.5;
 810                                 break;
 811                         case SP_ASPECT_XMAX_YMID:
 812                                 x = 1.0;
 813                                 y = 0.5;
 814                                 break;
 815                         case SP_ASPECT_XMIN_YMAX:
 816                                 x = 0.0;
 817                                 y = 1.0;
 818                                 break;
 819                         case SP_ASPECT_XMID_YMAX:
 820                                 x = 0.5;
 821                                 y = 1.0;
 822                                 break;
 823                         case SP_ASPECT_XMAX_YMAX:
 824                                 x = 1.0;
 825                                 y = 1.0;
 826                                 break;
 827                         default:
 828                                 x = 0.0;
 829                                 y = 0.0;
 830                                 break;
 831                         }
 832
 833                         if (image->aspect_clip == SP_ASPECT_SLICE) {
 834                                 image->viewx = image->x.computed;
 835                                 image->viewy = image->y.computed;
 836                                 image->viewwidth = image->width.computed;
 837                                 image->viewheight = image->height.computed;
 838                                 if ((imagewidth*image->height.computed)>(image->width.computed*imageheight)) {
 839                                         // Pixels aspect is wider than bounding box
 840                                         image->trimheight = imageheight;
 841                                         image->trimwidth = static_cast<int>(static_cast<double>(imageheight) * image->width.computed / image->height.computed);
 842                                         image->trimy = 0;
 843                                         image->trimx = static_cast<int>(static_cast<double>(imagewidth - image->trimwidth) * x);
 844                                 } else {
 845                                         // Pixels aspect is taller than bounding box
 846                                         image->trimwidth = imagewidth;
 847                                         image->trimheight = static_cast<int>(static_cast<double>(imagewidth) * image->height.computed / image->width.computed);
 848                                         image->trimx = 0;
 849                                         image->trimy = static_cast<int>(static_cast<double>(imageheight - image->trimheight) * y);
 850                                 }
 851                         } else {
 852                                 // Otherwise, assume SP_ASPECT_MEET
 853                                 image->trimx = 0;
 854                                 image->trimy = 0;
 855                                 image->trimwidth = imagewidth;
 856                                 image->trimheight = imageheight;
 857                                 if ((imagewidth*image->height.computed)>(image->width.computed*imageheight)) {
 858                                         // Pixels aspect is wider than bounding boz
 859                                         image->viewwidth = image->width.computed;
 860                                         image->viewheight = image->viewwidth * imageheight / imagewidth;
 861                                         image->viewx=image->x.computed;
 862                                         image->viewy=(image->height.computed - image->viewheight) * y + image->y.computed;
 863                                 } else {
 864                                         // Pixels aspect is taller than bounding box
 865                                         image->viewheight = image->height.computed;
 866                                         image->viewwidth = image->viewheight * imagewidth / imageheight;
 867                                         image->viewy=image->y.computed;
 868                                         image->viewx=(image->width.computed - image->viewwidth) * x + image->x.computed;
 869                                 }
 870                         }
 871         }
 872
 873         sp_image_update_canvas_image ((SPImage *) object);
 874 }
 875
 876 static Inkscape::XML::Node *
 877 sp_image_write (SPObject *object, Inkscape::XML::Node *repr, guint flags)
 878 {
 879         SPImage *image;
 880
 881         image = SP_IMAGE (object);
 882
 883         if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
 884                 repr = sp_repr_new ("svg:image");
 885         }
 886
 887         repr->setAttribute("xlink:href", image->href);
 888         /* fixme: Reset attribute if needed (Lauris) */
 889         if (image->x._set) sp_repr_set_svg_double(repr, "x", image->x.computed);
 890         if (image->y._set) sp_repr_set_svg_double(repr, "y", image->y.computed);
 891         if (image->width._set) sp_repr_set_svg_double(repr, "width", image->width.computed);
 892         if (image->height._set) sp_repr_set_svg_double(repr, "height", image->height.computed);
 893         repr->setAttribute("preserveAspectRatio", object->repr->attribute("preserveAspectRatio"));
 894 #if ENABLE_LCMS
 895         if (image->color_profile) repr->setAttribute("color-profile", image->color_profile);
 896 #endif // ENABLE_LCMS
 897
 898         if (((SPObjectClass *) (parent_class))->write)
 899                 ((SPObjectClass *) (parent_class))->write (object, repr, flags);
 900
 901         return repr;
 902 }
 903
 904 static void
 905 sp_image_bbox(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags)
 906 {
 907         SPImage const &image = *SP_IMAGE(item);
 908
 909         if ((image.width.computed > 0.0) && (image.height.computed > 0.0)) {
 910                 double const x0 = image.x.computed;
 911                 double const y0 = image.y.computed;
 912                 double const x1 = x0 + image.width.computed;
 913                 double const y1 = y0 + image.height.computed;
 914
 915                 nr_rect_union_pt(bbox, NR::Point(x0, y0) * transform);
 916                 nr_rect_union_pt(bbox, NR::Point(x1, y0) * transform);
 917                 nr_rect_union_pt(bbox, NR::Point(x1, y1) * transform);
 918                 nr_rect_union_pt(bbox, NR::Point(x0, y1) * transform);
 919         }
 920 }
 921
 922 static void
 923 sp_image_print (SPItem *item, SPPrintContext *ctx)
 924 {
 925         SPImage *image;
 926         NRMatrix tp, ti, s, t;
 927         guchar *px;
 928         int w, h, rs, pixskip;
 929
 930         image = SP_IMAGE (item);
 931
 932         if (!image->pixbuf) return;
 933         if ((image->width.computed <= 0.0) || (image->height.computed <= 0.0)) return;
 934
 935         px = gdk_pixbuf_get_pixels (image->pixbuf);
 936         w = gdk_pixbuf_get_width (image->pixbuf);
 937         h = gdk_pixbuf_get_height (image->pixbuf);
 938         rs = gdk_pixbuf_get_rowstride (image->pixbuf);
 939         pixskip = gdk_pixbuf_get_n_channels (image->pixbuf) * gdk_pixbuf_get_bits_per_sample (image->pixbuf) / 8;
 940
 941         if (image->aspect_align == SP_ASPECT_NONE) {
 942                 /* fixme: (Lauris) */
 943                 nr_matrix_set_translate (&tp, image->x.computed, image->y.computed);
 944                 nr_matrix_set_scale (&s, image->width.computed, -image->height.computed);
 945                 nr_matrix_set_translate (&ti, 0.0, -1.0);
 946         } else { // preserveAspectRatio
 947                 nr_matrix_set_translate (&tp, image->viewx, image->viewy);
 948                 nr_matrix_set_scale (&s, image->viewwidth, -image->viewheight);
 949                 nr_matrix_set_translate (&ti, 0.0, -1.0);
 950         }
 951
 952         nr_matrix_multiply (&t, &s, &tp);
 953         nr_matrix_multiply (&t, &ti, &t);
 954
 955         if (image->aspect_align == SP_ASPECT_NONE)
 956                 sp_print_image_R8G8B8A8_N (ctx, px, w, h, rs, &t, SP_OBJECT_STYLE (item));
 957         else // preserveAspectRatio
 958                 sp_print_image_R8G8B8A8_N (ctx, px + image->trimx*pixskip + image->trimy*rs, image->trimwidth, image->trimheight, rs, &t, SP_OBJECT_STYLE (item));
 959 }
 960
 961 static gchar *
 962 sp_image_description(SPItem *item)
 963 {
 964         SPImage *image = SP_IMAGE(item);
 965         char *href_desc;
 966         if (image->href) {
 967             href_desc = (strncmp(image->href, "data:", 5) == 0)
 968                 ? g_strdup(_("embedded"))
 969                 : xml_quote_strdup(image->href);
 970         } else {
 971             g_warning("Attempting to call strncmp() with a null pointer.");
 972             href_desc = g_strdup(_("(null_pointer)")); // we call g_free() on href_desc
 973         }
 974
 975         char *ret = ( image->pixbuf == NULL
 976                       ? g_strdup_printf(_("<b>Image with bad reference</b>: %s"), href_desc)
 977                       : g_strdup_printf(_("<b>Image</b> %d &#215; %d: %s"),
 978                                         gdk_pixbuf_get_width(image->pixbuf),
 979                                         gdk_pixbuf_get_height(image->pixbuf),
 980                                         href_desc) );
 981         g_free(href_desc);
 982         return ret;
 983 }
 984
 985 static NRArenaItem *
 986 sp_image_show (SPItem *item, NRArena *arena, unsigned int key, unsigned int flags)
 987 {
 988         int pixskip, rs;
 989         SPImage * image;
 990         NRArenaItem *ai;
 991
 992         image = (SPImage *) item;
 993
 994         ai = NRArenaImage::create(arena);
 995
 996         if (image->pixbuf) {
 997                 pixskip = gdk_pixbuf_get_n_channels (image->pixbuf) * gdk_pixbuf_get_bits_per_sample (image->pixbuf) / 8;
 998                 rs = gdk_pixbuf_get_rowstride (image->pixbuf);
 999                 nr_arena_image_set_style(NR_ARENA_IMAGE(ai), SP_OBJECT_STYLE(SP_OBJECT(item)));
1000                 if (image->aspect_align == SP_ASPECT_NONE)
1001                         nr_arena_image_set_pixels (NR_ARENA_IMAGE (ai),
1002                                            gdk_pixbuf_get_pixels (image->pixbuf),
1003                                            gdk_pixbuf_get_width (image->pixbuf),
1004                                            gdk_pixbuf_get_height (image->pixbuf),
1005                                            rs);
1006                 else // preserveAspectRatio
1007                         nr_arena_image_set_pixels (NR_ARENA_IMAGE (ai),
1008                                            gdk_pixbuf_get_pixels (image->pixbuf) + image->trimx*pixskip + image->trimy*rs,
1009                                            image->trimwidth,
1010                                            image->trimheight,
1011                                            rs);
1012         } else {
1013                 nr_arena_image_set_pixels (NR_ARENA_IMAGE (ai), NULL, 0, 0, 0);
1014         }
1015         if (image->aspect_align == SP_ASPECT_NONE)
1016                 nr_arena_image_set_geometry (NR_ARENA_IMAGE (ai), image->x.computed, image->y.computed, image->width.computed, image->height.computed);
1017         else // preserveAspectRatio
1018                 nr_arena_image_set_geometry (NR_ARENA_IMAGE (ai), image->viewx, image->viewy, image->viewwidth, image->viewheight);
1019
1020         return ai;
1021 }
1022
1023 /*
1024  * utility function to try loading image from href
1025  *
1026  * docbase/relative_src
1027  * absolute_src
1028  *
1029  */
1030
1031 GdkPixbuf *
1032 sp_image_repr_read_image (Inkscape::XML::Node * repr)
1033 {
1034         const gchar * filename, * docbase;
1035         gchar * fullname;
1036         GdkPixbuf * pixbuf;
1037
1038         filename = repr->attribute("xlink:href");
1039         if (filename == NULL) filename = repr->attribute("href"); /* FIXME */
1040         if (filename != NULL) {
1041                 if (strncmp (filename,"file:",5) == 0) {
1042                         fullname = g_filename_from_uri(filename, NULL, NULL);
1043                         if (fullname) {
1044                                 // TODO check this. Was doing a UTF-8 to filename conversion here.
1045                                 pixbuf = Inkscape::IO::pixbuf_new_from_file (fullname, NULL);
1046                                 if (pixbuf != NULL) return pixbuf;
1047                         }
1048                 } else if (strncmp (filename,"data:",5) == 0) {
1049                         /* data URI - embedded image */
1050                         filename += 5;
1051                         pixbuf = sp_image_repr_read_dataURI (filename);
1052                         if (pixbuf != NULL) return pixbuf;
1053                 } else if (!g_path_is_absolute (filename)) {
1054                         /* try to load from relative pos */
1055                         docbase = sp_repr_document_root (sp_repr_document (repr))->attribute("sodipodi:docbase");
1056                         if (!docbase) docbase = ".";
1057                         fullname = g_build_filename(docbase, filename, NULL);
1058                         pixbuf = Inkscape::IO::pixbuf_new_from_file( fullname, NULL );
1059                         g_free (fullname);
1060                         if (pixbuf != NULL) return pixbuf;
1061                 } else {
1062                         /* try absolute filename */
1063                         pixbuf = Inkscape::IO::pixbuf_new_from_file( filename, NULL );
1064                         if (pixbuf != NULL) return pixbuf;
1065                 }
1066         }
1067         /* at last try to load from sp absolute path name */
1068         filename = repr->attribute("sodipodi:absref");
1069         if (filename != NULL) {
1070                 pixbuf = Inkscape::IO::pixbuf_new_from_file( filename, NULL );
1071                 if (pixbuf != NULL) return pixbuf;
1072         }
1073         /* Nope: We do not find any valid pixmap file :-( */
1074         pixbuf = gdk_pixbuf_new_from_xpm_data ((const gchar **) brokenimage_xpm);
1075
1076         /* It should be included xpm, so if it still does not does load, */
1077         /* our libraries are broken */
1078         g_assert (pixbuf != NULL);
1079
1080         return pixbuf;
1081 }
1082
1083 static GdkPixbuf *
1084 sp_image_pixbuf_force_rgba (GdkPixbuf * pixbuf)
1085 {
1086         GdkPixbuf * newbuf;
1087
1088         if (gdk_pixbuf_get_has_alpha (pixbuf)) return pixbuf;
1089
1090         newbuf = gdk_pixbuf_add_alpha (pixbuf, FALSE, 0, 0, 0);
1091         gdk_pixbuf_unref (pixbuf);
1092
1093         return newbuf;
1094 }
1095
1096 /* We assert that realpixbuf is either NULL or identical size to pixbuf */
1097
1098 static void
1099 sp_image_update_canvas_image (SPImage *image)
1100 {
1101         int rs, pixskip;
1102         SPItem *item;
1103         SPItemView *v;
1104
1105         item = SP_ITEM (image);
1106
1107         if (image->pixbuf) {
1108                 /* fixme: We are slightly violating spec here (Lauris) */
1109                 if (!image->width._set) {
1110                         image->width.computed = gdk_pixbuf_get_width (image->pixbuf);
1111                 }
1112                 if (!image->height._set) {
1113                         image->height.computed = gdk_pixbuf_get_height (image->pixbuf);
1114                 }
1115         }
1116
1117         for (v = item->display; v != NULL; v = v->next) {
1118                 pixskip = gdk_pixbuf_get_n_channels (image->pixbuf) * gdk_pixbuf_get_bits_per_sample (image->pixbuf) / 8;
1119                 rs = gdk_pixbuf_get_rowstride (image->pixbuf);
1120                 nr_arena_image_set_style (NR_ARENA_IMAGE(v->arenaitem), SP_OBJECT_STYLE(SP_OBJECT(image)));
1121                 if (image->aspect_align == SP_ASPECT_NONE) {
1122                         nr_arena_image_set_pixels (NR_ARENA_IMAGE (v->arenaitem),
1123                                            gdk_pixbuf_get_pixels (image->pixbuf),
1124                                            gdk_pixbuf_get_width (image->pixbuf),
1125                                            gdk_pixbuf_get_height (image->pixbuf),
1126                                            rs);
1127                         nr_arena_image_set_geometry (NR_ARENA_IMAGE (v->arenaitem),
1128                                              image->x.computed, image->y.computed,
1129                                              image->width.computed, image->height.computed);
1130                 } else { // preserveAspectRatio
1131                         nr_arena_image_set_pixels (NR_ARENA_IMAGE (v->arenaitem),
1132                                            gdk_pixbuf_get_pixels (image->pixbuf) + image->trimx*pixskip + image->trimy*rs,
1133                                            image->trimwidth,
1134                                            image->trimheight,
1135                                            rs);
1136                         nr_arena_image_set_geometry (NR_ARENA_IMAGE (v->arenaitem),
1137                                              image->viewx, image->viewy,
1138                                              image->viewwidth, image->viewheight);
1139                 }
1140         }
1141 }
1142
1143 static void sp_image_snappoints(SPItem const *item, SnapPointsIter p)
1144 {
1145      if (((SPItemClass *) parent_class)->snappoints) {
1146          ((SPItemClass *) parent_class)->snappoints (item, p);
1147      }
1148 }
1149
1150 /*
1151  * Initially we'll do:
1152  * Transform x, y, set x, y, clear translation
1153  */
1154
1155 static NR::Matrix
1156 sp_image_set_transform(SPItem *item, NR::Matrix const &xform)
1157 {
1158         SPImage *image = SP_IMAGE(item);
1159
1160         /* Calculate position in parent coords. */
1161         NR::Point pos( NR::Point(image->x.computed, image->y.computed) * xform );
1162
1163         /* This function takes care of translation and scaling, we return whatever parts we can't
1164            handle. */
1165         NR::Matrix ret(NR::transform(xform));
1166         NR::Point const scale(hypot(ret[0], ret[1]),
1167                               hypot(ret[2], ret[3]));
1168         if ( scale[NR::X] > 1e-9 ) {
1169                 ret[0] /= scale[NR::X];
1170                 ret[1] /= scale[NR::X];
1171         } else {
1172                 ret[0] = 1.0;
1173                 ret[1] = 0.0;
1174         }
1175         if ( scale[NR::Y] > 1e-9 ) {
1176                 ret[2] /= scale[NR::Y];
1177                 ret[3] /= scale[NR::Y];
1178         } else {
1179                 ret[2] = 0.0;
1180                 ret[3] = 1.0;
1181         }
1182
1183         image->width = image->width.computed * scale[NR::X];
1184         image->height = image->height.computed * scale[NR::Y];
1185
1186         /* Find position in item coords */
1187         pos = pos * ret.inverse();
1188         image->x = pos[NR::X];
1189         image->y = pos[NR::Y];
1190
1191         item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
1192
1193         return ret;
1194 }
1195
1196 static GdkPixbuf *
1197 sp_image_repr_read_dataURI (const gchar * uri_data)
1198 {       GdkPixbuf * pixbuf = NULL;
1199
1200         gint data_is_image = 0;
1201         gint data_is_base64 = 0;
1202
1203         const gchar * data = uri_data;
1204
1205         while (*data) {
1206                 if (strncmp (data,"base64",6) == 0) {
1207                         /* base64-encoding */
1208                         data_is_base64 = 1;
1209                         data_is_image = 1; // Illustrator produces embedded images without MIME type, so we assume it's image no matter what
1210                         data += 6;
1211                 }
1212                 else if (strncmp (data,"image/png",9) == 0) {
1213                         /* PNG image */
1214                         data_is_image = 1;
1215                         data += 9;
1216                 }
1217                 else if (strncmp (data,"image/jpg",9) == 0) {
1218                         /* JPEG image */
1219                         data_is_image = 1;
1220                         data += 9;
1221                 }
1222                 else if (strncmp (data,"image/jpeg",10) == 0) {
1223                         /* JPEG image */
1224                         data_is_image = 1;
1225                         data += 10;
1226                 }
1227                 else { /* unrecognized option; skip it */
1228                         while (*data) {
1229                                 if (((*data) == ';') || ((*data) == ',')) break;
1230                                 data++;
1231                         }
1232                 }
1233                 if ((*data) == ';') {
1234                         data++;
1235                         continue;
1236                 }
1237                 if ((*data) == ',') {
1238                         data++;
1239                         break;
1240                 }
1241         }
1242
1243         if ((*data) && data_is_image && data_is_base64) {
1244                 pixbuf = sp_image_repr_read_b64 (data);
1245         }
1246
1247         return pixbuf;
1248 }
1249
1250 static GdkPixbuf *
1251 sp_image_repr_read_b64 (const gchar * uri_data)
1252 {       GdkPixbuf * pixbuf = NULL;
1253         GdkPixbufLoader * loader = NULL;
1254
1255         gint j;
1256         gint k;
1257         gint l;
1258         gint b;
1259         gint len;
1260         gint eos = 0;
1261         gint failed = 0;
1262
1263         guint32 bits;
1264
1265         static const gchar B64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
1266
1267         const gchar* btr = uri_data;
1268
1269         gchar ud[4];
1270
1271         guchar bd[57];
1272
1273         loader = gdk_pixbuf_loader_new ();
1274
1275         if (loader == NULL) return NULL;
1276
1277         while (eos == 0) {
1278                 l = 0;
1279                 for (j = 0; j < 19; j++) {
1280                         len = 0;
1281                         for (k = 0; k < 4; k++) {
1282                                 while (isspace ((int) (*btr))) {
1283                                         if ((*btr) == '\0') break;
1284                                         btr++;
1285                                 }
1286                                 if (eos) {
1287                                         ud[k] = 0;
1288                                         continue;
1289                                 }
1290                                 if (((*btr) == '\0') || ((*btr) == '=')) {
1291                                         eos = 1;
1292                                         ud[k] = 0;
1293                                         continue;
1294                                 }
1295                                 ud[k] = 64;
1296                                 for (b = 0; b < 64; b++) { /* There must a faster way to do this... ?? */
1297                                         if (B64[b] == (*btr)) {
1298                                                 ud[k] = (gchar) b;
1299                                                 break;
1300                                         }
1301                                 }
1302                                 if (ud[k] == 64) { /* data corruption ?? */
1303                                         eos = 1;
1304                                         ud[k] = 0;
1305                                         continue;
1306                                 }
1307                                 btr++;
1308                                 len++;
1309                         }
1310                         bits = (guint32) ud[0];
1311                         bits = (bits << 6) | (guint32) ud[1];
1312                         bits = (bits << 6) | (guint32) ud[2];
1313                         bits = (bits << 6) | (guint32) ud[3];
1314                         bd[l++] = (guchar) ((bits & 0xff0000) >> 16);
1315                         if (len > 2) {
1316                                 bd[l++] = (guchar) ((bits & 0xff00) >>  8);
1317                         }
1318                         if (len > 3) {
1319                                 bd[l++] = (guchar)  (bits & 0xff);
1320                         }
1321                 }
1322
1323                 if (!gdk_pixbuf_loader_write (loader, (const guchar *) bd, (size_t) l, NULL)) {
1324                         failed = 1;
1325                         break;
1326                 }
1327         }
1328
1329         gdk_pixbuf_loader_close (loader, NULL);
1330
1331         if (!failed) pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
1332
1333         return pixbuf;
1334 }
1335
1336 /*
1337   Local Variables:
1338   mode:c++
1339   c-file-style:"stroustrup"
1340   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1341   indent-tabs-mode:nil
1342   fill-column:99
1343   End:
1344 */
1345 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :