backend/tiff/tiff-document.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
   2 /*
   3  * Copyright (C) 2005, Jonathan Blandford <jrb@gnome.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2, or (at your option)
   8  * any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 /* FIXME: Should probably buffer calls to libtiff with TIFFSetWarningHandler
  21  */
  22
  23 #include "config.h"
  24
  25 #include <config.h>
  26 #include <stdio.h>
  27 #include <glib.h>
  28 #include <glib/gi18n.h>
  29
  30 #include "tiffio.h"
  31 #include "tiff2ps.h"
  32 #include "tiff-document.h"
  33 #include "ev-document-misc.h"
  34 #include "ev-document-thumbnails.h"
  35 #include "ev-file-exporter.h"
  36 #include "ev-file-helpers.h"
  37
  38 struct _TiffDocumentClass
  39 {
  40   GObjectClass parent_class;
  41 };
  42
  43 struct _TiffDocument
  44 {
  45   GObject parent_instance;
  46
  47   TIFF *tiff;
  48   gint n_pages;
  49   TIFF2PSContext *ps_export_ctx;
  50
  51   gchar *uri;
  52 };
  53
  54 typedef struct _TiffDocumentClass TiffDocumentClass;
  55
  56 static void tiff_document_document_iface_init (EvDocumentIface *iface);
  57 static void tiff_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface);
  58 static void tiff_document_document_file_exporter_iface_init (EvFileExporterIface *iface);
  59
  60 EV_BACKEND_REGISTER_WITH_CODE (TiffDocument, tiff_document,
  61                          {
  62                            EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
  63                                                            tiff_document_document_thumbnails_iface_init);
  64                            EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_FILE_EXPORTER,
  65                                                            tiff_document_document_file_exporter_iface_init);
  66                          });
  67
  68 static TIFFErrorHandler orig_error_handler = NULL;
  69 static TIFFErrorHandler orig_warning_handler = NULL;
  70
  71 static void
  72 push_handlers (void)
  73 {
  74         orig_error_handler = TIFFSetErrorHandler (NULL);
  75         orig_warning_handler = TIFFSetWarningHandler (NULL);
  76 }
  77
  78 static void
  79 pop_handlers (void)
  80 {
  81         TIFFSetErrorHandler (orig_error_handler);
  82         TIFFSetWarningHandler (orig_warning_handler);
  83 }
  84
  85 static gboolean
  86 tiff_document_load (EvDocument  *document,
  87                     const char  *uri,
  88                     GError     **error)
  89 {
  90         TiffDocument *tiff_document = TIFF_DOCUMENT (document);
  91         gchar *filename;
  92         TIFF *tiff;
  93
  94         push_handlers ();
  95         filename = g_filename_from_uri (uri, NULL, error);
  96         if (!filename) {
  97                 pop_handlers ();
  98                 return FALSE;
  99         }
 100
 101         tiff = TIFFOpen (filename, "r");
 102         if (tiff) {
 103                 guint32 w, h;
 104
 105                 /* FIXME: unused data? why bother here */
 106                 TIFFGetField(tiff, TIFFTAG_IMAGEWIDTH, &w);
 107                 TIFFGetField(tiff, TIFFTAG_IMAGELENGTH, &h);
 108         }
 109
 110         if (!tiff) {
 111                 pop_handlers ();
 112                 return FALSE;
 113         }
 114
 115         tiff_document->tiff = tiff;
 116         g_free (tiff_document->uri);
 117         g_free (filename);
 118         tiff_document->uri = g_strdup (uri);
 119
 120         pop_handlers ();
 121         return TRUE;
 122 }
 123
 124 static gboolean
 125 tiff_document_save (EvDocument  *document,
 126                     const char  *uri,
 127                     GError     **error)
 128 {
 129         TiffDocument *tiff_document = TIFF_DOCUMENT (document);
 130
 131         return ev_xfer_uri_simple (tiff_document->uri, uri, error);
 132 }
 133
 134 static int
 135 tiff_document_get_n_pages (EvDocument  *document)
 136 {
 137         TiffDocument *tiff_document = TIFF_DOCUMENT (document);
 138
 139         g_return_val_if_fail (TIFF_IS_DOCUMENT (document), 0);
 140         g_return_val_if_fail (tiff_document->tiff != NULL, 0);
 141
 142         if (tiff_document->n_pages == -1) {
 143                 push_handlers ();
 144                 tiff_document->n_pages = 0;
 145
 146                 do {
 147                         tiff_document->n_pages ++;
 148                 }
 149                 while (TIFFReadDirectory (tiff_document->tiff));
 150                 pop_handlers ();
 151         }
 152
 153         return tiff_document->n_pages;
 154 }
 155
 156 static void
 157 tiff_document_get_resolution (TiffDocument *tiff_document,
 158                               gfloat       *x_res,
 159                               gfloat       *y_res)
 160 {
 161         gfloat x = 72.0, y = 72.0;
 162         gushort unit;
 163
 164         if (TIFFGetField (tiff_document->tiff, TIFFTAG_XRESOLUTION, &x) &&
 165             TIFFGetField (tiff_document->tiff, TIFFTAG_YRESOLUTION, &y)) {
 166                 if (TIFFGetFieldDefaulted (tiff_document->tiff, TIFFTAG_RESOLUTIONUNIT, &unit)) {
 167                         if (unit == RESUNIT_CENTIMETER) {
 168                                 x *= 2.54;
 169                                 y *= 2.54;
 170                         }
 171                 }
 172         }
 173
 174         *x_res = x;
 175         *y_res = y;
 176 }
 177
 178 static void
 179 tiff_document_get_page_size (EvDocument *document,
 180                              EvPage     *page,
 181                              double     *width,
 182                              double     *height)
 183 {
 184         guint32 w, h;
 185         gfloat x_res, y_res;
 186         TiffDocument *tiff_document = TIFF_DOCUMENT (document);
 187
 188         g_return_if_fail (TIFF_IS_DOCUMENT (document));
 189         g_return_if_fail (tiff_document->tiff != NULL);
 190
 191         push_handlers ();
 192         if (TIFFSetDirectory (tiff_document->tiff, page->index) != 1) {
 193                 pop_handlers ();
 194                 return;
 195         }
 196
 197         TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGEWIDTH, &w);
 198         TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGELENGTH, &h);
 199         tiff_document_get_resolution (tiff_document, &x_res, &y_res);
 200         h = h * (x_res / y_res);
 201
 202         *width = w;
 203         *height = h;
 204
 205         pop_handlers ();
 206 }
 207
 208 static cairo_surface_t *
 209 tiff_document_render (EvDocument      *document,
 210                       EvRenderContext *rc)
 211 {
 212         TiffDocument *tiff_document = TIFF_DOCUMENT (document);
 213         int width, height;
 214         float x_res, y_res;
 215         gint rowstride, bytes;
 216         guchar *pixels = NULL;
 217         guchar *p;
 218         int orientation;
 219         cairo_surface_t *surface;
 220         cairo_surface_t *rotated_surface;
 221         static const cairo_user_data_key_t key;
 222
 223         g_return_val_if_fail (TIFF_IS_DOCUMENT (document), NULL);
 224         g_return_val_if_fail (tiff_document->tiff != NULL, NULL);
 225
 226         push_handlers ();
 227         if (TIFFSetDirectory (tiff_document->tiff, rc->page->index) != 1) {
 228                 pop_handlers ();
 229                 return NULL;
 230         }
 231
 232         if (!TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGEWIDTH, &width)) {
 233                 pop_handlers ();
 234                 return NULL;
 235         }
 236
 237         if (! TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGELENGTH, &height)) {
 238                 pop_handlers ();
 239                 return NULL;
 240         }
 241
 242         if (! TIFFGetField (tiff_document->tiff, TIFFTAG_ORIENTATION, &orientation)) {
 243                 orientation = ORIENTATION_TOPLEFT;
 244         }
 245
 246         tiff_document_get_resolution (tiff_document, &x_res, &y_res);
 247
 248         pop_handlers ();
 249
 250         /* Sanity check the doc */
 251         if (width <= 0 || height <= 0)
 252                 return NULL;
 253
 254 #ifdef HAVE_CAIRO_FORMAT_STRIDE_FOR_WIDTH
 255         rowstride = cairo_format_stride_for_width (CAIRO_FORMAT_RGB24, width);
 256 #else
 257         rowstride = width * 4;
 258         if (rowstride / 4 != width)
 259                 /* overflow */
 260                 return NULL;
 261 #endif
 262
 263         bytes = height * rowstride;
 264         if (bytes / rowstride != height)
 265                 /* overflow */
 266                 return NULL;
 267
 268         pixels = g_try_malloc (bytes);
 269         if (!pixels)
 270                 return NULL;
 271
 272         surface = cairo_image_surface_create_for_data (pixels,
 273                                                        CAIRO_FORMAT_RGB24,
 274                                                        width, height,
 275                                                        rowstride);
 276         cairo_surface_set_user_data (surface, &key,
 277                                      pixels, (cairo_destroy_func_t)g_free);
 278
 279         TIFFReadRGBAImageOriented (tiff_document->tiff,
 280                                    width, height,
 281                                    (uint32 *)pixels,
 282                                    orientation, 1);
 283         pop_handlers ();
 284
 285         /* Convert the format returned by libtiff to
 286         * what cairo expects
 287         */
 288         p = pixels;
 289         while (p < pixels + bytes) {
 290                 uint32 pixel = *(uint32 *)p;
 291                 int r = TIFFGetR(pixel);
 292                 int g = TIFFGetG(pixel);
 293                 int b = TIFFGetB(pixel);
 294                 int a = TIFFGetA(pixel);
 295
 296                 *p++ = b;
 297                 *p++ = g;
 298                 *p++ = r;
 299                 *p++ = a;
 300         }
 301
 302         rotated_surface = ev_document_misc_surface_rotate_and_scale (surface,
 303                                                                      (width * rc->scale) + 0.5,
 304                                                                      (height * rc->scale * (x_res / y_res)) + 0.5,
 305                                                                      rc->rotation);
 306         cairo_surface_destroy (surface);
 307
 308         return rotated_surface;
 309 }
 310
 311 static GdkPixbuf *
 312 tiff_document_render_pixbuf (EvDocument      *document,
 313                              EvRenderContext *rc)
 314 {
 315         TiffDocument *tiff_document = TIFF_DOCUMENT (document);
 316         int width, height;
 317         float x_res, y_res;
 318         gint rowstride, bytes;
 319         guchar *pixels = NULL;
 320         GdkPixbuf *pixbuf;
 321         GdkPixbuf *scaled_pixbuf;
 322         GdkPixbuf *rotated_pixbuf;
 323
 324         push_handlers ();
 325         if (TIFFSetDirectory (tiff_document->tiff, rc->page->index) != 1) {
 326                 pop_handlers ();
 327                 return NULL;
 328         }
 329
 330         if (!TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGEWIDTH, &width)) {
 331                 pop_handlers ();
 332                 return NULL;
 333         }
 334
 335         if (! TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGELENGTH, &height)) {
 336                 pop_handlers ();
 337                 return NULL;
 338         }
 339
 340         tiff_document_get_resolution (tiff_document, &x_res, &y_res);
 341
 342         pop_handlers ();
 343
 344         /* Sanity check the doc */
 345         if (width <= 0 || height <= 0)
 346                 return NULL;
 347
 348         rowstride = width * 4;
 349         if (rowstride / 4 != width)
 350                 /* overflow */
 351                 return NULL;
 352
 353         bytes = height * rowstride;
 354         if (bytes / rowstride != height)
 355                 /* overflow */
 356                 return NULL;
 357
 358         pixels = g_try_malloc (bytes);
 359         if (!pixels)
 360                 return NULL;
 361
 362         pixbuf = gdk_pixbuf_new_from_data (pixels, GDK_COLORSPACE_RGB, TRUE, 8,
 363                                            width, height, rowstride,
 364                                            (GdkPixbufDestroyNotify) g_free, NULL);
 365         TIFFReadRGBAImageOriented (tiff_document->tiff,
 366                                    width, height,
 367                                    (uint32 *)pixels,
 368                                    ORIENTATION_TOPLEFT, 1);
 369         pop_handlers ();
 370
 371         scaled_pixbuf = gdk_pixbuf_scale_simple (pixbuf,
 372                                                  width * rc->scale,
 373                                                  height * rc->scale * (x_res / y_res),
 374                                                  GDK_INTERP_BILINEAR);
 375         g_object_unref (pixbuf);
 376
 377         rotated_pixbuf = gdk_pixbuf_rotate_simple (scaled_pixbuf, 360 - rc->rotation);
 378         g_object_unref (scaled_pixbuf);
 379
 380         return rotated_pixbuf;
 381 }
 382
 383 static void
 384 tiff_document_finalize (GObject *object)
 385 {
 386         TiffDocument *tiff_document = TIFF_DOCUMENT (object);
 387
 388         if (tiff_document->tiff)
 389                 TIFFClose (tiff_document->tiff);
 390         if (tiff_document->uri)
 391                 g_free (tiff_document->uri);
 392
 393         G_OBJECT_CLASS (tiff_document_parent_class)->finalize (object);
 394 }
 395
 396 static void
 397 tiff_document_class_init (TiffDocumentClass *klass)
 398 {
 399         GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 400
 401         gobject_class->finalize = tiff_document_finalize;
 402 }
 403
 404 static EvDocumentInfo *
 405 tiff_document_get_info (EvDocument *document)
 406 {
 407         EvDocumentInfo *info;
 408
 409         info = g_new0 (EvDocumentInfo, 1);
 410         info->fields_mask = 0;
 411
 412         return info;
 413 }
 414
 415 static void
 416 tiff_document_document_iface_init (EvDocumentIface *iface)
 417 {
 418         iface->load = tiff_document_load;
 419         iface->save = tiff_document_save;
 420         iface->get_n_pages = tiff_document_get_n_pages;
 421         iface->get_page_size = tiff_document_get_page_size;
 422         iface->render = tiff_document_render;
 423         iface->get_info = tiff_document_get_info;
 424 }
 425
 426 static GdkPixbuf *
 427 tiff_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
 428                                         EvRenderContext      *rc,
 429                                         gboolean              border)
 430 {
 431         GdkPixbuf *pixbuf;
 432
 433         pixbuf = tiff_document_render_pixbuf (EV_DOCUMENT (document), rc);
 434
 435         if (border) {
 436                 GdkPixbuf *tmp_pixbuf = pixbuf;
 437
 438                 pixbuf = ev_document_misc_get_thumbnail_frame (-1, -1, tmp_pixbuf);
 439                 g_object_unref (tmp_pixbuf);
 440         }
 441
 442         return pixbuf;
 443 }
 444
 445 static void
 446 tiff_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
 447                                          EvRenderContext      *rc,
 448                                          gint                 *width,
 449                                          gint                 *height)
 450 {
 451         gdouble page_width, page_height;
 452
 453         tiff_document_get_page_size (EV_DOCUMENT (document),
 454                                      rc->page,
 455                                      &page_width, &page_height);
 456
 457         if (rc->rotation == 90 || rc->rotation == 270) {
 458                 *width = (gint) (page_height * rc->scale);
 459                 *height = (gint) (page_width * rc->scale);
 460         } else {
 461                 *width = (gint) (page_width * rc->scale);
 462                 *height = (gint) (page_height * rc->scale);
 463         }
 464 }
 465
 466 static void
 467 tiff_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
 468 {
 469         iface->get_thumbnail = tiff_document_thumbnails_get_thumbnail;
 470         iface->get_dimensions = tiff_document_thumbnails_get_dimensions;
 471 }
 472
 473 /* postscript exporter implementation */
 474 static void
 475 tiff_document_file_exporter_begin (EvFileExporter        *exporter,
 476                                    EvFileExporterContext *fc)
 477 {
 478         TiffDocument *document = TIFF_DOCUMENT (exporter);
 479
 480         document->ps_export_ctx = tiff2ps_context_new(fc->filename);
 481 }
 482
 483 static void
 484 tiff_document_file_exporter_do_page (EvFileExporter *exporter, EvRenderContext *rc)
 485 {
 486         TiffDocument *document = TIFF_DOCUMENT (exporter);
 487
 488         if (document->ps_export_ctx == NULL)
 489                 return;
 490         if (TIFFSetDirectory (document->tiff, rc->page->index) != 1)
 491                 return;
 492         tiff2ps_process_page (document->ps_export_ctx, document->tiff,
 493                               0, 0, 0, 0, 0);
 494 }
 495
 496 static void
 497 tiff_document_file_exporter_end (EvFileExporter *exporter)
 498 {
 499         TiffDocument *document = TIFF_DOCUMENT (exporter);
 500
 501         if (document->ps_export_ctx == NULL)
 502                 return;
 503         tiff2ps_context_finalize(document->ps_export_ctx);
 504 }
 505
 506 static EvFileExporterCapabilities
 507 tiff_document_file_exporter_get_capabilities (EvFileExporter *exporter)
 508 {
 509         return  EV_FILE_EXPORTER_CAN_PAGE_SET |
 510                 EV_FILE_EXPORTER_CAN_COPIES |
 511                 EV_FILE_EXPORTER_CAN_COLLATE |
 512                 EV_FILE_EXPORTER_CAN_REVERSE |
 513                 EV_FILE_EXPORTER_CAN_GENERATE_PS;
 514 }
 515
 516 static void
 517 tiff_document_document_file_exporter_iface_init (EvFileExporterIface *iface)
 518 {
 519         iface->begin = tiff_document_file_exporter_begin;
 520         iface->do_page = tiff_document_file_exporter_do_page;
 521         iface->end = tiff_document_file_exporter_end;
 522         iface->get_capabilities = tiff_document_file_exporter_get_capabilities;
 523 }
 524
 525 static void
 526 tiff_document_init (TiffDocument *tiff_document)
 527 {
 528         tiff_document->n_pages = -1;
 529 }