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                            G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
  63                                                   tiff_document_document_thumbnails_iface_init);
  64                            G_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                              int           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) != 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         cairo_surface_t *surface;
 219         cairo_surface_t *rotated_surface;
 220         static const cairo_user_data_key_t key;
 221
 222         g_return_val_if_fail (TIFF_IS_DOCUMENT (document), NULL);
 223         g_return_val_if_fail (tiff_document->tiff != NULL, NULL);
 224
 225         push_handlers ();
 226         if (TIFFSetDirectory (tiff_document->tiff, rc->page) != 1) {
 227                 pop_handlers ();
 228                 return NULL;
 229         }
 230
 231         if (!TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGEWIDTH, &width)) {
 232                 pop_handlers ();
 233                 return NULL;
 234         }
 235
 236         if (! TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGELENGTH, &height)) {
 237                 pop_handlers ();
 238                 return NULL;
 239         }
 240
 241         tiff_document_get_resolution (tiff_document, &x_res, &y_res);
 242
 243         pop_handlers ();
 244
 245         /* Sanity check the doc */
 246         if (width <= 0 || height <= 0)
 247                 return NULL;
 248
 249         rowstride = width * 4;
 250         if (rowstride / 4 != width)
 251                 /* overflow */
 252                 return NULL;
 253
 254         bytes = height * rowstride;
 255         if (bytes / rowstride != height)
 256                 /* overflow */
 257                 return NULL;
 258
 259         pixels = g_try_malloc (bytes);
 260         if (!pixels)
 261                 return NULL;
 262
 263         surface = cairo_image_surface_create_for_data (pixels,
 264                                                        CAIRO_FORMAT_RGB24,
 265                                                        width, height,
 266                                                        rowstride);
 267         cairo_surface_set_user_data (surface, &key,
 268                                      pixels, (cairo_destroy_func_t)g_free);
 269
 270         TIFFReadRGBAImageOriented (tiff_document->tiff,
 271                                    width, height,
 272                                    (uint32 *)pixels,
 273                                    ORIENTATION_TOPLEFT, 1);
 274         pop_handlers ();
 275
 276         /* Convert the format returned by libtiff to
 277         * what cairo expects
 278         */
 279         p = pixels;
 280         while (p < pixels + bytes) {
 281                 uint32 pixel = *(uint32 *)p;
 282                 int r = TIFFGetR(pixel);
 283                 int g = TIFFGetG(pixel);
 284                 int b = TIFFGetB(pixel);
 285                 int a = TIFFGetA(pixel);
 286
 287                 *p++ = b;
 288                 *p++ = g;
 289                 *p++ = r;
 290                 *p++ = a;
 291         }
 292
 293         rotated_surface = ev_document_misc_surface_rotate_and_scale (surface,
 294                                                                      (width * rc->scale) + 0.5,
 295                                                                      (height * rc->scale * (x_res / y_res)) + 0.5,
 296                                                                      rc->rotation);
 297         cairo_surface_destroy (surface);
 298
 299         return rotated_surface;
 300 }
 301
 302 static GdkPixbuf *
 303 tiff_document_render_pixbuf (EvDocument      *document,
 304                              EvRenderContext *rc)
 305 {
 306         TiffDocument *tiff_document = TIFF_DOCUMENT (document);
 307         int width, height;
 308         float x_res, y_res;
 309         gint rowstride, bytes;
 310         guchar *pixels = NULL;
 311         GdkPixbuf *pixbuf;
 312         GdkPixbuf *scaled_pixbuf;
 313         GdkPixbuf *rotated_pixbuf;
 314
 315         push_handlers ();
 316         if (TIFFSetDirectory (tiff_document->tiff, rc->page) != 1) {
 317                 pop_handlers ();
 318                 return NULL;
 319         }
 320
 321         if (!TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGEWIDTH, &width)) {
 322                 pop_handlers ();
 323                 return NULL;
 324         }
 325
 326         if (! TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGELENGTH, &height)) {
 327                 pop_handlers ();
 328                 return NULL;
 329         }
 330
 331         tiff_document_get_resolution (tiff_document, &x_res, &y_res);
 332
 333         pop_handlers ();
 334
 335         /* Sanity check the doc */
 336         if (width <= 0 || height <= 0)
 337                 return NULL;
 338
 339         rowstride = width * 4;
 340         if (rowstride / 4 != width)
 341                 /* overflow */
 342                 return NULL;
 343
 344         bytes = height * rowstride;
 345         if (bytes / rowstride != height)
 346                 /* overflow */
 347                 return NULL;
 348
 349         pixels = g_try_malloc (bytes);
 350         if (!pixels)
 351                 return NULL;
 352
 353         pixbuf = gdk_pixbuf_new_from_data (pixels, GDK_COLORSPACE_RGB, TRUE, 8,
 354                                            width, height, rowstride,
 355                                            (GdkPixbufDestroyNotify) g_free, NULL);
 356         TIFFReadRGBAImageOriented (tiff_document->tiff,
 357                                    width, height,
 358                                    (uint32 *)pixels,
 359                                    ORIENTATION_TOPLEFT, 1);
 360         pop_handlers ();
 361
 362         scaled_pixbuf = gdk_pixbuf_scale_simple (pixbuf,
 363                                                  width * rc->scale,
 364                                                  height * rc->scale * (x_res / y_res),
 365                                                  GDK_INTERP_BILINEAR);
 366         g_object_unref (pixbuf);
 367
 368         rotated_pixbuf = gdk_pixbuf_rotate_simple (scaled_pixbuf, 360 - rc->rotation);
 369         g_object_unref (scaled_pixbuf);
 370
 371         return rotated_pixbuf;
 372 }
 373
 374 static void
 375 tiff_document_finalize (GObject *object)
 376 {
 377         TiffDocument *tiff_document = TIFF_DOCUMENT (object);
 378
 379         if (tiff_document->tiff)
 380                 TIFFClose (tiff_document->tiff);
 381         if (tiff_document->uri)
 382                 g_free (tiff_document->uri);
 383
 384         G_OBJECT_CLASS (tiff_document_parent_class)->finalize (object);
 385 }
 386
 387 static void
 388 tiff_document_class_init (TiffDocumentClass *klass)
 389 {
 390         GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 391
 392         gobject_class->finalize = tiff_document_finalize;
 393 }
 394
 395 static EvDocumentInfo *
 396 tiff_document_get_info (EvDocument *document)
 397 {
 398         EvDocumentInfo *info;
 399
 400         info = g_new0 (EvDocumentInfo, 1);
 401         info->fields_mask = 0;
 402
 403         return info;
 404 }
 405
 406 static void
 407 tiff_document_document_iface_init (EvDocumentIface *iface)
 408 {
 409         iface->load = tiff_document_load;
 410         iface->save = tiff_document_save;
 411         iface->get_n_pages = tiff_document_get_n_pages;
 412         iface->get_page_size = tiff_document_get_page_size;
 413         iface->render = tiff_document_render;
 414         iface->get_info = tiff_document_get_info;
 415 }
 416
 417 static GdkPixbuf *
 418 tiff_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
 419                                         EvRenderContext      *rc,
 420                                         gboolean              border)
 421 {
 422         GdkPixbuf *pixbuf;
 423
 424         pixbuf = tiff_document_render_pixbuf (EV_DOCUMENT (document), rc);
 425
 426         if (border) {
 427                 GdkPixbuf *tmp_pixbuf = pixbuf;
 428
 429                 pixbuf = ev_document_misc_get_thumbnail_frame (-1, -1, tmp_pixbuf);
 430                 g_object_unref (tmp_pixbuf);
 431         }
 432
 433         return pixbuf;
 434 }
 435
 436 static void
 437 tiff_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
 438                                          EvRenderContext      *rc,
 439                                          gint                 *width,
 440                                          gint                 *height)
 441 {
 442         gdouble page_width, page_height;
 443
 444         tiff_document_get_page_size (EV_DOCUMENT (document),
 445                                      rc->page,
 446                                      &page_width, &page_height);
 447
 448         if (rc->rotation == 90 || rc->rotation == 270) {
 449                 *width = (gint) (page_height * rc->scale);
 450                 *height = (gint) (page_width * rc->scale);
 451         } else {
 452                 *width = (gint) (page_width * rc->scale);
 453                 *height = (gint) (page_height * rc->scale);
 454         }
 455 }
 456
 457 static void
 458 tiff_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
 459 {
 460         iface->get_thumbnail = tiff_document_thumbnails_get_thumbnail;
 461         iface->get_dimensions = tiff_document_thumbnails_get_dimensions;
 462 }
 463
 464 /* postscript exporter implementation */
 465 static void
 466 tiff_document_file_exporter_begin (EvFileExporter        *exporter,
 467                                    EvFileExporterContext *fc)
 468 {
 469         TiffDocument *document = TIFF_DOCUMENT (exporter);
 470
 471         document->ps_export_ctx = tiff2ps_context_new(fc->filename);
 472 }
 473
 474 static void
 475 tiff_document_file_exporter_do_page (EvFileExporter *exporter, EvRenderContext *rc)
 476 {
 477         TiffDocument *document = TIFF_DOCUMENT (exporter);
 478
 479         if (document->ps_export_ctx == NULL)
 480                 return;
 481         if (TIFFSetDirectory (document->tiff, rc->page) != 1)
 482                 return;
 483         tiff2ps_process_page (document->ps_export_ctx, document->tiff,
 484                               0, 0, 0, 0, 0);
 485 }
 486
 487 static void
 488 tiff_document_file_exporter_end (EvFileExporter *exporter)
 489 {
 490         TiffDocument *document = TIFF_DOCUMENT (exporter);
 491
 492         if (document->ps_export_ctx == NULL)
 493                 return;
 494         tiff2ps_context_finalize(document->ps_export_ctx);
 495 }
 496
 497 static EvFileExporterCapabilities
 498 tiff_document_file_exporter_get_capabilities (EvFileExporter *exporter)
 499 {
 500         return  EV_FILE_EXPORTER_CAN_PAGE_SET |
 501                 EV_FILE_EXPORTER_CAN_COPIES |
 502                 EV_FILE_EXPORTER_CAN_COLLATE |
 503                 EV_FILE_EXPORTER_CAN_REVERSE |
 504                 EV_FILE_EXPORTER_CAN_GENERATE_PS;
 505 }
 506
 507 static void
 508 tiff_document_document_file_exporter_iface_init (EvFileExporterIface *iface)
 509 {
 510         iface->begin = tiff_document_file_exporter_begin;
 511         iface->do_page = tiff_document_file_exporter_do_page;
 512         iface->end = tiff_document_file_exporter_end;
 513         iface->get_capabilities = tiff_document_file_exporter_get_capabilities;
 514 }
 515
 516 static void
 517 tiff_document_init (TiffDocument *tiff_document)
 518 {
 519         tiff_document->n_pages = -1;
 520 }