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         GdkPixbuf *pixbuf;
 219         GdkPixbuf *scaled_pixbuf;
 220         GdkPixbuf *rotated_pixbuf;
 221         cairo_surface_t *surface;
 222         cairo_surface_t *rotated_surface;
 223         static const cairo_user_data_key_t key;
 224
 225         g_return_val_if_fail (TIFF_IS_DOCUMENT (document), NULL);
 226         g_return_val_if_fail (tiff_document->tiff != NULL, NULL);
 227
 228         push_handlers ();
 229         if (TIFFSetDirectory (tiff_document->tiff, rc->page) != 1) {
 230                 pop_handlers ();
 231                 return NULL;
 232         }
 233
 234         if (!TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGEWIDTH, &width)) {
 235                 pop_handlers ();
 236                 return NULL;
 237         }
 238
 239         if (! TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGELENGTH, &height)) {
 240                 pop_handlers ();
 241                 return NULL;
 242         }
 243
 244         tiff_document_get_resolution (tiff_document, &x_res, &y_res);
 245
 246         pop_handlers ();
 247
 248         /* Sanity check the doc */
 249         if (width <= 0 || height <= 0)
 250                 return NULL;
 251
 252         rowstride = width * 4;
 253         if (rowstride / 4 != width)
 254                 /* overflow */
 255                 return NULL;
 256
 257         bytes = height * rowstride;
 258         if (bytes / rowstride != height)
 259                 /* overflow */
 260                 return NULL;
 261
 262         pixels = g_try_malloc (bytes);
 263         if (!pixels)
 264                 return NULL;
 265
 266         surface = cairo_image_surface_create_for_data (pixels,
 267                                                        CAIRO_FORMAT_RGB24,
 268                                                        width, height,
 269                                                        rowstride);
 270         cairo_surface_set_user_data (surface, &key,
 271                                      pixels, (cairo_destroy_func_t)g_free);
 272
 273         TIFFReadRGBAImageOriented (tiff_document->tiff,
 274                                    width, height,
 275                                    (uint32 *)pixels,
 276                                    ORIENTATION_TOPLEFT, 1);
 277         pop_handlers ();
 278
 279         /* Convert the format returned by libtiff to
 280         * what cairo expects
 281         */
 282         p = pixels;
 283         while (p < pixels + bytes) {
 284                 uint32 pixel = *(uint32 *)p;
 285                 int r = TIFFGetR(pixel);
 286                 int g = TIFFGetG(pixel);
 287                 int b = TIFFGetB(pixel);
 288                 int a = TIFFGetA(pixel);
 289
 290                 *p++ = b;
 291                 *p++ = g;
 292                 *p++ = r;
 293                 *p++ = a;
 294         }
 295
 296         rotated_surface = ev_document_misc_surface_rotate_and_scale (surface,
 297                                                                      (width * rc->scale) + 0.5,
 298                                                                      (height * rc->scale * (x_res / y_res)) + 0.5,
 299                                                                      rc->rotation);
 300         cairo_surface_destroy (surface);
 301
 302         return rotated_surface;
 303 }
 304
 305 static GdkPixbuf *
 306 tiff_document_render_pixbuf (EvDocument      *document,
 307                              EvRenderContext *rc)
 308 {
 309         TiffDocument *tiff_document = TIFF_DOCUMENT (document);
 310         int width, height;
 311         float x_res, y_res;
 312         gint rowstride, bytes;
 313         guchar *pixels = NULL;
 314         GdkPixbuf *pixbuf;
 315         GdkPixbuf *scaled_pixbuf;
 316         GdkPixbuf *rotated_pixbuf;
 317
 318         push_handlers ();
 319         if (TIFFSetDirectory (tiff_document->tiff, rc->page) != 1) {
 320                 pop_handlers ();
 321                 return NULL;
 322         }
 323
 324         if (!TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGEWIDTH, &width)) {
 325                 pop_handlers ();
 326                 return NULL;
 327         }
 328
 329         if (! TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGELENGTH, &height)) {
 330                 pop_handlers ();
 331                 return NULL;
 332         }
 333
 334         tiff_document_get_resolution (tiff_document, &x_res, &y_res);
 335
 336         pop_handlers ();
 337
 338         /* Sanity check the doc */
 339         if (width <= 0 || height <= 0)
 340                 return NULL;
 341
 342         rowstride = width * 4;
 343         if (rowstride / 4 != width)
 344                 /* overflow */
 345                 return NULL;
 346
 347         bytes = height * rowstride;
 348         if (bytes / rowstride != height)
 349                 /* overflow */
 350                 return NULL;
 351
 352         pixels = g_try_malloc (bytes);
 353         if (!pixels)
 354                 return NULL;
 355
 356         pixbuf = gdk_pixbuf_new_from_data (pixels, GDK_COLORSPACE_RGB, TRUE, 8,
 357                                            width, height, rowstride,
 358                                            (GdkPixbufDestroyNotify) g_free, NULL);
 359         TIFFReadRGBAImageOriented (tiff_document->tiff,
 360                                    width, height,
 361                                    (uint32 *)pixels,
 362                                    ORIENTATION_TOPLEFT, 1);
 363         pop_handlers ();
 364
 365         scaled_pixbuf = gdk_pixbuf_scale_simple (pixbuf,
 366                                                  width * rc->scale,
 367                                                  height * rc->scale * (x_res / y_res),
 368                                                  GDK_INTERP_BILINEAR);
 369         g_object_unref (pixbuf);
 370
 371         rotated_pixbuf = gdk_pixbuf_rotate_simple (scaled_pixbuf, 360 - rc->rotation);
 372         g_object_unref (scaled_pixbuf);
 373
 374         return rotated_pixbuf;
 375 }
 376
 377 static void
 378 tiff_document_finalize (GObject *object)
 379 {
 380         TiffDocument *tiff_document = TIFF_DOCUMENT (object);
 381
 382         if (tiff_document->tiff)
 383                 TIFFClose (tiff_document->tiff);
 384         if (tiff_document->uri)
 385                 g_free (tiff_document->uri);
 386
 387         G_OBJECT_CLASS (tiff_document_parent_class)->finalize (object);
 388 }
 389
 390 static void
 391 tiff_document_class_init (TiffDocumentClass *klass)
 392 {
 393         GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 394
 395         gobject_class->finalize = tiff_document_finalize;
 396 }
 397
 398 static EvDocumentInfo *
 399 tiff_document_get_info (EvDocument *document)
 400 {
 401         EvDocumentInfo *info;
 402
 403         info = g_new0 (EvDocumentInfo, 1);
 404         info->fields_mask = 0;
 405
 406         return info;
 407 }
 408
 409 static void
 410 tiff_document_document_iface_init (EvDocumentIface *iface)
 411 {
 412         iface->load = tiff_document_load;
 413         iface->save = tiff_document_save;
 414         iface->get_n_pages = tiff_document_get_n_pages;
 415         iface->get_page_size = tiff_document_get_page_size;
 416         iface->render = tiff_document_render;
 417         iface->get_info = tiff_document_get_info;
 418 }
 419
 420 static GdkPixbuf *
 421 tiff_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
 422                                         EvRenderContext      *rc,
 423                                         gboolean              border)
 424 {
 425         GdkPixbuf *pixbuf;
 426
 427         pixbuf = tiff_document_render_pixbuf (EV_DOCUMENT (document), rc);
 428
 429         if (border) {
 430                 GdkPixbuf *tmp_pixbuf = pixbuf;
 431
 432                 pixbuf = ev_document_misc_get_thumbnail_frame (-1, -1, tmp_pixbuf);
 433                 g_object_unref (tmp_pixbuf);
 434         }
 435
 436         return pixbuf;
 437 }
 438
 439 static void
 440 tiff_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
 441                                          EvRenderContext      *rc,
 442                                          gint                 *width,
 443                                          gint                 *height)
 444 {
 445         gdouble page_width, page_height;
 446
 447         tiff_document_get_page_size (EV_DOCUMENT (document),
 448                                      rc->page,
 449                                      &page_width, &page_height);
 450
 451         if (rc->rotation == 90 || rc->rotation == 270) {
 452                 *width = (gint) (page_height * rc->scale);
 453                 *height = (gint) (page_width * rc->scale);
 454         } else {
 455                 *width = (gint) (page_width * rc->scale);
 456                 *height = (gint) (page_height * rc->scale);
 457         }
 458 }
 459
 460 static void
 461 tiff_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
 462 {
 463         iface->get_thumbnail = tiff_document_thumbnails_get_thumbnail;
 464         iface->get_dimensions = tiff_document_thumbnails_get_dimensions;
 465 }
 466
 467 /* postscript exporter implementation */
 468 static void
 469 tiff_document_file_exporter_begin (EvFileExporter        *exporter,
 470                                    EvFileExporterContext *fc)
 471 {
 472         TiffDocument *document = TIFF_DOCUMENT (exporter);
 473
 474         document->ps_export_ctx = tiff2ps_context_new(fc->filename);
 475 }
 476
 477 static void
 478 tiff_document_file_exporter_do_page (EvFileExporter *exporter, EvRenderContext *rc)
 479 {
 480         TiffDocument *document = TIFF_DOCUMENT (exporter);
 481
 482         if (document->ps_export_ctx == NULL)
 483                 return;
 484         if (TIFFSetDirectory (document->tiff, rc->page) != 1)
 485                 return;
 486         tiff2ps_process_page (document->ps_export_ctx, document->tiff,
 487                               0, 0, 0, 0, 0);
 488 }
 489
 490 static void
 491 tiff_document_file_exporter_end (EvFileExporter *exporter)
 492 {
 493         TiffDocument *document = TIFF_DOCUMENT (exporter);
 494
 495         if (document->ps_export_ctx == NULL)
 496                 return;
 497         tiff2ps_context_finalize(document->ps_export_ctx);
 498 }
 499
 500 static EvFileExporterCapabilities
 501 tiff_document_file_exporter_get_capabilities (EvFileExporter *exporter)
 502 {
 503         return  EV_FILE_EXPORTER_CAN_PAGE_SET |
 504                 EV_FILE_EXPORTER_CAN_COPIES |
 505                 EV_FILE_EXPORTER_CAN_COLLATE |
 506                 EV_FILE_EXPORTER_CAN_REVERSE |
 507                 EV_FILE_EXPORTER_CAN_GENERATE_PS;
 508 }
 509
 510 static void
 511 tiff_document_document_file_exporter_iface_init (EvFileExporterIface *iface)
 512 {
 513         iface->begin = tiff_document_file_exporter_begin;
 514         iface->do_page = tiff_document_file_exporter_do_page;
 515         iface->end = tiff_document_file_exporter_end;
 516         iface->get_capabilities = tiff_document_file_exporter_get_capabilities;
 517 }
 518
 519 static void
 520 tiff_document_init (TiffDocument *tiff_document)
 521 {
 522         tiff_document->n_pages = -1;
 523 }