1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
3 * Copyright (C) 2005, Jonathan Blandford <jrb@gnome.org>
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)
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.
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.
20 /* FIXME: Should probably buffer calls to libtiff with TIFFSetWarningHandler
28 #include "tiff-document.h"
29 #include "ev-document-misc.h"
30 #include "ev-document-thumbnails.h"
31 #include "ev-ps-exporter.h"
33 struct _TiffDocumentClass
35 GObjectClass parent_class;
40 GObject parent_instance;
44 TIFF2PSContext *ps_export_ctx;
47 typedef struct _TiffDocumentClass TiffDocumentClass;
49 static void tiff_document_document_iface_init (EvDocumentIface *iface);
50 static void tiff_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface);
51 static void tiff_document_document_ps_exporter_iface_init (EvPSExporterIface *iface);
53 G_DEFINE_TYPE_WITH_CODE (TiffDocument, tiff_document, G_TYPE_OBJECT,
54 { G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT,
55 tiff_document_document_iface_init);
56 G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
57 tiff_document_document_thumbnails_iface_init);
58 G_IMPLEMENT_INTERFACE (EV_TYPE_PS_EXPORTER,
59 tiff_document_document_ps_exporter_iface_init);
62 static TIFFErrorHandler orig_error_handler = NULL;
63 static TIFFErrorHandler orig_warning_handler = NULL;
68 orig_error_handler = TIFFSetErrorHandler (NULL);
69 orig_warning_handler = TIFFSetWarningHandler (NULL);
75 TIFFSetErrorHandler (orig_error_handler);
76 TIFFSetWarningHandler (orig_warning_handler);
80 tiff_document_load (EvDocument *document,
84 TiffDocument *tiff_document = TIFF_DOCUMENT (document);
89 /* FIXME: We could actually load uris */
90 filename = g_filename_from_uri (uri, NULL, error);
97 tiff = TIFFOpen (filename, "r");
101 /* FIXME: unused data? why bother here */
102 TIFFGetField(tiff, TIFFTAG_IMAGEWIDTH, &w);
103 TIFFGetField(tiff, TIFFTAG_IMAGELENGTH, &h);
110 tiff_document->tiff = tiff;
117 tiff_document_save (EvDocument *document,
125 tiff_document_get_n_pages (EvDocument *document)
127 TiffDocument *tiff_document = TIFF_DOCUMENT (document);
129 g_return_val_if_fail (TIFF_IS_DOCUMENT (document), 0);
130 g_return_val_if_fail (tiff_document->tiff != NULL, 0);
132 if (tiff_document->n_pages == -1)
135 tiff_document->n_pages = 0;
138 tiff_document->n_pages ++;
140 while (TIFFReadDirectory (tiff_document->tiff));
144 return tiff_document->n_pages;
148 tiff_document_get_page_size (EvDocument *document,
155 TiffDocument *tiff_document = TIFF_DOCUMENT (document);
157 g_return_if_fail (TIFF_IS_DOCUMENT (document));
158 g_return_if_fail (tiff_document->tiff != NULL);
161 if (TIFFSetDirectory (tiff_document->tiff, page) != 1)
167 TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGEWIDTH, &w);
168 TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGELENGTH, &h);
169 TIFFGetField (tiff_document->tiff, TIFFTAG_XRESOLUTION, &x_res);
170 TIFFGetField (tiff_document->tiff, TIFFTAG_YRESOLUTION, &y_res);
171 h = h * (x_res / y_res);
180 tiff_document_render_pixbuf (EvDocument *document,
183 TiffDocument *tiff_document = TIFF_DOCUMENT (document);
186 gint rowstride, bytes;
187 guchar *pixels = NULL;
189 GdkPixbuf *scaled_pixbuf;
190 GdkPixbuf *rotated_pixbuf;
192 g_return_val_if_fail (TIFF_IS_DOCUMENT (document), 0);
193 g_return_val_if_fail (tiff_document->tiff != NULL, 0);
196 if (TIFFSetDirectory (tiff_document->tiff, rc->page) != 1)
202 if (!TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGEWIDTH, &width))
208 if (! TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGELENGTH, &height))
214 if (!TIFFGetField (tiff_document->tiff, TIFFTAG_XRESOLUTION, &x_res))
220 if (! TIFFGetField (tiff_document->tiff, TIFFTAG_YRESOLUTION, &y_res))
228 /* Sanity check the doc */
229 if (width <= 0 || height <= 0)
232 rowstride = width * 4;
233 if (rowstride / 4 != width)
237 bytes = height * rowstride;
238 if (bytes / rowstride != height)
242 pixels = g_try_malloc (bytes);
246 pixbuf = gdk_pixbuf_new_from_data (pixels, GDK_COLORSPACE_RGB, TRUE, 8,
247 width, height, rowstride,
248 (GdkPixbufDestroyNotify) g_free, NULL);
250 pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, width, height);
251 TIFFReadRGBAImageOriented (tiff_document->tiff, width, height, (uint32 *)gdk_pixbuf_get_pixels (pixbuf), ORIENTATION_TOPLEFT, 1);
254 scaled_pixbuf = gdk_pixbuf_scale_simple (pixbuf,
256 height * rc->scale * (x_res/y_res),
257 GDK_INTERP_BILINEAR);
258 g_object_unref (pixbuf);
260 rotated_pixbuf = gdk_pixbuf_rotate_simple (scaled_pixbuf, 360 - rc->rotation);
261 g_object_unref (scaled_pixbuf);
263 return rotated_pixbuf;
267 tiff_document_finalize (GObject *object)
269 TiffDocument *tiff_document = TIFF_DOCUMENT (object);
271 TIFFClose (tiff_document->tiff);
273 G_OBJECT_CLASS (tiff_document_parent_class)->finalize (object);
277 tiff_document_class_init (TiffDocumentClass *klass)
279 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
281 gobject_class->finalize = tiff_document_finalize;
285 tiff_document_can_get_text (EvDocument *document)
290 static EvDocumentInfo *
291 tiff_document_get_info (EvDocument *document)
293 EvDocumentInfo *info;
295 info = g_new0 (EvDocumentInfo, 1);
296 info->fields_mask = 0;
302 tiff_document_document_iface_init (EvDocumentIface *iface)
304 iface->load = tiff_document_load;
305 iface->save = tiff_document_save;
306 iface->can_get_text = tiff_document_can_get_text;
307 iface->get_n_pages = tiff_document_get_n_pages;
308 iface->get_page_size = tiff_document_get_page_size;
309 iface->render_pixbuf = tiff_document_render_pixbuf;
310 iface->get_info = tiff_document_get_info;
314 tiff_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
324 tiff_document_get_page_size (EV_DOCUMENT (document),
328 rc = ev_render_context_new (rotation, page, size/w);
329 pixbuf = tiff_document_render_pixbuf (EV_DOCUMENT (document), rc);
330 g_object_unref (G_OBJECT (rc));
334 GdkPixbuf *tmp_pixbuf = pixbuf;
335 pixbuf = ev_document_misc_get_thumbnail_frame (-1, -1, 0, tmp_pixbuf);
336 g_object_unref (tmp_pixbuf);
343 tiff_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
345 gint suggested_width,
352 tiff_document_get_page_size (EV_DOCUMENT (document),
355 g_return_if_fail (w > 0);
357 *width = suggested_width;
358 *height = (gint) (suggested_width * page_ratio);
362 tiff_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
364 iface->get_thumbnail = tiff_document_thumbnails_get_thumbnail;
365 iface->get_dimensions = tiff_document_thumbnails_get_dimensions;
368 /* postscript exporter implementation */
371 tiff_document_ps_export_begin (EvPSExporter *exporter, const char *filename,
372 int first_page, int last_page,
373 double width, double height, gboolean duplex)
375 TiffDocument *document = TIFF_DOCUMENT (exporter);
377 document->ps_export_ctx = tiff2ps_context_new(filename);
381 tiff_document_ps_export_do_page (EvPSExporter *exporter, EvRenderContext *rc)
383 TiffDocument *document = TIFF_DOCUMENT (exporter);
385 if (document->ps_export_ctx == NULL)
387 if (TIFFSetDirectory (document->tiff, rc->page) != 1)
389 tiff2ps_process_page (document->ps_export_ctx, document->tiff,
394 tiff_document_ps_export_end (EvPSExporter *exporter)
396 TiffDocument *document = TIFF_DOCUMENT (exporter);
398 if (document->ps_export_ctx == NULL)
400 tiff2ps_context_finalize(document->ps_export_ctx);
404 tiff_document_document_ps_exporter_iface_init (EvPSExporterIface *iface)
406 iface->begin = tiff_document_ps_export_begin;
407 iface->do_page = tiff_document_ps_export_do_page;
408 iface->end = tiff_document_ps_export_end;
412 tiff_document_init (TiffDocument *tiff_document)
414 tiff_document->n_pages = -1;