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;
49 typedef struct _TiffDocumentClass TiffDocumentClass;
51 static void tiff_document_document_iface_init (EvDocumentIface *iface);
52 static void tiff_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface);
53 static void tiff_document_document_ps_exporter_iface_init (EvPSExporterIface *iface);
55 G_DEFINE_TYPE_WITH_CODE (TiffDocument, tiff_document, G_TYPE_OBJECT,
56 { G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT,
57 tiff_document_document_iface_init);
58 G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
59 tiff_document_document_thumbnails_iface_init);
60 G_IMPLEMENT_INTERFACE (EV_TYPE_PS_EXPORTER,
61 tiff_document_document_ps_exporter_iface_init);
64 static TIFFErrorHandler orig_error_handler = NULL;
65 static TIFFErrorHandler orig_warning_handler = NULL;
70 orig_error_handler = TIFFSetErrorHandler (NULL);
71 orig_warning_handler = TIFFSetWarningHandler (NULL);
77 TIFFSetErrorHandler (orig_error_handler);
78 TIFFSetWarningHandler (orig_warning_handler);
82 tiff_document_load (EvDocument *document,
86 TiffDocument *tiff_document = TIFF_DOCUMENT (document);
91 filename = g_filename_from_uri (uri, NULL, error);
98 tiff = TIFFOpen (filename, "r");
102 /* FIXME: unused data? why bother here */
103 TIFFGetField(tiff, TIFFTAG_IMAGEWIDTH, &w);
104 TIFFGetField(tiff, TIFFTAG_IMAGELENGTH, &h);
111 tiff_document->tiff = tiff;
112 g_free (tiff_document->uri);
114 tiff_document->uri = g_strdup (uri);
121 tiff_document_save (EvDocument *document,
125 TiffDocument *tiff_document = TIFF_DOCUMENT (document);
127 return ev_xfer_uri_simple (tiff_document->uri, uri, error);
131 tiff_document_get_n_pages (EvDocument *document)
133 TiffDocument *tiff_document = TIFF_DOCUMENT (document);
135 g_return_val_if_fail (TIFF_IS_DOCUMENT (document), 0);
136 g_return_val_if_fail (tiff_document->tiff != NULL, 0);
138 if (tiff_document->n_pages == -1)
141 tiff_document->n_pages = 0;
144 tiff_document->n_pages ++;
146 while (TIFFReadDirectory (tiff_document->tiff));
150 return tiff_document->n_pages;
154 tiff_document_get_page_size (EvDocument *document,
161 TiffDocument *tiff_document = TIFF_DOCUMENT (document);
163 g_return_if_fail (TIFF_IS_DOCUMENT (document));
164 g_return_if_fail (tiff_document->tiff != NULL);
167 if (TIFFSetDirectory (tiff_document->tiff, page) != 1)
173 TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGEWIDTH, &w);
174 TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGELENGTH, &h);
175 TIFFGetField (tiff_document->tiff, TIFFTAG_XRESOLUTION, &x_res);
176 TIFFGetField (tiff_document->tiff, TIFFTAG_YRESOLUTION, &y_res);
177 h = h * (x_res / y_res);
186 tiff_document_render_pixbuf (EvDocument *document,
189 TiffDocument *tiff_document = TIFF_DOCUMENT (document);
192 gint rowstride, bytes;
193 guchar *pixels = NULL;
195 GdkPixbuf *scaled_pixbuf;
196 GdkPixbuf *rotated_pixbuf;
198 g_return_val_if_fail (TIFF_IS_DOCUMENT (document), 0);
199 g_return_val_if_fail (tiff_document->tiff != NULL, 0);
202 if (TIFFSetDirectory (tiff_document->tiff, rc->page) != 1)
208 if (!TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGEWIDTH, &width))
214 if (! TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGELENGTH, &height))
220 if (!TIFFGetField (tiff_document->tiff, TIFFTAG_XRESOLUTION, &x_res))
226 if (! TIFFGetField (tiff_document->tiff, TIFFTAG_YRESOLUTION, &y_res))
234 /* Sanity check the doc */
235 if (width <= 0 || height <= 0)
238 rowstride = width * 4;
239 if (rowstride / 4 != width)
243 bytes = height * rowstride;
244 if (bytes / rowstride != height)
248 pixels = g_try_malloc (bytes);
252 pixbuf = gdk_pixbuf_new_from_data (pixels, GDK_COLORSPACE_RGB, TRUE, 8,
253 width, height, rowstride,
254 (GdkPixbufDestroyNotify) g_free, NULL);
256 pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, width, height);
257 TIFFReadRGBAImageOriented (tiff_document->tiff, width, height, (uint32 *)gdk_pixbuf_get_pixels (pixbuf), ORIENTATION_TOPLEFT, 1);
260 scaled_pixbuf = gdk_pixbuf_scale_simple (pixbuf,
262 height * rc->scale * (x_res/y_res),
263 GDK_INTERP_BILINEAR);
264 g_object_unref (pixbuf);
266 rotated_pixbuf = gdk_pixbuf_rotate_simple (scaled_pixbuf, 360 - rc->rotation);
267 g_object_unref (scaled_pixbuf);
269 return rotated_pixbuf;
273 tiff_document_finalize (GObject *object)
275 TiffDocument *tiff_document = TIFF_DOCUMENT (object);
277 TIFFClose (tiff_document->tiff);
278 g_free (tiff_document->uri);
280 G_OBJECT_CLASS (tiff_document_parent_class)->finalize (object);
284 tiff_document_class_init (TiffDocumentClass *klass)
286 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
288 gobject_class->finalize = tiff_document_finalize;
292 tiff_document_can_get_text (EvDocument *document)
297 static EvDocumentInfo *
298 tiff_document_get_info (EvDocument *document)
300 EvDocumentInfo *info;
302 info = g_new0 (EvDocumentInfo, 1);
303 info->fields_mask = 0;
309 tiff_document_document_iface_init (EvDocumentIface *iface)
311 iface->load = tiff_document_load;
312 iface->save = tiff_document_save;
313 iface->can_get_text = tiff_document_can_get_text;
314 iface->get_n_pages = tiff_document_get_n_pages;
315 iface->get_page_size = tiff_document_get_page_size;
316 iface->render_pixbuf = tiff_document_render_pixbuf;
317 iface->get_info = tiff_document_get_info;
321 tiff_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
331 tiff_document_get_page_size (EV_DOCUMENT (document),
335 rc = ev_render_context_new (rotation, page, size/w);
336 pixbuf = tiff_document_render_pixbuf (EV_DOCUMENT (document), rc);
337 g_object_unref (G_OBJECT (rc));
341 GdkPixbuf *tmp_pixbuf = pixbuf;
342 pixbuf = ev_document_misc_get_thumbnail_frame (-1, -1, 0, tmp_pixbuf);
343 g_object_unref (tmp_pixbuf);
350 tiff_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
352 gint suggested_width,
359 tiff_document_get_page_size (EV_DOCUMENT (document),
362 g_return_if_fail (w > 0);
364 *width = suggested_width;
365 *height = (gint) (suggested_width * page_ratio);
369 tiff_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
371 iface->get_thumbnail = tiff_document_thumbnails_get_thumbnail;
372 iface->get_dimensions = tiff_document_thumbnails_get_dimensions;
375 /* postscript exporter implementation */
378 tiff_document_ps_export_begin (EvPSExporter *exporter, const char *filename,
379 int first_page, int last_page,
380 double width, double height, gboolean duplex)
382 TiffDocument *document = TIFF_DOCUMENT (exporter);
384 document->ps_export_ctx = tiff2ps_context_new(filename);
388 tiff_document_ps_export_do_page (EvPSExporter *exporter, EvRenderContext *rc)
390 TiffDocument *document = TIFF_DOCUMENT (exporter);
392 if (document->ps_export_ctx == NULL)
394 if (TIFFSetDirectory (document->tiff, rc->page) != 1)
396 tiff2ps_process_page (document->ps_export_ctx, document->tiff,
401 tiff_document_ps_export_end (EvPSExporter *exporter)
403 TiffDocument *document = TIFF_DOCUMENT (exporter);
405 if (document->ps_export_ctx == NULL)
407 tiff2ps_context_finalize(document->ps_export_ctx);
411 tiff_document_document_ps_exporter_iface_init (EvPSExporterIface *iface)
413 iface->begin = tiff_document_ps_export_begin;
414 iface->do_page = tiff_document_ps_export_do_page;
415 iface->end = tiff_document_ps_export_end;
419 tiff_document_init (TiffDocument *tiff_document)
421 tiff_document->n_pages = -1;