-
-/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
-/*
- * Copyright (C) 2005, Jonathan Blandford <jrb@gnome.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-/* FIXME: Shoudl probably buffer calls to libtiff with TIFFSetWarningHandler
- */
-#include "tiffio.h"
-#include "tiff-document.h"
-#include "ev-document-thumbnails.h"
-#include "ev-document-misc.h"
-
-struct _TiffDocumentClass
-{
- GObjectClass parent_class;
-};
-
-struct _TiffDocument
-{
- GObject parent_instance;
-
- TIFF *tiff;
- gint n_pages;
-};
-
-typedef struct _TiffDocumentClass TiffDocumentClass;
-
-static void tiff_document_document_iface_init (EvDocumentIface *iface);
-static void tiff_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface);
-
-G_DEFINE_TYPE_WITH_CODE (TiffDocument, tiff_document, G_TYPE_OBJECT,
- { G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT,
- tiff_document_document_iface_init);
- G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
- tiff_document_document_thumbnails_iface_init);
- });
-
-static TIFFErrorHandler orig_error_handler = NULL;
-static TIFFErrorHandler orig_warning_handler = NULL;
-
-static void
-push_handlers (void)
-{
- orig_error_handler = TIFFSetErrorHandler (NULL);
- orig_warning_handler = TIFFSetWarningHandler (NULL);
-}
-
-static void
-pop_handlers (void)
-{
- TIFFSetErrorHandler (orig_error_handler);
- TIFFSetWarningHandler (orig_warning_handler);
-}
-
-static gboolean
-tiff_document_load (EvDocument *document,
- const char *uri,
- GError **error)
-{
- TiffDocument *tiff_document = TIFF_DOCUMENT (document);
- gchar *filename;
- TIFF *tiff;
-
- push_handlers ();
- /* FIXME: We could actually load uris */
- filename = g_filename_from_uri (uri, NULL, error);
- if (!filename)
- {
- pop_handlers ();
- return FALSE;
- }
-
- tiff = TIFFOpen (filename, "r");
- if (tiff)
- {
- guint32 w, h;
-
- TIFFGetField(tiff, TIFFTAG_IMAGEWIDTH, &w);
- TIFFGetField(tiff, TIFFTAG_IMAGELENGTH, &h);
- }
- if (!tiff)
- {
- pop_handlers ();
- return FALSE;
- }
- tiff_document->tiff = tiff;
-
- pop_handlers ();
- return TRUE;
-}
-
-static gboolean
-tiff_document_save (EvDocument *document,
- const char *uri,
- GError **error)
-{
- return FALSE;
-}
-
-static int
-tiff_document_get_n_pages (EvDocument *document)
-{
- TiffDocument *tiff_document = TIFF_DOCUMENT (document);
-
- g_return_val_if_fail (TIFF_IS_DOCUMENT (document), 0);
- g_return_val_if_fail (tiff_document->tiff != NULL, 0);
-
- if (tiff_document->n_pages == -1)
- {
- push_handlers ();
- tiff_document->n_pages = 0;
- do
- {
- tiff_document->n_pages ++;
- }
- while (TIFFReadDirectory (tiff_document->tiff));
- pop_handlers ();
- }
-
- return tiff_document->n_pages;
-}
-
-static void
-tiff_document_get_page_size (EvDocument *document,
- int page,
- double *width,
- double *height)
-{
- guint32 w, h;
- TiffDocument *tiff_document = TIFF_DOCUMENT (document);
-
- g_return_if_fail (TIFF_IS_DOCUMENT (document));
- g_return_if_fail (tiff_document->tiff != NULL);
-
- push_handlers ();
- if (TIFFSetDirectory (tiff_document->tiff, page) != 1)
- {
- pop_handlers ();
- return;
- }
-
- TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGEWIDTH, &w);
- TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGELENGTH, &h);
-
- *width = w;
- *height = h;
- pop_handlers ();
-}
-
-static GdkPixbuf *
-tiff_document_render_pixbuf (EvDocument *document, int page, double scale)
-{
- TiffDocument *tiff_document = TIFF_DOCUMENT (document);
- int width, height;
- GdkPixbuf *pixbuf;
- GdkPixbuf *scaled_pixbuf;
-
- g_return_val_if_fail (TIFF_IS_DOCUMENT (document), 0);
- g_return_val_if_fail (tiff_document->tiff != NULL, 0);
-
- push_handlers ();
- if (TIFFSetDirectory (tiff_document->tiff, page) != 1)
- {
- pop_handlers ();
- return NULL;
- }
-
- TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGEWIDTH, &width);
- TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGELENGTH, &height);
-
- pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, width, height);
- TIFFReadRGBAImageOriented (tiff_document->tiff, width, height, (uint32 *)gdk_pixbuf_get_pixels (pixbuf), ORIENTATION_TOPLEFT, 1);
- pop_handlers ();
-
- scaled_pixbuf = gdk_pixbuf_scale_simple (pixbuf,
- width * scale,
- height * scale,
- GDK_INTERP_BILINEAR);
- g_object_unref (pixbuf);
-
- return scaled_pixbuf;
-}
-
-static void
-tiff_document_finalize (GObject *object)
-{
- TiffDocument *tiff_document = TIFF_DOCUMENT (object);
-
- TIFFClose (tiff_document->tiff);
-
- G_OBJECT_CLASS (tiff_document_parent_class)->finalize (object);
-}
-
-static void
-tiff_document_class_init (TiffDocumentClass *klass)
-{
- GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
-
- gobject_class->finalize = tiff_document_finalize;
-}
-
-static gboolean
-tiff_document_can_get_text (EvDocument *document)
-{
- return FALSE;
-}
-
-static EvDocumentInfo *
-tiff_document_get_info (EvDocument *document)
-{
- EvDocumentInfo *info;
-
- info = g_new0 (EvDocumentInfo, 1);
- info->fields_mask = 0;
-
- return info;
-}
-
-static void
-tiff_document_document_iface_init (EvDocumentIface *iface)
-{
- iface->load = tiff_document_load;
- iface->save = tiff_document_save;
- iface->can_get_text = tiff_document_can_get_text;
- iface->get_n_pages = tiff_document_get_n_pages;
- iface->get_page_size = tiff_document_get_page_size;
- iface->render_pixbuf = tiff_document_render_pixbuf;
- iface->get_info = tiff_document_get_info;
-}
-
-static GdkPixbuf *
-tiff_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
- gint page,
- gint size,
- gboolean border)
-{
- GdkPixbuf *pixbuf;
- gdouble w, h;
-
- tiff_document_get_page_size (EV_DOCUMENT (document),
- page,
- &w, &h);
-
- pixbuf = tiff_document_render_pixbuf (EV_DOCUMENT (document),
- page,
- size/w);
-
- if (border)
- {
- GdkPixbuf *tmp_pixbuf = pixbuf;
- pixbuf = ev_document_misc_get_thumbnail_frame (-1, -1, tmp_pixbuf);
- g_object_unref (tmp_pixbuf);
- }
-
- return pixbuf;
-}
-
-static void
-tiff_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
- gint page,
- gint suggested_width,
- gint *width,
- gint *height)
-{
- gdouble page_ratio;
- gdouble w, h;
-
- tiff_document_get_page_size (EV_DOCUMENT (document),
- page,
- &w, &h);
- g_return_if_fail (w > 0);
- page_ratio = h/w;
- *width = suggested_width;
- *height = (gint) (suggested_width * page_ratio);
-}
-
-static void
-tiff_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
-{
- iface->get_thumbnail = tiff_document_thumbnails_get_thumbnail;
- iface->get_dimensions = tiff_document_thumbnails_get_dimensions;
-}
-
-
-static void
-tiff_document_init (TiffDocument *tiff_document)
-{
- tiff_document->n_pages = -1;
-}
https://www.fi.muni.cz/~kas/git / evince.git / blobdiff