backend/pixbuf/pixbuf-document.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
   2 /*
   3  * Copyright (C) 2004, Anders Carlsson <andersca@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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  */
  19
  20 #include <config.h>
  21 #include <glib/gi18n-lib.h>
  22
  23 #include "pixbuf-document.h"
  24 #include "ev-document-thumbnails.h"
  25 #include "ev-document-misc.h"
  26 #include "ev-file-helpers.h"
  27
  28 struct _PixbufDocumentClass
  29 {
  30         EvDocumentClass parent_class;
  31 };
  32
  33 struct _PixbufDocument
  34 {
  35         EvDocument parent_instance;
  36
  37         GdkPixbuf *pixbuf;
  38
  39         gchar *uri;
  40 };
  41
  42 typedef struct _PixbufDocumentClass PixbufDocumentClass;
  43
  44 static void pixbuf_document_document_thumbnails_iface_init (EvDocumentThumbnailsInterface *iface);
  45
  46 EV_BACKEND_REGISTER_WITH_CODE (PixbufDocument, pixbuf_document,
  47                    {
  48                          EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
  49                                                          pixbuf_document_document_thumbnails_iface_init)
  50                    });
  51
  52 static gboolean
  53 pixbuf_document_load (EvDocument  *document,
  54                       const char  *uri,
  55                       GError     **error)
  56 {
  57         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
  58
  59         gchar *filename;
  60         GdkPixbuf *pixbuf;
  61
  62         /* FIXME: We could actually load uris  */
  63         filename = g_filename_from_uri (uri, NULL, error);
  64         if (!filename)
  65                 return FALSE;
  66
  67         pixbuf = gdk_pixbuf_new_from_file (filename, error);
  68
  69         if (!pixbuf)
  70                 return FALSE;
  71
  72         pixbuf_document->pixbuf = pixbuf;
  73         g_free (pixbuf_document->uri);
  74         pixbuf_document->uri = g_strdup (uri);
  75
  76         return TRUE;
  77 }
  78
  79 static gboolean
  80 pixbuf_document_save (EvDocument  *document,
  81                       const char  *uri,
  82                       GError     **error)
  83 {
  84         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
  85
  86         return ev_xfer_uri_simple (pixbuf_document->uri, uri, error);
  87 }
  88
  89 static int
  90 pixbuf_document_get_n_pages (EvDocument  *document)
  91 {
  92         return 1;
  93 }
  94
  95 static void
  96 pixbuf_document_get_page_size (EvDocument   *document,
  97                                EvPage       *page,
  98                                double       *width,
  99                                double       *height)
 100 {
 101         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 102
 103         *width = gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 104         *height = gdk_pixbuf_get_height (pixbuf_document->pixbuf);
 105 }
 106
 107 static cairo_surface_t *
 108 pixbuf_document_render (EvDocument      *document,
 109                         EvRenderContext *rc)
 110 {
 111         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 112         GdkPixbuf *scaled_pixbuf, *rotated_pixbuf;
 113         cairo_surface_t *surface;
 114
 115         scaled_pixbuf = gdk_pixbuf_scale_simple (
 116                 pixbuf_document->pixbuf,
 117                 (gdk_pixbuf_get_width (pixbuf_document->pixbuf) * rc->scale) + 0.5,
 118                 (gdk_pixbuf_get_height (pixbuf_document->pixbuf) * rc->scale) + 0.5,
 119                 GDK_INTERP_BILINEAR);
 120
 121         rotated_pixbuf = gdk_pixbuf_rotate_simple (scaled_pixbuf, 360 - rc->rotation);
 122         g_object_unref (scaled_pixbuf);
 123
 124         surface = ev_document_misc_surface_from_pixbuf (rotated_pixbuf);
 125         g_object_unref (rotated_pixbuf);
 126
 127         return surface;
 128 }
 129
 130 static void
 131 pixbuf_document_finalize (GObject *object)
 132 {
 133         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (object);
 134
 135         g_object_unref (pixbuf_document->pixbuf);
 136         g_free (pixbuf_document->uri);
 137
 138         G_OBJECT_CLASS (pixbuf_document_parent_class)->finalize (object);
 139 }
 140
 141 static void
 142 pixbuf_document_class_init (PixbufDocumentClass *klass)
 143 {
 144         GObjectClass    *gobject_class = G_OBJECT_CLASS (klass);
 145         EvDocumentClass *ev_document_class = EV_DOCUMENT_CLASS (klass);
 146
 147         gobject_class->finalize = pixbuf_document_finalize;
 148
 149         ev_document_class->load = pixbuf_document_load;
 150         ev_document_class->save = pixbuf_document_save;
 151         ev_document_class->get_n_pages = pixbuf_document_get_n_pages;
 152         ev_document_class->get_page_size = pixbuf_document_get_page_size;
 153         ev_document_class->render = pixbuf_document_render;
 154 }
 155
 156 static GdkPixbuf *
 157 pixbuf_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
 158                                           EvRenderContext      *rc,
 159                                           gboolean              border)
 160 {
 161         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 162         GdkPixbuf *pixbuf, *rotated_pixbuf;
 163         gint width, height;
 164
 165         width = (gint) (gdk_pixbuf_get_width (pixbuf_document->pixbuf) * rc->scale);
 166         height = (gint) (gdk_pixbuf_get_height (pixbuf_document->pixbuf) * rc->scale);
 167
 168         pixbuf = gdk_pixbuf_scale_simple (pixbuf_document->pixbuf,
 169                                           width, height,
 170                                           GDK_INTERP_BILINEAR);
 171
 172         rotated_pixbuf = gdk_pixbuf_rotate_simple (pixbuf, 360 - rc->rotation);
 173         g_object_unref (pixbuf);
 174
 175         return rotated_pixbuf;
 176 }
 177
 178 static void
 179 pixbuf_document_document_thumbnails_iface_init (EvDocumentThumbnailsInterface *iface)
 180 {
 181         iface->get_thumbnail = pixbuf_document_thumbnails_get_thumbnail;
 182 }
 183
 184
 185 static void
 186 pixbuf_document_init (PixbufDocument *pixbuf_document)
 187 {
 188 }