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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #include <config.h>
  21 #include <glib/gi18n.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         GObjectClass parent_class;
  31 };
  32
  33 struct _PixbufDocument
  34 {
  35         GObject parent_instance;
  36
  37         GdkPixbuf *pixbuf;
  38
  39         gchar *uri;
  40 };
  41
  42 typedef struct _PixbufDocumentClass PixbufDocumentClass;
  43
  44 static void pixbuf_document_document_iface_init (EvDocumentIface *iface);
  45 static void pixbuf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface);
  46
  47 EV_BACKEND_REGISTER_WITH_CODE (PixbufDocument, pixbuf_document,
  48                    {
  49                          EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
  50                                                          pixbuf_document_document_thumbnails_iface_init)
  51                    });
  52
  53 static gboolean
  54 pixbuf_document_load (EvDocument  *document,
  55                       const char  *uri,
  56                       GError     **error)
  57 {
  58         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
  59
  60         gchar *filename;
  61         GdkPixbuf *pixbuf;
  62
  63         /* FIXME: We could actually load uris  */
  64         filename = g_filename_from_uri (uri, NULL, error);
  65         if (!filename)
  66                 return FALSE;
  67
  68         pixbuf = gdk_pixbuf_new_from_file (filename, error);
  69
  70         if (!pixbuf)
  71                 return FALSE;
  72
  73         pixbuf_document->pixbuf = pixbuf;
  74         g_free (pixbuf_document->uri);
  75         pixbuf_document->uri = g_strdup (uri);
  76
  77         return TRUE;
  78 }
  79
  80 static gboolean
  81 pixbuf_document_save (EvDocument  *document,
  82                       const char  *uri,
  83                       GError     **error)
  84 {
  85         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
  86
  87         return ev_xfer_uri_simple (pixbuf_document->uri, uri, error);
  88 }
  89
  90 static int
  91 pixbuf_document_get_n_pages (EvDocument  *document)
  92 {
  93         return 1;
  94 }
  95
  96 static void
  97 pixbuf_document_get_page_size (EvDocument   *document,
  98                                EvPage       *page,
  99                                double       *width,
 100                                double       *height)
 101 {
 102         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 103
 104         *width = gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 105         *height = gdk_pixbuf_get_height (pixbuf_document->pixbuf);
 106 }
 107
 108 static cairo_surface_t *
 109 pixbuf_document_render (EvDocument      *document,
 110                         EvRenderContext *rc)
 111 {
 112         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 113         GdkPixbuf *scaled_pixbuf, *rotated_pixbuf;
 114         cairo_surface_t *surface;
 115
 116         scaled_pixbuf = gdk_pixbuf_scale_simple (
 117                 pixbuf_document->pixbuf,
 118                 (gdk_pixbuf_get_width (pixbuf_document->pixbuf) * rc->scale) + 0.5,
 119                 (gdk_pixbuf_get_height (pixbuf_document->pixbuf) * rc->scale) + 0.5,
 120                 GDK_INTERP_BILINEAR);
 121
 122         rotated_pixbuf = gdk_pixbuf_rotate_simple (scaled_pixbuf, 360 - rc->rotation);
 123         g_object_unref (scaled_pixbuf);
 124
 125         surface = ev_document_misc_surface_from_pixbuf (rotated_pixbuf);
 126         g_object_unref (rotated_pixbuf);
 127
 128         return surface;
 129 }
 130
 131 static void
 132 pixbuf_document_finalize (GObject *object)
 133 {
 134         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (object);
 135
 136         g_object_unref (pixbuf_document->pixbuf);
 137         g_free (pixbuf_document->uri);
 138
 139         G_OBJECT_CLASS (pixbuf_document_parent_class)->finalize (object);
 140 }
 141
 142 static void
 143 pixbuf_document_class_init (PixbufDocumentClass *klass)
 144 {
 145         GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 146
 147         gobject_class->finalize = pixbuf_document_finalize;
 148 }
 149
 150 static EvDocumentInfo *
 151 pixbuf_document_get_info (EvDocument *document)
 152 {
 153         EvDocumentInfo *info;
 154
 155         info = g_new0 (EvDocumentInfo, 1);
 156         info->fields_mask = 0;
 157
 158         return info;
 159 }
 160
 161 static void
 162 pixbuf_document_document_iface_init (EvDocumentIface *iface)
 163 {
 164         iface->load = pixbuf_document_load;
 165         iface->save = pixbuf_document_save;
 166         iface->get_n_pages = pixbuf_document_get_n_pages;
 167         iface->get_page_size = pixbuf_document_get_page_size;
 168         iface->render = pixbuf_document_render;
 169         iface->get_info = pixbuf_document_get_info;
 170 }
 171
 172 static GdkPixbuf *
 173 pixbuf_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
 174                                           EvRenderContext      *rc,
 175                                           gboolean              border)
 176 {
 177         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 178         GdkPixbuf *pixbuf, *rotated_pixbuf;
 179         gint width, height;
 180
 181         width = (gint) (gdk_pixbuf_get_width (pixbuf_document->pixbuf) * rc->scale);
 182         height = (gint) (gdk_pixbuf_get_height (pixbuf_document->pixbuf) * rc->scale);
 183
 184         pixbuf = gdk_pixbuf_scale_simple (pixbuf_document->pixbuf,
 185                                           width, height,
 186                                           GDK_INTERP_BILINEAR);
 187
 188         rotated_pixbuf = gdk_pixbuf_rotate_simple (pixbuf, 360 - rc->rotation);
 189         g_object_unref (pixbuf);
 190
 191         return rotated_pixbuf;
 192 }
 193
 194 static void
 195 pixbuf_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
 196                                            EvRenderContext      *rc,
 197                                            gint                 *width,
 198                                            gint                 *height)
 199 {
 200         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 201         gint p_width = gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 202         gint p_height = gdk_pixbuf_get_height (pixbuf_document->pixbuf);
 203
 204         if (rc->rotation == 90 || rc->rotation == 270) {
 205                 *width = (gint) (p_height * rc->scale);
 206                 *height = (gint) (p_width * rc->scale);
 207         } else {
 208                 *width = (gint) (p_width * rc->scale);
 209                 *height = (gint) (p_height * rc->scale);
 210         }
 211 }
 212
 213 static void
 214 pixbuf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
 215 {
 216         iface->get_thumbnail = pixbuf_document_thumbnails_get_thumbnail;
 217         iface->get_dimensions = pixbuf_document_thumbnails_get_dimensions;
 218 }
 219
 220
 221 static void
 222 pixbuf_document_init (PixbufDocument *pixbuf_document)
 223 {
 224 }