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 "pixbuf-document.h"
  21 #include "ev-document-thumbnails.h"
  22
  23 #include <libgnomevfs/gnome-vfs-uri.h>
  24 #include <libgnomevfs/gnome-vfs-utils.h>
  25 #include <libgnomevfs/gnome-vfs-ops.h>
  26 #include <libgnomevfs/gnome-vfs-xfer.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 G_DEFINE_TYPE_WITH_CODE (PixbufDocument, pixbuf_document, G_TYPE_OBJECT,
  48                          { G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT,
  49                                                   pixbuf_document_document_iface_init);
  50                          G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
  51                                                 pixbuf_document_document_thumbnails_iface_init)
  52                                    });
  53
  54 static gboolean
  55 pixbuf_document_load (EvDocument  *document,
  56                       const char  *uri,
  57                       GError     **error)
  58 {
  59         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
  60
  61         gchar *filename;
  62         GdkPixbuf *pixbuf;
  63
  64         /* FIXME: We could actually load uris  */
  65         filename = g_filename_from_uri (uri, NULL, error);
  66         if (!filename)
  67                 return FALSE;
  68
  69         pixbuf = gdk_pixbuf_new_from_file (filename, error);
  70
  71         if (!pixbuf)
  72                 return FALSE;
  73
  74         pixbuf_document->pixbuf = pixbuf;
  75         g_free (pixbuf_document->uri);
  76         pixbuf_document->uri = g_strdup (uri);
  77
  78         return TRUE;
  79 }
  80
  81 static gboolean
  82 pixbuf_document_save (EvDocument  *document,
  83                       const char  *uri,
  84                       GError     **error)
  85 {
  86         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
  87         GnomeVFSResult result;
  88         GnomeVFSURI *source_uri;
  89         GnomeVFSURI *target_uri;
  90
  91         if (!pixbuf_document->uri)
  92                 return FALSE;
  93
  94         source_uri = gnome_vfs_uri_new (pixbuf_document->uri);
  95         target_uri = gnome_vfs_uri_new (uri);
  96
  97         result = gnome_vfs_xfer_uri (source_uri, target_uri,
  98                                      GNOME_VFS_XFER_DEFAULT | GNOME_VFS_XFER_FOLLOW_LINKS,
  99                                      GNOME_VFS_XFER_ERROR_MODE_ABORT,
 100                                      GNOME_VFS_XFER_OVERWRITE_MODE_REPLACE,
 101                                      NULL,
 102                                      NULL);
 103         gnome_vfs_uri_unref (target_uri);
 104         gnome_vfs_uri_unref (source_uri);
 105
 106         if (result != GNOME_VFS_OK)
 107                 g_set_error (error,
 108                              EV_DOCUMENT_ERROR,
 109                              0,
 110                              gnome_vfs_result_to_string (result));
 111         return (result == GNOME_VFS_OK);
 112 }
 113
 114 static int
 115 pixbuf_document_get_n_pages (EvDocument  *document)
 116 {
 117         return 1;
 118 }
 119
 120 static void
 121 pixbuf_document_get_page_size (EvDocument   *document,
 122                                int           page,
 123                                double       *width,
 124                                double       *height)
 125 {
 126         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 127
 128         *width = gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 129         *height = gdk_pixbuf_get_height (pixbuf_document->pixbuf);
 130 }
 131
 132 static GdkPixbuf*
 133 pixbuf_document_render_pixbuf (EvDocument      *document,
 134                                EvRenderContext *rc)
 135 {
 136         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 137         GdkPixbuf *scaled_pixbuf, *rotated_pixbuf;
 138
 139         scaled_pixbuf = gdk_pixbuf_scale_simple (pixbuf_document->pixbuf,
 140                                                  gdk_pixbuf_get_width (pixbuf_document->pixbuf) * rc->scale,
 141                                                  gdk_pixbuf_get_height (pixbuf_document->pixbuf) * rc->scale,
 142                                                  GDK_INTERP_BILINEAR);
 143
 144         rotated_pixbuf = gdk_pixbuf_rotate_simple (scaled_pixbuf, 360 - rc->rotation);
 145         g_object_unref (scaled_pixbuf);
 146
 147         return rotated_pixbuf;
 148 }
 149
 150 static void
 151 pixbuf_document_finalize (GObject *object)
 152 {
 153         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (object);
 154
 155         g_object_unref (pixbuf_document->pixbuf);
 156         g_free (pixbuf_document->uri);
 157
 158         G_OBJECT_CLASS (pixbuf_document_parent_class)->finalize (object);
 159 }
 160
 161 static void
 162 pixbuf_document_class_init (PixbufDocumentClass *klass)
 163 {
 164         GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 165
 166         gobject_class->finalize = pixbuf_document_finalize;
 167 }
 168
 169 static gboolean
 170 pixbuf_document_can_get_text (EvDocument *document)
 171 {
 172         return FALSE;
 173 }
 174
 175 static EvDocumentInfo *
 176 pixbuf_document_get_info (EvDocument *document)
 177 {
 178         EvDocumentInfo *info;
 179
 180         info = g_new0 (EvDocumentInfo, 1);
 181         info->fields_mask = 0;
 182
 183         return info;
 184 }
 185
 186 static void
 187 pixbuf_document_document_iface_init (EvDocumentIface *iface)
 188 {
 189         iface->load = pixbuf_document_load;
 190         iface->save = pixbuf_document_save;
 191         iface->can_get_text = pixbuf_document_can_get_text;
 192         iface->get_n_pages = pixbuf_document_get_n_pages;
 193         iface->get_page_size = pixbuf_document_get_page_size;
 194         iface->render_pixbuf = pixbuf_document_render_pixbuf;
 195         iface->get_info = pixbuf_document_get_info;
 196 }
 197
 198 static GdkPixbuf *
 199 pixbuf_document_thumbnails_get_thumbnail (EvDocumentThumbnails   *document,
 200                                           gint                    page,
 201                                           gint                    rotation,
 202                                           gint                    size,
 203                                           gboolean                border)
 204 {
 205         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 206         GdkPixbuf *pixbuf, *rotated_pixbuf;
 207         gdouble scale_factor;
 208         gint height;
 209
 210         scale_factor = (gdouble)size / gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 211
 212         height = gdk_pixbuf_get_height (pixbuf_document->pixbuf) * scale_factor;
 213
 214         pixbuf = gdk_pixbuf_scale_simple (pixbuf_document->pixbuf, size, height,
 215                                           GDK_INTERP_BILINEAR);
 216
 217         rotated_pixbuf = gdk_pixbuf_rotate_simple (pixbuf, 360 - rotation);
 218         g_object_unref (pixbuf);
 219
 220         return rotated_pixbuf;
 221 }
 222
 223 static void
 224 pixbuf_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
 225                                            gint                  page,
 226                                            gint                  suggested_width,
 227                                            gint                  *width,
 228                                            gint                  *height)
 229 {
 230         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 231         gdouble page_ratio;
 232
 233         page_ratio = ((double)gdk_pixbuf_get_height (pixbuf_document->pixbuf)) /
 234                      gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 235         *width = suggested_width;
 236         *height = (gint) (suggested_width * page_ratio);
 237 }
 238
 239 static void
 240 pixbuf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
 241 {
 242         iface->get_thumbnail = pixbuf_document_thumbnails_get_thumbnail;
 243         iface->get_dimensions = pixbuf_document_thumbnails_get_dimensions;
 244 }
 245
 246
 247 static void
 248 pixbuf_document_init (PixbufDocument *pixbuf_document)
 249 {
 250 }