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
  22 #include <config.h>
  23 #include "pixbuf-document.h"
  24 #include "ev-document-thumbnails.h"
  25 #include "ev-document-misc.h"
  26
  27 struct _PixbufDocumentClass
  28 {
  29         GObjectClass parent_class;
  30 };
  31
  32 struct _PixbufDocument
  33 {
  34         GObject parent_instance;
  35
  36         GdkPixbuf *pixbuf;
  37
  38         gchar *uri;
  39 };
  40
  41 typedef struct _PixbufDocumentClass PixbufDocumentClass;
  42
  43 static void pixbuf_document_document_iface_init (EvDocumentIface *iface);
  44 static void pixbuf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface);
  45
  46 EV_BACKEND_REGISTER_WITH_CODE (PixbufDocument, pixbuf_document,
  47                    {
  48                          G_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                                int           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
 146         gobject_class->finalize = pixbuf_document_finalize;
 147 }
 148
 149 static EvDocumentInfo *
 150 pixbuf_document_get_info (EvDocument *document)
 151 {
 152         EvDocumentInfo *info;
 153
 154         info = g_new0 (EvDocumentInfo, 1);
 155         info->fields_mask = 0;
 156
 157         return info;
 158 }
 159
 160 static void
 161 pixbuf_document_document_iface_init (EvDocumentIface *iface)
 162 {
 163         iface->load = pixbuf_document_load;
 164         iface->save = pixbuf_document_save;
 165         iface->get_n_pages = pixbuf_document_get_n_pages;
 166         iface->get_page_size = pixbuf_document_get_page_size;
 167         iface->render = pixbuf_document_render;
 168         iface->get_info = pixbuf_document_get_info;
 169 }
 170
 171 static GdkPixbuf *
 172 pixbuf_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
 173                                           EvRenderContext      *rc,
 174                                           gboolean              border)
 175 {
 176         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 177         GdkPixbuf *pixbuf, *rotated_pixbuf;
 178         gint width, height;
 179
 180         width = (gint) (gdk_pixbuf_get_width (pixbuf_document->pixbuf) * rc->scale);
 181         height = (gint) (gdk_pixbuf_get_height (pixbuf_document->pixbuf) * rc->scale);
 182
 183         pixbuf = gdk_pixbuf_scale_simple (pixbuf_document->pixbuf,
 184                                           width, height,
 185                                           GDK_INTERP_BILINEAR);
 186
 187         rotated_pixbuf = gdk_pixbuf_rotate_simple (pixbuf, 360 - rc->rotation);
 188         g_object_unref (pixbuf);
 189
 190         return rotated_pixbuf;
 191 }
 192
 193 static void
 194 pixbuf_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
 195                                            EvRenderContext      *rc,
 196                                            gint                 *width,
 197                                            gint                 *height)
 198 {
 199         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 200         gint p_width = gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 201         gint p_height = gdk_pixbuf_get_height (pixbuf_document->pixbuf);
 202
 203         if (rc->rotation == 90 || rc->rotation == 270) {
 204                 *width = (gint) (p_height * rc->scale);
 205                 *height = (gint) (p_width * rc->scale);
 206         } else {
 207                 *width = (gint) (p_width * rc->scale);
 208                 *height = (gint) (p_height * rc->scale);
 209         }
 210 }
 211
 212 static void
 213 pixbuf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
 214 {
 215         iface->get_thumbnail = pixbuf_document_thumbnails_get_thumbnail;
 216         iface->get_dimensions = pixbuf_document_thumbnails_get_dimensions;
 217 }
 218
 219
 220 static void
 221 pixbuf_document_init (PixbufDocument *pixbuf_document)
 222 {
 223 }