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 "pixbuf-document.h"
  21 #include "ev-document-thumbnails.h"
  22 #include "ev-document-misc.h"
  23
  24 struct _PixbufDocumentClass
  25 {
  26         GObjectClass parent_class;
  27 };
  28
  29 struct _PixbufDocument
  30 {
  31         GObject parent_instance;
  32
  33         GdkPixbuf *pixbuf;
  34
  35         gchar *uri;
  36 };
  37
  38 typedef struct _PixbufDocumentClass PixbufDocumentClass;
  39
  40 static void pixbuf_document_document_iface_init (EvDocumentIface *iface);
  41 static void pixbuf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface);
  42
  43 G_DEFINE_TYPE_WITH_CODE (PixbufDocument, pixbuf_document, G_TYPE_OBJECT,
  44                          { G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT,
  45                                                   pixbuf_document_document_iface_init);
  46                          G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
  47                                                 pixbuf_document_document_thumbnails_iface_init)
  48                                    });
  49
  50 static gboolean
  51 pixbuf_document_load (EvDocument  *document,
  52                       const char  *uri,
  53                       GError     **error)
  54 {
  55         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
  56
  57         gchar *filename;
  58         GdkPixbuf *pixbuf;
  59
  60         /* FIXME: We could actually load uris  */
  61         filename = g_filename_from_uri (uri, NULL, error);
  62         if (!filename)
  63                 return FALSE;
  64
  65         pixbuf = gdk_pixbuf_new_from_file (filename, error);
  66
  67         if (!pixbuf)
  68                 return FALSE;
  69
  70         pixbuf_document->pixbuf = pixbuf;
  71         g_free (pixbuf_document->uri);
  72         pixbuf_document->uri = g_strdup (uri);
  73
  74         return TRUE;
  75 }
  76
  77 static gboolean
  78 pixbuf_document_save (EvDocument  *document,
  79                       const char  *uri,
  80                       GError     **error)
  81 {
  82         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
  83
  84         return ev_xfer_uri_simple (pixbuf_document->uri, uri, error);
  85 }
  86
  87 static int
  88 pixbuf_document_get_n_pages (EvDocument  *document)
  89 {
  90         return 1;
  91 }
  92
  93 static void
  94 pixbuf_document_get_page_size (EvDocument   *document,
  95                                int           page,
  96                                double       *width,
  97                                double       *height)
  98 {
  99         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 100
 101         *width = gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 102         *height = gdk_pixbuf_get_height (pixbuf_document->pixbuf);
 103 }
 104
 105 static cairo_surface_t *
 106 pixbuf_document_render (EvDocument      *document,
 107                         EvRenderContext *rc)
 108 {
 109         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 110         GdkPixbuf *scaled_pixbuf, *rotated_pixbuf;
 111         cairo_surface_t *surface;
 112
 113         scaled_pixbuf = gdk_pixbuf_scale_simple (
 114                 pixbuf_document->pixbuf,
 115                 (gdk_pixbuf_get_width (pixbuf_document->pixbuf) * rc->scale) + 0.5,
 116                 (gdk_pixbuf_get_height (pixbuf_document->pixbuf) * rc->scale) + 0.5,
 117                 GDK_INTERP_BILINEAR);
 118
 119         rotated_pixbuf = gdk_pixbuf_rotate_simple (scaled_pixbuf, 360 - rc->rotation);
 120         g_object_unref (scaled_pixbuf);
 121
 122         surface = ev_document_misc_surface_from_pixbuf (rotated_pixbuf);
 123         g_object_unref (rotated_pixbuf);
 124
 125         return surface;
 126 }
 127
 128 static void
 129 pixbuf_document_finalize (GObject *object)
 130 {
 131         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (object);
 132
 133         g_object_unref (pixbuf_document->pixbuf);
 134         g_free (pixbuf_document->uri);
 135
 136         G_OBJECT_CLASS (pixbuf_document_parent_class)->finalize (object);
 137 }
 138
 139 static void
 140 pixbuf_document_class_init (PixbufDocumentClass *klass)
 141 {
 142         GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 143
 144         gobject_class->finalize = pixbuf_document_finalize;
 145 }
 146
 147 static EvDocumentInfo *
 148 pixbuf_document_get_info (EvDocument *document)
 149 {
 150         EvDocumentInfo *info;
 151
 152         info = g_new0 (EvDocumentInfo, 1);
 153         info->fields_mask = 0;
 154
 155         return info;
 156 }
 157
 158 static void
 159 pixbuf_document_document_iface_init (EvDocumentIface *iface)
 160 {
 161         iface->load = pixbuf_document_load;
 162         iface->save = pixbuf_document_save;
 163         iface->get_n_pages = pixbuf_document_get_n_pages;
 164         iface->get_page_size = pixbuf_document_get_page_size;
 165         iface->render = pixbuf_document_render;
 166         iface->get_info = pixbuf_document_get_info;
 167 }
 168
 169 static GdkPixbuf *
 170 pixbuf_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
 171                                           EvRenderContext      *rc,
 172                                           gboolean              border)
 173 {
 174         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 175         GdkPixbuf *pixbuf, *rotated_pixbuf;
 176         gint width, height;
 177
 178         width = (gint) (gdk_pixbuf_get_width (pixbuf_document->pixbuf) * rc->scale);
 179         height = (gint) (gdk_pixbuf_get_height (pixbuf_document->pixbuf) * rc->scale);
 180
 181         pixbuf = gdk_pixbuf_scale_simple (pixbuf_document->pixbuf,
 182                                           width, height,
 183                                           GDK_INTERP_BILINEAR);
 184
 185         rotated_pixbuf = gdk_pixbuf_rotate_simple (pixbuf, 360 - rc->rotation);
 186         g_object_unref (pixbuf);
 187
 188         return rotated_pixbuf;
 189 }
 190
 191 static void
 192 pixbuf_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
 193                                            EvRenderContext      *rc,
 194                                            gint                 *width,
 195                                            gint                 *height)
 196 {
 197         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 198         gint p_width = gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 199         gint p_height = gdk_pixbuf_get_height (pixbuf_document->pixbuf);
 200
 201         if (rc->rotation == 90 || rc->rotation == 270) {
 202                 *width = (gint) (p_height * rc->scale);
 203                 *height = (gint) (p_width * rc->scale);
 204         } else {
 205                 *width = (gint) (p_width * rc->scale);
 206                 *height = (gint) (p_height * rc->scale);
 207         }
 208 }
 209
 210 static void
 211 pixbuf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
 212 {
 213         iface->get_thumbnail = pixbuf_document_thumbnails_get_thumbnail;
 214         iface->get_dimensions = pixbuf_document_thumbnails_get_dimensions;
 215 }
 216
 217
 218 static void
 219 pixbuf_document_init (PixbufDocument *pixbuf_document)
 220 {
 221 }