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 struct _PixbufDocumentClass
  24 {
  25         GObjectClass parent_class;
  26 };
  27
  28 struct _PixbufDocument
  29 {
  30         GObject parent_instance;
  31
  32         GdkPixbuf *pixbuf;
  33
  34         gchar *uri;
  35 };
  36
  37 typedef struct _PixbufDocumentClass PixbufDocumentClass;
  38
  39 static void pixbuf_document_document_iface_init (EvDocumentIface *iface);
  40 static void pixbuf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface);
  41
  42 G_DEFINE_TYPE_WITH_CODE (PixbufDocument, pixbuf_document, G_TYPE_OBJECT,
  43                          { G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT,
  44                                                   pixbuf_document_document_iface_init);
  45                          G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
  46                                                 pixbuf_document_document_thumbnails_iface_init)
  47                                    });
  48
  49 static gboolean
  50 pixbuf_document_load (EvDocument  *document,
  51                       const char  *uri,
  52                       GError     **error)
  53 {
  54         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
  55
  56         gchar *filename;
  57         GdkPixbuf *pixbuf;
  58
  59         /* FIXME: We could actually load uris  */
  60         filename = g_filename_from_uri (uri, NULL, error);
  61         if (!filename)
  62                 return FALSE;
  63
  64         pixbuf = gdk_pixbuf_new_from_file (filename, error);
  65
  66         if (!pixbuf)
  67                 return FALSE;
  68
  69         pixbuf_document->pixbuf = pixbuf;
  70         g_free (pixbuf_document->uri);
  71         pixbuf_document->uri = g_strdup (uri);
  72
  73         return TRUE;
  74 }
  75
  76 static gboolean
  77 pixbuf_document_save (EvDocument  *document,
  78                       const char  *uri,
  79                       GError     **error)
  80 {
  81         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
  82
  83         return ev_xfer_uri_simple (pixbuf_document->uri, uri, error);
  84 }
  85
  86 static int
  87 pixbuf_document_get_n_pages (EvDocument  *document)
  88 {
  89         return 1;
  90 }
  91
  92 static void
  93 pixbuf_document_get_page_size (EvDocument   *document,
  94                                int           page,
  95                                double       *width,
  96                                double       *height)
  97 {
  98         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
  99
 100         *width = gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 101         *height = gdk_pixbuf_get_height (pixbuf_document->pixbuf);
 102 }
 103
 104 static GdkPixbuf*
 105 pixbuf_document_render_pixbuf (EvDocument      *document,
 106                                EvRenderContext *rc)
 107 {
 108         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 109         GdkPixbuf *scaled_pixbuf, *rotated_pixbuf;
 110
 111         scaled_pixbuf = gdk_pixbuf_scale_simple (pixbuf_document->pixbuf,
 112                                                  gdk_pixbuf_get_width (pixbuf_document->pixbuf) * rc->scale,
 113                                                  gdk_pixbuf_get_height (pixbuf_document->pixbuf) * rc->scale,
 114                                                  GDK_INTERP_BILINEAR);
 115
 116         rotated_pixbuf = gdk_pixbuf_rotate_simple (scaled_pixbuf, 360 - rc->rotation);
 117         g_object_unref (scaled_pixbuf);
 118
 119         return rotated_pixbuf;
 120 }
 121
 122 static void
 123 pixbuf_document_finalize (GObject *object)
 124 {
 125         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (object);
 126
 127         g_object_unref (pixbuf_document->pixbuf);
 128         g_free (pixbuf_document->uri);
 129
 130         G_OBJECT_CLASS (pixbuf_document_parent_class)->finalize (object);
 131 }
 132
 133 static void
 134 pixbuf_document_class_init (PixbufDocumentClass *klass)
 135 {
 136         GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 137
 138         gobject_class->finalize = pixbuf_document_finalize;
 139 }
 140
 141 static gboolean
 142 pixbuf_document_can_get_text (EvDocument *document)
 143 {
 144         return FALSE;
 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->can_get_text = pixbuf_document_can_get_text;
 164         iface->get_n_pages = pixbuf_document_get_n_pages;
 165         iface->get_page_size = pixbuf_document_get_page_size;
 166         iface->render_pixbuf = pixbuf_document_render_pixbuf;
 167         iface->get_info = pixbuf_document_get_info;
 168 }
 169
 170 static GdkPixbuf *
 171 pixbuf_document_thumbnails_get_thumbnail (EvDocumentThumbnails   *document,
 172                                           gint                    page,
 173                                           gint                    rotation,
 174                                           gint                    size,
 175                                           gboolean                border)
 176 {
 177         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 178         GdkPixbuf *pixbuf, *rotated_pixbuf;
 179         gdouble scale_factor;
 180         gint height;
 181
 182         scale_factor = (gdouble)size / gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 183
 184         height = gdk_pixbuf_get_height (pixbuf_document->pixbuf) * scale_factor;
 185
 186         pixbuf = gdk_pixbuf_scale_simple (pixbuf_document->pixbuf, size, height,
 187                                           GDK_INTERP_BILINEAR);
 188
 189         rotated_pixbuf = gdk_pixbuf_rotate_simple (pixbuf, 360 - rotation);
 190         g_object_unref (pixbuf);
 191
 192         return rotated_pixbuf;
 193 }
 194
 195 static void
 196 pixbuf_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
 197                                            gint                  page,
 198                                            gint                  suggested_width,
 199                                            gint                  *width,
 200                                            gint                  *height)
 201 {
 202         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 203         gdouble page_ratio;
 204
 205         page_ratio = ((double)gdk_pixbuf_get_height (pixbuf_document->pixbuf)) /
 206                      gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 207         *width = suggested_width;
 208         *height = (gint) (suggested_width * page_ratio);
 209 }
 210
 211 static void
 212 pixbuf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
 213 {
 214         iface->get_thumbnail = pixbuf_document_thumbnails_get_thumbnail;
 215         iface->get_dimensions = pixbuf_document_thumbnails_get_dimensions;
 216 }
 217
 218
 219 static void
 220 pixbuf_document_init (PixbufDocument *pixbuf_document)
 221 {
 222 }