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 enum {
  24         PROP_0,
  25         PROP_TITLE
  26 };
  27
  28 struct _PixbufDocumentClass
  29 {
  30         GObjectClass parent_class;
  31 };
  32
  33 struct _PixbufDocument
  34 {
  35         GObject parent_instance;
  36
  37         GdkPixbuf *pixbuf;
  38         GdkDrawable *target;
  39         gdouble scale;
  40
  41         gint x_offset, y_offset;
  42 };
  43
  44 typedef struct _PixbufDocumentClass PixbufDocumentClass;
  45
  46 static void pixbuf_document_document_iface_init (EvDocumentIface *iface);
  47 static void pixbuf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface);
  48
  49 G_DEFINE_TYPE_WITH_CODE (PixbufDocument, pixbuf_document, G_TYPE_OBJECT,
  50                          { G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT,
  51                                                   pixbuf_document_document_iface_init);
  52                          G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
  53                                                 pixbuf_document_document_thumbnails_iface_init)
  54                                    });
  55
  56 static gboolean
  57 pixbuf_document_load (EvDocument  *document,
  58                       const char  *uri,
  59                       GError     **error)
  60 {
  61         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
  62
  63         gchar *filename;
  64         GdkPixbuf *pixbuf;
  65
  66         /* FIXME: We could actually load uris  */
  67         filename = g_filename_from_uri (uri, NULL, error);
  68         if (!filename)
  69                 return FALSE;
  70
  71         pixbuf = gdk_pixbuf_new_from_file (filename, error);
  72
  73         if (!pixbuf)
  74                 return FALSE;
  75
  76         pixbuf_document->pixbuf = pixbuf;
  77
  78         return TRUE;
  79 }
  80
  81 static gboolean
  82 pixbuf_document_save (EvDocument  *document,
  83                       const char  *uri,
  84                       GError     **error)
  85 {
  86         g_warning ("pixbuf_document_save not implemented"); /* FIXME */
  87         return TRUE;
  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_set_page (EvDocument  *document,
  98                           int          page)
  99 {
 100         /* Do nothing */
 101 }
 102
 103 static int
 104 pixbuf_document_get_page (EvDocument  *document)
 105 {
 106         return 1;
 107 }
 108
 109 static void
 110 pixbuf_document_set_scale (EvDocument  *document,
 111                            double       scale)
 112 {
 113         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 114
 115         pixbuf_document->scale = scale;
 116 }
 117
 118 static void
 119 pixbuf_document_get_page_size (EvDocument   *document,
 120                                int           page,
 121                                int          *width,
 122                                int          *height)
 123 {
 124         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 125
 126         if (width)
 127                 *width = gdk_pixbuf_get_width (pixbuf_document->pixbuf) * pixbuf_document->scale;
 128         if (height)
 129                 *height = gdk_pixbuf_get_height (pixbuf_document->pixbuf) * pixbuf_document->scale;
 130 }
 131
 132 static GdkPixbuf*
 133 pixbuf_document_render_pixbuf (EvDocument  *document)
 134 {
 135         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 136         return gdk_pixbuf_scale_simple (pixbuf_document->pixbuf,
 137                                         gdk_pixbuf_get_width (pixbuf_document->pixbuf) * pixbuf_document->scale,
 138                                         gdk_pixbuf_get_height (pixbuf_document->pixbuf) * pixbuf_document->scale,
 139                                         GDK_INTERP_BILINEAR);
 140 }
 141
 142 static void
 143 pixbuf_document_finalize (GObject *object)
 144 {
 145         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (object);
 146
 147         g_object_unref (pixbuf_document->pixbuf);
 148
 149         G_OBJECT_CLASS (pixbuf_document_parent_class)->finalize (object);
 150 }
 151
 152 static void
 153 pixbuf_document_set_property (GObject *object,
 154                               guint prop_id,
 155                               const GValue *value,
 156                               GParamSpec *pspec)
 157 {
 158         switch (prop_id)
 159         {
 160                 case PROP_TITLE:
 161                         /* read only */
 162                         break;
 163         }
 164 }
 165
 166 static void
 167 pixbuf_document_get_property (GObject *object,
 168                               guint prop_id,
 169                               GValue *value,
 170                               GParamSpec *pspec)
 171 {
 172         switch (prop_id)
 173         {
 174                 case PROP_TITLE:
 175                         g_value_set_string (value, NULL);
 176                         break;
 177         }
 178 }
 179
 180 static void
 181 pixbuf_document_class_init (PixbufDocumentClass *klass)
 182 {
 183         GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 184
 185         gobject_class->finalize = pixbuf_document_finalize;
 186         gobject_class->get_property = pixbuf_document_get_property;
 187         gobject_class->set_property = pixbuf_document_set_property;
 188
 189         g_object_class_override_property (gobject_class, PROP_TITLE, "title");
 190 }
 191
 192 static char *
 193 pixbuf_document_get_text (EvDocument *document, GdkRectangle *rect)
 194 {
 195         /* FIXME this method should not be in EvDocument */
 196         g_warning ("pixbuf_document_get_text not implemented");
 197         return NULL;
 198 }
 199
 200
 201 static EvLink *
 202 pixbuf_document_get_link (EvDocument *document,
 203                           int         x,
 204                           int         y)
 205 {
 206         return NULL;
 207 }
 208
 209 static void
 210 pixbuf_document_document_iface_init (EvDocumentIface *iface)
 211 {
 212         iface->load = pixbuf_document_load;
 213         iface->save = pixbuf_document_save;
 214         iface->get_text = pixbuf_document_get_text;
 215         iface->get_link = pixbuf_document_get_link;
 216         iface->get_n_pages = pixbuf_document_get_n_pages;
 217         iface->set_page = pixbuf_document_set_page;
 218         iface->get_page = pixbuf_document_get_page;
 219         iface->set_scale = pixbuf_document_set_scale;
 220         iface->get_page_size = pixbuf_document_get_page_size;
 221         iface->render_pixbuf = pixbuf_document_render_pixbuf;
 222 }
 223
 224 static GdkPixbuf *
 225 pixbuf_document_thumbnails_get_thumbnail (EvDocumentThumbnails   *document,
 226                                           gint                    page,
 227                                           gint                    size,
 228                                           gboolean                border)
 229 {
 230         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 231         GdkPixbuf *pixbuf;
 232         gdouble scale_factor;
 233         gint height;
 234
 235         scale_factor = (gdouble)size / gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 236
 237         height = gdk_pixbuf_get_height (pixbuf_document->pixbuf) * scale_factor;
 238
 239         pixbuf = gdk_pixbuf_scale_simple (pixbuf_document->pixbuf, size, height,
 240                                           GDK_INTERP_BILINEAR);
 241
 242         return pixbuf;
 243 }
 244
 245 static void
 246 pixbuf_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
 247                                            gint                  page,
 248                                            gint                  suggested_width,
 249                                            gint                  *width,
 250                                            gint                  *height)
 251 {
 252         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 253         gdouble page_ratio;
 254
 255         page_ratio = ((double)gdk_pixbuf_get_height (pixbuf_document->pixbuf)) /
 256                      gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 257         *width = suggested_width;
 258         *height = (gint) (suggested_width * page_ratio);
 259 }
 260
 261 static void
 262 pixbuf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
 263 {
 264         iface->get_thumbnail = pixbuf_document_thumbnails_get_thumbnail;
 265         iface->get_dimensions = pixbuf_document_thumbnails_get_dimensions;
 266 }
 267
 268
 269 static void
 270 pixbuf_document_init (PixbufDocument *pixbuf_document)
 271 {
 272         pixbuf_document->scale = 1.0;
 273
 274         pixbuf_document->x_offset = 0;
 275         pixbuf_document->y_offset = 0;
 276 }