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 GObjectClass *parent_class;
  57
  58 static gboolean
  59 pixbuf_document_load (EvDocument  *document,
  60                       const char  *uri,
  61                       GError     **error)
  62 {
  63         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
  64
  65         gchar *filename;
  66         GdkPixbuf *pixbuf;
  67
  68         /* FIXME: We could actually load uris  */
  69         filename = g_filename_from_uri (uri, NULL, error);
  70         if (!filename)
  71                 return FALSE;
  72
  73         pixbuf = gdk_pixbuf_new_from_file (filename, error);
  74
  75         if (!pixbuf)
  76                 return FALSE;
  77
  78         pixbuf_document->pixbuf = pixbuf;
  79
  80         return TRUE;
  81 }
  82
  83 static int
  84 pixbuf_document_get_n_pages (EvDocument  *document)
  85 {
  86         return 1;
  87 }
  88
  89 static void
  90 pixbuf_document_set_page (EvDocument  *document,
  91                           int          page)
  92 {
  93         /* Do nothing */
  94 }
  95
  96 static int
  97 pixbuf_document_get_page (EvDocument  *document)
  98 {
  99         return 1;
 100 }
 101
 102 static void
 103 pixbuf_document_set_target (EvDocument  *document,
 104                             GdkDrawable *target)
 105 {
 106         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 107
 108         pixbuf_document->target = target;
 109 }
 110
 111 static void
 112 pixbuf_document_set_scale (EvDocument  *document,
 113                            double       scale)
 114 {
 115         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 116
 117         pixbuf_document->scale = scale;
 118 }
 119
 120 static void
 121 pixbuf_document_set_page_offset (EvDocument  *document,
 122                               int          x,
 123                               int          y)
 124 {
 125         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 126
 127         pixbuf_document->x_offset = x;
 128         pixbuf_document->y_offset = y;
 129 }
 130
 131 static void
 132 pixbuf_document_get_page_size (EvDocument   *document,
 133                                int          *width,
 134                                int          *height)
 135 {
 136         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 137
 138         *width = gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 139         *height = gdk_pixbuf_get_height (pixbuf_document->pixbuf);
 140 }
 141
 142 static void
 143 pixbuf_document_render (EvDocument  *document,
 144                         int          clip_x,
 145                         int          clip_y,
 146                         int          clip_width,
 147                         int          clip_height)
 148 {
 149         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 150
 151         if (pixbuf_document->scale == 1.0) {
 152                 gdk_draw_pixbuf (pixbuf_document->target, NULL, pixbuf_document->pixbuf,
 153                                  clip_x, clip_y,
 154                                  clip_x, clip_y,
 155                                  clip_width, clip_height, GDK_RGB_DITHER_NORMAL,
 156                                  0, 0);
 157         }
 158         else {
 159                 GdkPixbuf *tmp_pixbuf;
 160
 161                 tmp_pixbuf = gdk_pixbuf_new (gdk_pixbuf_get_colorspace (pixbuf_document->pixbuf),
 162                                              gdk_pixbuf_get_has_alpha (pixbuf_document->pixbuf),
 163                                              gdk_pixbuf_get_bits_per_sample (pixbuf_document->pixbuf),
 164                                              clip_width, clip_height);
 165
 166                 gdk_pixbuf_scale (pixbuf_document->pixbuf, tmp_pixbuf, 0, 0, clip_width, clip_height,
 167                                   clip_x * pixbuf_document->scale,
 168                                   clip_y * pixbuf_document->scale,
 169                                   pixbuf_document->scale, pixbuf_document->scale,
 170                                   GDK_INTERP_BILINEAR);
 171
 172                 gdk_draw_pixbuf (pixbuf_document->target, NULL, tmp_pixbuf,
 173                                  0, 0,
 174                                  clip_x + pixbuf_document->x_offset,
 175                                  clip_y + pixbuf_document->y_offset,
 176                                  clip_width, clip_height, GDK_RGB_DITHER_NORMAL,
 177                                  0, 0);
 178
 179                 g_object_unref (tmp_pixbuf);
 180         }
 181 }
 182
 183 static void
 184 pixbuf_document_finalize (GObject *object)
 185 {
 186         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (object);
 187
 188         g_object_unref (pixbuf_document->pixbuf);
 189
 190         G_OBJECT_CLASS (parent_class)->finalize (object);
 191 }
 192
 193 static void
 194 pixbuf_document_set_property (GObject *object,
 195                               guint prop_id,
 196                               const GValue *value,
 197                               GParamSpec *pspec)
 198 {
 199         switch (prop_id)
 200         {
 201                 case PROP_TITLE:
 202                         /* read only */
 203                         break;
 204         }
 205 }
 206
 207 static void
 208 pixbuf_document_get_property (GObject *object,
 209                               guint prop_id,
 210                               GValue *value,
 211                               GParamSpec *pspec)
 212 {
 213         switch (prop_id)
 214         {
 215                 case PROP_TITLE:
 216                         g_value_set_string (value, NULL);
 217                         break;
 218         }
 219 }
 220
 221 static void
 222 pixbuf_document_class_init (PixbufDocumentClass *klass)
 223 {
 224         GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 225
 226         parent_class = g_type_class_peek_parent (klass);
 227
 228         gobject_class->finalize = pixbuf_document_finalize;
 229         gobject_class->get_property = pixbuf_document_get_property;
 230         gobject_class->set_property = pixbuf_document_set_property;
 231
 232         g_object_class_override_property (gobject_class, PROP_TITLE, "title");
 233 }
 234
 235 static void
 236 pixbuf_document_document_iface_init (EvDocumentIface *iface)
 237 {
 238         iface->load = pixbuf_document_load;
 239         iface->get_n_pages = pixbuf_document_get_n_pages;
 240         iface->set_page = pixbuf_document_set_page;
 241         iface->get_page = pixbuf_document_get_page;
 242         iface->set_scale = pixbuf_document_set_scale;
 243         iface->set_target = pixbuf_document_set_target;
 244         iface->set_page_offset = pixbuf_document_set_page_offset;
 245         iface->get_page_size = pixbuf_document_get_page_size;
 246         iface->render = pixbuf_document_render;
 247 }
 248
 249 static GdkPixbuf *
 250 pixbuf_document_thumbnails_get_thumbnail (EvDocumentThumbnails   *document,
 251                                           gint                   page,
 252                                           gint                   width)
 253 {
 254         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 255         GdkPixbuf *pixbuf;
 256         gdouble scale_factor;
 257         gint height;
 258
 259         scale_factor = (gdouble)width / gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 260
 261         height = gdk_pixbuf_get_height (pixbuf_document->pixbuf) * scale_factor;
 262
 263         pixbuf = gdk_pixbuf_scale_simple (pixbuf_document->pixbuf, width, height,
 264                                           GDK_INTERP_BILINEAR);
 265
 266         return pixbuf;
 267 }
 268
 269
 270 static void
 271 pixbuf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
 272 {
 273         iface->get_thumbnail = pixbuf_document_thumbnails_get_thumbnail;
 274 }
 275
 276
 277 static void
 278 pixbuf_document_init (PixbufDocument *pixbuf_document)
 279 {
 280         pixbuf_document->scale = 1.0;
 281
 282         pixbuf_document->x_offset = 10;
 283         pixbuf_document->y_offset = 10;
 284 }