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 gboolean
  84 pixbuf_document_save (EvDocument  *document,
  85                       const char  *uri,
  86                       GError     **error)
  87 {
  88         g_warning ("pixbuf_document_save not implemented"); /* FIXME */
  89         return TRUE;
  90 }
  91
  92 static int
  93 pixbuf_document_get_n_pages (EvDocument  *document)
  94 {
  95         return 1;
  96 }
  97
  98 static void
  99 pixbuf_document_set_page (EvDocument  *document,
 100                           int          page)
 101 {
 102         /* Do nothing */
 103 }
 104
 105 static int
 106 pixbuf_document_get_page (EvDocument  *document)
 107 {
 108         return 1;
 109 }
 110
 111 static void
 112 pixbuf_document_set_target (EvDocument  *document,
 113                             GdkDrawable *target)
 114 {
 115         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 116
 117         pixbuf_document->target = target;
 118 }
 119
 120 static void
 121 pixbuf_document_set_scale (EvDocument  *document,
 122                            double       scale)
 123 {
 124         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 125
 126         pixbuf_document->scale = scale;
 127 }
 128
 129 static void
 130 pixbuf_document_set_page_offset (EvDocument  *document,
 131                               int          x,
 132                               int          y)
 133 {
 134         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 135
 136         pixbuf_document->x_offset = x;
 137         pixbuf_document->y_offset = y;
 138 }
 139
 140 static void
 141 pixbuf_document_get_page_size (EvDocument   *document,
 142                                int          *width,
 143                                int          *height)
 144 {
 145         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 146
 147         if (width)
 148                 *width = gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 149         if (height)
 150                 *height = gdk_pixbuf_get_height (pixbuf_document->pixbuf);
 151 }
 152
 153 static void
 154 pixbuf_document_render (EvDocument  *document,
 155                         int          clip_x,
 156                         int          clip_y,
 157                         int          clip_width,
 158                         int          clip_height)
 159 {
 160         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 161
 162         if (pixbuf_document->scale == 1.0) {
 163                 gdk_draw_pixbuf (pixbuf_document->target, NULL, pixbuf_document->pixbuf,
 164                                  clip_x, clip_y,
 165                                  clip_x, clip_y,
 166                                  clip_width, clip_height, GDK_RGB_DITHER_NORMAL,
 167                                  0, 0);
 168         }
 169         else {
 170                 GdkPixbuf *tmp_pixbuf;
 171
 172                 tmp_pixbuf = gdk_pixbuf_new (gdk_pixbuf_get_colorspace (pixbuf_document->pixbuf),
 173                                              gdk_pixbuf_get_has_alpha (pixbuf_document->pixbuf),
 174                                              gdk_pixbuf_get_bits_per_sample (pixbuf_document->pixbuf),
 175                                              clip_width, clip_height);
 176
 177                 gdk_pixbuf_scale (pixbuf_document->pixbuf, tmp_pixbuf, 0, 0, clip_width, clip_height,
 178                                   clip_x * pixbuf_document->scale,
 179                                   clip_y * pixbuf_document->scale,
 180                                   pixbuf_document->scale, pixbuf_document->scale,
 181                                   GDK_INTERP_BILINEAR);
 182
 183                 gdk_draw_pixbuf (pixbuf_document->target, NULL, tmp_pixbuf,
 184                                  0, 0,
 185                                  clip_x + pixbuf_document->x_offset,
 186                                  clip_y + pixbuf_document->y_offset,
 187                                  clip_width, clip_height, GDK_RGB_DITHER_NORMAL,
 188                                  0, 0);
 189
 190                 g_object_unref (tmp_pixbuf);
 191         }
 192 }
 193
 194 static void
 195 pixbuf_document_finalize (GObject *object)
 196 {
 197         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (object);
 198
 199         g_object_unref (pixbuf_document->pixbuf);
 200
 201         G_OBJECT_CLASS (parent_class)->finalize (object);
 202 }
 203
 204 static void
 205 pixbuf_document_set_property (GObject *object,
 206                               guint prop_id,
 207                               const GValue *value,
 208                               GParamSpec *pspec)
 209 {
 210         switch (prop_id)
 211         {
 212                 case PROP_TITLE:
 213                         /* read only */
 214                         break;
 215         }
 216 }
 217
 218 static void
 219 pixbuf_document_get_property (GObject *object,
 220                               guint prop_id,
 221                               GValue *value,
 222                               GParamSpec *pspec)
 223 {
 224         switch (prop_id)
 225         {
 226                 case PROP_TITLE:
 227                         g_value_set_string (value, NULL);
 228                         break;
 229         }
 230 }
 231
 232 static void
 233 pixbuf_document_class_init (PixbufDocumentClass *klass)
 234 {
 235         GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 236
 237         parent_class = g_type_class_peek_parent (klass);
 238
 239         gobject_class->finalize = pixbuf_document_finalize;
 240         gobject_class->get_property = pixbuf_document_get_property;
 241         gobject_class->set_property = pixbuf_document_set_property;
 242
 243         g_object_class_override_property (gobject_class, PROP_TITLE, "title");
 244 }
 245
 246 static char *
 247 pixbuf_document_get_text (EvDocument *document, GdkRectangle *rect)
 248 {
 249         /* FIXME this method should not be in EvDocument */
 250         g_warning ("pixbuf_document_get_text not implemented");
 251         return NULL;
 252 }
 253
 254
 255 static EvLink *
 256 pixbuf_document_get_link (EvDocument *document,
 257                           int         x,
 258                           int         y)
 259 {
 260         return NULL;
 261 }
 262
 263 static void
 264 pixbuf_document_document_iface_init (EvDocumentIface *iface)
 265 {
 266         iface->load = pixbuf_document_load;
 267         iface->save = pixbuf_document_save;
 268         iface->get_text = pixbuf_document_get_text;
 269         iface->get_link = pixbuf_document_get_link;
 270         iface->get_n_pages = pixbuf_document_get_n_pages;
 271         iface->set_page = pixbuf_document_set_page;
 272         iface->get_page = pixbuf_document_get_page;
 273         iface->set_scale = pixbuf_document_set_scale;
 274         iface->set_target = pixbuf_document_set_target;
 275         iface->set_page_offset = pixbuf_document_set_page_offset;
 276         iface->get_page_size = pixbuf_document_get_page_size;
 277         iface->render = pixbuf_document_render;
 278 }
 279
 280 static GdkPixbuf *
 281 pixbuf_document_thumbnails_get_thumbnail (EvDocumentThumbnails   *document,
 282                                           gint                   page,
 283                                           gint                   width)
 284 {
 285         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 286         GdkPixbuf *pixbuf;
 287         gdouble scale_factor;
 288         gint height;
 289
 290         scale_factor = (gdouble)width / gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 291
 292         height = gdk_pixbuf_get_height (pixbuf_document->pixbuf) * scale_factor;
 293
 294         pixbuf = gdk_pixbuf_scale_simple (pixbuf_document->pixbuf, width, height,
 295                                           GDK_INTERP_BILINEAR);
 296
 297         return pixbuf;
 298 }
 299
 300 static void
 301 pixbuf_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
 302                                            gint                  page,
 303                                            gint                  suggested_width,
 304                                            gint                  *width,
 305                                            gint                  *height)
 306 {
 307         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 308         gdouble page_ratio;
 309
 310         page_ratio = ((double)gdk_pixbuf_get_height (pixbuf_document->pixbuf)) /
 311                      gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 312         *width = suggested_width;
 313         *height = (gint) (suggested_width * page_ratio);
 314 }
 315
 316 static void
 317 pixbuf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
 318 {
 319         iface->get_thumbnail = pixbuf_document_thumbnails_get_thumbnail;
 320         iface->get_dimensions = pixbuf_document_thumbnails_get_dimensions;
 321 }
 322
 323
 324 static void
 325 pixbuf_document_init (PixbufDocument *pixbuf_document)
 326 {
 327         pixbuf_document->scale = 1.0;
 328
 329         pixbuf_document->x_offset = 10;
 330         pixbuf_document->y_offset = 10;
 331 }