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_target (EvDocument  *document,
 111                             GdkDrawable *target)
 112 {
 113         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 114
 115         pixbuf_document->target = target;
 116 }
 117
 118 static void
 119 pixbuf_document_set_scale (EvDocument  *document,
 120                            double       scale)
 121 {
 122         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 123
 124         pixbuf_document->scale = scale;
 125 }
 126
 127 static void
 128 pixbuf_document_set_page_offset (EvDocument  *document,
 129                               int          x,
 130                               int          y)
 131 {
 132         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 133
 134         pixbuf_document->x_offset = x;
 135         pixbuf_document->y_offset = y;
 136 }
 137
 138 static void
 139 pixbuf_document_get_page_size (EvDocument   *document,
 140                                int           page,
 141                                int          *width,
 142                                int          *height)
 143 {
 144         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 145
 146         if (width)
 147                 *width = gdk_pixbuf_get_width (pixbuf_document->pixbuf) * pixbuf_document->scale;
 148         if (height)
 149                 *height = gdk_pixbuf_get_height (pixbuf_document->pixbuf) * pixbuf_document->scale;
 150 }
 151
 152 static void
 153 pixbuf_document_render (EvDocument  *document,
 154                         int          clip_x,
 155                         int          clip_y,
 156                         int          clip_width,
 157                         int          clip_height)
 158 {
 159         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 160         GdkPixbuf *tmp_pixbuf;
 161
 162         tmp_pixbuf = gdk_pixbuf_new (gdk_pixbuf_get_colorspace (pixbuf_document->pixbuf),
 163                                      gdk_pixbuf_get_has_alpha (pixbuf_document->pixbuf),
 164                                      gdk_pixbuf_get_bits_per_sample (pixbuf_document->pixbuf),
 165                                      clip_width, clip_height);
 166
 167         gdk_pixbuf_fill (tmp_pixbuf, 0xffffffff);
 168         gdk_pixbuf_scale (pixbuf_document->pixbuf, tmp_pixbuf, 0, 0,
 169                           MIN(gdk_pixbuf_get_width(pixbuf_document->pixbuf)* pixbuf_document->scale-clip_x, clip_width),
 170                           MIN(gdk_pixbuf_get_height(pixbuf_document->pixbuf)* pixbuf_document->scale-clip_y, clip_height),
 171                           -clip_x, -clip_y,
 172                           pixbuf_document->scale, pixbuf_document->scale,
 173                           GDK_INTERP_BILINEAR);
 174
 175         gdk_draw_pixbuf (pixbuf_document->target, NULL, tmp_pixbuf,
 176                          0, 0,
 177                          clip_x, clip_y,
 178                          clip_width, clip_height, GDK_RGB_DITHER_NORMAL,
 179                          0, 0);
 180
 181         g_object_unref (tmp_pixbuf);
 182 }
 183
 184 static void
 185 pixbuf_document_finalize (GObject *object)
 186 {
 187         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (object);
 188
 189         g_object_unref (pixbuf_document->pixbuf);
 190
 191         G_OBJECT_CLASS (pixbuf_document_parent_class)->finalize (object);
 192 }
 193
 194 static void
 195 pixbuf_document_set_property (GObject *object,
 196                               guint prop_id,
 197                               const GValue *value,
 198                               GParamSpec *pspec)
 199 {
 200         switch (prop_id)
 201         {
 202                 case PROP_TITLE:
 203                         /* read only */
 204                         break;
 205         }
 206 }
 207
 208 static void
 209 pixbuf_document_get_property (GObject *object,
 210                               guint prop_id,
 211                               GValue *value,
 212                               GParamSpec *pspec)
 213 {
 214         switch (prop_id)
 215         {
 216                 case PROP_TITLE:
 217                         g_value_set_string (value, NULL);
 218                         break;
 219         }
 220 }
 221
 222 static void
 223 pixbuf_document_class_init (PixbufDocumentClass *klass)
 224 {
 225         GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 226
 227         gobject_class->finalize = pixbuf_document_finalize;
 228         gobject_class->get_property = pixbuf_document_get_property;
 229         gobject_class->set_property = pixbuf_document_set_property;
 230
 231         g_object_class_override_property (gobject_class, PROP_TITLE, "title");
 232 }
 233
 234 static char *
 235 pixbuf_document_get_text (EvDocument *document, GdkRectangle *rect)
 236 {
 237         /* FIXME this method should not be in EvDocument */
 238         g_warning ("pixbuf_document_get_text not implemented");
 239         return NULL;
 240 }
 241
 242
 243 static EvLink *
 244 pixbuf_document_get_link (EvDocument *document,
 245                           int         x,
 246                           int         y)
 247 {
 248         return NULL;
 249 }
 250
 251 static void
 252 pixbuf_document_document_iface_init (EvDocumentIface *iface)
 253 {
 254         iface->load = pixbuf_document_load;
 255         iface->save = pixbuf_document_save;
 256         iface->get_text = pixbuf_document_get_text;
 257         iface->get_link = pixbuf_document_get_link;
 258         iface->get_n_pages = pixbuf_document_get_n_pages;
 259         iface->set_page = pixbuf_document_set_page;
 260         iface->get_page = pixbuf_document_get_page;
 261         iface->set_scale = pixbuf_document_set_scale;
 262         iface->set_target = pixbuf_document_set_target;
 263         iface->set_page_offset = pixbuf_document_set_page_offset;
 264         iface->get_page_size = pixbuf_document_get_page_size;
 265         iface->render = pixbuf_document_render;
 266 }
 267
 268 static GdkPixbuf *
 269 pixbuf_document_thumbnails_get_thumbnail (EvDocumentThumbnails   *document,
 270                                           gint                   page,
 271                                           gint                   width)
 272 {
 273         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 274         GdkPixbuf *pixbuf;
 275         gdouble scale_factor;
 276         gint height;
 277
 278         scale_factor = (gdouble)width / gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 279
 280         height = gdk_pixbuf_get_height (pixbuf_document->pixbuf) * scale_factor;
 281
 282         pixbuf = gdk_pixbuf_scale_simple (pixbuf_document->pixbuf, width, height,
 283                                           GDK_INTERP_BILINEAR);
 284
 285         return pixbuf;
 286 }
 287
 288 static void
 289 pixbuf_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
 290                                            gint                  page,
 291                                            gint                  suggested_width,
 292                                            gint                  *width,
 293                                            gint                  *height)
 294 {
 295         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 296         gdouble page_ratio;
 297
 298         page_ratio = ((double)gdk_pixbuf_get_height (pixbuf_document->pixbuf)) /
 299                      gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 300         *width = suggested_width;
 301         *height = (gint) (suggested_width * page_ratio);
 302 }
 303
 304 static void
 305 pixbuf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
 306 {
 307         iface->get_thumbnail = pixbuf_document_thumbnails_get_thumbnail;
 308         iface->get_dimensions = pixbuf_document_thumbnails_get_dimensions;
 309 }
 310
 311
 312 static void
 313 pixbuf_document_init (PixbufDocument *pixbuf_document)
 314 {
 315         pixbuf_document->scale = 1.0;
 316
 317         pixbuf_document->x_offset = 0;
 318         pixbuf_document->y_offset = 0;
 319 }