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          *width,
 141                                int          *height)
 142 {
 143         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 144
 145         if (width)
 146                 *width = gdk_pixbuf_get_width (pixbuf_document->pixbuf) * pixbuf_document->scale;
 147         if (height)
 148                 *height = gdk_pixbuf_get_height (pixbuf_document->pixbuf) * pixbuf_document->scale;
 149 }
 150
 151 static void
 152 pixbuf_document_render (EvDocument  *document,
 153                         int          clip_x,
 154                         int          clip_y,
 155                         int          clip_width,
 156                         int          clip_height)
 157 {
 158         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 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_fill (tmp_pixbuf, 0xffffffff);
 167         gdk_pixbuf_scale (pixbuf_document->pixbuf, tmp_pixbuf, 0, 0,
 168                           MIN(gdk_pixbuf_get_width(pixbuf_document->pixbuf)* pixbuf_document->scale-clip_x, clip_width),
 169                           MIN(gdk_pixbuf_get_height(pixbuf_document->pixbuf)* pixbuf_document->scale-clip_y, clip_height),
 170                           -clip_x, -clip_y,
 171                           pixbuf_document->scale, pixbuf_document->scale,
 172                           GDK_INTERP_BILINEAR);
 173
 174         gdk_draw_pixbuf (pixbuf_document->target, NULL, tmp_pixbuf,
 175                          0, 0,
 176                          clip_x, clip_y,
 177                          clip_width, clip_height, GDK_RGB_DITHER_NORMAL,
 178                          0, 0);
 179
 180         g_object_unref (tmp_pixbuf);
 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 (pixbuf_document_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         gobject_class->finalize = pixbuf_document_finalize;
 227         gobject_class->get_property = pixbuf_document_get_property;
 228         gobject_class->set_property = pixbuf_document_set_property;
 229
 230         g_object_class_override_property (gobject_class, PROP_TITLE, "title");
 231 }
 232
 233 static char *
 234 pixbuf_document_get_text (EvDocument *document, GdkRectangle *rect)
 235 {
 236         /* FIXME this method should not be in EvDocument */
 237         g_warning ("pixbuf_document_get_text not implemented");
 238         return NULL;
 239 }
 240
 241
 242 static EvLink *
 243 pixbuf_document_get_link (EvDocument *document,
 244                           int         x,
 245                           int         y)
 246 {
 247         return NULL;
 248 }
 249
 250 static void
 251 pixbuf_document_document_iface_init (EvDocumentIface *iface)
 252 {
 253         iface->load = pixbuf_document_load;
 254         iface->save = pixbuf_document_save;
 255         iface->get_text = pixbuf_document_get_text;
 256         iface->get_link = pixbuf_document_get_link;
 257         iface->get_n_pages = pixbuf_document_get_n_pages;
 258         iface->set_page = pixbuf_document_set_page;
 259         iface->get_page = pixbuf_document_get_page;
 260         iface->set_scale = pixbuf_document_set_scale;
 261         iface->set_target = pixbuf_document_set_target;
 262         iface->set_page_offset = pixbuf_document_set_page_offset;
 263         iface->get_page_size = pixbuf_document_get_page_size;
 264         iface->render = pixbuf_document_render;
 265 }
 266
 267 static GdkPixbuf *
 268 pixbuf_document_thumbnails_get_thumbnail (EvDocumentThumbnails   *document,
 269                                           gint                   page,
 270                                           gint                   width)
 271 {
 272         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 273         GdkPixbuf *pixbuf;
 274         gdouble scale_factor;
 275         gint height;
 276
 277         scale_factor = (gdouble)width / gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 278
 279         height = gdk_pixbuf_get_height (pixbuf_document->pixbuf) * scale_factor;
 280
 281         pixbuf = gdk_pixbuf_scale_simple (pixbuf_document->pixbuf, width, height,
 282                                           GDK_INTERP_BILINEAR);
 283
 284         return pixbuf;
 285 }
 286
 287 static void
 288 pixbuf_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
 289                                            gint                  page,
 290                                            gint                  suggested_width,
 291                                            gint                  *width,
 292                                            gint                  *height)
 293 {
 294         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 295         gdouble page_ratio;
 296
 297         page_ratio = ((double)gdk_pixbuf_get_height (pixbuf_document->pixbuf)) /
 298                      gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 299         *width = suggested_width;
 300         *height = (gint) (suggested_width * page_ratio);
 301 }
 302
 303 static void
 304 pixbuf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
 305 {
 306         iface->get_thumbnail = pixbuf_document_thumbnails_get_thumbnail;
 307         iface->get_dimensions = pixbuf_document_thumbnails_get_dimensions;
 308 }
 309
 310
 311 static void
 312 pixbuf_document_init (PixbufDocument *pixbuf_document)
 313 {
 314         pixbuf_document->scale = 1.0;
 315
 316         pixbuf_document->x_offset = 0;
 317         pixbuf_document->y_offset = 0;
 318 }