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 struct _PixbufDocumentClass
  24 {
  25         GObjectClass parent_class;
  26 };
  27
  28 struct _PixbufDocument
  29 {
  30         GObject parent_instance;
  31
  32         GdkPixbuf *pixbuf;
  33         GdkDrawable *target;
  34         gdouble scale;
  35
  36         gint x_offset, y_offset;
  37 };
  38
  39 typedef struct _PixbufDocumentClass PixbufDocumentClass;
  40
  41 static void pixbuf_document_document_iface_init (EvDocumentIface *iface);
  42 static void pixbuf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface);
  43
  44 G_DEFINE_TYPE_WITH_CODE (PixbufDocument, pixbuf_document, G_TYPE_OBJECT,
  45                          { G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT,
  46                                                   pixbuf_document_document_iface_init);
  47                          G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
  48                                                 pixbuf_document_document_thumbnails_iface_init)
  49                                    });
  50
  51 static GObjectClass *parent_class;
  52
  53 static gboolean
  54 pixbuf_document_load (EvDocument  *document,
  55                       const char  *uri,
  56                       GError     **error)
  57 {
  58         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
  59
  60         gchar *filename;
  61         GdkPixbuf *pixbuf;
  62
  63         /* FIXME: We could actually load uris  */
  64         filename = g_filename_from_uri (uri, NULL, error);
  65         if (!filename)
  66                 return FALSE;
  67
  68         pixbuf = gdk_pixbuf_new_from_file (filename, error);
  69
  70         if (!pixbuf)
  71                 return FALSE;
  72
  73         pixbuf_document->pixbuf = pixbuf;
  74
  75         return TRUE;
  76 }
  77
  78 static int
  79 pixbuf_document_get_n_pages (EvDocument  *document)
  80 {
  81         return 1;
  82 }
  83
  84 static void
  85 pixbuf_document_set_page (EvDocument  *document,
  86                           int          page)
  87 {
  88         /* Do nothing */
  89 }
  90
  91 static int
  92 pixbuf_document_get_page (EvDocument  *document)
  93 {
  94         return 1;
  95 }
  96
  97 static void
  98 pixbuf_document_set_target (EvDocument  *document,
  99                             GdkDrawable *target)
 100 {
 101         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 102
 103         pixbuf_document->target = target;
 104 }
 105
 106 static void
 107 pixbuf_document_set_scale (EvDocument  *document,
 108                            double       scale)
 109 {
 110         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 111
 112         pixbuf_document->scale = scale;
 113 }
 114
 115 static void
 116 pixbuf_document_set_page_offset (EvDocument  *document,
 117                               int          x,
 118                               int          y)
 119 {
 120         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 121
 122         pixbuf_document->x_offset = x;
 123         pixbuf_document->y_offset = y;
 124 }
 125
 126 static void
 127 pixbuf_document_get_page_size (EvDocument   *document,
 128                                int          *width,
 129                                int          *height)
 130 {
 131         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 132
 133         *width = gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 134         *height = gdk_pixbuf_get_height (pixbuf_document->pixbuf);
 135 }
 136
 137 static void
 138 pixbuf_document_render (EvDocument  *document,
 139                         int          clip_x,
 140                         int          clip_y,
 141                         int          clip_width,
 142                         int          clip_height)
 143 {
 144         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 145
 146         if (pixbuf_document->scale == 1.0) {
 147                 gdk_draw_pixbuf (pixbuf_document->target, NULL, pixbuf_document->pixbuf,
 148                                  clip_x, clip_y,
 149                                  clip_x, clip_y,
 150                                  clip_width, clip_height, GDK_RGB_DITHER_NORMAL,
 151                                  0, 0);
 152         }
 153         else {
 154                 GdkPixbuf *tmp_pixbuf;
 155
 156                 tmp_pixbuf = gdk_pixbuf_new (gdk_pixbuf_get_colorspace (pixbuf_document->pixbuf),
 157                                              gdk_pixbuf_get_has_alpha (pixbuf_document->pixbuf),
 158                                              gdk_pixbuf_get_bits_per_sample (pixbuf_document->pixbuf),
 159                                              clip_width, clip_height);
 160
 161                 gdk_pixbuf_scale (pixbuf_document->pixbuf, tmp_pixbuf, 0, 0, clip_width, clip_height,
 162                                   clip_x * pixbuf_document->scale,
 163                                   clip_y * pixbuf_document->scale,
 164                                   pixbuf_document->scale, pixbuf_document->scale,
 165                                   GDK_INTERP_BILINEAR);
 166
 167                 gdk_draw_pixbuf (pixbuf_document->target, NULL, tmp_pixbuf,
 168                                  0, 0,
 169                                  clip_x + pixbuf_document->x_offset,
 170                                  clip_y + pixbuf_document->y_offset,
 171                                  clip_width, clip_height, GDK_RGB_DITHER_NORMAL,
 172                                  0, 0);
 173
 174                 g_object_unref (tmp_pixbuf);
 175         }
 176 }
 177
 178 static void
 179 pixbuf_document_begin_find (EvDocument   *document,
 180                             const char   *search_string,
 181                             gboolean      case_sensitive)
 182 {
 183
 184 }
 185
 186 static void
 187 pixbuf_document_end_find (EvDocument   *document)
 188 {
 189 }
 190
 191 static void
 192 pixbuf_document_finalize (GObject *object)
 193 {
 194         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (object);
 195
 196         g_object_unref (pixbuf_document->pixbuf);
 197
 198         G_OBJECT_CLASS (parent_class)->finalize (object);
 199 }
 200
 201 static void
 202 pixbuf_document_class_init (PixbufDocumentClass *klass)
 203 {
 204         GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 205
 206         parent_class = g_type_class_peek_parent (klass);
 207
 208         gobject_class->finalize = pixbuf_document_finalize;
 209 }
 210
 211 static void
 212 pixbuf_document_document_iface_init (EvDocumentIface *iface)
 213 {
 214         iface->load = pixbuf_document_load;
 215         iface->get_n_pages = pixbuf_document_get_n_pages;
 216         iface->set_page = pixbuf_document_set_page;
 217         iface->get_page = pixbuf_document_get_page;
 218         iface->set_scale = pixbuf_document_set_scale;
 219         iface->set_target = pixbuf_document_set_target;
 220         iface->set_page_offset = pixbuf_document_set_page_offset;
 221         iface->get_page_size = pixbuf_document_get_page_size;
 222         iface->render = pixbuf_document_render;
 223         iface->begin_find = pixbuf_document_begin_find;
 224         iface->end_find = pixbuf_document_end_find;
 225 }
 226
 227 static GdkPixbuf *
 228 pixbuf_document_thumbnails_get_thumbnail (EvDocumentThumbnails   *document,
 229                                           gint                   page,
 230                                           gint                   width)
 231 {
 232         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 233         GdkPixbuf *pixbuf;
 234         gdouble scale_factor;
 235         gint height;
 236
 237         scale_factor = (gdouble)width / gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 238
 239         height = gdk_pixbuf_get_height (pixbuf_document->pixbuf) * scale_factor;
 240
 241         pixbuf = gdk_pixbuf_scale_simple (pixbuf_document->pixbuf, width, height,
 242                                           GDK_INTERP_BILINEAR);
 243
 244         return pixbuf;
 245 }
 246
 247
 248 static void
 249 pixbuf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
 250 {
 251         iface->get_thumbnail = pixbuf_document_thumbnails_get_thumbnail;
 252 }
 253
 254
 255 static void
 256 pixbuf_document_init (PixbufDocument *pixbuf_document)
 257 {
 258         pixbuf_document->scale = 1.0;
 259
 260         pixbuf_document->x_offset = 10;
 261         pixbuf_document->y_offset = 10;
 262 }