pixbuf/pixbuf-document.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
   2 /* pixbuf-document.h: Implementation of EvDocument for PIXBUF
   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
  22 struct _PixbufDocumentClass
  23 {
  24         GObjectClass parent_class;
  25 };
  26
  27 struct _PixbufDocument
  28 {
  29         GObject parent_instance;
  30
  31         GdkPixbuf *pixbuf;
  32         GdkDrawable *target;
  33         gdouble scale;
  34
  35         gint x_offset, y_offset;
  36 };
  37
  38 typedef struct _PixbufDocumentClass PixbufDocumentClass;
  39
  40 static void pixbuf_document_document_iface_init (EvDocumentIface *iface);
  41
  42 G_DEFINE_TYPE_WITH_CODE (PixbufDocument, pixbuf_document, G_TYPE_OBJECT,
  43                          { G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT,
  44                                                   pixbuf_document_document_iface_init) });
  45
  46 static GObjectClass *parent_class;
  47
  48 static gboolean
  49 pixbuf_document_load (EvDocument  *document,
  50                       const char  *uri,
  51                       GError     **error)
  52 {
  53         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
  54
  55         gchar *filename;
  56         GdkPixbuf *pixbuf;
  57
  58         /* FIXME: We could actually load uris  */
  59         filename = g_filename_from_uri (uri, NULL, error);
  60         if (!filename)
  61                 return FALSE;
  62
  63         pixbuf = gdk_pixbuf_new_from_file (filename, error);
  64
  65         if (!pixbuf)
  66                 return FALSE;
  67
  68         pixbuf_document->pixbuf = pixbuf;
  69
  70         return TRUE;
  71 }
  72
  73 static int
  74 pixbuf_document_get_n_pages (EvDocument  *document)
  75 {
  76         return 1;
  77 }
  78
  79 static void
  80 pixbuf_document_set_page (EvDocument  *document,
  81                           int          page)
  82 {
  83         /* Do nothing */
  84 }
  85
  86 static int
  87 pixbuf_document_get_page (EvDocument  *document)
  88 {
  89         return 1;
  90 }
  91
  92 static void
  93 pixbuf_document_set_target (EvDocument  *document,
  94                             GdkDrawable *target)
  95 {
  96         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
  97
  98         pixbuf_document->target = target;
  99 }
 100
 101 static void
 102 pixbuf_document_set_scale (EvDocument  *document,
 103                            double       scale)
 104 {
 105         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 106
 107         pixbuf_document->scale = scale;
 108 }
 109
 110 static void
 111 pixbuf_document_set_page_offset (EvDocument  *document,
 112                               int          x,
 113                               int          y)
 114 {
 115         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 116
 117         pixbuf_document->x_offset = x;
 118         pixbuf_document->y_offset = y;
 119 }
 120
 121 static void
 122 pixbuf_document_get_page_size (EvDocument   *document,
 123                                int          *width,
 124                                int          *height)
 125 {
 126         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 127
 128         *width = gdk_pixbuf_get_width (pixbuf_document->pixbuf);
 129         *height = gdk_pixbuf_get_height (pixbuf_document->pixbuf);
 130 }
 131
 132 static void
 133 pixbuf_document_render (EvDocument  *document,
 134                         int          clip_x,
 135                         int          clip_y,
 136                         int          clip_width,
 137                         int          clip_height)
 138 {
 139         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (document);
 140
 141         if (pixbuf_document->scale == 1.0) {
 142                 gdk_draw_pixbuf (pixbuf_document->target, NULL, pixbuf_document->pixbuf,
 143                                  clip_x, clip_y,
 144                                  clip_x, clip_y,
 145                                  clip_width, clip_height, GDK_RGB_DITHER_NORMAL,
 146                                  0, 0);
 147         }
 148         else {
 149                 GdkPixbuf *tmp_pixbuf;
 150
 151                 tmp_pixbuf = gdk_pixbuf_new (gdk_pixbuf_get_colorspace (pixbuf_document->pixbuf),
 152                                              gdk_pixbuf_get_has_alpha (pixbuf_document->pixbuf),
 153                                              gdk_pixbuf_get_bits_per_sample (pixbuf_document->pixbuf),
 154                                              clip_width, clip_height);
 155
 156                 gdk_pixbuf_scale (pixbuf_document->pixbuf, tmp_pixbuf, 0, 0, clip_width, clip_height,
 157                                   clip_x * pixbuf_document->scale,
 158                                   clip_y * pixbuf_document->scale,
 159                                   pixbuf_document->scale, pixbuf_document->scale,
 160                                   GDK_INTERP_BILINEAR);
 161
 162                 gdk_draw_pixbuf (pixbuf_document->target, NULL, tmp_pixbuf,
 163                                  0, 0,
 164                                  clip_x + pixbuf_document->x_offset,
 165                                  clip_y + pixbuf_document->y_offset,
 166                                  clip_width, clip_height, GDK_RGB_DITHER_NORMAL,
 167                                  0, 0);
 168
 169                 g_object_unref (tmp_pixbuf);
 170         }
 171 }
 172
 173 static void
 174 pixbuf_document_begin_find (EvDocument   *document,
 175                             const char   *search_string,
 176                             gboolean      case_sensitive)
 177 {
 178
 179 }
 180
 181 static void
 182 pixbuf_document_end_find (EvDocument   *document)
 183 {
 184 }
 185
 186 static void
 187 pixbuf_document_finalize (GObject *object)
 188 {
 189         PixbufDocument *pixbuf_document = PIXBUF_DOCUMENT (object);
 190
 191         g_object_unref (pixbuf_document->pixbuf);
 192
 193         G_OBJECT_CLASS (parent_class)->finalize (object);
 194 }
 195
 196 static void
 197 pixbuf_document_class_init (PixbufDocumentClass *klass)
 198 {
 199         GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 200
 201         parent_class = g_type_class_peek_parent (klass);
 202
 203         gobject_class->finalize = pixbuf_document_finalize;
 204 }
 205
 206 static void
 207 pixbuf_document_document_iface_init (EvDocumentIface *iface)
 208 {
 209         iface->load = pixbuf_document_load;
 210         iface->get_n_pages = pixbuf_document_get_n_pages;
 211         iface->set_page = pixbuf_document_set_page;
 212         iface->get_page = pixbuf_document_get_page;
 213         iface->set_scale = pixbuf_document_set_scale;
 214         iface->set_target = pixbuf_document_set_target;
 215         iface->set_page_offset = pixbuf_document_set_page_offset;
 216         iface->get_page_size = pixbuf_document_get_page_size;
 217         iface->render = pixbuf_document_render;
 218         iface->begin_find = pixbuf_document_begin_find;
 219         iface->end_find = pixbuf_document_end_find;
 220 }
 221
 222 static void
 223 pixbuf_document_init (PixbufDocument *pixbuf_document)
 224 {
 225         pixbuf_document->scale = 1.0;
 226
 227         pixbuf_document->x_offset = 10;
 228         pixbuf_document->y_offset = 10;
 229 }