Pileus Git - ~andy/gtk/blob - gtk/gtkcssimageurl.c

   1 /*
   2  * Copyright © 2011 Red Hat Inc.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library. If not, see <http://www.gnu.org/licenses/>.
  16  *
  17  * Authors: Benjamin Otte <otte@gnome.org>
  18  */
  19
  20 #include "config.h"
  21
  22 #include <string.h>
  23
  24 #include "gtkcssimageurlprivate.h"
  25 #include "gtkcssimagesurfaceprivate.h"
  26
  27 G_DEFINE_TYPE (GtkCssImageUrl, _gtk_css_image_url, GTK_TYPE_CSS_IMAGE)
  28
  29 static int
  30 gtk_css_image_url_get_width (GtkCssImage *image)
  31 {
  32   GtkCssImageUrl *url = GTK_CSS_IMAGE_URL (image);
  33
  34   return _gtk_css_image_get_width (url->loaded_image);
  35 }
  36
  37 static int
  38 gtk_css_image_url_get_height (GtkCssImage *image)
  39 {
  40   GtkCssImageUrl *url = GTK_CSS_IMAGE_URL (image);
  41
  42   return _gtk_css_image_get_height (url->loaded_image);
  43 }
  44
  45 static double
  46 gtk_css_image_url_get_aspect_ratio (GtkCssImage *image)
  47 {
  48   GtkCssImageUrl *url = GTK_CSS_IMAGE_URL (image);
  49
  50   return _gtk_css_image_get_aspect_ratio (url->loaded_image);
  51 }
  52
  53 static void
  54 gtk_css_image_url_draw (GtkCssImage        *image,
  55                         cairo_t            *cr,
  56                         double              width,
  57                         double              height)
  58 {
  59   GtkCssImageUrl *url = GTK_CSS_IMAGE_URL (image);
  60
  61   _gtk_css_image_draw (url->loaded_image, cr, width, height);
  62 }
  63
  64 static gboolean
  65 gtk_css_image_url_parse (GtkCssImage  *image,
  66                          GtkCssParser *parser)
  67 {
  68   GtkCssImageUrl *url = GTK_CSS_IMAGE_URL (image);
  69   GdkPixbuf *pixbuf;
  70   GError *error = NULL;
  71   GFileInputStream *input;
  72
  73   url->file = _gtk_css_parser_read_url (parser);
  74   if (url->file == NULL)
  75     return FALSE;
  76
  77   /* We special case resources here so we can use
  78      gdk_pixbuf_new_from_resource, which in turn has some special casing
  79      for GdkPixdata files to avoid duplicating the memory for the pixbufs */
  80   if (g_file_has_uri_scheme (url->file, "resource"))
  81     {
  82       char *uri = g_file_get_uri (url->file);
  83       char *resource_path = g_uri_unescape_string (uri + strlen ("resource://"), NULL);
  84
  85       pixbuf = gdk_pixbuf_new_from_resource (resource_path, &error);
  86       g_free (resource_path);
  87       g_free (uri);
  88     }
  89   else
  90     {
  91       input = g_file_read (url->file, NULL, &error);
  92       if (input == NULL)
  93         {
  94           _gtk_css_parser_take_error (parser, error);
  95           return FALSE;
  96         }
  97
  98       pixbuf = gdk_pixbuf_new_from_stream (G_INPUT_STREAM (input), NULL, &error);
  99       g_object_unref (input);
 100     }
 101
 102   if (pixbuf == NULL)
 103     {
 104       _gtk_css_parser_take_error (parser, error);
 105       return FALSE;
 106     }
 107
 108   url->loaded_image = _gtk_css_image_surface_new_for_pixbuf (pixbuf);
 109   g_object_unref (pixbuf);
 110
 111   return TRUE;
 112 }
 113
 114 static void
 115 gtk_css_image_url_print (GtkCssImage *image,
 116                          GString     *string)
 117 {
 118   GtkCssImageUrl *url = GTK_CSS_IMAGE_URL (image);
 119
 120   _gtk_css_image_print (url->loaded_image, string);
 121 }
 122
 123 static void
 124 gtk_css_image_url_dispose (GObject *object)
 125 {
 126   GtkCssImageUrl *url = GTK_CSS_IMAGE_URL (object);
 127
 128   g_clear_object (&url->file);
 129   g_clear_object (&url->loaded_image);
 130
 131   G_OBJECT_CLASS (_gtk_css_image_url_parent_class)->dispose (object);
 132 }
 133
 134 static void
 135 _gtk_css_image_url_class_init (GtkCssImageUrlClass *klass)
 136 {
 137   GtkCssImageClass *image_class = GTK_CSS_IMAGE_CLASS (klass);
 138   GObjectClass *object_class = G_OBJECT_CLASS (klass);
 139
 140   image_class->get_width = gtk_css_image_url_get_width;
 141   image_class->get_height = gtk_css_image_url_get_height;
 142   image_class->get_aspect_ratio = gtk_css_image_url_get_aspect_ratio;
 143   image_class->draw = gtk_css_image_url_draw;
 144   image_class->parse = gtk_css_image_url_parse;
 145   image_class->print = gtk_css_image_url_print;
 146
 147   object_class->dispose = gtk_css_image_url_dispose;
 148 }
 149
 150 static void
 151 _gtk_css_image_url_init (GtkCssImageUrl *image_url)
 152 {
 153 }
 154