summaryrefslogtreecommitdiff
path: root/gtk/gtkcssimageurl.c
blob: 341f8cfd4a9e2a86eaad39f8addd9b42a4fc7a5a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
/*
 * Copyright © 2011 Red Hat Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
 *
 * Authors: Benjamin Otte <otte@gnome.org>
 */

#include "config.h"

#include <string.h>

#include "gtkcssimageurlprivate.h"
#include "gtkcssimagesurfaceprivate.h"

G_DEFINE_TYPE (GtkCssImageUrl, _gtk_css_image_url, GTK_TYPE_CSS_IMAGE)

static GtkCssImage *
gtk_css_image_url_load_image (GtkCssImageUrl *url)
{
  GdkPixbuf *pixbuf;
  GError *error = NULL;
  GFileInputStream *input;

  if (url->loaded_image)
    return url->loaded_image;

  /* We special case resources here so we can use
     gdk_pixbuf_new_from_resource, which in turn has some special casing
     for GdkPixdata files to avoid duplicating the memory for the pixbufs */
  if (g_file_has_uri_scheme (url->file, "resource"))
    {
      char *uri = g_file_get_uri (url->file);
      char *resource_path = g_uri_unescape_string (uri + strlen ("resource://"), NULL);

      pixbuf = gdk_pixbuf_new_from_resource (resource_path, &error);
      g_free (resource_path);
      g_free (uri);
    }
  else
    {
      input = g_file_read (url->file, NULL, &error);
      if (input != NULL)
	{
          pixbuf = gdk_pixbuf_new_from_stream (G_INPUT_STREAM (input), NULL, &error);
          g_object_unref (input);
	}
      else
        {
          pixbuf = NULL;
        }
    }

  if (pixbuf == NULL)
    {
      cairo_surface_t *empty = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 0, 0);
      char *uri;

      /* XXX: Can we get the error somehow sent to the CssProvider?
       * I don't like just dumping it to stderr or losing it completely. */
      uri = g_file_get_uri (url->file);
      g_warning ("Error loading image '%s': %s", uri, error->message);
      g_error_free (error);
      g_free (uri);
      url->loaded_image = _gtk_css_image_surface_new (empty);
      cairo_surface_destroy (empty);
      return url->loaded_image; 
    }

  url->loaded_image = _gtk_css_image_surface_new_for_pixbuf (pixbuf);
  g_object_unref (pixbuf);

  return url->loaded_image;
}

static int
gtk_css_image_url_get_width (GtkCssImage *image)
{
  GtkCssImageUrl *url = GTK_CSS_IMAGE_URL (image);

  return _gtk_css_image_get_width (gtk_css_image_url_load_image (url));
}

static int
gtk_css_image_url_get_height (GtkCssImage *image)
{
  GtkCssImageUrl *url = GTK_CSS_IMAGE_URL (image);

  return _gtk_css_image_get_height (gtk_css_image_url_load_image (url));
}

static double
gtk_css_image_url_get_aspect_ratio (GtkCssImage *image)
{
  GtkCssImageUrl *url = GTK_CSS_IMAGE_URL (image);

  return _gtk_css_image_get_aspect_ratio (gtk_css_image_url_load_image (url));
}

static void
gtk_css_image_url_draw (GtkCssImage        *image,
                        cairo_t            *cr,
                        double              width,
                        double              height)
{
  GtkCssImageUrl *url = GTK_CSS_IMAGE_URL (image);

  _gtk_css_image_draw (gtk_css_image_url_load_image (url), cr, width, height);
}

static GtkCssImage *
gtk_css_image_url_compute (GtkCssImage             *image,
                           guint                    property_id,
                           GtkStyleProviderPrivate *provider,
                           GtkCssStyle             *style,
                           GtkCssStyle             *parent_style)
{
  GtkCssImageUrl *url = GTK_CSS_IMAGE_URL (image);

  return g_object_ref (gtk_css_image_url_load_image (url));
}

static gboolean
gtk_css_image_url_parse (GtkCssImage  *image,
                         GtkCssParser *parser)
{
  GtkCssImageUrl *url = GTK_CSS_IMAGE_URL (image);

  url->file = _gtk_css_parser_read_url (parser);
  if (url->file == NULL)
    return FALSE;

  return TRUE;
}

static void
gtk_css_image_url_print (GtkCssImage *image,
                         GString     *string)
{
  GtkCssImageUrl *url = GTK_CSS_IMAGE_URL (image);

  _gtk_css_image_print (gtk_css_image_url_load_image (url), string);
}

static void
gtk_css_image_url_dispose (GObject *object)
{
  GtkCssImageUrl *url = GTK_CSS_IMAGE_URL (object);

  g_clear_object (&url->file);
  g_clear_object (&url->loaded_image);

  G_OBJECT_CLASS (_gtk_css_image_url_parent_class)->dispose (object);
}

static void
_gtk_css_image_url_class_init (GtkCssImageUrlClass *klass)
{
  GtkCssImageClass *image_class = GTK_CSS_IMAGE_CLASS (klass);
  GObjectClass *object_class = G_OBJECT_CLASS (klass);

  image_class->get_width = gtk_css_image_url_get_width;
  image_class->get_height = gtk_css_image_url_get_height;
  image_class->get_aspect_ratio = gtk_css_image_url_get_aspect_ratio;
  image_class->compute = gtk_css_image_url_compute;
  image_class->draw = gtk_css_image_url_draw;
  image_class->parse = gtk_css_image_url_parse;
  image_class->print = gtk_css_image_url_print;

  object_class->dispose = gtk_css_image_url_dispose;
}

static void
_gtk_css_image_url_init (GtkCssImageUrl *image_url)
{
}