1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "chrome/browser/icon_loader.h"
6
7 #include <gdk-pixbuf/gdk-pixbuf.h>
8 #include <gio/gio.h>
9 #include <gtk/gtk.h>
10
11 #include "base/file_util.h"
12 #include "base/logging.h"
13 #include "base/message_loop.h"
14 #include "base/mime_util.h"
15 #include "base/threading/thread.h"
16 #include "base/string_util.h"
17
SizeToInt(IconLoader::IconSize size)18 static int SizeToInt(IconLoader::IconSize size) {
19 int pixels = 48;
20 if (size == IconLoader::NORMAL)
21 pixels = 32;
22 else if (size == IconLoader::SMALL)
23 pixels = 16;
24
25 return pixels;
26 }
27
ReadIcon()28 void IconLoader::ReadIcon() {
29 filename_ = mime_util::GetMimeIcon(group_, SizeToInt(icon_size_));
30 file_util::ReadFileToString(filename_, &icon_data_);
31 target_message_loop_->PostTask(FROM_HERE,
32 NewRunnableMethod(this, &IconLoader::ParseIcon));
33 }
34
ParseIcon()35 void IconLoader::ParseIcon() {
36 int size = SizeToInt(icon_size_);
37
38 // It would be more convenient to use gdk_pixbuf_new_from_stream_at_scale
39 // but that is only available after 2.14.
40 GdkPixbufLoader* loader = gdk_pixbuf_loader_new();
41 gdk_pixbuf_loader_set_size(loader, size, size);
42 gdk_pixbuf_loader_write(loader,
43 reinterpret_cast<const guchar*>(icon_data_.data()),
44 icon_data_.length(), NULL);
45 gdk_pixbuf_loader_close(loader, NULL);
46 // At this point, the pixbuf is owned by the loader.
47 GdkPixbuf* pixbuf = gdk_pixbuf_loader_get_pixbuf(loader);
48
49 if (pixbuf) {
50 DCHECK_EQ(size, gdk_pixbuf_get_width(pixbuf));
51 DCHECK_EQ(size, gdk_pixbuf_get_height(pixbuf));
52 // Takes ownership of |pixbuf|.
53 g_object_ref(pixbuf);
54 image_.reset(new gfx::Image(pixbuf));
55 } else {
56 LOG(WARNING) << "Unsupported file type or load error: " <<
57 filename_.value();
58 }
59
60 g_object_unref(loader);
61
62 NotifyDelegate();
63 }
64