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/themes/theme_service.h"
6
7#include <gdk-pixbuf/gdk-pixbuf.h>
8
9#include "base/i18n/rtl.h"
10#include "base/logging.h"
11#include "third_party/skia/include/core/SkBitmap.h"
12#include "ui/gfx/gtk_util.h"
13
14GdkPixbuf* ThemeService::GetPixbufNamed(int id) const {
15  return GetPixbufImpl(id, false);
16}
17
18GdkPixbuf* ThemeService::GetRTLEnabledPixbufNamed(int id) const {
19  return GetPixbufImpl(id, true);
20}
21
22GdkPixbuf* ThemeService::GetPixbufImpl(int id, bool rtl_enabled) const {
23  DCHECK(CalledOnValidThread());
24  // Use the negative |resource_id| for the key for BIDI-aware images.
25  int key = rtl_enabled ? -id : id;
26
27  // Check to see if we already have the pixbuf in the cache.
28  GdkPixbufMap::const_iterator pixbufs_iter = gdk_pixbufs_.find(key);
29  if (pixbufs_iter != gdk_pixbufs_.end())
30    return pixbufs_iter->second;
31
32  SkBitmap* bitmap = GetBitmapNamed(id);
33  GdkPixbuf* pixbuf = gfx::GdkPixbufFromSkBitmap(bitmap);
34
35  // We loaded successfully.  Cache the pixbuf.
36  if (pixbuf) {
37    if (base::i18n::IsRTL() && rtl_enabled) {
38      GdkPixbuf* original_pixbuf = pixbuf;
39      pixbuf = gdk_pixbuf_flip(pixbuf, TRUE);
40      g_object_unref(original_pixbuf);
41    }
42
43    gdk_pixbufs_[key] = pixbuf;
44    return pixbuf;
45  }
46
47  // We failed to retrieve the bitmap, show a debugging red square.
48  LOG(WARNING) << "Unable to load GdkPixbuf with id " << id;
49  NOTREACHED();  // Want to assert in debug mode.
50
51  static GdkPixbuf* empty_bitmap = NULL;
52  if (!empty_bitmap) {
53    // The placeholder bitmap is bright red so people notice the problem.
54    // This bitmap will be leaked, but this code should never be hit.
55    scoped_ptr<SkBitmap> skia_bitmap(new SkBitmap());
56    skia_bitmap->setConfig(SkBitmap::kARGB_8888_Config, 32, 32);
57    skia_bitmap->allocPixels();
58    skia_bitmap->eraseARGB(255, 255, 0, 0);
59    empty_bitmap = gfx::GdkPixbufFromSkBitmap(skia_bitmap.get());
60  }
61  return empty_bitmap;
62}
63
64void ThemeService::FreePlatformCaches() {
65  DCHECK(CalledOnValidThread());
66
67  // Free GdkPixbufs.
68  for (GdkPixbufMap::iterator i = gdk_pixbufs_.begin();
69       i != gdk_pixbufs_.end(); i++) {
70    g_object_unref(i->second);
71  }
72  gdk_pixbufs_.clear();
73}
74