chrome/browser/themes/theme_service_gtk.cc

   1 // Copyright (c) 2012 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 "base/memory/scoped_ptr.h"
  12 #include "third_party/skia/include/core/SkBitmap.h"
  13 #include "ui/gfx/gtk_util.h"
  14 #include "ui/gfx/image/image.h"
  15
  16 GdkPixbuf* ThemeService::GetRTLEnabledPixbufNamed(int id) const {
  17   return GetPixbufImpl(id, true);
  18 }
  19
  20 GdkPixbuf* ThemeService::GetPixbufImpl(int id, bool rtl_enabled) const {
  21   DCHECK(CalledOnValidThread());
  22   // Use the negative |resource_id| for the key for BIDI-aware images.
  23   int key = rtl_enabled ? -id : id;
  24
  25   // Check to see if we already have the pixbuf in the cache.
  26   GdkPixbufMap::const_iterator pixbufs_iter = gdk_pixbufs_.find(key);
  27   if (pixbufs_iter != gdk_pixbufs_.end())
  28     return pixbufs_iter->second;
  29
  30   SkBitmap bitmap = GetImageNamed(id).AsBitmap();
  31   GdkPixbuf* pixbuf = gfx::GdkPixbufFromSkBitmap(bitmap);
  32
  33   // We loaded successfully.  Cache the pixbuf.
  34   if (pixbuf) {
  35     if (base::i18n::IsRTL() && rtl_enabled) {
  36       GdkPixbuf* original_pixbuf = pixbuf;
  37       pixbuf = gdk_pixbuf_flip(pixbuf, TRUE);
  38       g_object_unref(original_pixbuf);
  39     }
  40
  41     gdk_pixbufs_[key] = pixbuf;
  42     return pixbuf;
  43   }
  44
  45   // We failed to retrieve the bitmap, show a debugging red square.
  46   LOG(WARNING) << "Unable to load GdkPixbuf with id " << id;
  47   NOTREACHED();  // Want to assert in debug mode.
  48
  49   static GdkPixbuf* empty_bitmap = NULL;
  50   if (!empty_bitmap) {
  51     // The placeholder bitmap is bright red so people notice the problem.
  52     SkBitmap skia_bitmap;
  53     skia_bitmap.setConfig(SkBitmap::kARGB_8888_Config, 32, 32);
  54     skia_bitmap.allocPixels();
  55     skia_bitmap.eraseARGB(255, 255, 0, 0);
  56     empty_bitmap = gfx::GdkPixbufFromSkBitmap(skia_bitmap);
  57   }
  58   return empty_bitmap;
  59 }
  60
  61 void ThemeService::FreePlatformCaches() {
  62   DCHECK(CalledOnValidThread());
  63
  64   // Free GdkPixbufs.
  65   for (GdkPixbufMap::iterator i = gdk_pixbufs_.begin();
  66        i != gdk_pixbufs_.end(); i++) {
  67     g_object_unref(i->second);
  68   }
  69   gdk_pixbufs_.clear();
  70 }