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// Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/common/resource_bundle.h"
#include "base/gfx/png_decoder.h"
#include "base/logging.h"
#include "base/string_piece.h"
#include "net/base/file_stream.h"
#include "net/base/net_errors.h"
#include "chrome/common/gfx/chrome_font.h"
#include "SkBitmap.h"
ResourceBundle* ResourceBundle::g_shared_instance_ = NULL;
/* static */
void ResourceBundle::InitSharedInstance(const std::wstring& pref_locale) {
DCHECK(g_shared_instance_ == NULL) << "ResourceBundle initialized twice";
g_shared_instance_ = new ResourceBundle();
g_shared_instance_->LoadResources(pref_locale);
}
/* static */
void ResourceBundle::CleanupSharedInstance() {
if (g_shared_instance_) {
delete g_shared_instance_;
g_shared_instance_ = NULL;
}
}
/* static */
ResourceBundle& ResourceBundle::GetSharedInstance() {
// Must call InitSharedInstance before this function.
CHECK(g_shared_instance_ != NULL);
return *g_shared_instance_;
}
ResourceBundle::ResourceBundle()
: resources_data_(NULL),
locale_resources_data_(NULL),
theme_data_(NULL) {
}
void ResourceBundle::FreeImages() {
for (SkImageMap::iterator i = skia_images_.begin();
i != skia_images_.end(); i++) {
delete i->second;
}
skia_images_.clear();
}
void ResourceBundle::SetThemeExtension(const Extension& e) {
theme_extension_.reset(new Extension(e));
}
/* static */
SkBitmap* ResourceBundle::LoadBitmap(DataHandle data_handle, int resource_id) {
std::vector<unsigned char> raw_data, png_data;
bool success = false;
// First check to see if we have a registered theme extension and whether
// it can handle this resource.
// TODO(erikkay): It would be nice to use something less brittle than
// resource_id here.
if (g_shared_instance_->theme_extension_.get()) {
FilePath path =
g_shared_instance_->theme_extension_->GetThemeResourcePath(resource_id);
if (!path.empty()) {
net::FileStream file;
int flags = base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_READ;
if (file.Open(path, flags) == net::OK) {
int64 avail = file.Available();
if (avail > 0 && avail < INT_MAX) {
size_t size = static_cast<size_t>(avail);
raw_data.resize(size);
char* data = reinterpret_cast<char*>(&(raw_data.front()));
if (file.ReadUntilComplete(data, size) == avail) {
success= true;
} else {
raw_data.resize(0);
}
}
}
}
}
if (!success)
success = LoadResourceBytes(data_handle, resource_id, &raw_data);
if (!success)
return NULL;
// Decode the PNG.
int image_width;
int image_height;
if (!PNGDecoder::Decode(&raw_data.front(), raw_data.size(),
PNGDecoder::FORMAT_BGRA,
&png_data, &image_width, &image_height)) {
NOTREACHED() << "Unable to decode image resource " << resource_id;
return NULL;
}
return PNGDecoder::CreateSkBitmapFromBGRAFormat(png_data,
image_width,
image_height);
}
std::string ResourceBundle::GetDataResource(int resource_id) {
return GetRawDataResource(resource_id).as_string();
}
bool ResourceBundle::LoadImageResourceBytes(int resource_id,
std::vector<unsigned char>* bytes) {
return LoadResourceBytes(theme_data_, resource_id, bytes);
}
bool ResourceBundle::LoadDataResourceBytes(int resource_id,
std::vector<unsigned char>* bytes) {
return LoadResourceBytes(resources_data_, resource_id, bytes);
}
SkBitmap* ResourceBundle::GetBitmapNamed(int resource_id) {
// Check to see if we already have the Skia image in the cache.
{
AutoLock lock_scope(lock_);
SkImageMap::const_iterator found = skia_images_.find(resource_id);
if (found != skia_images_.end())
return found->second;
}
scoped_ptr<SkBitmap> bitmap;
if (theme_data_)
bitmap.reset(LoadBitmap(theme_data_, resource_id));
// If we did not find the bitmap in the theme DLL, try the current one.
if (!bitmap.get())
bitmap.reset(LoadBitmap(resources_data_, resource_id));
// We loaded successfully. Cache the Skia version of the bitmap.
if (bitmap.get()) {
AutoLock lock_scope(lock_);
// Another thread raced us, and has already cached the skia image.
if (skia_images_.count(resource_id))
return skia_images_[resource_id];
skia_images_[resource_id] = bitmap.get();
return bitmap.release();
}
// We failed to retrieve the bitmap, show a debugging red square.
{
LOG(WARNING) << "Unable to load bitmap with id " << resource_id;
NOTREACHED(); // Want to assert in debug mode.
AutoLock lock_scope(lock_); // Guard empty_bitmap initialization.
static SkBitmap* empty_bitmap = NULL;
if (!empty_bitmap) {
// The placeholder bitmap is bright red so people notice the problem.
// This bitmap will be leaked, but this code should never be hit.
empty_bitmap = new SkBitmap();
empty_bitmap->setConfig(SkBitmap::kARGB_8888_Config, 32, 32);
empty_bitmap->allocPixels();
empty_bitmap->eraseARGB(255, 255, 0, 0);
}
return empty_bitmap;
}
}
void ResourceBundle::LoadFontsIfNecessary() {
AutoLock lock_scope(lock_);
if (!base_font_.get()) {
base_font_.reset(new ChromeFont());
small_font_.reset(new ChromeFont());
*small_font_ = base_font_->DeriveFont(-2);
medium_font_.reset(new ChromeFont());
*medium_font_ = base_font_->DeriveFont(3);
medium_bold_font_.reset(new ChromeFont());
*medium_bold_font_ =
base_font_->DeriveFont(3, base_font_->style() | ChromeFont::BOLD);
large_font_.reset(new ChromeFont());
*large_font_ = base_font_->DeriveFont(8);
web_font_.reset(new ChromeFont());
*web_font_ = base_font_->DeriveFont(1,
base_font_->style() | ChromeFont::WEB);
}
}
ChromeFont ResourceBundle::GetFont(FontStyle style) {
LoadFontsIfNecessary();
switch(style) {
case SmallFont:
return *small_font_;
case MediumFont:
return *medium_font_;
case MediumBoldFont:
return *medium_bold_font_;
case LargeFont:
return *large_font_;
case WebFont:
return *web_font_;
default:
return *base_font_;
}
}
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