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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_RENDERER_HOST_DWRITE_FONT_PROXY_IMPL_WIN_H_
#define CONTENT_BROWSER_RENDERER_HOST_DWRITE_FONT_PROXY_IMPL_WIN_H_
#include <dwrite.h>
#include <dwrite_2.h>
#include <dwrite_3.h>
#include <wrl.h>
#include <string>
#include <vector>
#include "base/memory/read_only_shared_memory_region.h"
#include "content/common/content_export.h"
#include "content/public/browser/browser_thread.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "third_party/blink/public/mojom/dwrite_font_proxy/dwrite_font_proxy.mojom.h"
namespace content {
// Implements a message filter that handles the dwrite font proxy messages.
// If DWrite is enabled, calls into the system font collection to obtain
// results. Otherwise, acts as if the system collection contains no fonts.
class CONTENT_EXPORT DWriteFontProxyImpl
: public blink::mojom::DWriteFontProxy {
public:
DWriteFontProxyImpl();
DWriteFontProxyImpl(const DWriteFontProxyImpl&) = delete;
DWriteFontProxyImpl& operator=(const DWriteFontProxyImpl&) = delete;
~DWriteFontProxyImpl() override;
static void Create(
mojo::PendingReceiver<blink::mojom::DWriteFontProxy> receiver);
void SetWindowsFontsPathForTesting(std::u16string path);
// Adds a font to the "system collection" for content_shell tests. Usually
// this is the Ahem.ttf font. The font will report as being `local()` as if
// it was installed on the system. Must be called before any instance of the
// class is instantiated.
static void SideLoadFontForTesting(base::FilePath path);
protected:
// blink::mojom::DWriteFontProxy:
void FindFamily(const std::u16string& family_name,
FindFamilyCallback callback) override;
void GetFamilyCount(GetFamilyCountCallback callback) override;
void GetFamilyNames(uint32_t family_index,
GetFamilyNamesCallback callback) override;
void GetFontFileHandles(uint32_t family_index,
GetFontFileHandlesCallback callback) override;
void MapCharacters(const std::u16string& text,
blink::mojom::DWriteFontStylePtr font_style,
const std::u16string& locale_name,
uint32_t reading_direction,
const std::u16string& base_family_name,
MapCharactersCallback callback) override;
void MatchUniqueFont(const std::u16string& unique_font_name,
MatchUniqueFontCallback callback) override;
void InitializeDirectWrite();
private:
bool IsLastResortFallbackFont(uint32_t font_index);
bool direct_write_initialized_ = false;
Microsoft::WRL::ComPtr<IDWriteFontCollection> collection_;
Microsoft::WRL::ComPtr<IDWriteFactory> factory_;
Microsoft::WRL::ComPtr<IDWriteFactory2> factory2_;
Microsoft::WRL::ComPtr<IDWriteFactory3> factory3_;
Microsoft::WRL::ComPtr<IDWriteFontFallback> font_fallback_;
std::u16string windows_fonts_path_;
base::MappedReadOnlyRegion font_unique_name_table_memory_;
// Temp code to help track down crbug.com/561873
std::vector<uint32_t> last_resort_fonts_;
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_DWRITE_FONT_PROXY_IMPL_WIN_H_
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