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// Copyright 2014 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef COBALT_RENDERER_RASTERIZER_SKIA_SOFTWARE_RESOURCE_PROVIDER_H_
#define COBALT_RENDERER_RASTERIZER_SKIA_SOFTWARE_RESOURCE_PROVIDER_H_
#include <memory>
#include <string>
#include <vector>
#include "cobalt/render_tree/resource_provider.h"
#include "cobalt/renderer/rasterizer/skia/text_shaper.h"
#include "third_party/skia/include/core/SkFontMgr.h"
namespace cobalt {
namespace renderer {
namespace rasterizer {
namespace skia {
// This class must be thread-safe and capable of creating resources that
// are to be consumed by this skia software rasterizer.
class SoftwareResourceProvider : public render_tree::ResourceProvider {
public:
explicit SoftwareResourceProvider(bool purge_skia_font_caches_on_destruction);
~SoftwareResourceProvider() override;
base::TypeId GetTypeId() const override {
return base::GetTypeId<SoftwareResourceProvider>();
}
void Finish() override{};
bool PixelFormatSupported(render_tree::PixelFormat pixel_format) override;
bool AlphaFormatSupported(render_tree::AlphaFormat alpha_format) override;
std::unique_ptr<render_tree::ImageData> AllocateImageData(
const math::Size& size, render_tree::PixelFormat pixel_format,
render_tree::AlphaFormat alpha_format) override;
scoped_refptr<render_tree::Image> CreateImage(
std::unique_ptr<render_tree::ImageData> pixel_data) override;
scoped_refptr<render_tree::Image> CreateImageFromSbDecodeTarget(
SbDecodeTarget decode_target) override {
NOTREACHED();
SbDecodeTargetRelease(decode_target);
return NULL;
}
SbDecodeTargetGraphicsContextProvider*
GetSbDecodeTargetGraphicsContextProvider() override {
return NULL;
}
bool SupportsSbDecodeTarget() override { return false; }
std::unique_ptr<render_tree::RawImageMemory> AllocateRawImageMemory(
size_t size_in_bytes, size_t alignment) override;
scoped_refptr<render_tree::Image> CreateMultiPlaneImageFromRawMemory(
std::unique_ptr<render_tree::RawImageMemory> raw_image_memory,
const render_tree::MultiPlaneImageDataDescriptor& descriptor) override;
bool HasLocalFontFamily(const char* font_family_name) const override;
scoped_refptr<render_tree::Typeface> GetLocalTypeface(
const char* font_family_name, render_tree::FontStyle font_style) override;
scoped_refptr<render_tree::Typeface> GetLocalTypefaceByFaceNameIfAvailable(
const char* font_face_name) override;
scoped_refptr<render_tree::Typeface> GetCharacterFallbackTypeface(
int32 character, render_tree::FontStyle font_style,
const std::string& language) override;
// This resource provider uses ots (OpenTypeSanitizer) to sanitize the raw
// typeface data and skia to generate the typeface. It supports TrueType,
// OpenType, and WOFF data formats.
scoped_refptr<render_tree::Typeface> CreateTypefaceFromRawData(
std::unique_ptr<render_tree::ResourceProvider::RawTypefaceDataVector>
raw_data,
std::string* error_string) override;
scoped_refptr<render_tree::GlyphBuffer> CreateGlyphBuffer(
const base::char16* text_buffer, size_t text_length,
const std::string& language, bool is_rtl,
render_tree::FontProvider* font_provider) override;
scoped_refptr<render_tree::GlyphBuffer> CreateGlyphBuffer(
const std::string& utf8_string,
const scoped_refptr<render_tree::Font>& font) override;
float GetTextWidth(const base::char16* text_buffer, size_t text_length,
const std::string& language, bool is_rtl,
render_tree::FontProvider* font_provider,
render_tree::FontVector* maybe_used_fonts) override;
scoped_refptr<render_tree::LottieAnimation> CreateLottieAnimation(
const char* data, size_t length) override;
scoped_refptr<render_tree::Mesh> CreateMesh(
std::unique_ptr<std::vector<render_tree::Mesh::Vertex> > vertices,
render_tree::Mesh::DrawMode draw_mode) override;
scoped_refptr<render_tree::Image> DrawOffscreenImage(
const scoped_refptr<render_tree::Node>& root) override;
private:
const bool purge_skia_font_caches_on_destruction_;
TextShaper text_shaper_;
};
} // namespace skia
} // namespace rasterizer
} // namespace renderer
} // namespace cobalt
#endif // COBALT_RENDERER_RASTERIZER_SKIA_SOFTWARE_RESOURCE_PROVIDER_H_