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// Copyright (c) 2017 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.
// This file contains some useful utilities for the ui/gl classes.
#ifndef UI_GL_GL_UTILS_H_
#define UI_GL_GL_UTILS_H_
#include "base/command_line.h"
#include "build/build_config.h"
#include "ui/gl/gl_export.h"
#if BUILDFLAG(IS_WIN)
#include <dxgi1_6.h>
#endif
#if BUILDFLAG(IS_ANDROID)
#include "base/files/scoped_file.h"
#endif
namespace gl {
class GLApi;
GL_EXPORT void Crash();
GL_EXPORT void Hang();
#if BUILDFLAG(IS_ANDROID)
GL_EXPORT base::ScopedFD MergeFDs(base::ScopedFD a, base::ScopedFD b);
#endif
GL_EXPORT bool UsePassthroughCommandDecoder(
const base::CommandLine* command_line);
GL_EXPORT bool PassthroughCommandDecoderSupported();
#if BUILDFLAG(IS_WIN)
GL_EXPORT bool AreOverlaysSupportedWin();
// Calculates present during in 100 ns from number of frames per second.
GL_EXPORT unsigned int FrameRateToPresentDuration(float frame_rate);
GL_EXPORT UINT GetOverlaySupportFlags(DXGI_FORMAT format);
// BufferCount for the root surface swap chain.
GL_EXPORT unsigned int DirectCompositionRootSurfaceBufferCount();
// Whether to use full damage when direct compostion root surface presents.
// This function is thread safe.
GL_EXPORT bool ShouldForceDirectCompositionRootSurfaceFullDamage();
// Labels swapchain with the name_prefix and ts buffers buffers with the string
// name_prefix + _Buffer_ + <buffer_number>.
void LabelSwapChainAndBuffers(IDXGISwapChain* swap_chain,
const char* name_prefix);
// Same as LabelSwapChainAndBuffers, but only does the buffers. Used for resize
// operations.
void LabelSwapChainBuffers(IDXGISwapChain* swap_chain, const char* name_prefix);
#endif
// Temporarily allows compilation of shaders that use the
// ARB_texture_rectangle/ANGLE_texture_rectangle extension. We don't want to
// expose the extension to WebGL user shaders but we still need to use it for
// parts of the implementation on macOS. Note that the extension is always
// enabled on macOS and this only controls shader compilation.
class GL_EXPORT ScopedEnableTextureRectangleInShaderCompiler {
public:
ScopedEnableTextureRectangleInShaderCompiler(
const ScopedEnableTextureRectangleInShaderCompiler&) = delete;
ScopedEnableTextureRectangleInShaderCompiler& operator=(
const ScopedEnableTextureRectangleInShaderCompiler&) = delete;
// This class is a no-op except on macOS.
#if !BUILDFLAG(IS_MAC)
explicit ScopedEnableTextureRectangleInShaderCompiler(gl::GLApi* gl_api) {}
#else
explicit ScopedEnableTextureRectangleInShaderCompiler(gl::GLApi* gl_api);
~ScopedEnableTextureRectangleInShaderCompiler();
private:
gl::GLApi* gl_api_;
#endif
};
class GL_EXPORT ScopedPixelStore {
public:
ScopedPixelStore(unsigned int name, int value);
~ScopedPixelStore();
ScopedPixelStore(ScopedPixelStore&) = delete;
ScopedPixelStore& operator=(ScopedPixelStore&) = delete;
private:
const unsigned int name_;
const int old_value_;
const int value_;
};
} // namespace gl
#endif // UI_GL_GL_UTILS_H_
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