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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 defined(USE_OZONE)
#include "ui/ozone/buildflags.h"
#if BUILDFLAG(OZONE_PLATFORM_X11)
#define USE_OZONE_PLATFORM_X11
#endif
#endif
#if defined(OS_WIN)
#include <dxgi1_6.h>
#endif
#if defined(OS_ANDROID)
#include "base/files/scoped_file.h"
#endif
#if defined(USE_X11) || defined(USE_OZONE_PLATFORM_X11)
#include "ui/gfx/gpu_extra_info.h" // nogncheck
#endif
namespace gl {
class GLApi;
GL_EXPORT void Crash();
GL_EXPORT void Hang();
#if defined(OS_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 defined(OS_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();
#endif
#if (defined(USE_X11) || defined(USE_OZONE_PLATFORM_X11)) && !defined(TOOLKIT_QT)
// Collects the GPU extra info on X11 platforms.
// |enable_native_gpu_memory_buffers| should be taken from GpuPreferences.
// TODO(crbug/1096425) remove this once Ozone is default on Linux.
GL_EXPORT void CollectX11GpuExtraInfo(bool enable_native_gpu_memory_buffer,
gfx::GpuExtraInfo& info);
#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 !defined(OS_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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