| // Copyright 2017 The Chromium Authors |
| // 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. |
| |
| #include "ui/gl/gl_utils.h" |
| |
| #include "base/command_line.h" |
| #include "base/debug/alias.h" |
| #include "base/logging.h" |
| #include "build/build_config.h" |
| #include "ui/gl/gl_bindings.h" |
| #include "ui/gl/gl_display_manager.h" |
| #include "ui/gl/gl_features.h" |
| #include "ui/gl/gl_switches.h" |
| |
| #if defined(USE_EGL) |
| #include "ui/gl/gl_surface_egl.h" |
| #endif // defined(USE_EGL) |
| |
| #if BUILDFLAG(IS_ANDROID) |
| #include "base/posix/eintr_wrapper.h" |
| #include "third_party/libsync/src/include/sync/sync.h" |
| #endif |
| |
| #if BUILDFLAG(IS_WIN) |
| #include <d3d11_1.h> |
| #include "base/strings/stringprintf.h" |
| #include "ui/gl/debug_utils.h" |
| #include "ui/gl/direct_composition_support.h" |
| #endif |
| |
| namespace gl { |
| namespace { |
| |
| // The global set of workarounds. |
| GlWorkarounds g_workarounds; |
| |
| int GetIntegerv(unsigned int name) { |
| int value = 0; |
| glGetIntegerv(name, &value); |
| return value; |
| } |
| |
| } // namespace |
| |
| // Used by chrome://gpucrash and gpu_benchmarking_extension's |
| // CrashForTesting. |
| void Crash() { |
| DVLOG(1) << "GPU: Simulating GPU crash"; |
| // Good bye, cruel world. |
| volatile int* it_s_the_end_of_the_world_as_we_know_it = nullptr; |
| *it_s_the_end_of_the_world_as_we_know_it = 0xdead; |
| } |
| |
| // Used by chrome://gpuhang. |
| void Hang() { |
| DVLOG(1) << "GPU: Simulating GPU hang"; |
| int do_not_delete_me = 0; |
| for (;;) { |
| // Do not sleep here. The GPU watchdog timer tracks |
| // the amount of user time this thread is using and |
| // it doesn't use much while calling Sleep. |
| |
| // The following are multiple mechanisms to prevent compilers from |
| // optimizing out the endless loop. Hope at least one of them works. |
| base::debug::Alias(&do_not_delete_me); |
| ++do_not_delete_me; |
| |
| __asm__ volatile(""); |
| } |
| } |
| |
| #if BUILDFLAG(IS_ANDROID) |
| base::ScopedFD MergeFDs(base::ScopedFD a, base::ScopedFD b) { |
| if (!a.is_valid()) |
| return b; |
| if (!b.is_valid()) |
| return a; |
| |
| base::ScopedFD merged(HANDLE_EINTR(sync_merge("", a.get(), b.get()))); |
| if (!merged.is_valid()) |
| LOG(ERROR) << "Failed to merge fences."; |
| return merged; |
| } |
| #endif |
| |
| bool UsePassthroughCommandDecoder(const base::CommandLine* command_line) { |
| std::string switch_value; |
| if (command_line->HasSwitch(switches::kUseCmdDecoder)) { |
| switch_value = command_line->GetSwitchValueASCII(switches::kUseCmdDecoder); |
| } |
| |
| #if !BUILDFLAG(ENABLE_VALIDATING_COMMAND_DECODER) |
| if (switch_value == kCmdDecoderValidatingName) { |
| LOG(WARNING) << "Ignoring request for the validating command decoder. It " |
| "is not supported on this platform."; |
| } |
| return true; |
| #else |
| if (switch_value == kCmdDecoderPassthroughName) { |
| return true; |
| } else if (switch_value == kCmdDecoderValidatingName) { |
| return false; |
| } else { |
| // Unrecognized or missing switch, use the default. |
| return features::UsePassthroughCommandDecoder(); |
| } |
| #endif // !BUILDFLAG(ENABLE_VALIDATING_COMMAND_DECODER) |
| } |
| |
| bool PassthroughCommandDecoderSupported() { |
| #if defined(USE_EGL) |
| GLDisplayEGL* display = gl::GLSurfaceEGL::GetGLDisplayEGL(); |
| // Using the passthrough command buffer requires that specific ANGLE |
| // extensions are exposed |
| return display->ext->b_EGL_CHROMIUM_create_context_bind_generates_resource && |
| display->ext->b_EGL_ANGLE_create_context_webgl_compatibility && |
| display->ext->b_EGL_ANGLE_robust_resource_initialization && |
| display->ext->b_EGL_ANGLE_display_texture_share_group && |
| display->ext->b_EGL_ANGLE_create_context_client_arrays; |
| #else |
| // The passthrough command buffer is only supported on top of ANGLE/EGL |
| return false; |
| #endif // defined(USE_EGL) |
| } |
| |
| const GlWorkarounds& GetGlWorkarounds() { |
| return g_workarounds; |
| } |
| |
| void SetGlWorkarounds(const GlWorkarounds& workarounds) { |
| g_workarounds = workarounds; |
| } |
| |
| #if BUILDFLAG(IS_WIN) |
| unsigned int FrameRateToPresentDuration(float frame_rate) { |
| if (frame_rate == 0) |
| return 0u; |
| // Present duration unit is 100 ns. |
| return static_cast<unsigned int>(1.0E7 / frame_rate); |
| } |
| |
| unsigned int DirectCompositionRootSurfaceBufferCount() { |
| return base::FeatureList::IsEnabled(features::kDCompTripleBufferRootSwapChain) |
| ? 3u |
| : 2u; |
| } |
| |
| // Labels swapchain buffers with the string name_prefix + _Buffer_ + |
| // <buffer_number> |
| void LabelSwapChainBuffers(IDXGISwapChain* swap_chain, |
| const char* name_prefix) { |
| DXGI_SWAP_CHAIN_DESC desc; |
| HRESULT hr = swap_chain->GetDesc(&desc); |
| if (FAILED(hr)) { |
| DLOG(ERROR) << "Failed to GetDesc from swap chain: " |
| << logging::SystemErrorCodeToString(hr); |
| return; |
| } |
| for (unsigned int i = 0; i < desc.BufferCount; i++) { |
| Microsoft::WRL::ComPtr<ID3D11Texture2D> swap_chain_buffer; |
| hr = swap_chain->GetBuffer(i, IID_PPV_ARGS(&swap_chain_buffer)); |
| if (FAILED(hr)) { |
| DLOG(ERROR) << "GetBuffer on swap chain buffer " << i |
| << "failed: " << logging::SystemErrorCodeToString(hr); |
| return; |
| } |
| const std::string buffer_name = |
| base::StringPrintf("%s_Buffer_%d", name_prefix, i); |
| hr = SetDebugName(swap_chain_buffer.Get(), buffer_name.c_str()); |
| if (FAILED(hr)) { |
| DLOG(ERROR) << "Failed to label swap chain buffer " << i << ": " |
| << logging::SystemErrorCodeToString(hr); |
| } |
| } |
| } |
| |
| // Same as LabelSwapChainAndBuffers, but only does the buffers. Used for resize |
| // operations |
| void LabelSwapChainAndBuffers(IDXGISwapChain* swap_chain, |
| const char* name_prefix) { |
| SetDebugName(swap_chain, name_prefix); |
| LabelSwapChainBuffers(swap_chain, name_prefix); |
| } |
| #endif // BUILDFLAG(IS_WIN) |
| |
| GLDisplay* GetDisplay(GpuPreference gpu_preference) { |
| return GetDisplay(gpu_preference, gl::DisplayKey::kDefault); |
| } |
| |
| GL_EXPORT GLDisplay* GetDisplay(GpuPreference gpu_preference, |
| gl::DisplayKey display_key) { |
| #if defined(USE_GLX) |
| if (!GLDisplayManagerX11::GetInstance()->IsEmpty()) { |
| return GLDisplayManagerX11::GetInstance()->GetDisplay(gpu_preference, |
| display_key); |
| } |
| #endif |
| #if defined(USE_EGL) |
| return GLDisplayManagerEGL::GetInstance()->GetDisplay(gpu_preference, |
| display_key); |
| #endif |
| NOTREACHED(); |
| return nullptr; |
| } |
| |
| GLDisplay* GetDefaultDisplay() { |
| return GetDisplay(GpuPreference::kDefault); |
| } |
| |
| #if defined(USE_EGL) |
| void SetGpuPreferenceEGL(GpuPreference preference, uint64_t system_device_id) { |
| GLDisplayManagerEGL::GetInstance()->SetGpuPreference(preference, |
| system_device_id); |
| } |
| |
| void RemoveGpuPreferenceEGL(GpuPreference preference) { |
| GLDisplayManagerEGL::GetInstance()->RemoveGpuPreference(preference); |
| } |
| |
| GLDisplayEGL* GetDefaultDisplayEGL() { |
| return GLDisplayManagerEGL::GetInstance()->GetDisplay( |
| GpuPreference::kDefault); |
| } |
| |
| GLDisplayEGL* GetDisplayEGL(GpuPreference gpu_preference) { |
| return GLDisplayManagerEGL::GetInstance()->GetDisplay(gpu_preference); |
| } |
| #endif // USE_EGL |
| |
| #if BUILDFLAG(IS_MAC) |
| |
| ScopedEnableTextureRectangleInShaderCompiler:: |
| ScopedEnableTextureRectangleInShaderCompiler(gl::GLApi* gl_api) { |
| if (gl_api) { |
| DCHECK(!gl_api->glIsEnabledFn(GL_TEXTURE_RECTANGLE_ANGLE)); |
| gl_api->glEnableFn(GL_TEXTURE_RECTANGLE_ANGLE); |
| gl_api_ = gl_api; |
| } else { |
| gl_api_ = nullptr; // Signal to the destructor that this is a no-op. |
| } |
| } |
| |
| ScopedEnableTextureRectangleInShaderCompiler:: |
| ~ScopedEnableTextureRectangleInShaderCompiler() { |
| if (gl_api_) |
| gl_api_->glDisableFn(GL_TEXTURE_RECTANGLE_ANGLE); |
| } |
| |
| #endif // BUILDFLAG(IS_MAC) |
| |
| ScopedPixelStore::ScopedPixelStore(unsigned int name, int value) |
| : name_(name), old_value_(GetIntegerv(name)), value_(value) { |
| if (value_ != old_value_) |
| glPixelStorei(name_, value_); |
| } |
| |
| ScopedPixelStore::~ScopedPixelStore() { |
| if (value_ != old_value_) |
| glPixelStorei(name_, old_value_); |
| } |
| |
| } // namespace gl |