| // 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. |
| |
| #include "ui/gl/gl_utils.h" |
| |
| #include "base/command_line.h" |
| #include "base/debug/alias.h" |
| #include "base/logging.h" |
| #include "ui/gl/gl_bindings.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 defined(OS_ANDROID) |
| #include "base/posix/eintr_wrapper.h" |
| #include "third_party/libsync/src/include/sync/sync.h" |
| #endif |
| |
| #if defined(OS_WIN) |
| #include <d3d11_1.h> |
| #include "base/strings/stringprintf.h" |
| #include "media/base/win/mf_helpers.h" |
| #include "ui/gl/direct_composition_surface_win.h" |
| #endif |
| |
| namespace gl { |
| namespace { |
| |
| 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 defined(OS_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 (switch_value == kCmdDecoderPassthroughName) { |
| return true; |
| } else if (switch_value == kCmdDecoderValidatingName) { |
| return false; |
| } else { |
| // Unrecognized or missing switch, use the default. |
| return features::UsePassthroughCommandDecoder(); |
| } |
| } |
| |
| bool PassthroughCommandDecoderSupported() { |
| #if defined(USE_EGL) |
| // Using the passthrough command buffer requires that specific ANGLE |
| // extensions are exposed |
| return gl::GLSurfaceEGL::IsCreateContextBindGeneratesResourceSupported() && |
| gl::GLSurfaceEGL::IsCreateContextWebGLCompatabilitySupported() && |
| gl::GLSurfaceEGL::IsRobustResourceInitSupported() && |
| gl::GLSurfaceEGL::IsDisplayTextureShareGroupSupported() && |
| gl::GLSurfaceEGL::IsCreateContextClientArraysSupported(); |
| #else |
| // The passthrough command buffer is only supported on top of ANGLE/EGL |
| return false; |
| #endif // defined(USE_EGL) |
| } |
| |
| #if defined(OS_WIN) |
| // This function is thread safe. |
| bool AreOverlaysSupportedWin() { |
| return gl::DirectCompositionSurfaceWin::AreOverlaysSupported(); |
| } |
| |
| 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); |
| } |
| |
| UINT GetOverlaySupportFlags(DXGI_FORMAT format) { |
| return gl::DirectCompositionSurfaceWin::GetOverlaySupportFlags(format); |
| } |
| |
| unsigned int DirectCompositionRootSurfaceBufferCount() { |
| return base::FeatureList::IsEnabled(features::kDCompTripleBufferRootSwapChain) |
| ? 3u |
| : 2u; |
| } |
| |
| bool ShouldForceDirectCompositionRootSurfaceFullDamage() { |
| static bool should_force = []() { |
| const base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess(); |
| if (cmd_line->HasSwitch( |
| switches::kDirectCompositionForceFullDamageForTesting)) { |
| return true; |
| } |
| UINT brga_flags = DirectCompositionSurfaceWin::GetOverlaySupportFlags( |
| DXGI_FORMAT_B8G8R8A8_UNORM); |
| constexpr UINT kSupportBits = |
| DXGI_OVERLAY_SUPPORT_FLAG_DIRECT | DXGI_OVERLAY_SUPPORT_FLAG_SCALING; |
| if ((brga_flags & kSupportBits) == 0) |
| return false; |
| if (!base::FeatureList::IsEnabled( |
| features::kDirectCompositionForceFullDamage)) { |
| return false; |
| } |
| return true; |
| }(); |
| return should_force; |
| } |
| |
| // 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 = media::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) { |
| media::SetDebugName(swap_chain, name_prefix); |
| LabelSwapChainBuffers(swap_chain, name_prefix); |
| } |
| #endif // OS_WIN |
| |
| #if defined(OS_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 // defined(OS_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 |