| // 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 "ui/gl/direct_composition_surface_win.h" |
| #endif |
| |
| #if defined(USE_X11) || defined(USE_OZONE_PLATFORM_X11) |
| #include "ui/base/x/visual_picker_glx.h" // nogncheck |
| #include "ui/gfx/linux/gpu_memory_buffer_support_x11.h" // nogncheck |
| #include "ui/gfx/x/glx.h" // nogncheck |
| #include "ui/gl/gl_implementation.h" // nogncheck |
| #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; |
| } |
| #endif // OS_WIN |
| |
| #if defined(USE_X11) || defined(USE_OZONE_PLATFORM_X11) |
| void CollectX11GpuExtraInfo(bool enable_native_gpu_memory_buffers, |
| gfx::GpuExtraInfo& info) { |
| // TODO(https://crbug.com/1031269): Enable by default. |
| if (enable_native_gpu_memory_buffers) { |
| info.gpu_memory_buffer_support_x11 = |
| ui::GpuMemoryBufferSupportX11::GetInstance()->supported_configs(); |
| } |
| |
| if (GetGLImplementation() == kGLImplementationDesktopGL) { |
| // Create the VisualPickerGlx singleton now while the GbmSupportX11 |
| // singleton is busy being created on another thread. |
| auto* visual_picker = ui::VisualPickerGlx::GetInstance(); |
| |
| // With GLX, only BGR(A) buffer formats are supported. EGL does not have |
| // this restriction. |
| info.gpu_memory_buffer_support_x11.erase( |
| std::remove_if(info.gpu_memory_buffer_support_x11.begin(), |
| info.gpu_memory_buffer_support_x11.end(), |
| [&](gfx::BufferUsageAndFormat usage_and_format) { |
| return visual_picker->GetFbConfigForFormat( |
| usage_and_format.format) == |
| x11::Glx::FbConfig{}; |
| }), |
| info.gpu_memory_buffer_support_x11.end()); |
| } else if (GetGLImplementation() == kGLImplementationEGLANGLE) { |
| // ANGLE does not yet support EGL_EXT_image_dma_buf_import[_modifiers]. |
| info.gpu_memory_buffer_support_x11.clear(); |
| } |
| } |
| #endif // defined(USE_X11) || BUILDFLAG(OZONE_PLATFORM_X11) |
| |
| #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 |