Add HDR support to DirectCompositionSurfaceWin.

gpu/ipc/service/direct_composition_surface_win.cc

 // Copyright 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.
 
 #include "gpu/ipc/service/direct_composition_surface_win.h"
 
 #include "base/optional.h"
 #include "base/synchronization/waitable_event.h"
 #include "gpu/ipc/service/gpu_channel_manager.h"
 #include "gpu/ipc/service/gpu_channel_manager_delegate.h"
 #include "gpu/ipc/service/switches.h"
+#include "ui/base/ui_base_switches.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gl/egl_util.h"
 #include "ui/gl/gl_angle_util_win.h"
 #include "ui/gl/gl_context.h"
 #include "ui/gl/gl_surface_egl.h"
 #include "ui/gl/scoped_make_current.h"
 
 #ifndef EGL_ANGLE_flexible_surface_compatibility
 #define EGL_ANGLE_flexible_surface_compatibility 1
 #define EGL_FLEXIBLE_SURFACE_COMPATIBILITY_SUPPORTED_ANGLE 0x33A6
@@ skipping 138 matching lines @@
 
 void DirectCompositionSurfaceWin::ReleaseCurrentSurface() {
   ReleaseDrawTexture(true);
   dcomp_surface_.Release();
   swap_chain_.Release();
 }
 
 void DirectCompositionSurfaceWin::InitializeSurface() {
   DCHECK(!dcomp_surface_);
   DCHECK(!swap_chain_);
+  DXGI_FORMAT output_format =
+      base::CommandLine::ForCurrentProcess()->HasSwitch(switches::kEnableHDR)
+          ? DXGI_FORMAT_R16G16B16A16_FLOAT
+          : DXGI_FORMAT_B8G8R8A8_UNORM;
   if (enable_dc_layers_) {
     HRESULT hr = dcomp_device_->CreateSurface(
-        size_.width(), size_.height(), DXGI_FORMAT_B8G8R8A8_UNORM,
+        size_.width(), size_.height(), output_format,
         DXGI_ALPHA_MODE_PREMULTIPLIED, dcomp_surface_.Receive());
     has_been_rendered_to_ = false;
     CHECK(SUCCEEDED(hr));
   } else {
     base::win::ScopedComPtr<IDXGIDevice> dxgi_device;
     d3d11_device_.QueryInterface(dxgi_device.Receive());
     base::win::ScopedComPtr<IDXGIAdapter> dxgi_adapter;
     dxgi_device->GetAdapter(dxgi_adapter.Receive());
     base::win::ScopedComPtr<IDXGIFactory2> dxgi_factory;
     dxgi_adapter->GetParent(IID_PPV_ARGS(dxgi_factory.Receive()));
 
     DXGI_SWAP_CHAIN_DESC1 desc = {};
     desc.Width = size_.width();
     desc.Height = size_.height();
-    desc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
+    desc.Format = output_format;
     desc.Stereo = FALSE;
     desc.SampleDesc.Count = 1;
     desc.BufferCount = 2;
     desc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
     desc.Scaling = DXGI_SCALING_STRETCH;
     desc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL;
     desc.AlphaMode = DXGI_ALPHA_MODE_PREMULTIPLIED;
     desc.Flags = 0;
     HRESULT hr = dxgi_factory->CreateSwapChainForComposition(
         d3d11_device_.get(), &desc, nullptr, swap_chain_.Receive());
@@ skipping 252 matching lines @@
       transform(transform),
       image(image),
       bounds_rect(bounds_rect),
       crop_rect(crop_rect) {}
 
 DirectCompositionSurfaceWin::Overlay::Overlay(const Overlay& overlay) = default;
 
 DirectCompositionSurfaceWin::Overlay::~Overlay() {}
 
 }  // namespace gpu