Use IDCompositionSurface to implement 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 "gpu/ipc/service/gpu_channel_manager.h"
 #include "gpu/ipc/service/gpu_channel_manager_delegate.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
+#endif /* EGL_ANGLE_flexible_surface_compatibility */
+
+#ifndef EGL_ANGLE_d3d_texture_client_buffer
+#define EGL_ANGLE_d3d_texture_client_buffer 1
+#define EGL_D3D_TEXTURE_ANGLE 0x33A3
+#endif /* EGL_ANGLE_d3d_texture_client_buffer */
 
 namespace gpu {
+namespace {
+
+// This class is used to make sure a specified surface isn't current, and upon
+// destruction it will make the surface current again if it had been before.
+class ScopedReleaseCurrent {
+ public:
+  explicit ScopedReleaseCurrent(gl::GLSurface* this_surface) {
+    gl::GLContext* current_context = gl::GLContext::GetCurrent();
+    bool was_current =
+        current_context && current_context->IsCurrent(this_surface);
+    if (was_current) {
+      make_current_.emplace(current_context, this_surface);
+      current_context->ReleaseCurrent(this_surface);
+    }
+  }
+
+ private:
+  base::Optional<ui::ScopedMakeCurrent> make_current_;
+};
+
+// Only one DirectComposition surface can be rendered into at a time. Track
+// here which IDCompositionSurface is being rendered into. If another context
+// is made current, then this surface will be suspended.
+IDCompositionSurface* g_current_surface;
+
+}  // namespace
 
 DirectCompositionSurfaceWin::DirectCompositionSurfaceWin(
     base::WeakPtr<ImageTransportSurfaceDelegate> delegate,
     HWND parent_window)
-    : gl::GLSurfaceEGL(),
-      child_window_(delegate, parent_window),
-      window_(nullptr),
-      surface_(0),
-      first_swap_(true) {}
+    : gl::GLSurfaceEGL(), child_window_(delegate, parent_window) {}
+
+DirectCompositionSurfaceWin::~DirectCompositionSurfaceWin() {
+  Destroy();
+}
 
 bool DirectCompositionSurfaceWin::InitializeNativeWindow() {
   if (window_)
     return true;
 
   bool result = child_window_.Initialize();
   window_ = child_window_.window();
   return result;
 }
 
+bool DirectCompositionSurfaceWin::Initialize(
+    std::unique_ptr<gfx::VSyncProvider> vsync_provider) {
+  vsync_provider_ = std::move(vsync_provider);
+  return Initialize(gl::GLSurfaceFormat());
+}
+
 bool DirectCompositionSurfaceWin::Initialize(gl::GLSurfaceFormat format) {
+  d3d11_device_ = gl::QueryD3D11DeviceObjectFromANGLE();
+  dcomp_device_ = gl::QueryDirectCompositionDevice(d3d11_device_);
+  if (!dcomp_device_)
+    return false;
+
   EGLDisplay display = GetDisplay();
   if (!window_) {
     if (!InitializeNativeWindow()) {
       LOG(ERROR) << "Failed to initialize native window";
       return false;
     }
   }
+
+  base::win::ScopedComPtr<IDCompositionDesktopDevice> desktop_device;
+  dcomp_device_.QueryInterface(desktop_device.Receive());
+
+  HRESULT hr = desktop_device->CreateTargetForHwnd(window_, TRUE,
+                                                   dcomp_target_.Receive());
+  if (FAILED(hr))
+    return false;
+
+  hr = dcomp_device_->CreateVisual(visual_.Receive());
+  if (FAILED(hr))
+    return false;
+
+  dcomp_target_->SetRoot(visual_.get());
+
   std::vector<EGLint> pbuffer_attribs;
   pbuffer_attribs.push_back(EGL_WIDTH);
   pbuffer_attribs.push_back(1);
   pbuffer_attribs.push_back(EGL_HEIGHT);
   pbuffer_attribs.push_back(1);
 
   pbuffer_attribs.push_back(EGL_NONE);
-  surface_ = eglCreatePbufferSurface(display, GetConfig(), &pbuffer_attribs[0]);
-  CHECK(!!surface_);
+  default_surface_ =
+      eglCreatePbufferSurface(display, GetConfig(), &pbuffer_attribs[0]);
+  CHECK(!!default_surface_);
+
+  InitializeSurface();
 
   return true;
 }
 
+void DirectCompositionSurfaceWin::InitializeSurface() {
+  ScopedReleaseCurrent release_current(this);
+  ReleaseDrawTexture();
+  dcomp_surface_.Release();
+  HRESULT hr = dcomp_device_->CreateSurface(
+      size_.width(), size_.height(), DXGI_FORMAT_B8G8R8A8_UNORM,
+      DXGI_ALPHA_MODE_PREMULTIPLIED, dcomp_surface_.Receive());
+  has_been_rendered_to_ = false;
+
+  CHECK(SUCCEEDED(hr));
+}
+
+void DirectCompositionSurfaceWin::ReleaseDrawTexture() {
+  if (real_surface_) {
+    eglDestroySurface(GetDisplay(), real_surface_);
+    real_surface_ = nullptr;
+  }
+  if (draw_texture_) {
+    draw_texture_.Release();
+    HRESULT hr = dcomp_surface_->EndDraw();
+    CHECK(SUCCEEDED(hr));
+  }
+  if (dcomp_surface_ == g_current_surface)
+    g_current_surface = nullptr;
+}
+
 void DirectCompositionSurfaceWin::Destroy() {
-  if (surface_) {
-    if (!eglDestroySurface(GetDisplay(), surface_)) {
+  if (default_surface_) {
+    if (!eglDestroySurface(GetDisplay(), default_surface_)) {
       LOG(ERROR) << "eglDestroySurface failed with error "
                  << ui::GetLastEGLErrorString();
     }
-    surface_ = NULL;
+    default_surface_ = NULL;
   }
+  if (real_surface_) {
+    if (!eglDestroySurface(GetDisplay(), real_surface_)) {
+      LOG(ERROR) << "eglDestroySurface failed with error "

[dcheng, 2017/02/15 06:57:05]

DLOG instead of LOG (this applies elsewhere as well)?

+                 << ui::GetLastEGLErrorString();
+    }
+    real_surface_ = NULL;

[dcheng, 2017/02/15 06:57:05]

Nit: nullptr

+  }
+  if (dcomp_surface_ == g_current_surface)
+    g_current_surface = nullptr;
+  draw_texture_.Release();
+  dcomp_surface_.Release();
 }
 
 gfx::Size DirectCompositionSurfaceWin::GetSize() {
   return size_;
 }
 
 bool DirectCompositionSurfaceWin::IsOffscreen() {
   return false;
 }
 
 void* DirectCompositionSurfaceWin::GetHandle() {
-  return surface_;
+  return real_surface_ ? real_surface_ : default_surface_;
 }
 
 bool DirectCompositionSurfaceWin::Resize(const gfx::Size& size,
                                          float scale_factor,
                                          bool has_alpha) {
   if (size == GetSize())
     return true;
 
   // Force a resize and redraw (but not a move, activate, etc.).
   if (!SetWindowPos(window_, nullptr, 0, 0, size.width(), size.height(),
                     SWP_NOMOVE | SWP_NOACTIVATE | SWP_NOCOPYBITS |
                         SWP_NOOWNERZORDER | SWP_NOZORDER)) {
     return false;
   }
   size_ = size;
+  InitializeSurface();
+
   return true;
 }
 
 gfx::SwapResult DirectCompositionSurfaceWin::SwapBuffers() {
-  CommitAndClearPendingOverlays();
+  {
+    ScopedReleaseCurrent release_current(this);
+    ReleaseDrawTexture();
+    visual_->SetContent(dcomp_surface_.get());
+
+    CommitAndClearPendingOverlays();
+    dcomp_device_->Commit();
+  }
   // Force the driver to finish drawing before clearing the contents to
   // transparent, to reduce or eliminate the period of time where the contents
   // have flashed black.
   if (first_swap_) {
     glFinish();
     first_swap_ = false;
   }
   child_window_.ClearInvalidContents();
   return gfx::SwapResult::SWAP_ACK;
 }
 
 gfx::SwapResult DirectCompositionSurfaceWin::PostSubBuffer(int x,
                                                            int y,
                                                            int width,
                                                            int height) {
+  ScopedReleaseCurrent release_current(this);
+  ReleaseDrawTexture();
+  visual_->SetContent(dcomp_surface_.get());
   CommitAndClearPendingOverlays();
+  dcomp_device_->Commit();
   child_window_.ClearInvalidContents();
   return gfx::SwapResult::SWAP_ACK;
 }
 
 gfx::VSyncProvider* DirectCompositionSurfaceWin::GetVSyncProvider() {
   return vsync_provider_.get();
 }
 
-bool DirectCompositionSurfaceWin::Initialize(
-    std::unique_ptr<gfx::VSyncProvider> vsync_provider) {
-  vsync_provider_ = std::move(vsync_provider);
-  return Initialize(gl::GLSurfaceFormat());
-}
-
 bool DirectCompositionSurfaceWin::ScheduleOverlayPlane(
     int z_order,
     gfx::OverlayTransform transform,
     gl::GLImage* image,
     const gfx::Rect& bounds_rect,
     const gfx::RectF& crop_rect) {
   pending_overlays_.push_back(
       Overlay(z_order, transform, image, bounds_rect, crop_rect));
   return true;
 }
 
+bool DirectCompositionSurfaceWin::CommitAndClearPendingOverlays() {
+  pending_overlays_.clear();
+  return true;
+}
+
+bool DirectCompositionSurfaceWin::FlipsVertically() const {
+  return true;
+}
+
 bool DirectCompositionSurfaceWin::SupportsPostSubBuffer() {
   return true;
 }
 
+bool DirectCompositionSurfaceWin::OnMakeCurrent(gl::GLContext* context) {
+  if (g_current_surface != dcomp_surface_) {
+    if (g_current_surface) {
+      HRESULT hr = g_current_surface->SuspendDraw();
+      CHECK(SUCCEEDED(hr));
+      g_current_surface = nullptr;
+    }
+    if (draw_texture_) {
+      HRESULT hr = dcomp_surface_->ResumeDraw();
+      CHECK(SUCCEEDED(hr));
+      g_current_surface = dcomp_surface_.get();
+    }
+  }
+  return true;
+}
+
+bool DirectCompositionSurfaceWin::SupportsSetDrawRectangle() const {
+  return true;
+}
+
+bool DirectCompositionSurfaceWin::SetDrawRectangle(const gfx::Rect& rectangle) {
+  if (draw_texture_)
+    return false;
+  if (!gfx::Rect(size_).Contains(rectangle)) {
+    LOG(ERROR) << "Draw rectangle must be contained within size of surface";
+    return false;
+  }
+  if (gfx::Rect(size_) != rectangle && !has_been_rendered_to_) {
+    LOG(ERROR) << "First draw to surface must draw to everything";
+    return false;
+  }
+
+  DCHECK(!real_surface_);
+  CHECK(!g_current_surface);
+  ScopedReleaseCurrent release_current(this);
+
+  RECT rect = rectangle.ToRECT();
+  // TODO(jbauman): Use update_offset
+  POINT update_offset;
+
+  HRESULT hr = dcomp_surface_->BeginDraw(
+      &rect, IID_PPV_ARGS(draw_texture_.Receive()), &update_offset);
+  CHECK(SUCCEEDED(hr));
+  has_been_rendered_to_ = true;
+
+  g_current_surface = dcomp_surface_.get();
+
+  std::vector<EGLint> pbuffer_attribs;

[dcheng, 2017/02/15 06:57:05]

Nit: consider using an initializer list here.

+  pbuffer_attribs.push_back(EGL_WIDTH);
+  pbuffer_attribs.push_back(size_.width());
+  pbuffer_attribs.push_back(EGL_HEIGHT);
+  pbuffer_attribs.push_back(size_.height());
+  pbuffer_attribs.push_back(EGL_FLEXIBLE_SURFACE_COMPATIBILITY_SUPPORTED_ANGLE);
+  pbuffer_attribs.push_back(EGL_TRUE);
+  pbuffer_attribs.push_back(EGL_NONE);
+
+  EGLClientBuffer buffer =
+      reinterpret_cast<EGLClientBuffer>(draw_texture_.get());
+  real_surface_ = eglCreatePbufferFromClientBuffer(
+      GetDisplay(), EGL_D3D_TEXTURE_ANGLE, buffer, GetConfig(),
+      &pbuffer_attribs[0]);
+
+  return true;
+}
+
 DirectCompositionSurfaceWin::Overlay::Overlay(int z_order,
                                               gfx::OverlayTransform transform,
                                               scoped_refptr<gl::GLImage> image,
                                               gfx::Rect bounds_rect,
                                               gfx::RectF crop_rect)
     : z_order(z_order),
       transform(transform),
       image(image),
       bounds_rect(bounds_rect),
       crop_rect(crop_rect) {}
 
 DirectCompositionSurfaceWin::Overlay::Overlay(const Overlay& overlay) = default;
 
 DirectCompositionSurfaceWin::Overlay::~Overlay() {}
 
-bool DirectCompositionSurfaceWin::CommitAndClearPendingOverlays() {
-  pending_overlays_.clear();
-  return true;
-}
-
-DirectCompositionSurfaceWin::~DirectCompositionSurfaceWin() {}
-
 }  // namespace gpu