Revert of Refactor content/common/gpu into gpu/ipc/service

content/common/gpu/child_window_surface_win.cc

+// Copyright 2015 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 "content/common/gpu/child_window_surface_win.h"
+
+#include "base/compiler_specific.h"
+#include "base/win/scoped_hdc.h"
+#include "base/win/wrapped_window_proc.h"
+#include "content/common/gpu/gpu_channel_manager.h"
+#include "content/common/gpu/gpu_channel_manager_delegate.h"
+#include "gpu/ipc/common/gpu_messages.h"
+#include "ui/base/win/hidden_window.h"
+#include "ui/gfx/native_widget_types.h"
+#include "ui/gfx/win/hwnd_util.h"
+#include "ui/gl/egl_util.h"
+#include "ui/gl/gl_context.h"
+#include "ui/gl/gl_surface_egl.h"
+#include "ui/gl/scoped_make_current.h"
+
+namespace content {
+
+namespace {
+
+ATOM g_window_class;
+
+LRESULT CALLBACK IntermediateWindowProc(HWND window,
+                                        UINT message,
+                                        WPARAM w_param,
+                                        LPARAM l_param) {
+  switch (message) {
+    case WM_ERASEBKGND:
+      // Prevent windows from erasing the background.
+      return 1;
+    case WM_PAINT:
+      PAINTSTRUCT paint;
+      if (BeginPaint(window, &paint)) {
+        ChildWindowSurfaceWin* window_surface =
+            reinterpret_cast<ChildWindowSurfaceWin*>(
+                gfx::GetWindowUserData(window));
+        DCHECK(window_surface);
+
+        // Wait to clear the contents until a GL draw occurs, as otherwise an
+        // unsightly black flash may happen if the GL contents are still
+        // transparent.
+        window_surface->InvalidateWindowRect(gfx::Rect(paint.rcPaint));
+        EndPaint(window, &paint);
+      }
+      return 0;
+    default:
+      return DefWindowProc(window, message, w_param, l_param);
+  }
+}
+
+void InitializeWindowClass() {
+  if (g_window_class)
+    return;
+
+  WNDCLASSEX intermediate_class;
+  base::win::InitializeWindowClass(
+      L"Intermediate D3D Window",
+      &base::win::WrappedWindowProc<IntermediateWindowProc>, CS_OWNDC, 0, 0,
+      nullptr, reinterpret_cast<HBRUSH>(GetStockObject(BLACK_BRUSH)), nullptr,
+      nullptr, nullptr, &intermediate_class);
+  g_window_class = RegisterClassEx(&intermediate_class);
+  if (!g_window_class) {
+    LOG(ERROR) << "RegisterClass failed.";
+    return;
+  }
+}
+}
+
+ChildWindowSurfaceWin::ChildWindowSurfaceWin(GpuChannelManager* manager,
+                                             HWND parent_window)
+    : gfx::NativeViewGLSurfaceEGL(0),
+      parent_window_(parent_window),
+      manager_(manager),
+      alpha_(true),
+      first_swap_(true) {
+  // Don't use EGL_ANGLE_window_fixed_size so that we can avoid recreating the
+  // window surface, which can cause flicker on DirectComposition.
+  enable_fixed_size_angle_ = false;
+}
+
+EGLConfig ChildWindowSurfaceWin::GetConfig() {
+  if (!config_) {
+    int alpha_size = alpha_ ? 8 : EGL_DONT_CARE;
+
+    EGLint config_attribs[] = {EGL_ALPHA_SIZE,
+                               alpha_size,
+                               EGL_BLUE_SIZE,
+                               8,
+                               EGL_GREEN_SIZE,
+                               8,
+                               EGL_RED_SIZE,
+                               8,
+                               EGL_RENDERABLE_TYPE,
+                               EGL_OPENGL_ES2_BIT,
+                               EGL_SURFACE_TYPE,
+                               EGL_WINDOW_BIT | EGL_PBUFFER_BIT,
+                               EGL_NONE};
+
+    EGLDisplay display = GetHardwareDisplay();
+    EGLint num_configs;
+    if (!eglChooseConfig(display, config_attribs, &config_, 1, &num_configs)) {
+      LOG(ERROR) << "eglChooseConfig failed with error "
+                 << ui::GetLastEGLErrorString();
+      return NULL;
+    }
+  }
+
+  return config_;
+}
+
+bool ChildWindowSurfaceWin::InitializeNativeWindow() {
+  if (window_)
+    return true;
+  InitializeWindowClass();
+  DCHECK(g_window_class);
+
+  RECT windowRect;
+  GetClientRect(parent_window_, &windowRect);
+
+  window_ = CreateWindowEx(
+      WS_EX_NOPARENTNOTIFY, reinterpret_cast<wchar_t*>(g_window_class), L"",
+      WS_CHILDWINDOW | WS_DISABLED | WS_VISIBLE, 0, 0,
+      windowRect.right - windowRect.left, windowRect.bottom - windowRect.top,
+      ui::GetHiddenWindow(), NULL, NULL, NULL);
+  gfx::SetWindowUserData(window_, this);
+  manager_->delegate()->SendAcceleratedSurfaceCreatedChildWindow(parent_window_,
+                                                                 window_);
+  return true;
+}
+
+bool ChildWindowSurfaceWin::Resize(const gfx::Size& size,
+                                   float scale_factor,
+                                   bool has_alpha) {
+  if (!SupportsPostSubBuffer()) {
+    if (!MoveWindow(window_, 0, 0, size.width(), size.height(), FALSE)) {
+      return false;
+    }
+    alpha_ = has_alpha;
+    return gfx::NativeViewGLSurfaceEGL::Resize(size, scale_factor, has_alpha);
+  } else {
+    if (size == GetSize() && has_alpha == alpha_)
+      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;
+    if (has_alpha == alpha_) {
+      // A 0-size PostSubBuffer doesn't swap but forces the swap chain to resize
+      // to match the window.
+      PostSubBuffer(0, 0, 0, 0);
+    } else {
+      alpha_ = has_alpha;
+      config_ = nullptr;
+
+      scoped_ptr<ui::ScopedMakeCurrent> scoped_make_current;
+      gfx::GLContext* current_context = gfx::GLContext::GetCurrent();
+      bool was_current = current_context && current_context->IsCurrent(this);
+      if (was_current) {
+        scoped_make_current.reset(
+            new ui::ScopedMakeCurrent(current_context, this));
+        current_context->ReleaseCurrent(this);
+      }
+
+      Destroy();
+
+      if (!Initialize()) {
+        LOG(ERROR) << "Failed to resize window.";
+        return false;
+      }
+    }
+    return true;
+  }
+}
+
+gfx::SwapResult ChildWindowSurfaceWin::SwapBuffers() {
+  gfx::SwapResult result = NativeViewGLSurfaceEGL::SwapBuffers();
+  // 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;
+  }
+  ClearInvalidContents();
+  return result;
+}
+
+gfx::SwapResult ChildWindowSurfaceWin::PostSubBuffer(int x,
+                                                     int y,
+                                                     int width,
+                                                     int height) {
+  gfx::SwapResult result =
+      NativeViewGLSurfaceEGL::PostSubBuffer(x, y, width, height);
+  ClearInvalidContents();
+  return result;
+}
+
+void ChildWindowSurfaceWin::InvalidateWindowRect(const gfx::Rect& rect) {
+  rect_to_clear_.Union(rect);
+}
+
+void ChildWindowSurfaceWin::ClearInvalidContents() {
+  if (!rect_to_clear_.IsEmpty()) {
+    base::win::ScopedGetDC dc(window_);
+
+    RECT rect = rect_to_clear_.ToRECT();
+
+    // DirectComposition composites with the contents under the SwapChain,
+    // so ensure that's cleared. GDI treats black as transparent.
+    FillRect(dc, &rect, reinterpret_cast<HBRUSH>(GetStockObject(BLACK_BRUSH)));
+    rect_to_clear_ = gfx::Rect();
+  }
+}
+
+ChildWindowSurfaceWin::~ChildWindowSurfaceWin() {
+  gfx::SetWindowUserData(window_, nullptr);
+  DestroyWindow(window_);
+}
+
+}  // namespace content