Implement common Ozone interface for Chromecast.

chromecast/ozone/surface_factory_chromecast.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 "chromecast/ozone/surface_factory_chromecast.h"

[lcwu1, 2015/03/27 00:51:43]

Add a vertical space above.

[halliwell, 2015/03/27 01:45:03]

Done.

+
+#include "base/callback_helpers.h"
+#include "chromecast/ozone/chromecast_egl_platform.h"
+#include "chromecast/ozone/surface_ozone_egl_chromecast.h"
+
+namespace chromecast {
+namespace ozone {
+
+SurfaceFactoryChromecast::SurfaceFactoryChromecast(
+    scoped_ptr<ChromecastEglPlatform> egl_platform)
+    : state_(UNINITIALIZED),
+      destroy_window_pending_state_(kNoDestroyPending),
+      display_type_(0),
+      window_(0),
+      default_display_size_(egl_platform->GetDefaultDisplaySize()),
+      display_size_(default_display_size_),
+      new_display_size_(default_display_size_),
+      egl_platform_(egl_platform.Pass()) {
+}
+
+SurfaceFactoryChromecast::~SurfaceFactoryChromecast() {
+  DestroyDisplayTypeAndWindow();
+}
+
+void SurfaceFactoryChromecast::InitializeHardware() {
+  if (state_ == INITIALIZED) {
+    return;
+  }
+  CHECK_EQ(state_, UNINITIALIZED);
+
+  if (egl_platform_->InitializeHardware()) {
+    state_ = INITIALIZED;
+  } else {
+    ShutdownHardware();
+    state_ = FAILED;
+  }
+}
+
+void SurfaceFactoryChromecast::ShutdownHardware() {
+  DestroyDisplayTypeAndWindow();
+
+  egl_platform_->ShutdownHardware();
+
+  state_ = UNINITIALIZED;
+}
+
+intptr_t SurfaceFactoryChromecast::GetNativeDisplay() {
+  CreateDisplayTypeAndWindowIfNeeded();
+  return reinterpret_cast<intptr_t>(display_type_);
+}
+
+void SurfaceFactoryChromecast::CreateDisplayTypeAndWindowIfNeeded() {
+  if (state_ == UNINITIALIZED) {
+    InitializeHardware();
+  }
+  if (new_display_size_ != display_size_) {
+    DestroyDisplayTypeAndWindow();
+    display_size_ = new_display_size_;
+  }
+  DCHECK_EQ(state_, INITIALIZED);
+  if (!display_type_) {
+    display_type_ = egl_platform_->CreateDisplayType(display_size_);
+    if (display_type_) {
+      window_ = egl_platform_->CreateWindow(display_type_, display_size_);
+      if (!window_) {
+        DestroyDisplayTypeAndWindow();

[derekjchow1, 2015/03/19 21:28:02]

Would it be reasonable to call ShutdownHardware here? This way when state_ is
FAILED, the state of egl_platform_ will always be the same (hopefully
uninitialized).

[halliwell, 2015/03/19 22:21:58]

We're about to terminate here (FATAL) so I'm not convinced it matters much :) 
In fact ... I'm not quite sure what the point of calling
DestroyDisplayTypeAndWindow is.

For the most part though I'm trying to keep the logic and implementation the
same as the existing one for now.  It will help to track down any problems that
come out of the refactoring.  Then there are a number of things that I'd like to
clean up beyond that.

+        state_ = FAILED;
+        LOG(FATAL) << "Create EGLNativeWindowType(" << display_size_.ToString()
+                   << ") failed.";
+      }
+    } else {
+      state_ = FAILED;

[derekjchow1, 2015/03/19 21:28:02]

Ditto.

+      LOG(FATAL) << "Create EGLNativeDisplayType(" << display_size_.ToString()
+                 << ") failed.";
+    }
+  }
+}
+
+intptr_t SurfaceFactoryChromecast::GetNativeWindow() {
+  CreateDisplayTypeAndWindowIfNeeded();
+  return window_;
+}
+
+bool SurfaceFactoryChromecast::ResizeDisplay(gfx::Size size) {
+  // set size to at least 1280x720 even if passed 1x1
+  size.SetToMax(default_display_size_);
+  if (display_type_ && size != display_size_) {
+    DestroyDisplayTypeAndWindow();
+  }
+  display_size_ = size;
+  return true;
+}
+
+void SurfaceFactoryChromecast::DestroyDisplayTypeAndWindow() {
+  if (window_) {
+    egl_platform_->DestroyWindow(window_);
+    window_ = 0;
+  }
+  if (display_type_) {
+    egl_platform_->DestroyDisplayType(display_type_);
+    display_type_ = 0;
+  }
+}
+
+scoped_ptr<ui::SurfaceOzoneEGL>
+SurfaceFactoryChromecast::CreateEGLSurfaceForWidget(
+    gfx::AcceleratedWidget widget) {
+  new_display_size_ = gfx::Size(widget >> 16, widget & 0xFFFF);
+  new_display_size_.SetToMax(default_display_size_);
+  destroy_window_pending_state_ = kSurfaceExists;
+  SendRelinquishResponse();
+  return make_scoped_ptr<ui::SurfaceOzoneEGL>(
+      new SurfaceOzoneEglChromecast(this));
+}
+
+void SurfaceFactoryChromecast::SetToRelinquishDisplay(
+    const base::Closure& callback) {
+  // This is called in response to a RelinquishDisplay message from the
+  // browser task. This call may come before or after the display surface
+  // is actually destroyed.
+  relinquish_display_callback_ = callback;
+  switch (destroy_window_pending_state_) {
+    case kNoDestroyPending:
+    case kSurfaceDestroyedRecently:
+      DestroyDisplayTypeAndWindow();
+      SendRelinquishResponse();
+      destroy_window_pending_state_ = kNoDestroyPending;
+      break;
+    case kSurfaceExists:
+      destroy_window_pending_state_ = kWindowDestroyPending;
+      break;
+    case kWindowDestroyPending:
+      break;
+    default:
+      NOTREACHED();
+  }
+}
+
+void SurfaceFactoryChromecast::ChildDestroyed() {
+  if (destroy_window_pending_state_ == kWindowDestroyPending) {
+    DestroyDisplayTypeAndWindow();
+    SendRelinquishResponse();
+    destroy_window_pending_state_ = kNoDestroyPending;
+  } else {
+    destroy_window_pending_state_ = kSurfaceDestroyedRecently;
+  }
+}
+
+void SurfaceFactoryChromecast::SendRelinquishResponse() {
+  if (!relinquish_display_callback_.is_null()) {
+    base::ResetAndReturn(&relinquish_display_callback_).Run();
+  }
+}
+
+const int32* SurfaceFactoryChromecast::GetEGLSurfaceProperties(
+    const int32* desired_list) {
+  return egl_platform_->GetEGLSurfaceProperties(desired_list);
+}
+
+bool SurfaceFactoryChromecast::LoadEGLGLES2Bindings(
+    AddGLLibraryCallback add_gl_library,
+    SetGLGetProcAddressProcCallback set_gl_get_proc_address) {
+  if (state_ != INITIALIZED) {
+    InitializeHardware();
+    if (state_ != INITIALIZED) {
+      return false;
+    }
+  }
+
+  return egl_platform_->LoadEGLGLES2Bindings(add_gl_library,
+                                             set_gl_get_proc_address);
+}
+
+}  // namespace ozone
+}  // namespace chromecast