[Android WebView] Implement Ubercomp for Render Thread support

android_webview/browser/browser_view_renderer.cc

 // Copyright 2014 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 "android_webview/browser/browser_view_renderer.h"
 
 #include "android_webview/browser/browser_view_renderer_client.h"
 #include "android_webview/browser/shared_renderer_state.h"
+#include "android_webview/common/aw_switches.h"
 #include "android_webview/public/browser/draw_gl.h"
 #include "base/android/jni_android.h"
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/json/json_writer.h"
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
+#include "cc/output/compositor_frame.h"
 #include "content/public/browser/android/synchronous_compositor.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/content_switches.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkPicture.h"
 #include "third_party/skia/include/core/SkPictureRecorder.h"
 #include "ui/gfx/vector2d_conversions.h"
 
@@ skipping 94 matching lines @@
       shared_renderer_state_(shared_renderer_state),
       web_contents_(web_contents),
       weak_factory_on_ui_thread_(this),
       ui_thread_weak_ptr_(weak_factory_on_ui_thread_.GetWeakPtr()),
       ui_task_runner_(ui_task_runner),
       has_compositor_(false),
       is_paused_(false),
       view_visible_(false),
       window_visible_(false),
       attached_to_window_(false),
+      hardware_enabled_(false),
       dip_scale_(0.0),
       page_scale_factor_(1.0),
       on_new_picture_enable_(false),
       clear_view_(false),
       compositor_needs_continuous_invalidate_(false),
       block_invalidates_(false),
       width_(0),
       height_(0),
       num_tiles_(0u),
       num_bytes_(0u) {
@@ skipping 39 matching lines @@
 
   TRACE_EVENT0("android_webview", "BrowserViewRenderer::TrimMemory");
 
   RequestMemoryPolicy(zero_policy);
   EnforceMemoryPolicyImmediately(zero_policy);
 }
 
 SynchronousCompositorMemoryPolicy
 BrowserViewRenderer::CalculateDesiredMemoryPolicy() {
   SynchronousCompositorMemoryPolicy policy;
-  size_t width = draw_gl_input_.global_visible_rect.width();
-  size_t height = draw_gl_input_.global_visible_rect.height();
+  size_t width = last_on_draw_global_visible_rect_.width();
+  size_t height = last_on_draw_global_visible_rect_.height();
   policy.bytes_limit = kMemoryMultiplier * kBytesPerPixel * width * height;
   // Round up to a multiple of kMemoryAllocationStep.
   policy.bytes_limit =
       (policy.bytes_limit / kMemoryAllocationStep + 1) * kMemoryAllocationStep;
 
   size_t tiles = width * height * kTileMultiplier / g_tile_area;
   // Round up to a multiple of kTileAllocationStep. The minimum number of tiles
   // is also kTileAllocationStep.
   tiles = (tiles / kTileAllocationStep + 1) * kTileAllocationStep;
   policy.num_resources_limit = tiles;
@@ skipping 37 matching lines @@
 
 size_t BrowserViewRenderer::GetNumTiles() const {
   return shared_renderer_state_->GetMemoryPolicy().num_resources_limit;
 }
 
 bool BrowserViewRenderer::OnDraw(jobject java_canvas,
                                  bool is_hardware_canvas,
                                  const gfx::Vector2d& scroll,
                                  const gfx::Rect& global_visible_rect,
                                  const gfx::Rect& clip) {
-  draw_gl_input_.frame_id++;
-  draw_gl_input_.scroll_offset = scroll;
-  draw_gl_input_.global_visible_rect = global_visible_rect;
-  draw_gl_input_.width = width_;
-  draw_gl_input_.height = height_;
+  last_on_draw_scroll_offset_ = scroll;
+  last_on_draw_global_visible_rect_ = global_visible_rect;
+
   if (clear_view_)
     return false;
+
   if (is_hardware_canvas && attached_to_window_) {
-    shared_renderer_state_->SetDrawGLInput(draw_gl_input_);
-
-    SynchronousCompositorMemoryPolicy old_policy =
-        shared_renderer_state_->GetMemoryPolicy();
-    SynchronousCompositorMemoryPolicy new_policy =
-        CalculateDesiredMemoryPolicy();
-    RequestMemoryPolicy(new_policy);
-    // We should be performing a hardware draw here. If we don't have the
-    // compositor yet or if RequestDrawGL fails, it means we failed this draw
-    // and thus return false here to clear to background color for this draw.
-    bool did_draw_gl =
-        has_compositor_ && client_->RequestDrawGL(java_canvas, false);
-    if (did_draw_gl)
-      GlobalTileManager::GetInstance()->DidUse(tile_manager_key_);
-    else
-      RequestMemoryPolicy(old_policy);
-
-    return did_draw_gl;
+    if (switches::UbercompEnabled()) {
+      return OnDrawHardware(java_canvas);
+    } else {
+      return OnDrawHardwareLegacy(java_canvas);
+    }
   }
   // Perform a software draw
   return DrawSWInternal(java_canvas, clip);
 }
 
-void BrowserViewRenderer::DidDrawGL(const DrawGLResult& result) {
-  DidComposite(!result.clip_contains_visible_rect);
+bool BrowserViewRenderer::OnDrawHardwareLegacy(jobject java_canvas) {
+  scoped_ptr<DrawGLInput> draw_gl_input(new DrawGLInput);
+  draw_gl_input->scroll_offset = last_on_draw_scroll_offset_;
+  draw_gl_input->global_visible_rect = last_on_draw_global_visible_rect_;
+  draw_gl_input->width = width_;
+  draw_gl_input->height = height_;
+
+  SynchronousCompositorMemoryPolicy old_policy =
+      shared_renderer_state_->GetMemoryPolicy();
+  SynchronousCompositorMemoryPolicy new_policy = CalculateDesiredMemoryPolicy();
+  RequestMemoryPolicy(new_policy);
+  // We should be performing a hardware draw here. If we don't have the
+  // compositor yet or if RequestDrawGL fails, it means we failed this draw
+  // and thus return false here to clear to background color for this draw.
+  bool did_draw_gl =
+      has_compositor_ && client_->RequestDrawGL(java_canvas, false);
+  if (did_draw_gl) {
+    GlobalTileManager::GetInstance()->DidUse(tile_manager_key_);
+    shared_renderer_state_->SetDrawGLInput(draw_gl_input.Pass());
+  } else {
+    RequestMemoryPolicy(old_policy);
+  }
+
+  return did_draw_gl;
+}
+
+void BrowserViewRenderer::DidDrawGL(scoped_ptr<DrawGLResult> result) {
+  DidComposite(!result->clip_contains_visible_rect);
+}
+
+bool BrowserViewRenderer::OnDrawHardware(jobject java_canvas) {
+  if (!has_compositor_)
+    return false;
+
+  if (!hardware_enabled_) {
+    hardware_enabled_ =
+        shared_renderer_state_->GetCompositor()->InitializeHwDraw(NULL);
+    if (hardware_enabled_) {
+      gpu::GLInProcessContext* share_context =
+          shared_renderer_state_->GetCompositor()->GetShareContext();
+      DCHECK(share_context);
+      shared_renderer_state_->SetSharedContext(share_context);
+    }
+  }
+  if (!hardware_enabled_)
+    return false;
+
+  ReturnResources();
+  SynchronousCompositorMemoryPolicy new_policy = CalculateDesiredMemoryPolicy();
+  RequestMemoryPolicy(new_policy);
+  shared_renderer_state_->GetCompositor()->SetMemoryPolicy(
+      shared_renderer_state_->GetMemoryPolicy());
+
+  scoped_ptr<DrawGLInput> draw_gl_input(new DrawGLInput);
+  draw_gl_input->scroll_offset = last_on_draw_scroll_offset_;
+  draw_gl_input->global_visible_rect = last_on_draw_global_visible_rect_;
+  draw_gl_input->width = width_;
+  draw_gl_input->height = height_;
+
+  gfx::Transform transform;
+  gfx::Size surface_size(width_, height_);
+  gfx::Rect viewport(surface_size);
+  // TODO(boliu): Should really be |last_on_draw_global_visible_rect_|.
+  // See crbug.com/372073.
+  gfx::Rect clip = viewport;
+  bool stencil_enabled = false;
+  bool drew_delegated = shared_renderer_state_->GetCompositor()->DemandDrawHw(
+      surface_size,
+      transform,
+      viewport,
+      clip,
+      stencil_enabled,
+      &draw_gl_input->frame);
+  if (!drew_delegated)
+    return false;
+
+  GlobalTileManager::GetInstance()->DidUse(tile_manager_key_);
+
+  scoped_ptr<DrawGLInput> old_input = shared_renderer_state_->PassDrawGLInput();
+  if (old_input.get()) {
+    shared_renderer_state_->ReturnResources(
+        old_input->frame.delegated_frame_data->resource_list);
+  }
+  shared_renderer_state_->SetDrawGLInput(draw_gl_input.Pass());
+
+  DidComposite(false);
+  bool did_request = client_->RequestDrawGL(java_canvas, false);
+  if (did_request)
+    return true;
+
+  ReturnResources();
+  return false;
+}
+
+void BrowserViewRenderer::DidDrawDelegated(scoped_ptr<DrawGLResult> result) {
+  if (!ui_task_runner_->BelongsToCurrentThread()) {
+    // TODO(boliu): This should be a cancelable callback.
+    ui_task_runner_->PostTask(FROM_HERE,
+                              base::Bind(&BrowserViewRenderer::DidDrawDelegated,
+                                         ui_thread_weak_ptr_,
+                                         base::Passed(&result)));
+    return;
+  }
+  ReturnResources();
+}
+
+void BrowserViewRenderer::ReturnResources() {
+  cc::CompositorFrameAck frame_ack;
+  shared_renderer_state_->SwapReturnedResources(&frame_ack.resources);
+  if (!frame_ack.resources.empty()) {
+    shared_renderer_state_->GetCompositor()->ReturnResources(frame_ack);
+  }
 }
 
 bool BrowserViewRenderer::DrawSWInternal(jobject java_canvas,
                                          const gfx::Rect& clip) {
   if (clip.IsEmpty()) {
     TRACE_EVENT_INSTANT0(
         "android_webview", "EarlyOut_EmptyClip", TRACE_EVENT_SCOPE_THREAD);
     return true;
   }
 
   if (!has_compositor_) {
     TRACE_EVENT_INSTANT0(
         "android_webview", "EarlyOut_NoCompositor", TRACE_EVENT_SCOPE_THREAD);
     return false;
   }
 
   return BrowserViewRendererJavaHelper::GetInstance()
       ->RenderViaAuxilaryBitmapIfNeeded(
             java_canvas,
-            draw_gl_input_.scroll_offset,
+            last_on_draw_scroll_offset_,
             clip,
             base::Bind(&BrowserViewRenderer::CompositeSW,
                        base::Unretained(this)));
 }
 
 skia::RefPtr<SkPicture> BrowserViewRenderer::CapturePicture(int width,
                                                             int height) {
   TRACE_EVENT0("android_webview", "BrowserViewRenderer::CapturePicture");
 
   // Return empty Picture objects for empty SkPictures.
@@ skipping 79 matching lines @@
                height);
   attached_to_window_ = true;
   width_ = width;
   height_ = height;
   tile_manager_key_ = GlobalTileManager::GetInstance()->PushBack(this);
 }
 
 void BrowserViewRenderer::OnDetachedFromWindow() {
   TRACE_EVENT0("android_webview", "BrowserViewRenderer::OnDetachedFromWindow");
   attached_to_window_ = false;
+  if (hardware_enabled_) {
+    scoped_ptr<DrawGLInput> input = shared_renderer_state_->PassDrawGLInput();
+    if (input.get()) {
+      shared_renderer_state_->ReturnResources(
+          input->frame.delegated_frame_data->resource_list);
+    }
+    ReturnResources();
+    DCHECK(shared_renderer_state_->ReturnedResourcesEmpty());
+
+    if (switches::UbercompEnabled())
+      shared_renderer_state_->GetCompositor()->ReleaseHwDraw();
+    shared_renderer_state_->SetSharedContext(NULL);
+    hardware_enabled_ = false;
+  }
   SynchronousCompositorMemoryPolicy zero_policy;
   RequestMemoryPolicy(zero_policy);
   GlobalTileManager::GetInstance()->Remove(tile_manager_key_);
   // The hardware resources are released in the destructor of hardware renderer,
   // so we don't need to do it here.
   // See AwContents::ReleaseHardwareDrawOnRenderThread(JNIEnv*, jobject).
 }
 
 bool BrowserViewRenderer::IsAttachedToWindow() const {
   return attached_to_window_;
@@ skipping 361 matching lines @@
   base::StringAppendF(&str, "dip_scale: %f ", dip_scale_);
   base::StringAppendF(&str, "page_scale_factor: %f ", page_scale_factor_);
   base::StringAppendF(&str,
                       "compositor_needs_continuous_invalidate: %d ",
                       compositor_needs_continuous_invalidate_);
   base::StringAppendF(&str, "block_invalidates: %d ", block_invalidates_);
   base::StringAppendF(&str, "view width height: [%d %d] ", width_, height_);
   base::StringAppendF(&str, "attached_to_window: %d ", attached_to_window_);
   base::StringAppendF(&str,
                       "global visible rect: %s ",
-                      draw_gl_input_.global_visible_rect.ToString().c_str());
+                      last_on_draw_global_visible_rect_.ToString().c_str());
   base::StringAppendF(
       &str, "scroll_offset_dip: %s ", scroll_offset_dip_.ToString().c_str());
   base::StringAppendF(&str,
                       "overscroll_rounding_error_: %s ",
                       overscroll_rounding_error_.ToString().c_str());
   base::StringAppendF(
       &str, "on_new_picture_enable: %d ", on_new_picture_enable_);
   base::StringAppendF(&str, "clear_view: %d ", clear_view_);
   if (draw_info) {
     base::StringAppendF(&str,
                         "clip left top right bottom: [%d %d %d %d] ",
                         draw_info->clip_left,
                         draw_info->clip_top,
                         draw_info->clip_right,
                         draw_info->clip_bottom);
     base::StringAppendF(&str,
                         "surface width height: [%d %d] ",
                         draw_info->width,
                         draw_info->height);
     base::StringAppendF(&str, "is_layer: %d ", draw_info->is_layer);
   }
   return str;
 }
 
 }  // namespace android_webview