src/content/browser/android/in_process/synchronous_compositor_impl.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/android/in_process/synchronous_compositor_impl.h"
   6
   7 #include "base/lazy_instance.h"
   8 #include "base/message_loop/message_loop.h"
   9 #include "cc/input/input_handler.h"
  10 #include "content/browser/android/in_process/synchronous_compositor_factory_impl.h"
  11 #include "content/browser/android/in_process/synchronous_input_event_filter.h"
  12 #include "content/browser/renderer_host/render_widget_host_view_android.h"
  13 #include "content/common/input/did_overscroll_params.h"
  14 #include "content/public/browser/android/synchronous_compositor_client.h"
  15 #include "content/public/browser/browser_thread.h"
  16 #include "content/public/browser/render_process_host.h"
  17 #include "content/public/browser/render_view_host.h"
  18 #include "ui/gl/gl_surface.h"
  19
  20 namespace content {
  21
  22 namespace {
  23
  24 int GetInProcessRendererId() {
  25   content::RenderProcessHost::iterator it =
  26       content::RenderProcessHost::AllHostsIterator();
  27   if (it.IsAtEnd()) {
  28     // There should always be one RPH in single process mode.
  29     NOTREACHED();
  30     return 0;
  31   }
  32
  33   int id = it.GetCurrentValue()->GetID();
  34   it.Advance();
  35   DCHECK(it.IsAtEnd());  // Not multiprocess compatible.
  36   return id;
  37 }
  38
  39 base::LazyInstance<SynchronousCompositorFactoryImpl>::Leaky g_factory =
  40     LAZY_INSTANCE_INITIALIZER;
  41
  42 }  // namespace
  43
  44 DEFINE_WEB_CONTENTS_USER_DATA_KEY(SynchronousCompositorImpl);
  45
  46 // static
  47 SynchronousCompositorImpl* SynchronousCompositorImpl::FromID(int process_id,
  48                                                              int routing_id) {
  49   if (g_factory == NULL)
  50     return NULL;
  51   RenderViewHost* rvh = RenderViewHost::FromID(process_id, routing_id);
  52   if (!rvh)
  53     return NULL;
  54   WebContents* contents = WebContents::FromRenderViewHost(rvh);
  55   if (!contents)
  56     return NULL;
  57   return FromWebContents(contents);
  58 }
  59
  60 SynchronousCompositorImpl* SynchronousCompositorImpl::FromRoutingID(
  61     int routing_id) {
  62   return FromID(GetInProcessRendererId(), routing_id);
  63 }
  64
  65 SynchronousCompositorImpl::SynchronousCompositorImpl(WebContents* contents)
  66     : compositor_client_(NULL),
  67       output_surface_(NULL),
  68       contents_(contents),
  69       input_handler_(NULL),
  70       weak_ptr_factory_(this) {
  71   DCHECK(contents);
  72 }
  73
  74 SynchronousCompositorImpl::~SynchronousCompositorImpl() {
  75   if (compositor_client_)
  76     compositor_client_->DidDestroyCompositor(this);
  77   SetInputHandler(NULL);
  78 }
  79
  80 void SynchronousCompositorImpl::SetClient(
  81     SynchronousCompositorClient* compositor_client) {
  82   DCHECK(CalledOnValidThread());
  83   compositor_client_ = compositor_client;
  84 }
  85
  86 // static
  87 void SynchronousCompositor::SetGpuService(
  88     scoped_refptr<gpu::InProcessCommandBuffer::Service> service) {
  89   g_factory.Get().SetDeferredGpuService(service);
  90 }
  91
  92 // static
  93 void SynchronousCompositor::SetRecordFullDocument(bool record_full_document) {
  94   g_factory.Get().SetRecordFullDocument(record_full_document);
  95 }
  96
  97 bool SynchronousCompositorImpl::InitializeHwDraw() {
  98   DCHECK(CalledOnValidThread());
  99   DCHECK(output_surface_);
 100
 101   scoped_refptr<cc::ContextProvider> onscreen_context =
 102       g_factory.Get().CreateOnscreenContextProviderForCompositorThread();
 103
 104   bool success = output_surface_->InitializeHwDraw(onscreen_context);
 105
 106   if (success)
 107     g_factory.Get().CompositorInitializedHardwareDraw();
 108   return success;
 109 }
 110
 111 void SynchronousCompositorImpl::ReleaseHwDraw() {
 112   DCHECK(CalledOnValidThread());
 113   DCHECK(output_surface_);
 114   output_surface_->ReleaseHwDraw();
 115   g_factory.Get().CompositorReleasedHardwareDraw();
 116 }
 117
 118 gpu::GLInProcessContext* SynchronousCompositorImpl::GetShareContext() {
 119   DCHECK(CalledOnValidThread());
 120   return g_factory.Get().GetShareContext();
 121 }
 122
 123 scoped_ptr<cc::CompositorFrame> SynchronousCompositorImpl::DemandDrawHw(
 124     gfx::Size surface_size,
 125     const gfx::Transform& transform,
 126     gfx::Rect viewport,
 127     gfx::Rect clip) {
 128   DCHECK(CalledOnValidThread());
 129   DCHECK(output_surface_);
 130
 131   scoped_ptr<cc::CompositorFrame> frame =
 132       output_surface_->DemandDrawHw(surface_size, transform, viewport, clip);
 133   if (frame.get())
 134     UpdateFrameMetaData(frame->metadata);
 135   return frame.Pass();
 136 }
 137
 138 void SynchronousCompositorImpl::ReturnResources(
 139     const cc::CompositorFrameAck& frame_ack) {
 140   DCHECK(CalledOnValidThread());
 141   output_surface_->ReturnResources(frame_ack);
 142 }
 143
 144 bool SynchronousCompositorImpl::DemandDrawSw(SkCanvas* canvas) {
 145   DCHECK(CalledOnValidThread());
 146   DCHECK(output_surface_);
 147
 148   scoped_ptr<cc::CompositorFrame> frame = output_surface_->DemandDrawSw(canvas);
 149   if (frame.get())
 150     UpdateFrameMetaData(frame->metadata);
 151   return !!frame.get();
 152 }
 153
 154 void SynchronousCompositorImpl::UpdateFrameMetaData(
 155     const cc::CompositorFrameMetadata& frame_metadata) {
 156   RenderWidgetHostViewAndroid* rwhv = static_cast<RenderWidgetHostViewAndroid*>(
 157       contents_->GetRenderWidgetHostView());
 158   if (rwhv)
 159     rwhv->SynchronousFrameMetadata(frame_metadata);
 160 }
 161
 162 void SynchronousCompositorImpl::SetMemoryPolicy(
 163     const SynchronousCompositorMemoryPolicy& policy) {
 164   DCHECK(CalledOnValidThread());
 165   DCHECK(output_surface_);
 166
 167   output_surface_->SetMemoryPolicy(policy);
 168 }
 169
 170 void SynchronousCompositorImpl::DidChangeRootLayerScrollOffset() {
 171   if (input_handler_)
 172     input_handler_->OnRootLayerDelegatedScrollOffsetChanged();
 173 }
 174
 175 void SynchronousCompositorImpl::DidBindOutputSurface(
 176       SynchronousCompositorOutputSurface* output_surface) {
 177   DCHECK(CalledOnValidThread());
 178   output_surface_ = output_surface;
 179   if (compositor_client_)
 180     compositor_client_->DidInitializeCompositor(this);
 181 }
 182
 183 void SynchronousCompositorImpl::DidDestroySynchronousOutputSurface(
 184        SynchronousCompositorOutputSurface* output_surface) {
 185   DCHECK(CalledOnValidThread());
 186
 187   // Allow for transient hand-over when two output surfaces may refer to
 188   // a single delegate.
 189   if (output_surface_ == output_surface) {
 190     output_surface_ = NULL;
 191     if (compositor_client_)
 192       compositor_client_->DidDestroyCompositor(this);
 193     compositor_client_ = NULL;
 194   }
 195 }
 196
 197 void SynchronousCompositorImpl::SetInputHandler(
 198     cc::InputHandler* input_handler) {
 199   DCHECK(CalledOnValidThread());
 200
 201   if (input_handler_)
 202     input_handler_->SetRootLayerScrollOffsetDelegate(NULL);
 203
 204   input_handler_ = input_handler;
 205
 206   if (input_handler_)
 207     input_handler_->SetRootLayerScrollOffsetDelegate(this);
 208 }
 209
 210 void SynchronousCompositorImpl::DidOverscroll(
 211     const DidOverscrollParams& params) {
 212   if (compositor_client_) {
 213     compositor_client_->DidOverscroll(params.accumulated_overscroll,
 214                                       params.latest_overscroll_delta,
 215                                       params.current_fling_velocity);
 216   }
 217 }
 218
 219 void SynchronousCompositorImpl::DidStopFlinging() {
 220   RenderWidgetHostViewAndroid* rwhv = static_cast<RenderWidgetHostViewAndroid*>(
 221       contents_->GetRenderWidgetHostView());
 222   if (rwhv)
 223     rwhv->DidStopFlinging();
 224 }
 225
 226 void SynchronousCompositorImpl::SetContinuousInvalidate(bool enable) {
 227   DCHECK(CalledOnValidThread());
 228   if (compositor_client_)
 229     compositor_client_->SetContinuousInvalidate(enable);
 230 }
 231
 232 InputEventAckState SynchronousCompositorImpl::HandleInputEvent(
 233     const blink::WebInputEvent& input_event) {
 234   DCHECK(CalledOnValidThread());
 235   return g_factory.Get().synchronous_input_event_filter()->HandleInputEvent(
 236       contents_->GetRoutingID(), input_event);
 237 }
 238
 239 void SynchronousCompositorImpl::DidActivatePendingTree() {
 240   if (compositor_client_)
 241     compositor_client_->DidUpdateContent();
 242 }
 243
 244 gfx::Vector2dF SynchronousCompositorImpl::GetTotalScrollOffset() {
 245   DCHECK(CalledOnValidThread());
 246   if (compositor_client_)
 247     return compositor_client_->GetTotalRootLayerScrollOffset();
 248   return gfx::Vector2dF();
 249 }
 250
 251 bool SynchronousCompositorImpl::IsExternalFlingActive() const {
 252   DCHECK(CalledOnValidThread());
 253   if (compositor_client_)
 254     return compositor_client_->IsExternalFlingActive();
 255   return false;
 256 }
 257
 258 void SynchronousCompositorImpl::UpdateRootLayerState(
 259     const gfx::Vector2dF& total_scroll_offset,
 260     const gfx::Vector2dF& max_scroll_offset,
 261     const gfx::SizeF& scrollable_size,
 262     float page_scale_factor,
 263     float min_page_scale_factor,
 264     float max_page_scale_factor) {
 265   DCHECK(CalledOnValidThread());
 266   if (!compositor_client_)
 267     return;
 268
 269   compositor_client_->UpdateRootLayerState(total_scroll_offset,
 270                                            max_scroll_offset,
 271                                            scrollable_size,
 272                                            page_scale_factor,
 273                                            min_page_scale_factor,
 274                                            max_page_scale_factor);
 275 }
 276
 277 // Not using base::NonThreadSafe as we want to enforce a more exacting threading
 278 // requirement: SynchronousCompositorImpl() must only be used on the UI thread.
 279 bool SynchronousCompositorImpl::CalledOnValidThread() const {
 280   return BrowserThread::CurrentlyOn(BrowserThread::UI);
 281 }
 282
 283 // static
 284 void SynchronousCompositor::SetClientForWebContents(
 285     WebContents* contents,
 286     SynchronousCompositorClient* client) {
 287   DCHECK(contents);
 288   if (client) {
 289     g_factory.Get();  // Ensure it's initialized.
 290     SynchronousCompositorImpl::CreateForWebContents(contents);
 291   }
 292   if (SynchronousCompositorImpl* instance =
 293       SynchronousCompositorImpl::FromWebContents(contents)) {
 294     instance->SetClient(client);
 295   }
 296 }
 297
 298 }  // namespace content