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     gfx::Rect viewport_rect_for_tile_priority,
 129     const gfx::Transform& transform_for_tile_priority) {
 130   DCHECK(CalledOnValidThread());
 131   DCHECK(output_surface_);
 132
 133   scoped_ptr<cc::CompositorFrame> frame =
 134       output_surface_->DemandDrawHw(surface_size,
 135                                     transform,
 136                                     viewport,
 137                                     clip,
 138                                     viewport_rect_for_tile_priority,
 139                                     transform_for_tile_priority);
 140   if (frame.get())
 141     UpdateFrameMetaData(frame->metadata);
 142
 143   return frame.Pass();
 144 }
 145
 146 void SynchronousCompositorImpl::ReturnResources(
 147     const cc::CompositorFrameAck& frame_ack) {
 148   DCHECK(CalledOnValidThread());
 149   output_surface_->ReturnResources(frame_ack);
 150 }
 151
 152 bool SynchronousCompositorImpl::DemandDrawSw(SkCanvas* canvas) {
 153   DCHECK(CalledOnValidThread());
 154   DCHECK(output_surface_);
 155
 156   scoped_ptr<cc::CompositorFrame> frame = output_surface_->DemandDrawSw(canvas);
 157   if (frame.get())
 158     UpdateFrameMetaData(frame->metadata);
 159   return !!frame.get();
 160 }
 161
 162 void SynchronousCompositorImpl::UpdateFrameMetaData(
 163     const cc::CompositorFrameMetadata& frame_metadata) {
 164   RenderWidgetHostViewAndroid* rwhv = static_cast<RenderWidgetHostViewAndroid*>(
 165       contents_->GetRenderWidgetHostView());
 166   if (rwhv)
 167     rwhv->SynchronousFrameMetadata(frame_metadata);
 168   DeliverMessages();
 169 }
 170
 171 void SynchronousCompositorImpl::SetMemoryPolicy(
 172     const SynchronousCompositorMemoryPolicy& policy) {
 173   DCHECK(CalledOnValidThread());
 174   DCHECK(output_surface_);
 175
 176   output_surface_->SetMemoryPolicy(policy);
 177 }
 178
 179 void SynchronousCompositorImpl::DidChangeRootLayerScrollOffset() {
 180   if (input_handler_)
 181     input_handler_->OnRootLayerDelegatedScrollOffsetChanged();
 182 }
 183
 184 void SynchronousCompositorImpl::DidBindOutputSurface(
 185       SynchronousCompositorOutputSurface* output_surface) {
 186   DCHECK(CalledOnValidThread());
 187   output_surface_ = output_surface;
 188   if (compositor_client_)
 189     compositor_client_->DidInitializeCompositor(this);
 190 }
 191
 192 void SynchronousCompositorImpl::DidDestroySynchronousOutputSurface(
 193        SynchronousCompositorOutputSurface* output_surface) {
 194   DCHECK(CalledOnValidThread());
 195
 196   // Allow for transient hand-over when two output surfaces may refer to
 197   // a single delegate.
 198   if (output_surface_ == output_surface) {
 199     output_surface_ = NULL;
 200     if (compositor_client_)
 201       compositor_client_->DidDestroyCompositor(this);
 202     compositor_client_ = NULL;
 203   }
 204 }
 205
 206 void SynchronousCompositorImpl::SetInputHandler(
 207     cc::InputHandler* input_handler) {
 208   DCHECK(CalledOnValidThread());
 209
 210   if (input_handler_)
 211     input_handler_->SetRootLayerScrollOffsetDelegate(NULL);
 212
 213   input_handler_ = input_handler;
 214
 215   if (input_handler_)
 216     input_handler_->SetRootLayerScrollOffsetDelegate(this);
 217 }
 218
 219 void SynchronousCompositorImpl::DidOverscroll(
 220     const DidOverscrollParams& params) {
 221   if (compositor_client_) {
 222     compositor_client_->DidOverscroll(params.accumulated_overscroll,
 223                                       params.latest_overscroll_delta,
 224                                       params.current_fling_velocity);
 225   }
 226 }
 227
 228 void SynchronousCompositorImpl::DidStopFlinging() {
 229   RenderWidgetHostViewAndroid* rwhv = static_cast<RenderWidgetHostViewAndroid*>(
 230       contents_->GetRenderWidgetHostView());
 231   if (rwhv)
 232     rwhv->DidStopFlinging();
 233 }
 234
 235 void SynchronousCompositorImpl::SetContinuousInvalidate(bool enable) {
 236   DCHECK(CalledOnValidThread());
 237   if (compositor_client_)
 238     compositor_client_->SetContinuousInvalidate(enable);
 239 }
 240
 241 InputEventAckState SynchronousCompositorImpl::HandleInputEvent(
 242     const blink::WebInputEvent& input_event) {
 243   DCHECK(CalledOnValidThread());
 244   return g_factory.Get().synchronous_input_event_filter()->HandleInputEvent(
 245       contents_->GetRoutingID(), input_event);
 246 }
 247
 248 void SynchronousCompositorImpl::DeliverMessages() {
 249   ScopedVector<IPC::Message> messages;
 250   output_surface_->GetMessagesToDeliver(&messages);
 251   RenderProcessHost* rph = contents_->GetRenderProcessHost();
 252   for (ScopedVector<IPC::Message>::const_iterator i = messages.begin();
 253        i != messages.end();
 254        ++i) {
 255     rph->OnMessageReceived(**i);
 256   }
 257 }
 258
 259 void SynchronousCompositorImpl::DidActivatePendingTree() {
 260   if (compositor_client_)
 261     compositor_client_->DidUpdateContent();
 262 }
 263
 264 gfx::Vector2dF SynchronousCompositorImpl::GetTotalScrollOffset() {
 265   DCHECK(CalledOnValidThread());
 266   if (compositor_client_)
 267     return compositor_client_->GetTotalRootLayerScrollOffset();
 268   return gfx::Vector2dF();
 269 }
 270
 271 bool SynchronousCompositorImpl::IsExternalFlingActive() const {
 272   DCHECK(CalledOnValidThread());
 273   if (compositor_client_)
 274     return compositor_client_->IsExternalFlingActive();
 275   return false;
 276 }
 277
 278 void SynchronousCompositorImpl::UpdateRootLayerState(
 279     const gfx::Vector2dF& total_scroll_offset,
 280     const gfx::Vector2dF& max_scroll_offset,
 281     const gfx::SizeF& scrollable_size,
 282     float page_scale_factor,
 283     float min_page_scale_factor,
 284     float max_page_scale_factor) {
 285   DCHECK(CalledOnValidThread());
 286   if (!compositor_client_)
 287     return;
 288
 289   compositor_client_->UpdateRootLayerState(total_scroll_offset,
 290                                            max_scroll_offset,
 291                                            scrollable_size,
 292                                            page_scale_factor,
 293                                            min_page_scale_factor,
 294                                            max_page_scale_factor);
 295 }
 296
 297 // Not using base::NonThreadSafe as we want to enforce a more exacting threading
 298 // requirement: SynchronousCompositorImpl() must only be used on the UI thread.
 299 bool SynchronousCompositorImpl::CalledOnValidThread() const {
 300   return BrowserThread::CurrentlyOn(BrowserThread::UI);
 301 }
 302
 303 // static
 304 void SynchronousCompositor::SetClientForWebContents(
 305     WebContents* contents,
 306     SynchronousCompositorClient* client) {
 307   DCHECK(contents);
 308   if (client) {
 309     g_factory.Get();  // Ensure it's initialized.
 310     SynchronousCompositorImpl::CreateForWebContents(contents);
 311   }
 312   if (SynchronousCompositorImpl* instance =
 313       SynchronousCompositorImpl::FromWebContents(contents)) {
 314     instance->SetClient(client);
 315   }
 316 }
 317
 318 }  // namespace content