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      1 // Copyright 2014 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_factory_impl.h"
      6 
      7 #include "content/browser/android/in_process/synchronous_compositor_output_surface.h"
      8 #include "content/public/browser/browser_thread.h"
      9 #include "gpu/command_buffer/client/gl_in_process_context.h"
     10 #include "ui/gl/android/surface_texture.h"
     11 #include "ui/gl/gl_surface.h"
     12 #include "ui/gl/gl_surface_stub.h"
     13 #include "webkit/common/gpu/context_provider_in_process.h"
     14 #include "webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.h"
     15 
     16 namespace content {
     17 
     18 namespace {
     19 
     20 blink::WebGraphicsContext3D::Attributes GetDefaultAttribs() {
     21   blink::WebGraphicsContext3D::Attributes attributes;
     22   attributes.antialias = false;
     23   attributes.depth = false;
     24   attributes.stencil = false;
     25   attributes.shareResources = true;
     26   attributes.noAutomaticFlushes = true;
     27 
     28   return attributes;
     29 }
     30 
     31 using webkit::gpu::WebGraphicsContext3DInProcessCommandBufferImpl;
     32 
     33 scoped_ptr<gpu::GLInProcessContext> CreateContext(
     34     scoped_refptr<gfx::GLSurface> surface,
     35     scoped_refptr<gpu::InProcessCommandBuffer::Service> service,
     36     gpu::GLInProcessContext* share_context) {
     37   const gfx::GpuPreference gpu_preference = gfx::PreferDiscreteGpu;
     38 
     39   if (!surface)
     40     surface = gfx::GLSurface::CreateOffscreenGLSurface(gfx::Size(1, 1));
     41 
     42   gpu::GLInProcessContextAttribs in_process_attribs;
     43   WebGraphicsContext3DInProcessCommandBufferImpl::ConvertAttributes(
     44       GetDefaultAttribs(), &in_process_attribs);
     45   scoped_ptr<gpu::GLInProcessContext> context(
     46       gpu::GLInProcessContext::CreateWithSurface(surface,
     47                                                  service,
     48                                                  share_context,
     49                                                  in_process_attribs,
     50                                                  gpu_preference));
     51   return context.Pass();
     52 }
     53 
     54 scoped_ptr<WebGraphicsContext3DInProcessCommandBufferImpl> WrapContext(
     55     scoped_ptr<gpu::GLInProcessContext> context) {
     56   if (!context.get())
     57     return scoped_ptr<WebGraphicsContext3DInProcessCommandBufferImpl>();
     58 
     59   return scoped_ptr<WebGraphicsContext3DInProcessCommandBufferImpl>(
     60       WebGraphicsContext3DInProcessCommandBufferImpl::WrapContext(
     61           context.Pass(), GetDefaultAttribs()));
     62 }
     63 
     64 class VideoContextProvider
     65     : public StreamTextureFactorySynchronousImpl::ContextProvider {
     66  public:
     67   VideoContextProvider(
     68       scoped_ptr<gpu::GLInProcessContext> gl_in_process_context)
     69       : gl_in_process_context_(gl_in_process_context.get()) {
     70 
     71     context_provider_ = webkit::gpu::ContextProviderInProcess::Create(
     72         WrapContext(gl_in_process_context.Pass()),
     73         "Video-Offscreen-main-thread");
     74     context_provider_->BindToCurrentThread();
     75   }
     76 
     77   virtual scoped_refptr<gfx::SurfaceTexture> GetSurfaceTexture(
     78       uint32 stream_id) OVERRIDE {
     79     return gl_in_process_context_->GetSurfaceTexture(stream_id);
     80   }
     81 
     82   virtual blink::WebGraphicsContext3D* Context3d() OVERRIDE {
     83     return context_provider_->Context3d();
     84   }
     85 
     86  private:
     87   friend class base::RefCountedThreadSafe<VideoContextProvider>;
     88   virtual ~VideoContextProvider() {}
     89 
     90   scoped_refptr<cc::ContextProvider> context_provider_;
     91   gpu::GLInProcessContext* gl_in_process_context_;
     92 
     93   DISALLOW_COPY_AND_ASSIGN(VideoContextProvider);
     94 };
     95 
     96 }  // namespace
     97 
     98 using webkit::gpu::WebGraphicsContext3DInProcessCommandBufferImpl;
     99 
    100 SynchronousCompositorFactoryImpl::SynchronousCompositorFactoryImpl()
    101     : wrapped_gl_context_for_main_thread_(NULL),
    102       wrapped_gl_context_for_compositor_thread_(NULL),
    103       num_hardware_compositors_(0) {
    104   SynchronousCompositorFactory::SetInstance(this);
    105 }
    106 
    107 SynchronousCompositorFactoryImpl::~SynchronousCompositorFactoryImpl() {}
    108 
    109 scoped_refptr<base::MessageLoopProxy>
    110 SynchronousCompositorFactoryImpl::GetCompositorMessageLoop() {
    111   return BrowserThread::GetMessageLoopProxyForThread(BrowserThread::UI);
    112 }
    113 
    114 scoped_ptr<cc::OutputSurface>
    115 SynchronousCompositorFactoryImpl::CreateOutputSurface(int routing_id) {
    116   scoped_ptr<SynchronousCompositorOutputSurface> output_surface(
    117       new SynchronousCompositorOutputSurface(routing_id));
    118   return output_surface.PassAs<cc::OutputSurface>();
    119 }
    120 
    121 InputHandlerManagerClient*
    122 SynchronousCompositorFactoryImpl::GetInputHandlerManagerClient() {
    123   return synchronous_input_event_filter();
    124 }
    125 
    126 scoped_refptr<cc::ContextProvider>
    127 SynchronousCompositorFactoryImpl::GetOffscreenContextProviderForMainThread() {
    128   bool failed = false;
    129   if ((!offscreen_context_for_main_thread_.get() ||
    130        offscreen_context_for_main_thread_->DestroyedOnMainThread())) {
    131     scoped_ptr<gpu::GLInProcessContext> context =
    132         CreateContext(NULL, NULL, NULL);
    133     wrapped_gl_context_for_main_thread_ = context.get();
    134     offscreen_context_for_main_thread_ =
    135         webkit::gpu::ContextProviderInProcess::Create(
    136             WrapContext(context.Pass()),
    137             "Compositor-Offscreen-main-thread");
    138     failed = !offscreen_context_for_main_thread_.get() ||
    139              !offscreen_context_for_main_thread_->BindToCurrentThread();
    140   }
    141 
    142   if (failed) {
    143     offscreen_context_for_main_thread_ = NULL;
    144     wrapped_gl_context_for_main_thread_ = NULL;
    145   }
    146   return offscreen_context_for_main_thread_;
    147 }
    148 
    149 // This is called on both renderer main thread (offscreen context creation
    150 // path shared between cross-process and in-process platforms) and renderer
    151 // compositor impl thread (InitializeHwDraw) in order to support Android
    152 // WebView synchronously enable and disable hardware mode multiple times in
    153 // the same task. This is ok because in-process WGC3D creation may happen on
    154 // any thread and is lightweight.
    155 scoped_refptr<cc::ContextProvider> SynchronousCompositorFactoryImpl::
    156     GetOffscreenContextProviderForCompositorThread() {
    157   base::AutoLock lock(offscreen_context_for_compositor_thread_lock_);
    158   DCHECK(service_);
    159   bool failed = false;
    160   if (!offscreen_context_for_compositor_thread_.get() ||
    161       offscreen_context_for_compositor_thread_->DestroyedOnMainThread()) {
    162     scoped_ptr<gpu::GLInProcessContext> context =
    163         CreateContext(new gfx::GLSurfaceStub, service_, NULL);
    164     wrapped_gl_context_for_compositor_thread_ = context.get();
    165     offscreen_context_for_compositor_thread_ =
    166         webkit::gpu::ContextProviderInProcess::Create(
    167             WrapContext(context.Pass()),
    168             "Compositor-Offscreen-compositor-thread");
    169     failed = !offscreen_context_for_compositor_thread_.get() ||
    170              !offscreen_context_for_compositor_thread_->BindToCurrentThread();
    171   }
    172   if (failed) {
    173     offscreen_context_for_compositor_thread_ = NULL;
    174     wrapped_gl_context_for_compositor_thread_ = NULL;
    175   }
    176   return offscreen_context_for_compositor_thread_;
    177 }
    178 
    179 scoped_refptr<cc::ContextProvider> SynchronousCompositorFactoryImpl::
    180     CreateOnscreenContextProviderForCompositorThread(
    181         scoped_refptr<gfx::GLSurface> surface) {
    182   DCHECK(surface);
    183   DCHECK(service_);
    184   DCHECK(wrapped_gl_context_for_compositor_thread_);
    185 
    186   return webkit::gpu::ContextProviderInProcess::Create(
    187       WrapContext(CreateContext(
    188           surface, service_, wrapped_gl_context_for_compositor_thread_)),
    189       "Compositor-Onscreen");
    190 }
    191 
    192 scoped_ptr<StreamTextureFactory>
    193 SynchronousCompositorFactoryImpl::CreateStreamTextureFactory(int view_id) {
    194   scoped_ptr<StreamTextureFactorySynchronousImpl> factory(
    195       new StreamTextureFactorySynchronousImpl(
    196           base::Bind(&SynchronousCompositorFactoryImpl::
    197                           TryCreateStreamTextureFactory,
    198                      base::Unretained(this)),
    199           view_id));
    200   return factory.PassAs<StreamTextureFactory>();
    201 }
    202 
    203 void SynchronousCompositorFactoryImpl::CompositorInitializedHardwareDraw() {
    204   base::AutoLock lock(num_hardware_compositor_lock_);
    205   num_hardware_compositors_++;
    206 }
    207 
    208 void SynchronousCompositorFactoryImpl::CompositorReleasedHardwareDraw() {
    209   base::AutoLock lock(num_hardware_compositor_lock_);
    210   DCHECK_GT(num_hardware_compositors_, 0u);
    211   num_hardware_compositors_--;
    212 }
    213 
    214 bool SynchronousCompositorFactoryImpl::CanCreateMainThreadContext() {
    215   base::AutoLock lock(num_hardware_compositor_lock_);
    216   return num_hardware_compositors_ > 0;
    217 }
    218 
    219 scoped_refptr<StreamTextureFactorySynchronousImpl::ContextProvider>
    220 SynchronousCompositorFactoryImpl::TryCreateStreamTextureFactory() {
    221   scoped_refptr<StreamTextureFactorySynchronousImpl::ContextProvider>
    222       context_provider;
    223   // This check only guarantees the main thread context is created after
    224   // a compositor did successfully initialize hardware draw in the past.
    225   // In particular this does not guarantee that the main thread context
    226   // will fail creation when all compositors release hardware draw.
    227   if (CanCreateMainThreadContext() && !video_context_provider_) {
    228     DCHECK(service_);
    229     DCHECK(wrapped_gl_context_for_compositor_thread_);
    230 
    231     video_context_provider_ = new VideoContextProvider(
    232         CreateContext(new gfx::GLSurfaceStub,
    233                       service_,
    234                       wrapped_gl_context_for_compositor_thread_));
    235   }
    236   return video_context_provider_;
    237 }
    238 
    239 void SynchronousCompositorFactoryImpl::SetDeferredGpuService(
    240     scoped_refptr<gpu::InProcessCommandBuffer::Service> service) {
    241   DCHECK(!service_);
    242   gfx::GLSurface::InitializeOneOff();
    243   service_ = service;
    244 }
    245 
    246 }  // namespace content
    247