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      1 // Copyright 2012 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 "cc/output/delegating_renderer.h"
      6 
      7 #include <set>
      8 #include <string>
      9 #include <vector>
     10 
     11 #include "base/debug/trace_event.h"
     12 #include "cc/output/compositor_frame_ack.h"
     13 #include "cc/output/context_provider.h"
     14 #include "cc/quads/draw_quad.h"
     15 #include "cc/quads/render_pass.h"
     16 #include "cc/resources/resource_provider.h"
     17 #include "gpu/command_buffer/client/context_support.h"
     18 #include "gpu/command_buffer/client/gles2_interface.h"
     19 
     20 
     21 namespace cc {
     22 
     23 scoped_ptr<DelegatingRenderer> DelegatingRenderer::Create(
     24     RendererClient* client,
     25     const LayerTreeSettings* settings,
     26     OutputSurface* output_surface,
     27     ResourceProvider* resource_provider) {
     28   return make_scoped_ptr(new DelegatingRenderer(
     29       client, settings, output_surface, resource_provider));
     30 }
     31 
     32 DelegatingRenderer::DelegatingRenderer(RendererClient* client,
     33                                        const LayerTreeSettings* settings,
     34                                        OutputSurface* output_surface,
     35                                        ResourceProvider* resource_provider)
     36     : Renderer(client, settings),
     37       output_surface_(output_surface),
     38       resource_provider_(resource_provider) {
     39   DCHECK(resource_provider_);
     40 
     41   capabilities_.using_partial_swap = false;
     42   capabilities_.max_texture_size = resource_provider_->max_texture_size();
     43   capabilities_.best_texture_format = resource_provider_->best_texture_format();
     44   capabilities_.allow_partial_texture_updates = false;
     45 
     46   if (!output_surface_->context_provider()) {
     47     capabilities_.using_shared_memory_resources = true;
     48     capabilities_.using_map_image = true;
     49   } else {
     50     const ContextProvider::Capabilities& caps =
     51         output_surface_->context_provider()->ContextCapabilities();
     52 
     53     DCHECK(!caps.gpu.iosurface || caps.gpu.texture_rectangle);
     54 
     55     capabilities_.using_egl_image = caps.gpu.egl_image_external;
     56     capabilities_.using_map_image = caps.gpu.map_image;
     57 
     58     capabilities_.allow_rasterize_on_demand = false;
     59   }
     60 }
     61 
     62 DelegatingRenderer::~DelegatingRenderer() {}
     63 
     64 const RendererCapabilitiesImpl& DelegatingRenderer::Capabilities() const {
     65   return capabilities_;
     66 }
     67 
     68 static ResourceProvider::ResourceId AppendToArray(
     69     ResourceProvider::ResourceIdArray* array,
     70     ResourceProvider::ResourceId id) {
     71   array->push_back(id);
     72   return id;
     73 }
     74 
     75 void DelegatingRenderer::DrawFrame(RenderPassList* render_passes_in_draw_order,
     76                                    float device_scale_factor,
     77                                    const gfx::Rect& device_viewport_rect,
     78                                    const gfx::Rect& device_clip_rect,
     79                                    bool disable_picture_quad_image_filtering) {
     80   TRACE_EVENT0("cc", "DelegatingRenderer::DrawFrame");
     81 
     82   DCHECK(!delegated_frame_data_);
     83 
     84   delegated_frame_data_ = make_scoped_ptr(new DelegatedFrameData);
     85   DelegatedFrameData& out_data = *delegated_frame_data_;
     86   out_data.device_scale_factor = device_scale_factor;
     87   // Move the render passes and resources into the |out_frame|.
     88   out_data.render_pass_list.swap(*render_passes_in_draw_order);
     89 
     90   // Collect all resource ids in the render passes into a ResourceIdArray.
     91   ResourceProvider::ResourceIdArray resources;
     92   DrawQuad::ResourceIteratorCallback append_to_array =
     93       base::Bind(&AppendToArray, &resources);
     94   for (size_t i = 0; i < out_data.render_pass_list.size(); ++i) {
     95     RenderPass* render_pass = out_data.render_pass_list.at(i);
     96     for (QuadList::Iterator iter = render_pass->quad_list.begin();
     97          iter != render_pass->quad_list.end();
     98          ++iter) {
     99       iter->IterateResources(append_to_array);
    100     }
    101   }
    102   resource_provider_->PrepareSendToParent(resources, &out_data.resource_list);
    103 }
    104 
    105 void DelegatingRenderer::SwapBuffers(const CompositorFrameMetadata& metadata) {
    106   TRACE_EVENT0("cc,benchmark", "DelegatingRenderer::SwapBuffers");
    107   CompositorFrame compositor_frame;
    108   compositor_frame.metadata = metadata;
    109   compositor_frame.delegated_frame_data = delegated_frame_data_.Pass();
    110   output_surface_->SwapBuffers(&compositor_frame);
    111 }
    112 
    113 void DelegatingRenderer::ReceiveSwapBuffersAck(
    114     const CompositorFrameAck& ack) {
    115   resource_provider_->ReceiveReturnsFromParent(ack.resources);
    116 }
    117 
    118 void DelegatingRenderer::DidChangeVisibility() {
    119   ContextProvider* context_provider = output_surface_->context_provider();
    120   if (!visible()) {
    121     TRACE_EVENT0("cc", "DelegatingRenderer::SetVisible dropping resources");
    122     resource_provider_->ReleaseCachedData();
    123     if (context_provider) {
    124       context_provider->DeleteCachedResources();
    125       context_provider->ContextGL()->Flush();
    126     }
    127   }
    128   // We loop visibility to the GPU process, since that's what manages memory.
    129   // That will allow it to feed us with memory allocations that we can act
    130   // upon.
    131   if (context_provider)
    132     context_provider->ContextSupport()->SetSurfaceVisible(visible());
    133 }
    134 
    135 }  // namespace cc
    136