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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 "base/strings/string_split.h"
     13 #include "base/strings/string_util.h"
     14 #include "base/strings/stringprintf.h"
     15 #include "cc/output/compositor_frame_ack.h"
     16 #include "cc/quads/checkerboard_draw_quad.h"
     17 #include "cc/quads/debug_border_draw_quad.h"
     18 #include "cc/quads/render_pass.h"
     19 #include "cc/quads/render_pass_draw_quad.h"
     20 #include "cc/quads/solid_color_draw_quad.h"
     21 #include "cc/quads/texture_draw_quad.h"
     22 #include "cc/quads/tile_draw_quad.h"
     23 #include "cc/quads/yuv_video_draw_quad.h"
     24 #include "cc/resources/resource_provider.h"
     25 #include "gpu/command_buffer/client/context_support.h"
     26 #include "gpu/command_buffer/client/gles2_interface.h"
     27 #include "gpu/command_buffer/common/gpu_memory_allocation.h"
     28 #include "third_party/khronos/GLES2/gl2ext.h"
     29 
     30 
     31 namespace cc {
     32 
     33 scoped_ptr<DelegatingRenderer> DelegatingRenderer::Create(
     34     RendererClient* client,
     35     const LayerTreeSettings* settings,
     36     OutputSurface* output_surface,
     37     ResourceProvider* resource_provider) {
     38   return make_scoped_ptr(new DelegatingRenderer(
     39       client, settings, output_surface, resource_provider));
     40 }
     41 
     42 DelegatingRenderer::DelegatingRenderer(RendererClient* client,
     43                                        const LayerTreeSettings* settings,
     44                                        OutputSurface* output_surface,
     45                                        ResourceProvider* resource_provider)
     46     : Renderer(client, settings),
     47       output_surface_(output_surface),
     48       resource_provider_(resource_provider) {
     49   DCHECK(resource_provider_);
     50 
     51   capabilities_.using_partial_swap = false;
     52   capabilities_.max_texture_size = resource_provider_->max_texture_size();
     53   capabilities_.best_texture_format = resource_provider_->best_texture_format();
     54   capabilities_.allow_partial_texture_updates = false;
     55 
     56   if (!output_surface_->context_provider()) {
     57     capabilities_.using_shared_memory_resources = true;
     58     capabilities_.using_map_image = true;
     59   } else {
     60     const ContextProvider::Capabilities& caps =
     61         output_surface_->context_provider()->ContextCapabilities();
     62 
     63     DCHECK(!caps.gpu.iosurface || caps.gpu.texture_rectangle);
     64 
     65     capabilities_.using_egl_image = caps.gpu.egl_image_external;
     66     capabilities_.using_map_image = caps.gpu.map_image;
     67 
     68     capabilities_.allow_rasterize_on_demand = false;
     69   }
     70 }
     71 
     72 DelegatingRenderer::~DelegatingRenderer() {}
     73 
     74 const RendererCapabilitiesImpl& DelegatingRenderer::Capabilities() const {
     75   return capabilities_;
     76 }
     77 
     78 static ResourceProvider::ResourceId AppendToArray(
     79     ResourceProvider::ResourceIdArray* array,
     80     ResourceProvider::ResourceId id) {
     81   array->push_back(id);
     82   return id;
     83 }
     84 
     85 void DelegatingRenderer::DrawFrame(RenderPassList* render_passes_in_draw_order,
     86                                    float device_scale_factor,
     87                                    const gfx::Rect& device_viewport_rect,
     88                                    const gfx::Rect& device_clip_rect,
     89                                    bool disable_picture_quad_image_filtering) {
     90   TRACE_EVENT0("cc", "DelegatingRenderer::DrawFrame");
     91 
     92   DCHECK(!delegated_frame_data_);
     93 
     94   delegated_frame_data_ = make_scoped_ptr(new DelegatedFrameData);
     95   DelegatedFrameData& out_data = *delegated_frame_data_;
     96   out_data.device_scale_factor = device_scale_factor;
     97   // Move the render passes and resources into the |out_frame|.
     98   out_data.render_pass_list.swap(*render_passes_in_draw_order);
     99 
    100   // Collect all resource ids in the render passes into a ResourceIdArray.
    101   ResourceProvider::ResourceIdArray resources;
    102   DrawQuad::ResourceIteratorCallback append_to_array =
    103       base::Bind(&AppendToArray, &resources);
    104   for (size_t i = 0; i < out_data.render_pass_list.size(); ++i) {
    105     RenderPass* render_pass = out_data.render_pass_list.at(i);
    106     for (size_t j = 0; j < render_pass->quad_list.size(); ++j)
    107       render_pass->quad_list[j]->IterateResources(append_to_array);
    108   }
    109   resource_provider_->PrepareSendToParent(resources, &out_data.resource_list);
    110 }
    111 
    112 void DelegatingRenderer::SwapBuffers(const CompositorFrameMetadata& metadata) {
    113   TRACE_EVENT0("cc,benchmark", "DelegatingRenderer::SwapBuffers");
    114   CompositorFrame compositor_frame;
    115   compositor_frame.metadata = metadata;
    116   compositor_frame.delegated_frame_data = delegated_frame_data_.Pass();
    117   output_surface_->SwapBuffers(&compositor_frame);
    118 }
    119 
    120 void DelegatingRenderer::ReceiveSwapBuffersAck(
    121     const CompositorFrameAck& ack) {
    122   resource_provider_->ReceiveReturnsFromParent(ack.resources);
    123 }
    124 
    125 bool DelegatingRenderer::IsContextLost() {
    126   ContextProvider* context_provider = output_surface_->context_provider();
    127   if (!context_provider)
    128     return false;
    129   return context_provider->IsContextLost();
    130 }
    131 
    132 void DelegatingRenderer::DidChangeVisibility() {
    133   ContextProvider* context_provider = output_surface_->context_provider();
    134   if (!visible()) {
    135     TRACE_EVENT0("cc", "DelegatingRenderer::SetVisible dropping resources");
    136     resource_provider_->ReleaseCachedData();
    137     if (context_provider) {
    138       context_provider->DeleteCachedResources();
    139       context_provider->ContextGL()->Flush();
    140     }
    141   }
    142   // We loop visibility to the GPU process, since that's what manages memory.
    143   // That will allow it to feed us with memory allocations that we can act
    144   // upon.
    145   if (context_provider)
    146     context_provider->ContextSupport()->SetSurfaceVisible(visible());
    147 }
    148 
    149 }  // namespace cc
    150