cc/output/delegating_renderer.cc

   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/trace_event/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 RendererSettings* 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 RendererSettings* 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 =
  45       output_surface->capabilities().can_force_reclaim_resources;
  46
  47   if (!output_surface_->context_provider()) {
  48     capabilities_.using_shared_memory_resources = 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_image = caps.gpu.image;
  57
  58     capabilities_.allow_rasterize_on_demand = false;
  59     capabilities_.max_msaa_samples = caps.gpu.max_samples;
  60   }
  61 }
  62
  63 DelegatingRenderer::~DelegatingRenderer() {}
  64
  65 const RendererCapabilitiesImpl& DelegatingRenderer::Capabilities() const {
  66   return capabilities_;
  67 }
  68
  69 static ResourceId AppendToArray(ResourceProvider::ResourceIdArray* array,
  70                                 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 (const auto& render_pass : out_data.render_pass_list) {
  95     for (const auto& quad : render_pass->quad_list)
  96       quad->IterateResources(append_to_array);
  97   }
  98   resource_provider_->PrepareSendToParent(resources, &out_data.resource_list);
  99 }
 100
 101 void DelegatingRenderer::SwapBuffers(const CompositorFrameMetadata& metadata) {
 102   TRACE_EVENT0("cc,benchmark", "DelegatingRenderer::SwapBuffers");
 103   CompositorFrame compositor_frame;
 104   compositor_frame.metadata = metadata;
 105   compositor_frame.delegated_frame_data = delegated_frame_data_.Pass();
 106   output_surface_->SwapBuffers(&compositor_frame);
 107 }
 108
 109 void DelegatingRenderer::ReceiveSwapBuffersAck(
 110     const CompositorFrameAck& ack) {
 111   resource_provider_->ReceiveReturnsFromParent(ack.resources);
 112 }
 113
 114 void DelegatingRenderer::DidChangeVisibility() {
 115   ContextProvider* context_provider = output_surface_->context_provider();
 116   if (!visible()) {
 117     TRACE_EVENT0("cc", "DelegatingRenderer::SetVisible dropping resources");
 118     resource_provider_->ReleaseCachedData();
 119     if (context_provider) {
 120       context_provider->DeleteCachedResources();
 121       context_provider->ContextGL()->Flush();
 122     }
 123   }
 124   // We loop visibility to the GPU process, since that's what manages memory.
 125   // That will allow it to feed us with memory allocations that we can act
 126   // upon.
 127   if (context_provider)
 128     context_provider->ContextSupport()->SetSurfaceVisible(visible());
 129 }
 130
 131 }  // namespace cc