Home | History | Annotate | Download | only in output 
      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/common/gpu_memory_allocation.h"
     27 #include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
     28 #include "third_party/khronos/GLES2/gl2ext.h"
     29 
     30 using blink::WebGraphicsContext3D;
     31 
     32 namespace cc {
     33 
     34 scoped_ptr<DelegatingRenderer> DelegatingRenderer::Create(
     35     RendererClient* client,
     36     const LayerTreeSettings* settings,
     37     OutputSurface* output_surface,
     38     ResourceProvider* resource_provider) {
     39   scoped_ptr<DelegatingRenderer> renderer(new DelegatingRenderer(
     40       client, settings, output_surface, resource_provider));
     41   if (!renderer->Initialize())
     42     return scoped_ptr<DelegatingRenderer>();
     43   return renderer.Pass();
     44 }
     45 
     46 DelegatingRenderer::DelegatingRenderer(RendererClient* client,
     47                                        const LayerTreeSettings* settings,
     48                                        OutputSurface* output_surface,
     49                                        ResourceProvider* resource_provider)
     50     : Renderer(client, settings),
     51       output_surface_(output_surface),
     52       resource_provider_(resource_provider),
     53       visible_(true) {
     54   DCHECK(resource_provider_);
     55 }
     56 
     57 bool DelegatingRenderer::Initialize() {
     58   capabilities_.using_partial_swap = false;
     59   capabilities_.max_texture_size = resource_provider_->max_texture_size();
     60   capabilities_.best_texture_format = resource_provider_->best_texture_format();
     61   capabilities_.allow_partial_texture_updates = false;
     62   capabilities_.using_offscreen_context3d = false;
     63 
     64   if (!output_surface_->context_provider()) {
     65     capabilities_.using_shared_memory_resources = true;
     66     capabilities_.using_map_image = settings_->use_map_image;
     67     return true;
     68   }
     69 
     70   const ContextProvider::Capabilities& caps =
     71       output_surface_->context_provider()->ContextCapabilities();
     72 
     73   DCHECK(!caps.iosurface || caps.texture_rectangle);
     74 
     75   capabilities_.using_egl_image = caps.egl_image_external;
     76   capabilities_.using_map_image = settings_->use_map_image && caps.map_image;
     77 
     78   return true;
     79 }
     80 
     81 DelegatingRenderer::~DelegatingRenderer() {}
     82 
     83 const RendererCapabilitiesImpl& DelegatingRenderer::Capabilities() const {
     84   return capabilities_;
     85 }
     86 
     87 bool DelegatingRenderer::CanReadPixels() const { return false; }
     88 
     89 static ResourceProvider::ResourceId AppendToArray(
     90     ResourceProvider::ResourceIdArray* array,
     91     ResourceProvider::ResourceId id) {
     92   array->push_back(id);
     93   return id;
     94 }
     95 
     96 void DelegatingRenderer::DrawFrame(RenderPassList* render_passes_in_draw_order,
     97                                    ContextProvider* offscreen_context_provider,
     98                                    float device_scale_factor,
     99                                    gfx::Rect device_viewport_rect,
    100                                    gfx::Rect device_clip_rect,
    101                                    bool allow_partial_swap,
    102                                    bool disable_picture_quad_image_filtering) {
    103   TRACE_EVENT0("cc", "DelegatingRenderer::DrawFrame");
    104 
    105   DCHECK(!delegated_frame_data_);
    106 
    107   delegated_frame_data_ = make_scoped_ptr(new DelegatedFrameData);
    108   DelegatedFrameData& out_data = *delegated_frame_data_;
    109   // Move the render passes and resources into the |out_frame|.
    110   out_data.render_pass_list.swap(*render_passes_in_draw_order);
    111 
    112   // Collect all resource ids in the render passes into a ResourceIdArray.
    113   ResourceProvider::ResourceIdArray resources;
    114   DrawQuad::ResourceIteratorCallback append_to_array =
    115       base::Bind(&AppendToArray, &resources);
    116   for (size_t i = 0; i < out_data.render_pass_list.size(); ++i) {
    117     RenderPass* render_pass = out_data.render_pass_list.at(i);
    118     for (size_t j = 0; j < render_pass->quad_list.size(); ++j)
    119       render_pass->quad_list[j]->IterateResources(append_to_array);
    120   }
    121   resource_provider_->PrepareSendToParent(resources, &out_data.resource_list);
    122 }
    123 
    124 void DelegatingRenderer::SwapBuffers(const CompositorFrameMetadata& metadata) {
    125   TRACE_EVENT0("cc", "DelegatingRenderer::SwapBuffers");
    126   CompositorFrame compositor_frame;
    127   compositor_frame.metadata = metadata;
    128   compositor_frame.delegated_frame_data = delegated_frame_data_.Pass();
    129   output_surface_->SwapBuffers(&compositor_frame);
    130 }
    131 
    132 void DelegatingRenderer::GetFramebufferPixels(void* pixels, gfx::Rect rect) {
    133   NOTREACHED();
    134 }
    135 
    136 void DelegatingRenderer::ReceiveSwapBuffersAck(
    137     const CompositorFrameAck& ack) {
    138   resource_provider_->ReceiveReturnsFromParent(ack.resources);
    139 }
    140 
    141 bool DelegatingRenderer::IsContextLost() {
    142   ContextProvider* context_provider = output_surface_->context_provider();
    143   if (!context_provider)
    144     return false;
    145   return context_provider->IsContextLost();
    146 }
    147 
    148 void DelegatingRenderer::SetVisible(bool visible) {
    149   if (visible == visible_)
    150     return;
    151 
    152   visible_ = visible;
    153   ContextProvider* context_provider = output_surface_->context_provider();
    154   if (!visible_) {
    155     TRACE_EVENT0("cc", "DelegatingRenderer::SetVisible dropping resources");
    156     resource_provider_->ReleaseCachedData();
    157     if (context_provider)
    158       context_provider->Context3d()->flush();
    159   }
    160   // We loop visibility to the GPU process, since that's what manages memory.
    161   // That will allow it to feed us with memory allocations that we can act
    162   // upon.
    163   DCHECK(context_provider);
    164   context_provider->ContextSupport()->SetSurfaceVisible(visible);
    165 }
    166 
    167 void DelegatingRenderer::SendManagedMemoryStats(size_t bytes_visible,
    168                                                 size_t bytes_visible_and_nearby,
    169                                                 size_t bytes_allocated) {
    170   ContextProvider* context_provider = output_surface_->context_provider();
    171   if (!context_provider) {
    172     // TODO(piman): software path.
    173     NOTIMPLEMENTED();
    174     return;
    175   }
    176   gpu::ManagedMemoryStats stats;
    177   stats.bytes_required = bytes_visible;
    178   stats.bytes_nice_to_have = bytes_visible_and_nearby;
    179   stats.bytes_allocated = bytes_allocated;
    180   stats.backbuffer_requested = false;
    181 
    182   context_provider->ContextSupport()->SendManagedMemoryStats(stats);
    183 }
    184 
    185 }  // namespace cc
    186