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/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 "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
  26 #include "third_party/khronos/GLES2/gl2ext.h"
  27
  28 using WebKit::WebGraphicsContext3D;
  29
  30 namespace cc {
  31
  32 scoped_ptr<DelegatingRenderer> DelegatingRenderer::Create(
  33     RendererClient* client,
  34     OutputSurface* output_surface,
  35     ResourceProvider* resource_provider) {
  36   scoped_ptr<DelegatingRenderer> renderer(
  37       new DelegatingRenderer(client, output_surface, resource_provider));
  38   if (!renderer->Initialize())
  39     return scoped_ptr<DelegatingRenderer>();
  40   return renderer.Pass();
  41 }
  42
  43 DelegatingRenderer::DelegatingRenderer(
  44     RendererClient* client,
  45     OutputSurface* output_surface,
  46     ResourceProvider* resource_provider)
  47     : Renderer(client),
  48       output_surface_(output_surface),
  49       resource_provider_(resource_provider),
  50       visible_(true) {
  51   DCHECK(resource_provider_);
  52 }
  53
  54 bool DelegatingRenderer::Initialize() {
  55   capabilities_.using_partial_swap = false;
  56   capabilities_.max_texture_size = resource_provider_->max_texture_size();
  57   capabilities_.best_texture_format = resource_provider_->best_texture_format();
  58   capabilities_.allow_partial_texture_updates = false;
  59   capabilities_.using_offscreen_context3d = false;
  60
  61   if (!output_surface_->context_provider()) {
  62     // TODO(danakj): Make software compositing work.
  63     return true;
  64   }
  65
  66   WebGraphicsContext3D* context3d =
  67       output_surface_->context_provider()->Context3d();
  68
  69   if (!context3d->makeContextCurrent())
  70     return false;
  71
  72   std::string unique_context_name = base::StringPrintf(
  73       "%s-%p",
  74       Settings().compositor_name.c_str(),
  75       context3d);
  76   context3d->pushGroupMarkerEXT(unique_context_name.c_str());
  77
  78   std::string extensions_string =
  79       UTF16ToASCII(context3d->getString(GL_EXTENSIONS));
  80
  81   std::vector<std::string> extensions;
  82   base::SplitString(extensions_string, ' ', &extensions);
  83
  84   // TODO(danakj): We need non-GPU-specific paths for these things. This
  85   // renderer shouldn't need to use context3d extensions directly.
  86   bool has_set_visibility = false;
  87   bool has_io_surface = false;
  88   bool has_arb_texture_rect = false;
  89   bool has_egl_image = false;
  90   bool has_map_image = false;
  91   for (size_t i = 0; i < extensions.size(); ++i) {
  92     if (extensions[i] == "GL_CHROMIUM_set_visibility") {
  93       has_set_visibility = true;
  94     } else if (extensions[i] == "GL_CHROMIUM_iosurface") {
  95       has_io_surface = true;
  96     } else if (extensions[i] == "GL_ARB_texture_rectangle") {
  97         has_arb_texture_rect = true;
  98     } else if (extensions[i] == "GL_OES_EGL_image_external") {
  99         has_egl_image = true;
 100     } else if (extensions[i] == "GL_CHROMIUM_map_image") {
 101       has_map_image = true;
 102     }
 103   }
 104
 105   if (has_io_surface)
 106     DCHECK(has_arb_texture_rect);
 107
 108   capabilities_.using_set_visibility = has_set_visibility;
 109
 110   capabilities_.using_egl_image = has_egl_image;
 111
 112   capabilities_.using_map_image = has_map_image;
 113
 114   return true;
 115 }
 116
 117 DelegatingRenderer::~DelegatingRenderer() {}
 118
 119 const RendererCapabilities& DelegatingRenderer::Capabilities() const {
 120   return capabilities_;
 121 }
 122
 123 bool DelegatingRenderer::CanReadPixels() const { return false; }
 124
 125 static ResourceProvider::ResourceId AppendToArray(
 126     ResourceProvider::ResourceIdArray* array,
 127     ResourceProvider::ResourceId id) {
 128   array->push_back(id);
 129   return id;
 130 }
 131
 132 void DelegatingRenderer::DrawFrame(
 133     RenderPassList* render_passes_in_draw_order) {
 134   TRACE_EVENT0("cc", "DelegatingRenderer::DrawFrame");
 135
 136   DCHECK(!frame_for_swap_buffers_.delegated_frame_data);
 137
 138   frame_for_swap_buffers_.metadata = client_->MakeCompositorFrameMetadata();
 139
 140   frame_for_swap_buffers_.delegated_frame_data =
 141       make_scoped_ptr(new DelegatedFrameData);
 142   DelegatedFrameData& out_data = *frame_for_swap_buffers_.delegated_frame_data;
 143   // Move the render passes and resources into the |out_frame|.
 144   out_data.render_pass_list.swap(*render_passes_in_draw_order);
 145
 146   // Collect all resource ids in the render passes into a ResourceIdArray.
 147   ResourceProvider::ResourceIdArray resources;
 148   DrawQuad::ResourceIteratorCallback append_to_array =
 149       base::Bind(&AppendToArray, &resources);
 150   for (size_t i = 0; i < out_data.render_pass_list.size(); ++i) {
 151     RenderPass* render_pass = out_data.render_pass_list.at(i);
 152     for (size_t j = 0; j < render_pass->quad_list.size(); ++j)
 153       render_pass->quad_list[j]->IterateResources(append_to_array);
 154   }
 155   resource_provider_->PrepareSendToParent(resources, &out_data.resource_list);
 156 }
 157
 158 void DelegatingRenderer::SwapBuffers() {
 159   TRACE_EVENT0("cc", "DelegatingRenderer::SwapBuffers");
 160
 161   output_surface_->SwapBuffers(&frame_for_swap_buffers_);
 162   frame_for_swap_buffers_.delegated_frame_data.reset();
 163 }
 164
 165 void DelegatingRenderer::GetFramebufferPixels(void* pixels, gfx::Rect rect) {
 166   NOTREACHED();
 167 }
 168
 169 void DelegatingRenderer::ReceiveSwapBuffersAck(
 170     const CompositorFrameAck& ack) {
 171   resource_provider_->ReceiveFromParent(ack.resources);
 172 }
 173
 174 bool DelegatingRenderer::IsContextLost() {
 175   ContextProvider* context_provider = output_surface_->context_provider();
 176   if (!context_provider)
 177     return false;
 178   return context_provider->Context3d()->getGraphicsResetStatusARB() !=
 179          GL_NO_ERROR;
 180 }
 181
 182 void DelegatingRenderer::SetVisible(bool visible) {
 183   if (visible == visible_)
 184     return;
 185
 186   visible_ = visible;
 187   ContextProvider* context_provider = output_surface_->context_provider();
 188   if (!visible_) {
 189     TRACE_EVENT0("cc", "DelegatingRenderer::SetVisible dropping resources");
 190     resource_provider_->ReleaseCachedData();
 191     if (context_provider)
 192       context_provider->Context3d()->flush();
 193   }
 194   if (capabilities_.using_set_visibility) {
 195     // We loop visibility to the GPU process, since that's what manages memory.
 196     // That will allow it to feed us with memory allocations that we can act
 197     // upon.
 198     DCHECK(context_provider);
 199     context_provider->Context3d()->setVisibilityCHROMIUM(visible);
 200   }
 201 }
 202
 203 void DelegatingRenderer::SendManagedMemoryStats(size_t bytes_visible,
 204                                                 size_t bytes_visible_and_nearby,
 205                                                 size_t bytes_allocated) {
 206   ContextProvider* context_provider = output_surface_->context_provider();
 207   if (!context_provider) {
 208     // TODO(piman): software path.
 209     NOTIMPLEMENTED();
 210     return;
 211   }
 212   WebKit::WebGraphicsManagedMemoryStats stats;
 213   stats.bytesVisible = bytes_visible;
 214   stats.bytesVisibleAndNearby = bytes_visible_and_nearby;
 215   stats.bytesAllocated = bytes_allocated;
 216   stats.backbufferRequested = false;
 217   context_provider->Context3d()->sendManagedMemoryStatsCHROMIUM(&stats);
 218 }
 219
 220 void DelegatingRenderer::SetDiscardBackBufferWhenNotVisible(bool discard) {
 221   // Nothing to do, we don't have a back buffer.
 222 }
 223
 224 }  // namespace cc