android_webview/browser/hardware_renderer.cc

   1 // Copyright 2014 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 "android_webview/browser/hardware_renderer.h"
   6
   7 #include "android_webview/browser/aw_gl_surface.h"
   8 #include "android_webview/browser/aw_render_thread_context_provider.h"
   9 #include "android_webview/browser/child_frame.h"
  10 #include "android_webview/browser/deferred_gpu_command_service.h"
  11 #include "android_webview/browser/parent_compositor_draw_constraints.h"
  12 #include "android_webview/browser/parent_output_surface.h"
  13 #include "android_webview/browser/shared_renderer_state.h"
  14 #include "android_webview/public/browser/draw_gl.h"
  15 #include "base/auto_reset.h"
  16 #include "base/strings/string_number_conversions.h"
  17 #include "base/trace_event/trace_event.h"
  18 #include "cc/output/compositor_frame.h"
  19 #include "cc/output/output_surface.h"
  20 #include "cc/output/renderer_settings.h"
  21 #include "cc/quads/shared_quad_state.h"
  22 #include "cc/quads/surface_draw_quad.h"
  23 #include "cc/surfaces/display.h"
  24 #include "cc/surfaces/surface_factory.h"
  25 #include "cc/surfaces/surface_id_allocator.h"
  26 #include "gpu/command_buffer/client/gl_in_process_context.h"
  27 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
  28 #include "ui/gfx/geometry/rect_conversions.h"
  29 #include "ui/gfx/geometry/rect_f.h"
  30 #include "ui/gfx/transform.h"
  31 #include "ui/gl/gl_bindings.h"
  32
  33 namespace android_webview {
  34
  35 HardwareRenderer::HardwareRenderer(SharedRendererState* state)
  36     : shared_renderer_state_(state),
  37       last_egl_context_(eglGetCurrentContext()),
  38       gl_surface_(new AwGLSurface),
  39       output_surface_(NULL) {
  40   DCHECK(last_egl_context_);
  41
  42   cc::RendererSettings settings;
  43
  44   // Should be kept in sync with compositor_impl_android.cc.
  45   settings.allow_antialiasing = false;
  46   settings.highp_threshold_min = 2048;
  47
  48   // Webview does not own the surface so should not clear it.
  49   settings.should_clear_root_render_pass = false;
  50
  51   surface_manager_.reset(new cc::SurfaceManager);
  52   surface_id_allocator_.reset(new cc::SurfaceIdAllocator(1));
  53   display_.reset(new cc::Display(this, surface_manager_.get(), nullptr, nullptr,
  54                                  settings));
  55   surface_factory_.reset(new cc::SurfaceFactory(surface_manager_.get(), this));
  56 }
  57
  58 HardwareRenderer::~HardwareRenderer() {
  59   // Must reset everything before |surface_factory_| to ensure all
  60   // resources are returned before resetting.
  61   if (!root_id_.is_null())
  62     surface_factory_->Destroy(root_id_);
  63   if (!child_id_.is_null())
  64     surface_factory_->Destroy(child_id_);
  65   display_.reset();
  66   surface_factory_.reset();
  67
  68   // Reset draw constraints.
  69   shared_renderer_state_->PostExternalDrawConstraintsToChildCompositorOnRT(
  70       ParentCompositorDrawConstraints());
  71 }
  72
  73 void HardwareRenderer::CommitFrame() {
  74   TRACE_EVENT0("android_webview", "CommitFrame");
  75   scroll_offset_ = shared_renderer_state_->GetScrollOffsetOnRT();
  76   {
  77     scoped_ptr<ChildFrame> child_frame =
  78         shared_renderer_state_->PassCompositorFrameOnRT();
  79     if (!child_frame.get())
  80       return;
  81     child_frame_ = child_frame.Pass();
  82   }
  83
  84   scoped_ptr<cc::CompositorFrame> frame = child_frame_->frame.Pass();
  85   DCHECK(frame.get());
  86   DCHECK(!frame->gl_frame_data);
  87
  88   // On Android we put our browser layers in physical pixels and set our
  89   // browser CC device_scale_factor to 1, so suppress the transform between
  90   // DIP and pixels.
  91   frame->delegated_frame_data->device_scale_factor = 1.0f;
  92
  93   gfx::Size frame_size =
  94       frame->delegated_frame_data->render_pass_list.back()->output_rect.size();
  95   bool size_changed = frame_size != frame_size_;
  96   frame_size_ = frame_size;
  97   if (child_id_.is_null() || size_changed) {
  98     if (!child_id_.is_null())
  99       surface_factory_->Destroy(child_id_);
 100     child_id_ = surface_id_allocator_->GenerateId();
 101     surface_factory_->Create(child_id_);
 102   }
 103
 104   surface_factory_->SubmitCompositorFrame(child_id_, frame.Pass(),
 105                                           cc::SurfaceFactory::DrawCallback());
 106 }
 107
 108 void HardwareRenderer::DrawGL(bool stencil_enabled,
 109                               int framebuffer_binding_ext,
 110                               AwDrawGLInfo* draw_info) {
 111   TRACE_EVENT0("android_webview", "HardwareRenderer::DrawGL");
 112
 113   // We need to watch if the current Android context has changed and enforce
 114   // a clean-up in the compositor.
 115   EGLContext current_context = eglGetCurrentContext();
 116   DCHECK(current_context) << "DrawGL called without EGLContext";
 117
 118   // TODO(boliu): Handle context loss.
 119   if (last_egl_context_ != current_context)
 120     DLOG(WARNING) << "EGLContextChanged";
 121
 122   gfx::Transform transform(gfx::Transform::kSkipInitialization);
 123   transform.matrix().setColMajorf(draw_info->transform);
 124   transform.Translate(scroll_offset_.x(), scroll_offset_.y());
 125
 126   gfx::Size viewport(draw_info->width, draw_info->height);
 127   // Need to post the new transform matrix back to child compositor
 128   // because there is no onDraw during a Render Thread animation, and child
 129   // compositor might not have the tiles rasterized as the animation goes on.
 130   ParentCompositorDrawConstraints draw_constraints(
 131       draw_info->is_layer, transform, viewport.IsEmpty());
 132   if (!child_frame_.get() || draw_constraints.NeedUpdate(*child_frame_)) {
 133     shared_renderer_state_->PostExternalDrawConstraintsToChildCompositorOnRT(
 134         draw_constraints);
 135   }
 136
 137   if (child_id_.is_null())
 138     return;
 139
 140   gfx::Rect clip(draw_info->clip_left, draw_info->clip_top,
 141                  draw_info->clip_right - draw_info->clip_left,
 142                  draw_info->clip_bottom - draw_info->clip_top);
 143
 144   // Create a frame with a single SurfaceDrawQuad referencing the child
 145   // Surface and transformed using the given transform.
 146   scoped_ptr<cc::RenderPass> render_pass = cc::RenderPass::Create();
 147   render_pass->SetAll(cc::RenderPassId(1, 1), gfx::Rect(viewport), clip,
 148                       gfx::Transform(), true);
 149
 150   cc::SharedQuadState* quad_state =
 151       render_pass->CreateAndAppendSharedQuadState();
 152   quad_state->quad_to_target_transform = transform;
 153   quad_state->quad_layer_bounds = frame_size_;
 154   quad_state->visible_quad_layer_rect = gfx::Rect(frame_size_);
 155   quad_state->opacity = 1.f;
 156
 157   cc::SurfaceDrawQuad* surface_quad =
 158       render_pass->CreateAndAppendDrawQuad<cc::SurfaceDrawQuad>();
 159   surface_quad->SetNew(quad_state, gfx::Rect(quad_state->quad_layer_bounds),
 160                        gfx::Rect(quad_state->quad_layer_bounds), child_id_);
 161
 162   scoped_ptr<cc::DelegatedFrameData> delegated_frame(
 163       new cc::DelegatedFrameData);
 164   delegated_frame->render_pass_list.push_back(render_pass.Pass());
 165   scoped_ptr<cc::CompositorFrame> frame(new cc::CompositorFrame);
 166   frame->delegated_frame_data = delegated_frame.Pass();
 167
 168   if (root_id_.is_null()) {
 169     root_id_ = surface_id_allocator_->GenerateId();
 170     surface_factory_->Create(root_id_);
 171     display_->SetSurfaceId(root_id_, 1.f);
 172   }
 173   surface_factory_->SubmitCompositorFrame(root_id_, frame.Pass(),
 174                                           cc::SurfaceFactory::DrawCallback());
 175
 176   display_->Resize(viewport);
 177
 178   gl_surface_->SetBackingFrameBufferObject(framebuffer_binding_ext);
 179   if (!output_surface_) {
 180     scoped_refptr<cc::ContextProvider> context_provider =
 181         AwRenderThreadContextProvider::Create(
 182             gl_surface_, DeferredGpuCommandService::GetInstance());
 183     scoped_ptr<ParentOutputSurface> output_surface_holder(
 184         new ParentOutputSurface(context_provider));
 185     output_surface_ = output_surface_holder.get();
 186     display_->Initialize(output_surface_holder.Pass(), nullptr);
 187   }
 188   output_surface_->SetExternalStencilTest(stencil_enabled);
 189   display_->SetExternalClip(clip);
 190   display_->DrawAndSwap();
 191   gl_surface_->ResetBackingFrameBufferObject();
 192 }
 193
 194 void HardwareRenderer::ReturnResources(
 195     const cc::ReturnedResourceArray& resources) {
 196   shared_renderer_state_->InsertReturnedResourcesOnRT(resources);
 197 }
 198
 199 }  // namespace android_webview