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   scoped_ptr<ChildFrame> child_frame =
  77       shared_renderer_state_->PassCompositorFrameOnRT();
  78   if (!child_frame.get())
  79     return;
  80   child_frame_ = child_frame.Pass();
  81   DCHECK(child_frame_->frame.get());
  82   DCHECK(!child_frame_->frame->gl_frame_data);
  83 }
  84
  85 void HardwareRenderer::DrawGL(bool stencil_enabled,
  86                               AwDrawGLInfo* draw_info) {
  87   TRACE_EVENT0("android_webview", "HardwareRenderer::DrawGL");
  88
  89   // We need to watch if the current Android context has changed and enforce
  90   // a clean-up in the compositor.
  91   EGLContext current_context = eglGetCurrentContext();
  92   DCHECK(current_context) << "DrawGL called without EGLContext";
  93
  94   // TODO(boliu): Handle context loss.
  95   if (last_egl_context_ != current_context)
  96     DLOG(WARNING) << "EGLContextChanged";
  97
  98   // SurfaceFactory::SubmitCompositorFrame might call glFlush. So calling it
  99   // during "kModeSync" stage (which does not allow GL) might result in extra
 100   // kModeProcess. Instead, submit the frame in "kModeDraw" stage to avoid
 101   // unnecessary kModeProcess.
 102   scoped_ptr<ChildFrame> child_frame = child_frame_.Pass();
 103   if (child_frame.get()) {
 104     scoped_ptr<cc::CompositorFrame> child_compositor_frame =
 105         child_frame->frame.Pass();
 106
 107     // On Android we put our browser layers in physical pixels and set our
 108     // browser CC device_scale_factor to 1, so suppress the transform between
 109     // DIP and pixels.
 110     child_compositor_frame->delegated_frame_data->device_scale_factor = 1.0f;
 111
 112     gfx::Size frame_size =
 113         child_compositor_frame->delegated_frame_data->render_pass_list.back()
 114             ->output_rect.size();
 115     bool size_changed = frame_size != frame_size_;
 116     frame_size_ = frame_size;
 117     if (child_id_.is_null() || size_changed) {
 118       if (!child_id_.is_null())
 119         surface_factory_->Destroy(child_id_);
 120       child_id_ = surface_id_allocator_->GenerateId();
 121       surface_factory_->Create(child_id_);
 122     }
 123
 124     surface_factory_->SubmitCompositorFrame(child_id_,
 125                                             child_compositor_frame.Pass(),
 126                                             cc::SurfaceFactory::DrawCallback());
 127   }
 128
 129   gfx::Transform transform(gfx::Transform::kSkipInitialization);
 130   transform.matrix().setColMajorf(draw_info->transform);
 131   transform.Translate(scroll_offset_.x(), scroll_offset_.y());
 132
 133   gfx::Size viewport(draw_info->width, draw_info->height);
 134   // Need to post the new transform matrix back to child compositor
 135   // because there is no onDraw during a Render Thread animation, and child
 136   // compositor might not have the tiles rasterized as the animation goes on.
 137   ParentCompositorDrawConstraints draw_constraints(
 138       draw_info->is_layer, transform, viewport.IsEmpty());
 139   if (!child_frame.get() || draw_constraints.NeedUpdate(*child_frame)) {
 140     shared_renderer_state_->PostExternalDrawConstraintsToChildCompositorOnRT(
 141         draw_constraints);
 142   }
 143
 144   if (child_id_.is_null())
 145     return;
 146
 147   gfx::Rect clip(draw_info->clip_left, draw_info->clip_top,
 148                  draw_info->clip_right - draw_info->clip_left,
 149                  draw_info->clip_bottom - draw_info->clip_top);
 150
 151   // Create a frame with a single SurfaceDrawQuad referencing the child
 152   // Surface and transformed using the given transform.
 153   scoped_ptr<cc::RenderPass> render_pass = cc::RenderPass::Create();
 154   render_pass->SetAll(cc::RenderPassId(1, 1), gfx::Rect(viewport), clip,
 155                       gfx::Transform(), true);
 156
 157   cc::SharedQuadState* quad_state =
 158       render_pass->CreateAndAppendSharedQuadState();
 159   quad_state->quad_to_target_transform = transform;
 160   quad_state->quad_layer_bounds = frame_size_;
 161   quad_state->visible_quad_layer_rect = gfx::Rect(frame_size_);
 162   quad_state->opacity = 1.f;
 163
 164   cc::SurfaceDrawQuad* surface_quad =
 165       render_pass->CreateAndAppendDrawQuad<cc::SurfaceDrawQuad>();
 166   surface_quad->SetNew(quad_state, gfx::Rect(quad_state->quad_layer_bounds),
 167                        gfx::Rect(quad_state->quad_layer_bounds), child_id_);
 168
 169   scoped_ptr<cc::DelegatedFrameData> delegated_frame(
 170       new cc::DelegatedFrameData);
 171   delegated_frame->render_pass_list.push_back(render_pass.Pass());
 172   scoped_ptr<cc::CompositorFrame> frame(new cc::CompositorFrame);
 173   frame->delegated_frame_data = delegated_frame.Pass();
 174
 175   if (root_id_.is_null()) {
 176     root_id_ = surface_id_allocator_->GenerateId();
 177     surface_factory_->Create(root_id_);
 178     display_->SetSurfaceId(root_id_, 1.f);
 179   }
 180   surface_factory_->SubmitCompositorFrame(root_id_, frame.Pass(),
 181                                           cc::SurfaceFactory::DrawCallback());
 182
 183   display_->Resize(viewport);
 184
 185   if (!output_surface_) {
 186     scoped_refptr<cc::ContextProvider> context_provider =
 187         AwRenderThreadContextProvider::Create(
 188             gl_surface_, DeferredGpuCommandService::GetInstance());
 189     scoped_ptr<ParentOutputSurface> output_surface_holder(
 190         new ParentOutputSurface(context_provider));
 191     output_surface_ = output_surface_holder.get();
 192     display_->Initialize(output_surface_holder.Pass(), nullptr);
 193   }
 194   output_surface_->SetExternalStencilTest(stencil_enabled);
 195   display_->SetExternalClip(clip);
 196   display_->DrawAndSwap();
 197 }
 198
 199 void HardwareRenderer::ReturnResources(
 200     const cc::ReturnedResourceArray& resources) {
 201   shared_renderer_state_->InsertReturnedResourcesOnRT(resources);
 202 }
 203
 204 void HardwareRenderer::SetBackingFrameBufferObject(
 205     int framebuffer_binding_ext) {
 206   gl_surface_->SetBackingFrameBufferObject(framebuffer_binding_ext);
 207 }
 208
 209 }  // namespace android_webview