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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "android_webview/browser/surfaces_instance.h"
#include <algorithm>
#include <utility>
#include "android_webview/browser/aw_gl_surface.h"
#include "android_webview/browser/aw_render_thread_context_provider.h"
#include "android_webview/browser/deferred_gpu_command_service.h"
#include "android_webview/browser/parent_output_surface.h"
#include "base/memory/ptr_util.h"
#include "cc/output/renderer_settings.h"
#include "cc/output/texture_mailbox_deleter.h"
#include "cc/quads/surface_draw_quad.h"
#include "cc/scheduler/begin_frame_source.h"
#include "cc/surfaces/display.h"
#include "cc/surfaces/display_scheduler.h"
#include "cc/surfaces/surface_factory.h"
#include "cc/surfaces/surface_id_allocator.h"
#include "cc/surfaces/surface_manager.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/transform.h"
namespace android_webview {
namespace {
SurfacesInstance* g_surfaces_instance = nullptr;
} // namespace
// static
scoped_refptr<SurfacesInstance> SurfacesInstance::GetOrCreateInstance() {
if (g_surfaces_instance)
return make_scoped_refptr(g_surfaces_instance);
return make_scoped_refptr(new SurfacesInstance);
}
SurfacesInstance::SurfacesInstance()
: next_client_id_(1u), frame_sink_id_(AllocateFrameSinkId()) {
cc::RendererSettings settings;
// Should be kept in sync with compositor_impl_android.cc.
settings.allow_antialiasing = false;
settings.highp_threshold_min = 2048;
// Webview does not own the surface so should not clear it.
settings.should_clear_root_render_pass = false;
surface_manager_.reset(new cc::SurfaceManager);
surface_id_allocator_.reset(new cc::SurfaceIdAllocator());
surface_manager_->RegisterFrameSinkId(frame_sink_id_);
surface_factory_.reset(
new cc::SurfaceFactory(frame_sink_id_, surface_manager_.get(), this));
begin_frame_source_.reset(new cc::StubBeginFrameSource);
std::unique_ptr<cc::TextureMailboxDeleter> texture_mailbox_deleter(
new cc::TextureMailboxDeleter(nullptr));
std::unique_ptr<ParentOutputSurface> output_surface_holder(
new ParentOutputSurface(AwRenderThreadContextProvider::Create(
make_scoped_refptr(new AwGLSurface),
DeferredGpuCommandService::GetInstance())));
output_surface_ = output_surface_holder.get();
std::unique_ptr<cc::DisplayScheduler> scheduler(new cc::DisplayScheduler(
nullptr, output_surface_holder->capabilities().max_frames_pending));
display_.reset(new cc::Display(
nullptr /* shared_bitmap_manager */,
nullptr /* gpu_memory_buffer_manager */, settings, frame_sink_id_,
begin_frame_source_.get(), std::move(output_surface_holder),
std::move(scheduler), std::move(texture_mailbox_deleter)));
display_->Initialize(this, surface_manager_.get());
display_->SetVisible(true);
DCHECK(!g_surfaces_instance);
g_surfaces_instance = this;
}
SurfacesInstance::~SurfacesInstance() {
DCHECK_EQ(g_surfaces_instance, this);
g_surfaces_instance = nullptr;
DCHECK(child_ids_.empty());
surface_factory_->EvictSurface();
surface_manager_->InvalidateFrameSinkId(frame_sink_id_);
}
void SurfacesInstance::DisplayOutputSurfaceLost() {
// Android WebView does not handle context loss.
LOG(FATAL) << "Render thread context loss";
}
cc::FrameSinkId SurfacesInstance::AllocateFrameSinkId() {
return cc::FrameSinkId(next_client_id_++, 0 /* sink_id */);
}
cc::SurfaceManager* SurfacesInstance::GetSurfaceManager() {
return surface_manager_.get();
}
void SurfacesInstance::DrawAndSwap(const gfx::Size& viewport,
const gfx::Rect& clip,
const gfx::Transform& transform,
const gfx::Size& frame_size,
const cc::SurfaceId& child_id) {
DCHECK(std::find(child_ids_.begin(), child_ids_.end(), child_id) !=
child_ids_.end());
// Create a frame with a single SurfaceDrawQuad referencing the child
// Surface and transformed using the given transform.
std::unique_ptr<cc::RenderPass> render_pass = cc::RenderPass::Create();
render_pass->SetNew(1, gfx::Rect(viewport), clip, gfx::Transform());
render_pass->has_transparent_background = false;
cc::SharedQuadState* quad_state =
render_pass->CreateAndAppendSharedQuadState();
quad_state->quad_to_target_transform = transform;
quad_state->quad_layer_bounds = frame_size;
quad_state->visible_quad_layer_rect = gfx::Rect(frame_size);
quad_state->clip_rect = clip;
quad_state->is_clipped = true;
quad_state->opacity = 1.f;
cc::SurfaceDrawQuad* surface_quad =
render_pass->CreateAndAppendDrawQuad<cc::SurfaceDrawQuad>();
surface_quad->SetNew(quad_state, gfx::Rect(quad_state->quad_layer_bounds),
gfx::Rect(quad_state->quad_layer_bounds), child_id);
cc::CompositorFrame frame;
frame.render_pass_list.push_back(std::move(render_pass));
frame.metadata.referenced_surfaces = child_ids_;
if (!root_id_.is_valid()) {
root_id_ = surface_id_allocator_->GenerateId();
display_->SetLocalFrameId(root_id_, 1.f);
}
surface_factory_->SubmitCompositorFrame(root_id_, std::move(frame),
cc::SurfaceFactory::DrawCallback());
display_->Resize(viewport);
display_->DrawAndSwap();
}
void SurfacesInstance::AddChildId(const cc::SurfaceId& child_id) {
DCHECK(std::find(child_ids_.begin(), child_ids_.end(), child_id) ==
child_ids_.end());
child_ids_.push_back(child_id);
if (root_id_.is_valid())
SetEmptyRootFrame();
}
void SurfacesInstance::RemoveChildId(const cc::SurfaceId& child_id) {
auto itr = std::find(child_ids_.begin(), child_ids_.end(), child_id);
DCHECK(itr != child_ids_.end());
child_ids_.erase(itr);
if (root_id_.is_valid())
SetEmptyRootFrame();
}
void SurfacesInstance::SetEmptyRootFrame() {
cc::CompositorFrame empty_frame;
empty_frame.metadata.referenced_surfaces = child_ids_;
surface_factory_->SubmitCompositorFrame(root_id_, std::move(empty_frame),
cc::SurfaceFactory::DrawCallback());
}
void SurfacesInstance::ReturnResources(
const cc::ReturnedResourceArray& resources) {
// Root surface should have no resources to return.
CHECK(resources.empty());
}
void SurfacesInstance::SetBeginFrameSource(
cc::BeginFrameSource* begin_frame_source) {
// Parent compsitor calls DrawAndSwap directly and doesn't use
// BeginFrameSource.
}
} // namespace android_webview
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