android_webview/browser/hardware_renderer.cc - chromium/src - Git at Google

 // Copyright 2014 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/hardware_renderer.h"

 #include <utility>

 #include "android_webview/browser/aw_gl_surface.h"
 #include "android_webview/browser/aw_render_thread_context_provider.h"
 #include "android_webview/browser/child_frame.h"
 #include "android_webview/browser/deferred_gpu_command_service.h"
 #include "android_webview/browser/parent_compositor_draw_constraints.h"
 #include "android_webview/browser/parent_output_surface.h"
 #include "android_webview/browser/shared_renderer_state.h"
 #include "android_webview/public/browser/draw_gl.h"
 #include "base/auto_reset.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/trace_event/trace_event.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/output_surface.h"
 #include "cc/output/renderer_settings.h"
 #include "cc/quads/shared_quad_state.h"
 #include "cc/quads/surface_draw_quad.h"
 #include "cc/surfaces/display.h"
 #include "cc/surfaces/surface_factory.h"
 #include "cc/surfaces/surface_id_allocator.h"
 #include "gpu/command_buffer/client/gl_in_process_context.h"
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
 #include "ui/gfx/geometry/rect_conversions.h"
 #include "ui/gfx/geometry/rect_f.h"
 #include "ui/gfx/transform.h"
 #include "ui/gl/gl_bindings.h"

 namespace android_webview {

 HardwareRenderer::HardwareRenderer(SharedRendererState* state)
     : shared_renderer_state_(state),
       last_egl_context_(eglGetCurrentContext()),
       gl_surface_(new AwGLSurface),
       compositor_id_(0),  // Valid compositor id starts at 1.
       output_surface_(NULL) {
   DCHECK(last_egl_context_);

   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(1));
   display_.reset(new cc::Display(this, surface_manager_.get(), nullptr, nullptr,
                                  settings));
 }

 HardwareRenderer::~HardwareRenderer() {
   // Must reset everything before |surface_factory_| to ensure all
   // resources are returned before resetting.
   if (!root_id_.is_null())
     surface_factory_->Destroy(root_id_);
   if (!child_id_.is_null())
     surface_factory_->Destroy(child_id_);
   display_.reset();
   surface_factory_.reset();

   // Reset draw constraints.
   shared_renderer_state_->PostExternalDrawConstraintsToChildCompositorOnRT(
       ParentCompositorDrawConstraints());
   ReturnResourcesInChildFrame();
 }

 void HardwareRenderer::CommitFrame() {
   TRACE_EVENT0("android_webview", "CommitFrame");
   scroll_offset_ = shared_renderer_state_->GetScrollOffsetOnRT();
   scoped_ptr<ChildFrame> child_frame =
       shared_renderer_state_->PassCompositorFrameOnRT();
   if (!child_frame.get())
     return;

   ReturnResourcesInChildFrame();
   child_frame_ = std::move(child_frame);
   DCHECK(child_frame_->frame.get());
   DCHECK(!child_frame_->frame->gl_frame_data);
 }

 void HardwareRenderer::DrawGL(AwDrawGLInfo* draw_info,
                               const ScopedAppGLStateRestore& gl_state) {
   TRACE_EVENT0("android_webview", "HardwareRenderer::DrawGL");

   // We need to watch if the current Android context has changed and enforce
   // a clean-up in the compositor.
   EGLContext current_context = eglGetCurrentContext();
   DCHECK(current_context) << "DrawGL called without EGLContext";

   // TODO(boliu): Handle context loss.
   if (last_egl_context_ != current_context)
     DLOG(WARNING) << "EGLContextChanged";

   // SurfaceFactory::SubmitCompositorFrame might call glFlush. So calling it
   // during "kModeSync" stage (which does not allow GL) might result in extra
   // kModeProcess. Instead, submit the frame in "kModeDraw" stage to avoid
   // unnecessary kModeProcess.
   if (child_frame_.get() && child_frame_->frame.get()) {
     if (compositor_id_ != child_frame_->compositor_id) {
       if (!root_id_.is_null())
         surface_factory_->Destroy(root_id_);
       if (!child_id_.is_null())
         surface_factory_->Destroy(child_id_);

       root_id_ = cc::SurfaceId();
       child_id_ = cc::SurfaceId();

       // This will return all the resources to the previous compositor.
       surface_factory_.reset();
       compositor_id_ = child_frame_->compositor_id;
       surface_factory_.reset(
           new cc::SurfaceFactory(surface_manager_.get(), this));
     }

     scoped_ptr<cc::CompositorFrame> child_compositor_frame =
         std::move(child_frame_->frame);

     // On Android we put our browser layers in physical pixels and set our
     // browser CC device_scale_factor to 1, so suppress the transform between
     // DIP and pixels.
     child_compositor_frame->delegated_frame_data->device_scale_factor = 1.0f;

     gfx::Size frame_size =
         child_compositor_frame->delegated_frame_data->render_pass_list.back()
             ->output_rect.size();
     bool size_changed = frame_size != frame_size_;
     frame_size_ = frame_size;
     if (child_id_.is_null() || size_changed) {
       if (!child_id_.is_null())
         surface_factory_->Destroy(child_id_);
       child_id_ = surface_id_allocator_->GenerateId();
       surface_factory_->Create(child_id_);
     }

     surface_factory_->SubmitCompositorFrame(child_id_,
                                             std::move(child_compositor_frame),
                                             cc::SurfaceFactory::DrawCallback());
   }

   gfx::Transform transform(gfx::Transform::kSkipInitialization);
   transform.matrix().setColMajorf(draw_info->transform);
   transform.Translate(scroll_offset_.x(), scroll_offset_.y());

   gfx::Size viewport(draw_info->width, draw_info->height);
   // Need to post the new transform matrix back to child compositor
   // because there is no onDraw during a Render Thread animation, and child
   // compositor might not have the tiles rasterized as the animation goes on.
   ParentCompositorDrawConstraints draw_constraints(
       draw_info->is_layer, transform, viewport.IsEmpty());
   if (!child_frame_.get() || draw_constraints.NeedUpdate(*child_frame_)) {
     shared_renderer_state_->PostExternalDrawConstraintsToChildCompositorOnRT(
         draw_constraints);
   }

   if (child_id_.is_null())
     return;

   gfx::Rect clip(draw_info->clip_left, draw_info->clip_top,
                  draw_info->clip_right - draw_info->clip_left,
                  draw_info->clip_bottom - draw_info->clip_top);

   // Create a frame with a single SurfaceDrawQuad referencing the child
   // Surface and transformed using the given transform.
   scoped_ptr<cc::RenderPass> render_pass = cc::RenderPass::Create();
   render_pass->SetAll(cc::RenderPassId(1, 1), gfx::Rect(viewport), clip,
                       gfx::Transform(), 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->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_);

   scoped_ptr<cc::DelegatedFrameData> delegated_frame(
       new cc::DelegatedFrameData);
   delegated_frame->render_pass_list.push_back(std::move(render_pass));
   scoped_ptr<cc::CompositorFrame> frame(new cc::CompositorFrame);
   frame->delegated_frame_data = std::move(delegated_frame);

   if (root_id_.is_null()) {
     root_id_ = surface_id_allocator_->GenerateId();
     surface_factory_->Create(root_id_);
     display_->SetSurfaceId(root_id_, 1.f);
   }
   surface_factory_->SubmitCompositorFrame(root_id_, std::move(frame),
                                           cc::SurfaceFactory::DrawCallback());

   display_->Resize(viewport);

   if (!output_surface_) {
     scoped_refptr<cc::ContextProvider> context_provider =
         AwRenderThreadContextProvider::Create(
             gl_surface_, DeferredGpuCommandService::GetInstance());
     scoped_ptr<ParentOutputSurface> output_surface_holder(
         new ParentOutputSurface(context_provider));
     output_surface_ = output_surface_holder.get();
     display_->Initialize(std::move(output_surface_holder), nullptr);
   }
   output_surface_->SetGLState(gl_state);
   display_->SetExternalClip(clip);
   display_->DrawAndSwap();
 }

 void HardwareRenderer::ReturnResources(
     const cc::ReturnedResourceArray& resources) {
   ReturnResourcesToCompositor(resources, compositor_id_);
 }

 void HardwareRenderer::SetBeginFrameSource(
     cc::SurfaceId surface_id,
     cc::BeginFrameSource* begin_frame_source) {
   // TODO(tansell): Hook this up.
 }

 void HardwareRenderer::SetBackingFrameBufferObject(
     int framebuffer_binding_ext) {
   gl_surface_->SetBackingFrameBufferObject(framebuffer_binding_ext);
 }

 void HardwareRenderer::ReturnResourcesInChildFrame() {
   if (child_frame_.get() && child_frame_->frame.get()) {
     cc::ReturnedResourceArray resources_to_return;
     cc::TransferableResource::ReturnResources(
         child_frame_->frame->delegated_frame_data->resource_list,
         &resources_to_return);

     // The child frame's compositor id is not necessarily same as
     // compositor_id_.
     ReturnResourcesToCompositor(resources_to_return,
                                 child_frame_->compositor_id);
   }
   child_frame_.reset();
 }

 void HardwareRenderer::ReturnResourcesToCompositor(
     const cc::ReturnedResourceArray& resources,
     unsigned int compositor_id) {
   shared_renderer_state_->InsertReturnedResourcesOnRT(resources, compositor_id);
 }

 }  // namespace android_webview
	// Copyright 2014 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/hardware_renderer.h"

	#include <utility>

	#include "android_webview/browser/aw_gl_surface.h"
	#include "android_webview/browser/aw_render_thread_context_provider.h"
	#include "android_webview/browser/child_frame.h"
	#include "android_webview/browser/deferred_gpu_command_service.h"
	#include "android_webview/browser/parent_compositor_draw_constraints.h"
	#include "android_webview/browser/parent_output_surface.h"
	#include "android_webview/browser/shared_renderer_state.h"
	#include "android_webview/public/browser/draw_gl.h"
	#include "base/auto_reset.h"
	#include "base/strings/string_number_conversions.h"
	#include "base/trace_event/trace_event.h"
	#include "cc/output/compositor_frame.h"
	#include "cc/output/output_surface.h"
	#include "cc/output/renderer_settings.h"
	#include "cc/quads/shared_quad_state.h"
	#include "cc/quads/surface_draw_quad.h"
	#include "cc/surfaces/display.h"
	#include "cc/surfaces/surface_factory.h"
	#include "cc/surfaces/surface_id_allocator.h"
	#include "gpu/command_buffer/client/gl_in_process_context.h"
	#include "gpu/command_buffer/common/gles2_cmd_utils.h"
	#include "ui/gfx/geometry/rect_conversions.h"
	#include "ui/gfx/geometry/rect_f.h"
	#include "ui/gfx/transform.h"
	#include "ui/gl/gl_bindings.h"

	namespace android_webview {

	HardwareRenderer::HardwareRenderer(SharedRendererState* state)
	: shared_renderer_state_(state),
	last_egl_context_(eglGetCurrentContext()),
	gl_surface_(new AwGLSurface),
	compositor_id_(0), // Valid compositor id starts at 1.
	output_surface_(NULL) {
	DCHECK(last_egl_context_);

	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(1));
	display_.reset(new cc::Display(this, surface_manager_.get(), nullptr, nullptr,
	settings));
	}

	HardwareRenderer::~HardwareRenderer() {
	// Must reset everything before \|surface_factory_\| to ensure all
	// resources are returned before resetting.
	if (!root_id_.is_null())
	surface_factory_->Destroy(root_id_);
	if (!child_id_.is_null())
	surface_factory_->Destroy(child_id_);
	display_.reset();
	surface_factory_.reset();

	// Reset draw constraints.
	shared_renderer_state_->PostExternalDrawConstraintsToChildCompositorOnRT(
	ParentCompositorDrawConstraints());
	ReturnResourcesInChildFrame();
	}

	void HardwareRenderer::CommitFrame() {
	TRACE_EVENT0("android_webview", "CommitFrame");
	scroll_offset_ = shared_renderer_state_->GetScrollOffsetOnRT();
	scoped_ptr<ChildFrame> child_frame =
	shared_renderer_state_->PassCompositorFrameOnRT();
	if (!child_frame.get())
	return;

	ReturnResourcesInChildFrame();
	child_frame_ = std::move(child_frame);
	DCHECK(child_frame_->frame.get());
	DCHECK(!child_frame_->frame->gl_frame_data);
	}

	void HardwareRenderer::DrawGL(AwDrawGLInfo* draw_info,
	const ScopedAppGLStateRestore& gl_state) {
	TRACE_EVENT0("android_webview", "HardwareRenderer::DrawGL");

	// We need to watch if the current Android context has changed and enforce
	// a clean-up in the compositor.
	EGLContext current_context = eglGetCurrentContext();
	DCHECK(current_context) << "DrawGL called without EGLContext";

	// TODO(boliu): Handle context loss.
	if (last_egl_context_ != current_context)
	DLOG(WARNING) << "EGLContextChanged";

	// SurfaceFactory::SubmitCompositorFrame might call glFlush. So calling it
	// during "kModeSync" stage (which does not allow GL) might result in extra
	// kModeProcess. Instead, submit the frame in "kModeDraw" stage to avoid
	// unnecessary kModeProcess.
	if (child_frame_.get() && child_frame_->frame.get()) {
	if (compositor_id_ != child_frame_->compositor_id) {
	if (!root_id_.is_null())
	surface_factory_->Destroy(root_id_);
	if (!child_id_.is_null())
	surface_factory_->Destroy(child_id_);

	root_id_ = cc::SurfaceId();
	child_id_ = cc::SurfaceId();

	// This will return all the resources to the previous compositor.
	surface_factory_.reset();
	compositor_id_ = child_frame_->compositor_id;
	surface_factory_.reset(
	new cc::SurfaceFactory(surface_manager_.get(), this));
	}

	scoped_ptr<cc::CompositorFrame> child_compositor_frame =
	std::move(child_frame_->frame);

	// On Android we put our browser layers in physical pixels and set our
	// browser CC device_scale_factor to 1, so suppress the transform between
	// DIP and pixels.
	child_compositor_frame->delegated_frame_data->device_scale_factor = 1.0f;

	gfx::Size frame_size =
	child_compositor_frame->delegated_frame_data->render_pass_list.back()
	->output_rect.size();
	bool size_changed = frame_size != frame_size_;
	frame_size_ = frame_size;
	if (child_id_.is_null() \|\| size_changed) {
	if (!child_id_.is_null())
	surface_factory_->Destroy(child_id_);
	child_id_ = surface_id_allocator_->GenerateId();
	surface_factory_->Create(child_id_);
	}

	surface_factory_->SubmitCompositorFrame(child_id_,
	std::move(child_compositor_frame),
	cc::SurfaceFactory::DrawCallback());
	}

	gfx::Transform transform(gfx::Transform::kSkipInitialization);
	transform.matrix().setColMajorf(draw_info->transform);
	transform.Translate(scroll_offset_.x(), scroll_offset_.y());

	gfx::Size viewport(draw_info->width, draw_info->height);
	// Need to post the new transform matrix back to child compositor
	// because there is no onDraw during a Render Thread animation, and child
	// compositor might not have the tiles rasterized as the animation goes on.
	ParentCompositorDrawConstraints draw_constraints(
	draw_info->is_layer, transform, viewport.IsEmpty());
	if (!child_frame_.get() \|\| draw_constraints.NeedUpdate(*child_frame_)) {
	shared_renderer_state_->PostExternalDrawConstraintsToChildCompositorOnRT(
	draw_constraints);
	}

	if (child_id_.is_null())
	return;

	gfx::Rect clip(draw_info->clip_left, draw_info->clip_top,
	draw_info->clip_right - draw_info->clip_left,
	draw_info->clip_bottom - draw_info->clip_top);

	// Create a frame with a single SurfaceDrawQuad referencing the child
	// Surface and transformed using the given transform.
	scoped_ptr<cc::RenderPass> render_pass = cc::RenderPass::Create();
	render_pass->SetAll(cc::RenderPassId(1, 1), gfx::Rect(viewport), clip,
	gfx::Transform(), 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->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_);

	scoped_ptr<cc::DelegatedFrameData> delegated_frame(
	new cc::DelegatedFrameData);
	delegated_frame->render_pass_list.push_back(std::move(render_pass));
	scoped_ptr<cc::CompositorFrame> frame(new cc::CompositorFrame);
	frame->delegated_frame_data = std::move(delegated_frame);

	if (root_id_.is_null()) {
	root_id_ = surface_id_allocator_->GenerateId();
	surface_factory_->Create(root_id_);
	display_->SetSurfaceId(root_id_, 1.f);
	}
	surface_factory_->SubmitCompositorFrame(root_id_, std::move(frame),
	cc::SurfaceFactory::DrawCallback());

	display_->Resize(viewport);

	if (!output_surface_) {
	scoped_refptr<cc::ContextProvider> context_provider =
	AwRenderThreadContextProvider::Create(
	gl_surface_, DeferredGpuCommandService::GetInstance());
	scoped_ptr<ParentOutputSurface> output_surface_holder(
	new ParentOutputSurface(context_provider));
	output_surface_ = output_surface_holder.get();
	display_->Initialize(std::move(output_surface_holder), nullptr);
	}
	output_surface_->SetGLState(gl_state);
	display_->SetExternalClip(clip);
	display_->DrawAndSwap();
	}

	void HardwareRenderer::ReturnResources(
	const cc::ReturnedResourceArray& resources) {
	ReturnResourcesToCompositor(resources, compositor_id_);
	}

	void HardwareRenderer::SetBeginFrameSource(
	cc::SurfaceId surface_id,
	cc::BeginFrameSource* begin_frame_source) {
	// TODO(tansell): Hook this up.
	}

	void HardwareRenderer::SetBackingFrameBufferObject(
	int framebuffer_binding_ext) {
	gl_surface_->SetBackingFrameBufferObject(framebuffer_binding_ext);
	}

	void HardwareRenderer::ReturnResourcesInChildFrame() {
	if (child_frame_.get() && child_frame_->frame.get()) {
	cc::ReturnedResourceArray resources_to_return;
	cc::TransferableResource::ReturnResources(
	child_frame_->frame->delegated_frame_data->resource_list,
	&resources_to_return);

	// The child frame's compositor id is not necessarily same as
	// compositor_id_.
	ReturnResourcesToCompositor(resources_to_return,
	child_frame_->compositor_id);
	}
	child_frame_.reset();
	}

	void HardwareRenderer::ReturnResourcesToCompositor(
	const cc::ReturnedResourceArray& resources,
	unsigned int compositor_id) {
	shared_renderer_state_->InsertReturnedResourcesOnRT(resources, compositor_id);
	}

	} // namespace android_webview