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// Copyright 2017 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "cobalt/renderer/rasterizer/egl/hardware_rasterizer.h"
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include "base/debug/trace_event.h"
#include "base/memory/scoped_vector.h"
#include "base/threading/thread_checker.h"
#include "cobalt/render_tree/filter_node.h"
#include "cobalt/renderer/backend/egl/framebuffer_render_target.h"
#include "cobalt/renderer/backend/egl/graphics_context.h"
#include "cobalt/renderer/backend/egl/graphics_system.h"
#include "cobalt/renderer/backend/egl/texture.h"
#include "cobalt/renderer/backend/egl/utils.h"
#include "cobalt/renderer/rasterizer/egl/draw_object_manager.h"
#include "cobalt/renderer/rasterizer/egl/graphics_state.h"
#include "cobalt/renderer/rasterizer/egl/offscreen_target_manager.h"
#include "cobalt/renderer/rasterizer/egl/render_tree_node_visitor.h"
#include "cobalt/renderer/rasterizer/egl/shader_program_manager.h"
#include "cobalt/renderer/rasterizer/skia/cobalt_skia_type_conversions.h"
#include "cobalt/renderer/rasterizer/skia/hardware_rasterizer.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkRefCnt.h"
#include "third_party/skia/include/core/SkSurface.h"
#include "third_party/skia/include/gpu/GrContext.h"
namespace cobalt {
namespace renderer {
namespace rasterizer {
namespace egl {
class HardwareRasterizer::Impl {
public:
explicit Impl(backend::GraphicsContext* graphics_context,
int skia_atlas_width, int skia_atlas_height,
int skia_cache_size_in_bytes,
int scratch_surface_cache_size_in_bytes,
int surface_cache_size_in_bytes,
bool purge_skia_font_caches_on_destruction);
~Impl();
void Submit(const scoped_refptr<render_tree::Node>& render_tree,
const scoped_refptr<backend::RenderTarget>& render_target,
const Options& options);
void SubmitToFallbackRasterizer(
const scoped_refptr<render_tree::Node>& render_tree,
SkCanvas* fallback_render_target, const math::Matrix3F& transform,
const math::RectF& scissor, float opacity, uint32_t rasterize_flags);
render_tree::ResourceProvider* GetResourceProvider() {
return fallback_rasterizer_->GetResourceProvider();
}
private:
GrContext* GetFallbackContext() {
return fallback_rasterizer_->GetGrContext();
}
void ResetFallbackContextDuringFrame();
void FlushFallbackOffscreenDraws();
void RasterizeTree(const scoped_refptr<render_tree::Node>& render_tree,
backend::RenderTargetEGL* render_target,
const math::Rect& content_rect);
SkSurface* CreateFallbackSurface(
const backend::RenderTarget* render_target);
scoped_ptr<skia::HardwareRasterizer> fallback_rasterizer_;
scoped_ptr<GraphicsState> graphics_state_;
scoped_ptr<ShaderProgramManager> shader_program_manager_;
scoped_ptr<OffscreenTargetManager> offscreen_target_manager_;
backend::GraphicsContextEGL* graphics_context_;
base::ThreadChecker thread_checker_;
};
HardwareRasterizer::Impl::Impl(backend::GraphicsContext* graphics_context,
int skia_atlas_width, int skia_atlas_height,
int skia_cache_size_in_bytes,
int scratch_surface_cache_size_in_bytes,
int surface_cache_size_in_bytes,
bool purge_skia_font_caches_on_destruction)
: fallback_rasterizer_(new skia::HardwareRasterizer(
graphics_context, skia_atlas_width, skia_atlas_height,
skia_cache_size_in_bytes, scratch_surface_cache_size_in_bytes,
0 /* fallback rasterizer should not use a surface cache */,
purge_skia_font_caches_on_destruction)),
graphics_context_(
base::polymorphic_downcast<backend::GraphicsContextEGL*>(
graphics_context)) {
DLOG(INFO) << "surface_cache_size_in_bytes: " << surface_cache_size_in_bytes;
backend::GraphicsContextEGL::ScopedMakeCurrent scoped_make_current(
graphics_context_);
graphics_state_.reset(new GraphicsState());
shader_program_manager_.reset(new ShaderProgramManager());
offscreen_target_manager_.reset(new OffscreenTargetManager(
graphics_context_,
base::Bind(&HardwareRasterizer::Impl::CreateFallbackSurface,
base::Unretained(this)),
surface_cache_size_in_bytes));
}
HardwareRasterizer::Impl::~Impl() {
backend::GraphicsContextEGL::ScopedMakeCurrent scoped_make_current(
graphics_context_);
GL_CALL(glFinish());
offscreen_target_manager_.reset();
shader_program_manager_.reset();
graphics_state_.reset();
}
void HardwareRasterizer::Impl::Submit(
const scoped_refptr<render_tree::Node>& render_tree,
const scoped_refptr<backend::RenderTarget>& render_target,
const Options& options) {
DCHECK(thread_checker_.CalledOnValidThread());
backend::RenderTargetEGL* render_target_egl =
base::polymorphic_downcast<backend::RenderTargetEGL*>(
render_target.get());
backend::GraphicsContextEGL::ScopedMakeCurrent scoped_make_current(
graphics_context_, render_target_egl);
fallback_rasterizer_->AdvanceFrame();
// Update only the dirty pixels if the render target contents are preserved
// between frames.
math::Rect content_rect(render_target->GetSize());
if (options.dirty && render_target_egl->ContentWasPreservedAfterSwap()) {
content_rect = *options.dirty;
}
offscreen_target_manager_->Update(render_target->GetSize());
RasterizeTree(render_tree, render_target_egl, content_rect);
graphics_context_->SwapBuffers(render_target_egl);
}
void HardwareRasterizer::Impl::SubmitToFallbackRasterizer(
const scoped_refptr<render_tree::Node>& render_tree,
SkCanvas* fallback_render_target, const math::Matrix3F& transform,
const math::RectF& scissor, float opacity, uint32_t rasterize_flags) {
DCHECK(thread_checker_.CalledOnValidThread());
TRACE_EVENT0("cobalt::renderer", "SubmitToFallbackRasterizer");
// Use skia to rasterize to the allocated offscreen target.
fallback_render_target->save();
fallback_render_target->clipRect(SkRect::MakeXYWH(
scissor.x(), scissor.y(), scissor.width(), scissor.height()));
fallback_render_target->concat(skia::CobaltMatrixToSkia(transform));
if ((rasterize_flags & RenderTreeNodeVisitor::kFallbackShouldClear) != 0) {
fallback_render_target->clear(SK_ColorTRANSPARENT);
}
if (opacity < 1.0f) {
scoped_refptr<render_tree::Node> opacity_node =
new render_tree::FilterNode(render_tree::OpacityFilter(opacity),
render_tree);
fallback_rasterizer_->SubmitOffscreen(opacity_node, fallback_render_target);
} else {
fallback_rasterizer_->SubmitOffscreen(render_tree, fallback_render_target);
}
if ((rasterize_flags & RenderTreeNodeVisitor::kFallbackShouldFlush) != 0) {
fallback_render_target->flush();
}
fallback_render_target->restore();
}
void HardwareRasterizer::Impl::FlushFallbackOffscreenDraws() {
TRACE_EVENT0("cobalt::renderer", "Skia Flush");
offscreen_target_manager_->Flush();
}
void HardwareRasterizer::Impl::ResetFallbackContextDuringFrame() {
// Perform a minimal reset of the fallback context. Only need to invalidate
// states that this rasterizer pollutes.
uint32_t untouched_states = kMSAAEnable_GrGLBackendState |
kStencil_GrGLBackendState | kPixelStore_GrGLBackendState |
kFixedFunction_GrGLBackendState | kPathRendering_GrGLBackendState |
kMisc_GrGLBackendState;
GetFallbackContext()->resetContext(~untouched_states & kAll_GrBackendState);
}
void HardwareRasterizer::Impl::RasterizeTree(
const scoped_refptr<render_tree::Node>& render_tree,
backend::RenderTargetEGL* render_target,
const math::Rect& content_rect) {
DrawObjectManager draw_object_manager(
base::Bind(&HardwareRasterizer::Impl::ResetFallbackContextDuringFrame,
base::Unretained(this)),
base::Bind(&HardwareRasterizer::Impl::FlushFallbackOffscreenDraws,
base::Unretained(this)));
RenderTreeNodeVisitor visitor(
graphics_state_.get(), &draw_object_manager,
offscreen_target_manager_.get(),
base::Bind(&HardwareRasterizer::Impl::SubmitToFallbackRasterizer,
base::Unretained(this)),
fallback_rasterizer_->GetCachedCanvas(render_target),
render_target, content_rect);
// Traverse the render tree to populate the draw object manager.
{
TRACE_EVENT0("cobalt::renderer", "VisitRenderTree");
render_tree->Accept(&visitor);
}
graphics_state_->BeginFrame();
// Rasterize to offscreen targets using skia.
{
TRACE_EVENT0("cobalt::renderer", "OffscreenRasterize");
// Ensure the skia context is fully reset.
GetFallbackContext()->resetContext();
draw_object_manager.ExecuteOffscreenRasterize(graphics_state_.get(),
shader_program_manager_.get());
}
// Clear the dirty region of the render target.
graphics_state_->BindFramebuffer(render_target);
graphics_state_->Viewport(0, 0,
render_target->GetSize().width(),
render_target->GetSize().height());
graphics_state_->Scissor(content_rect.x(), content_rect.y(),
content_rect.width(), content_rect.height());
graphics_state_->Clear();
{
TRACE_EVENT0("cobalt::renderer", "OnscreenRasterize");
draw_object_manager.ExecuteOnscreenRasterize(graphics_state_.get(),
shader_program_manager_.get());
}
graphics_context_->ResetCurrentSurface();
graphics_state_->EndFrame();
}
SkSurface* HardwareRasterizer::Impl::CreateFallbackSurface(
const backend::RenderTarget* render_target) {
// Wrap the given render target in a new skia surface.
GrBackendRenderTargetDesc skia_desc;
skia_desc.fWidth = render_target->GetSize().width();
skia_desc.fHeight = render_target->GetSize().height();
skia_desc.fConfig = kRGBA_8888_GrPixelConfig;
skia_desc.fOrigin = kBottomLeft_GrSurfaceOrigin;
skia_desc.fSampleCnt = 0;
skia_desc.fStencilBits = 0;
skia_desc.fRenderTargetHandle = render_target->GetPlatformHandle();
SkAutoTUnref<GrRenderTarget> skia_render_target(
GetFallbackContext()->wrapBackendRenderTarget(skia_desc));
SkSurfaceProps skia_surface_props(
SkSurfaceProps::kUseDistanceFieldFonts_Flag,
SkSurfaceProps::kLegacyFontHost_InitType);
return SkSurface::NewRenderTargetDirect(
skia_render_target, &skia_surface_props);
}
HardwareRasterizer::HardwareRasterizer(
backend::GraphicsContext* graphics_context, int skia_atlas_width,
int skia_atlas_height, int skia_cache_size_in_bytes,
int scratch_surface_cache_size_in_bytes, int surface_cache_size_in_bytes,
bool purge_skia_font_caches_on_destruction)
: impl_(new Impl(
graphics_context, skia_atlas_width, skia_atlas_height,
skia_cache_size_in_bytes, scratch_surface_cache_size_in_bytes,
surface_cache_size_in_bytes, purge_skia_font_caches_on_destruction)) {
}
void HardwareRasterizer::Submit(
const scoped_refptr<render_tree::Node>& render_tree,
const scoped_refptr<backend::RenderTarget>& render_target,
const Options& options) {
TRACE_EVENT0("cobalt::renderer", "HardwareRasterizer::Submit");
impl_->Submit(render_tree, render_target, options);
}
render_tree::ResourceProvider* HardwareRasterizer::GetResourceProvider() {
return impl_->GetResourceProvider();
}
} // namespace egl
} // namespace rasterizer
} // namespace renderer
} // namespace cobalt