blob: e94ffd53f53d722e3281b5d3ee532bfc9137b2d9 [file] [log] [blame]
// Copyright 2013 The Flutter 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 "flutter/flow/compositor_context.h"
#include "flutter/flow/layers/layer_tree.h"
#include "third_party/skia/include/core/SkCanvas.h"
namespace flutter {
CompositorContext::CompositorContext(fml::Milliseconds frame_budget)
: raster_time_(frame_budget), ui_time_(frame_budget) {}
CompositorContext::~CompositorContext() = default;
void CompositorContext::BeginFrame(ScopedFrame& frame,
bool enable_instrumentation) {
if (enable_instrumentation) {
frame_count_.Increment();
raster_time_.Start();
}
}
void CompositorContext::EndFrame(ScopedFrame& frame,
bool enable_instrumentation) {
raster_cache_.SweepAfterFrame();
if (enable_instrumentation) {
raster_time_.Stop();
}
}
std::unique_ptr<CompositorContext::ScopedFrame> CompositorContext::AcquireFrame(
GrContext* gr_context,
SkCanvas* canvas,
ExternalViewEmbedder* view_embedder,
const SkMatrix& root_surface_transformation,
bool instrumentation_enabled,
bool surface_supports_readback,
fml::RefPtr<fml::RasterThreadMerger> raster_thread_merger) {
return std::make_unique<ScopedFrame>(
*this, gr_context, canvas, view_embedder, root_surface_transformation,
instrumentation_enabled, surface_supports_readback, raster_thread_merger);
}
CompositorContext::ScopedFrame::ScopedFrame(
CompositorContext& context,
GrContext* gr_context,
SkCanvas* canvas,
ExternalViewEmbedder* view_embedder,
const SkMatrix& root_surface_transformation,
bool instrumentation_enabled,
bool surface_supports_readback,
fml::RefPtr<fml::RasterThreadMerger> raster_thread_merger)
: context_(context),
gr_context_(gr_context),
canvas_(canvas),
view_embedder_(view_embedder),
root_surface_transformation_(root_surface_transformation),
instrumentation_enabled_(instrumentation_enabled),
surface_supports_readback_(surface_supports_readback),
raster_thread_merger_(raster_thread_merger) {
context_.BeginFrame(*this, instrumentation_enabled_);
}
CompositorContext::ScopedFrame::~ScopedFrame() {
context_.EndFrame(*this, instrumentation_enabled_);
}
RasterStatus CompositorContext::ScopedFrame::Raster(
flutter::LayerTree& layer_tree,
bool ignore_raster_cache) {
TRACE_EVENT0("flutter", "CompositorContext::ScopedFrame::Raster");
bool root_needs_readback = layer_tree.Preroll(*this, ignore_raster_cache);
bool needs_save_layer = root_needs_readback && !surface_supports_readback();
PostPrerollResult post_preroll_result = PostPrerollResult::kSuccess;
if (view_embedder_ && raster_thread_merger_) {
post_preroll_result =
view_embedder_->PostPrerollAction(raster_thread_merger_);
}
if (post_preroll_result == PostPrerollResult::kResubmitFrame) {
return RasterStatus::kResubmit;
}
// Clearing canvas after preroll reduces one render target switch when preroll
// paints some raster cache.
if (canvas()) {
if (needs_save_layer) {
FML_LOG(INFO) << "Using SaveLayer to protect non-readback surface";
SkRect bounds = SkRect::Make(layer_tree.frame_size());
SkPaint paint;
paint.setBlendMode(SkBlendMode::kSrc);
canvas()->saveLayer(&bounds, &paint);
}
canvas()->clear(SK_ColorTRANSPARENT);
}
layer_tree.Paint(*this, ignore_raster_cache);
if (canvas() && needs_save_layer) {
canvas()->restore();
}
return RasterStatus::kSuccess;
}
void CompositorContext::OnGrContextCreated() {
texture_registry_.OnGrContextCreated();
raster_cache_.Clear();
}
void CompositorContext::OnGrContextDestroyed() {
texture_registry_.OnGrContextDestroyed();
raster_cache_.Clear();
}
} // namespace flutter