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92abb22c64
This reverts commit ef9e7b1a1365c07ab0df2e2016c4442c3963c2c7 with the following changes to accommodate an embedder for whom the original optimizations caused issues: * Ensure stable order in the backing stores presented to the embedder. This is a pessimization that will be reverted when the embedder migrates. Tracked in https://github.com/flutter/flutter/issues/51228 * Forego the optimization where the unused layers would be collected before allocation of new layers needs to happen. This is a pessimization that will be reverted when the embedder migrates. Tracked in https://github.com/flutter/flutter/issues/51229 More context in b/146142979.
108 lines
3.2 KiB
C++
108 lines
3.2 KiB
C++
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "flutter/shell/platform/embedder/embedder_external_view.h"
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#include "flutter/fml/trace_event.h"
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#include "flutter/shell/common/canvas_spy.h"
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namespace flutter {
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static SkISize TransformedSurfaceSize(const SkISize& size,
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const SkMatrix& transformation) {
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const auto source_rect = SkRect::MakeWH(size.width(), size.height());
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const auto transformed_rect = transformation.mapRect(source_rect);
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return SkISize::Make(transformed_rect.width(), transformed_rect.height());
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}
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EmbedderExternalView::EmbedderExternalView(
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const SkISize& frame_size,
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const SkMatrix& surface_transformation)
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: EmbedderExternalView(frame_size, surface_transformation, {}, nullptr) {}
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EmbedderExternalView::EmbedderExternalView(
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const SkISize& frame_size,
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const SkMatrix& surface_transformation,
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ViewIdentifier view_identifier,
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std::unique_ptr<EmbeddedViewParams> params)
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: render_surface_size_(
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TransformedSurfaceSize(frame_size, surface_transformation)),
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surface_transformation_(surface_transformation),
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view_identifier_(view_identifier),
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embedded_view_params_(std::move(params)),
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recorder_(std::make_unique<SkPictureRecorder>()),
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canvas_spy_(std::make_unique<CanvasSpy>(
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recorder_->beginRecording(frame_size.width(), frame_size.height()))) {
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}
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EmbedderExternalView::~EmbedderExternalView() = default;
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EmbedderExternalView::RenderTargetDescriptor
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EmbedderExternalView::CreateRenderTargetDescriptor() const {
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return {view_identifier_, render_surface_size_};
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}
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SkCanvas* EmbedderExternalView::GetCanvas() const {
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return canvas_spy_->GetSpyingCanvas();
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}
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SkISize EmbedderExternalView::GetRenderSurfaceSize() const {
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return render_surface_size_;
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}
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bool EmbedderExternalView::IsRootView() const {
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return !HasPlatformView();
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}
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bool EmbedderExternalView::HasPlatformView() const {
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return view_identifier_.platform_view_id.has_value();
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}
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bool EmbedderExternalView::HasEngineRenderedContents() const {
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return canvas_spy_->DidDrawIntoCanvas();
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}
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EmbedderExternalView::ViewIdentifier EmbedderExternalView::GetViewIdentifier()
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const {
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return view_identifier_;
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}
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const EmbeddedViewParams* EmbedderExternalView::GetEmbeddedViewParams() const {
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return embedded_view_params_.get();
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}
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bool EmbedderExternalView::Render(const EmbedderRenderTarget& render_target) {
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TRACE_EVENT0("flutter", "EmbedderExternalView::Render");
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FML_DCHECK(HasEngineRenderedContents())
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<< "Unnecessarily asked to render into a render target when there was "
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"nothing to render.";
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auto picture = recorder_->finishRecordingAsPicture();
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if (!picture) {
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return false;
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}
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auto surface = render_target.GetRenderSurface();
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if (!surface) {
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return false;
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}
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FML_DCHECK(SkISize::Make(surface->width(), surface->height()) ==
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render_surface_size_);
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auto canvas = surface->getCanvas();
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if (!canvas) {
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return false;
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}
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canvas->setMatrix(surface_transformation_);
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canvas->clear(SK_ColorTRANSPARENT);
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canvas->drawPicture(picture);
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canvas->flush();
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return true;
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}
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} // namespace flutter
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