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https://github.com/encounter/engine.git
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mikejurka
1f7bb9d0c1
A previous version of this change also removed system compositing of PhysicalShapeLayers on Fuchsia. In this reland, keep using system composting for PhysicalShapeLayers. Co-authored-by: David Worsham <arbreng@gmail.com>
54 lines
1.7 KiB
C++
54 lines
1.7 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/flow/layers/child_scene_layer.h"
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#include "flutter/flow/view_holder.h"
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namespace flutter {
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ChildSceneLayer::ChildSceneLayer(zx_koid_t layer_id,
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const SkPoint& offset,
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const SkSize& size,
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bool hit_testable)
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: layer_id_(layer_id),
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offset_(offset),
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size_(size),
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hit_testable_(hit_testable) {}
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void ChildSceneLayer::Preroll(PrerollContext* context, const SkMatrix& matrix) {
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TRACE_EVENT0("flutter", "ChildSceneLayer::Preroll");
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set_needs_system_composite(true);
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// An alpha "hole punch" is required if the frame behind us is not opaque.
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if (!context->is_opaque) {
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set_paint_bounds(
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SkRect::MakeXYWH(offset_.fX, offset_.fY, size_.fWidth, size_.fHeight));
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}
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}
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void ChildSceneLayer::Paint(PaintContext& context) const {
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TRACE_EVENT0("flutter", "ChildSceneLayer::Paint");
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FML_DCHECK(needs_painting());
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// If we are being rendered into our own frame using the system compositor,
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// then it is neccesary to "punch a hole" in the canvas/frame behind us so
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// that group opacity looks correct.
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SkPaint paint;
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paint.setColor(SK_ColorTRANSPARENT);
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paint.setBlendMode(SkBlendMode::kSrc);
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context.leaf_nodes_canvas->drawRect(paint_bounds(), paint);
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}
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void ChildSceneLayer::UpdateScene(SceneUpdateContext& context) {
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FML_DCHECK(needs_system_composite());
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auto* view_holder = ViewHolder::FromId(layer_id_);
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FML_DCHECK(view_holder);
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view_holder->UpdateScene(context, offset_, size_, hit_testable_);
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}
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} // namespace flutter
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