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https://github.com/encounter/engine.git
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Chinmay Garde
45 lines
1.2 KiB
C++
45 lines
1.2 KiB
C++
// Copyright 2015 The Chromium 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/transform_layer.h"
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namespace flow {
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TransformLayer::TransformLayer() = default;
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TransformLayer::~TransformLayer() = default;
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void TransformLayer::Preroll(PrerollContext* context, const SkMatrix& matrix) {
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SkMatrix child_matrix;
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child_matrix.setConcat(matrix, transform_);
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SkRect child_paint_bounds = SkRect::MakeEmpty();
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PrerollChildren(context, child_matrix, &child_paint_bounds);
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transform_.mapRect(&child_paint_bounds);
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set_paint_bounds(child_paint_bounds);
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}
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#if defined(OS_FUCHSIA)
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void TransformLayer::UpdateScene(SceneUpdateContext& context) {
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FXL_DCHECK(needs_system_composite());
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SceneUpdateContext::Transform transform(context, transform_);
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UpdateSceneChildren(context);
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}
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#endif // defined(OS_FUCHSIA)
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void TransformLayer::Paint(PaintContext& context) const {
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TRACE_EVENT0("flutter", "TransformLayer::Paint");
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FXL_DCHECK(needs_painting());
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SkAutoCanvasRestore save(&context.canvas, true);
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context.canvas.concat(transform_);
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PaintChildren(context);
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}
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} // namespace flow
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