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48 lines
1.3 KiB
C++
48 lines
1.3 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/clip_rect_layer.h"
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namespace flow {
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ClipRectLayer::ClipRectLayer() = default;
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ClipRectLayer::~ClipRectLayer() = default;
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void ClipRectLayer::Preroll(PrerollContext* context, const SkMatrix& matrix) {
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SkRect child_paint_bounds = SkRect::MakeEmpty();
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PrerollChildren(context, matrix, &child_paint_bounds);
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if (child_paint_bounds.intersect(clip_rect_)) {
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set_paint_bounds(child_paint_bounds);
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}
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}
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#if defined(OS_FUCHSIA)
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void ClipRectLayer::UpdateScene(SceneUpdateContext& context) {
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FXL_DCHECK(needs_system_composite());
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scenic_lib::Rectangle shape(context.session(), // session
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clip_rect_.width(), // width
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clip_rect_.height() // height
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);
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SceneUpdateContext::Clip clip(context, shape, clip_rect_);
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UpdateSceneChildren(context);
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}
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#endif // defined(OS_FUCHSIA)
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void ClipRectLayer::Paint(PaintContext& context) const {
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TRACE_EVENT0("flutter", "ClipRectLayer::Paint");
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FXL_DCHECK(needs_painting());
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SkAutoCanvasRestore save(&context.canvas, true);
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context.canvas.clipRect(paint_bounds());
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PaintChildren(context);
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}
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} // namespace flow
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