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7c3dcee2e9
This reverts commit fcc4ab32301396986dd5103d6d444bff35fe0f63. Fixes https://github.com/flutter/flutter/issues/41394 and other related correctness issues. TBR: @arbreng @jason-simmons @mehmetf
61 lines
1.9 KiB
C++
61 lines
1.9 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/clip_rect_layer.h"
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namespace flutter {
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ClipRectLayer::ClipRectLayer(const SkRect& clip_rect, Clip clip_behavior)
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: clip_rect_(clip_rect), clip_behavior_(clip_behavior) {
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FML_DCHECK(clip_behavior != Clip::none);
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}
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ClipRectLayer::~ClipRectLayer() = default;
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void ClipRectLayer::Preroll(PrerollContext* context, const SkMatrix& matrix) {
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SkRect previous_cull_rect = context->cull_rect;
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if (context->cull_rect.intersect(clip_rect_)) {
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context->mutators_stack.PushClipRect(clip_rect_);
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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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context->mutators_stack.Pop();
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}
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context->cull_rect = previous_cull_rect;
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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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FML_DCHECK(needs_system_composite());
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// TODO(liyuqian): respect clip_behavior_
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SceneUpdateContext::Clip clip(context, 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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FML_DCHECK(needs_painting());
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SkAutoCanvasRestore save(context.internal_nodes_canvas, true);
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context.internal_nodes_canvas->clipRect(clip_rect_,
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clip_behavior_ != Clip::hardEdge);
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if (clip_behavior_ == Clip::antiAliasWithSaveLayer) {
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context.internal_nodes_canvas->saveLayer(clip_rect_, nullptr);
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}
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PaintChildren(context);
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if (clip_behavior_ == Clip::antiAliasWithSaveLayer) {
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context.internal_nodes_canvas->restore();
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}
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}
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} // namespace flutter
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