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73 lines
2.3 KiB
C++
73 lines
2.3 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_path_layer.h"
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#include "flutter/flow/paint_utils.h"
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#if defined(LEGACY_FUCHSIA_EMBEDDER)
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#include "lib/ui/scenic/cpp/commands.h"
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#endif
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namespace flutter {
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ClipPathLayer::ClipPathLayer(const SkPath& clip_path, Clip clip_behavior)
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: clip_path_(clip_path), clip_behavior_(clip_behavior) {
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FML_DCHECK(clip_behavior != Clip::none);
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}
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void ClipPathLayer::Preroll(PrerollContext* context, const SkMatrix& matrix) {
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TRACE_EVENT0("flutter", "ClipPathLayer::Preroll");
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SkRect previous_cull_rect = context->cull_rect;
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SkRect clip_path_bounds = clip_path_.getBounds();
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context->cull_rect.intersect(clip_path_bounds);
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Layer::AutoPrerollSaveLayerState save =
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Layer::AutoPrerollSaveLayerState::Create(context, UsesSaveLayer());
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context->mutators_stack.PushClipPath(clip_path_);
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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_path_bounds)) {
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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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context->cull_rect = previous_cull_rect;
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}
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#if defined(LEGACY_FUCHSIA_EMBEDDER)
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void ClipPathLayer::UpdateScene(std::shared_ptr<SceneUpdateContext> context) {
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TRACE_EVENT0("flutter", "ClipPathLayer::UpdateScene");
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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_path_.getBounds());
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UpdateSceneChildren(context);
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}
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#endif
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void ClipPathLayer::Paint(PaintContext& context) const {
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TRACE_EVENT0("flutter", "ClipPathLayer::Paint");
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FML_DCHECK(needs_painting(context));
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SkAutoCanvasRestore save(context.internal_nodes_canvas, true);
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context.internal_nodes_canvas->clipPath(clip_path_,
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clip_behavior_ != Clip::hardEdge);
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if (UsesSaveLayer()) {
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context.internal_nodes_canvas->saveLayer(paint_bounds(), nullptr);
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}
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PaintChildren(context);
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if (UsesSaveLayer()) {
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context.internal_nodes_canvas->restore();
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if (context.checkerboard_offscreen_layers) {
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DrawCheckerboard(context.internal_nodes_canvas, paint_bounds());
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}
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}
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}
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} // namespace flutter
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