1// Copyright 2013 The Flutter Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "flutter/flow/layers/clip_rrect_layer.h"
6
7namespace flutter {
8
9ClipRRectLayer::ClipRRectLayer(const SkRRect& clip_rrect, Clip clip_behavior)
10 : clip_rrect_(clip_rrect), clip_behavior_(clip_behavior) {
11 FML_DCHECK(clip_behavior != Clip::none);
12}
13
14void ClipRRectLayer::Preroll(PrerollContext* context, const SkMatrix& matrix) {
15 TRACE_EVENT0("flutter", "ClipRRectLayer::Preroll");
16
17 SkRect previous_cull_rect = context->cull_rect;
18 SkRect clip_rrect_bounds = clip_rrect_.getBounds();
19 children_inside_clip_ = context->cull_rect.intersect(clip_rrect_bounds);
20 if (children_inside_clip_) {
21 TRACE_EVENT_INSTANT0("flutter", "children inside clip rect");
22
23 Layer::AutoPrerollSaveLayerState save =
24 Layer::AutoPrerollSaveLayerState::Create(context, UsesSaveLayer());
25 context->mutators_stack.PushClipRRect(clip_rrect_);
26 SkRect child_paint_bounds = SkRect::MakeEmpty();
27 PrerollChildren(context, matrix, &child_paint_bounds);
28
29 if (child_paint_bounds.intersect(clip_rrect_bounds)) {
30 set_paint_bounds(child_paint_bounds);
31 }
32 context->mutators_stack.Pop();
33 }
34 context->cull_rect = previous_cull_rect;
35}
36
37#if defined(LEGACY_FUCHSIA_EMBEDDER)
38
39void ClipRRectLayer::UpdateScene(SceneUpdateContext& context) {
40 TRACE_EVENT0("flutter", "ClipRRectLayer::UpdateScene");
41 FML_DCHECK(needs_system_composite());
42
43 // TODO(liyuqian): respect clip_behavior_
44 SceneUpdateContext::Clip clip(context, clip_rrect_.getBounds());
45 UpdateSceneChildren(context);
46}
47
48#endif
49
50void ClipRRectLayer::Paint(PaintContext& context) const {
51 TRACE_EVENT0("flutter", "ClipRRectLayer::Paint");
52 FML_DCHECK(needs_painting());
53
54 if (!children_inside_clip_) {
55 TRACE_EVENT_INSTANT0("flutter", "children not inside clip rect, skipping");
56 return;
57 }
58
59 SkAutoCanvasRestore save(context.internal_nodes_canvas, true);
60 context.internal_nodes_canvas->clipRRect(clip_rrect_,
61 clip_behavior_ != Clip::hardEdge);
62
63 if (UsesSaveLayer()) {
64 context.internal_nodes_canvas->saveLayer(paint_bounds(), nullptr);
65 }
66 PaintChildren(context);
67 if (UsesSaveLayer()) {
68 context.internal_nodes_canvas->restore();
69 }
70}
71
72} // namespace flutter
73