1 /*
2 * Copyright 2017 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "SkSGDraw.h"
9
10 #include "SkPath.h"
11 #include "SkSGGeometryNode.h"
12 #include "SkSGInvalidationController.h"
13 #include "SkSGPaintNode.h"
14 #include "SkTLazy.h"
15
16 namespace sksg {
17
Draw(sk_sp<GeometryNode> geometry,sk_sp<PaintNode> paint)18 Draw::Draw(sk_sp<GeometryNode> geometry, sk_sp<PaintNode> paint)
19 : fGeometry(std::move(geometry))
20 , fPaint(std::move(paint)) {
21 this->observeInval(fGeometry);
22 this->observeInval(fPaint);
23 }
24
~Draw()25 Draw::~Draw() {
26 this->unobserveInval(fGeometry);
27 this->unobserveInval(fPaint);
28 }
29
onRender(SkCanvas * canvas,const RenderContext * ctx) const30 void Draw::onRender(SkCanvas* canvas, const RenderContext* ctx) const {
31 auto paint = fPaint->makePaint();
32 if (ctx) {
33 ctx->modulatePaint(&paint);
34 }
35
36 const auto skipDraw = paint.nothingToDraw() ||
37 (paint.getStyle() == SkPaint::kStroke_Style && paint.getStrokeWidth() <= 0);
38
39 if (!skipDraw) {
40 fGeometry->draw(canvas, paint);
41 }
42 }
43
onNodeAt(const SkPoint & p) const44 const RenderNode* Draw::onNodeAt(const SkPoint& p) const {
45 const auto paint = fPaint->makePaint();
46
47 if (!paint.getAlpha()) {
48 return nullptr;
49 }
50
51 if (paint.getStyle() == SkPaint::Style::kFill_Style && fGeometry->contains(p)) {
52 return this;
53 }
54
55 SkPath stroke_path;
56 if (!paint.getFillPath(fGeometry->asPath(), &stroke_path)) {
57 return nullptr;
58 }
59
60 return stroke_path.contains(p.x(), p.y()) ? this : nullptr;
61 }
62
onRevalidate(InvalidationController * ic,const SkMatrix & ctm)63 SkRect Draw::onRevalidate(InvalidationController* ic, const SkMatrix& ctm) {
64 SkASSERT(this->hasInval());
65
66 auto bounds = fGeometry->revalidate(ic, ctm);
67 fPaint->revalidate(ic, ctm);
68
69 const auto paint = fPaint->makePaint();
70 SkASSERT(paint.canComputeFastBounds());
71
72 return paint.computeFastBounds(bounds, &bounds);
73 }
74
75 } // namespace sksg
76