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 "modules/sksg/include/SkSGDraw.h"
9
10 #include "include/core/SkCanvas.h"
11 #include "include/core/SkPath.h"
12 #include "include/core/SkPathUtils.h"
13 #include "modules/sksg/include/SkSGGeometryNode.h"
14 #include "modules/sksg/include/SkSGInvalidationController.h"
15 #include "modules/sksg/include/SkSGPaint.h"
16 #include "src/base/SkTLazy.h"
17
18 namespace sksg {
19
Draw(sk_sp<GeometryNode> geometry,sk_sp<PaintNode> paint)20 Draw::Draw(sk_sp<GeometryNode> geometry, sk_sp<PaintNode> paint)
21 : fGeometry(std::move(geometry))
22 , fPaint(std::move(paint)) {
23 this->observeInval(fGeometry);
24 this->observeInval(fPaint);
25 }
26
~Draw()27 Draw::~Draw() {
28 this->unobserveInval(fGeometry);
29 this->unobserveInval(fPaint);
30 }
31
onRender(SkCanvas * canvas,const RenderContext * ctx) const32 void Draw::onRender(SkCanvas* canvas, const RenderContext* ctx) const {
33 auto paint = fPaint->makePaint();
34 if (ctx) {
35 ctx->modulatePaint(canvas->getTotalMatrix(), &paint);
36 }
37
38 const auto skipDraw = paint.nothingToDraw() ||
39 (paint.getStyle() == SkPaint::kStroke_Style && paint.getStrokeWidth() <= 0);
40
41 if (!skipDraw) {
42 fGeometry->draw(canvas, paint);
43 }
44 }
45
onNodeAt(const SkPoint & p) const46 const RenderNode* Draw::onNodeAt(const SkPoint& p) const {
47 const auto paint = fPaint->makePaint();
48
49 if (!paint.getAlpha()) {
50 return nullptr;
51 }
52
53 if (paint.getStyle() == SkPaint::Style::kFill_Style && fGeometry->contains(p)) {
54 return this;
55 }
56
57 SkPath stroke_path;
58 if (!skpathutils::FillPathWithPaint(fGeometry->asPath(), paint, &stroke_path)) {
59 return nullptr;
60 }
61
62 return stroke_path.contains(p.x(), p.y()) ? this : nullptr;
63 }
64
onRevalidate(InvalidationController * ic,const SkMatrix & ctm)65 SkRect Draw::onRevalidate(InvalidationController* ic, const SkMatrix& ctm) {
66 SkASSERT(this->hasInval());
67
68 auto bounds = fGeometry->revalidate(ic, ctm);
69 fPaint->revalidate(ic, ctm);
70
71 const auto paint = fPaint->makePaint();
72 SkASSERT(paint.canComputeFastBounds());
73
74 return paint.computeFastBounds(bounds, &bounds);
75 }
76
77 } // namespace sksg
78