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