1/*
2 * Copyright 2011 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 "src/core/SkDrawProcs.h"
9#include "src/gpu/GrCaps.h"
10#include "src/gpu/GrPaint.h"
11#include "src/gpu/GrPathRenderer.h"
12#include "src/gpu/GrRecordingContextPriv.h"
13#include "src/gpu/GrRenderTargetContext.h"
14#include "src/gpu/GrUserStencilSettings.h"
15#include "src/gpu/geometry/GrShape.h"
16
17#ifdef SK_DEBUG
18void GrPathRenderer::StencilPathArgs::validate() const {
19 SkASSERT(fContext);
20 SkASSERT(fRenderTargetContext);
21 SkASSERT(fClipConservativeBounds);
22 SkASSERT(fViewMatrix);
23 SkASSERT(fShape);
24 SkASSERT(fShape->style().isSimpleFill());
25 SkPath path;
26 fShape->asPath(&path);
27 SkASSERT(!path.isInverseFillType());
28}
29#endif
30
31//////////////////////////////////////////////////////////////////////////////
32
33GrPathRenderer::GrPathRenderer() {}
34
35GrPathRenderer::StencilSupport GrPathRenderer::getStencilSupport(const GrShape& shape) const {
36 SkDEBUGCODE(SkPath path;)
37 SkDEBUGCODE(shape.asPath(&path);)
38 SkASSERT(shape.style().isSimpleFill());
39 SkASSERT(!path.isInverseFillType());
40 return this->onGetStencilSupport(shape);
41}
42
43bool GrPathRenderer::drawPath(const DrawPathArgs& args) {
44#ifdef SK_DEBUG
45 args.validate();
46 CanDrawPathArgs canArgs;
47 canArgs.fCaps = args.fContext->priv().caps();
48 canArgs.fProxy = args.fRenderTargetContext->asRenderTargetProxy();
49 canArgs.fClipConservativeBounds = args.fClipConservativeBounds;
50 canArgs.fViewMatrix = args.fViewMatrix;
51 canArgs.fShape = args.fShape;
52 canArgs.fAAType = args.fAAType;
53 canArgs.fTargetIsWrappedVkSecondaryCB = args.fRenderTargetContext->wrapsVkSecondaryCB();
54 canArgs.validate();
55
56 canArgs.fHasUserStencilSettings = !args.fUserStencilSettings->isUnused();
57 SkASSERT(CanDrawPath::kNo != this->canDrawPath(canArgs));
58 if (!args.fUserStencilSettings->isUnused()) {
59 SkPath path;
60 args.fShape->asPath(&path);
61 SkASSERT(args.fShape->style().isSimpleFill());
62 SkASSERT(kNoRestriction_StencilSupport == this->getStencilSupport(*args.fShape));
63 }
64#endif
65 return this->onDrawPath(args);
66}
67
68bool GrPathRenderer::IsStrokeHairlineOrEquivalent(const GrStyle& style, const SkMatrix& matrix,
69 SkScalar* outCoverage) {
70 if (style.pathEffect()) {
71 return false;
72 }
73 const SkStrokeRec& stroke = style.strokeRec();
74 if (stroke.isHairlineStyle()) {
75 if (outCoverage) {
76 *outCoverage = SK_Scalar1;
77 }
78 return true;
79 }
80 return stroke.getStyle() == SkStrokeRec::kStroke_Style &&
81 SkDrawTreatAAStrokeAsHairline(stroke.getWidth(), matrix, outCoverage);
82}
83
84void GrPathRenderer::GetPathDevBounds(const SkPath& path,
85 SkISize devSize,
86 const SkMatrix& matrix,
87 SkRect* bounds) {
88 if (path.isInverseFillType()) {
89 *bounds = SkRect::Make(devSize);
90 return;
91 }
92 *bounds = path.getBounds();
93 matrix.mapRect(bounds);
94}
95
96void GrPathRenderer::onStencilPath(const StencilPathArgs& args) {
97 static constexpr GrUserStencilSettings kIncrementStencil(
98 GrUserStencilSettings::StaticInit<
99 0xffff,
100 GrUserStencilTest::kAlways,
101 0xffff,
102 GrUserStencilOp::kReplace,
103 GrUserStencilOp::kReplace,
104 0xffff>()
105 );
106
107 GrPaint paint;
108 DrawPathArgs drawArgs{args.fContext,
109 std::move(paint),
110 &kIncrementStencil,
111 args.fRenderTargetContext,
112 nullptr, // clip
113 args.fClipConservativeBounds,
114 args.fViewMatrix,
115 args.fShape,
116 (GrAA::kYes == args.fDoStencilMSAA) ? GrAAType::kMSAA : GrAAType::kNone,
117 false};
118 this->drawPath(drawArgs);
119}
120