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 "include/gpu/GrRecordingContext.h"
9#include "src/core/SkDrawProcs.h"
10#include "src/gpu/GrCaps.h"
11#include "src/gpu/GrPaint.h"
12#include "src/gpu/GrPathRenderer.h"
13#include "src/gpu/GrRecordingContextPriv.h"
14#include "src/gpu/GrRenderTargetContext.h"
15#include "src/gpu/GrUserStencilSettings.h"
16#include "src/gpu/geometry/GrStyledShape.h"
17
18#ifdef SK_DEBUG
19void GrPathRenderer::StencilPathArgs::validate() const {
20 SkASSERT(fContext);
21 SkASSERT(fRenderTargetContext);
22 SkASSERT(fClipConservativeBounds);
23 SkASSERT(fViewMatrix);
24 SkASSERT(fShape);
25 SkASSERT(fShape->style().isSimpleFill());
26 SkPath path;
27 fShape->asPath(&path);
28 SkASSERT(!path.isInverseFillType());
29}
30#endif
31
32//////////////////////////////////////////////////////////////////////////////
33
34GrPathRenderer::GrPathRenderer() {}
35
36GrPathRenderer::StencilSupport GrPathRenderer::getStencilSupport(const GrStyledShape& shape) const {
37 SkDEBUGCODE(SkPath path;)
38 SkDEBUGCODE(shape.asPath(&path);)
39 SkASSERT(shape.style().isSimpleFill());
40 SkASSERT(!path.isInverseFillType());
41 return this->onGetStencilSupport(shape);
42}
43
44bool GrPathRenderer::drawPath(const DrawPathArgs& args) {
45#ifdef SK_DEBUG
46 args.validate();
47 CanDrawPathArgs canArgs;
48 canArgs.fCaps = args.fContext->priv().caps();
49 canArgs.fProxy = args.fRenderTargetContext->asRenderTargetProxy();
50 canArgs.fClipConservativeBounds = args.fClipConservativeBounds;
51 canArgs.fViewMatrix = args.fViewMatrix;
52 canArgs.fShape = args.fShape;
53 canArgs.fPaint = &args.fPaint;
54 canArgs.fAAType = args.fAAType;
55 canArgs.fTargetIsWrappedVkSecondaryCB = args.fRenderTargetContext->wrapsVkSecondaryCB();
56 canArgs.validate();
57
58 canArgs.fHasUserStencilSettings = !args.fUserStencilSettings->isUnused();
59 SkASSERT(CanDrawPath::kNo != this->canDrawPath(canArgs));
60 if (!args.fUserStencilSettings->isUnused()) {
61 SkPath path;
62 args.fShape->asPath(&path);
63 SkASSERT(args.fShape->style().isSimpleFill());
64 SkASSERT(kNoRestriction_StencilSupport == this->getStencilSupport(*args.fShape));
65 }
66#endif
67 return this->onDrawPath(args);
68}
69
70bool GrPathRenderer::IsStrokeHairlineOrEquivalent(const GrStyle& style, const SkMatrix& matrix,
71 SkScalar* outCoverage) {
72 if (style.pathEffect()) {
73 return false;
74 }
75 const SkStrokeRec& stroke = style.strokeRec();
76 if (stroke.isHairlineStyle()) {
77 if (outCoverage) {
78 *outCoverage = SK_Scalar1;
79 }
80 return true;
81 }
82 return stroke.getStyle() == SkStrokeRec::kStroke_Style &&
83 SkDrawTreatAAStrokeAsHairline(stroke.getWidth(), matrix, outCoverage);
84}
85
86void GrPathRenderer::GetPathDevBounds(const SkPath& path,
87 SkISize devSize,
88 const SkMatrix& matrix,
89 SkRect* bounds) {
90 if (path.isInverseFillType()) {
91 *bounds = SkRect::Make(devSize);
92 return;
93 }
94 *bounds = path.getBounds();
95 matrix.mapRect(bounds);
96}
97
98void GrPathRenderer::onStencilPath(const StencilPathArgs& args) {
99 static constexpr GrUserStencilSettings kIncrementStencil(
100 GrUserStencilSettings::StaticInit<
101 0xffff,
102 GrUserStencilTest::kAlways,
103 0xffff,
104 GrUserStencilOp::kReplace,
105 GrUserStencilOp::kReplace,
106 0xffff>()
107 );
108
109 GrPaint paint;
110 DrawPathArgs drawArgs{args.fContext,
111 std::move(paint),
112 &kIncrementStencil,
113 args.fRenderTargetContext,
114 nullptr, // clip
115 args.fClipConservativeBounds,
116 args.fViewMatrix,
117 args.fShape,
118 (GrAA::kYes == args.fDoStencilMSAA) ? GrAAType::kMSAA : GrAAType::kNone,
119 false};
120 this->drawPath(drawArgs);
121}
122