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1 | 1 |
2 /* | 2 /* |
3 * Copyright 2012 Google Inc. | 3 * Copyright 2012 Google Inc. |
4 * | 4 * |
5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
7 */ | 7 */ |
8 | 8 |
9 | 9 |
10 #include "GrStencilAndCoverPathRenderer.h" | 10 #include "GrStencilAndCoverPathRenderer.h" |
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33 GrStencilAndCoverPathRenderer::~GrStencilAndCoverPathRenderer() { | 33 GrStencilAndCoverPathRenderer::~GrStencilAndCoverPathRenderer() { |
34 fGpu->unref(); | 34 fGpu->unref(); |
35 } | 35 } |
36 | 36 |
37 bool GrStencilAndCoverPathRenderer::canDrawPath(const SkPath& path, | 37 bool GrStencilAndCoverPathRenderer::canDrawPath(const SkPath& path, |
38 const SkStrokeRec& stroke, | 38 const SkStrokeRec& stroke, |
39 const GrDrawTarget* target, | 39 const GrDrawTarget* target, |
40 bool antiAlias) const { | 40 bool antiAlias) const { |
41 return stroke.isFillStyle() && | 41 return stroke.isFillStyle() && |
42 !antiAlias && // doesn't do per-path AA, relies on the target having MSAA | 42 !antiAlias && // doesn't do per-path AA, relies on the target having MSAA |
43 !target->getDrawState().willEffectReadDstColor() && // not supported yet | |
Chris Dalton
2013/09/13 19:49:58
I don't think we need this constraint anymore. Wit
bsalomon
2013/09/13 20:25:28
Really? I think onDrawPath will have to handle thi
Kimmo Kinnunen
2013/09/18 07:52:38
I don't think there's code for this yet.. Left as
| |
43 target->getDrawState().getStencil().isDisabled(); | 44 target->getDrawState().getStencil().isDisabled(); |
44 } | 45 } |
45 | 46 |
46 GrPathRenderer::StencilSupport GrStencilAndCoverPathRenderer::onGetStencilSuppor t( | 47 GrPathRenderer::StencilSupport GrStencilAndCoverPathRenderer::onGetStencilSuppor t( |
47 const SkPath&, | 48 const SkPath&, |
48 const SkStrokeRec& , | 49 const SkStrokeRec& , |
49 const GrDrawTarget*) con st { | 50 const GrDrawTarget*) con st { |
50 return GrPathRenderer::kStencilOnly_StencilSupport; | 51 return GrPathRenderer::kStencilOnly_StencilSupport; |
51 } | 52 } |
52 | 53 |
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63 GrDrawTarget* target, | 64 GrDrawTarget* target, |
64 bool antiAlias) { | 65 bool antiAlias) { |
65 SkASSERT(!antiAlias); | 66 SkASSERT(!antiAlias); |
66 SkASSERT(!stroke.isHairlineStyle()); | 67 SkASSERT(!stroke.isHairlineStyle()); |
67 | 68 |
68 GrDrawState* drawState = target->drawState(); | 69 GrDrawState* drawState = target->drawState(); |
69 SkASSERT(drawState->getStencil().isDisabled()); | 70 SkASSERT(drawState->getStencil().isDisabled()); |
70 | 71 |
71 SkAutoTUnref<GrPath> p(fGpu->createPath(path)); | 72 SkAutoTUnref<GrPath> p(fGpu->createPath(path)); |
72 | 73 |
73 SkPath::FillType nonInvertedFill = SkPath::ConvertToNonInverseFillType(path. getFillType()); | 74 if (!path.isInverseFillType()) { |
74 target->stencilPath(p, stroke, nonInvertedFill); | 75 GR_STATIC_CONST_SAME_STENCIL(kStencilPass, |
76 kZero_StencilOp, | |
77 kZero_StencilOp, | |
78 kNotEqual_StencilFunc, | |
79 0xffff, | |
80 0x0000, | |
81 0xffff); | |
75 | 82 |
76 // TODO: Use built in cover operation rather than a rect draw. This will req uire making our | 83 *drawState->stencil() = kStencilPass; |
77 // fragment shaders be able to eat varyings generated by a matrix. | |
78 | 84 |
79 // fill the path, zero out the stencil | 85 target->drawPath(p, stroke, path.getFillType()); |
80 SkRect bounds = p->getBounds(); | 86 } else { |
81 SkScalar bloat = drawState->getViewMatrix().getMaxStretch() * SK_ScalarHalf; | 87 SkPath::FillType nonInvertedFill = SkPath::ConvertToNonInverseFillType(p ath.getFillType()); |
82 GrDrawState::AutoViewMatrixRestore avmr; | 88 target->stencilPath(p, stroke, nonInvertedFill); |
83 | 89 |
84 if (nonInvertedFill == path.getFillType()) { | 90 GrDrawState::AutoViewMatrixRestore avmr; |
85 GR_STATIC_CONST_SAME_STENCIL(kStencilPass, | 91 |
86 kZero_StencilOp, | |
87 kZero_StencilOp, | |
88 kNotEqual_StencilFunc, | |
89 0xffff, | |
90 0x0000, | |
91 0xffff); | |
92 *drawState->stencil() = kStencilPass; | |
93 } else { | |
94 GR_STATIC_CONST_SAME_STENCIL(kInvertedStencilPass, | 92 GR_STATIC_CONST_SAME_STENCIL(kInvertedStencilPass, |
95 kZero_StencilOp, | 93 kZero_StencilOp, |
96 kZero_StencilOp, | 94 kZero_StencilOp, |
97 // We know our rect will hit pixels outside the clip and the user bi ts will be 0 | 95 // We know our rect will hit pixels outside the clip and the user bi ts will be 0 |
98 // outside the clip. So we can't just fill where the user bits are 0 . We also need to | 96 // outside the clip. So we can't just fill where the user bits are 0 . We also need to |
99 // check that the clip bit is set. | 97 // check that the clip bit is set. |
100 kEqualIfInClip_StencilFunc, | 98 kEqualIfInClip_StencilFunc, |
101 0xffff, | 99 0xffff, |
102 0x0000, | 100 0x0000, |
103 0xffff); | 101 0xffff); |
102 | |
103 | |
104 SkMatrix vmi; | 104 SkMatrix vmi; |
105 bounds.setLTRB(0, 0, | 105 SkRect bounds = SkRect::MakeLTRB(0, 0, |
106 SkIntToScalar(drawState->getRenderTarget()->width()), | 106 SkIntToScalar(drawState->getRenderTarge t()->width()), |
107 SkIntToScalar(drawState->getRenderTarget()->height())); | 107 SkIntToScalar(drawState->getRenderTarge t()->height())); |
108 // mapRect through persp matrix may not be correct | 108 // mapRect through persp matrix may not be correct |
109 if (!drawState->getViewMatrix().hasPerspective() && drawState->getViewIn verse(&vmi)) { | 109 if (!drawState->getViewMatrix().hasPerspective() && drawState->getViewIn verse(&vmi)) { |
110 vmi.mapRect(&bounds); | 110 vmi.mapRect(&bounds); |
111 // theoretically could set bloat = 0, instead leave it because of ma trix inversion | 111 // theoretically could set bloat = 0, instead leave it because of ma trix inversion |
112 // precision. | 112 // precision. |
113 SkScalar bloat = drawState->getViewMatrix().getMaxStretch() * SK_Sca larHalf; | |
114 bounds.outset(bloat, bloat); | |
113 } else { | 115 } else { |
114 avmr.setIdentity(drawState); | 116 avmr.setIdentity(drawState); |
115 bloat = 0; | |
116 } | 117 } |
117 *drawState->stencil() = kInvertedStencilPass; | 118 *drawState->stencil() = kInvertedStencilPass; |
119 target->drawSimpleRect(bounds, NULL); | |
118 } | 120 } |
119 bounds.outset(bloat, bloat); | |
120 target->drawSimpleRect(bounds, NULL); | |
121 target->drawState()->stencil()->setDisabled(); | 121 target->drawState()->stencil()->setDisabled(); |
122 return true; | 122 return true; |
123 } | 123 } |
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