The Tor Browser / file comparison
comparison: gfx/skia/trunk/src/gpu/GrSoftwarePathRenderer.cpp
gfx/skia/trunk/src/gpu/GrSoftwarePathRenderer.cpp
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:4a419308ac4c |
|---|---|
| 1 | |
| 2 /* | |
| 3 * Copyright 2012 Google Inc. | |
| 4 * | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 | |
| 9 #include "GrSoftwarePathRenderer.h" | |
| 10 #include "GrContext.h" | |
| 11 #include "GrSWMaskHelper.h" | |
| 12 | |
| 13 //////////////////////////////////////////////////////////////////////////////// | |
| 14 bool GrSoftwarePathRenderer::canDrawPath(const SkPath&, | |
| 15 const SkStrokeRec&, | |
| 16 const GrDrawTarget*, | |
| 17 bool antiAlias) const { | |
| 18 if (!antiAlias || NULL == fContext) { | |
| 19 // TODO: We could allow the SW path to also handle non-AA paths but | |
| 20 // this would mean that GrDefaultPathRenderer would never be called | |
| 21 // (since it appears after the SW renderer in the path renderer | |
| 22 // chain). Some testing would need to be done r.e. performance | |
| 23 // and consistency of the resulting images before removing | |
| 24 // the "!antiAlias" clause from the above test | |
| 25 return false; | |
| 26 } | |
| 27 | |
| 28 return true; | |
| 29 } | |
| 30 | |
| 31 GrPathRenderer::StencilSupport GrSoftwarePathRenderer::onGetStencilSupport( | |
| 32 const SkPath&, | |
| 33 const SkStrokeRec&, | |
| 34 const GrDrawTarget*) const { | |
| 35 return GrPathRenderer::kNoSupport_StencilSupport; | |
| 36 } | |
| 37 | |
| 38 namespace { | |
| 39 | |
| 40 //////////////////////////////////////////////////////////////////////////////// | |
| 41 // gets device coord bounds of path (not considering the fill) and clip. The | |
| 42 // path bounds will be a subset of the clip bounds. returns false if | |
| 43 // path bounds would be empty. | |
| 44 bool get_path_and_clip_bounds(const GrDrawTarget* target, | |
| 45 const SkPath& path, | |
| 46 const SkMatrix& matrix, | |
| 47 SkIRect* devPathBounds, | |
| 48 SkIRect* devClipBounds) { | |
| 49 // compute bounds as intersection of rt size, clip, and path | |
| 50 const GrRenderTarget* rt = target->getDrawState().getRenderTarget(); | |
| 51 if (NULL == rt) { | |
| 52 return false; | |
| 53 } | |
| 54 *devPathBounds = SkIRect::MakeWH(rt->width(), rt->height()); | |
| 55 | |
| 56 target->getClip()->getConservativeBounds(rt, devClipBounds); | |
| 57 | |
| 58 // TODO: getConservativeBounds already intersects with the | |
| 59 // render target's bounding box. Remove this next line | |
| 60 if (!devPathBounds->intersect(*devClipBounds)) { | |
| 61 return false; | |
| 62 } | |
| 63 | |
| 64 if (!path.getBounds().isEmpty()) { | |
| 65 SkRect pathSBounds; | |
| 66 matrix.mapRect(&pathSBounds, path.getBounds()); | |
| 67 SkIRect pathIBounds; | |
| 68 pathSBounds.roundOut(&pathIBounds); | |
| 69 if (!devPathBounds->intersect(pathIBounds)) { | |
| 70 // set the correct path bounds, as this would be used later. | |
| 71 *devPathBounds = pathIBounds; | |
| 72 return false; | |
| 73 } | |
| 74 } else { | |
| 75 *devPathBounds = SkIRect::EmptyIRect(); | |
| 76 return false; | |
| 77 } | |
| 78 return true; | |
| 79 } | |
| 80 | |
| 81 //////////////////////////////////////////////////////////////////////////////// | |
| 82 void draw_around_inv_path(GrDrawTarget* target, | |
| 83 const SkIRect& devClipBounds, | |
| 84 const SkIRect& devPathBounds) { | |
| 85 GrDrawState::AutoViewMatrixRestore avmr; | |
| 86 if (!avmr.setIdentity(target->drawState())) { | |
| 87 return; | |
| 88 } | |
| 89 SkRect rect; | |
| 90 if (devClipBounds.fTop < devPathBounds.fTop) { | |
| 91 rect.iset(devClipBounds.fLeft, devClipBounds.fTop, | |
| 92 devClipBounds.fRight, devPathBounds.fTop); | |
| 93 target->drawSimpleRect(rect, NULL); | |
| 94 } | |
| 95 if (devClipBounds.fLeft < devPathBounds.fLeft) { | |
| 96 rect.iset(devClipBounds.fLeft, devPathBounds.fTop, | |
| 97 devPathBounds.fLeft, devPathBounds.fBottom); | |
| 98 target->drawSimpleRect(rect, NULL); | |
| 99 } | |
| 100 if (devClipBounds.fRight > devPathBounds.fRight) { | |
| 101 rect.iset(devPathBounds.fRight, devPathBounds.fTop, | |
| 102 devClipBounds.fRight, devPathBounds.fBottom); | |
| 103 target->drawSimpleRect(rect, NULL); | |
| 104 } | |
| 105 if (devClipBounds.fBottom > devPathBounds.fBottom) { | |
| 106 rect.iset(devClipBounds.fLeft, devPathBounds.fBottom, | |
| 107 devClipBounds.fRight, devClipBounds.fBottom); | |
| 108 target->drawSimpleRect(rect, NULL); | |
| 109 } | |
| 110 } | |
| 111 | |
| 112 } | |
| 113 | |
| 114 //////////////////////////////////////////////////////////////////////////////// | |
| 115 // return true on success; false on failure | |
| 116 bool GrSoftwarePathRenderer::onDrawPath(const SkPath& path, | |
| 117 const SkStrokeRec& stroke, | |
| 118 GrDrawTarget* target, | |
| 119 bool antiAlias) { | |
| 120 | |
| 121 if (NULL == fContext) { | |
| 122 return false; | |
| 123 } | |
| 124 | |
| 125 GrDrawState* drawState = target->drawState(); | |
| 126 | |
| 127 SkMatrix vm = drawState->getViewMatrix(); | |
| 128 | |
| 129 SkIRect devPathBounds, devClipBounds; | |
| 130 if (!get_path_and_clip_bounds(target, path, vm, | |
| 131 &devPathBounds, &devClipBounds)) { | |
| 132 if (path.isInverseFillType()) { | |
| 133 draw_around_inv_path(target, devClipBounds, devPathBounds); | |
| 134 } | |
| 135 return true; | |
| 136 } | |
| 137 | |
| 138 SkAutoTUnref<GrTexture> texture( | |
| 139 GrSWMaskHelper::DrawPathMaskToTexture(fContext, path, stroke, | |
| 140 devPathBounds, | |
| 141 antiAlias, &vm)); | |
| 142 if (NULL == texture) { | |
| 143 return false; | |
| 144 } | |
| 145 | |
| 146 GrSWMaskHelper::DrawToTargetWithPathMask(texture, target, devPathBounds); | |
| 147 | |
| 148 if (path.isInverseFillType()) { | |
| 149 draw_around_inv_path(target, devClipBounds, devPathBounds); | |
| 150 } | |
| 151 | |
| 152 return true; | |
| 153 } |
