bsalomon@google.com | 69cc6ad | 2012-01-17 14:25:10 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2012 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 "GrAAConvexPathRenderer.h" |
bsalomon | eb1cb5c | 2015-05-22 08:01:09 -0700 | [diff] [blame] | 9 | #include "GrCaps.h" |
Brian Salomon | 5ec9def | 2016-12-20 15:34:05 -0500 | [diff] [blame] | 10 | #include "GrDrawOpTest.h" |
joshualitt | eb2a676 | 2014-12-04 11:35:33 -0800 | [diff] [blame] | 11 | #include "GrGeometryProcessor.h" |
bsalomon@google.com | 69cc6ad | 2012-01-17 14:25:10 +0000 | [diff] [blame] | 12 | #include "GrPathUtils.h" |
Brian Salomon | dad2923 | 2016-12-01 16:40:24 -0500 | [diff] [blame] | 13 | #include "GrProcessor.h" |
Brian Salomon | 653f42f | 2018-07-10 10:07:31 -0400 | [diff] [blame] | 14 | #include "GrRenderTargetContext.h" |
| 15 | #include "GrShape.h" |
Brian Salomon | 10978a6 | 2017-06-15 16:21:49 -0400 | [diff] [blame] | 16 | #include "GrSimpleMeshDrawOpHelper.h" |
Brian Osman | f9aabff | 2018-11-13 16:11:38 -0500 | [diff] [blame] | 17 | #include "GrVertexWriter.h" |
egdaniel | af18a09 | 2015-01-05 10:22:28 -0800 | [diff] [blame] | 18 | #include "SkGeometry.h" |
reed | 026beb5 | 2015-06-10 14:23:15 -0700 | [diff] [blame] | 19 | #include "SkPathPriv.h" |
Cary Clark | df429f3 | 2017-11-08 11:44:31 -0500 | [diff] [blame] | 20 | #include "SkPointPriv.h" |
bsalomon@google.com | 69cc6ad | 2012-01-17 14:25:10 +0000 | [diff] [blame] | 21 | #include "SkString.h" |
Greg Daniel | d5b4593 | 2018-06-07 13:15:10 -0400 | [diff] [blame] | 22 | #include "SkTypes.h" |
egdaniel | 7ea439b | 2015-12-03 09:20:44 -0800 | [diff] [blame] | 23 | #include "glsl/GrGLSLFragmentShaderBuilder.h" |
egdaniel | e659a58 | 2015-11-13 09:55:43 -0800 | [diff] [blame] | 24 | #include "glsl/GrGLSLGeometryProcessor.h" |
egdaniel | 018fb62 | 2015-10-28 07:26:40 -0700 | [diff] [blame] | 25 | #include "glsl/GrGLSLProgramDataManager.h" |
egdaniel | 7ea439b | 2015-12-03 09:20:44 -0800 | [diff] [blame] | 26 | #include "glsl/GrGLSLUniformHandler.h" |
egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 27 | #include "glsl/GrGLSLVarying.h" |
Chris Dalton | c17bf32 | 2017-10-24 10:59:03 -0600 | [diff] [blame] | 28 | #include "glsl/GrGLSLVertexGeoBuilder.h" |
Brian Salomon | 8952743 | 2016-12-16 09:52:16 -0500 | [diff] [blame] | 29 | #include "ops/GrMeshDrawOp.h" |
commit-bot@chromium.org | 234d4fb | 2013-09-30 19:55:49 +0000 | [diff] [blame] | 30 | |
bsalomon@google.com | 69cc6ad | 2012-01-17 14:25:10 +0000 | [diff] [blame] | 31 | GrAAConvexPathRenderer::GrAAConvexPathRenderer() { |
| 32 | } |
| 33 | |
bsalomon@google.com | 69cc6ad | 2012-01-17 14:25:10 +0000 | [diff] [blame] | 34 | struct Segment { |
| 35 | enum { |
bsalomon@google.com | 9b1517e | 2012-03-05 17:58:34 +0000 | [diff] [blame] | 36 | // These enum values are assumed in member functions below. |
| 37 | kLine = 0, |
| 38 | kQuad = 1, |
bsalomon@google.com | 69cc6ad | 2012-01-17 14:25:10 +0000 | [diff] [blame] | 39 | } fType; |
bsalomon@google.com | 9b1517e | 2012-03-05 17:58:34 +0000 | [diff] [blame] | 40 | |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 41 | // line uses one pt, quad uses 2 pts |
commit-bot@chromium.org | 972f9cd | 2014-03-28 17:58:28 +0000 | [diff] [blame] | 42 | SkPoint fPts[2]; |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 43 | // normal to edge ending at each pt |
commit-bot@chromium.org | 972f9cd | 2014-03-28 17:58:28 +0000 | [diff] [blame] | 44 | SkVector fNorms[2]; |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 45 | // is the corner where the previous segment meets this segment |
| 46 | // sharp. If so, fMid is a normalized bisector facing outward. |
commit-bot@chromium.org | 972f9cd | 2014-03-28 17:58:28 +0000 | [diff] [blame] | 47 | SkVector fMid; |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 48 | |
| 49 | int countPoints() { |
bsalomon@google.com | 9b1517e | 2012-03-05 17:58:34 +0000 | [diff] [blame] | 50 | GR_STATIC_ASSERT(0 == kLine && 1 == kQuad); |
| 51 | return fType + 1; |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 52 | } |
| 53 | const SkPoint& endPt() const { |
bsalomon@google.com | 9b1517e | 2012-03-05 17:58:34 +0000 | [diff] [blame] | 54 | GR_STATIC_ASSERT(0 == kLine && 1 == kQuad); |
| 55 | return fPts[fType]; |
Mike Klein | fc6c37b | 2016-09-27 09:34:10 -0400 | [diff] [blame] | 56 | } |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 57 | const SkPoint& endNorm() const { |
bsalomon@google.com | 9b1517e | 2012-03-05 17:58:34 +0000 | [diff] [blame] | 58 | GR_STATIC_ASSERT(0 == kLine && 1 == kQuad); |
| 59 | return fNorms[fType]; |
Mike Klein | fc6c37b | 2016-09-27 09:34:10 -0400 | [diff] [blame] | 60 | } |
bsalomon@google.com | 69cc6ad | 2012-01-17 14:25:10 +0000 | [diff] [blame] | 61 | }; |
| 62 | |
| 63 | typedef SkTArray<Segment, true> SegmentArray; |
| 64 | |
Greg Daniel | 8b09b96 | 2018-04-03 14:53:45 -0400 | [diff] [blame] | 65 | static bool center_of_mass(const SegmentArray& segments, SkPoint* c) { |
bsalomon@google.com | 8171288 | 2012-11-01 17:12:34 +0000 | [diff] [blame] | 66 | SkScalar area = 0; |
vandebo@chromium.org | 6390c72 | 2012-03-28 21:03:22 +0000 | [diff] [blame] | 67 | SkPoint center = {0, 0}; |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 68 | int count = segments.count(); |
vandebo@chromium.org | 6390c72 | 2012-03-28 21:03:22 +0000 | [diff] [blame] | 69 | SkPoint p0 = {0, 0}; |
bsalomon@google.com | 5b56d9e | 2012-02-23 19:18:37 +0000 | [diff] [blame] | 70 | if (count > 2) { |
| 71 | // We translate the polygon so that the first point is at the origin. |
| 72 | // This avoids some precision issues with small area polygons far away |
| 73 | // from the origin. |
| 74 | p0 = segments[0].endPt(); |
| 75 | SkPoint pi; |
| 76 | SkPoint pj; |
bsalomon@google.com | a51ab84 | 2012-07-10 19:53:34 +0000 | [diff] [blame] | 77 | // the first and last iteration of the below loop would compute |
bsalomon@google.com | 5b56d9e | 2012-02-23 19:18:37 +0000 | [diff] [blame] | 78 | // zeros since the starting / ending point is (0,0). So instead we start |
| 79 | // at i=1 and make the last iteration i=count-2. |
| 80 | pj = segments[1].endPt() - p0; |
| 81 | for (int i = 1; i < count - 1; ++i) { |
| 82 | pi = pj; |
robertphillips | 44c3128 | 2015-09-03 12:58:48 -0700 | [diff] [blame] | 83 | pj = segments[i + 1].endPt() - p0; |
bsalomon@google.com | 5b56d9e | 2012-02-23 19:18:37 +0000 | [diff] [blame] | 84 | |
robertphillips | 44c3128 | 2015-09-03 12:58:48 -0700 | [diff] [blame] | 85 | SkScalar t = SkPoint::CrossProduct(pi, pj); |
bsalomon@google.com | 5b56d9e | 2012-02-23 19:18:37 +0000 | [diff] [blame] | 86 | area += t; |
| 87 | center.fX += (pi.fX + pj.fX) * t; |
| 88 | center.fY += (pi.fY + pj.fY) * t; |
bsalomon@google.com | 5b56d9e | 2012-02-23 19:18:37 +0000 | [diff] [blame] | 89 | } |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 90 | } |
robertphillips | 44c3128 | 2015-09-03 12:58:48 -0700 | [diff] [blame] | 91 | |
bsalomon@google.com | 278dc69 | 2012-02-15 16:52:51 +0000 | [diff] [blame] | 92 | // If the poly has no area then we instead return the average of |
| 93 | // its points. |
bsalomon@google.com | 5b56d9e | 2012-02-23 19:18:37 +0000 | [diff] [blame] | 94 | if (SkScalarNearlyZero(area)) { |
bsalomon@google.com | 278dc69 | 2012-02-15 16:52:51 +0000 | [diff] [blame] | 95 | SkPoint avg; |
| 96 | avg.set(0, 0); |
| 97 | for (int i = 0; i < count; ++i) { |
| 98 | const SkPoint& pt = segments[i].endPt(); |
| 99 | avg.fX += pt.fX; |
| 100 | avg.fY += pt.fY; |
| 101 | } |
| 102 | SkScalar denom = SK_Scalar1 / count; |
| 103 | avg.scale(denom); |
| 104 | *c = avg; |
| 105 | } else { |
| 106 | area *= 3; |
reed | 80ea19c | 2015-05-12 10:37:34 -0700 | [diff] [blame] | 107 | area = SkScalarInvert(area); |
robertphillips | 44c3128 | 2015-09-03 12:58:48 -0700 | [diff] [blame] | 108 | center.scale(area); |
bsalomon@google.com | 5b56d9e | 2012-02-23 19:18:37 +0000 | [diff] [blame] | 109 | // undo the translate of p0 to the origin. |
| 110 | *c = center + p0; |
bsalomon@google.com | 278dc69 | 2012-02-15 16:52:51 +0000 | [diff] [blame] | 111 | } |
Greg Daniel | 62473ad | 2018-04-03 15:44:18 -0400 | [diff] [blame] | 112 | return !SkScalarIsNaN(c->fX) && !SkScalarIsNaN(c->fY) && c->isFinite(); |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 113 | } |
| 114 | |
Greg Daniel | 8b09b96 | 2018-04-03 14:53:45 -0400 | [diff] [blame] | 115 | static bool compute_vectors(SegmentArray* segments, |
commit-bot@chromium.org | fdfbb9d | 2013-08-15 18:16:27 +0000 | [diff] [blame] | 116 | SkPoint* fanPt, |
reed | 026beb5 | 2015-06-10 14:23:15 -0700 | [diff] [blame] | 117 | SkPathPriv::FirstDirection dir, |
commit-bot@chromium.org | fdfbb9d | 2013-08-15 18:16:27 +0000 | [diff] [blame] | 118 | int* vCount, |
| 119 | int* iCount) { |
Greg Daniel | 8b09b96 | 2018-04-03 14:53:45 -0400 | [diff] [blame] | 120 | if (!center_of_mass(*segments, fanPt)) { |
| 121 | return false; |
| 122 | } |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 123 | int count = segments->count(); |
| 124 | |
bsalomon@google.com | 278dc69 | 2012-02-15 16:52:51 +0000 | [diff] [blame] | 125 | // Make the normals point towards the outside |
Cary Clark | df429f3 | 2017-11-08 11:44:31 -0500 | [diff] [blame] | 126 | SkPointPriv::Side normSide; |
reed | 026beb5 | 2015-06-10 14:23:15 -0700 | [diff] [blame] | 127 | if (dir == SkPathPriv::kCCW_FirstDirection) { |
Cary Clark | df429f3 | 2017-11-08 11:44:31 -0500 | [diff] [blame] | 128 | normSide = SkPointPriv::kRight_Side; |
bsalomon@google.com | 278dc69 | 2012-02-15 16:52:51 +0000 | [diff] [blame] | 129 | } else { |
Cary Clark | df429f3 | 2017-11-08 11:44:31 -0500 | [diff] [blame] | 130 | normSide = SkPointPriv::kLeft_Side; |
bsalomon@google.com | 278dc69 | 2012-02-15 16:52:51 +0000 | [diff] [blame] | 131 | } |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 132 | |
Greg Daniel | d5b4593 | 2018-06-07 13:15:10 -0400 | [diff] [blame] | 133 | int64_t vCount64 = 0; |
| 134 | int64_t iCount64 = 0; |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 135 | // compute normals at all points |
| 136 | for (int a = 0; a < count; ++a) { |
bsalomon@google.com | 7d9ffc8 | 2013-05-14 14:20:28 +0000 | [diff] [blame] | 137 | Segment& sega = (*segments)[a]; |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 138 | int b = (a + 1) % count; |
| 139 | Segment& segb = (*segments)[b]; |
| 140 | |
commit-bot@chromium.org | 972f9cd | 2014-03-28 17:58:28 +0000 | [diff] [blame] | 141 | const SkPoint* prevPt = &sega.endPt(); |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 142 | int n = segb.countPoints(); |
| 143 | for (int p = 0; p < n; ++p) { |
| 144 | segb.fNorms[p] = segb.fPts[p] - *prevPt; |
| 145 | segb.fNorms[p].normalize(); |
Brian Salomon | 0235c64 | 2018-08-31 12:04:18 -0400 | [diff] [blame] | 146 | segb.fNorms[p] = SkPointPriv::MakeOrthog(segb.fNorms[p], normSide); |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 147 | prevPt = &segb.fPts[p]; |
| 148 | } |
| 149 | if (Segment::kLine == segb.fType) { |
Greg Daniel | d5b4593 | 2018-06-07 13:15:10 -0400 | [diff] [blame] | 150 | vCount64 += 5; |
| 151 | iCount64 += 9; |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 152 | } else { |
Greg Daniel | d5b4593 | 2018-06-07 13:15:10 -0400 | [diff] [blame] | 153 | vCount64 += 6; |
| 154 | iCount64 += 12; |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 155 | } |
| 156 | } |
| 157 | |
| 158 | // compute mid-vectors where segments meet. TODO: Detect shallow corners |
| 159 | // and leave out the wedges and close gaps by stitching segments together. |
| 160 | for (int a = 0; a < count; ++a) { |
| 161 | const Segment& sega = (*segments)[a]; |
| 162 | int b = (a + 1) % count; |
| 163 | Segment& segb = (*segments)[b]; |
| 164 | segb.fMid = segb.fNorms[0] + sega.endNorm(); |
| 165 | segb.fMid.normalize(); |
| 166 | // corner wedges |
Greg Daniel | d5b4593 | 2018-06-07 13:15:10 -0400 | [diff] [blame] | 167 | vCount64 += 4; |
| 168 | iCount64 += 6; |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 169 | } |
Greg Daniel | d5b4593 | 2018-06-07 13:15:10 -0400 | [diff] [blame] | 170 | if (vCount64 > SK_MaxS32 || iCount64 > SK_MaxS32) { |
| 171 | return false; |
| 172 | } |
| 173 | *vCount = vCount64; |
| 174 | *iCount = iCount64; |
Greg Daniel | 8b09b96 | 2018-04-03 14:53:45 -0400 | [diff] [blame] | 175 | return true; |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 176 | } |
| 177 | |
bsalomon@google.com | 9732f62 | 2012-01-31 15:19:21 +0000 | [diff] [blame] | 178 | struct DegenerateTestData { |
| 179 | DegenerateTestData() { fStage = kInitial; } |
| 180 | bool isDegenerate() const { return kNonDegenerate != fStage; } |
| 181 | enum { |
| 182 | kInitial, |
| 183 | kPoint, |
| 184 | kLine, |
| 185 | kNonDegenerate |
| 186 | } fStage; |
commit-bot@chromium.org | 972f9cd | 2014-03-28 17:58:28 +0000 | [diff] [blame] | 187 | SkPoint fFirstPoint; |
| 188 | SkVector fLineNormal; |
bsalomon@google.com | 8171288 | 2012-11-01 17:12:34 +0000 | [diff] [blame] | 189 | SkScalar fLineC; |
bsalomon@google.com | 9732f62 | 2012-01-31 15:19:21 +0000 | [diff] [blame] | 190 | }; |
| 191 | |
commit-bot@chromium.org | fdfbb9d | 2013-08-15 18:16:27 +0000 | [diff] [blame] | 192 | static const SkScalar kClose = (SK_Scalar1 / 16); |
Mike Reed | 8be952a | 2017-02-13 20:44:33 -0500 | [diff] [blame] | 193 | static const SkScalar kCloseSqd = kClose * kClose; |
bsalomon@google.com | 9732f62 | 2012-01-31 15:19:21 +0000 | [diff] [blame] | 194 | |
commit-bot@chromium.org | 972f9cd | 2014-03-28 17:58:28 +0000 | [diff] [blame] | 195 | static void update_degenerate_test(DegenerateTestData* data, const SkPoint& pt) { |
bsalomon@google.com | 9732f62 | 2012-01-31 15:19:21 +0000 | [diff] [blame] | 196 | switch (data->fStage) { |
| 197 | case DegenerateTestData::kInitial: |
| 198 | data->fFirstPoint = pt; |
| 199 | data->fStage = DegenerateTestData::kPoint; |
| 200 | break; |
| 201 | case DegenerateTestData::kPoint: |
Cary Clark | df429f3 | 2017-11-08 11:44:31 -0500 | [diff] [blame] | 202 | if (SkPointPriv::DistanceToSqd(pt, data->fFirstPoint) > kCloseSqd) { |
bsalomon@google.com | 9732f62 | 2012-01-31 15:19:21 +0000 | [diff] [blame] | 203 | data->fLineNormal = pt - data->fFirstPoint; |
| 204 | data->fLineNormal.normalize(); |
Brian Salomon | 0235c64 | 2018-08-31 12:04:18 -0400 | [diff] [blame] | 205 | data->fLineNormal = SkPointPriv::MakeOrthog(data->fLineNormal); |
bsalomon@google.com | 9732f62 | 2012-01-31 15:19:21 +0000 | [diff] [blame] | 206 | data->fLineC = -data->fLineNormal.dot(data->fFirstPoint); |
| 207 | data->fStage = DegenerateTestData::kLine; |
| 208 | } |
| 209 | break; |
| 210 | case DegenerateTestData::kLine: |
commit-bot@chromium.org | fdfbb9d | 2013-08-15 18:16:27 +0000 | [diff] [blame] | 211 | if (SkScalarAbs(data->fLineNormal.dot(pt) + data->fLineC) > kClose) { |
bsalomon@google.com | 9732f62 | 2012-01-31 15:19:21 +0000 | [diff] [blame] | 212 | data->fStage = DegenerateTestData::kNonDegenerate; |
| 213 | } |
| 214 | case DegenerateTestData::kNonDegenerate: |
| 215 | break; |
| 216 | default: |
Ben Wagner | b4aab9a | 2017-08-16 10:53:04 -0400 | [diff] [blame] | 217 | SK_ABORT("Unexpected degenerate test stage."); |
bsalomon@google.com | 9732f62 | 2012-01-31 15:19:21 +0000 | [diff] [blame] | 218 | } |
| 219 | } |
| 220 | |
reed | 026beb5 | 2015-06-10 14:23:15 -0700 | [diff] [blame] | 221 | static inline bool get_direction(const SkPath& path, const SkMatrix& m, |
| 222 | SkPathPriv::FirstDirection* dir) { |
| 223 | if (!SkPathPriv::CheapComputeFirstDirection(path, dir)) { |
bsalomon@google.com | a51ab84 | 2012-07-10 19:53:34 +0000 | [diff] [blame] | 224 | return false; |
| 225 | } |
bsalomon@google.com | af90f7f | 2012-03-05 20:50:10 +0000 | [diff] [blame] | 226 | // check whether m reverses the orientation |
tfarina@chromium.org | f6de475 | 2013-08-17 00:02:59 +0000 | [diff] [blame] | 227 | SkASSERT(!m.hasPerspective()); |
Mike Reed | 8be952a | 2017-02-13 20:44:33 -0500 | [diff] [blame] | 228 | SkScalar det2x2 = m.get(SkMatrix::kMScaleX) * m.get(SkMatrix::kMScaleY) - |
| 229 | m.get(SkMatrix::kMSkewX) * m.get(SkMatrix::kMSkewY); |
bsalomon@google.com | af90f7f | 2012-03-05 20:50:10 +0000 | [diff] [blame] | 230 | if (det2x2 < 0) { |
reed | 026beb5 | 2015-06-10 14:23:15 -0700 | [diff] [blame] | 231 | *dir = SkPathPriv::OppositeFirstDirection(*dir); |
bsalomon@google.com | af90f7f | 2012-03-05 20:50:10 +0000 | [diff] [blame] | 232 | } |
bsalomon@google.com | a51ab84 | 2012-07-10 19:53:34 +0000 | [diff] [blame] | 233 | return true; |
bsalomon@google.com | af90f7f | 2012-03-05 20:50:10 +0000 | [diff] [blame] | 234 | } |
| 235 | |
commit-bot@chromium.org | 106655e | 2013-09-03 21:28:55 +0000 | [diff] [blame] | 236 | static inline void add_line_to_segment(const SkPoint& pt, |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 237 | SegmentArray* segments) { |
commit-bot@chromium.org | fdfbb9d | 2013-08-15 18:16:27 +0000 | [diff] [blame] | 238 | segments->push_back(); |
| 239 | segments->back().fType = Segment::kLine; |
| 240 | segments->back().fPts[0] = pt; |
| 241 | } |
| 242 | |
commit-bot@chromium.org | 106655e | 2013-09-03 21:28:55 +0000 | [diff] [blame] | 243 | static inline void add_quad_segment(const SkPoint pts[3], |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 244 | SegmentArray* segments) { |
Cary Clark | df429f3 | 2017-11-08 11:44:31 -0500 | [diff] [blame] | 245 | if (SkPointPriv::DistanceToSqd(pts[0], pts[1]) < kCloseSqd || |
| 246 | SkPointPriv::DistanceToSqd(pts[1], pts[2]) < kCloseSqd) { |
commit-bot@chromium.org | fdfbb9d | 2013-08-15 18:16:27 +0000 | [diff] [blame] | 247 | if (pts[0] != pts[2]) { |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 248 | add_line_to_segment(pts[2], segments); |
commit-bot@chromium.org | fdfbb9d | 2013-08-15 18:16:27 +0000 | [diff] [blame] | 249 | } |
| 250 | } else { |
| 251 | segments->push_back(); |
| 252 | segments->back().fType = Segment::kQuad; |
| 253 | segments->back().fPts[0] = pts[1]; |
| 254 | segments->back().fPts[1] = pts[2]; |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | static inline void add_cubic_segments(const SkPoint pts[4], |
reed | 026beb5 | 2015-06-10 14:23:15 -0700 | [diff] [blame] | 259 | SkPathPriv::FirstDirection dir, |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 260 | SegmentArray* segments) { |
commit-bot@chromium.org | fdfbb9d | 2013-08-15 18:16:27 +0000 | [diff] [blame] | 261 | SkSTArray<15, SkPoint, true> quads; |
bsalomon | 18fab30 | 2016-02-16 08:00:05 -0800 | [diff] [blame] | 262 | GrPathUtils::convertCubicToQuadsConstrainToTangents(pts, SK_Scalar1, dir, &quads); |
commit-bot@chromium.org | fdfbb9d | 2013-08-15 18:16:27 +0000 | [diff] [blame] | 263 | int count = quads.count(); |
| 264 | for (int q = 0; q < count; q += 3) { |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 265 | add_quad_segment(&quads[q], segments); |
commit-bot@chromium.org | fdfbb9d | 2013-08-15 18:16:27 +0000 | [diff] [blame] | 266 | } |
| 267 | } |
| 268 | |
| 269 | static bool get_segments(const SkPath& path, |
| 270 | const SkMatrix& m, |
| 271 | SegmentArray* segments, |
| 272 | SkPoint* fanPt, |
| 273 | int* vCount, |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 274 | int* iCount) { |
bsalomon@google.com | 69cc6ad | 2012-01-17 14:25:10 +0000 | [diff] [blame] | 275 | SkPath::Iter iter(path, true); |
bsalomon@google.com | 30c174b | 2012-11-13 14:36:42 +0000 | [diff] [blame] | 276 | // This renderer over-emphasizes very thin path regions. We use the distance |
bsalomon@google.com | 5cc90d1 | 2012-01-17 16:28:34 +0000 | [diff] [blame] | 277 | // to the path from the sample to compute coverage. Every pixel intersected |
| 278 | // by the path will be hit and the maximum distance is sqrt(2)/2. We don't |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 279 | // notice that the sample may be close to a very thin area of the path and |
bsalomon@google.com | 5cc90d1 | 2012-01-17 16:28:34 +0000 | [diff] [blame] | 280 | // thus should be very light. This is particularly egregious for degenerate |
| 281 | // line paths. We detect paths that are very close to a line (zero area) and |
| 282 | // draw nothing. |
bsalomon@google.com | 9732f62 | 2012-01-31 15:19:21 +0000 | [diff] [blame] | 283 | DegenerateTestData degenerateData; |
reed | 026beb5 | 2015-06-10 14:23:15 -0700 | [diff] [blame] | 284 | SkPathPriv::FirstDirection dir; |
bsalomon@google.com | a51ab84 | 2012-07-10 19:53:34 +0000 | [diff] [blame] | 285 | // get_direction can fail for some degenerate paths. |
| 286 | if (!get_direction(path, m, &dir)) { |
| 287 | return false; |
| 288 | } |
bsalomon@google.com | 9732f62 | 2012-01-31 15:19:21 +0000 | [diff] [blame] | 289 | |
bsalomon@google.com | 69cc6ad | 2012-01-17 14:25:10 +0000 | [diff] [blame] | 290 | for (;;) { |
commit-bot@chromium.org | 972f9cd | 2014-03-28 17:58:28 +0000 | [diff] [blame] | 291 | SkPoint pts[4]; |
Brian Salomon | 97042bf | 2017-02-28 11:21:28 -0500 | [diff] [blame] | 292 | SkPath::Verb verb = iter.next(pts, true, true); |
bsalomon@google.com | 94b284d | 2013-05-10 17:14:06 +0000 | [diff] [blame] | 293 | switch (verb) { |
| 294 | case SkPath::kMove_Verb: |
bsalomon@google.com | 1a38d55 | 2012-03-15 14:40:46 +0000 | [diff] [blame] | 295 | m.mapPoints(pts, 1); |
bsalomon@google.com | 9732f62 | 2012-01-31 15:19:21 +0000 | [diff] [blame] | 296 | update_degenerate_test(°enerateData, pts[0]); |
| 297 | break; |
bsalomon@google.com | 94b284d | 2013-05-10 17:14:06 +0000 | [diff] [blame] | 298 | case SkPath::kLine_Verb: { |
commit-bot@chromium.org | fdfbb9d | 2013-08-15 18:16:27 +0000 | [diff] [blame] | 299 | m.mapPoints(&pts[1], 1); |
bsalomon@google.com | 1a38d55 | 2012-03-15 14:40:46 +0000 | [diff] [blame] | 300 | update_degenerate_test(°enerateData, pts[1]); |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 301 | add_line_to_segment(pts[1], segments); |
bsalomon@google.com | 69cc6ad | 2012-01-17 14:25:10 +0000 | [diff] [blame] | 302 | break; |
| 303 | } |
bsalomon@google.com | 94b284d | 2013-05-10 17:14:06 +0000 | [diff] [blame] | 304 | case SkPath::kQuad_Verb: |
commit-bot@chromium.org | fdfbb9d | 2013-08-15 18:16:27 +0000 | [diff] [blame] | 305 | m.mapPoints(pts, 3); |
bsalomon@google.com | 9732f62 | 2012-01-31 15:19:21 +0000 | [diff] [blame] | 306 | update_degenerate_test(°enerateData, pts[1]); |
| 307 | update_degenerate_test(°enerateData, pts[2]); |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 308 | add_quad_segment(pts, segments); |
bsalomon@google.com | 69cc6ad | 2012-01-17 14:25:10 +0000 | [diff] [blame] | 309 | break; |
egdaniel | af18a09 | 2015-01-05 10:22:28 -0800 | [diff] [blame] | 310 | case SkPath::kConic_Verb: { |
| 311 | m.mapPoints(pts, 3); |
| 312 | SkScalar weight = iter.conicWeight(); |
| 313 | SkAutoConicToQuads converter; |
Brian Osman | e3deee1 | 2018-11-20 11:10:15 -0500 | [diff] [blame] | 314 | const SkPoint* quadPts = converter.computeQuads(pts, weight, 0.25f); |
egdaniel | af18a09 | 2015-01-05 10:22:28 -0800 | [diff] [blame] | 315 | for (int i = 0; i < converter.countQuads(); ++i) { |
| 316 | update_degenerate_test(°enerateData, quadPts[2*i + 1]); |
| 317 | update_degenerate_test(°enerateData, quadPts[2*i + 2]); |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 318 | add_quad_segment(quadPts + 2*i, segments); |
egdaniel | af18a09 | 2015-01-05 10:22:28 -0800 | [diff] [blame] | 319 | } |
| 320 | break; |
| 321 | } |
bsalomon@google.com | 94b284d | 2013-05-10 17:14:06 +0000 | [diff] [blame] | 322 | case SkPath::kCubic_Verb: { |
bsalomon@google.com | 1a38d55 | 2012-03-15 14:40:46 +0000 | [diff] [blame] | 323 | m.mapPoints(pts, 4); |
bsalomon@google.com | 9732f62 | 2012-01-31 15:19:21 +0000 | [diff] [blame] | 324 | update_degenerate_test(°enerateData, pts[1]); |
| 325 | update_degenerate_test(°enerateData, pts[2]); |
| 326 | update_degenerate_test(°enerateData, pts[3]); |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 327 | add_cubic_segments(pts, dir, segments); |
bsalomon@google.com | 69cc6ad | 2012-01-17 14:25:10 +0000 | [diff] [blame] | 328 | break; |
Brian Salomon | 2335644 | 2018-11-30 15:33:19 -0500 | [diff] [blame] | 329 | } |
bsalomon@google.com | 94b284d | 2013-05-10 17:14:06 +0000 | [diff] [blame] | 330 | case SkPath::kDone_Verb: |
bsalomon@google.com | 9732f62 | 2012-01-31 15:19:21 +0000 | [diff] [blame] | 331 | if (degenerateData.isDegenerate()) { |
| 332 | return false; |
| 333 | } else { |
Greg Daniel | 8b09b96 | 2018-04-03 14:53:45 -0400 | [diff] [blame] | 334 | return compute_vectors(segments, fanPt, dir, vCount, iCount); |
bsalomon@google.com | 9732f62 | 2012-01-31 15:19:21 +0000 | [diff] [blame] | 335 | } |
bsalomon@google.com | 69cc6ad | 2012-01-17 14:25:10 +0000 | [diff] [blame] | 336 | default: |
| 337 | break; |
| 338 | } |
| 339 | } |
| 340 | } |
| 341 | |
bsalomon@google.com | 7d9ffc8 | 2013-05-14 14:20:28 +0000 | [diff] [blame] | 342 | struct Draw { |
| 343 | Draw() : fVertexCnt(0), fIndexCnt(0) {} |
| 344 | int fVertexCnt; |
| 345 | int fIndexCnt; |
| 346 | }; |
| 347 | |
| 348 | typedef SkTArray<Draw, true> DrawArray; |
| 349 | |
Brian Salomon | 60fb0b2 | 2017-06-15 17:09:36 -0400 | [diff] [blame] | 350 | static void create_vertices(const SegmentArray& segments, |
commit-bot@chromium.org | fdfbb9d | 2013-08-15 18:16:27 +0000 | [diff] [blame] | 351 | const SkPoint& fanPt, |
Brian Osman | 7f4735b | 2019-01-02 13:55:10 +0000 | [diff] [blame] | 352 | const GrVertexColor& color, |
Brian Salomon | 60fb0b2 | 2017-06-15 17:09:36 -0400 | [diff] [blame] | 353 | DrawArray* draws, |
Brian Osman | d2fa2eb | 2018-12-26 16:48:40 -0500 | [diff] [blame] | 354 | GrVertexWriter& verts, |
| 355 | uint16_t* idxs, |
| 356 | size_t vertexStride) { |
bsalomon@google.com | 7d9ffc8 | 2013-05-14 14:20:28 +0000 | [diff] [blame] | 357 | Draw* draw = &draws->push_back(); |
| 358 | // alias just to make vert/index assignments easier to read. |
| 359 | int* v = &draw->fVertexCnt; |
| 360 | int* i = &draw->fIndexCnt; |
Brian Osman | 7f4735b | 2019-01-02 13:55:10 +0000 | [diff] [blame] | 361 | const size_t uvOffset = sizeof(SkPoint) + color.size(); |
bsalomon@google.com | 69cc6ad | 2012-01-17 14:25:10 +0000 | [diff] [blame] | 362 | |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 363 | int count = segments.count(); |
| 364 | for (int a = 0; a < count; ++a) { |
| 365 | const Segment& sega = segments[a]; |
| 366 | int b = (a + 1) % count; |
| 367 | const Segment& segb = segments[b]; |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 368 | |
bsalomon@google.com | 7d9ffc8 | 2013-05-14 14:20:28 +0000 | [diff] [blame] | 369 | // Check whether adding the verts for this segment to the current draw would cause index |
| 370 | // values to overflow. |
| 371 | int vCount = 4; |
| 372 | if (Segment::kLine == segb.fType) { |
| 373 | vCount += 5; |
| 374 | } else { |
| 375 | vCount += 6; |
| 376 | } |
| 377 | if (draw->fVertexCnt + vCount > (1 << 16)) { |
bsalomon@google.com | 7d9ffc8 | 2013-05-14 14:20:28 +0000 | [diff] [blame] | 378 | idxs += *i; |
| 379 | draw = &draws->push_back(); |
| 380 | v = &draw->fVertexCnt; |
| 381 | i = &draw->fIndexCnt; |
| 382 | } |
| 383 | |
Brian Osman | d2fa2eb | 2018-12-26 16:48:40 -0500 | [diff] [blame] | 384 | const SkScalar negOneDists[2] = { -SK_Scalar1, -SK_Scalar1 }; |
| 385 | |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 386 | // FIXME: These tris are inset in the 1 unit arc around the corner |
Brian Osman | d2fa2eb | 2018-12-26 16:48:40 -0500 | [diff] [blame] | 387 | SkPoint p0 = sega.endPt(); |
| 388 | // Position, Color, UV, D0, D1 |
| 389 | verts.write(p0, color, SkPoint{0, 0}, negOneDists); |
| 390 | verts.write(p0 + sega.endNorm(), color, SkPoint{0, -SK_Scalar1}, negOneDists); |
| 391 | verts.write(p0 + segb.fMid, color, SkPoint{0, -SK_Scalar1}, negOneDists); |
| 392 | verts.write(p0 + segb.fNorms[0], color, SkPoint{0, -SK_Scalar1}, negOneDists); |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 393 | |
bsalomon@google.com | 7d9ffc8 | 2013-05-14 14:20:28 +0000 | [diff] [blame] | 394 | idxs[*i + 0] = *v + 0; |
| 395 | idxs[*i + 1] = *v + 2; |
| 396 | idxs[*i + 2] = *v + 1; |
| 397 | idxs[*i + 3] = *v + 0; |
| 398 | idxs[*i + 4] = *v + 3; |
| 399 | idxs[*i + 5] = *v + 2; |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 400 | |
bsalomon@google.com | 7d9ffc8 | 2013-05-14 14:20:28 +0000 | [diff] [blame] | 401 | *v += 4; |
| 402 | *i += 6; |
bsalomon@google.com | 69cc6ad | 2012-01-17 14:25:10 +0000 | [diff] [blame] | 403 | |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 404 | if (Segment::kLine == segb.fType) { |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 405 | // we draw the line edge as a degenerate quad (u is 0, v is the |
| 406 | // signed distance to the edge) |
Brian Osman | d2fa2eb | 2018-12-26 16:48:40 -0500 | [diff] [blame] | 407 | SkPoint v1Pos = sega.endPt(); |
| 408 | SkPoint v2Pos = segb.fPts[0]; |
| 409 | SkScalar dist = SkPointPriv::DistanceToLineBetween(fanPt, v1Pos, v2Pos); |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 410 | |
Brian Osman | d2fa2eb | 2018-12-26 16:48:40 -0500 | [diff] [blame] | 411 | verts.write(fanPt, color, SkPoint{0, dist}, negOneDists); |
| 412 | verts.write(v1Pos, color, SkPoint{0, 0}, negOneDists); |
| 413 | verts.write(v2Pos, color, SkPoint{0, 0}, negOneDists); |
| 414 | verts.write(v1Pos + segb.fNorms[0], color, SkPoint{0, -SK_Scalar1}, negOneDists); |
| 415 | verts.write(v2Pos + segb.fNorms[0], color, SkPoint{0, -SK_Scalar1}, negOneDists); |
bsalomon@google.com | 69cc6ad | 2012-01-17 14:25:10 +0000 | [diff] [blame] | 416 | |
cdalton | 3596482 | 2015-04-29 10:14:03 -0700 | [diff] [blame] | 417 | idxs[*i + 0] = *v + 3; |
| 418 | idxs[*i + 1] = *v + 1; |
| 419 | idxs[*i + 2] = *v + 2; |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 420 | |
cdalton | 3596482 | 2015-04-29 10:14:03 -0700 | [diff] [blame] | 421 | idxs[*i + 3] = *v + 4; |
| 422 | idxs[*i + 4] = *v + 3; |
bsalomon@google.com | 7d9ffc8 | 2013-05-14 14:20:28 +0000 | [diff] [blame] | 423 | idxs[*i + 5] = *v + 2; |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 424 | |
cdalton | 3596482 | 2015-04-29 10:14:03 -0700 | [diff] [blame] | 425 | *i += 6; |
| 426 | |
| 427 | // Draw the interior fan if it exists. |
| 428 | // TODO: Detect and combine colinear segments. This will ensure we catch every case |
| 429 | // with no interior, and that the resulting shared edge uses the same endpoints. |
| 430 | if (count >= 3) { |
| 431 | idxs[*i + 0] = *v + 0; |
| 432 | idxs[*i + 1] = *v + 2; |
| 433 | idxs[*i + 2] = *v + 1; |
| 434 | |
| 435 | *i += 3; |
| 436 | } |
bsalomon@google.com | 69cc6ad | 2012-01-17 14:25:10 +0000 | [diff] [blame] | 437 | |
bsalomon@google.com | 7d9ffc8 | 2013-05-14 14:20:28 +0000 | [diff] [blame] | 438 | *v += 5; |
bsalomon@google.com | 0680961 | 2012-01-21 15:03:39 +0000 | [diff] [blame] | 439 | } else { |
Brian Osman | d2fa2eb | 2018-12-26 16:48:40 -0500 | [diff] [blame] | 440 | void* quadVertsBegin = verts.fPtr; |
| 441 | |
commit-bot@chromium.org | 972f9cd | 2014-03-28 17:58:28 +0000 | [diff] [blame] | 442 | SkPoint qpts[] = {sega.endPt(), segb.fPts[0], segb.fPts[1]}; |
bsalomon@google.com | 495e210 | 2012-01-21 14:48:36 +0000 | [diff] [blame] | 443 | |
Brian Osman | d2fa2eb | 2018-12-26 16:48:40 -0500 | [diff] [blame] | 444 | SkScalar c0 = segb.fNorms[0].dot(qpts[0]); |
| 445 | SkScalar c1 = segb.fNorms[1].dot(qpts[2]); |
| 446 | GrVertexWriter::Skip<SkPoint> skipUVs; |
| 447 | |
| 448 | verts.write(fanPt, |
| 449 | color, skipUVs, |
| 450 | -segb.fNorms[0].dot(fanPt) + c0, |
| 451 | -segb.fNorms[1].dot(fanPt) + c1); |
| 452 | |
| 453 | verts.write(qpts[0], |
| 454 | color, skipUVs, |
| 455 | 0.0f, |
| 456 | -segb.fNorms[1].dot(qpts[0]) + c1); |
| 457 | |
| 458 | verts.write(qpts[2], |
| 459 | color, skipUVs, |
| 460 | -segb.fNorms[0].dot(qpts[2]) + c0, |
| 461 | 0.0f); |
| 462 | |
| 463 | verts.write(qpts[0] + segb.fNorms[0], |
| 464 | color, skipUVs, |
| 465 | -SK_ScalarMax/100, |
| 466 | -SK_ScalarMax/100); |
| 467 | |
| 468 | verts.write(qpts[2] + segb.fNorms[1], |
| 469 | color, skipUVs, |
| 470 | -SK_ScalarMax/100, |
| 471 | -SK_ScalarMax/100); |
| 472 | |
commit-bot@chromium.org | 972f9cd | 2014-03-28 17:58:28 +0000 | [diff] [blame] | 473 | SkVector midVec = segb.fNorms[0] + segb.fNorms[1]; |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 474 | midVec.normalize(); |
bsalomon@google.com | 0680961 | 2012-01-21 15:03:39 +0000 | [diff] [blame] | 475 | |
Brian Osman | d2fa2eb | 2018-12-26 16:48:40 -0500 | [diff] [blame] | 476 | verts.write(qpts[1] + midVec, |
| 477 | color, skipUVs, |
| 478 | -SK_ScalarMax/100, |
| 479 | -SK_ScalarMax/100); |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 480 | |
bsalomon@google.com | 1971317 | 2012-03-15 13:51:08 +0000 | [diff] [blame] | 481 | GrPathUtils::QuadUVMatrix toUV(qpts); |
Brian Osman | 7f4735b | 2019-01-02 13:55:10 +0000 | [diff] [blame] | 482 | toUV.apply(quadVertsBegin, 6, vertexStride, uvOffset); |
bsalomon@google.com | 0680961 | 2012-01-21 15:03:39 +0000 | [diff] [blame] | 483 | |
bsalomon@google.com | 7d9ffc8 | 2013-05-14 14:20:28 +0000 | [diff] [blame] | 484 | idxs[*i + 0] = *v + 3; |
| 485 | idxs[*i + 1] = *v + 1; |
| 486 | idxs[*i + 2] = *v + 2; |
| 487 | idxs[*i + 3] = *v + 4; |
| 488 | idxs[*i + 4] = *v + 3; |
| 489 | idxs[*i + 5] = *v + 2; |
bsalomon@google.com | 0680961 | 2012-01-21 15:03:39 +0000 | [diff] [blame] | 490 | |
bsalomon@google.com | 7d9ffc8 | 2013-05-14 14:20:28 +0000 | [diff] [blame] | 491 | idxs[*i + 6] = *v + 5; |
| 492 | idxs[*i + 7] = *v + 3; |
| 493 | idxs[*i + 8] = *v + 4; |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 494 | |
cdalton | 3596482 | 2015-04-29 10:14:03 -0700 | [diff] [blame] | 495 | *i += 9; |
| 496 | |
| 497 | // Draw the interior fan if it exists. |
| 498 | // TODO: Detect and combine colinear segments. This will ensure we catch every case |
| 499 | // with no interior, and that the resulting shared edge uses the same endpoints. |
| 500 | if (count >= 3) { |
| 501 | idxs[*i + 0] = *v + 0; |
| 502 | idxs[*i + 1] = *v + 2; |
| 503 | idxs[*i + 2] = *v + 1; |
| 504 | |
| 505 | *i += 3; |
| 506 | } |
bsalomon@google.com | 9aed114 | 2012-01-30 14:28:39 +0000 | [diff] [blame] | 507 | |
bsalomon@google.com | 7d9ffc8 | 2013-05-14 14:20:28 +0000 | [diff] [blame] | 508 | *v += 6; |
bsalomon@google.com | 69cc6ad | 2012-01-17 14:25:10 +0000 | [diff] [blame] | 509 | } |
| 510 | } |
| 511 | } |
| 512 | |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 513 | /////////////////////////////////////////////////////////////////////////////// |
| 514 | |
| 515 | /* |
| 516 | * Quadratic specified by 0=u^2-v canonical coords. u and v are the first |
| 517 | * two components of the vertex attribute. Coverage is based on signed |
| 518 | * distance with negative being inside, positive outside. The edge is specified in |
| 519 | * window space (y-down). If either the third or fourth component of the interpolated |
| 520 | * vertex coord is > 0 then the pixel is considered outside the edge. This is used to |
skia.committer@gmail.com | 041e2db | 2013-04-03 07:01:14 +0000 | [diff] [blame] | 521 | * attempt to trim to a portion of the infinite quad. |
| 522 | * Requires shader derivative instruction support. |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 523 | */ |
| 524 | |
joshualitt | 249af15 | 2014-09-15 11:41:13 -0700 | [diff] [blame] | 525 | class QuadEdgeEffect : public GrGeometryProcessor { |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 526 | public: |
Brian Osman | 7f4735b | 2019-01-02 13:55:10 +0000 | [diff] [blame] | 527 | static sk_sp<GrGeometryProcessor> Make(const SkMatrix& localMatrix, bool usesLocalCoords, |
| 528 | bool wideColor) { |
| 529 | return sk_sp<GrGeometryProcessor>( |
| 530 | new QuadEdgeEffect(localMatrix, usesLocalCoords, wideColor)); |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 531 | } |
| 532 | |
Brian Salomon | d3b6597 | 2017-03-22 12:05:03 -0400 | [diff] [blame] | 533 | ~QuadEdgeEffect() override {} |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 534 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 535 | const char* name() const override { return "QuadEdge"; } |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 536 | |
egdaniel | 57d3b03 | 2015-11-13 11:57:27 -0800 | [diff] [blame] | 537 | class GLSLProcessor : public GrGLSLGeometryProcessor { |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 538 | public: |
Brian Salomon | 60fb0b2 | 2017-06-15 17:09:36 -0400 | [diff] [blame] | 539 | GLSLProcessor() {} |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 540 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 541 | void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override { |
joshualitt | 2dd1ae0 | 2014-12-03 06:24:10 -0800 | [diff] [blame] | 542 | const QuadEdgeEffect& qe = args.fGP.cast<QuadEdgeEffect>(); |
egdaniel | 4ca2e60 | 2015-11-18 08:01:26 -0800 | [diff] [blame] | 543 | GrGLSLVertexBuilder* vertBuilder = args.fVertBuilder; |
egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 544 | GrGLSLVaryingHandler* varyingHandler = args.fVaryingHandler; |
egdaniel | 7ea439b | 2015-12-03 09:20:44 -0800 | [diff] [blame] | 545 | GrGLSLUniformHandler* uniformHandler = args.fUniformHandler; |
joshualitt | 2dd1ae0 | 2014-12-03 06:24:10 -0800 | [diff] [blame] | 546 | |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 547 | // emit attributes |
egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 548 | varyingHandler->emitAttributes(qe); |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 549 | |
Chris Dalton | 2737288 | 2017-12-08 13:34:21 -0700 | [diff] [blame] | 550 | GrGLSLVarying v(kHalf4_GrSLType); |
egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 551 | varyingHandler->addVarying("QuadEdge", &v); |
Brian Osman | f04fb3c | 2018-11-12 15:34:00 -0500 | [diff] [blame] | 552 | vertBuilder->codeAppendf("%s = %s;", v.vsOut(), qe.fInQuadEdge.name()); |
Brian Salomon | 60fb0b2 | 2017-06-15 17:09:36 -0400 | [diff] [blame] | 553 | |
| 554 | // Setup pass through color |
Brian Osman | f04fb3c | 2018-11-12 15:34:00 -0500 | [diff] [blame] | 555 | varyingHandler->addPassThroughAttribute(qe.fInColor, args.fOutputColor); |
joshualitt | 2dd1ae0 | 2014-12-03 06:24:10 -0800 | [diff] [blame] | 556 | |
Chris Dalton | 6028361 | 2018-02-14 13:38:14 -0700 | [diff] [blame] | 557 | GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder; |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 558 | |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 559 | // Setup position |
Brian Osman | f04fb3c | 2018-11-12 15:34:00 -0500 | [diff] [blame] | 560 | this->writeOutputPosition(vertBuilder, gpArgs, qe.fInPosition.name()); |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 561 | |
| 562 | // emit transforms |
egdaniel | 7ea439b | 2015-12-03 09:20:44 -0800 | [diff] [blame] | 563 | this->emitTransforms(vertBuilder, |
egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 564 | varyingHandler, |
egdaniel | 7ea439b | 2015-12-03 09:20:44 -0800 | [diff] [blame] | 565 | uniformHandler, |
Brian Osman | f04fb3c | 2018-11-12 15:34:00 -0500 | [diff] [blame] | 566 | qe.fInPosition.asShaderVar(), |
Brian Salomon | 60fb0b2 | 2017-06-15 17:09:36 -0400 | [diff] [blame] | 567 | qe.fLocalMatrix, |
bsalomon | a624bf3 | 2016-09-20 09:12:47 -0700 | [diff] [blame] | 568 | args.fFPCoordTransformHandler); |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 569 | |
Ethan Nicholas | f7b8820 | 2017-09-18 14:10:39 -0400 | [diff] [blame] | 570 | fragBuilder->codeAppendf("half edgeAlpha;"); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 571 | |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 572 | // keep the derivative instructions outside the conditional |
Ethan Nicholas | e1f5502 | 2019-02-05 17:17:40 -0500 | [diff] [blame] | 573 | fragBuilder->codeAppendf("half2 duvdx = half2(dFdx(%s.xy));", v.fsIn()); |
| 574 | fragBuilder->codeAppendf("half2 duvdy = half2(dFdy(%s.xy));", v.fsIn()); |
egdaniel | 4ca2e60 | 2015-11-18 08:01:26 -0800 | [diff] [blame] | 575 | fragBuilder->codeAppendf("if (%s.z > 0.0 && %s.w > 0.0) {", v.fsIn(), v.fsIn()); |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 576 | // today we know z and w are in device space. We could use derivatives |
egdaniel | 4ca2e60 | 2015-11-18 08:01:26 -0800 | [diff] [blame] | 577 | fragBuilder->codeAppendf("edgeAlpha = min(min(%s.z, %s.w) + 0.5, 1.0);", v.fsIn(), |
| 578 | v.fsIn()); |
| 579 | fragBuilder->codeAppendf ("} else {"); |
Ethan Nicholas | f7b8820 | 2017-09-18 14:10:39 -0400 | [diff] [blame] | 580 | fragBuilder->codeAppendf("half2 gF = half2(2.0*%s.x*duvdx.x - duvdx.y," |
egdaniel | 4ca2e60 | 2015-11-18 08:01:26 -0800 | [diff] [blame] | 581 | " 2.0*%s.x*duvdy.x - duvdy.y);", |
| 582 | v.fsIn(), v.fsIn()); |
| 583 | fragBuilder->codeAppendf("edgeAlpha = (%s.x*%s.x - %s.y);", v.fsIn(), v.fsIn(), |
| 584 | v.fsIn()); |
| 585 | fragBuilder->codeAppendf("edgeAlpha = " |
Ethan Nicholas | 12fb9cf | 2018-08-03 16:16:57 -0400 | [diff] [blame] | 586 | "saturate(0.5 - edgeAlpha / length(gF));}"); |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 587 | |
Ethan Nicholas | f7b8820 | 2017-09-18 14:10:39 -0400 | [diff] [blame] | 588 | fragBuilder->codeAppendf("%s = half4(edgeAlpha);", args.fOutputCoverage); |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 589 | } |
| 590 | |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 591 | static inline void GenKey(const GrGeometryProcessor& gp, |
Brian Salomon | 94efbf5 | 2016-11-29 13:43:05 -0500 | [diff] [blame] | 592 | const GrShaderCaps&, |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 593 | GrProcessorKeyBuilder* b) { |
joshualitt | e3ababe | 2015-05-15 07:56:07 -0700 | [diff] [blame] | 594 | const QuadEdgeEffect& qee = gp.cast<QuadEdgeEffect>(); |
Brian Salomon | 60fb0b2 | 2017-06-15 17:09:36 -0400 | [diff] [blame] | 595 | b->add32(SkToBool(qee.fUsesLocalCoords && qee.fLocalMatrix.hasPerspective())); |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 596 | } |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 597 | |
egdaniel | 018fb62 | 2015-10-28 07:26:40 -0700 | [diff] [blame] | 598 | void setData(const GrGLSLProgramDataManager& pdman, |
bsalomon | a624bf3 | 2016-09-20 09:12:47 -0700 | [diff] [blame] | 599 | const GrPrimitiveProcessor& gp, |
| 600 | FPCoordTransformIter&& transformIter) override { |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 601 | const QuadEdgeEffect& qe = gp.cast<QuadEdgeEffect>(); |
bsalomon | a624bf3 | 2016-09-20 09:12:47 -0700 | [diff] [blame] | 602 | this->setTransformDataHelper(qe.fLocalMatrix, pdman, &transformIter); |
joshualitt | e3ababe | 2015-05-15 07:56:07 -0700 | [diff] [blame] | 603 | } |
| 604 | |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 605 | private: |
egdaniel | e659a58 | 2015-11-13 09:55:43 -0800 | [diff] [blame] | 606 | typedef GrGLSLGeometryProcessor INHERITED; |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 607 | }; |
skia.committer@gmail.com | 041e2db | 2013-04-03 07:01:14 +0000 | [diff] [blame] | 608 | |
Brian Salomon | 94efbf5 | 2016-11-29 13:43:05 -0500 | [diff] [blame] | 609 | void getGLSLProcessorKey(const GrShaderCaps& caps, GrProcessorKeyBuilder* b) const override { |
egdaniel | 57d3b03 | 2015-11-13 11:57:27 -0800 | [diff] [blame] | 610 | GLSLProcessor::GenKey(*this, caps, b); |
joshualitt | eb2a676 | 2014-12-04 11:35:33 -0800 | [diff] [blame] | 611 | } |
| 612 | |
Brian Salomon | 94efbf5 | 2016-11-29 13:43:05 -0500 | [diff] [blame] | 613 | GrGLSLPrimitiveProcessor* createGLSLInstance(const GrShaderCaps&) const override { |
egdaniel | 57d3b03 | 2015-11-13 11:57:27 -0800 | [diff] [blame] | 614 | return new GLSLProcessor(); |
joshualitt | eb2a676 | 2014-12-04 11:35:33 -0800 | [diff] [blame] | 615 | } |
| 616 | |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 617 | private: |
Brian Osman | 7f4735b | 2019-01-02 13:55:10 +0000 | [diff] [blame] | 618 | QuadEdgeEffect(const SkMatrix& localMatrix, bool usesLocalCoords, bool wideColor) |
Ethan Nicholas | abff956 | 2017-10-09 10:54:08 -0400 | [diff] [blame] | 619 | : INHERITED(kQuadEdgeEffect_ClassID) |
| 620 | , fLocalMatrix(localMatrix) |
| 621 | , fUsesLocalCoords(usesLocalCoords) { |
Brian Osman | f04fb3c | 2018-11-12 15:34:00 -0500 | [diff] [blame] | 622 | fInPosition = {"inPosition", kFloat2_GrVertexAttribType, kFloat2_GrSLType}; |
Brian Osman | 7f4735b | 2019-01-02 13:55:10 +0000 | [diff] [blame] | 623 | fInColor = MakeColorAttribute("inColor", wideColor); |
Brian Osman | f04fb3c | 2018-11-12 15:34:00 -0500 | [diff] [blame] | 624 | fInQuadEdge = {"inQuadEdge", kFloat4_GrVertexAttribType, kHalf4_GrSLType}; |
| 625 | this->setVertexAttributes(&fInPosition, 3); |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 626 | } |
| 627 | |
Brian Osman | f04fb3c | 2018-11-12 15:34:00 -0500 | [diff] [blame] | 628 | Attribute fInPosition; |
| 629 | Attribute fInColor; |
| 630 | Attribute fInQuadEdge; |
| 631 | |
Brian Salomon | 92be2f7 | 2018-06-19 14:33:47 -0400 | [diff] [blame] | 632 | SkMatrix fLocalMatrix; |
| 633 | bool fUsesLocalCoords; |
joshualitt | 249af15 | 2014-09-15 11:41:13 -0700 | [diff] [blame] | 634 | |
Brian Salomon | 0c26a9d | 2017-07-06 10:09:38 -0400 | [diff] [blame] | 635 | GR_DECLARE_GEOMETRY_PROCESSOR_TEST |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 636 | |
joshualitt | 2e3b3e3 | 2014-12-09 13:31:14 -0800 | [diff] [blame] | 637 | typedef GrGeometryProcessor INHERITED; |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 638 | }; |
| 639 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 640 | GR_DEFINE_GEOMETRY_PROCESSOR_TEST(QuadEdgeEffect); |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 641 | |
Hal Canary | 6f6961e | 2017-01-31 13:50:44 -0500 | [diff] [blame] | 642 | #if GR_TEST_UTILS |
bungeman | 06ca8ec | 2016-06-09 08:01:03 -0700 | [diff] [blame] | 643 | sk_sp<GrGeometryProcessor> QuadEdgeEffect::TestCreate(GrProcessorTestData* d) { |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 644 | // Doesn't work without derivative instructions. |
Robert Phillips | 296b1cc | 2017-03-15 10:42:12 -0400 | [diff] [blame] | 645 | return d->caps()->shaderCaps()->shaderDerivativeSupport() |
Brian Osman | 7f4735b | 2019-01-02 13:55:10 +0000 | [diff] [blame] | 646 | ? QuadEdgeEffect::Make(GrTest::TestMatrix(d->fRandom), d->fRandom->nextBool(), |
| 647 | d->fRandom->nextBool()) |
Brian Salomon | 9ae32a2 | 2017-01-25 14:58:24 -0500 | [diff] [blame] | 648 | : nullptr; |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 649 | } |
Hal Canary | 6f6961e | 2017-01-31 13:50:44 -0500 | [diff] [blame] | 650 | #endif |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 651 | |
| 652 | /////////////////////////////////////////////////////////////////////////////// |
| 653 | |
Chris Dalton | 5ed4423 | 2017-09-07 13:22:46 -0600 | [diff] [blame] | 654 | GrPathRenderer::CanDrawPath |
| 655 | GrAAConvexPathRenderer::onCanDrawPath(const CanDrawPathArgs& args) const { |
| 656 | if (args.fCaps->shaderCaps()->shaderDerivativeSupport() && |
| 657 | (GrAAType::kCoverage == args.fAAType) && args.fShape->style().isSimpleFill() && |
| 658 | !args.fShape->inverseFilled() && args.fShape->knownToBeConvex()) { |
| 659 | return CanDrawPath::kYes; |
| 660 | } |
| 661 | return CanDrawPath::kNo; |
robertphillips@google.com | fa66294 | 2012-05-17 12:20:22 +0000 | [diff] [blame] | 662 | } |
| 663 | |
Brian Salomon | 10978a6 | 2017-06-15 16:21:49 -0400 | [diff] [blame] | 664 | namespace { |
| 665 | |
| 666 | class AAConvexPathOp final : public GrMeshDrawOp { |
| 667 | private: |
| 668 | using Helper = GrSimpleMeshDrawOpHelperWithStencil; |
| 669 | |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 670 | public: |
Brian Salomon | 25a8809 | 2016-12-01 09:36:50 -0500 | [diff] [blame] | 671 | DEFINE_OP_CLASS_ID |
Robert Phillips | b493eeb | 2017-09-13 13:10:52 -0400 | [diff] [blame] | 672 | |
Robert Phillips | b97da53 | 2019-02-12 15:24:12 -0500 | [diff] [blame] | 673 | static std::unique_ptr<GrDrawOp> Make(GrRecordingContext* context, |
Robert Phillips | 7c525e6 | 2018-06-12 10:11:12 -0400 | [diff] [blame] | 674 | GrPaint&& paint, |
| 675 | const SkMatrix& viewMatrix, |
Brian Salomon | 10978a6 | 2017-06-15 16:21:49 -0400 | [diff] [blame] | 676 | const SkPath& path, |
| 677 | const GrUserStencilSettings* stencilSettings) { |
Robert Phillips | 7c525e6 | 2018-06-12 10:11:12 -0400 | [diff] [blame] | 678 | return Helper::FactoryHelper<AAConvexPathOp>(context, std::move(paint), viewMatrix, path, |
Brian Salomon | 10978a6 | 2017-06-15 16:21:49 -0400 | [diff] [blame] | 679 | stencilSettings); |
| 680 | } |
| 681 | |
Brian Osman | cf86085 | 2018-10-31 14:04:39 -0400 | [diff] [blame] | 682 | AAConvexPathOp(const Helper::MakeArgs& helperArgs, const SkPMColor4f& color, |
Brian Osman | 936fe7d | 2018-10-30 15:30:35 -0400 | [diff] [blame] | 683 | const SkMatrix& viewMatrix, const SkPath& path, |
| 684 | const GrUserStencilSettings* stencilSettings) |
Brian Salomon | 60fb0b2 | 2017-06-15 17:09:36 -0400 | [diff] [blame] | 685 | : INHERITED(ClassID()), fHelper(helperArgs, GrAAType::kCoverage, stencilSettings) { |
| 686 | fPaths.emplace_back(PathData{viewMatrix, path, color}); |
Brian Salomon | 10978a6 | 2017-06-15 16:21:49 -0400 | [diff] [blame] | 687 | this->setTransformedBounds(path.getBounds(), viewMatrix, HasAABloat::kYes, IsZeroArea::kNo); |
Brian Osman | 7f4735b | 2019-01-02 13:55:10 +0000 | [diff] [blame] | 688 | fWideColor = !SkPMColor4fFitsInBytes(color); |
bsalomon | f170309 | 2016-06-29 18:41:53 -0700 | [diff] [blame] | 689 | } |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 690 | |
Brian Salomon | d0a0a65 | 2016-12-15 15:25:22 -0500 | [diff] [blame] | 691 | const char* name() const override { return "AAConvexPathOp"; } |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 692 | |
Brian Salomon | 7d94bb5 | 2018-10-12 14:37:19 -0400 | [diff] [blame] | 693 | void visitProxies(const VisitProxyFunc& func, VisitorType) const override { |
Robert Phillips | b493eeb | 2017-09-13 13:10:52 -0400 | [diff] [blame] | 694 | fHelper.visitProxies(func); |
| 695 | } |
| 696 | |
Brian Osman | 9a390ac | 2018-11-12 09:47:48 -0500 | [diff] [blame] | 697 | #ifdef SK_DEBUG |
Brian Salomon | 7c3e718 | 2016-12-01 09:35:30 -0500 | [diff] [blame] | 698 | SkString dumpInfo() const override { |
| 699 | SkString string; |
Brian Salomon | 60fb0b2 | 2017-06-15 17:09:36 -0400 | [diff] [blame] | 700 | string.appendf("Count: %d\n", fPaths.count()); |
Brian Salomon | 10978a6 | 2017-06-15 16:21:49 -0400 | [diff] [blame] | 701 | string += fHelper.dumpInfo(); |
| 702 | string += INHERITED::dumpInfo(); |
Brian Salomon | 7c3e718 | 2016-12-01 09:35:30 -0500 | [diff] [blame] | 703 | return string; |
| 704 | } |
Brian Osman | 9a390ac | 2018-11-12 09:47:48 -0500 | [diff] [blame] | 705 | #endif |
Brian Salomon | 7c3e718 | 2016-12-01 09:35:30 -0500 | [diff] [blame] | 706 | |
Brian Salomon | 10978a6 | 2017-06-15 16:21:49 -0400 | [diff] [blame] | 707 | FixedFunctionFlags fixedFunctionFlags() const override { return fHelper.fixedFunctionFlags(); } |
| 708 | |
Chris Dalton | b8fff0d | 2019-03-05 10:11:58 -0700 | [diff] [blame^] | 709 | GrProcessorSet::Analysis finalize( |
| 710 | const GrCaps& caps, const GrAppliedClip* clip, GrFSAAType fsaaType) override { |
| 711 | return fHelper.finalizeProcessors( |
| 712 | caps, clip, fsaaType, GrProcessorAnalysisCoverage::kSingleChannel, |
| 713 | &fPaths.back().fColor); |
Brian Salomon | 10978a6 | 2017-06-15 16:21:49 -0400 | [diff] [blame] | 714 | } |
| 715 | |
bsalomon | e46f9fe | 2015-08-18 06:05:14 -0700 | [diff] [blame] | 716 | private: |
Brian Salomon | 91326c3 | 2017-08-09 16:02:19 -0400 | [diff] [blame] | 717 | void onPrepareDraws(Target* target) override { |
Brian Salomon | d0a0a65 | 2016-12-15 15:25:22 -0500 | [diff] [blame] | 718 | int instanceCount = fPaths.count(); |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 719 | |
| 720 | SkMatrix invert; |
Brian Salomon | 10978a6 | 2017-06-15 16:21:49 -0400 | [diff] [blame] | 721 | if (fHelper.usesLocalCoords() && !fPaths.back().fViewMatrix.invert(&invert)) { |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 722 | return; |
| 723 | } |
| 724 | |
| 725 | // Setup GrGeometryProcessor |
bungeman | 06ca8ec | 2016-06-09 08:01:03 -0700 | [diff] [blame] | 726 | sk_sp<GrGeometryProcessor> quadProcessor( |
Brian Osman | 7f4735b | 2019-01-02 13:55:10 +0000 | [diff] [blame] | 727 | QuadEdgeEffect::Make(invert, fHelper.usesLocalCoords(), fWideColor)); |
| 728 | const size_t kVertexStride = quadProcessor->vertexStride(); |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 729 | |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 730 | // TODO generate all segments for all paths and use one vertex buffer |
| 731 | for (int i = 0; i < instanceCount; i++) { |
Brian Salomon | d0a0a65 | 2016-12-15 15:25:22 -0500 | [diff] [blame] | 732 | const PathData& args = fPaths[i]; |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 733 | |
| 734 | // We use the fact that SkPath::transform path does subdivision based on |
| 735 | // perspective. Otherwise, we apply the view matrix when copying to the |
| 736 | // segment representation. |
| 737 | const SkMatrix* viewMatrix = &args.fViewMatrix; |
joshualitt | 144c3c8 | 2015-11-30 12:30:13 -0800 | [diff] [blame] | 738 | |
| 739 | // We avoid initializing the path unless we have to |
| 740 | const SkPath* pathPtr = &args.fPath; |
| 741 | SkTLazy<SkPath> tmpPath; |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 742 | if (viewMatrix->hasPerspective()) { |
joshualitt | 144c3c8 | 2015-11-30 12:30:13 -0800 | [diff] [blame] | 743 | SkPath* tmpPathPtr = tmpPath.init(*pathPtr); |
| 744 | tmpPathPtr->setIsVolatile(true); |
| 745 | tmpPathPtr->transform(*viewMatrix); |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 746 | viewMatrix = &SkMatrix::I(); |
joshualitt | 144c3c8 | 2015-11-30 12:30:13 -0800 | [diff] [blame] | 747 | pathPtr = tmpPathPtr; |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 748 | } |
| 749 | |
| 750 | int vertexCount; |
| 751 | int indexCount; |
| 752 | enum { |
| 753 | kPreallocSegmentCnt = 512 / sizeof(Segment), |
| 754 | kPreallocDrawCnt = 4, |
| 755 | }; |
| 756 | SkSTArray<kPreallocSegmentCnt, Segment, true> segments; |
| 757 | SkPoint fanPt; |
| 758 | |
joshualitt | 144c3c8 | 2015-11-30 12:30:13 -0800 | [diff] [blame] | 759 | if (!get_segments(*pathPtr, *viewMatrix, &segments, &fanPt, &vertexCount, |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 760 | &indexCount)) { |
| 761 | continue; |
| 762 | } |
| 763 | |
Brian Salomon | 12d2264 | 2019-01-29 14:38:50 -0500 | [diff] [blame] | 764 | sk_sp<const GrBuffer> vertexBuffer; |
Chris Dalton | bca46e2 | 2017-05-15 11:03:26 -0600 | [diff] [blame] | 765 | int firstVertex; |
| 766 | |
Brian Osman | d2fa2eb | 2018-12-26 16:48:40 -0500 | [diff] [blame] | 767 | GrVertexWriter verts{target->makeVertexSpace(kVertexStride, vertexCount, |
| 768 | &vertexBuffer, &firstVertex)}; |
bsalomon | e64eb57 | 2015-05-07 11:35:55 -0700 | [diff] [blame] | 769 | |
Brian Osman | d2fa2eb | 2018-12-26 16:48:40 -0500 | [diff] [blame] | 770 | if (!verts.fPtr) { |
joshualitt | 4b31de8 | 2015-03-05 14:33:41 -0800 | [diff] [blame] | 771 | SkDebugf("Could not allocate vertices\n"); |
| 772 | return; |
| 773 | } |
| 774 | |
Brian Salomon | 12d2264 | 2019-01-29 14:38:50 -0500 | [diff] [blame] | 775 | sk_sp<const GrBuffer> indexBuffer; |
Chris Dalton | bca46e2 | 2017-05-15 11:03:26 -0600 | [diff] [blame] | 776 | int firstIndex; |
| 777 | |
| 778 | uint16_t *idxs = target->makeIndexSpace(indexCount, &indexBuffer, &firstIndex); |
robertphillips | e40d397 | 2015-05-07 09:51:43 -0700 | [diff] [blame] | 779 | if (!idxs) { |
joshualitt | 4b31de8 | 2015-03-05 14:33:41 -0800 | [diff] [blame] | 780 | SkDebugf("Could not allocate indices\n"); |
| 781 | return; |
| 782 | } |
| 783 | |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 784 | SkSTArray<kPreallocDrawCnt, Draw, true> draws; |
Brian Osman | 7f4735b | 2019-01-02 13:55:10 +0000 | [diff] [blame] | 785 | GrVertexColor color(args.fColor, fWideColor); |
| 786 | create_vertices(segments, fanPt, color, &draws, verts, idxs, kVertexStride); |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 787 | |
Brian Salomon | 7eae3e0 | 2018-08-07 14:02:38 +0000 | [diff] [blame] | 788 | GrMesh* meshes = target->allocMeshes(draws.count()); |
robertphillips | 44c3128 | 2015-09-03 12:58:48 -0700 | [diff] [blame] | 789 | for (int j = 0; j < draws.count(); ++j) { |
| 790 | const Draw& draw = draws[j]; |
Brian Salomon | 7eae3e0 | 2018-08-07 14:02:38 +0000 | [diff] [blame] | 791 | meshes[j].setPrimitiveType(GrPrimitiveType::kTriangles); |
| 792 | meshes[j].setIndexed(indexBuffer, draw.fIndexCnt, firstIndex, 0, |
| 793 | draw.fVertexCnt - 1, GrPrimitiveRestart::kNo); |
| 794 | meshes[j].setVertexData(vertexBuffer, firstVertex); |
Chris Dalton | bca46e2 | 2017-05-15 11:03:26 -0600 | [diff] [blame] | 795 | firstIndex += draw.fIndexCnt; |
| 796 | firstVertex += draw.fVertexCnt; |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 797 | } |
Chris Dalton | 07cdcfc9 | 2019-02-26 11:13:22 -0700 | [diff] [blame] | 798 | target->recordDraw(quadProcessor, meshes, draws.count()); |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 799 | } |
| 800 | } |
| 801 | |
Chris Dalton | 07cdcfc9 | 2019-02-26 11:13:22 -0700 | [diff] [blame] | 802 | void onExecute(GrOpFlushState* flushState, const SkRect& chainBounds) override { |
| 803 | fHelper.executeDrawsAndUploads(this, flushState, chainBounds); |
| 804 | } |
| 805 | |
Brian Salomon | 7eae3e0 | 2018-08-07 14:02:38 +0000 | [diff] [blame] | 806 | CombineResult onCombineIfPossible(GrOp* t, const GrCaps& caps) override { |
Brian Salomon | d0a0a65 | 2016-12-15 15:25:22 -0500 | [diff] [blame] | 807 | AAConvexPathOp* that = t->cast<AAConvexPathOp>(); |
Brian Salomon | 10978a6 | 2017-06-15 16:21:49 -0400 | [diff] [blame] | 808 | if (!fHelper.isCompatible(that->fHelper, caps, this->bounds(), that->bounds())) { |
Brian Salomon | 7eae3e0 | 2018-08-07 14:02:38 +0000 | [diff] [blame] | 809 | return CombineResult::kCannotCombine; |
joshualitt | 8cab9a7 | 2015-07-16 09:13:50 -0700 | [diff] [blame] | 810 | } |
Brian Salomon | 10978a6 | 2017-06-15 16:21:49 -0400 | [diff] [blame] | 811 | if (fHelper.usesLocalCoords() && |
| 812 | !fPaths[0].fViewMatrix.cheapEqualTo(that->fPaths[0].fViewMatrix)) { |
Brian Salomon | 7eae3e0 | 2018-08-07 14:02:38 +0000 | [diff] [blame] | 813 | return CombineResult::kCannotCombine; |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 814 | } |
| 815 | |
Brian Salomon | d0a0a65 | 2016-12-15 15:25:22 -0500 | [diff] [blame] | 816 | fPaths.push_back_n(that->fPaths.count(), that->fPaths.begin()); |
Brian Osman | 7f4735b | 2019-01-02 13:55:10 +0000 | [diff] [blame] | 817 | fWideColor |= that->fWideColor; |
Brian Salomon | 7eae3e0 | 2018-08-07 14:02:38 +0000 | [diff] [blame] | 818 | return CombineResult::kMerged; |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 819 | } |
| 820 | |
Brian Salomon | d0a0a65 | 2016-12-15 15:25:22 -0500 | [diff] [blame] | 821 | struct PathData { |
bsalomon | f170309 | 2016-06-29 18:41:53 -0700 | [diff] [blame] | 822 | SkMatrix fViewMatrix; |
| 823 | SkPath fPath; |
Brian Osman | cf86085 | 2018-10-31 14:04:39 -0400 | [diff] [blame] | 824 | SkPMColor4f fColor; |
bsalomon | f170309 | 2016-06-29 18:41:53 -0700 | [diff] [blame] | 825 | }; |
| 826 | |
Brian Salomon | 10978a6 | 2017-06-15 16:21:49 -0400 | [diff] [blame] | 827 | Helper fHelper; |
Brian Salomon | d0a0a65 | 2016-12-15 15:25:22 -0500 | [diff] [blame] | 828 | SkSTArray<1, PathData, true> fPaths; |
Brian Osman | 7f4735b | 2019-01-02 13:55:10 +0000 | [diff] [blame] | 829 | bool fWideColor; |
reed | 1b55a96 | 2015-09-17 20:16:13 -0700 | [diff] [blame] | 830 | |
Brian Salomon | 10978a6 | 2017-06-15 16:21:49 -0400 | [diff] [blame] | 831 | typedef GrMeshDrawOp INHERITED; |
joshualitt | 27f398f | 2015-02-05 14:39:01 -0800 | [diff] [blame] | 832 | }; |
| 833 | |
Brian Salomon | 10978a6 | 2017-06-15 16:21:49 -0400 | [diff] [blame] | 834 | } // anonymous namespace |
| 835 | |
bsalomon | 0aff2fa | 2015-07-31 06:48:27 -0700 | [diff] [blame] | 836 | bool GrAAConvexPathRenderer::onDrawPath(const DrawPathArgs& args) { |
Brian Osman | 1105224 | 2016-10-27 14:47:55 -0400 | [diff] [blame] | 837 | GR_AUDIT_TRAIL_AUTO_FRAME(args.fRenderTargetContext->auditTrail(), |
robertphillips | 976f5f0 | 2016-06-03 10:59:20 -0700 | [diff] [blame] | 838 | "GrAAConvexPathRenderer::onDrawPath"); |
Brian Salomon | 7c8460e | 2017-05-12 11:36:10 -0400 | [diff] [blame] | 839 | SkASSERT(GrFSAAType::kUnifiedMSAA != args.fRenderTargetContext->fsaaType()); |
bsalomon | 8acedde | 2016-06-24 10:42:16 -0700 | [diff] [blame] | 840 | SkASSERT(!args.fShape->isEmpty()); |
bsalomon@google.com | 4647f90 | 2013-03-26 14:45:27 +0000 | [diff] [blame] | 841 | |
bsalomon | f170309 | 2016-06-29 18:41:53 -0700 | [diff] [blame] | 842 | SkPath path; |
| 843 | args.fShape->asPath(&path); |
bsalomon@google.com | af90f7f | 2012-03-05 20:50:10 +0000 | [diff] [blame] | 844 | |
Robert Phillips | 7c525e6 | 2018-06-12 10:11:12 -0400 | [diff] [blame] | 845 | std::unique_ptr<GrDrawOp> op = AAConvexPathOp::Make(args.fContext, std::move(args.fPaint), |
| 846 | *args.fViewMatrix, |
Brian Salomon | 10978a6 | 2017-06-15 16:21:49 -0400 | [diff] [blame] | 847 | path, args.fUserStencilSettings); |
| 848 | args.fRenderTargetContext->addDrawOp(*args.fClip, std::move(op)); |
bsalomon@google.com | c2099d2 | 2012-03-02 21:26:50 +0000 | [diff] [blame] | 849 | return true; |
bsalomon@google.com | 69cc6ad | 2012-01-17 14:25:10 +0000 | [diff] [blame] | 850 | } |
joshualitt | 8e5c177 | 2015-05-11 08:58:52 -0700 | [diff] [blame] | 851 | |
| 852 | /////////////////////////////////////////////////////////////////////////////////////////////////// |
| 853 | |
Hal Canary | 6f6961e | 2017-01-31 13:50:44 -0500 | [diff] [blame] | 854 | #if GR_TEST_UTILS |
joshualitt | 8e5c177 | 2015-05-11 08:58:52 -0700 | [diff] [blame] | 855 | |
Brian Salomon | 10978a6 | 2017-06-15 16:21:49 -0400 | [diff] [blame] | 856 | GR_DRAW_OP_TEST_DEFINE(AAConvexPathOp) { |
bsalomon | f170309 | 2016-06-29 18:41:53 -0700 | [diff] [blame] | 857 | SkMatrix viewMatrix = GrTest::TestMatrixInvertible(random); |
| 858 | SkPath path = GrTest::TestPathConvex(random); |
Brian Salomon | 10978a6 | 2017-06-15 16:21:49 -0400 | [diff] [blame] | 859 | const GrUserStencilSettings* stencilSettings = GrGetRandomStencil(random, context); |
Robert Phillips | 7c525e6 | 2018-06-12 10:11:12 -0400 | [diff] [blame] | 860 | return AAConvexPathOp::Make(context, std::move(paint), viewMatrix, path, stencilSettings); |
joshualitt | 8e5c177 | 2015-05-11 08:58:52 -0700 | [diff] [blame] | 861 | } |
| 862 | |
| 863 | #endif |