commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2014 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 | |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 8 | #include "gl/builders/GrGLProgramBuilder.h" |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 9 | #include "GrConvexPolyEffect.h" |
| 10 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 11 | #include "gl/GrGLProcessor.h" |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 12 | #include "gl/GrGLSL.h" |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 13 | #include "GrTBackendProcessorFactory.h" |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 14 | |
| 15 | #include "SkPath.h" |
| 16 | |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 17 | ////////////////////////////////////////////////////////////////////////////// |
| 18 | class GLAARectEffect; |
| 19 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 20 | class AARectEffect : public GrFragmentProcessor { |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 21 | public: |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 22 | typedef GLAARectEffect GLProcessor; |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 23 | |
| 24 | const SkRect& getRect() const { return fRect; } |
| 25 | |
| 26 | static const char* Name() { return "AARect"; } |
| 27 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 28 | static GrFragmentProcessor* Create(GrPrimitiveEdgeType edgeType, const SkRect& rect) { |
bsalomon | 55fad7a | 2014-07-08 07:34:20 -0700 | [diff] [blame] | 29 | return SkNEW_ARGS(AARectEffect, (edgeType, rect)); |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 30 | } |
| 31 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 32 | GrPrimitiveEdgeType getEdgeType() const { return fEdgeType; } |
commit-bot@chromium.org | d85f32c | 2014-02-28 14:43:26 +0000 | [diff] [blame] | 33 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 34 | virtual const GrBackendFragmentProcessorFactory& getFactory() const SK_OVERRIDE; |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 35 | |
| 36 | private: |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 37 | AARectEffect(GrPrimitiveEdgeType edgeType, const SkRect& rect) : fRect(rect), fEdgeType(edgeType) { |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 38 | this->setWillReadFragmentPosition(); |
| 39 | } |
| 40 | |
bsalomon | 0e08fc1 | 2014-10-15 08:19:04 -0700 | [diff] [blame^] | 41 | virtual bool onIsEqual(const GrFragmentProcessor& other) const SK_OVERRIDE { |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame] | 42 | const AARectEffect& aare = other.cast<AARectEffect>(); |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 43 | return fRect == aare.fRect; |
| 44 | } |
| 45 | |
egdaniel | 1a8ecdf | 2014-10-03 06:24:12 -0700 | [diff] [blame] | 46 | virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERRIDE { |
| 47 | if (fRect.isEmpty()) { |
| 48 | // An empty rect will have no coverage anywhere. |
egdaniel | ccb2e38 | 2014-10-13 12:53:46 -0700 | [diff] [blame] | 49 | inout->setToTransparentBlack(); |
egdaniel | 1a8ecdf | 2014-10-03 06:24:12 -0700 | [diff] [blame] | 50 | } else { |
egdaniel | ccb2e38 | 2014-10-13 12:53:46 -0700 | [diff] [blame] | 51 | inout->mulByUnknownAlpha(); |
egdaniel | 1a8ecdf | 2014-10-03 06:24:12 -0700 | [diff] [blame] | 52 | } |
egdaniel | 1a8ecdf | 2014-10-03 06:24:12 -0700 | [diff] [blame] | 53 | } |
| 54 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 55 | SkRect fRect; |
| 56 | GrPrimitiveEdgeType fEdgeType; |
commit-bot@chromium.org | d85f32c | 2014-02-28 14:43:26 +0000 | [diff] [blame] | 57 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 58 | typedef GrFragmentProcessor INHERITED; |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 59 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 60 | GR_DECLARE_FRAGMENT_PROCESSOR_TEST; |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 61 | |
| 62 | }; |
| 63 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 64 | GR_DEFINE_FRAGMENT_PROCESSOR_TEST(AARectEffect); |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 65 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 66 | GrFragmentProcessor* AARectEffect::TestCreate(SkRandom* random, |
| 67 | GrContext*, |
| 68 | const GrDrawTargetCaps& caps, |
| 69 | GrTexture*[]) { |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 70 | SkRect rect = SkRect::MakeLTRB(random->nextSScalar1(), |
| 71 | random->nextSScalar1(), |
| 72 | random->nextSScalar1(), |
| 73 | random->nextSScalar1()); |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 74 | GrFragmentProcessor* fp; |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 75 | do { |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 76 | GrPrimitiveEdgeType edgeType = static_cast<GrPrimitiveEdgeType>(random->nextULessThan( |
| 77 | kGrProcessorEdgeTypeCnt)); |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 78 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 79 | fp = AARectEffect::Create(edgeType, rect); |
| 80 | } while (NULL == fp); |
| 81 | return fp; |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 82 | } |
| 83 | |
| 84 | ////////////////////////////////////////////////////////////////////////////// |
| 85 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 86 | class GLAARectEffect : public GrGLFragmentProcessor { |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 87 | public: |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 88 | GLAARectEffect(const GrBackendProcessorFactory&, const GrProcessor&); |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 89 | |
joshualitt | 1598899 | 2014-10-09 15:04:05 -0700 | [diff] [blame] | 90 | virtual void emitCode(GrGLFPBuilder* builder, |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 91 | const GrFragmentProcessor& fp, |
| 92 | const GrProcessorKey& key, |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 93 | const char* outputColor, |
| 94 | const char* inputColor, |
| 95 | const TransformedCoordsArray&, |
| 96 | const TextureSamplerArray&) SK_OVERRIDE; |
| 97 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 98 | static inline void GenKey(const GrProcessor&, const GrGLCaps&, GrProcessorKeyBuilder*); |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 99 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 100 | virtual void setData(const GrGLProgramDataManager&, const GrProcessor&) SK_OVERRIDE; |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 101 | |
| 102 | private: |
kkinnunen | 7510b22 | 2014-07-30 00:04:16 -0700 | [diff] [blame] | 103 | GrGLProgramDataManager::UniformHandle fRectUniform; |
| 104 | SkRect fPrevRect; |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 105 | typedef GrGLFragmentProcessor INHERITED; |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 106 | }; |
| 107 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 108 | GLAARectEffect::GLAARectEffect(const GrBackendProcessorFactory& factory, |
| 109 | const GrProcessor& effect) |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 110 | : INHERITED (factory) { |
| 111 | fPrevRect.fLeft = SK_ScalarNaN; |
| 112 | } |
| 113 | |
joshualitt | 1598899 | 2014-10-09 15:04:05 -0700 | [diff] [blame] | 114 | void GLAARectEffect::emitCode(GrGLFPBuilder* builder, |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 115 | const GrFragmentProcessor& fp, |
| 116 | const GrProcessorKey& key, |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 117 | const char* outputColor, |
| 118 | const char* inputColor, |
| 119 | const TransformedCoordsArray&, |
| 120 | const TextureSamplerArray& samplers) { |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 121 | const AARectEffect& aare = fp.cast<AARectEffect>(); |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 122 | const char *rectName; |
commit-bot@chromium.org | d85f32c | 2014-02-28 14:43:26 +0000 | [diff] [blame] | 123 | // The rect uniform's xyzw refer to (left + 0.5, top + 0.5, right - 0.5, bottom - 0.5), |
| 124 | // respectively. |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 125 | fRectUniform = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility, |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 126 | kVec4f_GrSLType, |
| 127 | "rect", |
| 128 | &rectName); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 129 | |
joshualitt | 1598899 | 2014-10-09 15:04:05 -0700 | [diff] [blame] | 130 | GrGLFPFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder(); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 131 | const char* fragmentPos = fsBuilder->fragmentPosition(); |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 132 | if (GrProcessorEdgeTypeIsAA(aare.getEdgeType())) { |
commit-bot@chromium.org | d85f32c | 2014-02-28 14:43:26 +0000 | [diff] [blame] | 133 | // The amount of coverage removed in x and y by the edges is computed as a pair of negative |
| 134 | // numbers, xSub and ySub. |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 135 | fsBuilder->codeAppend("\t\tfloat xSub, ySub;\n"); |
| 136 | fsBuilder->codeAppendf("\t\txSub = min(%s.x - %s.x, 0.0);\n", fragmentPos, rectName); |
| 137 | fsBuilder->codeAppendf("\t\txSub += min(%s.z - %s.x, 0.0);\n", rectName, fragmentPos); |
| 138 | fsBuilder->codeAppendf("\t\tySub = min(%s.y - %s.y, 0.0);\n", fragmentPos, rectName); |
| 139 | fsBuilder->codeAppendf("\t\tySub += min(%s.w - %s.y, 0.0);\n", rectName, fragmentPos); |
commit-bot@chromium.org | d85f32c | 2014-02-28 14:43:26 +0000 | [diff] [blame] | 140 | // Now compute coverage in x and y and multiply them to get the fraction of the pixel |
| 141 | // covered. |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 142 | fsBuilder->codeAppendf("\t\tfloat alpha = (1.0 + max(xSub, -1.0)) * (1.0 + max(ySub, -1.0));\n"); |
commit-bot@chromium.org | d85f32c | 2014-02-28 14:43:26 +0000 | [diff] [blame] | 143 | } else { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 144 | fsBuilder->codeAppendf("\t\tfloat alpha = 1.0;\n"); |
| 145 | fsBuilder->codeAppendf("\t\talpha *= (%s.x - %s.x) > -0.5 ? 1.0 : 0.0;\n", fragmentPos, rectName); |
| 146 | fsBuilder->codeAppendf("\t\talpha *= (%s.z - %s.x) > -0.5 ? 1.0 : 0.0;\n", rectName, fragmentPos); |
| 147 | fsBuilder->codeAppendf("\t\talpha *= (%s.y - %s.y) > -0.5 ? 1.0 : 0.0;\n", fragmentPos, rectName); |
| 148 | fsBuilder->codeAppendf("\t\talpha *= (%s.w - %s.y) > -0.5 ? 1.0 : 0.0;\n", rectName, fragmentPos); |
commit-bot@chromium.org | d85f32c | 2014-02-28 14:43:26 +0000 | [diff] [blame] | 149 | } |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 150 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 151 | if (GrProcessorEdgeTypeIsInverseFill(aare.getEdgeType())) { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 152 | fsBuilder->codeAppend("\t\talpha = 1.0 - alpha;\n"); |
commit-bot@chromium.org | d85f32c | 2014-02-28 14:43:26 +0000 | [diff] [blame] | 153 | } |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 154 | fsBuilder->codeAppendf("\t\t%s = %s;\n", outputColor, |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 155 | (GrGLSLExpr4(inputColor) * GrGLSLExpr1("alpha")).c_str()); |
| 156 | } |
| 157 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 158 | void GLAARectEffect::setData(const GrGLProgramDataManager& pdman, const GrProcessor& processor) { |
| 159 | const AARectEffect& aare = processor.cast<AARectEffect>(); |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 160 | const SkRect& rect = aare.getRect(); |
| 161 | if (rect != fPrevRect) { |
kkinnunen | 7510b22 | 2014-07-30 00:04:16 -0700 | [diff] [blame] | 162 | pdman.set4f(fRectUniform, rect.fLeft + 0.5f, rect.fTop + 0.5f, |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 163 | rect.fRight - 0.5f, rect.fBottom - 0.5f); |
| 164 | fPrevRect = rect; |
| 165 | } |
| 166 | } |
| 167 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 168 | void GLAARectEffect::GenKey(const GrProcessor& processor, const GrGLCaps&, |
| 169 | GrProcessorKeyBuilder* b) { |
| 170 | const AARectEffect& aare = processor.cast<AARectEffect>(); |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 171 | b->add32(aare.getEdgeType()); |
commit-bot@chromium.org | d85f32c | 2014-02-28 14:43:26 +0000 | [diff] [blame] | 172 | } |
| 173 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 174 | const GrBackendFragmentProcessorFactory& AARectEffect::getFactory() const { |
| 175 | return GrTBackendFragmentProcessorFactory<AARectEffect>::getInstance(); |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 176 | } |
| 177 | |
| 178 | ////////////////////////////////////////////////////////////////////////////// |
| 179 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 180 | class GrGLConvexPolyEffect : public GrGLFragmentProcessor { |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 181 | public: |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 182 | GrGLConvexPolyEffect(const GrBackendProcessorFactory&, const GrProcessor&); |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 183 | |
joshualitt | 1598899 | 2014-10-09 15:04:05 -0700 | [diff] [blame] | 184 | virtual void emitCode(GrGLFPBuilder* builder, |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 185 | const GrFragmentProcessor& fp, |
| 186 | const GrProcessorKey& key, |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 187 | const char* outputColor, |
| 188 | const char* inputColor, |
| 189 | const TransformedCoordsArray&, |
| 190 | const TextureSamplerArray&) SK_OVERRIDE; |
| 191 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 192 | static inline void GenKey(const GrProcessor&, const GrGLCaps&, GrProcessorKeyBuilder*); |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 193 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 194 | virtual void setData(const GrGLProgramDataManager&, const GrProcessor&) SK_OVERRIDE; |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 195 | |
| 196 | private: |
kkinnunen | 7510b22 | 2014-07-30 00:04:16 -0700 | [diff] [blame] | 197 | GrGLProgramDataManager::UniformHandle fEdgeUniform; |
| 198 | SkScalar fPrevEdges[3 * GrConvexPolyEffect::kMaxEdges]; |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 199 | typedef GrGLFragmentProcessor INHERITED; |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 200 | }; |
| 201 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 202 | GrGLConvexPolyEffect::GrGLConvexPolyEffect(const GrBackendProcessorFactory& factory, |
| 203 | const GrProcessor&) |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 204 | : INHERITED (factory) { |
| 205 | fPrevEdges[0] = SK_ScalarNaN; |
| 206 | } |
| 207 | |
joshualitt | 1598899 | 2014-10-09 15:04:05 -0700 | [diff] [blame] | 208 | void GrGLConvexPolyEffect::emitCode(GrGLFPBuilder* builder, |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 209 | const GrFragmentProcessor& fp, |
| 210 | const GrProcessorKey& key, |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 211 | const char* outputColor, |
| 212 | const char* inputColor, |
| 213 | const TransformedCoordsArray&, |
| 214 | const TextureSamplerArray& samplers) { |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 215 | const GrConvexPolyEffect& cpe = fp.cast<GrConvexPolyEffect>(); |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 216 | |
| 217 | const char *edgeArrayName; |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 218 | fEdgeUniform = builder->addUniformArray(GrGLProgramBuilder::kFragment_Visibility, |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 219 | kVec3f_GrSLType, |
| 220 | "edges", |
| 221 | cpe.getEdgeCount(), |
| 222 | &edgeArrayName); |
joshualitt | 1598899 | 2014-10-09 15:04:05 -0700 | [diff] [blame] | 223 | GrGLFPFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder(); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 224 | fsBuilder->codeAppend("\t\tfloat alpha = 1.0;\n"); |
| 225 | fsBuilder->codeAppend("\t\tfloat edge;\n"); |
| 226 | const char* fragmentPos = fsBuilder->fragmentPosition(); |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 227 | for (int i = 0; i < cpe.getEdgeCount(); ++i) { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 228 | fsBuilder->codeAppendf("\t\tedge = dot(%s[%d], vec3(%s.x, %s.y, 1));\n", |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 229 | edgeArrayName, i, fragmentPos, fragmentPos); |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 230 | if (GrProcessorEdgeTypeIsAA(cpe.getEdgeType())) { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 231 | fsBuilder->codeAppend("\t\tedge = clamp(edge, 0.0, 1.0);\n"); |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 232 | } else { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 233 | fsBuilder->codeAppend("\t\tedge = edge >= 0.5 ? 1.0 : 0.0;\n"); |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 234 | } |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 235 | fsBuilder->codeAppend("\t\talpha *= edge;\n"); |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 236 | } |
| 237 | |
commit-bot@chromium.org | 6dee875 | 2014-02-07 22:39:01 +0000 | [diff] [blame] | 238 | // Woe is me. See skbug.com/2149. |
| 239 | if (kTegra2_GrGLRenderer == builder->ctxInfo().renderer()) { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 240 | fsBuilder->codeAppend("\t\tif (-1.0 == alpha) {\n\t\t\tdiscard;\n\t\t}\n"); |
commit-bot@chromium.org | 6dee875 | 2014-02-07 22:39:01 +0000 | [diff] [blame] | 241 | } |
commit-bot@chromium.org | d85f32c | 2014-02-28 14:43:26 +0000 | [diff] [blame] | 242 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 243 | if (GrProcessorEdgeTypeIsInverseFill(cpe.getEdgeType())) { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 244 | fsBuilder->codeAppend("\talpha = 1.0 - alpha;\n"); |
commit-bot@chromium.org | d85f32c | 2014-02-28 14:43:26 +0000 | [diff] [blame] | 245 | } |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 246 | fsBuilder->codeAppendf("\t%s = %s;\n", outputColor, |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 247 | (GrGLSLExpr4(inputColor) * GrGLSLExpr1("alpha")).c_str()); |
| 248 | } |
| 249 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 250 | void GrGLConvexPolyEffect::setData(const GrGLProgramDataManager& pdman, const GrProcessor& effect) { |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame] | 251 | const GrConvexPolyEffect& cpe = effect.cast<GrConvexPolyEffect>(); |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 252 | size_t byteSize = 3 * cpe.getEdgeCount() * sizeof(SkScalar); |
| 253 | if (0 != memcmp(fPrevEdges, cpe.getEdges(), byteSize)) { |
kkinnunen | 7510b22 | 2014-07-30 00:04:16 -0700 | [diff] [blame] | 254 | pdman.set3fv(fEdgeUniform, cpe.getEdgeCount(), cpe.getEdges()); |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 255 | memcpy(fPrevEdges, cpe.getEdges(), byteSize); |
| 256 | } |
| 257 | } |
| 258 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 259 | void GrGLConvexPolyEffect::GenKey(const GrProcessor& processor, const GrGLCaps&, |
| 260 | GrProcessorKeyBuilder* b) { |
| 261 | const GrConvexPolyEffect& cpe = processor.cast<GrConvexPolyEffect>(); |
| 262 | GR_STATIC_ASSERT(kGrProcessorEdgeTypeCnt <= 8); |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 263 | uint32_t key = (cpe.getEdgeCount() << 3) | cpe.getEdgeType(); |
| 264 | b->add32(key); |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 265 | } |
| 266 | |
| 267 | ////////////////////////////////////////////////////////////////////////////// |
| 268 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 269 | GrFragmentProcessor* GrConvexPolyEffect::Create(GrPrimitiveEdgeType type, const SkPath& path, |
| 270 | const SkVector* offset) { |
| 271 | if (kHairlineAA_GrProcessorEdgeType == type) { |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 272 | return NULL; |
| 273 | } |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 274 | if (path.getSegmentMasks() != SkPath::kLine_SegmentMask || |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 275 | !path.isConvex()) { |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 276 | return NULL; |
| 277 | } |
| 278 | |
| 279 | if (path.countPoints() > kMaxEdges) { |
| 280 | return NULL; |
| 281 | } |
| 282 | |
| 283 | SkPoint pts[kMaxEdges]; |
| 284 | SkScalar edges[3 * kMaxEdges]; |
| 285 | |
| 286 | SkPath::Direction dir; |
| 287 | SkAssertResult(path.cheapComputeDirection(&dir)); |
| 288 | |
commit-bot@chromium.org | b21fac1 | 2014-02-07 21:13:11 +0000 | [diff] [blame] | 289 | SkVector t; |
| 290 | if (NULL == offset) { |
| 291 | t.set(0, 0); |
| 292 | } else { |
| 293 | t = *offset; |
| 294 | } |
| 295 | |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 296 | int count = path.getPoints(pts, kMaxEdges); |
| 297 | int n = 0; |
| 298 | for (int lastPt = count - 1, i = 0; i < count; lastPt = i++) { |
| 299 | if (pts[lastPt] != pts[i]) { |
| 300 | SkVector v = pts[i] - pts[lastPt]; |
| 301 | v.normalize(); |
| 302 | if (SkPath::kCCW_Direction == dir) { |
| 303 | edges[3 * n] = v.fY; |
| 304 | edges[3 * n + 1] = -v.fX; |
| 305 | } else { |
| 306 | edges[3 * n] = -v.fY; |
| 307 | edges[3 * n + 1] = v.fX; |
| 308 | } |
commit-bot@chromium.org | b21fac1 | 2014-02-07 21:13:11 +0000 | [diff] [blame] | 309 | SkPoint p = pts[i] + t; |
| 310 | edges[3 * n + 2] = -(edges[3 * n] * p.fX + edges[3 * n + 1] * p.fY); |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 311 | ++n; |
| 312 | } |
| 313 | } |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 314 | if (path.isInverseFillType()) { |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 315 | type = GrInvertProcessorEdgeType(type); |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 316 | } |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 317 | return Create(type, n, edges); |
| 318 | } |
| 319 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 320 | GrFragmentProcessor* GrConvexPolyEffect::Create(GrPrimitiveEdgeType edgeType, const SkRect& rect) { |
| 321 | if (kHairlineAA_GrProcessorEdgeType == edgeType){ |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 322 | return NULL; |
| 323 | } |
commit-bot@chromium.org | d85f32c | 2014-02-28 14:43:26 +0000 | [diff] [blame] | 324 | return AARectEffect::Create(edgeType, rect); |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 325 | } |
| 326 | |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 327 | GrConvexPolyEffect::~GrConvexPolyEffect() {} |
| 328 | |
egdaniel | 1a8ecdf | 2014-10-03 06:24:12 -0700 | [diff] [blame] | 329 | void GrConvexPolyEffect::onComputeInvariantOutput(InvariantOutput* inout) const { |
egdaniel | ccb2e38 | 2014-10-13 12:53:46 -0700 | [diff] [blame] | 330 | inout->mulByUnknownAlpha(); |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 331 | } |
| 332 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 333 | const GrBackendFragmentProcessorFactory& GrConvexPolyEffect::getFactory() const { |
| 334 | return GrTBackendFragmentProcessorFactory<GrConvexPolyEffect>::getInstance(); |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 335 | } |
| 336 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 337 | GrConvexPolyEffect::GrConvexPolyEffect(GrPrimitiveEdgeType edgeType, int n, const SkScalar edges[]) |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 338 | : fEdgeType(edgeType) |
| 339 | , fEdgeCount(n) { |
| 340 | // Factory function should have already ensured this. |
| 341 | SkASSERT(n <= kMaxEdges); |
| 342 | memcpy(fEdges, edges, 3 * n * sizeof(SkScalar)); |
| 343 | // Outset the edges by 0.5 so that a pixel with center on an edge is 50% covered in the AA case |
| 344 | // and 100% covered in the non-AA case. |
| 345 | for (int i = 0; i < n; ++i) { |
| 346 | fEdges[3 * i + 2] += SK_ScalarHalf; |
| 347 | } |
| 348 | this->setWillReadFragmentPosition(); |
| 349 | } |
| 350 | |
bsalomon | 0e08fc1 | 2014-10-15 08:19:04 -0700 | [diff] [blame^] | 351 | bool GrConvexPolyEffect::onIsEqual(const GrFragmentProcessor& other) const { |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame] | 352 | const GrConvexPolyEffect& cpe = other.cast<GrConvexPolyEffect>(); |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 353 | // ignore the fact that 0 == -0 and just use memcmp. |
| 354 | return (cpe.fEdgeType == fEdgeType && cpe.fEdgeCount == fEdgeCount && |
| 355 | 0 == memcmp(cpe.fEdges, fEdges, 3 * fEdgeCount * sizeof(SkScalar))); |
| 356 | } |
| 357 | |
| 358 | ////////////////////////////////////////////////////////////////////////////// |
| 359 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 360 | GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrConvexPolyEffect); |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 361 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 362 | GrFragmentProcessor* GrConvexPolyEffect::TestCreate(SkRandom* random, |
| 363 | GrContext*, |
| 364 | const GrDrawTargetCaps& caps, |
| 365 | GrTexture*[]) { |
commit-bot@chromium.org | 65ee5f4 | 2014-02-04 17:49:48 +0000 | [diff] [blame] | 366 | int count = random->nextULessThan(kMaxEdges) + 1; |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 367 | SkScalar edges[kMaxEdges * 3]; |
| 368 | for (int i = 0; i < 3 * count; ++i) { |
| 369 | edges[i] = random->nextSScalar1(); |
| 370 | } |
| 371 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 372 | GrFragmentProcessor* fp; |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 373 | do { |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 374 | GrPrimitiveEdgeType edgeType = static_cast<GrPrimitiveEdgeType>( |
| 375 | random->nextULessThan(kGrProcessorEdgeTypeCnt)); |
| 376 | fp = GrConvexPolyEffect::Create(edgeType, count, edges); |
| 377 | } while (NULL == fp); |
| 378 | return fp; |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 379 | } |