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 | |
| 11 | #include "gl/GrGLEffect.h" |
| 12 | #include "gl/GrGLSL.h" |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 13 | #include "GrTBackendEffectFactory.h" |
| 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 | |
| 20 | class AARectEffect : public GrEffect { |
| 21 | public: |
| 22 | typedef GLAARectEffect GLEffect; |
| 23 | |
| 24 | const SkRect& getRect() const { return fRect; } |
| 25 | |
| 26 | static const char* Name() { return "AARect"; } |
| 27 | |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 28 | static GrEffect* Create(GrEffectEdgeType 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 | |
| 32 | virtual void getConstantColorComponents(GrColor* color, |
| 33 | uint32_t* validFlags) const SK_OVERRIDE { |
| 34 | if (fRect.isEmpty()) { |
| 35 | // An empty rect will have no coverage anywhere. |
| 36 | *color = 0x00000000; |
| 37 | *validFlags = kRGBA_GrColorComponentFlags; |
| 38 | } else { |
| 39 | *validFlags = 0; |
| 40 | } |
| 41 | } |
| 42 | |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 43 | GrEffectEdgeType getEdgeType() const { return fEdgeType; } |
commit-bot@chromium.org | d85f32c | 2014-02-28 14:43:26 +0000 | [diff] [blame] | 44 | |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 45 | virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; |
| 46 | |
| 47 | private: |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 48 | AARectEffect(GrEffectEdgeType edgeType, const SkRect& rect) : fRect(rect), fEdgeType(edgeType) { |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 49 | this->setWillReadFragmentPosition(); |
| 50 | } |
| 51 | |
| 52 | virtual bool onIsEqual(const GrEffect& other) const SK_OVERRIDE { |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 53 | const AARectEffect& aare = other.cast<AARectEffect>(); |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 54 | return fRect == aare.fRect; |
| 55 | } |
| 56 | |
| 57 | SkRect fRect; |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 58 | GrEffectEdgeType fEdgeType; |
commit-bot@chromium.org | d85f32c | 2014-02-28 14:43:26 +0000 | [diff] [blame] | 59 | |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 60 | typedef GrEffect INHERITED; |
| 61 | |
| 62 | GR_DECLARE_EFFECT_TEST; |
| 63 | |
| 64 | }; |
| 65 | |
| 66 | GR_DEFINE_EFFECT_TEST(AARectEffect); |
| 67 | |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 68 | GrEffect* AARectEffect::TestCreate(SkRandom* random, |
| 69 | GrContext*, |
| 70 | const GrDrawTargetCaps& caps, |
| 71 | GrTexture*[]) { |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 72 | SkRect rect = SkRect::MakeLTRB(random->nextSScalar1(), |
| 73 | random->nextSScalar1(), |
| 74 | random->nextSScalar1(), |
| 75 | random->nextSScalar1()); |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 76 | GrEffect* effect; |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 77 | do { |
| 78 | GrEffectEdgeType edgeType = static_cast<GrEffectEdgeType>(random->nextULessThan( |
| 79 | kGrEffectEdgeTypeCnt)); |
| 80 | |
| 81 | effect = AARectEffect::Create(edgeType, rect); |
| 82 | } while (NULL == effect); |
| 83 | return effect; |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 84 | } |
| 85 | |
| 86 | ////////////////////////////////////////////////////////////////////////////// |
| 87 | |
| 88 | class GLAARectEffect : public GrGLEffect { |
| 89 | public: |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 90 | GLAARectEffect(const GrBackendEffectFactory&, const GrEffect&); |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 91 | |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 92 | virtual void emitCode(GrGLProgramBuilder* builder, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 93 | const GrEffect& effect, |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 94 | const GrEffectKey& key, |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 95 | const char* outputColor, |
| 96 | const char* inputColor, |
| 97 | const TransformedCoordsArray&, |
| 98 | const TextureSamplerArray&) SK_OVERRIDE; |
| 99 | |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 100 | static inline void GenKey(const GrEffect&, const GrGLCaps&, GrEffectKeyBuilder*); |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 101 | |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 102 | virtual void setData(const GrGLProgramDataManager&, const GrEffect&) SK_OVERRIDE; |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 103 | |
| 104 | private: |
kkinnunen | 7510b22 | 2014-07-30 00:04:16 -0700 | [diff] [blame] | 105 | GrGLProgramDataManager::UniformHandle fRectUniform; |
| 106 | SkRect fPrevRect; |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 107 | typedef GrGLEffect INHERITED; |
| 108 | }; |
| 109 | |
| 110 | GLAARectEffect::GLAARectEffect(const GrBackendEffectFactory& factory, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 111 | const GrEffect& effect) |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 112 | : INHERITED (factory) { |
| 113 | fPrevRect.fLeft = SK_ScalarNaN; |
| 114 | } |
| 115 | |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 116 | void GLAARectEffect::emitCode(GrGLProgramBuilder* builder, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 117 | const GrEffect& effect, |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 118 | const GrEffectKey& key, |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 119 | const char* outputColor, |
| 120 | const char* inputColor, |
| 121 | const TransformedCoordsArray&, |
| 122 | const TextureSamplerArray& samplers) { |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 123 | const AARectEffect& aare = effect.cast<AARectEffect>(); |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 124 | const char *rectName; |
commit-bot@chromium.org | d85f32c | 2014-02-28 14:43:26 +0000 | [diff] [blame] | 125 | // The rect uniform's xyzw refer to (left + 0.5, top + 0.5, right - 0.5, bottom - 0.5), |
| 126 | // respectively. |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 127 | fRectUniform = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility, |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 128 | kVec4f_GrSLType, |
| 129 | "rect", |
| 130 | &rectName); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 131 | |
| 132 | GrGLFragmentShaderBuilder* fsBuilder = builder->getFragmentShaderBuilder(); |
| 133 | const char* fragmentPos = fsBuilder->fragmentPosition(); |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 134 | if (GrEffectEdgeTypeIsAA(aare.getEdgeType())) { |
commit-bot@chromium.org | d85f32c | 2014-02-28 14:43:26 +0000 | [diff] [blame] | 135 | // The amount of coverage removed in x and y by the edges is computed as a pair of negative |
| 136 | // numbers, xSub and ySub. |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 137 | fsBuilder->codeAppend("\t\tfloat xSub, ySub;\n"); |
| 138 | fsBuilder->codeAppendf("\t\txSub = min(%s.x - %s.x, 0.0);\n", fragmentPos, rectName); |
| 139 | fsBuilder->codeAppendf("\t\txSub += min(%s.z - %s.x, 0.0);\n", rectName, fragmentPos); |
| 140 | fsBuilder->codeAppendf("\t\tySub = min(%s.y - %s.y, 0.0);\n", fragmentPos, rectName); |
| 141 | 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] | 142 | // Now compute coverage in x and y and multiply them to get the fraction of the pixel |
| 143 | // covered. |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 144 | 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] | 145 | } else { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 146 | fsBuilder->codeAppendf("\t\tfloat alpha = 1.0;\n"); |
| 147 | fsBuilder->codeAppendf("\t\talpha *= (%s.x - %s.x) > -0.5 ? 1.0 : 0.0;\n", fragmentPos, rectName); |
| 148 | fsBuilder->codeAppendf("\t\talpha *= (%s.z - %s.x) > -0.5 ? 1.0 : 0.0;\n", rectName, fragmentPos); |
| 149 | fsBuilder->codeAppendf("\t\talpha *= (%s.y - %s.y) > -0.5 ? 1.0 : 0.0;\n", fragmentPos, rectName); |
| 150 | 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] | 151 | } |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 152 | |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 153 | if (GrEffectEdgeTypeIsInverseFill(aare.getEdgeType())) { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 154 | fsBuilder->codeAppend("\t\talpha = 1.0 - alpha;\n"); |
commit-bot@chromium.org | d85f32c | 2014-02-28 14:43:26 +0000 | [diff] [blame] | 155 | } |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 156 | fsBuilder->codeAppendf("\t\t%s = %s;\n", outputColor, |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 157 | (GrGLSLExpr4(inputColor) * GrGLSLExpr1("alpha")).c_str()); |
| 158 | } |
| 159 | |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 160 | void GLAARectEffect::setData(const GrGLProgramDataManager& pdman, const GrEffect& effect) { |
| 161 | const AARectEffect& aare = effect.cast<AARectEffect>(); |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 162 | const SkRect& rect = aare.getRect(); |
| 163 | if (rect != fPrevRect) { |
kkinnunen | 7510b22 | 2014-07-30 00:04:16 -0700 | [diff] [blame] | 164 | 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] | 165 | rect.fRight - 0.5f, rect.fBottom - 0.5f); |
| 166 | fPrevRect = rect; |
| 167 | } |
| 168 | } |
| 169 | |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 170 | void GLAARectEffect::GenKey(const GrEffect& effect, const GrGLCaps&, |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 171 | GrEffectKeyBuilder* b) { |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 172 | const AARectEffect& aare = effect.cast<AARectEffect>(); |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 173 | b->add32(aare.getEdgeType()); |
commit-bot@chromium.org | d85f32c | 2014-02-28 14:43:26 +0000 | [diff] [blame] | 174 | } |
| 175 | |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 176 | const GrBackendEffectFactory& AARectEffect::getFactory() const { |
| 177 | return GrTBackendEffectFactory<AARectEffect>::getInstance(); |
| 178 | } |
| 179 | |
| 180 | ////////////////////////////////////////////////////////////////////////////// |
| 181 | |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 182 | class GrGLConvexPolyEffect : public GrGLEffect { |
| 183 | public: |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 184 | GrGLConvexPolyEffect(const GrBackendEffectFactory&, const GrEffect&); |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 185 | |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 186 | virtual void emitCode(GrGLProgramBuilder* builder, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 187 | const GrEffect& effect, |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 188 | const GrEffectKey& key, |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 189 | const char* outputColor, |
| 190 | const char* inputColor, |
| 191 | const TransformedCoordsArray&, |
| 192 | const TextureSamplerArray&) SK_OVERRIDE; |
| 193 | |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 194 | static inline void GenKey(const GrEffect&, const GrGLCaps&, GrEffectKeyBuilder*); |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 195 | |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 196 | virtual void setData(const GrGLProgramDataManager&, const GrEffect&) SK_OVERRIDE; |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 197 | |
| 198 | private: |
kkinnunen | 7510b22 | 2014-07-30 00:04:16 -0700 | [diff] [blame] | 199 | GrGLProgramDataManager::UniformHandle fEdgeUniform; |
| 200 | SkScalar fPrevEdges[3 * GrConvexPolyEffect::kMaxEdges]; |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 201 | typedef GrGLEffect INHERITED; |
| 202 | }; |
| 203 | |
| 204 | GrGLConvexPolyEffect::GrGLConvexPolyEffect(const GrBackendEffectFactory& factory, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 205 | const GrEffect& effect) |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 206 | : INHERITED (factory) { |
| 207 | fPrevEdges[0] = SK_ScalarNaN; |
| 208 | } |
| 209 | |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 210 | void GrGLConvexPolyEffect::emitCode(GrGLProgramBuilder* builder, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 211 | const GrEffect& effect, |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 212 | const GrEffectKey& key, |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 213 | const char* outputColor, |
| 214 | const char* inputColor, |
| 215 | const TransformedCoordsArray&, |
| 216 | const TextureSamplerArray& samplers) { |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 217 | const GrConvexPolyEffect& cpe = effect.cast<GrConvexPolyEffect>(); |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 218 | |
| 219 | const char *edgeArrayName; |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 220 | fEdgeUniform = builder->addUniformArray(GrGLProgramBuilder::kFragment_Visibility, |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 221 | kVec3f_GrSLType, |
| 222 | "edges", |
| 223 | cpe.getEdgeCount(), |
| 224 | &edgeArrayName); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 225 | GrGLFragmentShaderBuilder* fsBuilder = builder->getFragmentShaderBuilder(); |
| 226 | fsBuilder->codeAppend("\t\tfloat alpha = 1.0;\n"); |
| 227 | fsBuilder->codeAppend("\t\tfloat edge;\n"); |
| 228 | const char* fragmentPos = fsBuilder->fragmentPosition(); |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 229 | for (int i = 0; i < cpe.getEdgeCount(); ++i) { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 230 | 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] | 231 | edgeArrayName, i, fragmentPos, fragmentPos); |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 232 | if (GrEffectEdgeTypeIsAA(cpe.getEdgeType())) { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 233 | 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] | 234 | } else { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 235 | 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] | 236 | } |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 237 | fsBuilder->codeAppend("\t\talpha *= edge;\n"); |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 238 | } |
| 239 | |
commit-bot@chromium.org | 6dee875 | 2014-02-07 22:39:01 +0000 | [diff] [blame] | 240 | // Woe is me. See skbug.com/2149. |
| 241 | if (kTegra2_GrGLRenderer == builder->ctxInfo().renderer()) { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 242 | 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] | 243 | } |
commit-bot@chromium.org | d85f32c | 2014-02-28 14:43:26 +0000 | [diff] [blame] | 244 | |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 245 | if (GrEffectEdgeTypeIsInverseFill(cpe.getEdgeType())) { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 246 | fsBuilder->codeAppend("\talpha = 1.0 - alpha;\n"); |
commit-bot@chromium.org | d85f32c | 2014-02-28 14:43:26 +0000 | [diff] [blame] | 247 | } |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 248 | fsBuilder->codeAppendf("\t%s = %s;\n", outputColor, |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 249 | (GrGLSLExpr4(inputColor) * GrGLSLExpr1("alpha")).c_str()); |
| 250 | } |
| 251 | |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 252 | void GrGLConvexPolyEffect::setData(const GrGLProgramDataManager& pdman, const GrEffect& effect) { |
| 253 | const GrConvexPolyEffect& cpe = effect.cast<GrConvexPolyEffect>(); |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 254 | size_t byteSize = 3 * cpe.getEdgeCount() * sizeof(SkScalar); |
| 255 | if (0 != memcmp(fPrevEdges, cpe.getEdges(), byteSize)) { |
kkinnunen | 7510b22 | 2014-07-30 00:04:16 -0700 | [diff] [blame] | 256 | pdman.set3fv(fEdgeUniform, cpe.getEdgeCount(), cpe.getEdges()); |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 257 | memcpy(fPrevEdges, cpe.getEdges(), byteSize); |
| 258 | } |
| 259 | } |
| 260 | |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 261 | void GrGLConvexPolyEffect::GenKey(const GrEffect& effect, const GrGLCaps&, |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 262 | GrEffectKeyBuilder* b) { |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 263 | const GrConvexPolyEffect& cpe = effect.cast<GrConvexPolyEffect>(); |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 264 | GR_STATIC_ASSERT(kGrEffectEdgeTypeCnt <= 8); |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 265 | uint32_t key = (cpe.getEdgeCount() << 3) | cpe.getEdgeType(); |
| 266 | b->add32(key); |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 267 | } |
| 268 | |
| 269 | ////////////////////////////////////////////////////////////////////////////// |
| 270 | |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 271 | GrEffect* GrConvexPolyEffect::Create(GrEffectEdgeType type, const SkPath& path, |
| 272 | const SkVector* offset) { |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 273 | if (kHairlineAA_GrEffectEdgeType == type) { |
| 274 | return NULL; |
| 275 | } |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 276 | if (path.getSegmentMasks() != SkPath::kLine_SegmentMask || |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 277 | !path.isConvex()) { |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 278 | return NULL; |
| 279 | } |
| 280 | |
| 281 | if (path.countPoints() > kMaxEdges) { |
| 282 | return NULL; |
| 283 | } |
| 284 | |
| 285 | SkPoint pts[kMaxEdges]; |
| 286 | SkScalar edges[3 * kMaxEdges]; |
| 287 | |
| 288 | SkPath::Direction dir; |
| 289 | SkAssertResult(path.cheapComputeDirection(&dir)); |
| 290 | |
commit-bot@chromium.org | b21fac1 | 2014-02-07 21:13:11 +0000 | [diff] [blame] | 291 | SkVector t; |
| 292 | if (NULL == offset) { |
| 293 | t.set(0, 0); |
| 294 | } else { |
| 295 | t = *offset; |
| 296 | } |
| 297 | |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 298 | int count = path.getPoints(pts, kMaxEdges); |
| 299 | int n = 0; |
| 300 | for (int lastPt = count - 1, i = 0; i < count; lastPt = i++) { |
| 301 | if (pts[lastPt] != pts[i]) { |
| 302 | SkVector v = pts[i] - pts[lastPt]; |
| 303 | v.normalize(); |
| 304 | if (SkPath::kCCW_Direction == dir) { |
| 305 | edges[3 * n] = v.fY; |
| 306 | edges[3 * n + 1] = -v.fX; |
| 307 | } else { |
| 308 | edges[3 * n] = -v.fY; |
| 309 | edges[3 * n + 1] = v.fX; |
| 310 | } |
commit-bot@chromium.org | b21fac1 | 2014-02-07 21:13:11 +0000 | [diff] [blame] | 311 | SkPoint p = pts[i] + t; |
| 312 | 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] | 313 | ++n; |
| 314 | } |
| 315 | } |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 316 | if (path.isInverseFillType()) { |
| 317 | type = GrInvertEffectEdgeType(type); |
| 318 | } |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 319 | return Create(type, n, edges); |
| 320 | } |
| 321 | |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 322 | GrEffect* GrConvexPolyEffect::Create(GrEffectEdgeType edgeType, const SkRect& rect) { |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 323 | if (kHairlineAA_GrEffectEdgeType == edgeType){ |
| 324 | return NULL; |
| 325 | } |
commit-bot@chromium.org | d85f32c | 2014-02-28 14:43:26 +0000 | [diff] [blame] | 326 | return AARectEffect::Create(edgeType, rect); |
commit-bot@chromium.org | f053980 | 2014-02-08 19:31:05 +0000 | [diff] [blame] | 327 | } |
| 328 | |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 329 | GrConvexPolyEffect::~GrConvexPolyEffect() {} |
| 330 | |
| 331 | void GrConvexPolyEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const { |
| 332 | *validFlags = 0; |
| 333 | } |
| 334 | |
| 335 | const GrBackendEffectFactory& GrConvexPolyEffect::getFactory() const { |
| 336 | return GrTBackendEffectFactory<GrConvexPolyEffect>::getInstance(); |
| 337 | } |
| 338 | |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 339 | GrConvexPolyEffect::GrConvexPolyEffect(GrEffectEdgeType edgeType, int n, const SkScalar edges[]) |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 340 | : fEdgeType(edgeType) |
| 341 | , fEdgeCount(n) { |
| 342 | // Factory function should have already ensured this. |
| 343 | SkASSERT(n <= kMaxEdges); |
| 344 | memcpy(fEdges, edges, 3 * n * sizeof(SkScalar)); |
| 345 | // Outset the edges by 0.5 so that a pixel with center on an edge is 50% covered in the AA case |
| 346 | // and 100% covered in the non-AA case. |
| 347 | for (int i = 0; i < n; ++i) { |
| 348 | fEdges[3 * i + 2] += SK_ScalarHalf; |
| 349 | } |
| 350 | this->setWillReadFragmentPosition(); |
| 351 | } |
| 352 | |
| 353 | bool GrConvexPolyEffect::onIsEqual(const GrEffect& other) const { |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 354 | const GrConvexPolyEffect& cpe = other.cast<GrConvexPolyEffect>(); |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 355 | // ignore the fact that 0 == -0 and just use memcmp. |
| 356 | return (cpe.fEdgeType == fEdgeType && cpe.fEdgeCount == fEdgeCount && |
| 357 | 0 == memcmp(cpe.fEdges, fEdges, 3 * fEdgeCount * sizeof(SkScalar))); |
| 358 | } |
| 359 | |
| 360 | ////////////////////////////////////////////////////////////////////////////// |
| 361 | |
| 362 | GR_DEFINE_EFFECT_TEST(GrConvexPolyEffect); |
| 363 | |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 364 | GrEffect* GrConvexPolyEffect::TestCreate(SkRandom* random, |
| 365 | GrContext*, |
| 366 | const GrDrawTargetCaps& caps, |
| 367 | GrTexture*[]) { |
commit-bot@chromium.org | 65ee5f4 | 2014-02-04 17:49:48 +0000 | [diff] [blame] | 368 | int count = random->nextULessThan(kMaxEdges) + 1; |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 369 | SkScalar edges[kMaxEdges * 3]; |
| 370 | for (int i = 0; i < 3 * count; ++i) { |
| 371 | edges[i] = random->nextSScalar1(); |
| 372 | } |
| 373 | |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 374 | GrEffect* effect; |
commit-bot@chromium.org | cabf4b2 | 2014-03-05 18:27:43 +0000 | [diff] [blame] | 375 | do { |
| 376 | GrEffectEdgeType edgeType = static_cast<GrEffectEdgeType>( |
| 377 | random->nextULessThan(kGrEffectEdgeTypeCnt)); |
| 378 | effect = GrConvexPolyEffect::Create(edgeType, count, edges); |
| 379 | } while (NULL == effect); |
| 380 | return effect; |
commit-bot@chromium.org | c3fe549 | 2014-01-30 18:15:51 +0000 | [diff] [blame] | 381 | } |