commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1 | |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Copyright 2014 Google Inc. |
| 4 | * |
| 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
| 7 | */ |
commit-bot@chromium.org | 2af1a2d | 2014-04-04 13:50:50 +0000 | [diff] [blame] | 8 | |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 9 | #include "SkTwoPointConicalGradient_gpu.h" |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 10 | |
| 11 | #include "SkTwoPointConicalGradient.h" |
| 12 | |
commit-bot@chromium.org | ef93d29 | 2014-04-10 15:37:52 +0000 | [diff] [blame] | 13 | #if SK_SUPPORT_GPU |
commit-bot@chromium.org | 7f43493 | 2014-04-10 16:03:06 +0000 | [diff] [blame] | 14 | #include "GrTBackendEffectFactory.h" |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 15 | #include "gl/builders/GrGLProgramBuilder.h" |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 16 | // For brevity |
kkinnunen | 7510b22 | 2014-07-30 00:04:16 -0700 | [diff] [blame] | 17 | typedef GrGLProgramDataManager::UniformHandle UniformHandle; |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 18 | |
commit-bot@chromium.org | 8089467 | 2014-04-22 21:24:22 +0000 | [diff] [blame] | 19 | static const SkScalar kErrorTol = 0.00001f; |
egdaniel | 8405ef9 | 2014-06-09 11:57:28 -0700 | [diff] [blame] | 20 | static const SkScalar kEdgeErrorTol = 5.f * kErrorTol; |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 21 | |
| 22 | /** |
| 23 | * We have three general cases for 2pt conical gradients. First we always assume that |
| 24 | * the start radius <= end radius. Our first case (kInside_) is when the start circle |
| 25 | * is completely enclosed by the end circle. The second case (kOutside_) is the case |
| 26 | * when the start circle is either completely outside the end circle or the circles |
| 27 | * overlap. The final case (kEdge_) is when the start circle is inside the end one, |
| 28 | * but the two are just barely touching at 1 point along their edges. |
| 29 | */ |
| 30 | enum ConicalType { |
| 31 | kInside_ConicalType, |
| 32 | kOutside_ConicalType, |
| 33 | kEdge_ConicalType, |
| 34 | }; |
| 35 | |
commit-bot@chromium.org | 2af1a2d | 2014-04-04 13:50:50 +0000 | [diff] [blame] | 36 | ////////////////////////////////////////////////////////////////////////////// |
| 37 | |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 38 | static void set_matrix_edge_conical(const SkTwoPointConicalGradient& shader, |
| 39 | SkMatrix* invLMatrix) { |
commit-bot@chromium.org | 2af1a2d | 2014-04-04 13:50:50 +0000 | [diff] [blame] | 40 | // Inverse of the current local matrix is passed in then, |
| 41 | // translate to center1, rotate so center2 is on x axis. |
| 42 | const SkPoint& center1 = shader.getStartCenter(); |
| 43 | const SkPoint& center2 = shader.getEndCenter(); |
| 44 | |
| 45 | invLMatrix->postTranslate(-center1.fX, -center1.fY); |
| 46 | |
| 47 | SkPoint diff = center2 - center1; |
| 48 | SkScalar diffLen = diff.length(); |
| 49 | if (0 != diffLen) { |
| 50 | SkScalar invDiffLen = SkScalarInvert(diffLen); |
| 51 | SkMatrix rot; |
| 52 | rot.setSinCos(-SkScalarMul(invDiffLen, diff.fY), |
| 53 | SkScalarMul(invDiffLen, diff.fX)); |
| 54 | invLMatrix->postConcat(rot); |
| 55 | } |
| 56 | } |
| 57 | |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 58 | class GLEdge2PtConicalEffect; |
commit-bot@chromium.org | 2af1a2d | 2014-04-04 13:50:50 +0000 | [diff] [blame] | 59 | |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 60 | class Edge2PtConicalEffect : public GrGradientEffect { |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 61 | public: |
| 62 | |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 63 | static GrEffect* Create(GrContext* ctx, |
| 64 | const SkTwoPointConicalGradient& shader, |
| 65 | const SkMatrix& matrix, |
| 66 | SkShader::TileMode tm) { |
bsalomon | 55fad7a | 2014-07-08 07:34:20 -0700 | [diff] [blame] | 67 | return SkNEW_ARGS(Edge2PtConicalEffect, (ctx, shader, matrix, tm)); |
commit-bot@chromium.org | 2af1a2d | 2014-04-04 13:50:50 +0000 | [diff] [blame] | 68 | } |
| 69 | |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 70 | virtual ~Edge2PtConicalEffect() {} |
commit-bot@chromium.org | 2af1a2d | 2014-04-04 13:50:50 +0000 | [diff] [blame] | 71 | |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 72 | static const char* Name() { return "Two-Point Conical Gradient Edge Touching"; } |
commit-bot@chromium.org | 2af1a2d | 2014-04-04 13:50:50 +0000 | [diff] [blame] | 73 | virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; |
| 74 | |
| 75 | // The radial gradient parameters can collapse to a linear (instead of quadratic) equation. |
commit-bot@chromium.org | 2af1a2d | 2014-04-04 13:50:50 +0000 | [diff] [blame] | 76 | SkScalar center() const { return fCenterX1; } |
| 77 | SkScalar diffRadius() const { return fDiffRadius; } |
| 78 | SkScalar radius() const { return fRadius0; } |
| 79 | |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 80 | typedef GLEdge2PtConicalEffect GLEffect; |
commit-bot@chromium.org | 2af1a2d | 2014-04-04 13:50:50 +0000 | [diff] [blame] | 81 | |
| 82 | private: |
| 83 | virtual bool onIsEqual(const GrEffect& sBase) const SK_OVERRIDE { |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 84 | const Edge2PtConicalEffect& s = sBase.cast<Edge2PtConicalEffect>(); |
commit-bot@chromium.org | 2af1a2d | 2014-04-04 13:50:50 +0000 | [diff] [blame] | 85 | return (INHERITED::onIsEqual(sBase) && |
| 86 | this->fCenterX1 == s.fCenterX1 && |
| 87 | this->fRadius0 == s.fRadius0 && |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 88 | this->fDiffRadius == s.fDiffRadius); |
commit-bot@chromium.org | 2af1a2d | 2014-04-04 13:50:50 +0000 | [diff] [blame] | 89 | } |
| 90 | |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 91 | Edge2PtConicalEffect(GrContext* ctx, |
| 92 | const SkTwoPointConicalGradient& shader, |
| 93 | const SkMatrix& matrix, |
| 94 | SkShader::TileMode tm) |
commit-bot@chromium.org | 2af1a2d | 2014-04-04 13:50:50 +0000 | [diff] [blame] | 95 | : INHERITED(ctx, shader, matrix, tm), |
| 96 | fCenterX1(shader.getCenterX1()), |
| 97 | fRadius0(shader.getStartRadius()), |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 98 | fDiffRadius(shader.getDiffRadius()){ |
| 99 | // We should only be calling this shader if we are degenerate case with touching circles |
egdaniel | 8405ef9 | 2014-06-09 11:57:28 -0700 | [diff] [blame] | 100 | // When deciding if we are in edge case, we scaled by the end radius for cases when the |
| 101 | // start radius was close to zero, otherwise we scaled by the start radius |
| 102 | SkASSERT(SkScalarAbs(SkScalarAbs(fDiffRadius) - SkScalarAbs(fCenterX1)) < |
| 103 | kEdgeErrorTol * (fRadius0 < kErrorTol ? shader.getEndRadius() : fRadius0)); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 104 | |
commit-bot@chromium.org | 2af1a2d | 2014-04-04 13:50:50 +0000 | [diff] [blame] | 105 | // We pass the linear part of the quadratic as a varying. |
| 106 | // float b = -2.0 * (fCenterX1 * x + fRadius0 * fDiffRadius * z) |
| 107 | fBTransform = this->getCoordTransform(); |
| 108 | SkMatrix& bMatrix = *fBTransform.accessMatrix(); |
| 109 | SkScalar r0dr = SkScalarMul(fRadius0, fDiffRadius); |
| 110 | bMatrix[SkMatrix::kMScaleX] = -2 * (SkScalarMul(fCenterX1, bMatrix[SkMatrix::kMScaleX]) + |
| 111 | SkScalarMul(r0dr, bMatrix[SkMatrix::kMPersp0])); |
| 112 | bMatrix[SkMatrix::kMSkewX] = -2 * (SkScalarMul(fCenterX1, bMatrix[SkMatrix::kMSkewX]) + |
| 113 | SkScalarMul(r0dr, bMatrix[SkMatrix::kMPersp1])); |
| 114 | bMatrix[SkMatrix::kMTransX] = -2 * (SkScalarMul(fCenterX1, bMatrix[SkMatrix::kMTransX]) + |
| 115 | SkScalarMul(r0dr, bMatrix[SkMatrix::kMPersp2])); |
| 116 | this->addCoordTransform(&fBTransform); |
| 117 | } |
| 118 | |
| 119 | GR_DECLARE_EFFECT_TEST; |
| 120 | |
| 121 | // @{ |
| 122 | // Cache of values - these can change arbitrarily, EXCEPT |
| 123 | // we shouldn't change between degenerate and non-degenerate?! |
| 124 | |
| 125 | GrCoordTransform fBTransform; |
| 126 | SkScalar fCenterX1; |
| 127 | SkScalar fRadius0; |
| 128 | SkScalar fDiffRadius; |
| 129 | |
| 130 | // @} |
| 131 | |
| 132 | typedef GrGradientEffect INHERITED; |
| 133 | }; |
| 134 | |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 135 | class GLEdge2PtConicalEffect : public GrGLGradientEffect { |
commit-bot@chromium.org | 2af1a2d | 2014-04-04 13:50:50 +0000 | [diff] [blame] | 136 | public: |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 137 | GLEdge2PtConicalEffect(const GrBackendEffectFactory& factory, const GrEffect&); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 138 | virtual ~GLEdge2PtConicalEffect() { } |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 139 | |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 140 | virtual void emitCode(GrGLProgramBuilder*, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 141 | const GrEffect&, |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 142 | const GrEffectKey&, |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 143 | const char* outputColor, |
| 144 | const char* inputColor, |
| 145 | const TransformedCoordsArray&, |
| 146 | const TextureSamplerArray&) SK_OVERRIDE; |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 147 | virtual void setData(const GrGLProgramDataManager&, const GrEffect&) SK_OVERRIDE; |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 148 | |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 149 | static void GenKey(const GrEffect&, const GrGLCaps& caps, GrEffectKeyBuilder* b); |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 150 | |
| 151 | protected: |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 152 | UniformHandle fParamUni; |
| 153 | |
| 154 | const char* fVSVaryingName; |
| 155 | const char* fFSVaryingName; |
| 156 | |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 157 | // @{ |
| 158 | /// Values last uploaded as uniforms |
| 159 | |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 160 | SkScalar fCachedRadius; |
| 161 | SkScalar fCachedDiffRadius; |
| 162 | |
| 163 | // @} |
| 164 | |
| 165 | private: |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 166 | typedef GrGLGradientEffect INHERITED; |
| 167 | |
| 168 | }; |
| 169 | |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 170 | const GrBackendEffectFactory& Edge2PtConicalEffect::getFactory() const { |
| 171 | return GrTBackendEffectFactory<Edge2PtConicalEffect>::getInstance(); |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 172 | } |
skia.committer@gmail.com | 221b911 | 2014-04-04 03:04:32 +0000 | [diff] [blame] | 173 | |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 174 | GR_DEFINE_EFFECT_TEST(Edge2PtConicalEffect); |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 175 | |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 176 | GrEffect* Edge2PtConicalEffect::TestCreate(SkRandom* random, |
| 177 | GrContext* context, |
| 178 | const GrDrawTargetCaps&, |
| 179 | GrTexture**) { |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 180 | SkPoint center1 = {random->nextUScalar1(), random->nextUScalar1()}; |
| 181 | SkScalar radius1 = random->nextUScalar1(); |
| 182 | SkPoint center2; |
| 183 | SkScalar radius2; |
| 184 | do { |
| 185 | center2.set(random->nextUScalar1(), random->nextUScalar1()); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 186 | // If the circles are identical the factory will give us an empty shader. |
| 187 | // This will happen if we pick identical centers |
| 188 | } while (center1 == center2); |
| 189 | |
| 190 | // Below makes sure that circle one is contained within circle two |
| 191 | // and both circles are touching on an edge |
| 192 | SkPoint diff = center2 - center1; |
| 193 | SkScalar diffLen = diff.length(); |
| 194 | radius2 = radius1 + diffLen; |
| 195 | |
| 196 | SkColor colors[kMaxRandomGradientColors]; |
| 197 | SkScalar stopsArray[kMaxRandomGradientColors]; |
| 198 | SkScalar* stops = stopsArray; |
| 199 | SkShader::TileMode tm; |
| 200 | int colorCount = RandomGradientParams(random, colors, &stops, &tm); |
| 201 | SkAutoTUnref<SkShader> shader(SkGradientShader::CreateTwoPointConical(center1, radius1, |
| 202 | center2, radius2, |
| 203 | colors, stops, colorCount, |
| 204 | tm)); |
| 205 | SkPaint paint; |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 206 | GrEffect* effect; |
| 207 | GrColor paintColor; |
| 208 | SkAssertResult(shader->asNewEffect(context, paint, NULL, &paintColor, &effect)); |
dandov | 9de5b51 | 2014-06-10 14:38:28 -0700 | [diff] [blame] | 209 | return effect; |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 210 | } |
| 211 | |
| 212 | GLEdge2PtConicalEffect::GLEdge2PtConicalEffect(const GrBackendEffectFactory& factory, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 213 | const GrEffect& effect) |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 214 | : INHERITED(factory) |
| 215 | , fVSVaryingName(NULL) |
| 216 | , fFSVaryingName(NULL) |
| 217 | , fCachedRadius(-SK_ScalarMax) |
| 218 | , fCachedDiffRadius(-SK_ScalarMax) {} |
| 219 | |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 220 | void GLEdge2PtConicalEffect::emitCode(GrGLProgramBuilder* builder, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 221 | const GrEffect&, |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 222 | const GrEffectKey& key, |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 223 | const char* outputColor, |
| 224 | const char* inputColor, |
| 225 | const TransformedCoordsArray& coords, |
| 226 | const TextureSamplerArray& samplers) { |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 227 | uint32_t baseKey = key.get32(0); |
| 228 | this->emitUniforms(builder, baseKey); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 229 | fParamUni = builder->addUniformArray(GrGLProgramBuilder::kFragment_Visibility, |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 230 | kFloat_GrSLType, "Conical2FSParams", 3); |
| 231 | |
| 232 | SkString cName("c"); |
| 233 | SkString tName("t"); |
| 234 | SkString p0; // start radius |
| 235 | SkString p1; // start radius squared |
| 236 | SkString p2; // difference in radii (r1 - r0) |
| 237 | |
| 238 | builder->getUniformVariable(fParamUni).appendArrayAccess(0, &p0); |
| 239 | builder->getUniformVariable(fParamUni).appendArrayAccess(1, &p1); |
| 240 | builder->getUniformVariable(fParamUni).appendArrayAccess(2, &p2); |
| 241 | |
| 242 | // We interpolate the linear component in coords[1]. |
| 243 | SkASSERT(coords[0].type() == coords[1].type()); |
| 244 | const char* coords2D; |
| 245 | SkString bVar; |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 246 | GrGLFragmentShaderBuilder* fsBuilder = builder->getFragmentShaderBuilder(); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 247 | if (kVec3f_GrSLType == coords[0].type()) { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 248 | fsBuilder->codeAppendf("\tvec3 interpolants = vec3(%s.xy / %s.z, %s.x / %s.z);\n", |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 249 | coords[0].c_str(), coords[0].c_str(), coords[1].c_str(), |
| 250 | coords[1].c_str()); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 251 | coords2D = "interpolants.xy"; |
| 252 | bVar = "interpolants.z"; |
| 253 | } else { |
| 254 | coords2D = coords[0].c_str(); |
| 255 | bVar.printf("%s.x", coords[1].c_str()); |
| 256 | } |
| 257 | |
| 258 | // output will default to transparent black (we simply won't write anything |
| 259 | // else to it if invalid, instead of discarding or returning prematurely) |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 260 | fsBuilder->codeAppendf("\t%s = vec4(0.0,0.0,0.0,0.0);\n", outputColor); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 261 | |
| 262 | // c = (x^2)+(y^2) - params[1] |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 263 | fsBuilder->codeAppendf("\tfloat %s = dot(%s, %s) - %s;\n", |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 264 | cName.c_str(), coords2D, coords2D, p1.c_str()); |
| 265 | |
| 266 | // linear case: t = -c/b |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 267 | fsBuilder->codeAppendf("\tfloat %s = -(%s / %s);\n", tName.c_str(), |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 268 | cName.c_str(), bVar.c_str()); |
| 269 | |
| 270 | // if r(t) > 0, then t will be the x coordinate |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 271 | fsBuilder->codeAppendf("\tif (%s * %s + %s > 0.0) {\n", tName.c_str(), |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 272 | p2.c_str(), p0.c_str()); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 273 | fsBuilder->codeAppend("\t"); |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 274 | this->emitColor(builder, tName.c_str(), baseKey, outputColor, inputColor, samplers); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 275 | fsBuilder->codeAppend("\t}\n"); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 276 | } |
| 277 | |
kkinnunen | 7510b22 | 2014-07-30 00:04:16 -0700 | [diff] [blame] | 278 | void GLEdge2PtConicalEffect::setData(const GrGLProgramDataManager& pdman, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 279 | const GrEffect& effect) { |
| 280 | INHERITED::setData(pdman, effect); |
| 281 | const Edge2PtConicalEffect& data = effect.cast<Edge2PtConicalEffect>(); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 282 | SkScalar radius0 = data.radius(); |
| 283 | SkScalar diffRadius = data.diffRadius(); |
| 284 | |
| 285 | if (fCachedRadius != radius0 || |
| 286 | fCachedDiffRadius != diffRadius) { |
| 287 | |
| 288 | float values[3] = { |
| 289 | SkScalarToFloat(radius0), |
| 290 | SkScalarToFloat(SkScalarMul(radius0, radius0)), |
| 291 | SkScalarToFloat(diffRadius) |
| 292 | }; |
| 293 | |
kkinnunen | 7510b22 | 2014-07-30 00:04:16 -0700 | [diff] [blame] | 294 | pdman.set1fv(fParamUni, 3, values); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 295 | fCachedRadius = radius0; |
| 296 | fCachedDiffRadius = diffRadius; |
| 297 | } |
| 298 | } |
| 299 | |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 300 | void GLEdge2PtConicalEffect::GenKey(const GrEffect& effect, |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 301 | const GrGLCaps&, GrEffectKeyBuilder* b) { |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 302 | b->add32(GenBaseGradientKey(effect)); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 303 | } |
| 304 | |
| 305 | ////////////////////////////////////////////////////////////////////////////// |
| 306 | // Focal Conical Gradients |
| 307 | ////////////////////////////////////////////////////////////////////////////// |
| 308 | |
| 309 | static ConicalType set_matrix_focal_conical(const SkTwoPointConicalGradient& shader, |
| 310 | SkMatrix* invLMatrix, SkScalar* focalX) { |
| 311 | // Inverse of the current local matrix is passed in then, |
| 312 | // translate, scale, and rotate such that endCircle is unit circle on x-axis, |
| 313 | // and focal point is at the origin. |
| 314 | ConicalType conicalType; |
| 315 | const SkPoint& focal = shader.getStartCenter(); |
| 316 | const SkPoint& centerEnd = shader.getEndCenter(); |
| 317 | SkScalar radius = shader.getEndRadius(); |
commit-bot@chromium.org | 8089467 | 2014-04-22 21:24:22 +0000 | [diff] [blame] | 318 | SkScalar invRadius = 1.f / radius; |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 319 | |
| 320 | SkMatrix matrix; |
| 321 | |
| 322 | matrix.setTranslate(-centerEnd.fX, -centerEnd.fY); |
| 323 | matrix.postScale(invRadius, invRadius); |
| 324 | |
| 325 | SkPoint focalTrans; |
| 326 | matrix.mapPoints(&focalTrans, &focal, 1); |
| 327 | *focalX = focalTrans.length(); |
| 328 | |
commit-bot@chromium.org | 8089467 | 2014-04-22 21:24:22 +0000 | [diff] [blame] | 329 | if (0.f != *focalX) { |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 330 | SkScalar invFocalX = SkScalarInvert(*focalX); |
| 331 | SkMatrix rot; |
| 332 | rot.setSinCos(-SkScalarMul(invFocalX, focalTrans.fY), |
| 333 | SkScalarMul(invFocalX, focalTrans.fX)); |
| 334 | matrix.postConcat(rot); |
| 335 | } |
| 336 | |
commit-bot@chromium.org | 8089467 | 2014-04-22 21:24:22 +0000 | [diff] [blame] | 337 | matrix.postTranslate(-(*focalX), 0.f); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 338 | |
| 339 | // If the focal point is touching the edge of the circle it will |
| 340 | // cause a degenerate case that must be handled separately |
egdaniel | 8405ef9 | 2014-06-09 11:57:28 -0700 | [diff] [blame] | 341 | // kEdgeErrorTol = 5 * kErrorTol was picked after manual testing the |
| 342 | // stability trade off versus the linear approx used in the Edge Shader |
| 343 | if (SkScalarAbs(1.f - (*focalX)) < kEdgeErrorTol) { |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 344 | return kEdge_ConicalType; |
| 345 | } |
| 346 | |
| 347 | // Scale factor 1 / (1 - focalX * focalX) |
commit-bot@chromium.org | 8089467 | 2014-04-22 21:24:22 +0000 | [diff] [blame] | 348 | SkScalar oneMinusF2 = 1.f - SkScalarMul(*focalX, *focalX); |
| 349 | SkScalar s = SkScalarDiv(1.f, oneMinusF2); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 350 | |
| 351 | |
commit-bot@chromium.org | 8089467 | 2014-04-22 21:24:22 +0000 | [diff] [blame] | 352 | if (s >= 0.f) { |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 353 | conicalType = kInside_ConicalType; |
| 354 | matrix.postScale(s, s * SkScalarSqrt(oneMinusF2)); |
| 355 | } else { |
| 356 | conicalType = kOutside_ConicalType; |
| 357 | matrix.postScale(s, s); |
| 358 | } |
| 359 | |
| 360 | invLMatrix->postConcat(matrix); |
| 361 | |
| 362 | return conicalType; |
| 363 | } |
| 364 | |
| 365 | ////////////////////////////////////////////////////////////////////////////// |
| 366 | |
| 367 | class GLFocalOutside2PtConicalEffect; |
| 368 | |
| 369 | class FocalOutside2PtConicalEffect : public GrGradientEffect { |
| 370 | public: |
| 371 | |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 372 | static GrEffect* Create(GrContext* ctx, |
| 373 | const SkTwoPointConicalGradient& shader, |
| 374 | const SkMatrix& matrix, |
| 375 | SkShader::TileMode tm, |
| 376 | SkScalar focalX) { |
bsalomon | 55fad7a | 2014-07-08 07:34:20 -0700 | [diff] [blame] | 377 | return SkNEW_ARGS(FocalOutside2PtConicalEffect, (ctx, shader, matrix, tm, focalX)); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 378 | } |
| 379 | |
| 380 | virtual ~FocalOutside2PtConicalEffect() { } |
| 381 | |
| 382 | static const char* Name() { return "Two-Point Conical Gradient Focal Outside"; } |
| 383 | virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; |
| 384 | |
| 385 | bool isFlipped() const { return fIsFlipped; } |
| 386 | SkScalar focal() const { return fFocalX; } |
| 387 | |
| 388 | typedef GLFocalOutside2PtConicalEffect GLEffect; |
| 389 | |
| 390 | private: |
| 391 | virtual bool onIsEqual(const GrEffect& sBase) const SK_OVERRIDE { |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 392 | const FocalOutside2PtConicalEffect& s = sBase.cast<FocalOutside2PtConicalEffect>(); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 393 | return (INHERITED::onIsEqual(sBase) && |
| 394 | this->fFocalX == s.fFocalX && |
| 395 | this->fIsFlipped == s.fIsFlipped); |
| 396 | } |
| 397 | |
| 398 | FocalOutside2PtConicalEffect(GrContext* ctx, |
| 399 | const SkTwoPointConicalGradient& shader, |
| 400 | const SkMatrix& matrix, |
| 401 | SkShader::TileMode tm, |
| 402 | SkScalar focalX) |
| 403 | : INHERITED(ctx, shader, matrix, tm), fFocalX(focalX), fIsFlipped(shader.isFlippedGrad()) {} |
| 404 | |
| 405 | GR_DECLARE_EFFECT_TEST; |
| 406 | |
| 407 | SkScalar fFocalX; |
| 408 | bool fIsFlipped; |
| 409 | |
| 410 | typedef GrGradientEffect INHERITED; |
| 411 | }; |
| 412 | |
| 413 | class GLFocalOutside2PtConicalEffect : public GrGLGradientEffect { |
| 414 | public: |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 415 | GLFocalOutside2PtConicalEffect(const GrBackendEffectFactory& factory, const GrEffect&); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 416 | virtual ~GLFocalOutside2PtConicalEffect() { } |
| 417 | |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 418 | virtual void emitCode(GrGLProgramBuilder*, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 419 | const GrEffect&, |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 420 | const GrEffectKey&, |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 421 | const char* outputColor, |
| 422 | const char* inputColor, |
| 423 | const TransformedCoordsArray&, |
| 424 | const TextureSamplerArray&) SK_OVERRIDE; |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 425 | virtual void setData(const GrGLProgramDataManager&, const GrEffect&) SK_OVERRIDE; |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 426 | |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 427 | static void GenKey(const GrEffect&, const GrGLCaps& caps, GrEffectKeyBuilder* b); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 428 | |
| 429 | protected: |
| 430 | UniformHandle fParamUni; |
| 431 | |
| 432 | const char* fVSVaryingName; |
| 433 | const char* fFSVaryingName; |
| 434 | |
| 435 | bool fIsFlipped; |
| 436 | |
| 437 | // @{ |
| 438 | /// Values last uploaded as uniforms |
| 439 | |
| 440 | SkScalar fCachedFocal; |
| 441 | |
| 442 | // @} |
| 443 | |
| 444 | private: |
| 445 | typedef GrGLGradientEffect INHERITED; |
| 446 | |
| 447 | }; |
| 448 | |
| 449 | const GrBackendEffectFactory& FocalOutside2PtConicalEffect::getFactory() const { |
| 450 | return GrTBackendEffectFactory<FocalOutside2PtConicalEffect>::getInstance(); |
| 451 | } |
| 452 | |
| 453 | GR_DEFINE_EFFECT_TEST(FocalOutside2PtConicalEffect); |
| 454 | |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 455 | GrEffect* FocalOutside2PtConicalEffect::TestCreate(SkRandom* random, |
| 456 | GrContext* context, |
| 457 | const GrDrawTargetCaps&, |
| 458 | GrTexture**) { |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 459 | SkPoint center1 = {random->nextUScalar1(), random->nextUScalar1()}; |
commit-bot@chromium.org | 8089467 | 2014-04-22 21:24:22 +0000 | [diff] [blame] | 460 | SkScalar radius1 = 0.f; |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 461 | SkPoint center2; |
| 462 | SkScalar radius2; |
| 463 | do { |
| 464 | center2.set(random->nextUScalar1(), random->nextUScalar1()); |
skia.committer@gmail.com | ede0c5c | 2014-04-23 03:04:11 +0000 | [diff] [blame] | 465 | // Need to make sure the centers are not the same or else focal point will be inside |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 466 | } while (center1 == center2); |
| 467 | SkPoint diff = center2 - center1; |
| 468 | SkScalar diffLen = diff.length(); |
| 469 | // Below makes sure that the focal point is not contained within circle two |
commit-bot@chromium.org | 8089467 | 2014-04-22 21:24:22 +0000 | [diff] [blame] | 470 | radius2 = random->nextRangeF(0.f, diffLen); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 471 | |
| 472 | SkColor colors[kMaxRandomGradientColors]; |
| 473 | SkScalar stopsArray[kMaxRandomGradientColors]; |
| 474 | SkScalar* stops = stopsArray; |
| 475 | SkShader::TileMode tm; |
| 476 | int colorCount = RandomGradientParams(random, colors, &stops, &tm); |
| 477 | SkAutoTUnref<SkShader> shader(SkGradientShader::CreateTwoPointConical(center1, radius1, |
| 478 | center2, radius2, |
| 479 | colors, stops, colorCount, |
| 480 | tm)); |
| 481 | SkPaint paint; |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 482 | GrEffect* effect; |
| 483 | GrColor paintColor; |
| 484 | SkAssertResult(shader->asNewEffect(context, paint, NULL, &paintColor, &effect)); |
dandov | 9de5b51 | 2014-06-10 14:38:28 -0700 | [diff] [blame] | 485 | return effect; |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 486 | } |
| 487 | |
| 488 | GLFocalOutside2PtConicalEffect::GLFocalOutside2PtConicalEffect(const GrBackendEffectFactory& factory, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 489 | const GrEffect& effect) |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 490 | : INHERITED(factory) |
| 491 | , fVSVaryingName(NULL) |
| 492 | , fFSVaryingName(NULL) |
| 493 | , fCachedFocal(SK_ScalarMax) { |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 494 | const FocalOutside2PtConicalEffect& data = effect.cast<FocalOutside2PtConicalEffect>(); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 495 | fIsFlipped = data.isFlipped(); |
| 496 | } |
| 497 | |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 498 | void GLFocalOutside2PtConicalEffect::emitCode(GrGLProgramBuilder* builder, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 499 | const GrEffect&, |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 500 | const GrEffectKey& key, |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 501 | const char* outputColor, |
| 502 | const char* inputColor, |
| 503 | const TransformedCoordsArray& coords, |
| 504 | const TextureSamplerArray& samplers) { |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 505 | uint32_t baseKey = key.get32(0); |
| 506 | this->emitUniforms(builder, baseKey); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 507 | fParamUni = builder->addUniformArray(GrGLProgramBuilder::kFragment_Visibility, |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 508 | kFloat_GrSLType, "Conical2FSParams", 2); |
| 509 | SkString tName("t"); |
| 510 | SkString p0; // focalX |
| 511 | SkString p1; // 1 - focalX * focalX |
| 512 | |
| 513 | builder->getUniformVariable(fParamUni).appendArrayAccess(0, &p0); |
| 514 | builder->getUniformVariable(fParamUni).appendArrayAccess(1, &p1); |
| 515 | |
| 516 | // if we have a vec3 from being in perspective, convert it to a vec2 first |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 517 | GrGLFragmentShaderBuilder* fsBuilder = builder->getFragmentShaderBuilder(); |
| 518 | SkString coords2DString = fsBuilder->ensureFSCoords2D(coords, 0); |
skia.committer@gmail.com | ede0c5c | 2014-04-23 03:04:11 +0000 | [diff] [blame] | 519 | const char* coords2D = coords2DString.c_str(); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 520 | |
| 521 | // t = p.x * focal.x +/- sqrt(p.x^2 + (1 - focal.x^2) * p.y^2) |
| 522 | |
| 523 | // output will default to transparent black (we simply won't write anything |
| 524 | // else to it if invalid, instead of discarding or returning prematurely) |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 525 | fsBuilder->codeAppendf("\t%s = vec4(0.0,0.0,0.0,0.0);\n", outputColor); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 526 | |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 527 | fsBuilder->codeAppendf("\tfloat xs = %s.x * %s.x;\n", coords2D, coords2D); |
| 528 | fsBuilder->codeAppendf("\tfloat ys = %s.y * %s.y;\n", coords2D, coords2D); |
| 529 | fsBuilder->codeAppendf("\tfloat d = xs + %s * ys;\n", p1.c_str()); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 530 | |
| 531 | // Must check to see if we flipped the circle order (to make sure start radius < end radius) |
| 532 | // If so we must also flip sign on sqrt |
| 533 | if (!fIsFlipped) { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 534 | fsBuilder->codeAppendf("\tfloat %s = %s.x * %s + sqrt(d);\n", tName.c_str(), |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 535 | coords2D, p0.c_str()); |
| 536 | } else { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 537 | fsBuilder->codeAppendf("\tfloat %s = %s.x * %s - sqrt(d);\n", tName.c_str(), |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 538 | coords2D, p0.c_str()); |
| 539 | } |
| 540 | |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 541 | fsBuilder->codeAppendf("\tif (%s >= 0.0 && d >= 0.0) {\n", tName.c_str()); |
| 542 | fsBuilder->codeAppend("\t\t"); |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 543 | this->emitColor(builder, tName.c_str(), baseKey, outputColor, inputColor, samplers); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 544 | fsBuilder->codeAppend("\t}\n"); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 545 | } |
| 546 | |
kkinnunen | 7510b22 | 2014-07-30 00:04:16 -0700 | [diff] [blame] | 547 | void GLFocalOutside2PtConicalEffect::setData(const GrGLProgramDataManager& pdman, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 548 | const GrEffect& effect) { |
| 549 | INHERITED::setData(pdman, effect); |
| 550 | const FocalOutside2PtConicalEffect& data = effect.cast<FocalOutside2PtConicalEffect>(); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 551 | SkASSERT(data.isFlipped() == fIsFlipped); |
| 552 | SkScalar focal = data.focal(); |
| 553 | |
| 554 | if (fCachedFocal != focal) { |
commit-bot@chromium.org | 8089467 | 2014-04-22 21:24:22 +0000 | [diff] [blame] | 555 | SkScalar oneMinus2F = 1.f - SkScalarMul(focal, focal); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 556 | |
| 557 | float values[2] = { |
| 558 | SkScalarToFloat(focal), |
| 559 | SkScalarToFloat(oneMinus2F), |
| 560 | }; |
| 561 | |
kkinnunen | 7510b22 | 2014-07-30 00:04:16 -0700 | [diff] [blame] | 562 | pdman.set1fv(fParamUni, 2, values); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 563 | fCachedFocal = focal; |
| 564 | } |
| 565 | } |
| 566 | |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 567 | void GLFocalOutside2PtConicalEffect::GenKey(const GrEffect& effect, |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 568 | const GrGLCaps&, GrEffectKeyBuilder* b) { |
| 569 | uint32_t* key = b->add32n(2); |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 570 | key[0] = GenBaseGradientKey(effect); |
| 571 | key[1] = effect.cast<FocalOutside2PtConicalEffect>().isFlipped(); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 572 | } |
| 573 | |
| 574 | ////////////////////////////////////////////////////////////////////////////// |
| 575 | |
| 576 | class GLFocalInside2PtConicalEffect; |
| 577 | |
| 578 | class FocalInside2PtConicalEffect : public GrGradientEffect { |
| 579 | public: |
| 580 | |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 581 | static GrEffect* Create(GrContext* ctx, |
| 582 | const SkTwoPointConicalGradient& shader, |
| 583 | const SkMatrix& matrix, |
| 584 | SkShader::TileMode tm, |
| 585 | SkScalar focalX) { |
bsalomon | 55fad7a | 2014-07-08 07:34:20 -0700 | [diff] [blame] | 586 | return SkNEW_ARGS(FocalInside2PtConicalEffect, (ctx, shader, matrix, tm, focalX)); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 587 | } |
| 588 | |
| 589 | virtual ~FocalInside2PtConicalEffect() {} |
| 590 | |
| 591 | static const char* Name() { return "Two-Point Conical Gradient Focal Inside"; } |
| 592 | virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; |
| 593 | |
| 594 | SkScalar focal() const { return fFocalX; } |
| 595 | |
| 596 | typedef GLFocalInside2PtConicalEffect GLEffect; |
| 597 | |
| 598 | private: |
| 599 | virtual bool onIsEqual(const GrEffect& sBase) const SK_OVERRIDE { |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 600 | const FocalInside2PtConicalEffect& s = sBase.cast<FocalInside2PtConicalEffect>(); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 601 | return (INHERITED::onIsEqual(sBase) && |
| 602 | this->fFocalX == s.fFocalX); |
| 603 | } |
| 604 | |
| 605 | FocalInside2PtConicalEffect(GrContext* ctx, |
| 606 | const SkTwoPointConicalGradient& shader, |
| 607 | const SkMatrix& matrix, |
| 608 | SkShader::TileMode tm, |
| 609 | SkScalar focalX) |
| 610 | : INHERITED(ctx, shader, matrix, tm), fFocalX(focalX) {} |
| 611 | |
| 612 | GR_DECLARE_EFFECT_TEST; |
| 613 | |
| 614 | SkScalar fFocalX; |
| 615 | |
| 616 | typedef GrGradientEffect INHERITED; |
| 617 | }; |
| 618 | |
| 619 | class GLFocalInside2PtConicalEffect : public GrGLGradientEffect { |
| 620 | public: |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 621 | GLFocalInside2PtConicalEffect(const GrBackendEffectFactory& factory, const GrEffect&); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 622 | virtual ~GLFocalInside2PtConicalEffect() {} |
| 623 | |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 624 | virtual void emitCode(GrGLProgramBuilder*, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 625 | const GrEffect&, |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 626 | const GrEffectKey&, |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 627 | const char* outputColor, |
| 628 | const char* inputColor, |
| 629 | const TransformedCoordsArray&, |
| 630 | const TextureSamplerArray&) SK_OVERRIDE; |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 631 | virtual void setData(const GrGLProgramDataManager&, const GrEffect&) SK_OVERRIDE; |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 632 | |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 633 | static void GenKey(const GrEffect&, const GrGLCaps& caps, GrEffectKeyBuilder* b); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 634 | |
| 635 | protected: |
| 636 | UniformHandle fFocalUni; |
| 637 | |
| 638 | const char* fVSVaryingName; |
| 639 | const char* fFSVaryingName; |
| 640 | |
| 641 | // @{ |
| 642 | /// Values last uploaded as uniforms |
| 643 | |
| 644 | SkScalar fCachedFocal; |
| 645 | |
| 646 | // @} |
| 647 | |
| 648 | private: |
| 649 | typedef GrGLGradientEffect INHERITED; |
| 650 | |
| 651 | }; |
| 652 | |
| 653 | const GrBackendEffectFactory& FocalInside2PtConicalEffect::getFactory() const { |
| 654 | return GrTBackendEffectFactory<FocalInside2PtConicalEffect>::getInstance(); |
| 655 | } |
| 656 | |
| 657 | GR_DEFINE_EFFECT_TEST(FocalInside2PtConicalEffect); |
| 658 | |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 659 | GrEffect* FocalInside2PtConicalEffect::TestCreate(SkRandom* random, |
| 660 | GrContext* context, |
| 661 | const GrDrawTargetCaps&, |
| 662 | GrTexture**) { |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 663 | SkPoint center1 = {random->nextUScalar1(), random->nextUScalar1()}; |
commit-bot@chromium.org | 8089467 | 2014-04-22 21:24:22 +0000 | [diff] [blame] | 664 | SkScalar radius1 = 0.f; |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 665 | SkPoint center2; |
| 666 | SkScalar radius2; |
| 667 | do { |
| 668 | center2.set(random->nextUScalar1(), random->nextUScalar1()); |
| 669 | // Below makes sure radius2 is larger enouch such that the focal point |
| 670 | // is inside the end circle |
| 671 | SkScalar increase = random->nextUScalar1(); |
| 672 | SkPoint diff = center2 - center1; |
| 673 | SkScalar diffLen = diff.length(); |
| 674 | radius2 = diffLen + increase; |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 675 | // If the circles are identical the factory will give us an empty shader. |
| 676 | } while (radius1 == radius2 && center1 == center2); |
| 677 | |
| 678 | SkColor colors[kMaxRandomGradientColors]; |
| 679 | SkScalar stopsArray[kMaxRandomGradientColors]; |
| 680 | SkScalar* stops = stopsArray; |
| 681 | SkShader::TileMode tm; |
| 682 | int colorCount = RandomGradientParams(random, colors, &stops, &tm); |
| 683 | SkAutoTUnref<SkShader> shader(SkGradientShader::CreateTwoPointConical(center1, radius1, |
| 684 | center2, radius2, |
| 685 | colors, stops, colorCount, |
| 686 | tm)); |
| 687 | SkPaint paint; |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 688 | GrColor paintColor; |
| 689 | GrEffect* effect; |
| 690 | SkAssertResult(shader->asNewEffect(context, paint, NULL, &paintColor, &effect)); |
| 691 | return effect; |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 692 | } |
| 693 | |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 694 | GLFocalInside2PtConicalEffect::GLFocalInside2PtConicalEffect(const GrBackendEffectFactory& factory, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 695 | const GrEffect& effect) |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 696 | : INHERITED(factory) |
| 697 | , fVSVaryingName(NULL) |
| 698 | , fFSVaryingName(NULL) |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 699 | , fCachedFocal(SK_ScalarMax) {} |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 700 | |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 701 | void GLFocalInside2PtConicalEffect::emitCode(GrGLProgramBuilder* builder, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 702 | const GrEffect&, |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 703 | const GrEffectKey& key, |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 704 | const char* outputColor, |
| 705 | const char* inputColor, |
| 706 | const TransformedCoordsArray& coords, |
| 707 | const TextureSamplerArray& samplers) { |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 708 | uint32_t baseKey = key.get32(0); |
| 709 | this->emitUniforms(builder, baseKey); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 710 | fFocalUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility, |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 711 | kFloat_GrSLType, "Conical2FSParams"); |
| 712 | SkString tName("t"); |
| 713 | |
| 714 | // this is the distance along x-axis from the end center to focal point in |
| 715 | // transformed coordinates |
| 716 | GrGLShaderVar focal = builder->getUniformVariable(fFocalUni); |
| 717 | |
| 718 | // if we have a vec3 from being in perspective, convert it to a vec2 first |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 719 | GrGLFragmentShaderBuilder* fsBuilder = builder->getFragmentShaderBuilder(); |
| 720 | SkString coords2DString = fsBuilder->ensureFSCoords2D(coords, 0); |
skia.committer@gmail.com | ede0c5c | 2014-04-23 03:04:11 +0000 | [diff] [blame] | 721 | const char* coords2D = coords2DString.c_str(); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 722 | |
| 723 | // t = p.x * focalX + length(p) |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 724 | fsBuilder->codeAppendf("\tfloat %s = %s.x * %s + length(%s);\n", tName.c_str(), |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 725 | coords2D, focal.c_str(), coords2D); |
| 726 | |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 727 | this->emitColor(builder, tName.c_str(), baseKey, outputColor, inputColor, samplers); |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 728 | } |
| 729 | |
kkinnunen | 7510b22 | 2014-07-30 00:04:16 -0700 | [diff] [blame] | 730 | void GLFocalInside2PtConicalEffect::setData(const GrGLProgramDataManager& pdman, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 731 | const GrEffect& effect) { |
| 732 | INHERITED::setData(pdman, effect); |
| 733 | const FocalInside2PtConicalEffect& data = effect.cast<FocalInside2PtConicalEffect>(); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 734 | SkScalar focal = data.focal(); |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 735 | |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 736 | if (fCachedFocal != focal) { |
kkinnunen | 7510b22 | 2014-07-30 00:04:16 -0700 | [diff] [blame] | 737 | pdman.set1f(fFocalUni, SkScalarToFloat(focal)); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 738 | fCachedFocal = focal; |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 739 | } |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 740 | } |
| 741 | |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 742 | void GLFocalInside2PtConicalEffect::GenKey(const GrEffect& effect, |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 743 | const GrGLCaps&, GrEffectKeyBuilder* b) { |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 744 | b->add32(GenBaseGradientKey(effect)); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 745 | } |
| 746 | |
| 747 | ////////////////////////////////////////////////////////////////////////////// |
| 748 | // Circle Conical Gradients |
| 749 | ////////////////////////////////////////////////////////////////////////////// |
| 750 | |
| 751 | struct CircleConicalInfo { |
| 752 | SkPoint fCenterEnd; |
| 753 | SkScalar fA; |
| 754 | SkScalar fB; |
| 755 | SkScalar fC; |
| 756 | }; |
| 757 | |
| 758 | // Returns focal distance along x-axis in transformed coords |
| 759 | static ConicalType set_matrix_circle_conical(const SkTwoPointConicalGradient& shader, |
| 760 | SkMatrix* invLMatrix, CircleConicalInfo* info) { |
| 761 | // Inverse of the current local matrix is passed in then, |
| 762 | // translate and scale such that start circle is on the origin and has radius 1 |
| 763 | const SkPoint& centerStart = shader.getStartCenter(); |
| 764 | const SkPoint& centerEnd = shader.getEndCenter(); |
| 765 | SkScalar radiusStart = shader.getStartRadius(); |
| 766 | SkScalar radiusEnd = shader.getEndRadius(); |
| 767 | |
| 768 | SkMatrix matrix; |
| 769 | |
| 770 | matrix.setTranslate(-centerStart.fX, -centerStart.fY); |
| 771 | |
commit-bot@chromium.org | 8089467 | 2014-04-22 21:24:22 +0000 | [diff] [blame] | 772 | SkScalar invStartRad = 1.f / radiusStart; |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 773 | matrix.postScale(invStartRad, invStartRad); |
| 774 | |
| 775 | radiusEnd /= radiusStart; |
| 776 | |
| 777 | SkPoint centerEndTrans; |
| 778 | matrix.mapPoints(¢erEndTrans, ¢erEnd, 1); |
| 779 | |
| 780 | SkScalar A = centerEndTrans.fX * centerEndTrans.fX + centerEndTrans.fY * centerEndTrans.fY |
| 781 | - radiusEnd * radiusEnd + 2 * radiusEnd - 1; |
| 782 | |
| 783 | // Check to see if start circle is inside end circle with edges touching. |
| 784 | // If touching we return that it is of kEdge_ConicalType, and leave the matrix setting |
egdaniel | 8405ef9 | 2014-06-09 11:57:28 -0700 | [diff] [blame] | 785 | // to the edge shader. kEdgeErrorTol = 5 * kErrorTol was picked after manual testing |
| 786 | // so that C = 1 / A is stable, and the linear approximation used in the Edge shader is |
| 787 | // still accurate. |
| 788 | if (SkScalarAbs(A) < kEdgeErrorTol) { |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 789 | return kEdge_ConicalType; |
| 790 | } |
| 791 | |
commit-bot@chromium.org | 8089467 | 2014-04-22 21:24:22 +0000 | [diff] [blame] | 792 | SkScalar C = 1.f / A; |
| 793 | SkScalar B = (radiusEnd - 1.f) * C; |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 794 | |
| 795 | matrix.postScale(C, C); |
| 796 | |
| 797 | invLMatrix->postConcat(matrix); |
| 798 | |
| 799 | info->fCenterEnd = centerEndTrans; |
| 800 | info->fA = A; |
| 801 | info->fB = B; |
| 802 | info->fC = C; |
| 803 | |
| 804 | // if A ends up being negative, the start circle is contained completely inside the end cirlce |
commit-bot@chromium.org | 8089467 | 2014-04-22 21:24:22 +0000 | [diff] [blame] | 805 | if (A < 0.f) { |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 806 | return kInside_ConicalType; |
| 807 | } |
| 808 | return kOutside_ConicalType; |
| 809 | } |
| 810 | |
| 811 | class GLCircleInside2PtConicalEffect; |
| 812 | |
| 813 | class CircleInside2PtConicalEffect : public GrGradientEffect { |
| 814 | public: |
| 815 | |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 816 | static GrEffect* Create(GrContext* ctx, |
| 817 | const SkTwoPointConicalGradient& shader, |
| 818 | const SkMatrix& matrix, |
| 819 | SkShader::TileMode tm, |
| 820 | const CircleConicalInfo& info) { |
bsalomon | 55fad7a | 2014-07-08 07:34:20 -0700 | [diff] [blame] | 821 | return SkNEW_ARGS(CircleInside2PtConicalEffect, (ctx, shader, matrix, tm, info)); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 822 | } |
| 823 | |
| 824 | virtual ~CircleInside2PtConicalEffect() {} |
| 825 | |
| 826 | static const char* Name() { return "Two-Point Conical Gradient Inside"; } |
| 827 | virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; |
| 828 | |
| 829 | SkScalar centerX() const { return fInfo.fCenterEnd.fX; } |
| 830 | SkScalar centerY() const { return fInfo.fCenterEnd.fY; } |
| 831 | SkScalar A() const { return fInfo.fA; } |
| 832 | SkScalar B() const { return fInfo.fB; } |
| 833 | SkScalar C() const { return fInfo.fC; } |
| 834 | |
| 835 | typedef GLCircleInside2PtConicalEffect GLEffect; |
| 836 | |
| 837 | private: |
| 838 | virtual bool onIsEqual(const GrEffect& sBase) const SK_OVERRIDE { |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 839 | const CircleInside2PtConicalEffect& s = sBase.cast<CircleInside2PtConicalEffect>(); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 840 | return (INHERITED::onIsEqual(sBase) && |
| 841 | this->fInfo.fCenterEnd == s.fInfo.fCenterEnd && |
| 842 | this->fInfo.fA == s.fInfo.fA && |
| 843 | this->fInfo.fB == s.fInfo.fB && |
| 844 | this->fInfo.fC == s.fInfo.fC); |
| 845 | } |
| 846 | |
| 847 | CircleInside2PtConicalEffect(GrContext* ctx, |
| 848 | const SkTwoPointConicalGradient& shader, |
| 849 | const SkMatrix& matrix, |
| 850 | SkShader::TileMode tm, |
| 851 | const CircleConicalInfo& info) |
| 852 | : INHERITED(ctx, shader, matrix, tm), fInfo(info) {} |
| 853 | |
| 854 | GR_DECLARE_EFFECT_TEST; |
| 855 | |
| 856 | const CircleConicalInfo fInfo; |
| 857 | |
| 858 | typedef GrGradientEffect INHERITED; |
| 859 | }; |
| 860 | |
| 861 | class GLCircleInside2PtConicalEffect : public GrGLGradientEffect { |
| 862 | public: |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 863 | GLCircleInside2PtConicalEffect(const GrBackendEffectFactory& factory, const GrEffect&); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 864 | virtual ~GLCircleInside2PtConicalEffect() {} |
| 865 | |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 866 | virtual void emitCode(GrGLProgramBuilder*, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 867 | const GrEffect&, |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 868 | const GrEffectKey&, |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 869 | const char* outputColor, |
| 870 | const char* inputColor, |
| 871 | const TransformedCoordsArray&, |
| 872 | const TextureSamplerArray&) SK_OVERRIDE; |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 873 | virtual void setData(const GrGLProgramDataManager&, const GrEffect&) SK_OVERRIDE; |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 874 | |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 875 | static void GenKey(const GrEffect&, const GrGLCaps& caps, GrEffectKeyBuilder* b); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 876 | |
| 877 | protected: |
| 878 | UniformHandle fCenterUni; |
| 879 | UniformHandle fParamUni; |
| 880 | |
| 881 | const char* fVSVaryingName; |
| 882 | const char* fFSVaryingName; |
| 883 | |
| 884 | // @{ |
| 885 | /// Values last uploaded as uniforms |
| 886 | |
| 887 | SkScalar fCachedCenterX; |
| 888 | SkScalar fCachedCenterY; |
| 889 | SkScalar fCachedA; |
| 890 | SkScalar fCachedB; |
| 891 | SkScalar fCachedC; |
| 892 | |
| 893 | // @} |
| 894 | |
| 895 | private: |
| 896 | typedef GrGLGradientEffect INHERITED; |
| 897 | |
| 898 | }; |
| 899 | |
| 900 | const GrBackendEffectFactory& CircleInside2PtConicalEffect::getFactory() const { |
| 901 | return GrTBackendEffectFactory<CircleInside2PtConicalEffect>::getInstance(); |
| 902 | } |
| 903 | |
| 904 | GR_DEFINE_EFFECT_TEST(CircleInside2PtConicalEffect); |
| 905 | |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 906 | GrEffect* CircleInside2PtConicalEffect::TestCreate(SkRandom* random, |
| 907 | GrContext* context, |
| 908 | const GrDrawTargetCaps&, |
| 909 | GrTexture**) { |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 910 | SkPoint center1 = {random->nextUScalar1(), random->nextUScalar1()}; |
commit-bot@chromium.org | 8089467 | 2014-04-22 21:24:22 +0000 | [diff] [blame] | 911 | SkScalar radius1 = random->nextUScalar1() + 0.0001f; // make sure radius1 != 0 |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 912 | SkPoint center2; |
| 913 | SkScalar radius2; |
| 914 | do { |
| 915 | center2.set(random->nextUScalar1(), random->nextUScalar1()); |
| 916 | // Below makes sure that circle one is contained within circle two |
| 917 | SkScalar increase = random->nextUScalar1(); |
| 918 | SkPoint diff = center2 - center1; |
| 919 | SkScalar diffLen = diff.length(); |
| 920 | radius2 = radius1 + diffLen + increase; |
| 921 | // If the circles are identical the factory will give us an empty shader. |
| 922 | } while (radius1 == radius2 && center1 == center2); |
| 923 | |
| 924 | SkColor colors[kMaxRandomGradientColors]; |
| 925 | SkScalar stopsArray[kMaxRandomGradientColors]; |
| 926 | SkScalar* stops = stopsArray; |
| 927 | SkShader::TileMode tm; |
| 928 | int colorCount = RandomGradientParams(random, colors, &stops, &tm); |
| 929 | SkAutoTUnref<SkShader> shader(SkGradientShader::CreateTwoPointConical(center1, radius1, |
| 930 | center2, radius2, |
| 931 | colors, stops, colorCount, |
| 932 | tm)); |
| 933 | SkPaint paint; |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 934 | GrColor paintColor; |
| 935 | GrEffect* effect; |
| 936 | SkAssertResult(shader->asNewEffect(context, paint, NULL, &paintColor, &effect)); |
| 937 | return effect; |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 938 | } |
| 939 | |
| 940 | GLCircleInside2PtConicalEffect::GLCircleInside2PtConicalEffect(const GrBackendEffectFactory& factory, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 941 | const GrEffect& effect) |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 942 | : INHERITED(factory) |
| 943 | , fVSVaryingName(NULL) |
| 944 | , fFSVaryingName(NULL) |
| 945 | , fCachedCenterX(SK_ScalarMax) |
| 946 | , fCachedCenterY(SK_ScalarMax) |
| 947 | , fCachedA(SK_ScalarMax) |
| 948 | , fCachedB(SK_ScalarMax) |
| 949 | , fCachedC(SK_ScalarMax) {} |
| 950 | |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 951 | void GLCircleInside2PtConicalEffect::emitCode(GrGLProgramBuilder* builder, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 952 | const GrEffect&, |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 953 | const GrEffectKey& key, |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 954 | const char* outputColor, |
| 955 | const char* inputColor, |
| 956 | const TransformedCoordsArray& coords, |
| 957 | const TextureSamplerArray& samplers) { |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 958 | uint32_t baseKey = key.get32(0); |
| 959 | this->emitUniforms(builder, baseKey); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 960 | fCenterUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility, |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 961 | kVec2f_GrSLType, "Conical2FSCenter"); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 962 | fParamUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility, |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 963 | kVec3f_GrSLType, "Conical2FSParams"); |
| 964 | SkString tName("t"); |
| 965 | |
| 966 | GrGLShaderVar center = builder->getUniformVariable(fCenterUni); |
| 967 | // params.x = A |
| 968 | // params.y = B |
| 969 | // params.z = C |
| 970 | GrGLShaderVar params = builder->getUniformVariable(fParamUni); |
| 971 | |
| 972 | // if we have a vec3 from being in perspective, convert it to a vec2 first |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 973 | GrGLFragmentShaderBuilder* fsBuilder = builder->getFragmentShaderBuilder(); |
| 974 | SkString coords2DString = fsBuilder->ensureFSCoords2D(coords, 0); |
skia.committer@gmail.com | ede0c5c | 2014-04-23 03:04:11 +0000 | [diff] [blame] | 975 | const char* coords2D = coords2DString.c_str(); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 976 | |
| 977 | // p = coords2D |
| 978 | // e = center end |
| 979 | // r = radius end |
| 980 | // A = dot(e, e) - r^2 + 2 * r - 1 |
| 981 | // B = (r -1) / A |
| 982 | // C = 1 / A |
| 983 | // d = dot(e, p) + B |
| 984 | // t = d +/- sqrt(d^2 - A * dot(p, p) + C) |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 985 | fsBuilder->codeAppendf("\tfloat pDotp = dot(%s, %s);\n", coords2D, coords2D); |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 986 | fsBuilder->codeAppendf("\tfloat d = dot(%s, %s) + %s.y;\n", coords2D, center.c_str(), |
| 987 | params.c_str()); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 988 | fsBuilder->codeAppendf("\tfloat %s = d + sqrt(d * d - %s.x * pDotp + %s.z);\n", |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 989 | tName.c_str(), params.c_str(), params.c_str()); |
| 990 | |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 991 | this->emitColor(builder, tName.c_str(), baseKey, outputColor, inputColor, samplers); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 992 | } |
| 993 | |
kkinnunen | 7510b22 | 2014-07-30 00:04:16 -0700 | [diff] [blame] | 994 | void GLCircleInside2PtConicalEffect::setData(const GrGLProgramDataManager& pdman, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 995 | const GrEffect& effect) { |
| 996 | INHERITED::setData(pdman, effect); |
| 997 | const CircleInside2PtConicalEffect& data = effect.cast<CircleInside2PtConicalEffect>(); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 998 | SkScalar centerX = data.centerX(); |
| 999 | SkScalar centerY = data.centerY(); |
| 1000 | SkScalar A = data.A(); |
| 1001 | SkScalar B = data.B(); |
| 1002 | SkScalar C = data.C(); |
| 1003 | |
| 1004 | if (fCachedCenterX != centerX || fCachedCenterY != centerY || |
| 1005 | fCachedA != A || fCachedB != B || fCachedC != C) { |
| 1006 | |
kkinnunen | 7510b22 | 2014-07-30 00:04:16 -0700 | [diff] [blame] | 1007 | pdman.set2f(fCenterUni, SkScalarToFloat(centerX), SkScalarToFloat(centerY)); |
| 1008 | pdman.set3f(fParamUni, SkScalarToFloat(A), SkScalarToFloat(B), SkScalarToFloat(C)); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1009 | |
| 1010 | fCachedCenterX = centerX; |
| 1011 | fCachedCenterY = centerY; |
| 1012 | fCachedA = A; |
| 1013 | fCachedB = B; |
| 1014 | fCachedC = C; |
| 1015 | } |
| 1016 | } |
| 1017 | |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 1018 | void GLCircleInside2PtConicalEffect::GenKey(const GrEffect& effect, |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 1019 | const GrGLCaps&, GrEffectKeyBuilder* b) { |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 1020 | b->add32(GenBaseGradientKey(effect)); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1021 | } |
| 1022 | |
| 1023 | ////////////////////////////////////////////////////////////////////////////// |
| 1024 | |
| 1025 | class GLCircleOutside2PtConicalEffect; |
| 1026 | |
| 1027 | class CircleOutside2PtConicalEffect : public GrGradientEffect { |
| 1028 | public: |
| 1029 | |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 1030 | static GrEffect* Create(GrContext* ctx, |
| 1031 | const SkTwoPointConicalGradient& shader, |
| 1032 | const SkMatrix& matrix, |
| 1033 | SkShader::TileMode tm, |
| 1034 | const CircleConicalInfo& info) { |
bsalomon | 55fad7a | 2014-07-08 07:34:20 -0700 | [diff] [blame] | 1035 | return SkNEW_ARGS(CircleOutside2PtConicalEffect, (ctx, shader, matrix, tm, info)); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1036 | } |
| 1037 | |
| 1038 | virtual ~CircleOutside2PtConicalEffect() {} |
| 1039 | |
| 1040 | static const char* Name() { return "Two-Point Conical Gradient Outside"; } |
| 1041 | virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; |
| 1042 | |
| 1043 | SkScalar centerX() const { return fInfo.fCenterEnd.fX; } |
| 1044 | SkScalar centerY() const { return fInfo.fCenterEnd.fY; } |
| 1045 | SkScalar A() const { return fInfo.fA; } |
| 1046 | SkScalar B() const { return fInfo.fB; } |
| 1047 | SkScalar C() const { return fInfo.fC; } |
| 1048 | SkScalar tLimit() const { return fTLimit; } |
| 1049 | bool isFlipped() const { return fIsFlipped; } |
| 1050 | |
| 1051 | typedef GLCircleOutside2PtConicalEffect GLEffect; |
| 1052 | |
| 1053 | private: |
| 1054 | virtual bool onIsEqual(const GrEffect& sBase) const SK_OVERRIDE { |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 1055 | const CircleOutside2PtConicalEffect& s = sBase.cast<CircleOutside2PtConicalEffect>(); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1056 | return (INHERITED::onIsEqual(sBase) && |
| 1057 | this->fInfo.fCenterEnd == s.fInfo.fCenterEnd && |
| 1058 | this->fInfo.fA == s.fInfo.fA && |
| 1059 | this->fInfo.fB == s.fInfo.fB && |
| 1060 | this->fInfo.fC == s.fInfo.fC && |
| 1061 | this->fTLimit == s.fTLimit && |
| 1062 | this->fIsFlipped == s.fIsFlipped); |
| 1063 | } |
| 1064 | |
| 1065 | CircleOutside2PtConicalEffect(GrContext* ctx, |
| 1066 | const SkTwoPointConicalGradient& shader, |
| 1067 | const SkMatrix& matrix, |
| 1068 | SkShader::TileMode tm, |
| 1069 | const CircleConicalInfo& info) |
| 1070 | : INHERITED(ctx, shader, matrix, tm), fInfo(info) { |
| 1071 | if (shader.getStartRadius() != shader.getEndRadius()) { |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 1072 | fTLimit = SkScalarDiv(shader.getStartRadius(), |
| 1073 | (shader.getStartRadius() - shader.getEndRadius())); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1074 | } else { |
| 1075 | fTLimit = SK_ScalarMin; |
| 1076 | } |
| 1077 | |
| 1078 | fIsFlipped = shader.isFlippedGrad(); |
| 1079 | } |
| 1080 | |
| 1081 | GR_DECLARE_EFFECT_TEST; |
| 1082 | |
| 1083 | const CircleConicalInfo fInfo; |
| 1084 | SkScalar fTLimit; |
| 1085 | bool fIsFlipped; |
| 1086 | |
| 1087 | typedef GrGradientEffect INHERITED; |
| 1088 | }; |
| 1089 | |
| 1090 | class GLCircleOutside2PtConicalEffect : public GrGLGradientEffect { |
| 1091 | public: |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 1092 | GLCircleOutside2PtConicalEffect(const GrBackendEffectFactory& factory, const GrEffect&); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1093 | virtual ~GLCircleOutside2PtConicalEffect() {} |
| 1094 | |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 1095 | virtual void emitCode(GrGLProgramBuilder*, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 1096 | const GrEffect&, |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 1097 | const GrEffectKey&, |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1098 | const char* outputColor, |
| 1099 | const char* inputColor, |
| 1100 | const TransformedCoordsArray&, |
| 1101 | const TextureSamplerArray&) SK_OVERRIDE; |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 1102 | virtual void setData(const GrGLProgramDataManager&, const GrEffect&) SK_OVERRIDE; |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1103 | |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 1104 | static void GenKey(const GrEffect&, const GrGLCaps& caps, GrEffectKeyBuilder* b); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1105 | |
| 1106 | protected: |
| 1107 | UniformHandle fCenterUni; |
| 1108 | UniformHandle fParamUni; |
| 1109 | |
| 1110 | const char* fVSVaryingName; |
| 1111 | const char* fFSVaryingName; |
| 1112 | |
| 1113 | bool fIsFlipped; |
| 1114 | |
| 1115 | // @{ |
| 1116 | /// Values last uploaded as uniforms |
| 1117 | |
| 1118 | SkScalar fCachedCenterX; |
| 1119 | SkScalar fCachedCenterY; |
| 1120 | SkScalar fCachedA; |
| 1121 | SkScalar fCachedB; |
| 1122 | SkScalar fCachedC; |
| 1123 | SkScalar fCachedTLimit; |
| 1124 | |
| 1125 | // @} |
| 1126 | |
| 1127 | private: |
| 1128 | typedef GrGLGradientEffect INHERITED; |
| 1129 | |
| 1130 | }; |
| 1131 | |
| 1132 | const GrBackendEffectFactory& CircleOutside2PtConicalEffect::getFactory() const { |
| 1133 | return GrTBackendEffectFactory<CircleOutside2PtConicalEffect>::getInstance(); |
| 1134 | } |
| 1135 | |
| 1136 | GR_DEFINE_EFFECT_TEST(CircleOutside2PtConicalEffect); |
| 1137 | |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 1138 | GrEffect* CircleOutside2PtConicalEffect::TestCreate(SkRandom* random, |
| 1139 | GrContext* context, |
| 1140 | const GrDrawTargetCaps&, |
| 1141 | GrTexture**) { |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1142 | SkPoint center1 = {random->nextUScalar1(), random->nextUScalar1()}; |
commit-bot@chromium.org | 8089467 | 2014-04-22 21:24:22 +0000 | [diff] [blame] | 1143 | SkScalar radius1 = random->nextUScalar1() + 0.0001f; // make sure radius1 != 0 |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1144 | SkPoint center2; |
| 1145 | SkScalar radius2; |
| 1146 | SkScalar diffLen; |
| 1147 | do { |
| 1148 | center2.set(random->nextUScalar1(), random->nextUScalar1()); |
| 1149 | // If the circles share a center than we can't be in the outside case |
| 1150 | } while (center1 == center2); |
| 1151 | SkPoint diff = center2 - center1; |
| 1152 | diffLen = diff.length(); |
| 1153 | // Below makes sure that circle one is not contained within circle two |
| 1154 | // and have radius2 >= radius to match sorting on cpu side |
commit-bot@chromium.org | 8089467 | 2014-04-22 21:24:22 +0000 | [diff] [blame] | 1155 | radius2 = radius1 + random->nextRangeF(0.f, diffLen); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1156 | |
| 1157 | SkColor colors[kMaxRandomGradientColors]; |
| 1158 | SkScalar stopsArray[kMaxRandomGradientColors]; |
| 1159 | SkScalar* stops = stopsArray; |
| 1160 | SkShader::TileMode tm; |
| 1161 | int colorCount = RandomGradientParams(random, colors, &stops, &tm); |
| 1162 | SkAutoTUnref<SkShader> shader(SkGradientShader::CreateTwoPointConical(center1, radius1, |
| 1163 | center2, radius2, |
| 1164 | colors, stops, colorCount, |
| 1165 | tm)); |
| 1166 | SkPaint paint; |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 1167 | GrColor paintColor; |
| 1168 | GrEffect* effect; |
| 1169 | SkAssertResult(shader->asNewEffect(context, paint, NULL, &paintColor, &effect)); |
| 1170 | return effect; |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1171 | } |
| 1172 | |
| 1173 | GLCircleOutside2PtConicalEffect::GLCircleOutside2PtConicalEffect(const GrBackendEffectFactory& factory, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 1174 | const GrEffect& effect) |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1175 | : INHERITED(factory) |
| 1176 | , fVSVaryingName(NULL) |
| 1177 | , fFSVaryingName(NULL) |
| 1178 | , fCachedCenterX(SK_ScalarMax) |
| 1179 | , fCachedCenterY(SK_ScalarMax) |
| 1180 | , fCachedA(SK_ScalarMax) |
| 1181 | , fCachedB(SK_ScalarMax) |
| 1182 | , fCachedC(SK_ScalarMax) |
| 1183 | , fCachedTLimit(SK_ScalarMax) { |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 1184 | const CircleOutside2PtConicalEffect& data = effect.cast<CircleOutside2PtConicalEffect>(); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1185 | fIsFlipped = data.isFlipped(); |
| 1186 | } |
| 1187 | |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 1188 | void GLCircleOutside2PtConicalEffect::emitCode(GrGLProgramBuilder* builder, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 1189 | const GrEffect&, |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 1190 | const GrEffectKey& key, |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1191 | const char* outputColor, |
| 1192 | const char* inputColor, |
| 1193 | const TransformedCoordsArray& coords, |
| 1194 | const TextureSamplerArray& samplers) { |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 1195 | uint32_t baseKey = key.get32(0); |
| 1196 | this->emitUniforms(builder, baseKey); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 1197 | fCenterUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility, |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1198 | kVec2f_GrSLType, "Conical2FSCenter"); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 1199 | fParamUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility, |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1200 | kVec4f_GrSLType, "Conical2FSParams"); |
| 1201 | SkString tName("t"); |
| 1202 | |
| 1203 | GrGLShaderVar center = builder->getUniformVariable(fCenterUni); |
| 1204 | // params.x = A |
| 1205 | // params.y = B |
| 1206 | // params.z = C |
| 1207 | GrGLShaderVar params = builder->getUniformVariable(fParamUni); |
| 1208 | |
| 1209 | // if we have a vec3 from being in perspective, convert it to a vec2 first |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 1210 | GrGLFragmentShaderBuilder* fsBuilder = builder->getFragmentShaderBuilder(); |
| 1211 | SkString coords2DString = fsBuilder->ensureFSCoords2D(coords, 0); |
skia.committer@gmail.com | ede0c5c | 2014-04-23 03:04:11 +0000 | [diff] [blame] | 1212 | const char* coords2D = coords2DString.c_str(); |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 1213 | |
| 1214 | // output will default to transparent black (we simply won't write anything |
| 1215 | // else to it if invalid, instead of discarding or returning prematurely) |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 1216 | fsBuilder->codeAppendf("\t%s = vec4(0.0,0.0,0.0,0.0);\n", outputColor); |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 1217 | |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1218 | // p = coords2D |
| 1219 | // e = center end |
| 1220 | // r = radius end |
| 1221 | // A = dot(e, e) - r^2 + 2 * r - 1 |
| 1222 | // B = (r -1) / A |
| 1223 | // C = 1 / A |
| 1224 | // d = dot(e, p) + B |
| 1225 | // t = d +/- sqrt(d^2 - A * dot(p, p) + C) |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 1226 | |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 1227 | fsBuilder->codeAppendf("\tfloat pDotp = dot(%s, %s);\n", coords2D, coords2D); |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 1228 | fsBuilder->codeAppendf("\tfloat d = dot(%s, %s) + %s.y;\n", coords2D, center.c_str(), |
| 1229 | params.c_str()); |
| 1230 | fsBuilder->codeAppendf("\tfloat deter = d * d - %s.x * pDotp + %s.z;\n", params.c_str(), |
| 1231 | params.c_str()); |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 1232 | |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1233 | // Must check to see if we flipped the circle order (to make sure start radius < end radius) |
| 1234 | // If so we must also flip sign on sqrt |
| 1235 | if (!fIsFlipped) { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 1236 | fsBuilder->codeAppendf("\tfloat %s = d + sqrt(deter);\n", tName.c_str()); |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 1237 | } else { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 1238 | fsBuilder->codeAppendf("\tfloat %s = d - sqrt(deter);\n", tName.c_str()); |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 1239 | } |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1240 | |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 1241 | fsBuilder->codeAppendf("\tif (%s >= %s.w && deter >= 0.0) {\n", tName.c_str(), params.c_str()); |
| 1242 | fsBuilder->codeAppend("\t\t"); |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 1243 | this->emitColor(builder, tName.c_str(), baseKey, outputColor, inputColor, samplers); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 1244 | fsBuilder->codeAppend("\t}\n"); |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 1245 | } |
| 1246 | |
kkinnunen | 7510b22 | 2014-07-30 00:04:16 -0700 | [diff] [blame] | 1247 | void GLCircleOutside2PtConicalEffect::setData(const GrGLProgramDataManager& pdman, |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 1248 | const GrEffect& effect) { |
| 1249 | INHERITED::setData(pdman, effect); |
| 1250 | const CircleOutside2PtConicalEffect& data = effect.cast<CircleOutside2PtConicalEffect>(); |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 1251 | SkASSERT(data.isFlipped() == fIsFlipped); |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1252 | SkScalar centerX = data.centerX(); |
| 1253 | SkScalar centerY = data.centerY(); |
| 1254 | SkScalar A = data.A(); |
| 1255 | SkScalar B = data.B(); |
| 1256 | SkScalar C = data.C(); |
| 1257 | SkScalar tLimit = data.tLimit(); |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 1258 | |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1259 | if (fCachedCenterX != centerX || fCachedCenterY != centerY || |
| 1260 | fCachedA != A || fCachedB != B || fCachedC != C || fCachedTLimit != tLimit) { |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 1261 | |
kkinnunen | 7510b22 | 2014-07-30 00:04:16 -0700 | [diff] [blame] | 1262 | pdman.set2f(fCenterUni, SkScalarToFloat(centerX), SkScalarToFloat(centerY)); |
| 1263 | pdman.set4f(fParamUni, SkScalarToFloat(A), SkScalarToFloat(B), SkScalarToFloat(C), |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1264 | SkScalarToFloat(tLimit)); |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 1265 | |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1266 | fCachedCenterX = centerX; |
| 1267 | fCachedCenterY = centerY; |
| 1268 | fCachedA = A; |
| 1269 | fCachedB = B; |
| 1270 | fCachedC = C; |
| 1271 | fCachedTLimit = tLimit; |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 1272 | } |
| 1273 | } |
| 1274 | |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 1275 | void GLCircleOutside2PtConicalEffect::GenKey(const GrEffect& effect, |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame] | 1276 | const GrGLCaps&, GrEffectKeyBuilder* b) { |
| 1277 | uint32_t* key = b->add32n(2); |
joshualitt | 49586be | 2014-09-16 08:21:41 -0700 | [diff] [blame^] | 1278 | key[0] = GenBaseGradientKey(effect); |
| 1279 | key[1] = effect.cast<CircleOutside2PtConicalEffect>().isFlipped(); |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 1280 | } |
commit-bot@chromium.org | 2af1a2d | 2014-04-04 13:50:50 +0000 | [diff] [blame] | 1281 | |
| 1282 | ////////////////////////////////////////////////////////////////////////////// |
| 1283 | |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 1284 | GrEffect* Gr2PtConicalGradientEffect::Create(GrContext* ctx, |
| 1285 | const SkTwoPointConicalGradient& shader, |
| 1286 | SkShader::TileMode tm, |
| 1287 | const SkMatrix* localMatrix) { |
commit-bot@chromium.org | 2af1a2d | 2014-04-04 13:50:50 +0000 | [diff] [blame] | 1288 | SkMatrix matrix; |
| 1289 | if (!shader.getLocalMatrix().invert(&matrix)) { |
| 1290 | return NULL; |
| 1291 | } |
commit-bot@chromium.org | 96fb748 | 2014-05-09 20:28:11 +0000 | [diff] [blame] | 1292 | if (localMatrix) { |
| 1293 | SkMatrix inv; |
| 1294 | if (!localMatrix->invert(&inv)) { |
| 1295 | return NULL; |
| 1296 | } |
| 1297 | matrix.postConcat(inv); |
| 1298 | } |
commit-bot@chromium.org | 2af1a2d | 2014-04-04 13:50:50 +0000 | [diff] [blame] | 1299 | |
commit-bot@chromium.org | c8379d7 | 2014-04-22 20:56:37 +0000 | [diff] [blame] | 1300 | if (shader.getStartRadius() < kErrorTol) { |
| 1301 | SkScalar focalX; |
| 1302 | ConicalType type = set_matrix_focal_conical(shader, &matrix, &focalX); |
| 1303 | if (type == kInside_ConicalType) { |
| 1304 | return FocalInside2PtConicalEffect::Create(ctx, shader, matrix, tm, focalX); |
| 1305 | } else if(type == kEdge_ConicalType) { |
| 1306 | set_matrix_edge_conical(shader, &matrix); |
| 1307 | return Edge2PtConicalEffect::Create(ctx, shader, matrix, tm); |
| 1308 | } else { |
| 1309 | return FocalOutside2PtConicalEffect::Create(ctx, shader, matrix, tm, focalX); |
| 1310 | } |
| 1311 | } |
| 1312 | |
| 1313 | CircleConicalInfo info; |
| 1314 | ConicalType type = set_matrix_circle_conical(shader, &matrix, &info); |
| 1315 | |
| 1316 | if (type == kInside_ConicalType) { |
| 1317 | return CircleInside2PtConicalEffect::Create(ctx, shader, matrix, tm, info); |
| 1318 | } else if (type == kEdge_ConicalType) { |
| 1319 | set_matrix_edge_conical(shader, &matrix); |
| 1320 | return Edge2PtConicalEffect::Create(ctx, shader, matrix, tm); |
| 1321 | } else { |
| 1322 | return CircleOutside2PtConicalEffect::Create(ctx, shader, matrix, tm, info); |
| 1323 | } |
commit-bot@chromium.org | 2af1a2d | 2014-04-04 13:50:50 +0000 | [diff] [blame] | 1324 | } |
| 1325 | |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 1326 | #endif |