jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2013 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 | |
jvanverth | 8ed3b9a | 2015-04-09 08:00:49 -0700 | [diff] [blame] | 8 | #include "GrDistanceFieldGeoProc.h" |
egdaniel | 605dd0f | 2014-11-12 08:35:25 -0800 | [diff] [blame] | 9 | #include "GrInvariantOutput.h" |
joshualitt | eb2a676 | 2014-12-04 11:35:33 -0800 | [diff] [blame] | 10 | #include "GrTexture.h" |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 11 | |
joshualitt | eb2a676 | 2014-12-04 11:35:33 -0800 | [diff] [blame] | 12 | #include "SkDistanceFieldGen.h" |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 13 | |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 14 | #include "glsl/GrGLSLFragmentShaderBuilder.h" |
egdaniel | e659a58 | 2015-11-13 09:55:43 -0800 | [diff] [blame] | 15 | #include "glsl/GrGLSLGeometryProcessor.h" |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 16 | #include "glsl/GrGLSLProgramBuilder.h" |
egdaniel | 018fb62 | 2015-10-28 07:26:40 -0700 | [diff] [blame] | 17 | #include "glsl/GrGLSLProgramDataManager.h" |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 18 | #include "glsl/GrGLSLVertexShaderBuilder.h" |
egdaniel | 64c4728 | 2015-11-13 06:54:19 -0800 | [diff] [blame] | 19 | #include "glsl/GrGLSLUtil.h" |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 20 | |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 21 | // Assuming a radius of a little less than the diagonal of the fragment |
jvanverth | 24ba008 | 2015-03-19 11:34:13 -0700 | [diff] [blame] | 22 | #define SK_DistanceFieldAAFactor "0.65" |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 23 | |
egdaniel | e659a58 | 2015-11-13 09:55:43 -0800 | [diff] [blame] | 24 | class GrGLDistanceFieldA8TextGeoProc : public GrGLSLGeometryProcessor { |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 25 | public: |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame] | 26 | GrGLDistanceFieldA8TextGeoProc() |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 27 | : fViewMatrix(SkMatrix::InvalidMatrix()) |
| 28 | , fColor(GrColor_ILLEGAL) |
jvanverth | 9564ce6 | 2014-09-16 05:45:19 -0700 | [diff] [blame] | 29 | #ifdef SK_GAMMA_APPLY_TO_A8 |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 30 | , fDistanceAdjust(-1.0f) |
jvanverth | 9564ce6 | 2014-09-16 05:45:19 -0700 | [diff] [blame] | 31 | #endif |
| 32 | {} |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 33 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 34 | void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override{ |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 35 | const GrDistanceFieldA8TextGeoProc& dfTexEffect = |
| 36 | args.fGP.cast<GrDistanceFieldA8TextGeoProc>(); |
egdaniel | 8dcdedc | 2015-11-11 06:27:20 -0800 | [diff] [blame] | 37 | GrGLSLGPBuilder* pb = args.fPB; |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 38 | GrGLSLFragmentBuilder* fsBuilder = pb->getFragmentShaderBuilder(); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 39 | SkAssertResult(fsBuilder->enableFeature( |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 40 | GrGLSLFragmentShaderBuilder::kStandardDerivatives_GLSLFeature)); |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 41 | |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 42 | GrGLSLVertexBuilder* vsBuilder = pb->getVertexShaderBuilder(); |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 43 | |
| 44 | // emit attributes |
| 45 | vsBuilder->emitAttributes(dfTexEffect); |
| 46 | |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 47 | #ifdef SK_GAMMA_APPLY_TO_A8 |
| 48 | // adjust based on gamma |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 49 | const char* distanceAdjustUniName = nullptr; |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 50 | // width, height, 1/(3*width) |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 51 | fDistanceAdjustUni = pb->addUniform(GrGLSLProgramBuilder::kFragment_Visibility, |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 52 | kFloat_GrSLType, kDefault_GrSLPrecision, |
| 53 | "DistanceAdjust", &distanceAdjustUniName); |
| 54 | #endif |
commit-bot@chromium.org | 6c89c34 | 2014-02-14 21:48:29 +0000 | [diff] [blame] | 55 | |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 56 | // Setup pass through color |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 57 | if (!dfTexEffect.colorIgnored()) { |
| 58 | if (dfTexEffect.hasVertexColor()) { |
| 59 | pb->addPassThroughAttribute(dfTexEffect.inColor(), args.fOutputColor); |
| 60 | } else { |
| 61 | this->setupUniformColor(pb, args.fOutputColor, &fColorUniform); |
| 62 | } |
| 63 | } |
commit-bot@chromium.org | 6c89c34 | 2014-02-14 21:48:29 +0000 | [diff] [blame] | 64 | |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 65 | // Setup position |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 66 | this->setupPosition(pb, gpArgs, dfTexEffect.inPosition()->fName, dfTexEffect.viewMatrix(), |
| 67 | &fViewMatrixUniform); |
joshualitt | 2dd1ae0 | 2014-12-03 06:24:10 -0800 | [diff] [blame] | 68 | |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 69 | // emit transforms |
egdaniel | f529439 | 2015-10-21 07:14:17 -0700 | [diff] [blame] | 70 | this->emitTransforms(pb, gpArgs->fPositionVar, dfTexEffect.inPosition()->fName, |
joshualitt | e3ababe | 2015-05-15 07:56:07 -0700 | [diff] [blame] | 71 | args.fTransformsIn, args.fTransformsOut); |
joshualitt | 4973d9d | 2014-11-08 09:24:25 -0800 | [diff] [blame] | 72 | |
jvanverth | bb4a1cf | 2015-04-07 09:06:00 -0700 | [diff] [blame] | 73 | // add varyings |
egdaniel | 8dcdedc | 2015-11-11 06:27:20 -0800 | [diff] [blame] | 74 | GrGLSLVertToFrag recipScale(kFloat_GrSLType); |
| 75 | GrGLSLVertToFrag st(kVec2f_GrSLType); |
jvanverth | bb4a1cf | 2015-04-07 09:06:00 -0700 | [diff] [blame] | 76 | bool isSimilarity = SkToBool(dfTexEffect.getFlags() & kSimilarity_DistanceFieldEffectFlag); |
egdaniel | f529439 | 2015-10-21 07:14:17 -0700 | [diff] [blame] | 77 | pb->addVarying("IntTextureCoords", &st, kHigh_GrSLPrecision); |
jvanverth | 221360a | 2015-04-15 12:31:22 -0700 | [diff] [blame] | 78 | vsBuilder->codeAppendf("%s = %s;", st.vsOut(), dfTexEffect.inTextureCoords()->fName); |
jvanverth | bb4a1cf | 2015-04-07 09:06:00 -0700 | [diff] [blame] | 79 | |
joshualitt | 922c8b1 | 2015-08-07 09:55:23 -0700 | [diff] [blame] | 80 | // compute numbers to be hardcoded to convert texture coordinates from int to float |
| 81 | SkASSERT(dfTexEffect.numTextures() == 1); |
| 82 | GrTexture* atlas = dfTexEffect.textureAccess(0).getTexture(); |
joshualitt | 7375d6b | 2015-08-07 13:36:44 -0700 | [diff] [blame] | 83 | SkASSERT(atlas && SkIsPow2(atlas->width()) && SkIsPow2(atlas->height())); |
joshualitt | 922c8b1 | 2015-08-07 09:55:23 -0700 | [diff] [blame] | 84 | SkScalar recipWidth = 1.0f / atlas->width(); |
| 85 | SkScalar recipHeight = 1.0f / atlas->height(); |
| 86 | |
egdaniel | 8dcdedc | 2015-11-11 06:27:20 -0800 | [diff] [blame] | 87 | GrGLSLVertToFrag uv(kVec2f_GrSLType); |
egdaniel | f529439 | 2015-10-21 07:14:17 -0700 | [diff] [blame] | 88 | pb->addVarying("TextureCoords", &uv, kHigh_GrSLPrecision); |
joshualitt | 922c8b1 | 2015-08-07 09:55:23 -0700 | [diff] [blame] | 89 | vsBuilder->codeAppendf("%s = vec2(%.*f, %.*f) * %s;", uv.vsOut(), |
joshualitt | 7375d6b | 2015-08-07 13:36:44 -0700 | [diff] [blame] | 90 | GR_SIGNIFICANT_POW2_DECIMAL_DIG, recipWidth, |
| 91 | GR_SIGNIFICANT_POW2_DECIMAL_DIG, recipHeight, |
jvanverth | bb4a1cf | 2015-04-07 09:06:00 -0700 | [diff] [blame] | 92 | dfTexEffect.inTextureCoords()->fName); |
| 93 | |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 94 | // Use highp to work around aliasing issues |
egdaniel | 0d3f061 | 2015-10-21 10:45:48 -0700 | [diff] [blame] | 95 | fsBuilder->codeAppend(GrGLSLShaderVar::PrecisionString(pb->glslCaps(), |
| 96 | kHigh_GrSLPrecision)); |
jvanverth | 5a105ff | 2015-02-18 11:36:35 -0800 | [diff] [blame] | 97 | fsBuilder->codeAppendf("vec2 uv = %s;\n", uv.fsIn()); |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 98 | |
| 99 | fsBuilder->codeAppend("\tfloat texColor = "); |
joshualitt | c369e7c | 2014-10-22 10:56:26 -0700 | [diff] [blame] | 100 | fsBuilder->appendTextureLookup(args.fSamplers[0], |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 101 | "uv", |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 102 | kVec2f_GrSLType); |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 103 | fsBuilder->codeAppend(".r;\n"); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 104 | fsBuilder->codeAppend("\tfloat distance = " |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 105 | SK_DistanceFieldMultiplier "*(texColor - " SK_DistanceFieldThreshold ");"); |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 106 | #ifdef SK_GAMMA_APPLY_TO_A8 |
| 107 | // adjust width based on gamma |
| 108 | fsBuilder->codeAppendf("distance -= %s;", distanceAdjustUniName); |
| 109 | #endif |
commit-bot@chromium.org | 6c89c34 | 2014-02-14 21:48:29 +0000 | [diff] [blame] | 110 | |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 111 | fsBuilder->codeAppend("float afwidth;"); |
jvanverth | bb4a1cf | 2015-04-07 09:06:00 -0700 | [diff] [blame] | 112 | if (isSimilarity) { |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 113 | // For uniform scale, we adjust for the effect of the transformation on the distance |
| 114 | // by using the length of the gradient of the texture coordinates. We use st coordinates |
jvanverth | 221360a | 2015-04-15 12:31:22 -0700 | [diff] [blame] | 115 | // to ensure we're mapping 1:1 from texel space to pixel space. |
commit-bot@chromium.org | 6c89c34 | 2014-02-14 21:48:29 +0000 | [diff] [blame] | 116 | |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 117 | // this gives us a smooth step across approximately one fragment |
jvanverth | 221360a | 2015-04-15 12:31:22 -0700 | [diff] [blame] | 118 | // we use y to work around a Mali400 bug in the x direction |
| 119 | fsBuilder->codeAppendf("afwidth = abs(" SK_DistanceFieldAAFactor "*dFdy(%s.y));", |
jvanverth | bb4a1cf | 2015-04-07 09:06:00 -0700 | [diff] [blame] | 120 | st.fsIn()); |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 121 | } else { |
| 122 | // For general transforms, to determine the amount of correction we multiply a unit |
| 123 | // vector pointing along the SDF gradient direction by the Jacobian of the st coords |
| 124 | // (which is the inverse transform for this fragment) and take the length of the result. |
| 125 | fsBuilder->codeAppend("vec2 dist_grad = vec2(dFdx(distance), dFdy(distance));"); |
jvanverth | d68a550 | 2015-03-16 12:58:43 -0700 | [diff] [blame] | 126 | // the length of the gradient may be 0, so we need to check for this |
| 127 | // this also compensates for the Adreno, which likes to drop tiles on division by 0 |
| 128 | fsBuilder->codeAppend("float dg_len2 = dot(dist_grad, dist_grad);"); |
| 129 | fsBuilder->codeAppend("if (dg_len2 < 0.0001) {"); |
| 130 | fsBuilder->codeAppend("dist_grad = vec2(0.7071, 0.7071);"); |
| 131 | fsBuilder->codeAppend("} else {"); |
| 132 | fsBuilder->codeAppend("dist_grad = dist_grad*inversesqrt(dg_len2);"); |
| 133 | fsBuilder->codeAppend("}"); |
| 134 | |
jvanverth | bb4a1cf | 2015-04-07 09:06:00 -0700 | [diff] [blame] | 135 | fsBuilder->codeAppendf("vec2 Jdx = dFdx(%s);", st.fsIn()); |
| 136 | fsBuilder->codeAppendf("vec2 Jdy = dFdy(%s);", st.fsIn()); |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 137 | fsBuilder->codeAppend("vec2 grad = vec2(dist_grad.x*Jdx.x + dist_grad.y*Jdy.x,"); |
| 138 | fsBuilder->codeAppend(" dist_grad.x*Jdx.y + dist_grad.y*Jdy.y);"); |
commit-bot@chromium.org | 4362a38 | 2014-03-26 19:49:03 +0000 | [diff] [blame] | 139 | |
| 140 | // this gives us a smooth step across approximately one fragment |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 141 | fsBuilder->codeAppend("afwidth = " SK_DistanceFieldAAFactor "*length(grad);"); |
commit-bot@chromium.org | 4362a38 | 2014-03-26 19:49:03 +0000 | [diff] [blame] | 142 | } |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 143 | fsBuilder->codeAppend("float val = smoothstep(-afwidth, afwidth, distance);"); |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 144 | |
joshualitt | 2dd1ae0 | 2014-12-03 06:24:10 -0800 | [diff] [blame] | 145 | fsBuilder->codeAppendf("%s = vec4(val);", args.fOutputCoverage); |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 146 | } |
| 147 | |
egdaniel | 018fb62 | 2015-10-28 07:26:40 -0700 | [diff] [blame] | 148 | void setData(const GrGLSLProgramDataManager& pdman, const GrPrimitiveProcessor& proc) override { |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 149 | #ifdef SK_GAMMA_APPLY_TO_A8 |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 150 | const GrDistanceFieldA8TextGeoProc& dfTexEffect = proc.cast<GrDistanceFieldA8TextGeoProc>(); |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 151 | float distanceAdjust = dfTexEffect.getDistanceAdjust(); |
| 152 | if (distanceAdjust != fDistanceAdjust) { |
| 153 | pdman.set1f(fDistanceAdjustUni, distanceAdjust); |
| 154 | fDistanceAdjust = distanceAdjust; |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 155 | } |
| 156 | #endif |
joshualitt | e578a95 | 2015-05-14 10:09:13 -0700 | [diff] [blame] | 157 | const GrDistanceFieldA8TextGeoProc& dfa8gp = proc.cast<GrDistanceFieldA8TextGeoProc>(); |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 158 | |
| 159 | if (!dfa8gp.viewMatrix().isIdentity() && !fViewMatrix.cheapEqualTo(dfa8gp.viewMatrix())) { |
| 160 | fViewMatrix = dfa8gp.viewMatrix(); |
egdaniel | 018fb62 | 2015-10-28 07:26:40 -0700 | [diff] [blame] | 161 | float viewMatrix[3 * 3]; |
egdaniel | 64c4728 | 2015-11-13 06:54:19 -0800 | [diff] [blame] | 162 | GrGLSLGetMatrix<3>(viewMatrix, fViewMatrix); |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 163 | pdman.setMatrix3f(fViewMatrixUniform, viewMatrix); |
| 164 | } |
joshualitt | ee2af95 | 2014-12-30 09:04:15 -0800 | [diff] [blame] | 165 | |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 166 | if (dfa8gp.color() != fColor && !dfa8gp.hasVertexColor()) { |
egdaniel | 018fb62 | 2015-10-28 07:26:40 -0700 | [diff] [blame] | 167 | float c[4]; |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 168 | GrColorToRGBAFloat(dfa8gp.color(), c); |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 169 | pdman.set4fv(fColorUniform, 1, c); |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 170 | fColor = dfa8gp.color(); |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 171 | } |
commit-bot@chromium.org | 8fe2ee1 | 2014-03-26 18:03:05 +0000 | [diff] [blame] | 172 | } |
| 173 | |
robertphillips | 46d36f0 | 2015-01-18 08:14:14 -0800 | [diff] [blame] | 174 | static inline void GenKey(const GrGeometryProcessor& gp, |
jvanverth | cfc1886 | 2015-04-28 08:48:20 -0700 | [diff] [blame] | 175 | const GrGLSLCaps&, |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 176 | GrProcessorKeyBuilder* b) { |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 177 | const GrDistanceFieldA8TextGeoProc& dfTexEffect = gp.cast<GrDistanceFieldA8TextGeoProc>(); |
joshualitt | 8fc6c2d | 2014-12-22 15:27:05 -0800 | [diff] [blame] | 178 | uint32_t key = dfTexEffect.getFlags(); |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 179 | key |= dfTexEffect.hasVertexColor() << 16; |
| 180 | key |= dfTexEffect.colorIgnored() << 17; |
joshualitt | e578a95 | 2015-05-14 10:09:13 -0700 | [diff] [blame] | 181 | key |= ComputePosKey(dfTexEffect.viewMatrix()) << 25; |
joshualitt | 8fc6c2d | 2014-12-22 15:27:05 -0800 | [diff] [blame] | 182 | b->add32(key); |
joshualitt | 922c8b1 | 2015-08-07 09:55:23 -0700 | [diff] [blame] | 183 | |
| 184 | // Currently we hardcode numbers to convert atlas coordinates to normalized floating point |
| 185 | SkASSERT(gp.numTextures() == 1); |
| 186 | GrTexture* atlas = gp.textureAccess(0).getTexture(); |
| 187 | SkASSERT(atlas); |
| 188 | b->add32(atlas->width()); |
| 189 | b->add32(atlas->height()); |
commit-bot@chromium.org | 4362a38 | 2014-03-26 19:49:03 +0000 | [diff] [blame] | 190 | } |
| 191 | |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 192 | private: |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 193 | SkMatrix fViewMatrix; |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 194 | GrColor fColor; |
| 195 | UniformHandle fColorUniform; |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 196 | UniformHandle fViewMatrixUniform; |
mtklein | 50282b4 | 2015-01-22 07:59:52 -0800 | [diff] [blame] | 197 | #ifdef SK_GAMMA_APPLY_TO_A8 |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 198 | float fDistanceAdjust; |
| 199 | UniformHandle fDistanceAdjustUni; |
mtklein | 50282b4 | 2015-01-22 07:59:52 -0800 | [diff] [blame] | 200 | #endif |
commit-bot@chromium.org | 6c89c34 | 2014-02-14 21:48:29 +0000 | [diff] [blame] | 201 | |
egdaniel | e659a58 | 2015-11-13 09:55:43 -0800 | [diff] [blame] | 202 | typedef GrGLSLGeometryProcessor INHERITED; |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 203 | }; |
| 204 | |
| 205 | /////////////////////////////////////////////////////////////////////////////// |
| 206 | |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 207 | GrDistanceFieldA8TextGeoProc::GrDistanceFieldA8TextGeoProc(GrColor color, |
joshualitt | 8059eb9 | 2014-12-29 15:10:07 -0800 | [diff] [blame] | 208 | const SkMatrix& viewMatrix, |
joshualitt | 2e3b3e3 | 2014-12-09 13:31:14 -0800 | [diff] [blame] | 209 | GrTexture* texture, |
commit-bot@chromium.org | 6c89c34 | 2014-02-14 21:48:29 +0000 | [diff] [blame] | 210 | const GrTextureParams& params, |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 211 | #ifdef SK_GAMMA_APPLY_TO_A8 |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 212 | float distanceAdjust, |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 213 | #endif |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 214 | uint32_t flags, |
| 215 | bool usesLocalCoords) |
joshualitt | e3ababe | 2015-05-15 07:56:07 -0700 | [diff] [blame] | 216 | : fColor(color) |
joshualitt | e578a95 | 2015-05-14 10:09:13 -0700 | [diff] [blame] | 217 | , fViewMatrix(viewMatrix) |
joshualitt | 2e3b3e3 | 2014-12-09 13:31:14 -0800 | [diff] [blame] | 218 | , fTextureAccess(texture, params) |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 219 | #ifdef SK_GAMMA_APPLY_TO_A8 |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 220 | , fDistanceAdjust(distanceAdjust) |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 221 | #endif |
joshualitt | 249af15 | 2014-09-15 11:41:13 -0700 | [diff] [blame] | 222 | , fFlags(flags & kNonLCD_DistanceFieldEffectMask) |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 223 | , fInColor(nullptr) |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 224 | , fUsesLocalCoords(usesLocalCoords) { |
jvanverth | 78f0718 | 2014-07-30 06:17:59 -0700 | [diff] [blame] | 225 | SkASSERT(!(flags & ~kNonLCD_DistanceFieldEffectMask)); |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 226 | this->initClassID<GrDistanceFieldA8TextGeoProc>(); |
senorblanco | f2539d5 | 2015-05-20 14:03:42 -0700 | [diff] [blame] | 227 | fInPosition = &this->addVertexAttrib(Attribute("inPosition", kVec2f_GrVertexAttribType, |
| 228 | kHigh_GrSLPrecision)); |
joshualitt | 2dd1ae0 | 2014-12-03 06:24:10 -0800 | [diff] [blame] | 229 | if (flags & kColorAttr_DistanceFieldEffectFlag) { |
joshualitt | 71c9260 | 2015-01-14 08:12:47 -0800 | [diff] [blame] | 230 | fInColor = &this->addVertexAttrib(Attribute("inColor", kVec4ub_GrVertexAttribType)); |
joshualitt | 2dd1ae0 | 2014-12-03 06:24:10 -0800 | [diff] [blame] | 231 | } |
joshualitt | 71c9260 | 2015-01-14 08:12:47 -0800 | [diff] [blame] | 232 | fInTextureCoords = &this->addVertexAttrib(Attribute("inTextureCoords", |
jvanverth | 5a105ff | 2015-02-18 11:36:35 -0800 | [diff] [blame] | 233 | kVec2s_GrVertexAttribType)); |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 234 | this->addTextureAccess(&fTextureAccess); |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 235 | } |
| 236 | |
egdaniel | 57d3b03 | 2015-11-13 11:57:27 -0800 | [diff] [blame^] | 237 | void GrDistanceFieldA8TextGeoProc::getGLSLProcessorKey(const GrGLSLCaps& caps, |
| 238 | GrProcessorKeyBuilder* b) const { |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame] | 239 | GrGLDistanceFieldA8TextGeoProc::GenKey(*this, caps, b); |
joshualitt | eb2a676 | 2014-12-04 11:35:33 -0800 | [diff] [blame] | 240 | } |
| 241 | |
egdaniel | 57d3b03 | 2015-11-13 11:57:27 -0800 | [diff] [blame^] | 242 | GrGLSLPrimitiveProcessor* GrDistanceFieldA8TextGeoProc::createGLSLInstance(const GrGLSLCaps&) const { |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame] | 243 | return new GrGLDistanceFieldA8TextGeoProc(); |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 244 | } |
| 245 | |
| 246 | /////////////////////////////////////////////////////////////////////////////// |
| 247 | |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 248 | GR_DEFINE_GEOMETRY_PROCESSOR_TEST(GrDistanceFieldA8TextGeoProc); |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 249 | |
bsalomon | c21b09e | 2015-08-28 18:46:56 -0700 | [diff] [blame] | 250 | const GrGeometryProcessor* GrDistanceFieldA8TextGeoProc::TestCreate(GrProcessorTestData* d) { |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 251 | int texIdx = d->fRandom->nextBool() ? GrProcessorUnitTest::kSkiaPMTextureIdx : |
| 252 | GrProcessorUnitTest::kAlphaTextureIdx; |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 253 | static const SkShader::TileMode kTileModes[] = { |
| 254 | SkShader::kClamp_TileMode, |
| 255 | SkShader::kRepeat_TileMode, |
| 256 | SkShader::kMirror_TileMode, |
| 257 | }; |
| 258 | SkShader::TileMode tileModes[] = { |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 259 | kTileModes[d->fRandom->nextULessThan(SK_ARRAY_COUNT(kTileModes))], |
| 260 | kTileModes[d->fRandom->nextULessThan(SK_ARRAY_COUNT(kTileModes))], |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 261 | }; |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 262 | GrTextureParams params(tileModes, d->fRandom->nextBool() ? GrTextureParams::kBilerp_FilterMode : |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 263 | GrTextureParams::kNone_FilterMode); |
| 264 | |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 265 | return GrDistanceFieldA8TextGeoProc::Create(GrRandomColor(d->fRandom), |
| 266 | GrTest::TestMatrix(d->fRandom), |
| 267 | d->fTextures[texIdx], params, |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 268 | #ifdef SK_GAMMA_APPLY_TO_A8 |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 269 | d->fRandom->nextF(), |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 270 | #endif |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 271 | d->fRandom->nextBool() ? |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 272 | kSimilarity_DistanceFieldEffectFlag : 0, |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 273 | d->fRandom->nextBool()); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 274 | } |
| 275 | |
| 276 | /////////////////////////////////////////////////////////////////////////////// |
| 277 | |
egdaniel | e659a58 | 2015-11-13 09:55:43 -0800 | [diff] [blame] | 278 | class GrGLDistanceFieldPathGeoProc : public GrGLSLGeometryProcessor { |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 279 | public: |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame] | 280 | GrGLDistanceFieldPathGeoProc() |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 281 | : fViewMatrix(SkMatrix::InvalidMatrix()) |
| 282 | , fColor(GrColor_ILLEGAL) |
| 283 | , fTextureSize(SkISize::Make(-1, -1)) {} |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 284 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 285 | void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override{ |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 286 | const GrDistanceFieldPathGeoProc& dfTexEffect = args.fGP.cast<GrDistanceFieldPathGeoProc>(); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 287 | |
egdaniel | 8dcdedc | 2015-11-11 06:27:20 -0800 | [diff] [blame] | 288 | GrGLSLGPBuilder* pb = args.fPB; |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 289 | GrGLSLFragmentBuilder* fsBuilder = pb->getFragmentShaderBuilder(); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 290 | SkAssertResult(fsBuilder->enableFeature( |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 291 | GrGLSLFragmentShaderBuilder::kStandardDerivatives_GLSLFeature)); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 292 | |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 293 | GrGLSLVertexBuilder* vsBuilder = pb->getVertexShaderBuilder(); |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 294 | |
| 295 | // emit attributes |
| 296 | vsBuilder->emitAttributes(dfTexEffect); |
| 297 | |
egdaniel | 8dcdedc | 2015-11-11 06:27:20 -0800 | [diff] [blame] | 298 | GrGLSLVertToFrag v(kVec2f_GrSLType); |
egdaniel | f529439 | 2015-10-21 07:14:17 -0700 | [diff] [blame] | 299 | pb->addVarying("TextureCoords", &v, kHigh_GrSLPrecision); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 300 | |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 301 | // setup pass through color |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 302 | if (!dfTexEffect.colorIgnored()) { |
| 303 | if (dfTexEffect.hasVertexColor()) { |
| 304 | pb->addPassThroughAttribute(dfTexEffect.inColor(), args.fOutputColor); |
| 305 | } else { |
| 306 | this->setupUniformColor(pb, args.fOutputColor, &fColorUniform); |
| 307 | } |
| 308 | } |
reed | e4ef1ca | 2015-02-17 18:38:38 -0800 | [diff] [blame] | 309 | vsBuilder->codeAppendf("%s = %s;", v.vsOut(), dfTexEffect.inTextureCoords()->fName); |
| 310 | |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 311 | // Setup position |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 312 | this->setupPosition(pb, gpArgs, dfTexEffect.inPosition()->fName, dfTexEffect.viewMatrix(), |
| 313 | &fViewMatrixUniform); |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 314 | |
| 315 | // emit transforms |
egdaniel | f529439 | 2015-10-21 07:14:17 -0700 | [diff] [blame] | 316 | this->emitTransforms(pb, gpArgs->fPositionVar, dfTexEffect.inPosition()->fName, |
joshualitt | e3ababe | 2015-05-15 07:56:07 -0700 | [diff] [blame] | 317 | args.fTransformsIn, args.fTransformsOut); |
joshualitt | 4973d9d | 2014-11-08 09:24:25 -0800 | [diff] [blame] | 318 | |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 319 | const char* textureSizeUniName = nullptr; |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 320 | fTextureSizeUni = pb->addUniform(GrGLSLProgramBuilder::kFragment_Visibility, |
egdaniel | f529439 | 2015-10-21 07:14:17 -0700 | [diff] [blame] | 321 | kVec2f_GrSLType, kDefault_GrSLPrecision, |
| 322 | "TextureSize", &textureSizeUniName); |
reed | e4ef1ca | 2015-02-17 18:38:38 -0800 | [diff] [blame] | 323 | |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 324 | // Use highp to work around aliasing issues |
egdaniel | 0d3f061 | 2015-10-21 10:45:48 -0700 | [diff] [blame] | 325 | fsBuilder->codeAppend(GrGLSLShaderVar::PrecisionString(pb->glslCaps(), |
| 326 | kHigh_GrSLPrecision)); |
reed | e4ef1ca | 2015-02-17 18:38:38 -0800 | [diff] [blame] | 327 | fsBuilder->codeAppendf("vec2 uv = %s;", v.fsIn()); |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 328 | |
| 329 | fsBuilder->codeAppend("float texColor = "); |
joshualitt | c369e7c | 2014-10-22 10:56:26 -0700 | [diff] [blame] | 330 | fsBuilder->appendTextureLookup(args.fSamplers[0], |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 331 | "uv", |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 332 | kVec2f_GrSLType); |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 333 | fsBuilder->codeAppend(".r;"); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 334 | fsBuilder->codeAppend("float distance = " |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 335 | SK_DistanceFieldMultiplier "*(texColor - " SK_DistanceFieldThreshold ");"); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 336 | |
egdaniel | 0d3f061 | 2015-10-21 10:45:48 -0700 | [diff] [blame] | 337 | fsBuilder->codeAppend(GrGLSLShaderVar::PrecisionString(pb->glslCaps(), |
| 338 | kHigh_GrSLPrecision)); |
reed | e4ef1ca | 2015-02-17 18:38:38 -0800 | [diff] [blame] | 339 | fsBuilder->codeAppendf("vec2 st = uv*%s;", textureSizeUniName); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 340 | fsBuilder->codeAppend("float afwidth;"); |
| 341 | if (dfTexEffect.getFlags() & kSimilarity_DistanceFieldEffectFlag) { |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 342 | // For uniform scale, we adjust for the effect of the transformation on the distance |
| 343 | // by using the length of the gradient of the texture coordinates. We use st coordinates |
| 344 | // to ensure we're mapping 1:1 from texel space to pixel space. |
| 345 | |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 346 | // this gives us a smooth step across approximately one fragment |
jvanverth | bc02735 | 2015-04-15 13:41:31 -0700 | [diff] [blame] | 347 | fsBuilder->codeAppend("afwidth = abs(" SK_DistanceFieldAAFactor "*dFdy(st.y));"); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 348 | } else { |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 349 | // For general transforms, to determine the amount of correction we multiply a unit |
| 350 | // vector pointing along the SDF gradient direction by the Jacobian of the st coords |
| 351 | // (which is the inverse transform for this fragment) and take the length of the result. |
| 352 | fsBuilder->codeAppend("vec2 dist_grad = vec2(dFdx(distance), dFdy(distance));"); |
jvanverth | d68a550 | 2015-03-16 12:58:43 -0700 | [diff] [blame] | 353 | // the length of the gradient may be 0, so we need to check for this |
| 354 | // this also compensates for the Adreno, which likes to drop tiles on division by 0 |
| 355 | fsBuilder->codeAppend("float dg_len2 = dot(dist_grad, dist_grad);"); |
| 356 | fsBuilder->codeAppend("if (dg_len2 < 0.0001) {"); |
| 357 | fsBuilder->codeAppend("dist_grad = vec2(0.7071, 0.7071);"); |
| 358 | fsBuilder->codeAppend("} else {"); |
| 359 | fsBuilder->codeAppend("dist_grad = dist_grad*inversesqrt(dg_len2);"); |
| 360 | fsBuilder->codeAppend("}"); |
| 361 | |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 362 | fsBuilder->codeAppend("vec2 Jdx = dFdx(st);"); |
| 363 | fsBuilder->codeAppend("vec2 Jdy = dFdy(st);"); |
| 364 | fsBuilder->codeAppend("vec2 grad = vec2(dist_grad.x*Jdx.x + dist_grad.y*Jdy.x,"); |
| 365 | fsBuilder->codeAppend(" dist_grad.x*Jdx.y + dist_grad.y*Jdy.y);"); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 366 | |
| 367 | // this gives us a smooth step across approximately one fragment |
| 368 | fsBuilder->codeAppend("afwidth = " SK_DistanceFieldAAFactor "*length(grad);"); |
| 369 | } |
| 370 | fsBuilder->codeAppend("float val = smoothstep(-afwidth, afwidth, distance);"); |
| 371 | |
joshualitt | 2dd1ae0 | 2014-12-03 06:24:10 -0800 | [diff] [blame] | 372 | fsBuilder->codeAppendf("%s = vec4(val);", args.fOutputCoverage); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 373 | } |
| 374 | |
egdaniel | 018fb62 | 2015-10-28 07:26:40 -0700 | [diff] [blame] | 375 | void setData(const GrGLSLProgramDataManager& pdman, const GrPrimitiveProcessor& proc) override { |
reed | e4ef1ca | 2015-02-17 18:38:38 -0800 | [diff] [blame] | 376 | SkASSERT(fTextureSizeUni.isValid()); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 377 | |
joshualitt | 87f48d9 | 2014-12-04 10:41:40 -0800 | [diff] [blame] | 378 | GrTexture* texture = proc.texture(0); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 379 | if (texture->width() != fTextureSize.width() || |
| 380 | texture->height() != fTextureSize.height()) { |
| 381 | fTextureSize = SkISize::Make(texture->width(), texture->height()); |
reed | e4ef1ca | 2015-02-17 18:38:38 -0800 | [diff] [blame] | 382 | pdman.set2f(fTextureSizeUni, |
| 383 | SkIntToScalar(fTextureSize.width()), |
| 384 | SkIntToScalar(fTextureSize.height())); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 385 | } |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 386 | |
joshualitt | e578a95 | 2015-05-14 10:09:13 -0700 | [diff] [blame] | 387 | const GrDistanceFieldPathGeoProc& dfpgp = proc.cast<GrDistanceFieldPathGeoProc>(); |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 388 | |
| 389 | if (!dfpgp.viewMatrix().isIdentity() && !fViewMatrix.cheapEqualTo(dfpgp.viewMatrix())) { |
| 390 | fViewMatrix = dfpgp.viewMatrix(); |
egdaniel | 018fb62 | 2015-10-28 07:26:40 -0700 | [diff] [blame] | 391 | float viewMatrix[3 * 3]; |
egdaniel | 64c4728 | 2015-11-13 06:54:19 -0800 | [diff] [blame] | 392 | GrGLSLGetMatrix<3>(viewMatrix, fViewMatrix); |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 393 | pdman.setMatrix3f(fViewMatrixUniform, viewMatrix); |
| 394 | } |
joshualitt | ee2af95 | 2014-12-30 09:04:15 -0800 | [diff] [blame] | 395 | |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 396 | if (dfpgp.color() != fColor) { |
egdaniel | 018fb62 | 2015-10-28 07:26:40 -0700 | [diff] [blame] | 397 | float c[4]; |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 398 | GrColorToRGBAFloat(dfpgp.color(), c); |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 399 | pdman.set4fv(fColorUniform, 1, c); |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 400 | fColor = dfpgp.color(); |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 401 | } |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 402 | } |
| 403 | |
robertphillips | 46d36f0 | 2015-01-18 08:14:14 -0800 | [diff] [blame] | 404 | static inline void GenKey(const GrGeometryProcessor& gp, |
jvanverth | cfc1886 | 2015-04-28 08:48:20 -0700 | [diff] [blame] | 405 | const GrGLSLCaps&, |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 406 | GrProcessorKeyBuilder* b) { |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 407 | const GrDistanceFieldPathGeoProc& dfTexEffect = gp.cast<GrDistanceFieldPathGeoProc>(); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 408 | |
joshualitt | 8fc6c2d | 2014-12-22 15:27:05 -0800 | [diff] [blame] | 409 | uint32_t key = dfTexEffect.getFlags(); |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 410 | key |= dfTexEffect.colorIgnored() << 16; |
| 411 | key |= dfTexEffect.hasVertexColor() << 17; |
joshualitt | e578a95 | 2015-05-14 10:09:13 -0700 | [diff] [blame] | 412 | key |= ComputePosKey(dfTexEffect.viewMatrix()) << 25; |
joshualitt | 8fc6c2d | 2014-12-22 15:27:05 -0800 | [diff] [blame] | 413 | b->add32(key); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 414 | } |
| 415 | |
| 416 | private: |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 417 | UniformHandle fColorUniform; |
reed | e4ef1ca | 2015-02-17 18:38:38 -0800 | [diff] [blame] | 418 | UniformHandle fTextureSizeUni; |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 419 | UniformHandle fViewMatrixUniform; |
| 420 | SkMatrix fViewMatrix; |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 421 | GrColor fColor; |
| 422 | SkISize fTextureSize; |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 423 | |
egdaniel | e659a58 | 2015-11-13 09:55:43 -0800 | [diff] [blame] | 424 | typedef GrGLSLGeometryProcessor INHERITED; |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 425 | }; |
| 426 | |
| 427 | /////////////////////////////////////////////////////////////////////////////// |
| 428 | |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 429 | GrDistanceFieldPathGeoProc::GrDistanceFieldPathGeoProc( |
joshualitt | 2e3b3e3 | 2014-12-09 13:31:14 -0800 | [diff] [blame] | 430 | GrColor color, |
joshualitt | 8059eb9 | 2014-12-29 15:10:07 -0800 | [diff] [blame] | 431 | const SkMatrix& viewMatrix, |
joshualitt | 2e3b3e3 | 2014-12-09 13:31:14 -0800 | [diff] [blame] | 432 | GrTexture* texture, |
| 433 | const GrTextureParams& params, |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 434 | uint32_t flags, |
| 435 | bool usesLocalCoords) |
joshualitt | e3ababe | 2015-05-15 07:56:07 -0700 | [diff] [blame] | 436 | : fColor(color) |
joshualitt | e578a95 | 2015-05-14 10:09:13 -0700 | [diff] [blame] | 437 | , fViewMatrix(viewMatrix) |
joshualitt | 2e3b3e3 | 2014-12-09 13:31:14 -0800 | [diff] [blame] | 438 | , fTextureAccess(texture, params) |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 439 | , fFlags(flags & kNonLCD_DistanceFieldEffectMask) |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 440 | , fInColor(nullptr) |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 441 | , fUsesLocalCoords(usesLocalCoords) { |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 442 | SkASSERT(!(flags & ~kNonLCD_DistanceFieldEffectMask)); |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 443 | this->initClassID<GrDistanceFieldPathGeoProc>(); |
senorblanco | f2539d5 | 2015-05-20 14:03:42 -0700 | [diff] [blame] | 444 | fInPosition = &this->addVertexAttrib(Attribute("inPosition", kVec2f_GrVertexAttribType, |
| 445 | kHigh_GrSLPrecision)); |
joshualitt | 2dd1ae0 | 2014-12-03 06:24:10 -0800 | [diff] [blame] | 446 | if (flags & kColorAttr_DistanceFieldEffectFlag) { |
joshualitt | 71c9260 | 2015-01-14 08:12:47 -0800 | [diff] [blame] | 447 | fInColor = &this->addVertexAttrib(Attribute("inColor", kVec4ub_GrVertexAttribType)); |
joshualitt | 2dd1ae0 | 2014-12-03 06:24:10 -0800 | [diff] [blame] | 448 | } |
joshualitt | 71c9260 | 2015-01-14 08:12:47 -0800 | [diff] [blame] | 449 | fInTextureCoords = &this->addVertexAttrib(Attribute("inTextureCoords", |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 450 | kVec2f_GrVertexAttribType)); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 451 | this->addTextureAccess(&fTextureAccess); |
| 452 | } |
| 453 | |
egdaniel | 57d3b03 | 2015-11-13 11:57:27 -0800 | [diff] [blame^] | 454 | void GrDistanceFieldPathGeoProc::getGLSLProcessorKey(const GrGLSLCaps& caps, |
| 455 | GrProcessorKeyBuilder* b) const { |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame] | 456 | GrGLDistanceFieldPathGeoProc::GenKey(*this, caps, b); |
joshualitt | eb2a676 | 2014-12-04 11:35:33 -0800 | [diff] [blame] | 457 | } |
| 458 | |
egdaniel | 57d3b03 | 2015-11-13 11:57:27 -0800 | [diff] [blame^] | 459 | GrGLSLPrimitiveProcessor* GrDistanceFieldPathGeoProc::createGLSLInstance(const GrGLSLCaps&) const { |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame] | 460 | return new GrGLDistanceFieldPathGeoProc(); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 461 | } |
| 462 | |
| 463 | /////////////////////////////////////////////////////////////////////////////// |
| 464 | |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 465 | GR_DEFINE_GEOMETRY_PROCESSOR_TEST(GrDistanceFieldPathGeoProc); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 466 | |
bsalomon | c21b09e | 2015-08-28 18:46:56 -0700 | [diff] [blame] | 467 | const GrGeometryProcessor* GrDistanceFieldPathGeoProc::TestCreate(GrProcessorTestData* d) { |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 468 | int texIdx = d->fRandom->nextBool() ? GrProcessorUnitTest::kSkiaPMTextureIdx |
| 469 | : GrProcessorUnitTest::kAlphaTextureIdx; |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 470 | static const SkShader::TileMode kTileModes[] = { |
| 471 | SkShader::kClamp_TileMode, |
| 472 | SkShader::kRepeat_TileMode, |
| 473 | SkShader::kMirror_TileMode, |
| 474 | }; |
| 475 | SkShader::TileMode tileModes[] = { |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 476 | kTileModes[d->fRandom->nextULessThan(SK_ARRAY_COUNT(kTileModes))], |
| 477 | kTileModes[d->fRandom->nextULessThan(SK_ARRAY_COUNT(kTileModes))], |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 478 | }; |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 479 | GrTextureParams params(tileModes, d->fRandom->nextBool() ? GrTextureParams::kBilerp_FilterMode |
| 480 | : GrTextureParams::kNone_FilterMode); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 481 | |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 482 | return GrDistanceFieldPathGeoProc::Create(GrRandomColor(d->fRandom), |
| 483 | GrTest::TestMatrix(d->fRandom), |
| 484 | d->fTextures[texIdx], |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 485 | params, |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 486 | d->fRandom->nextBool() ? |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 487 | kSimilarity_DistanceFieldEffectFlag : 0, |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 488 | d->fRandom->nextBool()); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 489 | } |
| 490 | |
| 491 | /////////////////////////////////////////////////////////////////////////////// |
| 492 | |
egdaniel | e659a58 | 2015-11-13 09:55:43 -0800 | [diff] [blame] | 493 | class GrGLDistanceFieldLCDTextGeoProc : public GrGLSLGeometryProcessor { |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 494 | public: |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame] | 495 | GrGLDistanceFieldLCDTextGeoProc() |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 496 | : fViewMatrix(SkMatrix::InvalidMatrix()), fColor(GrColor_ILLEGAL) { |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 497 | fDistanceAdjust = GrDistanceFieldLCDTextGeoProc::DistanceAdjust::Make(1.0f, 1.0f, 1.0f); |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 498 | } |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 499 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 500 | void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override{ |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 501 | const GrDistanceFieldLCDTextGeoProc& dfTexEffect = |
| 502 | args.fGP.cast<GrDistanceFieldLCDTextGeoProc>(); |
egdaniel | 8dcdedc | 2015-11-11 06:27:20 -0800 | [diff] [blame] | 503 | GrGLSLGPBuilder* pb = args.fPB; |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 504 | |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 505 | GrGLSLVertexBuilder* vsBuilder = pb->getVertexShaderBuilder(); |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 506 | |
| 507 | // emit attributes |
| 508 | vsBuilder->emitAttributes(dfTexEffect); |
| 509 | |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 510 | // setup pass through color |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 511 | if (!dfTexEffect.colorIgnored()) { |
| 512 | this->setupUniformColor(pb, args.fOutputColor, &fColorUniform); |
| 513 | } |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 514 | |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 515 | // Setup position |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 516 | this->setupPosition(pb, gpArgs, dfTexEffect.inPosition()->fName, dfTexEffect.viewMatrix(), |
| 517 | &fViewMatrixUniform); |
joshualitt | 4973d9d | 2014-11-08 09:24:25 -0800 | [diff] [blame] | 518 | |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 519 | // emit transforms |
egdaniel | f529439 | 2015-10-21 07:14:17 -0700 | [diff] [blame] | 520 | this->emitTransforms(pb, gpArgs->fPositionVar, dfTexEffect.inPosition()->fName, |
joshualitt | e3ababe | 2015-05-15 07:56:07 -0700 | [diff] [blame] | 521 | args.fTransformsIn, args.fTransformsOut); |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 522 | |
jvanverth | bb4a1cf | 2015-04-07 09:06:00 -0700 | [diff] [blame] | 523 | // set up varyings |
| 524 | bool isUniformScale = SkToBool(dfTexEffect.getFlags() & kUniformScale_DistanceFieldEffectMask); |
egdaniel | 8dcdedc | 2015-11-11 06:27:20 -0800 | [diff] [blame] | 525 | GrGLSLVertToFrag recipScale(kFloat_GrSLType); |
| 526 | GrGLSLVertToFrag st(kVec2f_GrSLType); |
egdaniel | f529439 | 2015-10-21 07:14:17 -0700 | [diff] [blame] | 527 | pb->addVarying("IntTextureCoords", &st, kHigh_GrSLPrecision); |
jvanverth | 221360a | 2015-04-15 12:31:22 -0700 | [diff] [blame] | 528 | vsBuilder->codeAppendf("%s = %s;", st.vsOut(), dfTexEffect.inTextureCoords()->fName); |
jvanverth | bb4a1cf | 2015-04-07 09:06:00 -0700 | [diff] [blame] | 529 | |
joshualitt | 922c8b1 | 2015-08-07 09:55:23 -0700 | [diff] [blame] | 530 | // compute numbers to be hardcoded to convert texture coordinates from int to float |
| 531 | SkASSERT(dfTexEffect.numTextures() == 1); |
| 532 | GrTexture* atlas = dfTexEffect.textureAccess(0).getTexture(); |
joshualitt | 7375d6b | 2015-08-07 13:36:44 -0700 | [diff] [blame] | 533 | SkASSERT(atlas && SkIsPow2(atlas->width()) && SkIsPow2(atlas->height())); |
joshualitt | 922c8b1 | 2015-08-07 09:55:23 -0700 | [diff] [blame] | 534 | SkScalar recipWidth = 1.0f / atlas->width(); |
| 535 | SkScalar recipHeight = 1.0f / atlas->height(); |
| 536 | |
egdaniel | 8dcdedc | 2015-11-11 06:27:20 -0800 | [diff] [blame] | 537 | GrGLSLVertToFrag uv(kVec2f_GrSLType); |
egdaniel | f529439 | 2015-10-21 07:14:17 -0700 | [diff] [blame] | 538 | pb->addVarying("TextureCoords", &uv, kHigh_GrSLPrecision); |
joshualitt | 922c8b1 | 2015-08-07 09:55:23 -0700 | [diff] [blame] | 539 | vsBuilder->codeAppendf("%s = vec2(%.*f, %.*f) * %s;", uv.vsOut(), |
joshualitt | 7375d6b | 2015-08-07 13:36:44 -0700 | [diff] [blame] | 540 | GR_SIGNIFICANT_POW2_DECIMAL_DIG, recipWidth, |
| 541 | GR_SIGNIFICANT_POW2_DECIMAL_DIG, recipHeight, |
jvanverth | bb4a1cf | 2015-04-07 09:06:00 -0700 | [diff] [blame] | 542 | dfTexEffect.inTextureCoords()->fName); |
| 543 | |
| 544 | // add frag shader code |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 545 | GrGLSLFragmentBuilder* fsBuilder = pb->getFragmentShaderBuilder(); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 546 | |
| 547 | SkAssertResult(fsBuilder->enableFeature( |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 548 | GrGLSLFragmentShaderBuilder::kStandardDerivatives_GLSLFeature)); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 549 | |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 550 | // create LCD offset adjusted by inverse of transform |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 551 | // Use highp to work around aliasing issues |
egdaniel | 0d3f061 | 2015-10-21 10:45:48 -0700 | [diff] [blame] | 552 | fsBuilder->codeAppend(GrGLSLShaderVar::PrecisionString(pb->glslCaps(), |
| 553 | kHigh_GrSLPrecision)); |
jvanverth | 5a105ff | 2015-02-18 11:36:35 -0800 | [diff] [blame] | 554 | fsBuilder->codeAppendf("vec2 uv = %s;\n", uv.fsIn()); |
egdaniel | 0d3f061 | 2015-10-21 10:45:48 -0700 | [diff] [blame] | 555 | fsBuilder->codeAppend(GrGLSLShaderVar::PrecisionString(pb->glslCaps(), |
| 556 | kHigh_GrSLPrecision)); |
joshualitt | 922c8b1 | 2015-08-07 09:55:23 -0700 | [diff] [blame] | 557 | |
| 558 | SkScalar lcdDelta = 1.0f / (3.0f * atlas->width()); |
jvanverth | 5a105ff | 2015-02-18 11:36:35 -0800 | [diff] [blame] | 559 | if (dfTexEffect.getFlags() & kBGR_DistanceFieldEffectFlag) { |
joshualitt | 922c8b1 | 2015-08-07 09:55:23 -0700 | [diff] [blame] | 560 | fsBuilder->codeAppendf("float delta = -%.*f;\n", SK_FLT_DECIMAL_DIG, lcdDelta); |
jvanverth | 5a105ff | 2015-02-18 11:36:35 -0800 | [diff] [blame] | 561 | } else { |
joshualitt | 922c8b1 | 2015-08-07 09:55:23 -0700 | [diff] [blame] | 562 | fsBuilder->codeAppendf("float delta = %.*f;\n", SK_FLT_DECIMAL_DIG, lcdDelta); |
jvanverth | 5a105ff | 2015-02-18 11:36:35 -0800 | [diff] [blame] | 563 | } |
jvanverth | 78f0718 | 2014-07-30 06:17:59 -0700 | [diff] [blame] | 564 | if (isUniformScale) { |
jvanverth | bc02735 | 2015-04-15 13:41:31 -0700 | [diff] [blame] | 565 | fsBuilder->codeAppendf("float dy = abs(dFdy(%s.y));", st.fsIn()); |
jvanverth | 221360a | 2015-04-15 12:31:22 -0700 | [diff] [blame] | 566 | fsBuilder->codeAppend("vec2 offset = vec2(dy*delta, 0.0);"); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 567 | } else { |
jvanverth | bb4a1cf | 2015-04-07 09:06:00 -0700 | [diff] [blame] | 568 | fsBuilder->codeAppendf("vec2 st = %s;\n", st.fsIn()); |
| 569 | |
| 570 | fsBuilder->codeAppend("vec2 Jdx = dFdx(st);"); |
| 571 | fsBuilder->codeAppend("vec2 Jdy = dFdy(st);"); |
| 572 | fsBuilder->codeAppend("vec2 offset = delta*Jdx;"); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 573 | } |
| 574 | |
| 575 | // green is distance to uv center |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 576 | fsBuilder->codeAppend("\tvec4 texColor = "); |
joshualitt | c369e7c | 2014-10-22 10:56:26 -0700 | [diff] [blame] | 577 | fsBuilder->appendTextureLookup(args.fSamplers[0], "uv", kVec2f_GrSLType); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 578 | fsBuilder->codeAppend(";\n"); |
| 579 | fsBuilder->codeAppend("\tvec3 distance;\n"); |
| 580 | fsBuilder->codeAppend("\tdistance.y = texColor.r;\n"); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 581 | // red is distance to left offset |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 582 | fsBuilder->codeAppend("\tvec2 uv_adjusted = uv - offset;\n"); |
| 583 | fsBuilder->codeAppend("\ttexColor = "); |
joshualitt | c369e7c | 2014-10-22 10:56:26 -0700 | [diff] [blame] | 584 | fsBuilder->appendTextureLookup(args.fSamplers[0], "uv_adjusted", kVec2f_GrSLType); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 585 | fsBuilder->codeAppend(";\n"); |
| 586 | fsBuilder->codeAppend("\tdistance.x = texColor.r;\n"); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 587 | // blue is distance to right offset |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 588 | fsBuilder->codeAppend("\tuv_adjusted = uv + offset;\n"); |
| 589 | fsBuilder->codeAppend("\ttexColor = "); |
joshualitt | c369e7c | 2014-10-22 10:56:26 -0700 | [diff] [blame] | 590 | fsBuilder->appendTextureLookup(args.fSamplers[0], "uv_adjusted", kVec2f_GrSLType); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 591 | fsBuilder->codeAppend(";\n"); |
| 592 | fsBuilder->codeAppend("\tdistance.z = texColor.r;\n"); |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 593 | |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 594 | fsBuilder->codeAppend("\tdistance = " |
jvanverth | ada68ef | 2014-11-03 14:00:24 -0800 | [diff] [blame] | 595 | "vec3(" SK_DistanceFieldMultiplier ")*(distance - vec3(" SK_DistanceFieldThreshold"));"); |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 596 | |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 597 | // adjust width based on gamma |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 598 | const char* distanceAdjustUniName = nullptr; |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 599 | fDistanceAdjustUni = pb->addUniform(GrGLSLProgramBuilder::kFragment_Visibility, |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 600 | kVec3f_GrSLType, kDefault_GrSLPrecision, |
| 601 | "DistanceAdjust", &distanceAdjustUniName); |
| 602 | fsBuilder->codeAppendf("distance -= %s;", distanceAdjustUniName); |
| 603 | |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 604 | // To be strictly correct, we should compute the anti-aliasing factor separately |
| 605 | // for each color component. However, this is only important when using perspective |
| 606 | // transformations, and even then using a single factor seems like a reasonable |
| 607 | // trade-off between quality and speed. |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 608 | fsBuilder->codeAppend("float afwidth;"); |
jvanverth | 78f0718 | 2014-07-30 06:17:59 -0700 | [diff] [blame] | 609 | if (isUniformScale) { |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 610 | // For uniform scale, we adjust for the effect of the transformation on the distance |
| 611 | // by using the length of the gradient of the texture coordinates. We use st coordinates |
| 612 | // to ensure we're mapping 1:1 from texel space to pixel space. |
| 613 | |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 614 | // this gives us a smooth step across approximately one fragment |
jvanverth | bc02735 | 2015-04-15 13:41:31 -0700 | [diff] [blame] | 615 | fsBuilder->codeAppend("afwidth = " SK_DistanceFieldAAFactor "*dy;"); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 616 | } else { |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 617 | // For general transforms, to determine the amount of correction we multiply a unit |
| 618 | // vector pointing along the SDF gradient direction by the Jacobian of the st coords |
| 619 | // (which is the inverse transform for this fragment) and take the length of the result. |
| 620 | fsBuilder->codeAppend("vec2 dist_grad = vec2(dFdx(distance.r), dFdy(distance.r));"); |
jvanverth | d68a550 | 2015-03-16 12:58:43 -0700 | [diff] [blame] | 621 | // the length of the gradient may be 0, so we need to check for this |
| 622 | // this also compensates for the Adreno, which likes to drop tiles on division by 0 |
| 623 | fsBuilder->codeAppend("float dg_len2 = dot(dist_grad, dist_grad);"); |
| 624 | fsBuilder->codeAppend("if (dg_len2 < 0.0001) {"); |
| 625 | fsBuilder->codeAppend("dist_grad = vec2(0.7071, 0.7071);"); |
| 626 | fsBuilder->codeAppend("} else {"); |
| 627 | fsBuilder->codeAppend("dist_grad = dist_grad*inversesqrt(dg_len2);"); |
| 628 | fsBuilder->codeAppend("}"); |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 629 | fsBuilder->codeAppend("vec2 grad = vec2(dist_grad.x*Jdx.x + dist_grad.y*Jdy.x,"); |
| 630 | fsBuilder->codeAppend(" dist_grad.x*Jdx.y + dist_grad.y*Jdy.y);"); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 631 | |
| 632 | // this gives us a smooth step across approximately one fragment |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 633 | fsBuilder->codeAppend("afwidth = " SK_DistanceFieldAAFactor "*length(grad);"); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 634 | } |
| 635 | |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 636 | fsBuilder->codeAppend( |
| 637 | "vec4 val = vec4(smoothstep(vec3(-afwidth), vec3(afwidth), distance), 1.0);"); |
egdaniel | 27b6335 | 2015-09-15 13:13:50 -0700 | [diff] [blame] | 638 | // set alpha to be max of rgb coverage |
| 639 | fsBuilder->codeAppend("val.a = max(max(val.r, val.g), val.b);"); |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 640 | |
egdaniel | 27b6335 | 2015-09-15 13:13:50 -0700 | [diff] [blame] | 641 | fsBuilder->codeAppendf("%s = val;", args.fOutputCoverage); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 642 | } |
| 643 | |
egdaniel | 018fb62 | 2015-10-28 07:26:40 -0700 | [diff] [blame] | 644 | void setData(const GrGLSLProgramDataManager& pdman, |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame] | 645 | const GrPrimitiveProcessor& processor) override { |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 646 | SkASSERT(fDistanceAdjustUni.isValid()); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 647 | |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 648 | const GrDistanceFieldLCDTextGeoProc& dflcd = processor.cast<GrDistanceFieldLCDTextGeoProc>(); |
| 649 | GrDistanceFieldLCDTextGeoProc::DistanceAdjust wa = dflcd.getDistanceAdjust(); |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 650 | if (wa != fDistanceAdjust) { |
| 651 | pdman.set3f(fDistanceAdjustUni, |
| 652 | wa.fR, |
| 653 | wa.fG, |
| 654 | wa.fB); |
| 655 | fDistanceAdjust = wa; |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 656 | } |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 657 | |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 658 | if (!dflcd.viewMatrix().isIdentity() && !fViewMatrix.cheapEqualTo(dflcd.viewMatrix())) { |
| 659 | fViewMatrix = dflcd.viewMatrix(); |
egdaniel | 018fb62 | 2015-10-28 07:26:40 -0700 | [diff] [blame] | 660 | float viewMatrix[3 * 3]; |
egdaniel | 64c4728 | 2015-11-13 06:54:19 -0800 | [diff] [blame] | 661 | GrGLSLGetMatrix<3>(viewMatrix, fViewMatrix); |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 662 | pdman.setMatrix3f(fViewMatrixUniform, viewMatrix); |
| 663 | } |
joshualitt | ee2af95 | 2014-12-30 09:04:15 -0800 | [diff] [blame] | 664 | |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 665 | if (dflcd.color() != fColor) { |
egdaniel | 018fb62 | 2015-10-28 07:26:40 -0700 | [diff] [blame] | 666 | float c[4]; |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 667 | GrColorToRGBAFloat(dflcd.color(), c); |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 668 | pdman.set4fv(fColorUniform, 1, c); |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 669 | fColor = dflcd.color(); |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 670 | } |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 671 | } |
| 672 | |
robertphillips | 46d36f0 | 2015-01-18 08:14:14 -0800 | [diff] [blame] | 673 | static inline void GenKey(const GrGeometryProcessor& gp, |
jvanverth | cfc1886 | 2015-04-28 08:48:20 -0700 | [diff] [blame] | 674 | const GrGLSLCaps&, |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 675 | GrProcessorKeyBuilder* b) { |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 676 | const GrDistanceFieldLCDTextGeoProc& dfTexEffect = gp.cast<GrDistanceFieldLCDTextGeoProc>(); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 677 | |
joshualitt | 8fc6c2d | 2014-12-22 15:27:05 -0800 | [diff] [blame] | 678 | uint32_t key = dfTexEffect.getFlags(); |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 679 | key |= dfTexEffect.colorIgnored() << 16; |
joshualitt | e578a95 | 2015-05-14 10:09:13 -0700 | [diff] [blame] | 680 | key |= ComputePosKey(dfTexEffect.viewMatrix()) << 25; |
joshualitt | 8fc6c2d | 2014-12-22 15:27:05 -0800 | [diff] [blame] | 681 | b->add32(key); |
joshualitt | 922c8b1 | 2015-08-07 09:55:23 -0700 | [diff] [blame] | 682 | |
| 683 | // Currently we hardcode numbers to convert atlas coordinates to normalized floating point |
| 684 | SkASSERT(gp.numTextures() == 1); |
| 685 | GrTexture* atlas = gp.textureAccess(0).getTexture(); |
| 686 | SkASSERT(atlas); |
| 687 | b->add32(atlas->width()); |
| 688 | b->add32(atlas->height()); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 689 | } |
| 690 | |
| 691 | private: |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 692 | SkMatrix fViewMatrix; |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 693 | GrColor fColor; |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 694 | UniformHandle fViewMatrixUniform; |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 695 | UniformHandle fColorUniform; |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 696 | GrDistanceFieldLCDTextGeoProc::DistanceAdjust fDistanceAdjust; |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 697 | UniformHandle fDistanceAdjustUni; |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 698 | |
egdaniel | e659a58 | 2015-11-13 09:55:43 -0800 | [diff] [blame] | 699 | typedef GrGLSLGeometryProcessor INHERITED; |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 700 | }; |
| 701 | |
| 702 | /////////////////////////////////////////////////////////////////////////////// |
| 703 | |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 704 | GrDistanceFieldLCDTextGeoProc::GrDistanceFieldLCDTextGeoProc( |
joshualitt | 8059eb9 | 2014-12-29 15:10:07 -0800 | [diff] [blame] | 705 | GrColor color, const SkMatrix& viewMatrix, |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 706 | GrTexture* texture, const GrTextureParams& params, |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 707 | DistanceAdjust distanceAdjust, |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 708 | uint32_t flags, bool usesLocalCoords) |
joshualitt | e3ababe | 2015-05-15 07:56:07 -0700 | [diff] [blame] | 709 | : fColor(color) |
joshualitt | e578a95 | 2015-05-14 10:09:13 -0700 | [diff] [blame] | 710 | , fViewMatrix(viewMatrix) |
joshualitt | 2e3b3e3 | 2014-12-09 13:31:14 -0800 | [diff] [blame] | 711 | , fTextureAccess(texture, params) |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 712 | , fDistanceAdjust(distanceAdjust) |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 713 | , fFlags(flags & kLCD_DistanceFieldEffectMask) |
| 714 | , fUsesLocalCoords(usesLocalCoords) { |
jvanverth | 78f0718 | 2014-07-30 06:17:59 -0700 | [diff] [blame] | 715 | SkASSERT(!(flags & ~kLCD_DistanceFieldEffectMask) && (flags & kUseLCD_DistanceFieldEffectFlag)); |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 716 | this->initClassID<GrDistanceFieldLCDTextGeoProc>(); |
senorblanco | f2539d5 | 2015-05-20 14:03:42 -0700 | [diff] [blame] | 717 | fInPosition = &this->addVertexAttrib(Attribute("inPosition", kVec2f_GrVertexAttribType, |
| 718 | kHigh_GrSLPrecision)); |
joshualitt | 71c9260 | 2015-01-14 08:12:47 -0800 | [diff] [blame] | 719 | fInTextureCoords = &this->addVertexAttrib(Attribute("inTextureCoords", |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 720 | kVec2s_GrVertexAttribType)); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 721 | this->addTextureAccess(&fTextureAccess); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 722 | } |
| 723 | |
egdaniel | 57d3b03 | 2015-11-13 11:57:27 -0800 | [diff] [blame^] | 724 | void GrDistanceFieldLCDTextGeoProc::getGLSLProcessorKey(const GrGLSLCaps& caps, |
| 725 | GrProcessorKeyBuilder* b) const { |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame] | 726 | GrGLDistanceFieldLCDTextGeoProc::GenKey(*this, caps, b); |
joshualitt | eb2a676 | 2014-12-04 11:35:33 -0800 | [diff] [blame] | 727 | } |
| 728 | |
egdaniel | 57d3b03 | 2015-11-13 11:57:27 -0800 | [diff] [blame^] | 729 | GrGLSLPrimitiveProcessor* GrDistanceFieldLCDTextGeoProc::createGLSLInstance(const GrGLSLCaps&) const { |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame] | 730 | return new GrGLDistanceFieldLCDTextGeoProc(); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 731 | } |
| 732 | |
| 733 | /////////////////////////////////////////////////////////////////////////////// |
| 734 | |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 735 | GR_DEFINE_GEOMETRY_PROCESSOR_TEST(GrDistanceFieldLCDTextGeoProc); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 736 | |
bsalomon | c21b09e | 2015-08-28 18:46:56 -0700 | [diff] [blame] | 737 | const GrGeometryProcessor* GrDistanceFieldLCDTextGeoProc::TestCreate(GrProcessorTestData* d) { |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 738 | int texIdx = d->fRandom->nextBool() ? GrProcessorUnitTest::kSkiaPMTextureIdx : |
| 739 | GrProcessorUnitTest::kAlphaTextureIdx; |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 740 | static const SkShader::TileMode kTileModes[] = { |
| 741 | SkShader::kClamp_TileMode, |
| 742 | SkShader::kRepeat_TileMode, |
| 743 | SkShader::kMirror_TileMode, |
| 744 | }; |
| 745 | SkShader::TileMode tileModes[] = { |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 746 | kTileModes[d->fRandom->nextULessThan(SK_ARRAY_COUNT(kTileModes))], |
| 747 | kTileModes[d->fRandom->nextULessThan(SK_ARRAY_COUNT(kTileModes))], |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 748 | }; |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 749 | GrTextureParams params(tileModes, d->fRandom->nextBool() ? GrTextureParams::kBilerp_FilterMode : |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 750 | GrTextureParams::kNone_FilterMode); |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 751 | DistanceAdjust wa = { 0.0f, 0.1f, -0.1f }; |
jvanverth | 78f0718 | 2014-07-30 06:17:59 -0700 | [diff] [blame] | 752 | uint32_t flags = kUseLCD_DistanceFieldEffectFlag; |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 753 | flags |= d->fRandom->nextBool() ? kUniformScale_DistanceFieldEffectMask : 0; |
| 754 | flags |= d->fRandom->nextBool() ? kBGR_DistanceFieldEffectFlag : 0; |
| 755 | return GrDistanceFieldLCDTextGeoProc::Create(GrRandomColor(d->fRandom), |
| 756 | GrTest::TestMatrix(d->fRandom), |
| 757 | d->fTextures[texIdx], params, |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 758 | wa, |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 759 | flags, |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 760 | d->fRandom->nextBool()); |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 761 | } |