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 | |
wangyix | 6af0c93 | 2015-07-22 10:21:17 -0700 | [diff] [blame] | 14 | #include "gl/GrGLFragmentProcessor.h" |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 15 | #include "gl/GrGLTexture.h" |
joshualitt | 249af15 | 2014-09-15 11:41:13 -0700 | [diff] [blame] | 16 | #include "gl/GrGLGeometryProcessor.h" |
joshualitt | eb2a676 | 2014-12-04 11:35:33 -0800 | [diff] [blame] | 17 | #include "gl/builders/GrGLProgramBuilder.h" |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 18 | |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 19 | // Assuming a radius of a little less than the diagonal of the fragment |
jvanverth | 24ba008 | 2015-03-19 11:34:13 -0700 | [diff] [blame] | 20 | #define SK_DistanceFieldAAFactor "0.65" |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 21 | |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 22 | class GrGLDistanceFieldA8TextGeoProc : public GrGLGeometryProcessor { |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 23 | public: |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame^] | 24 | GrGLDistanceFieldA8TextGeoProc() |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 25 | : fViewMatrix(SkMatrix::InvalidMatrix()) |
| 26 | , fColor(GrColor_ILLEGAL) |
jvanverth | 9564ce6 | 2014-09-16 05:45:19 -0700 | [diff] [blame] | 27 | #ifdef SK_GAMMA_APPLY_TO_A8 |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 28 | , fDistanceAdjust(-1.0f) |
jvanverth | 9564ce6 | 2014-09-16 05:45:19 -0700 | [diff] [blame] | 29 | #endif |
| 30 | {} |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 31 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 32 | void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override{ |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 33 | const GrDistanceFieldA8TextGeoProc& dfTexEffect = |
| 34 | args.fGP.cast<GrDistanceFieldA8TextGeoProc>(); |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 35 | GrGLGPBuilder* pb = args.fPB; |
egdaniel | 29bee0f | 2015-04-29 11:54:42 -0700 | [diff] [blame] | 36 | GrGLFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder(); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 37 | SkAssertResult(fsBuilder->enableFeature( |
| 38 | GrGLFragmentShaderBuilder::kStandardDerivatives_GLSLFeature)); |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 39 | |
joshualitt | 2dd1ae0 | 2014-12-03 06:24:10 -0800 | [diff] [blame] | 40 | GrGLVertexBuilder* vsBuilder = args.fPB->getVertexShaderBuilder(); |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 41 | |
| 42 | // emit attributes |
| 43 | vsBuilder->emitAttributes(dfTexEffect); |
| 44 | |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 45 | #ifdef SK_GAMMA_APPLY_TO_A8 |
| 46 | // adjust based on gamma |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 47 | const char* distanceAdjustUniName = nullptr; |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 48 | // width, height, 1/(3*width) |
| 49 | fDistanceAdjustUni = args.fPB->addUniform(GrGLProgramBuilder::kFragment_Visibility, |
| 50 | kFloat_GrSLType, kDefault_GrSLPrecision, |
| 51 | "DistanceAdjust", &distanceAdjustUniName); |
| 52 | #endif |
commit-bot@chromium.org | 6c89c34 | 2014-02-14 21:48:29 +0000 | [diff] [blame] | 53 | |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 54 | // Setup pass through color |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 55 | if (!dfTexEffect.colorIgnored()) { |
| 56 | if (dfTexEffect.hasVertexColor()) { |
| 57 | pb->addPassThroughAttribute(dfTexEffect.inColor(), args.fOutputColor); |
| 58 | } else { |
| 59 | this->setupUniformColor(pb, args.fOutputColor, &fColorUniform); |
| 60 | } |
| 61 | } |
commit-bot@chromium.org | 6c89c34 | 2014-02-14 21:48:29 +0000 | [diff] [blame] | 62 | |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 63 | // Setup position |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 64 | this->setupPosition(pb, gpArgs, dfTexEffect.inPosition()->fName, dfTexEffect.viewMatrix(), |
| 65 | &fViewMatrixUniform); |
joshualitt | 2dd1ae0 | 2014-12-03 06:24:10 -0800 | [diff] [blame] | 66 | |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 67 | // emit transforms |
robertphillips | 46d36f0 | 2015-01-18 08:14:14 -0800 | [diff] [blame] | 68 | this->emitTransforms(args.fPB, gpArgs->fPositionVar, dfTexEffect.inPosition()->fName, |
joshualitt | e3ababe | 2015-05-15 07:56:07 -0700 | [diff] [blame] | 69 | args.fTransformsIn, args.fTransformsOut); |
joshualitt | 4973d9d | 2014-11-08 09:24:25 -0800 | [diff] [blame] | 70 | |
jvanverth | bb4a1cf | 2015-04-07 09:06:00 -0700 | [diff] [blame] | 71 | // add varyings |
| 72 | GrGLVertToFrag recipScale(kFloat_GrSLType); |
| 73 | GrGLVertToFrag st(kVec2f_GrSLType); |
| 74 | bool isSimilarity = SkToBool(dfTexEffect.getFlags() & kSimilarity_DistanceFieldEffectFlag); |
jvanverth | 221360a | 2015-04-15 12:31:22 -0700 | [diff] [blame] | 75 | args.fPB->addVarying("IntTextureCoords", &st, kHigh_GrSLPrecision); |
| 76 | vsBuilder->codeAppendf("%s = %s;", st.vsOut(), dfTexEffect.inTextureCoords()->fName); |
jvanverth | bb4a1cf | 2015-04-07 09:06:00 -0700 | [diff] [blame] | 77 | |
joshualitt | 922c8b1 | 2015-08-07 09:55:23 -0700 | [diff] [blame] | 78 | // compute numbers to be hardcoded to convert texture coordinates from int to float |
| 79 | SkASSERT(dfTexEffect.numTextures() == 1); |
| 80 | GrTexture* atlas = dfTexEffect.textureAccess(0).getTexture(); |
joshualitt | 7375d6b | 2015-08-07 13:36:44 -0700 | [diff] [blame] | 81 | SkASSERT(atlas && SkIsPow2(atlas->width()) && SkIsPow2(atlas->height())); |
joshualitt | 922c8b1 | 2015-08-07 09:55:23 -0700 | [diff] [blame] | 82 | SkScalar recipWidth = 1.0f / atlas->width(); |
| 83 | SkScalar recipHeight = 1.0f / atlas->height(); |
| 84 | |
jvanverth | bb4a1cf | 2015-04-07 09:06:00 -0700 | [diff] [blame] | 85 | GrGLVertToFrag uv(kVec2f_GrSLType); |
| 86 | args.fPB->addVarying("TextureCoords", &uv, kHigh_GrSLPrecision); |
joshualitt | 922c8b1 | 2015-08-07 09:55:23 -0700 | [diff] [blame] | 87 | vsBuilder->codeAppendf("%s = vec2(%.*f, %.*f) * %s;", uv.vsOut(), |
joshualitt | 7375d6b | 2015-08-07 13:36:44 -0700 | [diff] [blame] | 88 | GR_SIGNIFICANT_POW2_DECIMAL_DIG, recipWidth, |
| 89 | GR_SIGNIFICANT_POW2_DECIMAL_DIG, recipHeight, |
jvanverth | bb4a1cf | 2015-04-07 09:06:00 -0700 | [diff] [blame] | 90 | dfTexEffect.inTextureCoords()->fName); |
| 91 | |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 92 | // Use highp to work around aliasing issues |
| 93 | fsBuilder->codeAppend(GrGLShaderVar::PrecisionString(kHigh_GrSLPrecision, |
| 94 | pb->ctxInfo().standard())); |
jvanverth | 5a105ff | 2015-02-18 11:36:35 -0800 | [diff] [blame] | 95 | fsBuilder->codeAppendf("vec2 uv = %s;\n", uv.fsIn()); |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 96 | |
| 97 | fsBuilder->codeAppend("\tfloat texColor = "); |
joshualitt | c369e7c | 2014-10-22 10:56:26 -0700 | [diff] [blame] | 98 | fsBuilder->appendTextureLookup(args.fSamplers[0], |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 99 | "uv", |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 100 | kVec2f_GrSLType); |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 101 | fsBuilder->codeAppend(".r;\n"); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 102 | fsBuilder->codeAppend("\tfloat distance = " |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 103 | SK_DistanceFieldMultiplier "*(texColor - " SK_DistanceFieldThreshold ");"); |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 104 | #ifdef SK_GAMMA_APPLY_TO_A8 |
| 105 | // adjust width based on gamma |
| 106 | fsBuilder->codeAppendf("distance -= %s;", distanceAdjustUniName); |
| 107 | #endif |
commit-bot@chromium.org | 6c89c34 | 2014-02-14 21:48:29 +0000 | [diff] [blame] | 108 | |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 109 | fsBuilder->codeAppend("float afwidth;"); |
jvanverth | bb4a1cf | 2015-04-07 09:06:00 -0700 | [diff] [blame] | 110 | if (isSimilarity) { |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 111 | // For uniform scale, we adjust for the effect of the transformation on the distance |
| 112 | // 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] | 113 | // 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] | 114 | |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 115 | // this gives us a smooth step across approximately one fragment |
jvanverth | 221360a | 2015-04-15 12:31:22 -0700 | [diff] [blame] | 116 | // we use y to work around a Mali400 bug in the x direction |
| 117 | fsBuilder->codeAppendf("afwidth = abs(" SK_DistanceFieldAAFactor "*dFdy(%s.y));", |
jvanverth | bb4a1cf | 2015-04-07 09:06:00 -0700 | [diff] [blame] | 118 | st.fsIn()); |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 119 | } else { |
| 120 | // For general transforms, to determine the amount of correction we multiply a unit |
| 121 | // vector pointing along the SDF gradient direction by the Jacobian of the st coords |
| 122 | // (which is the inverse transform for this fragment) and take the length of the result. |
| 123 | fsBuilder->codeAppend("vec2 dist_grad = vec2(dFdx(distance), dFdy(distance));"); |
jvanverth | d68a550 | 2015-03-16 12:58:43 -0700 | [diff] [blame] | 124 | // the length of the gradient may be 0, so we need to check for this |
| 125 | // this also compensates for the Adreno, which likes to drop tiles on division by 0 |
| 126 | fsBuilder->codeAppend("float dg_len2 = dot(dist_grad, dist_grad);"); |
| 127 | fsBuilder->codeAppend("if (dg_len2 < 0.0001) {"); |
| 128 | fsBuilder->codeAppend("dist_grad = vec2(0.7071, 0.7071);"); |
| 129 | fsBuilder->codeAppend("} else {"); |
| 130 | fsBuilder->codeAppend("dist_grad = dist_grad*inversesqrt(dg_len2);"); |
| 131 | fsBuilder->codeAppend("}"); |
| 132 | |
jvanverth | bb4a1cf | 2015-04-07 09:06:00 -0700 | [diff] [blame] | 133 | fsBuilder->codeAppendf("vec2 Jdx = dFdx(%s);", st.fsIn()); |
| 134 | fsBuilder->codeAppendf("vec2 Jdy = dFdy(%s);", st.fsIn()); |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 135 | fsBuilder->codeAppend("vec2 grad = vec2(dist_grad.x*Jdx.x + dist_grad.y*Jdy.x,"); |
| 136 | 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] | 137 | |
| 138 | // this gives us a smooth step across approximately one fragment |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 139 | fsBuilder->codeAppend("afwidth = " SK_DistanceFieldAAFactor "*length(grad);"); |
commit-bot@chromium.org | 4362a38 | 2014-03-26 19:49:03 +0000 | [diff] [blame] | 140 | } |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 141 | fsBuilder->codeAppend("float val = smoothstep(-afwidth, afwidth, distance);"); |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 142 | |
joshualitt | 2dd1ae0 | 2014-12-03 06:24:10 -0800 | [diff] [blame] | 143 | fsBuilder->codeAppendf("%s = vec4(val);", args.fOutputCoverage); |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 144 | } |
| 145 | |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame^] | 146 | void setData(const GrGLProgramDataManager& pdman, const GrPrimitiveProcessor& proc) override { |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 147 | #ifdef SK_GAMMA_APPLY_TO_A8 |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 148 | const GrDistanceFieldA8TextGeoProc& dfTexEffect = proc.cast<GrDistanceFieldA8TextGeoProc>(); |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 149 | float distanceAdjust = dfTexEffect.getDistanceAdjust(); |
| 150 | if (distanceAdjust != fDistanceAdjust) { |
| 151 | pdman.set1f(fDistanceAdjustUni, distanceAdjust); |
| 152 | fDistanceAdjust = distanceAdjust; |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 153 | } |
| 154 | #endif |
joshualitt | e578a95 | 2015-05-14 10:09:13 -0700 | [diff] [blame] | 155 | const GrDistanceFieldA8TextGeoProc& dfa8gp = proc.cast<GrDistanceFieldA8TextGeoProc>(); |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 156 | |
| 157 | if (!dfa8gp.viewMatrix().isIdentity() && !fViewMatrix.cheapEqualTo(dfa8gp.viewMatrix())) { |
| 158 | fViewMatrix = dfa8gp.viewMatrix(); |
| 159 | GrGLfloat viewMatrix[3 * 3]; |
| 160 | GrGLGetMatrix<3>(viewMatrix, fViewMatrix); |
| 161 | pdman.setMatrix3f(fViewMatrixUniform, viewMatrix); |
| 162 | } |
joshualitt | ee2af95 | 2014-12-30 09:04:15 -0800 | [diff] [blame] | 163 | |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 164 | if (dfa8gp.color() != fColor && !dfa8gp.hasVertexColor()) { |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 165 | GrGLfloat c[4]; |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 166 | GrColorToRGBAFloat(dfa8gp.color(), c); |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 167 | pdman.set4fv(fColorUniform, 1, c); |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 168 | fColor = dfa8gp.color(); |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 169 | } |
commit-bot@chromium.org | 8fe2ee1 | 2014-03-26 18:03:05 +0000 | [diff] [blame] | 170 | } |
| 171 | |
robertphillips | 46d36f0 | 2015-01-18 08:14:14 -0800 | [diff] [blame] | 172 | static inline void GenKey(const GrGeometryProcessor& gp, |
jvanverth | cfc1886 | 2015-04-28 08:48:20 -0700 | [diff] [blame] | 173 | const GrGLSLCaps&, |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 174 | GrProcessorKeyBuilder* b) { |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 175 | const GrDistanceFieldA8TextGeoProc& dfTexEffect = gp.cast<GrDistanceFieldA8TextGeoProc>(); |
joshualitt | 8fc6c2d | 2014-12-22 15:27:05 -0800 | [diff] [blame] | 176 | uint32_t key = dfTexEffect.getFlags(); |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 177 | key |= dfTexEffect.hasVertexColor() << 16; |
| 178 | key |= dfTexEffect.colorIgnored() << 17; |
joshualitt | e578a95 | 2015-05-14 10:09:13 -0700 | [diff] [blame] | 179 | key |= ComputePosKey(dfTexEffect.viewMatrix()) << 25; |
joshualitt | 8fc6c2d | 2014-12-22 15:27:05 -0800 | [diff] [blame] | 180 | b->add32(key); |
joshualitt | 922c8b1 | 2015-08-07 09:55:23 -0700 | [diff] [blame] | 181 | |
| 182 | // Currently we hardcode numbers to convert atlas coordinates to normalized floating point |
| 183 | SkASSERT(gp.numTextures() == 1); |
| 184 | GrTexture* atlas = gp.textureAccess(0).getTexture(); |
| 185 | SkASSERT(atlas); |
| 186 | b->add32(atlas->width()); |
| 187 | b->add32(atlas->height()); |
commit-bot@chromium.org | 4362a38 | 2014-03-26 19:49:03 +0000 | [diff] [blame] | 188 | } |
| 189 | |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 190 | private: |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 191 | SkMatrix fViewMatrix; |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 192 | GrColor fColor; |
| 193 | UniformHandle fColorUniform; |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 194 | UniformHandle fViewMatrixUniform; |
mtklein | 50282b4 | 2015-01-22 07:59:52 -0800 | [diff] [blame] | 195 | #ifdef SK_GAMMA_APPLY_TO_A8 |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 196 | float fDistanceAdjust; |
| 197 | UniformHandle fDistanceAdjustUni; |
mtklein | 50282b4 | 2015-01-22 07:59:52 -0800 | [diff] [blame] | 198 | #endif |
commit-bot@chromium.org | 6c89c34 | 2014-02-14 21:48:29 +0000 | [diff] [blame] | 199 | |
joshualitt | 249af15 | 2014-09-15 11:41:13 -0700 | [diff] [blame] | 200 | typedef GrGLGeometryProcessor INHERITED; |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 201 | }; |
| 202 | |
| 203 | /////////////////////////////////////////////////////////////////////////////// |
| 204 | |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 205 | GrDistanceFieldA8TextGeoProc::GrDistanceFieldA8TextGeoProc(GrColor color, |
joshualitt | 8059eb9 | 2014-12-29 15:10:07 -0800 | [diff] [blame] | 206 | const SkMatrix& viewMatrix, |
joshualitt | 2e3b3e3 | 2014-12-09 13:31:14 -0800 | [diff] [blame] | 207 | GrTexture* texture, |
commit-bot@chromium.org | 6c89c34 | 2014-02-14 21:48:29 +0000 | [diff] [blame] | 208 | const GrTextureParams& params, |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 209 | #ifdef SK_GAMMA_APPLY_TO_A8 |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 210 | float distanceAdjust, |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 211 | #endif |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 212 | uint32_t flags, |
| 213 | bool usesLocalCoords) |
joshualitt | e3ababe | 2015-05-15 07:56:07 -0700 | [diff] [blame] | 214 | : fColor(color) |
joshualitt | e578a95 | 2015-05-14 10:09:13 -0700 | [diff] [blame] | 215 | , fViewMatrix(viewMatrix) |
joshualitt | 2e3b3e3 | 2014-12-09 13:31:14 -0800 | [diff] [blame] | 216 | , fTextureAccess(texture, params) |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 217 | #ifdef SK_GAMMA_APPLY_TO_A8 |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 218 | , fDistanceAdjust(distanceAdjust) |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 219 | #endif |
joshualitt | 249af15 | 2014-09-15 11:41:13 -0700 | [diff] [blame] | 220 | , fFlags(flags & kNonLCD_DistanceFieldEffectMask) |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 221 | , fInColor(nullptr) |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 222 | , fUsesLocalCoords(usesLocalCoords) { |
jvanverth | 78f0718 | 2014-07-30 06:17:59 -0700 | [diff] [blame] | 223 | SkASSERT(!(flags & ~kNonLCD_DistanceFieldEffectMask)); |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 224 | this->initClassID<GrDistanceFieldA8TextGeoProc>(); |
senorblanco | f2539d5 | 2015-05-20 14:03:42 -0700 | [diff] [blame] | 225 | fInPosition = &this->addVertexAttrib(Attribute("inPosition", kVec2f_GrVertexAttribType, |
| 226 | kHigh_GrSLPrecision)); |
joshualitt | 2dd1ae0 | 2014-12-03 06:24:10 -0800 | [diff] [blame] | 227 | if (flags & kColorAttr_DistanceFieldEffectFlag) { |
joshualitt | 71c9260 | 2015-01-14 08:12:47 -0800 | [diff] [blame] | 228 | fInColor = &this->addVertexAttrib(Attribute("inColor", kVec4ub_GrVertexAttribType)); |
joshualitt | 2dd1ae0 | 2014-12-03 06:24:10 -0800 | [diff] [blame] | 229 | } |
joshualitt | 71c9260 | 2015-01-14 08:12:47 -0800 | [diff] [blame] | 230 | fInTextureCoords = &this->addVertexAttrib(Attribute("inTextureCoords", |
jvanverth | 5a105ff | 2015-02-18 11:36:35 -0800 | [diff] [blame] | 231 | kVec2s_GrVertexAttribType)); |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 232 | this->addTextureAccess(&fTextureAccess); |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 233 | } |
| 234 | |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame^] | 235 | void GrDistanceFieldA8TextGeoProc::getGLProcessorKey(const GrGLSLCaps& caps, |
joshualitt | eb2a676 | 2014-12-04 11:35:33 -0800 | [diff] [blame] | 236 | GrProcessorKeyBuilder* b) const { |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame^] | 237 | GrGLDistanceFieldA8TextGeoProc::GenKey(*this, caps, b); |
joshualitt | eb2a676 | 2014-12-04 11:35:33 -0800 | [diff] [blame] | 238 | } |
| 239 | |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame^] | 240 | GrGLPrimitiveProcessor* GrDistanceFieldA8TextGeoProc::createGLInstance(const GrGLSLCaps&) const { |
| 241 | return new GrGLDistanceFieldA8TextGeoProc(); |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 242 | } |
| 243 | |
| 244 | /////////////////////////////////////////////////////////////////////////////// |
| 245 | |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 246 | GR_DEFINE_GEOMETRY_PROCESSOR_TEST(GrDistanceFieldA8TextGeoProc); |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 247 | |
bsalomon | c21b09e | 2015-08-28 18:46:56 -0700 | [diff] [blame] | 248 | const GrGeometryProcessor* GrDistanceFieldA8TextGeoProc::TestCreate(GrProcessorTestData* d) { |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 249 | int texIdx = d->fRandom->nextBool() ? GrProcessorUnitTest::kSkiaPMTextureIdx : |
| 250 | GrProcessorUnitTest::kAlphaTextureIdx; |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 251 | static const SkShader::TileMode kTileModes[] = { |
| 252 | SkShader::kClamp_TileMode, |
| 253 | SkShader::kRepeat_TileMode, |
| 254 | SkShader::kMirror_TileMode, |
| 255 | }; |
| 256 | SkShader::TileMode tileModes[] = { |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 257 | kTileModes[d->fRandom->nextULessThan(SK_ARRAY_COUNT(kTileModes))], |
| 258 | kTileModes[d->fRandom->nextULessThan(SK_ARRAY_COUNT(kTileModes))], |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 259 | }; |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 260 | GrTextureParams params(tileModes, d->fRandom->nextBool() ? GrTextureParams::kBilerp_FilterMode : |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 261 | GrTextureParams::kNone_FilterMode); |
| 262 | |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 263 | return GrDistanceFieldA8TextGeoProc::Create(GrRandomColor(d->fRandom), |
| 264 | GrTest::TestMatrix(d->fRandom), |
| 265 | d->fTextures[texIdx], params, |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 266 | #ifdef SK_GAMMA_APPLY_TO_A8 |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 267 | d->fRandom->nextF(), |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 268 | #endif |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 269 | d->fRandom->nextBool() ? |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 270 | kSimilarity_DistanceFieldEffectFlag : 0, |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 271 | d->fRandom->nextBool()); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 272 | } |
| 273 | |
| 274 | /////////////////////////////////////////////////////////////////////////////// |
| 275 | |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 276 | class GrGLDistanceFieldPathGeoProc : public GrGLGeometryProcessor { |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 277 | public: |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame^] | 278 | GrGLDistanceFieldPathGeoProc() |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 279 | : fViewMatrix(SkMatrix::InvalidMatrix()) |
| 280 | , fColor(GrColor_ILLEGAL) |
| 281 | , fTextureSize(SkISize::Make(-1, -1)) {} |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 282 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 283 | void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override{ |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 284 | const GrDistanceFieldPathGeoProc& dfTexEffect = args.fGP.cast<GrDistanceFieldPathGeoProc>(); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 285 | |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 286 | GrGLGPBuilder* pb = args.fPB; |
egdaniel | 29bee0f | 2015-04-29 11:54:42 -0700 | [diff] [blame] | 287 | GrGLFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder(); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 288 | SkAssertResult(fsBuilder->enableFeature( |
| 289 | GrGLFragmentShaderBuilder::kStandardDerivatives_GLSLFeature)); |
| 290 | |
joshualitt | 2dd1ae0 | 2014-12-03 06:24:10 -0800 | [diff] [blame] | 291 | GrGLVertexBuilder* vsBuilder = args.fPB->getVertexShaderBuilder(); |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 292 | |
| 293 | // emit attributes |
| 294 | vsBuilder->emitAttributes(dfTexEffect); |
| 295 | |
reed | e4ef1ca | 2015-02-17 18:38:38 -0800 | [diff] [blame] | 296 | GrGLVertToFrag v(kVec2f_GrSLType); |
jvanverth | 9671ecd | 2015-02-23 13:08:39 -0800 | [diff] [blame] | 297 | args.fPB->addVarying("TextureCoords", &v, kHigh_GrSLPrecision); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 298 | |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 299 | // setup pass through color |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 300 | if (!dfTexEffect.colorIgnored()) { |
| 301 | if (dfTexEffect.hasVertexColor()) { |
| 302 | pb->addPassThroughAttribute(dfTexEffect.inColor(), args.fOutputColor); |
| 303 | } else { |
| 304 | this->setupUniformColor(pb, args.fOutputColor, &fColorUniform); |
| 305 | } |
| 306 | } |
reed | e4ef1ca | 2015-02-17 18:38:38 -0800 | [diff] [blame] | 307 | vsBuilder->codeAppendf("%s = %s;", v.vsOut(), dfTexEffect.inTextureCoords()->fName); |
| 308 | |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 309 | // Setup position |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 310 | this->setupPosition(pb, gpArgs, dfTexEffect.inPosition()->fName, dfTexEffect.viewMatrix(), |
| 311 | &fViewMatrixUniform); |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 312 | |
| 313 | // emit transforms |
robertphillips | 46d36f0 | 2015-01-18 08:14:14 -0800 | [diff] [blame] | 314 | this->emitTransforms(args.fPB, gpArgs->fPositionVar, dfTexEffect.inPosition()->fName, |
joshualitt | e3ababe | 2015-05-15 07:56:07 -0700 | [diff] [blame] | 315 | args.fTransformsIn, args.fTransformsOut); |
joshualitt | 4973d9d | 2014-11-08 09:24:25 -0800 | [diff] [blame] | 316 | |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 317 | const char* textureSizeUniName = nullptr; |
reed | e4ef1ca | 2015-02-17 18:38:38 -0800 | [diff] [blame] | 318 | fTextureSizeUni = args.fPB->addUniform(GrGLProgramBuilder::kFragment_Visibility, |
| 319 | kVec2f_GrSLType, kDefault_GrSLPrecision, |
| 320 | "TextureSize", &textureSizeUniName); |
| 321 | |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 322 | // Use highp to work around aliasing issues |
| 323 | fsBuilder->codeAppend(GrGLShaderVar::PrecisionString(kHigh_GrSLPrecision, |
| 324 | pb->ctxInfo().standard())); |
reed | e4ef1ca | 2015-02-17 18:38:38 -0800 | [diff] [blame] | 325 | fsBuilder->codeAppendf("vec2 uv = %s;", v.fsIn()); |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 326 | |
| 327 | fsBuilder->codeAppend("float texColor = "); |
joshualitt | c369e7c | 2014-10-22 10:56:26 -0700 | [diff] [blame] | 328 | fsBuilder->appendTextureLookup(args.fSamplers[0], |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 329 | "uv", |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 330 | kVec2f_GrSLType); |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 331 | fsBuilder->codeAppend(".r;"); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 332 | fsBuilder->codeAppend("float distance = " |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 333 | SK_DistanceFieldMultiplier "*(texColor - " SK_DistanceFieldThreshold ");"); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 334 | |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 335 | fsBuilder->codeAppend(GrGLShaderVar::PrecisionString(kHigh_GrSLPrecision, |
| 336 | pb->ctxInfo().standard())); |
reed | e4ef1ca | 2015-02-17 18:38:38 -0800 | [diff] [blame] | 337 | fsBuilder->codeAppendf("vec2 st = uv*%s;", textureSizeUniName); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 338 | fsBuilder->codeAppend("float afwidth;"); |
| 339 | if (dfTexEffect.getFlags() & kSimilarity_DistanceFieldEffectFlag) { |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 340 | // For uniform scale, we adjust for the effect of the transformation on the distance |
| 341 | // by using the length of the gradient of the texture coordinates. We use st coordinates |
| 342 | // to ensure we're mapping 1:1 from texel space to pixel space. |
| 343 | |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 344 | // this gives us a smooth step across approximately one fragment |
jvanverth | bc02735 | 2015-04-15 13:41:31 -0700 | [diff] [blame] | 345 | fsBuilder->codeAppend("afwidth = abs(" SK_DistanceFieldAAFactor "*dFdy(st.y));"); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 346 | } else { |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 347 | // For general transforms, to determine the amount of correction we multiply a unit |
| 348 | // vector pointing along the SDF gradient direction by the Jacobian of the st coords |
| 349 | // (which is the inverse transform for this fragment) and take the length of the result. |
| 350 | fsBuilder->codeAppend("vec2 dist_grad = vec2(dFdx(distance), dFdy(distance));"); |
jvanverth | d68a550 | 2015-03-16 12:58:43 -0700 | [diff] [blame] | 351 | // the length of the gradient may be 0, so we need to check for this |
| 352 | // this also compensates for the Adreno, which likes to drop tiles on division by 0 |
| 353 | fsBuilder->codeAppend("float dg_len2 = dot(dist_grad, dist_grad);"); |
| 354 | fsBuilder->codeAppend("if (dg_len2 < 0.0001) {"); |
| 355 | fsBuilder->codeAppend("dist_grad = vec2(0.7071, 0.7071);"); |
| 356 | fsBuilder->codeAppend("} else {"); |
| 357 | fsBuilder->codeAppend("dist_grad = dist_grad*inversesqrt(dg_len2);"); |
| 358 | fsBuilder->codeAppend("}"); |
| 359 | |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 360 | fsBuilder->codeAppend("vec2 Jdx = dFdx(st);"); |
| 361 | fsBuilder->codeAppend("vec2 Jdy = dFdy(st);"); |
| 362 | fsBuilder->codeAppend("vec2 grad = vec2(dist_grad.x*Jdx.x + dist_grad.y*Jdy.x,"); |
| 363 | fsBuilder->codeAppend(" dist_grad.x*Jdx.y + dist_grad.y*Jdy.y);"); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 364 | |
| 365 | // this gives us a smooth step across approximately one fragment |
| 366 | fsBuilder->codeAppend("afwidth = " SK_DistanceFieldAAFactor "*length(grad);"); |
| 367 | } |
| 368 | fsBuilder->codeAppend("float val = smoothstep(-afwidth, afwidth, distance);"); |
| 369 | |
joshualitt | 2dd1ae0 | 2014-12-03 06:24:10 -0800 | [diff] [blame] | 370 | fsBuilder->codeAppendf("%s = vec4(val);", args.fOutputCoverage); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 371 | } |
| 372 | |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame^] | 373 | void setData(const GrGLProgramDataManager& pdman, const GrPrimitiveProcessor& proc) override { |
reed | e4ef1ca | 2015-02-17 18:38:38 -0800 | [diff] [blame] | 374 | SkASSERT(fTextureSizeUni.isValid()); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 375 | |
joshualitt | 87f48d9 | 2014-12-04 10:41:40 -0800 | [diff] [blame] | 376 | GrTexture* texture = proc.texture(0); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 377 | if (texture->width() != fTextureSize.width() || |
| 378 | texture->height() != fTextureSize.height()) { |
| 379 | fTextureSize = SkISize::Make(texture->width(), texture->height()); |
reed | e4ef1ca | 2015-02-17 18:38:38 -0800 | [diff] [blame] | 380 | pdman.set2f(fTextureSizeUni, |
| 381 | SkIntToScalar(fTextureSize.width()), |
| 382 | SkIntToScalar(fTextureSize.height())); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 383 | } |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 384 | |
joshualitt | e578a95 | 2015-05-14 10:09:13 -0700 | [diff] [blame] | 385 | const GrDistanceFieldPathGeoProc& dfpgp = proc.cast<GrDistanceFieldPathGeoProc>(); |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 386 | |
| 387 | if (!dfpgp.viewMatrix().isIdentity() && !fViewMatrix.cheapEqualTo(dfpgp.viewMatrix())) { |
| 388 | fViewMatrix = dfpgp.viewMatrix(); |
| 389 | GrGLfloat viewMatrix[3 * 3]; |
| 390 | GrGLGetMatrix<3>(viewMatrix, fViewMatrix); |
| 391 | pdman.setMatrix3f(fViewMatrixUniform, viewMatrix); |
| 392 | } |
joshualitt | ee2af95 | 2014-12-30 09:04:15 -0800 | [diff] [blame] | 393 | |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 394 | if (dfpgp.color() != fColor) { |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 395 | GrGLfloat c[4]; |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 396 | GrColorToRGBAFloat(dfpgp.color(), c); |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 397 | pdman.set4fv(fColorUniform, 1, c); |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 398 | fColor = dfpgp.color(); |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 399 | } |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 400 | } |
| 401 | |
robertphillips | 46d36f0 | 2015-01-18 08:14:14 -0800 | [diff] [blame] | 402 | static inline void GenKey(const GrGeometryProcessor& gp, |
jvanverth | cfc1886 | 2015-04-28 08:48:20 -0700 | [diff] [blame] | 403 | const GrGLSLCaps&, |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 404 | GrProcessorKeyBuilder* b) { |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 405 | const GrDistanceFieldPathGeoProc& dfTexEffect = gp.cast<GrDistanceFieldPathGeoProc>(); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 406 | |
joshualitt | 8fc6c2d | 2014-12-22 15:27:05 -0800 | [diff] [blame] | 407 | uint32_t key = dfTexEffect.getFlags(); |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 408 | key |= dfTexEffect.colorIgnored() << 16; |
| 409 | key |= dfTexEffect.hasVertexColor() << 17; |
joshualitt | e578a95 | 2015-05-14 10:09:13 -0700 | [diff] [blame] | 410 | key |= ComputePosKey(dfTexEffect.viewMatrix()) << 25; |
joshualitt | 8fc6c2d | 2014-12-22 15:27:05 -0800 | [diff] [blame] | 411 | b->add32(key); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 412 | } |
| 413 | |
| 414 | private: |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 415 | UniformHandle fColorUniform; |
reed | e4ef1ca | 2015-02-17 18:38:38 -0800 | [diff] [blame] | 416 | UniformHandle fTextureSizeUni; |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 417 | UniformHandle fViewMatrixUniform; |
| 418 | SkMatrix fViewMatrix; |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 419 | GrColor fColor; |
| 420 | SkISize fTextureSize; |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 421 | |
| 422 | typedef GrGLGeometryProcessor INHERITED; |
| 423 | }; |
| 424 | |
| 425 | /////////////////////////////////////////////////////////////////////////////// |
| 426 | |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 427 | GrDistanceFieldPathGeoProc::GrDistanceFieldPathGeoProc( |
joshualitt | 2e3b3e3 | 2014-12-09 13:31:14 -0800 | [diff] [blame] | 428 | GrColor color, |
joshualitt | 8059eb9 | 2014-12-29 15:10:07 -0800 | [diff] [blame] | 429 | const SkMatrix& viewMatrix, |
joshualitt | 2e3b3e3 | 2014-12-09 13:31:14 -0800 | [diff] [blame] | 430 | GrTexture* texture, |
| 431 | const GrTextureParams& params, |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 432 | uint32_t flags, |
| 433 | bool usesLocalCoords) |
joshualitt | e3ababe | 2015-05-15 07:56:07 -0700 | [diff] [blame] | 434 | : fColor(color) |
joshualitt | e578a95 | 2015-05-14 10:09:13 -0700 | [diff] [blame] | 435 | , fViewMatrix(viewMatrix) |
joshualitt | 2e3b3e3 | 2014-12-09 13:31:14 -0800 | [diff] [blame] | 436 | , fTextureAccess(texture, params) |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 437 | , fFlags(flags & kNonLCD_DistanceFieldEffectMask) |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 438 | , fInColor(nullptr) |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 439 | , fUsesLocalCoords(usesLocalCoords) { |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 440 | SkASSERT(!(flags & ~kNonLCD_DistanceFieldEffectMask)); |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 441 | this->initClassID<GrDistanceFieldPathGeoProc>(); |
senorblanco | f2539d5 | 2015-05-20 14:03:42 -0700 | [diff] [blame] | 442 | fInPosition = &this->addVertexAttrib(Attribute("inPosition", kVec2f_GrVertexAttribType, |
| 443 | kHigh_GrSLPrecision)); |
joshualitt | 2dd1ae0 | 2014-12-03 06:24:10 -0800 | [diff] [blame] | 444 | if (flags & kColorAttr_DistanceFieldEffectFlag) { |
joshualitt | 71c9260 | 2015-01-14 08:12:47 -0800 | [diff] [blame] | 445 | fInColor = &this->addVertexAttrib(Attribute("inColor", kVec4ub_GrVertexAttribType)); |
joshualitt | 2dd1ae0 | 2014-12-03 06:24:10 -0800 | [diff] [blame] | 446 | } |
joshualitt | 71c9260 | 2015-01-14 08:12:47 -0800 | [diff] [blame] | 447 | fInTextureCoords = &this->addVertexAttrib(Attribute("inTextureCoords", |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 448 | kVec2f_GrVertexAttribType)); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 449 | this->addTextureAccess(&fTextureAccess); |
| 450 | } |
| 451 | |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame^] | 452 | void GrDistanceFieldPathGeoProc::getGLProcessorKey(const GrGLSLCaps& caps, |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 453 | GrProcessorKeyBuilder* b) const { |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame^] | 454 | GrGLDistanceFieldPathGeoProc::GenKey(*this, caps, b); |
joshualitt | eb2a676 | 2014-12-04 11:35:33 -0800 | [diff] [blame] | 455 | } |
| 456 | |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame^] | 457 | GrGLPrimitiveProcessor* GrDistanceFieldPathGeoProc::createGLInstance(const GrGLSLCaps&) const { |
| 458 | return new GrGLDistanceFieldPathGeoProc(); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 459 | } |
| 460 | |
| 461 | /////////////////////////////////////////////////////////////////////////////// |
| 462 | |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 463 | GR_DEFINE_GEOMETRY_PROCESSOR_TEST(GrDistanceFieldPathGeoProc); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 464 | |
bsalomon | c21b09e | 2015-08-28 18:46:56 -0700 | [diff] [blame] | 465 | const GrGeometryProcessor* GrDistanceFieldPathGeoProc::TestCreate(GrProcessorTestData* d) { |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 466 | int texIdx = d->fRandom->nextBool() ? GrProcessorUnitTest::kSkiaPMTextureIdx |
| 467 | : GrProcessorUnitTest::kAlphaTextureIdx; |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 468 | static const SkShader::TileMode kTileModes[] = { |
| 469 | SkShader::kClamp_TileMode, |
| 470 | SkShader::kRepeat_TileMode, |
| 471 | SkShader::kMirror_TileMode, |
| 472 | }; |
| 473 | SkShader::TileMode tileModes[] = { |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 474 | kTileModes[d->fRandom->nextULessThan(SK_ARRAY_COUNT(kTileModes))], |
| 475 | kTileModes[d->fRandom->nextULessThan(SK_ARRAY_COUNT(kTileModes))], |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 476 | }; |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 477 | GrTextureParams params(tileModes, d->fRandom->nextBool() ? GrTextureParams::kBilerp_FilterMode |
| 478 | : GrTextureParams::kNone_FilterMode); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 479 | |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 480 | return GrDistanceFieldPathGeoProc::Create(GrRandomColor(d->fRandom), |
| 481 | GrTest::TestMatrix(d->fRandom), |
| 482 | d->fTextures[texIdx], |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 483 | params, |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 484 | d->fRandom->nextBool() ? |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 485 | kSimilarity_DistanceFieldEffectFlag : 0, |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 486 | d->fRandom->nextBool()); |
jvanverth | fa38a30 | 2014-10-06 05:59:05 -0700 | [diff] [blame] | 487 | } |
| 488 | |
| 489 | /////////////////////////////////////////////////////////////////////////////// |
| 490 | |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 491 | class GrGLDistanceFieldLCDTextGeoProc : public GrGLGeometryProcessor { |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 492 | public: |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame^] | 493 | GrGLDistanceFieldLCDTextGeoProc() |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 494 | : fViewMatrix(SkMatrix::InvalidMatrix()), fColor(GrColor_ILLEGAL) { |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 495 | fDistanceAdjust = GrDistanceFieldLCDTextGeoProc::DistanceAdjust::Make(1.0f, 1.0f, 1.0f); |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 496 | } |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 497 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 498 | void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override{ |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 499 | const GrDistanceFieldLCDTextGeoProc& dfTexEffect = |
| 500 | args.fGP.cast<GrDistanceFieldLCDTextGeoProc>(); |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 501 | GrGLGPBuilder* pb = args.fPB; |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 502 | |
joshualitt | c369e7c | 2014-10-22 10:56:26 -0700 | [diff] [blame] | 503 | GrGLVertexBuilder* vsBuilder = args.fPB->getVertexShaderBuilder(); |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 504 | |
| 505 | // emit attributes |
| 506 | vsBuilder->emitAttributes(dfTexEffect); |
| 507 | |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 508 | // setup pass through color |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 509 | if (!dfTexEffect.colorIgnored()) { |
| 510 | this->setupUniformColor(pb, args.fOutputColor, &fColorUniform); |
| 511 | } |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 512 | |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 513 | // Setup position |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 514 | this->setupPosition(pb, gpArgs, dfTexEffect.inPosition()->fName, dfTexEffect.viewMatrix(), |
| 515 | &fViewMatrixUniform); |
joshualitt | 4973d9d | 2014-11-08 09:24:25 -0800 | [diff] [blame] | 516 | |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 517 | // emit transforms |
robertphillips | 46d36f0 | 2015-01-18 08:14:14 -0800 | [diff] [blame] | 518 | this->emitTransforms(args.fPB, gpArgs->fPositionVar, dfTexEffect.inPosition()->fName, |
joshualitt | e3ababe | 2015-05-15 07:56:07 -0700 | [diff] [blame] | 519 | args.fTransformsIn, args.fTransformsOut); |
joshualitt | abb52a1 | 2015-01-13 15:02:10 -0800 | [diff] [blame] | 520 | |
jvanverth | bb4a1cf | 2015-04-07 09:06:00 -0700 | [diff] [blame] | 521 | // set up varyings |
| 522 | bool isUniformScale = SkToBool(dfTexEffect.getFlags() & kUniformScale_DistanceFieldEffectMask); |
| 523 | GrGLVertToFrag recipScale(kFloat_GrSLType); |
| 524 | GrGLVertToFrag st(kVec2f_GrSLType); |
jvanverth | 221360a | 2015-04-15 12:31:22 -0700 | [diff] [blame] | 525 | args.fPB->addVarying("IntTextureCoords", &st, kHigh_GrSLPrecision); |
| 526 | vsBuilder->codeAppendf("%s = %s;", st.vsOut(), dfTexEffect.inTextureCoords()->fName); |
jvanverth | bb4a1cf | 2015-04-07 09:06:00 -0700 | [diff] [blame] | 527 | |
joshualitt | 922c8b1 | 2015-08-07 09:55:23 -0700 | [diff] [blame] | 528 | // compute numbers to be hardcoded to convert texture coordinates from int to float |
| 529 | SkASSERT(dfTexEffect.numTextures() == 1); |
| 530 | GrTexture* atlas = dfTexEffect.textureAccess(0).getTexture(); |
joshualitt | 7375d6b | 2015-08-07 13:36:44 -0700 | [diff] [blame] | 531 | SkASSERT(atlas && SkIsPow2(atlas->width()) && SkIsPow2(atlas->height())); |
joshualitt | 922c8b1 | 2015-08-07 09:55:23 -0700 | [diff] [blame] | 532 | SkScalar recipWidth = 1.0f / atlas->width(); |
| 533 | SkScalar recipHeight = 1.0f / atlas->height(); |
| 534 | |
jvanverth | bb4a1cf | 2015-04-07 09:06:00 -0700 | [diff] [blame] | 535 | GrGLVertToFrag uv(kVec2f_GrSLType); |
| 536 | args.fPB->addVarying("TextureCoords", &uv, kHigh_GrSLPrecision); |
joshualitt | 922c8b1 | 2015-08-07 09:55:23 -0700 | [diff] [blame] | 537 | vsBuilder->codeAppendf("%s = vec2(%.*f, %.*f) * %s;", uv.vsOut(), |
joshualitt | 7375d6b | 2015-08-07 13:36:44 -0700 | [diff] [blame] | 538 | GR_SIGNIFICANT_POW2_DECIMAL_DIG, recipWidth, |
| 539 | GR_SIGNIFICANT_POW2_DECIMAL_DIG, recipHeight, |
jvanverth | bb4a1cf | 2015-04-07 09:06:00 -0700 | [diff] [blame] | 540 | dfTexEffect.inTextureCoords()->fName); |
| 541 | |
| 542 | // add frag shader code |
egdaniel | 29bee0f | 2015-04-29 11:54:42 -0700 | [diff] [blame] | 543 | GrGLFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder(); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 544 | |
| 545 | SkAssertResult(fsBuilder->enableFeature( |
| 546 | GrGLFragmentShaderBuilder::kStandardDerivatives_GLSLFeature)); |
| 547 | |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 548 | // create LCD offset adjusted by inverse of transform |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 549 | // Use highp to work around aliasing issues |
| 550 | fsBuilder->codeAppend(GrGLShaderVar::PrecisionString(kHigh_GrSLPrecision, |
| 551 | pb->ctxInfo().standard())); |
jvanverth | 5a105ff | 2015-02-18 11:36:35 -0800 | [diff] [blame] | 552 | fsBuilder->codeAppendf("vec2 uv = %s;\n", uv.fsIn()); |
jvanverth | fdf7ccc | 2015-01-27 08:19:33 -0800 | [diff] [blame] | 553 | fsBuilder->codeAppend(GrGLShaderVar::PrecisionString(kHigh_GrSLPrecision, |
| 554 | pb->ctxInfo().standard())); |
joshualitt | 922c8b1 | 2015-08-07 09:55:23 -0700 | [diff] [blame] | 555 | |
| 556 | SkScalar lcdDelta = 1.0f / (3.0f * atlas->width()); |
jvanverth | 5a105ff | 2015-02-18 11:36:35 -0800 | [diff] [blame] | 557 | if (dfTexEffect.getFlags() & kBGR_DistanceFieldEffectFlag) { |
joshualitt | 922c8b1 | 2015-08-07 09:55:23 -0700 | [diff] [blame] | 558 | fsBuilder->codeAppendf("float delta = -%.*f;\n", SK_FLT_DECIMAL_DIG, lcdDelta); |
jvanverth | 5a105ff | 2015-02-18 11:36:35 -0800 | [diff] [blame] | 559 | } else { |
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 | } |
jvanverth | 78f0718 | 2014-07-30 06:17:59 -0700 | [diff] [blame] | 562 | if (isUniformScale) { |
jvanverth | bc02735 | 2015-04-15 13:41:31 -0700 | [diff] [blame] | 563 | fsBuilder->codeAppendf("float dy = abs(dFdy(%s.y));", st.fsIn()); |
jvanverth | 221360a | 2015-04-15 12:31:22 -0700 | [diff] [blame] | 564 | fsBuilder->codeAppend("vec2 offset = vec2(dy*delta, 0.0);"); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 565 | } else { |
jvanverth | bb4a1cf | 2015-04-07 09:06:00 -0700 | [diff] [blame] | 566 | fsBuilder->codeAppendf("vec2 st = %s;\n", st.fsIn()); |
| 567 | |
| 568 | fsBuilder->codeAppend("vec2 Jdx = dFdx(st);"); |
| 569 | fsBuilder->codeAppend("vec2 Jdy = dFdy(st);"); |
| 570 | fsBuilder->codeAppend("vec2 offset = delta*Jdx;"); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 571 | } |
| 572 | |
| 573 | // green is distance to uv center |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 574 | fsBuilder->codeAppend("\tvec4 texColor = "); |
joshualitt | c369e7c | 2014-10-22 10:56:26 -0700 | [diff] [blame] | 575 | fsBuilder->appendTextureLookup(args.fSamplers[0], "uv", kVec2f_GrSLType); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 576 | fsBuilder->codeAppend(";\n"); |
| 577 | fsBuilder->codeAppend("\tvec3 distance;\n"); |
| 578 | fsBuilder->codeAppend("\tdistance.y = texColor.r;\n"); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 579 | // red is distance to left offset |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 580 | fsBuilder->codeAppend("\tvec2 uv_adjusted = uv - offset;\n"); |
| 581 | fsBuilder->codeAppend("\ttexColor = "); |
joshualitt | c369e7c | 2014-10-22 10:56:26 -0700 | [diff] [blame] | 582 | fsBuilder->appendTextureLookup(args.fSamplers[0], "uv_adjusted", kVec2f_GrSLType); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 583 | fsBuilder->codeAppend(";\n"); |
| 584 | fsBuilder->codeAppend("\tdistance.x = texColor.r;\n"); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 585 | // blue is distance to right offset |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 586 | fsBuilder->codeAppend("\tuv_adjusted = uv + offset;\n"); |
| 587 | fsBuilder->codeAppend("\ttexColor = "); |
joshualitt | c369e7c | 2014-10-22 10:56:26 -0700 | [diff] [blame] | 588 | fsBuilder->appendTextureLookup(args.fSamplers[0], "uv_adjusted", kVec2f_GrSLType); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 589 | fsBuilder->codeAppend(";\n"); |
| 590 | fsBuilder->codeAppend("\tdistance.z = texColor.r;\n"); |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 591 | |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 592 | fsBuilder->codeAppend("\tdistance = " |
jvanverth | ada68ef | 2014-11-03 14:00:24 -0800 | [diff] [blame] | 593 | "vec3(" SK_DistanceFieldMultiplier ")*(distance - vec3(" SK_DistanceFieldThreshold"));"); |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 594 | |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 595 | // adjust width based on gamma |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 596 | const char* distanceAdjustUniName = nullptr; |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 597 | fDistanceAdjustUni = args.fPB->addUniform(GrGLProgramBuilder::kFragment_Visibility, |
| 598 | kVec3f_GrSLType, kDefault_GrSLPrecision, |
| 599 | "DistanceAdjust", &distanceAdjustUniName); |
| 600 | fsBuilder->codeAppendf("distance -= %s;", distanceAdjustUniName); |
| 601 | |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 602 | // To be strictly correct, we should compute the anti-aliasing factor separately |
| 603 | // for each color component. However, this is only important when using perspective |
| 604 | // transformations, and even then using a single factor seems like a reasonable |
| 605 | // trade-off between quality and speed. |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 606 | fsBuilder->codeAppend("float afwidth;"); |
jvanverth | 78f0718 | 2014-07-30 06:17:59 -0700 | [diff] [blame] | 607 | if (isUniformScale) { |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 608 | // For uniform scale, we adjust for the effect of the transformation on the distance |
| 609 | // by using the length of the gradient of the texture coordinates. We use st coordinates |
| 610 | // to ensure we're mapping 1:1 from texel space to pixel space. |
| 611 | |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 612 | // this gives us a smooth step across approximately one fragment |
jvanverth | bc02735 | 2015-04-15 13:41:31 -0700 | [diff] [blame] | 613 | fsBuilder->codeAppend("afwidth = " SK_DistanceFieldAAFactor "*dy;"); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 614 | } else { |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 615 | // For general transforms, to determine the amount of correction we multiply a unit |
| 616 | // vector pointing along the SDF gradient direction by the Jacobian of the st coords |
| 617 | // (which is the inverse transform for this fragment) and take the length of the result. |
| 618 | fsBuilder->codeAppend("vec2 dist_grad = vec2(dFdx(distance.r), dFdy(distance.r));"); |
jvanverth | d68a550 | 2015-03-16 12:58:43 -0700 | [diff] [blame] | 619 | // the length of the gradient may be 0, so we need to check for this |
| 620 | // this also compensates for the Adreno, which likes to drop tiles on division by 0 |
| 621 | fsBuilder->codeAppend("float dg_len2 = dot(dist_grad, dist_grad);"); |
| 622 | fsBuilder->codeAppend("if (dg_len2 < 0.0001) {"); |
| 623 | fsBuilder->codeAppend("dist_grad = vec2(0.7071, 0.7071);"); |
| 624 | fsBuilder->codeAppend("} else {"); |
| 625 | fsBuilder->codeAppend("dist_grad = dist_grad*inversesqrt(dg_len2);"); |
| 626 | fsBuilder->codeAppend("}"); |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 627 | fsBuilder->codeAppend("vec2 grad = vec2(dist_grad.x*Jdx.x + dist_grad.y*Jdy.x,"); |
| 628 | 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] | 629 | |
| 630 | // this gives us a smooth step across approximately one fragment |
jvanverth | 354eba5 | 2015-03-16 11:32:49 -0700 | [diff] [blame] | 631 | fsBuilder->codeAppend("afwidth = " SK_DistanceFieldAAFactor "*length(grad);"); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 632 | } |
| 633 | |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 634 | fsBuilder->codeAppend( |
| 635 | "vec4 val = vec4(smoothstep(vec3(-afwidth), vec3(afwidth), distance), 1.0);"); |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 636 | |
joshualitt | 2dd1ae0 | 2014-12-03 06:24:10 -0800 | [diff] [blame] | 637 | fsBuilder->codeAppendf("%s = vec4(val);", args.fOutputCoverage); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 638 | } |
| 639 | |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame^] | 640 | void setData(const GrGLProgramDataManager& pdman, |
| 641 | const GrPrimitiveProcessor& processor) override { |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 642 | SkASSERT(fDistanceAdjustUni.isValid()); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 643 | |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 644 | const GrDistanceFieldLCDTextGeoProc& dflcd = processor.cast<GrDistanceFieldLCDTextGeoProc>(); |
| 645 | GrDistanceFieldLCDTextGeoProc::DistanceAdjust wa = dflcd.getDistanceAdjust(); |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 646 | if (wa != fDistanceAdjust) { |
| 647 | pdman.set3f(fDistanceAdjustUni, |
| 648 | wa.fR, |
| 649 | wa.fG, |
| 650 | wa.fB); |
| 651 | fDistanceAdjust = wa; |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 652 | } |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 653 | |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 654 | if (!dflcd.viewMatrix().isIdentity() && !fViewMatrix.cheapEqualTo(dflcd.viewMatrix())) { |
| 655 | fViewMatrix = dflcd.viewMatrix(); |
| 656 | GrGLfloat viewMatrix[3 * 3]; |
| 657 | GrGLGetMatrix<3>(viewMatrix, fViewMatrix); |
| 658 | pdman.setMatrix3f(fViewMatrixUniform, viewMatrix); |
| 659 | } |
joshualitt | ee2af95 | 2014-12-30 09:04:15 -0800 | [diff] [blame] | 660 | |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 661 | if (dflcd.color() != fColor) { |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 662 | GrGLfloat c[4]; |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 663 | GrColorToRGBAFloat(dflcd.color(), c); |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 664 | pdman.set4fv(fColorUniform, 1, c); |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 665 | fColor = dflcd.color(); |
joshualitt | 9b98932 | 2014-12-15 14:16:27 -0800 | [diff] [blame] | 666 | } |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 667 | } |
| 668 | |
robertphillips | 46d36f0 | 2015-01-18 08:14:14 -0800 | [diff] [blame] | 669 | static inline void GenKey(const GrGeometryProcessor& gp, |
jvanverth | cfc1886 | 2015-04-28 08:48:20 -0700 | [diff] [blame] | 670 | const GrGLSLCaps&, |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 671 | GrProcessorKeyBuilder* b) { |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 672 | const GrDistanceFieldLCDTextGeoProc& dfTexEffect = gp.cast<GrDistanceFieldLCDTextGeoProc>(); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 673 | |
joshualitt | 8fc6c2d | 2014-12-22 15:27:05 -0800 | [diff] [blame] | 674 | uint32_t key = dfTexEffect.getFlags(); |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 675 | key |= dfTexEffect.colorIgnored() << 16; |
joshualitt | e578a95 | 2015-05-14 10:09:13 -0700 | [diff] [blame] | 676 | key |= ComputePosKey(dfTexEffect.viewMatrix()) << 25; |
joshualitt | 8fc6c2d | 2014-12-22 15:27:05 -0800 | [diff] [blame] | 677 | b->add32(key); |
joshualitt | 922c8b1 | 2015-08-07 09:55:23 -0700 | [diff] [blame] | 678 | |
| 679 | // Currently we hardcode numbers to convert atlas coordinates to normalized floating point |
| 680 | SkASSERT(gp.numTextures() == 1); |
| 681 | GrTexture* atlas = gp.textureAccess(0).getTexture(); |
| 682 | SkASSERT(atlas); |
| 683 | b->add32(atlas->width()); |
| 684 | b->add32(atlas->height()); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 685 | } |
| 686 | |
| 687 | private: |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 688 | SkMatrix fViewMatrix; |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 689 | GrColor fColor; |
joshualitt | 5559ca2 | 2015-05-21 15:50:36 -0700 | [diff] [blame] | 690 | UniformHandle fViewMatrixUniform; |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 691 | UniformHandle fColorUniform; |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 692 | GrDistanceFieldLCDTextGeoProc::DistanceAdjust fDistanceAdjust; |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 693 | UniformHandle fDistanceAdjustUni; |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 694 | |
joshualitt | 249af15 | 2014-09-15 11:41:13 -0700 | [diff] [blame] | 695 | typedef GrGLGeometryProcessor INHERITED; |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 696 | }; |
| 697 | |
| 698 | /////////////////////////////////////////////////////////////////////////////// |
| 699 | |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 700 | GrDistanceFieldLCDTextGeoProc::GrDistanceFieldLCDTextGeoProc( |
joshualitt | 8059eb9 | 2014-12-29 15:10:07 -0800 | [diff] [blame] | 701 | GrColor color, const SkMatrix& viewMatrix, |
jvanverth | 2d2a68c | 2014-06-10 06:42:56 -0700 | [diff] [blame] | 702 | GrTexture* texture, const GrTextureParams& params, |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 703 | DistanceAdjust distanceAdjust, |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 704 | uint32_t flags, bool usesLocalCoords) |
joshualitt | e3ababe | 2015-05-15 07:56:07 -0700 | [diff] [blame] | 705 | : fColor(color) |
joshualitt | e578a95 | 2015-05-14 10:09:13 -0700 | [diff] [blame] | 706 | , fViewMatrix(viewMatrix) |
joshualitt | 2e3b3e3 | 2014-12-09 13:31:14 -0800 | [diff] [blame] | 707 | , fTextureAccess(texture, params) |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 708 | , fDistanceAdjust(distanceAdjust) |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 709 | , fFlags(flags & kLCD_DistanceFieldEffectMask) |
| 710 | , fUsesLocalCoords(usesLocalCoords) { |
jvanverth | 78f0718 | 2014-07-30 06:17:59 -0700 | [diff] [blame] | 711 | SkASSERT(!(flags & ~kLCD_DistanceFieldEffectMask) && (flags & kUseLCD_DistanceFieldEffectFlag)); |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 712 | this->initClassID<GrDistanceFieldLCDTextGeoProc>(); |
senorblanco | f2539d5 | 2015-05-20 14:03:42 -0700 | [diff] [blame] | 713 | fInPosition = &this->addVertexAttrib(Attribute("inPosition", kVec2f_GrVertexAttribType, |
| 714 | kHigh_GrSLPrecision)); |
joshualitt | 71c9260 | 2015-01-14 08:12:47 -0800 | [diff] [blame] | 715 | fInTextureCoords = &this->addVertexAttrib(Attribute("inTextureCoords", |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 716 | kVec2s_GrVertexAttribType)); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 717 | this->addTextureAccess(&fTextureAccess); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 718 | } |
| 719 | |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame^] | 720 | void GrDistanceFieldLCDTextGeoProc::getGLProcessorKey(const GrGLSLCaps& caps, |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 721 | GrProcessorKeyBuilder* b) const { |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame^] | 722 | GrGLDistanceFieldLCDTextGeoProc::GenKey(*this, caps, b); |
joshualitt | eb2a676 | 2014-12-04 11:35:33 -0800 | [diff] [blame] | 723 | } |
| 724 | |
joshualitt | 465283c | 2015-09-11 08:19:35 -0700 | [diff] [blame^] | 725 | GrGLPrimitiveProcessor* GrDistanceFieldLCDTextGeoProc::createGLInstance(const GrGLSLCaps&) const { |
| 726 | return new GrGLDistanceFieldLCDTextGeoProc(); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 727 | } |
| 728 | |
| 729 | /////////////////////////////////////////////////////////////////////////////// |
| 730 | |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 731 | GR_DEFINE_GEOMETRY_PROCESSOR_TEST(GrDistanceFieldLCDTextGeoProc); |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 732 | |
bsalomon | c21b09e | 2015-08-28 18:46:56 -0700 | [diff] [blame] | 733 | const GrGeometryProcessor* GrDistanceFieldLCDTextGeoProc::TestCreate(GrProcessorTestData* d) { |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 734 | int texIdx = d->fRandom->nextBool() ? GrProcessorUnitTest::kSkiaPMTextureIdx : |
| 735 | GrProcessorUnitTest::kAlphaTextureIdx; |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 736 | static const SkShader::TileMode kTileModes[] = { |
| 737 | SkShader::kClamp_TileMode, |
| 738 | SkShader::kRepeat_TileMode, |
| 739 | SkShader::kMirror_TileMode, |
| 740 | }; |
| 741 | SkShader::TileMode tileModes[] = { |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 742 | kTileModes[d->fRandom->nextULessThan(SK_ARRAY_COUNT(kTileModes))], |
| 743 | kTileModes[d->fRandom->nextULessThan(SK_ARRAY_COUNT(kTileModes))], |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 744 | }; |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 745 | GrTextureParams params(tileModes, d->fRandom->nextBool() ? GrTextureParams::kBilerp_FilterMode : |
commit-bot@chromium.org | 609ced4 | 2014-04-03 18:25:48 +0000 | [diff] [blame] | 746 | GrTextureParams::kNone_FilterMode); |
jvanverth | 21deace | 2015-04-01 12:43:48 -0700 | [diff] [blame] | 747 | DistanceAdjust wa = { 0.0f, 0.1f, -0.1f }; |
jvanverth | 78f0718 | 2014-07-30 06:17:59 -0700 | [diff] [blame] | 748 | uint32_t flags = kUseLCD_DistanceFieldEffectFlag; |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 749 | flags |= d->fRandom->nextBool() ? kUniformScale_DistanceFieldEffectMask : 0; |
| 750 | flags |= d->fRandom->nextBool() ? kBGR_DistanceFieldEffectFlag : 0; |
| 751 | return GrDistanceFieldLCDTextGeoProc::Create(GrRandomColor(d->fRandom), |
| 752 | GrTest::TestMatrix(d->fRandom), |
| 753 | d->fTextures[texIdx], params, |
jvanverth | 502286d | 2015-04-08 12:37:51 -0700 | [diff] [blame] | 754 | wa, |
joshualitt | b8c241a | 2015-05-19 08:23:30 -0700 | [diff] [blame] | 755 | flags, |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 756 | d->fRandom->nextBool()); |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 757 | } |