| /* | |
| * Copyright 2013 Google Inc. | |
| * | |
| * Use of this source code is governed by a BSD-style license that can be | |
| * found in the LICENSE file. | |
| */ | |
| #include "GrDistanceFieldGeoProc.h" | |
| #include "GrAtlasedShaderHelpers.h" | |
| #include "GrCaps.h" | |
| #include "GrShaderCaps.h" | |
| #include "GrTexture.h" | |
| #include "SkDistanceFieldGen.h" | |
| #include "glsl/GrGLSLFragmentShaderBuilder.h" | |
| #include "glsl/GrGLSLGeometryProcessor.h" | |
| #include "glsl/GrGLSLProgramDataManager.h" | |
| #include "glsl/GrGLSLUniformHandler.h" | |
| #include "glsl/GrGLSLUtil.h" | |
| #include "glsl/GrGLSLVarying.h" | |
| #include "glsl/GrGLSLVertexGeoBuilder.h" | |
| // Assuming a radius of a little less than the diagonal of the fragment | |
| #define SK_DistanceFieldAAFactor "0.65" | |
| class GrGLDistanceFieldA8TextGeoProc : public GrGLSLGeometryProcessor { | |
| public: | |
| GrGLDistanceFieldA8TextGeoProc() = default; | |
| void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override{ | |
| const GrDistanceFieldA8TextGeoProc& dfTexEffect = | |
| args.fGP.cast<GrDistanceFieldA8TextGeoProc>(); | |
| GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder; | |
| GrGLSLVertexBuilder* vertBuilder = args.fVertBuilder; | |
| GrGLSLVaryingHandler* varyingHandler = args.fVaryingHandler; | |
| GrGLSLUniformHandler* uniformHandler = args.fUniformHandler; | |
| // emit attributes | |
| varyingHandler->emitAttributes(dfTexEffect); | |
| const char* atlasSizeInvName; | |
| fAtlasSizeInvUniform = uniformHandler->addUniform(kVertex_GrShaderFlag, | |
| kFloat2_GrSLType, | |
| "AtlasSizeInv", | |
| &atlasSizeInvName); | |
| #ifdef SK_GAMMA_APPLY_TO_A8 | |
| // adjust based on gamma | |
| const char* distanceAdjustUniName = nullptr; | |
| // width, height, 1/(3*width) | |
| fDistanceAdjustUni = uniformHandler->addUniform(kFragment_GrShaderFlag, kHalf_GrSLType, | |
| "DistanceAdjust", &distanceAdjustUniName); | |
| #endif | |
| // Setup pass through color | |
| varyingHandler->addPassThroughAttribute(dfTexEffect.inColor(), args.fOutputColor); | |
| // Setup position | |
| gpArgs->fPositionVar = dfTexEffect.inPosition().asShaderVar(); | |
| // emit transforms | |
| this->emitTransforms(vertBuilder, | |
| varyingHandler, | |
| uniformHandler, | |
| dfTexEffect.inPosition().asShaderVar(), | |
| dfTexEffect.localMatrix(), | |
| args.fFPCoordTransformHandler); | |
| // add varyings | |
| GrGLSLVarying uv(kFloat2_GrSLType); | |
| GrSLType texIdxType = args.fShaderCaps->integerSupport() ? kInt_GrSLType : kFloat_GrSLType; | |
| GrGLSLVarying texIdx(texIdxType); | |
| GrGLSLVarying st(kFloat2_GrSLType); | |
| append_index_uv_varyings(args, dfTexEffect.inTextureCoords().name(), atlasSizeInvName, &uv, | |
| &texIdx, &st); | |
| bool isUniformScale = (dfTexEffect.getFlags() & kUniformScale_DistanceFieldEffectMask) == | |
| kUniformScale_DistanceFieldEffectMask; | |
| bool isSimilarity = SkToBool(dfTexEffect.getFlags() & kSimilarity_DistanceFieldEffectFlag); | |
| bool isGammaCorrect = | |
| SkToBool(dfTexEffect.getFlags() & kGammaCorrect_DistanceFieldEffectFlag); | |
| bool isAliased = | |
| SkToBool(dfTexEffect.getFlags() & kAliased_DistanceFieldEffectFlag); | |
| // Use highp to work around aliasing issues | |
| fragBuilder->codeAppendf("float2 uv = %s;\n", uv.fsIn()); | |
| fragBuilder->codeAppend("half4 texColor;"); | |
| append_multitexture_lookup(args, dfTexEffect.numTextureSamplers(), | |
| texIdx, "uv", "texColor"); | |
| fragBuilder->codeAppend("half distance = " | |
| SK_DistanceFieldMultiplier "*(texColor.r - " SK_DistanceFieldThreshold ");"); | |
| #ifdef SK_GAMMA_APPLY_TO_A8 | |
| // adjust width based on gamma | |
| fragBuilder->codeAppendf("distance -= %s;", distanceAdjustUniName); | |
| #endif | |
| fragBuilder->codeAppend("half afwidth;"); | |
| if (isUniformScale) { | |
| // For uniform scale, we adjust for the effect of the transformation on the distance | |
| // by using the length of the gradient of the t coordinate in the y direction. | |
| // We use st coordinates to ensure we're mapping 1:1 from texel space to pixel space. | |
| // this gives us a smooth step across approximately one fragment | |
| #ifdef SK_VULKAN | |
| fragBuilder->codeAppendf("afwidth = abs(" SK_DistanceFieldAAFactor | |
| "*half(dFdx(%s.x)));", st.fsIn()); | |
| #else | |
| // We use the y gradient because there is a bug in the Mali 400 in the x direction. | |
| fragBuilder->codeAppendf("afwidth = abs(" SK_DistanceFieldAAFactor | |
| "*half(dFdy(%s.y)));", st.fsIn()); | |
| #endif | |
| } else if (isSimilarity) { | |
| // For similarity transform, we adjust the effect of the transformation on the distance | |
| // by using the length of the gradient of the texture coordinates. We use st coordinates | |
| // to ensure we're mapping 1:1 from texel space to pixel space. | |
| // We use the y gradient because there is a bug in the Mali 400 in the x direction. | |
| // this gives us a smooth step across approximately one fragment | |
| #ifdef SK_VULKAN | |
| fragBuilder->codeAppendf("half st_grad_len = length(half2(dFdx(%s)));", st.fsIn()); | |
| #else | |
| // We use the y gradient because there is a bug in the Mali 400 in the x direction. | |
| fragBuilder->codeAppendf("half st_grad_len = length(half2(dFdy(%s)));", st.fsIn()); | |
| #endif | |
| fragBuilder->codeAppend("afwidth = abs(" SK_DistanceFieldAAFactor "*st_grad_len);"); | |
| } else { | |
| // For general transforms, to determine the amount of correction we multiply a unit | |
| // vector pointing along the SDF gradient direction by the Jacobian of the st coords | |
| // (which is the inverse transform for this fragment) and take the length of the result. | |
| fragBuilder->codeAppend("half2 dist_grad = half2(float2(dFdx(distance), " | |
| "dFdy(distance)));"); | |
| // the length of the gradient may be 0, so we need to check for this | |
| // this also compensates for the Adreno, which likes to drop tiles on division by 0 | |
| fragBuilder->codeAppend("half dg_len2 = dot(dist_grad, dist_grad);"); | |
| fragBuilder->codeAppend("if (dg_len2 < 0.0001) {"); | |
| fragBuilder->codeAppend("dist_grad = half2(0.7071, 0.7071);"); | |
| fragBuilder->codeAppend("} else {"); | |
| fragBuilder->codeAppend("dist_grad = dist_grad*half(inversesqrt(dg_len2));"); | |
| fragBuilder->codeAppend("}"); | |
| fragBuilder->codeAppendf("half2 Jdx = half2(dFdx(%s));", st.fsIn()); | |
| fragBuilder->codeAppendf("half2 Jdy = half2(dFdy(%s));", st.fsIn()); | |
| fragBuilder->codeAppend("half2 grad = half2(dist_grad.x*Jdx.x + dist_grad.y*Jdy.x,"); | |
| fragBuilder->codeAppend(" dist_grad.x*Jdx.y + dist_grad.y*Jdy.y);"); | |
| // this gives us a smooth step across approximately one fragment | |
| fragBuilder->codeAppend("afwidth = " SK_DistanceFieldAAFactor "*length(grad);"); | |
| } | |
| if (isAliased) { | |
| fragBuilder->codeAppend("half val = distance > 0 ? 1.0 : 0.0;"); | |
| } else if (isGammaCorrect) { | |
| // The smoothstep falloff compensates for the non-linear sRGB response curve. If we are | |
| // doing gamma-correct rendering (to an sRGB or F16 buffer), then we actually want | |
| // distance mapped linearly to coverage, so use a linear step: | |
| fragBuilder->codeAppend( | |
| "half val = saturate((distance + afwidth) / (2.0 * afwidth));"); | |
| } else { | |
| fragBuilder->codeAppend("half val = smoothstep(-afwidth, afwidth, distance);"); | |
| } | |
| fragBuilder->codeAppendf("%s = half4(val);", args.fOutputCoverage); | |
| } | |
| void setData(const GrGLSLProgramDataManager& pdman, const GrPrimitiveProcessor& proc, | |
| FPCoordTransformIter&& transformIter) override { | |
| const GrDistanceFieldA8TextGeoProc& dfa8gp = proc.cast<GrDistanceFieldA8TextGeoProc>(); | |
| #ifdef SK_GAMMA_APPLY_TO_A8 | |
| float distanceAdjust = dfa8gp.getDistanceAdjust(); | |
| if (distanceAdjust != fDistanceAdjust) { | |
| fDistanceAdjust = distanceAdjust; | |
| pdman.set1f(fDistanceAdjustUni, distanceAdjust); | |
| } | |
| #endif | |
| const SkISize& atlasSize = dfa8gp.atlasSize(); | |
| SkASSERT(SkIsPow2(atlasSize.fWidth) && SkIsPow2(atlasSize.fHeight)); | |
| if (fAtlasSize != atlasSize) { | |
| pdman.set2f(fAtlasSizeInvUniform, 1.0f / atlasSize.fWidth, 1.0f / atlasSize.fHeight); | |
| fAtlasSize = atlasSize; | |
| } | |
| this->setTransformDataHelper(dfa8gp.localMatrix(), pdman, &transformIter); | |
| } | |
| static inline void GenKey(const GrGeometryProcessor& gp, | |
| const GrShaderCaps&, | |
| GrProcessorKeyBuilder* b) { | |
| const GrDistanceFieldA8TextGeoProc& dfTexEffect = gp.cast<GrDistanceFieldA8TextGeoProc>(); | |
| uint32_t key = dfTexEffect.getFlags(); | |
| b->add32(key); | |
| b->add32(dfTexEffect.numTextureSamplers()); | |
| } | |
| private: | |
| #ifdef SK_GAMMA_APPLY_TO_A8 | |
| float fDistanceAdjust = -1.f; | |
| UniformHandle fDistanceAdjustUni; | |
| #endif | |
| SkISize fAtlasSize = {0, 0}; | |
| UniformHandle fAtlasSizeInvUniform; | |
| typedef GrGLSLGeometryProcessor INHERITED; | |
| }; | |
| /////////////////////////////////////////////////////////////////////////////// | |
| GrDistanceFieldA8TextGeoProc::GrDistanceFieldA8TextGeoProc(const GrShaderCaps& caps, | |
| const sk_sp<GrTextureProxy>* proxies, | |
| int numProxies, | |
| const GrSamplerState& params, | |
| #ifdef SK_GAMMA_APPLY_TO_A8 | |
| float distanceAdjust, | |
| #endif | |
| uint32_t flags, | |
| const SkMatrix& localMatrix) | |
| : INHERITED(kGrDistanceFieldA8TextGeoProc_ClassID) | |
| , fLocalMatrix(localMatrix) | |
| , fFlags(flags & kNonLCD_DistanceFieldEffectMask) | |
| #ifdef SK_GAMMA_APPLY_TO_A8 | |
| , fDistanceAdjust(distanceAdjust) | |
| #endif | |
| { | |
| SkASSERT(numProxies <= kMaxTextures); | |
| SkASSERT(!(flags & ~kNonLCD_DistanceFieldEffectMask)); | |
| if (flags & kPerspective_DistanceFieldEffectFlag) { | |
| fInPosition = {"inPosition", kFloat3_GrVertexAttribType, kFloat3_GrSLType}; | |
| } else { | |
| fInPosition = {"inPosition", kFloat2_GrVertexAttribType, kFloat2_GrSLType}; | |
| } | |
| fInColor = {"inColor", kUByte4_norm_GrVertexAttribType, kHalf4_GrSLType }; | |
| fInTextureCoords = {"inTextureCoords", kUShort2_GrVertexAttribType, | |
| caps.integerSupport() ? kUShort2_GrSLType : kFloat2_GrSLType}; | |
| this->setVertexAttributes(&fInPosition, 3); | |
| if (numProxies) { | |
| fAtlasSize = proxies[0]->isize(); | |
| } | |
| for (int i = 0; i < numProxies; ++i) { | |
| SkASSERT(proxies[i]); | |
| SkASSERT(proxies[i]->isize() == fAtlasSize); | |
| fTextureSamplers[i].reset(proxies[i]->textureType(), proxies[i]->config(), params); | |
| } | |
| this->setTextureSamplerCnt(numProxies); | |
| } | |
| void GrDistanceFieldA8TextGeoProc::addNewProxies(const sk_sp<GrTextureProxy>* proxies, | |
| int numProxies, | |
| const GrSamplerState& params) { | |
| SkASSERT(numProxies <= kMaxTextures); | |
| if (!fTextureSamplers[0].isInitialized()) { | |
| fAtlasSize = proxies[0]->isize(); | |
| } | |
| for (int i = 0; i < numProxies; ++i) { | |
| SkASSERT(proxies[i]); | |
| SkASSERT(proxies[i]->isize() == fAtlasSize); | |
| if (!fTextureSamplers[i].isInitialized()) { | |
| fTextureSamplers[i].reset(proxies[i]->textureType(), proxies[i]->config(), params); | |
| } | |
| } | |
| this->setTextureSamplerCnt(numProxies); | |
| } | |
| void GrDistanceFieldA8TextGeoProc::getGLSLProcessorKey(const GrShaderCaps& caps, | |
| GrProcessorKeyBuilder* b) const { | |
| GrGLDistanceFieldA8TextGeoProc::GenKey(*this, caps, b); | |
| } | |
| GrGLSLPrimitiveProcessor* | |
| GrDistanceFieldA8TextGeoProc::createGLSLInstance(const GrShaderCaps&) const { | |
| return new GrGLDistanceFieldA8TextGeoProc(); | |
| } | |
| /////////////////////////////////////////////////////////////////////////////// | |
| GR_DEFINE_GEOMETRY_PROCESSOR_TEST(GrDistanceFieldA8TextGeoProc); | |
| #if GR_TEST_UTILS | |
| sk_sp<GrGeometryProcessor> GrDistanceFieldA8TextGeoProc::TestCreate(GrProcessorTestData* d) { | |
| int texIdx = d->fRandom->nextBool() ? GrProcessorUnitTest::kSkiaPMTextureIdx | |
| : GrProcessorUnitTest::kAlphaTextureIdx; | |
| sk_sp<GrTextureProxy> proxies[kMaxTextures] = { | |
| d->textureProxy(texIdx), | |
| nullptr, | |
| nullptr, | |
| nullptr | |
| }; | |
| GrSamplerState::WrapMode wrapModes[2]; | |
| GrTest::TestWrapModes(d->fRandom, wrapModes); | |
| GrSamplerState samplerState(wrapModes, d->fRandom->nextBool() | |
| ? GrSamplerState::Filter::kBilerp | |
| : GrSamplerState::Filter::kNearest); | |
| uint32_t flags = 0; | |
| flags |= d->fRandom->nextBool() ? kSimilarity_DistanceFieldEffectFlag : 0; | |
| if (flags & kSimilarity_DistanceFieldEffectFlag) { | |
| flags |= d->fRandom->nextBool() ? kScaleOnly_DistanceFieldEffectFlag : 0; | |
| } | |
| SkMatrix localMatrix = GrTest::TestMatrix(d->fRandom); | |
| #ifdef SK_GAMMA_APPLY_TO_A8 | |
| float lum = d->fRandom->nextF(); | |
| #endif | |
| return GrDistanceFieldA8TextGeoProc::Make(*d->caps()->shaderCaps(), | |
| proxies, 1, | |
| samplerState, | |
| #ifdef SK_GAMMA_APPLY_TO_A8 | |
| lum, | |
| #endif | |
| flags, localMatrix); | |
| } | |
| #endif | |
| /////////////////////////////////////////////////////////////////////////////// | |
| class GrGLDistanceFieldPathGeoProc : public GrGLSLGeometryProcessor { | |
| public: | |
| GrGLDistanceFieldPathGeoProc() | |
| : fMatrix(SkMatrix::InvalidMatrix()) | |
| , fAtlasSize({0,0}) { | |
| } | |
| void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override{ | |
| const GrDistanceFieldPathGeoProc& dfPathEffect = | |
| args.fGP.cast<GrDistanceFieldPathGeoProc>(); | |
| GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder; | |
| GrGLSLVertexBuilder* vertBuilder = args.fVertBuilder; | |
| GrGLSLVaryingHandler* varyingHandler = args.fVaryingHandler; | |
| GrGLSLUniformHandler* uniformHandler = args.fUniformHandler; | |
| // emit attributes | |
| varyingHandler->emitAttributes(dfPathEffect); | |
| const char* atlasSizeInvName; | |
| fAtlasSizeInvUniform = uniformHandler->addUniform(kVertex_GrShaderFlag, | |
| kFloat2_GrSLType, | |
| "AtlasSizeInv", | |
| &atlasSizeInvName); | |
| GrGLSLVarying uv(kFloat2_GrSLType); | |
| GrSLType texIdxType = args.fShaderCaps->integerSupport() ? kInt_GrSLType : kFloat_GrSLType; | |
| GrGLSLVarying texIdx(texIdxType); | |
| GrGLSLVarying st(kFloat2_GrSLType); | |
| append_index_uv_varyings(args, dfPathEffect.inTextureCoords().name(), atlasSizeInvName, &uv, | |
| &texIdx, &st); | |
| // setup pass through color | |
| varyingHandler->addPassThroughAttribute(dfPathEffect.inColor(), args.fOutputColor); | |
| if (dfPathEffect.matrix().hasPerspective()) { | |
| // Setup position | |
| this->writeOutputPosition(vertBuilder, | |
| uniformHandler, | |
| gpArgs, | |
| dfPathEffect.inPosition().name(), | |
| dfPathEffect.matrix(), | |
| &fMatrixUniform); | |
| // emit transforms | |
| this->emitTransforms(vertBuilder, | |
| varyingHandler, | |
| uniformHandler, | |
| dfPathEffect.inPosition().asShaderVar(), | |
| args.fFPCoordTransformHandler); | |
| } else { | |
| // Setup position | |
| this->writeOutputPosition(vertBuilder, gpArgs, dfPathEffect.inPosition().name()); | |
| // emit transforms | |
| this->emitTransforms(vertBuilder, | |
| varyingHandler, | |
| uniformHandler, | |
| dfPathEffect.inPosition().asShaderVar(), | |
| dfPathEffect.matrix(), | |
| args.fFPCoordTransformHandler); | |
| } | |
| // Use highp to work around aliasing issues | |
| fragBuilder->codeAppendf("float2 uv = %s;", uv.fsIn()); | |
| fragBuilder->codeAppend("half4 texColor;"); | |
| append_multitexture_lookup(args, dfPathEffect.numTextureSamplers(), texIdx, "uv", | |
| "texColor"); | |
| fragBuilder->codeAppend("half distance = " | |
| SK_DistanceFieldMultiplier "*(texColor.r - " SK_DistanceFieldThreshold ");"); | |
| fragBuilder->codeAppend("half afwidth;"); | |
| bool isUniformScale = (dfPathEffect.getFlags() & kUniformScale_DistanceFieldEffectMask) == | |
| kUniformScale_DistanceFieldEffectMask; | |
| bool isSimilarity = SkToBool(dfPathEffect.getFlags() & kSimilarity_DistanceFieldEffectFlag); | |
| bool isGammaCorrect = | |
| SkToBool(dfPathEffect.getFlags() & kGammaCorrect_DistanceFieldEffectFlag); | |
| if (isUniformScale) { | |
| // For uniform scale, we adjust for the effect of the transformation on the distance | |
| // by using the length of the gradient of the t coordinate in the y direction. | |
| // We use st coordinates to ensure we're mapping 1:1 from texel space to pixel space. | |
| // this gives us a smooth step across approximately one fragment | |
| #ifdef SK_VULKAN | |
| fragBuilder->codeAppendf("afwidth = abs(" SK_DistanceFieldAAFactor | |
| "*half(dFdx(%s.x)));", st.fsIn()); | |
| #else | |
| // We use the y gradient because there is a bug in the Mali 400 in the x direction. | |
| fragBuilder->codeAppendf("afwidth = abs(" SK_DistanceFieldAAFactor | |
| "*half(dFdy(%s.y)));", st.fsIn()); | |
| #endif | |
| } else if (isSimilarity) { | |
| // For similarity transform, we adjust the effect of the transformation on the distance | |
| // by using the length of the gradient of the texture coordinates. We use st coordinates | |
| // to ensure we're mapping 1:1 from texel space to pixel space. | |
| // this gives us a smooth step across approximately one fragment | |
| #ifdef SK_VULKAN | |
| fragBuilder->codeAppendf("half st_grad_len = half(length(dFdx(%s)));", st.fsIn()); | |
| #else | |
| // We use the y gradient because there is a bug in the Mali 400 in the x direction. | |
| fragBuilder->codeAppendf("half st_grad_len = half(length(dFdy(%s)));", st.fsIn()); | |
| #endif | |
| fragBuilder->codeAppend("afwidth = abs(" SK_DistanceFieldAAFactor "*st_grad_len);"); | |
| } else { | |
| // For general transforms, to determine the amount of correction we multiply a unit | |
| // vector pointing along the SDF gradient direction by the Jacobian of the st coords | |
| // (which is the inverse transform for this fragment) and take the length of the result. | |
| fragBuilder->codeAppend("half2 dist_grad = half2(dFdx(distance), " | |
| "dFdy(distance));"); | |
| // the length of the gradient may be 0, so we need to check for this | |
| // this also compensates for the Adreno, which likes to drop tiles on division by 0 | |
| fragBuilder->codeAppend("half dg_len2 = dot(dist_grad, dist_grad);"); | |
| fragBuilder->codeAppend("if (dg_len2 < 0.0001) {"); | |
| fragBuilder->codeAppend("dist_grad = half2(0.7071, 0.7071);"); | |
| fragBuilder->codeAppend("} else {"); | |
| fragBuilder->codeAppend("dist_grad = dist_grad*half(inversesqrt(dg_len2));"); | |
| fragBuilder->codeAppend("}"); | |
| fragBuilder->codeAppendf("half2 Jdx = half2(dFdx(%s));", st.fsIn()); | |
| fragBuilder->codeAppendf("half2 Jdy = half2(dFdy(%s));", st.fsIn()); | |
| fragBuilder->codeAppend("half2 grad = half2(dist_grad.x*Jdx.x + dist_grad.y*Jdy.x,"); | |
| fragBuilder->codeAppend(" dist_grad.x*Jdx.y + dist_grad.y*Jdy.y);"); | |
| // this gives us a smooth step across approximately one fragment | |
| fragBuilder->codeAppend("afwidth = " SK_DistanceFieldAAFactor "*length(grad);"); | |
| } | |
| // The smoothstep falloff compensates for the non-linear sRGB response curve. If we are | |
| // doing gamma-correct rendering (to an sRGB or F16 buffer), then we actually want distance | |
| // mapped linearly to coverage, so use a linear step: | |
| if (isGammaCorrect) { | |
| fragBuilder->codeAppend( | |
| "half val = saturate((distance + afwidth) / (2.0 * afwidth));"); | |
| } else { | |
| fragBuilder->codeAppend("half val = smoothstep(-afwidth, afwidth, distance);"); | |
| } | |
| fragBuilder->codeAppendf("%s = half4(val);", args.fOutputCoverage); | |
| } | |
| void setData(const GrGLSLProgramDataManager& pdman, const GrPrimitiveProcessor& proc, | |
| FPCoordTransformIter&& transformIter) override { | |
| const GrDistanceFieldPathGeoProc& dfpgp = proc.cast<GrDistanceFieldPathGeoProc>(); | |
| if (dfpgp.matrix().hasPerspective() && !fMatrix.cheapEqualTo(dfpgp.matrix())) { | |
| fMatrix = dfpgp.matrix(); | |
| float matrix[3 * 3]; | |
| GrGLSLGetMatrix<3>(matrix, fMatrix); | |
| pdman.setMatrix3f(fMatrixUniform, matrix); | |
| } | |
| const SkISize& atlasSize = dfpgp.atlasSize(); | |
| SkASSERT(SkIsPow2(atlasSize.fWidth) && SkIsPow2(atlasSize.fHeight)); | |
| if (fAtlasSize != atlasSize) { | |
| pdman.set2f(fAtlasSizeInvUniform, 1.0f / atlasSize.fWidth, 1.0f / atlasSize.fHeight); | |
| fAtlasSize = atlasSize; | |
| } | |
| if (dfpgp.matrix().hasPerspective()) { | |
| this->setTransformDataHelper(SkMatrix::I(), pdman, &transformIter); | |
| } else { | |
| this->setTransformDataHelper(dfpgp.matrix(), pdman, &transformIter); | |
| } | |
| } | |
| static inline void GenKey(const GrGeometryProcessor& gp, | |
| const GrShaderCaps&, | |
| GrProcessorKeyBuilder* b) { | |
| const GrDistanceFieldPathGeoProc& dfTexEffect = gp.cast<GrDistanceFieldPathGeoProc>(); | |
| uint32_t key = dfTexEffect.getFlags(); | |
| key |= ComputePosKey(dfTexEffect.matrix()) << 16; | |
| b->add32(key); | |
| b->add32(dfTexEffect.matrix().hasPerspective()); | |
| b->add32(dfTexEffect.numTextureSamplers()); | |
| } | |
| private: | |
| SkMatrix fMatrix; // view matrix if perspective, local matrix otherwise | |
| UniformHandle fMatrixUniform; | |
| SkISize fAtlasSize; | |
| UniformHandle fAtlasSizeInvUniform; | |
| typedef GrGLSLGeometryProcessor INHERITED; | |
| }; | |
| /////////////////////////////////////////////////////////////////////////////// | |
| GrDistanceFieldPathGeoProc::GrDistanceFieldPathGeoProc(const GrShaderCaps& caps, | |
| const SkMatrix& matrix, | |
| bool wideColor, | |
| const sk_sp<GrTextureProxy>* proxies, | |
| int numProxies, | |
| const GrSamplerState& params, | |
| uint32_t flags) | |
| : INHERITED(kGrDistanceFieldPathGeoProc_ClassID) | |
| , fMatrix(matrix) | |
| , fFlags(flags & kNonLCD_DistanceFieldEffectMask) { | |
| SkASSERT(numProxies <= kMaxTextures); | |
| SkASSERT(!(flags & ~kNonLCD_DistanceFieldEffectMask)); | |
| fInPosition = {"inPosition", kFloat2_GrVertexAttribType, kFloat2_GrSLType}; | |
| fInColor = MakeColorAttribute("inColor", wideColor); | |
| fInTextureCoords = {"inTextureCoords", kUShort2_GrVertexAttribType, | |
| caps.integerSupport() ? kUShort2_GrSLType : kFloat2_GrSLType}; | |
| this->setVertexAttributes(&fInPosition, 3); | |
| if (numProxies) { | |
| fAtlasSize = proxies[0]->isize(); | |
| } | |
| for (int i = 0; i < numProxies; ++i) { | |
| SkASSERT(proxies[i]); | |
| SkASSERT(proxies[i]->isize() == fAtlasSize); | |
| fTextureSamplers[i].reset(proxies[i]->textureType(), proxies[i]->config(), params); | |
| } | |
| this->setTextureSamplerCnt(numProxies); | |
| } | |
| void GrDistanceFieldPathGeoProc::addNewProxies(const sk_sp<GrTextureProxy>* proxies, | |
| int numProxies, | |
| const GrSamplerState& params) { | |
| SkASSERT(numProxies <= kMaxTextures); | |
| if (!fTextureSamplers[0].isInitialized()) { | |
| fAtlasSize = proxies[0]->isize(); | |
| } | |
| for (int i = 0; i < numProxies; ++i) { | |
| SkASSERT(proxies[i]); | |
| SkASSERT(proxies[i]->isize() == fAtlasSize); | |
| if (!fTextureSamplers[i].isInitialized()) { | |
| fTextureSamplers[i].reset(proxies[i]->textureType(), proxies[i]->config(), params); | |
| } | |
| } | |
| this->setTextureSamplerCnt(numProxies); | |
| } | |
| void GrDistanceFieldPathGeoProc::getGLSLProcessorKey(const GrShaderCaps& caps, | |
| GrProcessorKeyBuilder* b) const { | |
| GrGLDistanceFieldPathGeoProc::GenKey(*this, caps, b); | |
| } | |
| GrGLSLPrimitiveProcessor* | |
| GrDistanceFieldPathGeoProc::createGLSLInstance(const GrShaderCaps&) const { | |
| return new GrGLDistanceFieldPathGeoProc(); | |
| } | |
| /////////////////////////////////////////////////////////////////////////////// | |
| GR_DEFINE_GEOMETRY_PROCESSOR_TEST(GrDistanceFieldPathGeoProc); | |
| #if GR_TEST_UTILS | |
| sk_sp<GrGeometryProcessor> GrDistanceFieldPathGeoProc::TestCreate(GrProcessorTestData* d) { | |
| int texIdx = d->fRandom->nextBool() ? GrProcessorUnitTest::kSkiaPMTextureIdx | |
| : GrProcessorUnitTest::kAlphaTextureIdx; | |
| sk_sp<GrTextureProxy> proxies[kMaxTextures] = { | |
| d->textureProxy(texIdx), | |
| nullptr, | |
| nullptr, | |
| nullptr | |
| }; | |
| GrSamplerState::WrapMode wrapModes[2]; | |
| GrTest::TestWrapModes(d->fRandom, wrapModes); | |
| GrSamplerState samplerState(wrapModes, d->fRandom->nextBool() | |
| ? GrSamplerState::Filter::kBilerp | |
| : GrSamplerState::Filter::kNearest); | |
| uint32_t flags = 0; | |
| flags |= d->fRandom->nextBool() ? kSimilarity_DistanceFieldEffectFlag : 0; | |
| if (flags & kSimilarity_DistanceFieldEffectFlag) { | |
| flags |= d->fRandom->nextBool() ? kScaleOnly_DistanceFieldEffectFlag : 0; | |
| } | |
| return GrDistanceFieldPathGeoProc::Make(*d->caps()->shaderCaps(), | |
| GrTest::TestMatrix(d->fRandom), | |
| d->fRandom->nextBool(), | |
| proxies, 1, | |
| samplerState, | |
| flags); | |
| } | |
| #endif | |
| /////////////////////////////////////////////////////////////////////////////// | |
| class GrGLDistanceFieldLCDTextGeoProc : public GrGLSLGeometryProcessor { | |
| public: | |
| GrGLDistanceFieldLCDTextGeoProc() : fAtlasSize({0, 0}) { | |
| fDistanceAdjust = GrDistanceFieldLCDTextGeoProc::DistanceAdjust::Make(1.0f, 1.0f, 1.0f); | |
| } | |
| void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override{ | |
| const GrDistanceFieldLCDTextGeoProc& dfTexEffect = | |
| args.fGP.cast<GrDistanceFieldLCDTextGeoProc>(); | |
| GrGLSLVertexBuilder* vertBuilder = args.fVertBuilder; | |
| GrGLSLVaryingHandler* varyingHandler = args.fVaryingHandler; | |
| GrGLSLUniformHandler* uniformHandler = args.fUniformHandler; | |
| // emit attributes | |
| varyingHandler->emitAttributes(dfTexEffect); | |
| const char* atlasSizeInvName; | |
| fAtlasSizeInvUniform = uniformHandler->addUniform(kVertex_GrShaderFlag, | |
| kFloat2_GrSLType, | |
| "AtlasSizeInv", | |
| &atlasSizeInvName); | |
| GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder; | |
| // setup pass through color | |
| varyingHandler->addPassThroughAttribute(dfTexEffect.inColor(), args.fOutputColor); | |
| // Setup position | |
| gpArgs->fPositionVar = dfTexEffect.inPosition().asShaderVar(); | |
| // emit transforms | |
| this->emitTransforms(vertBuilder, | |
| varyingHandler, | |
| uniformHandler, | |
| dfTexEffect.inPosition().asShaderVar(), | |
| dfTexEffect.localMatrix(), | |
| args.fFPCoordTransformHandler); | |
| // set up varyings | |
| GrGLSLVarying uv(kFloat2_GrSLType); | |
| GrSLType texIdxType = args.fShaderCaps->integerSupport() ? kInt_GrSLType : kFloat_GrSLType; | |
| GrGLSLVarying texIdx(texIdxType); | |
| GrGLSLVarying st(kFloat2_GrSLType); | |
| append_index_uv_varyings(args, dfTexEffect.inTextureCoords().name(), atlasSizeInvName, &uv, | |
| &texIdx, &st); | |
| GrGLSLVarying delta(kFloat_GrSLType); | |
| varyingHandler->addVarying("Delta", &delta); | |
| if (dfTexEffect.getFlags() & kBGR_DistanceFieldEffectFlag) { | |
| vertBuilder->codeAppendf("%s = -%s.x/3.0;", delta.vsOut(), atlasSizeInvName); | |
| } else { | |
| vertBuilder->codeAppendf("%s = %s.x/3.0;", delta.vsOut(), atlasSizeInvName); | |
| } | |
| // add frag shader code | |
| bool isUniformScale = (dfTexEffect.getFlags() & kUniformScale_DistanceFieldEffectMask) == | |
| kUniformScale_DistanceFieldEffectMask; | |
| bool isSimilarity = SkToBool(dfTexEffect.getFlags() & kSimilarity_DistanceFieldEffectFlag); | |
| bool isGammaCorrect = | |
| SkToBool(dfTexEffect.getFlags() & kGammaCorrect_DistanceFieldEffectFlag); | |
| // create LCD offset adjusted by inverse of transform | |
| // Use highp to work around aliasing issues | |
| fragBuilder->codeAppendf("float2 uv = %s;\n", uv.fsIn()); | |
| if (isUniformScale) { | |
| #ifdef SK_VULKAN | |
| fragBuilder->codeAppendf("half st_grad_len = half(abs(dFdx(%s.x)));", st.fsIn()); | |
| #else | |
| // We use the y gradient because there is a bug in the Mali 400 in the x direction. | |
| fragBuilder->codeAppendf("half st_grad_len = half(abs(dFdy(%s.y)));", st.fsIn()); | |
| #endif | |
| fragBuilder->codeAppendf("half2 offset = half2(half(st_grad_len*%s), 0.0);", | |
| delta.fsIn()); | |
| } else if (isSimilarity) { | |
| // For a similarity matrix with rotation, the gradient will not be aligned | |
| // with the texel coordinate axes, so we need to calculate it. | |
| #ifdef SK_VULKAN | |
| fragBuilder->codeAppendf("half2 st_grad = half2(dFdx(%s));", st.fsIn()); | |
| fragBuilder->codeAppendf("half2 offset = half(%s)*st_grad;", delta.fsIn()); | |
| #else | |
| // We use dFdy because of a Mali 400 bug, and rotate -90 degrees to | |
| // get the gradient in the x direction. | |
| fragBuilder->codeAppendf("half2 st_grad = half2(dFdy(%s));", st.fsIn()); | |
| fragBuilder->codeAppendf("half2 offset = half2(%s*float2(st_grad.y, -st_grad.x));", | |
| delta.fsIn()); | |
| #endif | |
| fragBuilder->codeAppend("half st_grad_len = length(st_grad);"); | |
| } else { | |
| fragBuilder->codeAppendf("half2 st = half2(%s);\n", st.fsIn()); | |
| fragBuilder->codeAppend("half2 Jdx = half2(dFdx(st));"); | |
| fragBuilder->codeAppend("half2 Jdy = half2(dFdy(st));"); | |
| fragBuilder->codeAppendf("half2 offset = half2(half(%s))*Jdx;", delta.fsIn()); | |
| } | |
| // sample the texture by index | |
| fragBuilder->codeAppend("half4 texColor;"); | |
| append_multitexture_lookup(args, dfTexEffect.numTextureSamplers(), | |
| texIdx, "uv", "texColor"); | |
| // green is distance to uv center | |
| fragBuilder->codeAppend("half3 distance;"); | |
| fragBuilder->codeAppend("distance.y = texColor.r;"); | |
| // red is distance to left offset | |
| fragBuilder->codeAppend("half2 uv_adjusted = half2(uv) - offset;"); | |
| append_multitexture_lookup(args, dfTexEffect.numTextureSamplers(), | |
| texIdx, "uv_adjusted", "texColor"); | |
| fragBuilder->codeAppend("distance.x = texColor.r;"); | |
| // blue is distance to right offset | |
| fragBuilder->codeAppend("uv_adjusted = half2(uv) + offset;"); | |
| append_multitexture_lookup(args, dfTexEffect.numTextureSamplers(), | |
| texIdx, "uv_adjusted", "texColor"); | |
| fragBuilder->codeAppend("distance.z = texColor.r;"); | |
| fragBuilder->codeAppend("distance = " | |
| "half3(" SK_DistanceFieldMultiplier ")*(distance - half3(" SK_DistanceFieldThreshold"));"); | |
| // adjust width based on gamma | |
| const char* distanceAdjustUniName = nullptr; | |
| fDistanceAdjustUni = uniformHandler->addUniform(kFragment_GrShaderFlag, kHalf3_GrSLType, | |
| "DistanceAdjust", &distanceAdjustUniName); | |
| fragBuilder->codeAppendf("distance -= %s;", distanceAdjustUniName); | |
| // To be strictly correct, we should compute the anti-aliasing factor separately | |
| // for each color component. However, this is only important when using perspective | |
| // transformations, and even then using a single factor seems like a reasonable | |
| // trade-off between quality and speed. | |
| fragBuilder->codeAppend("half afwidth;"); | |
| if (isSimilarity) { | |
| // For similarity transform (uniform scale-only is a subset of this), we adjust for the | |
| // effect of the transformation on the distance by using the length of the gradient of | |
| // the texture coordinates. We use st coordinates to ensure we're mapping 1:1 from texel | |
| // space to pixel space. | |
| // this gives us a smooth step across approximately one fragment | |
| fragBuilder->codeAppend("afwidth = " SK_DistanceFieldAAFactor "*st_grad_len;"); | |
| } else { | |
| // For general transforms, to determine the amount of correction we multiply a unit | |
| // vector pointing along the SDF gradient direction by the Jacobian of the st coords | |
| // (which is the inverse transform for this fragment) and take the length of the result. | |
| fragBuilder->codeAppend("half2 dist_grad = half2(half(dFdx(distance.r)), " | |
| "half(dFdy(distance.r)));"); | |
| // the length of the gradient may be 0, so we need to check for this | |
| // this also compensates for the Adreno, which likes to drop tiles on division by 0 | |
| fragBuilder->codeAppend("half dg_len2 = dot(dist_grad, dist_grad);"); | |
| fragBuilder->codeAppend("if (dg_len2 < 0.0001) {"); | |
| fragBuilder->codeAppend("dist_grad = half2(0.7071, 0.7071);"); | |
| fragBuilder->codeAppend("} else {"); | |
| fragBuilder->codeAppend("dist_grad = dist_grad*half(inversesqrt(dg_len2));"); | |
| fragBuilder->codeAppend("}"); | |
| fragBuilder->codeAppend("half2 grad = half2(dist_grad.x*Jdx.x + dist_grad.y*Jdy.x,"); | |
| fragBuilder->codeAppend(" dist_grad.x*Jdx.y + dist_grad.y*Jdy.y);"); | |
| // this gives us a smooth step across approximately one fragment | |
| fragBuilder->codeAppend("afwidth = " SK_DistanceFieldAAFactor "*length(grad);"); | |
| } | |
| // The smoothstep falloff compensates for the non-linear sRGB response curve. If we are | |
| // doing gamma-correct rendering (to an sRGB or F16 buffer), then we actually want distance | |
| // mapped linearly to coverage, so use a linear step: | |
| if (isGammaCorrect) { | |
| fragBuilder->codeAppendf("%s = " | |
| "half4(saturate((distance + half3(afwidth)) / half3(2.0 * afwidth)), 1.0);", | |
| args.fOutputCoverage); | |
| } else { | |
| fragBuilder->codeAppendf( | |
| "%s = half4(smoothstep(half3(-afwidth), half3(afwidth), distance), 1.0);", | |
| args.fOutputCoverage); | |
| } | |
| } | |
| void setData(const GrGLSLProgramDataManager& pdman, const GrPrimitiveProcessor& processor, | |
| FPCoordTransformIter&& transformIter) override { | |
| SkASSERT(fDistanceAdjustUni.isValid()); | |
| const GrDistanceFieldLCDTextGeoProc& dflcd = processor.cast<GrDistanceFieldLCDTextGeoProc>(); | |
| GrDistanceFieldLCDTextGeoProc::DistanceAdjust wa = dflcd.getDistanceAdjust(); | |
| if (wa != fDistanceAdjust) { | |
| pdman.set3f(fDistanceAdjustUni, | |
| wa.fR, | |
| wa.fG, | |
| wa.fB); | |
| fDistanceAdjust = wa; | |
| } | |
| const SkISize& atlasSize = dflcd.atlasSize(); | |
| SkASSERT(SkIsPow2(atlasSize.fWidth) && SkIsPow2(atlasSize.fHeight)); | |
| if (fAtlasSize != atlasSize) { | |
| pdman.set2f(fAtlasSizeInvUniform, 1.0f / atlasSize.fWidth, 1.0f / atlasSize.fHeight); | |
| fAtlasSize = atlasSize; | |
| } | |
| this->setTransformDataHelper(dflcd.localMatrix(), pdman, &transformIter); | |
| } | |
| static inline void GenKey(const GrGeometryProcessor& gp, | |
| const GrShaderCaps&, | |
| GrProcessorKeyBuilder* b) { | |
| const GrDistanceFieldLCDTextGeoProc& dfTexEffect = gp.cast<GrDistanceFieldLCDTextGeoProc>(); | |
| uint32_t key = dfTexEffect.getFlags(); | |
| b->add32(key); | |
| b->add32(dfTexEffect.numTextureSamplers()); | |
| } | |
| private: | |
| GrDistanceFieldLCDTextGeoProc::DistanceAdjust fDistanceAdjust; | |
| UniformHandle fDistanceAdjustUni; | |
| SkISize fAtlasSize; | |
| UniformHandle fAtlasSizeInvUniform; | |
| typedef GrGLSLGeometryProcessor INHERITED; | |
| }; | |
| /////////////////////////////////////////////////////////////////////////////// | |
| GrDistanceFieldLCDTextGeoProc::GrDistanceFieldLCDTextGeoProc(const GrShaderCaps& caps, | |
| const sk_sp<GrTextureProxy>* proxies, | |
| int numProxies, | |
| const GrSamplerState& params, | |
| DistanceAdjust distanceAdjust, | |
| uint32_t flags, | |
| const SkMatrix& localMatrix) | |
| : INHERITED(kGrDistanceFieldLCDTextGeoProc_ClassID) | |
| , fLocalMatrix(localMatrix) | |
| , fDistanceAdjust(distanceAdjust) | |
| , fFlags(flags & kLCD_DistanceFieldEffectMask) { | |
| SkASSERT(numProxies <= kMaxTextures); | |
| SkASSERT(!(flags & ~kLCD_DistanceFieldEffectMask) && (flags & kUseLCD_DistanceFieldEffectFlag)); | |
| if (fFlags & kPerspective_DistanceFieldEffectFlag) { | |
| fInPosition = {"inPosition", kFloat3_GrVertexAttribType, kFloat3_GrSLType}; | |
| } else { | |
| fInPosition = {"inPosition", kFloat2_GrVertexAttribType, kFloat2_GrSLType}; | |
| } | |
| fInColor = {"inColor", kUByte4_norm_GrVertexAttribType, kHalf4_GrSLType}; | |
| fInTextureCoords = {"inTextureCoords", kUShort2_GrVertexAttribType, | |
| caps.integerSupport() ? kUShort2_GrSLType : kFloat2_GrSLType}; | |
| this->setVertexAttributes(&fInPosition, 3); | |
| if (numProxies) { | |
| fAtlasSize = proxies[0]->isize(); | |
| } | |
| for (int i = 0; i < numProxies; ++i) { | |
| SkASSERT(proxies[i]); | |
| SkASSERT(proxies[i]->isize() == fAtlasSize); | |
| fTextureSamplers[i].reset(proxies[i]->textureType(), proxies[i]->config(), params); | |
| } | |
| this->setTextureSamplerCnt(numProxies); | |
| } | |
| void GrDistanceFieldLCDTextGeoProc::addNewProxies(const sk_sp<GrTextureProxy>* proxies, | |
| int numProxies, | |
| const GrSamplerState& params) { | |
| SkASSERT(numProxies <= kMaxTextures); | |
| if (!fTextureSamplers[0].isInitialized()) { | |
| fAtlasSize = proxies[0]->isize(); | |
| } | |
| for (int i = 0; i < numProxies; ++i) { | |
| SkASSERT(proxies[i]); | |
| SkASSERT(proxies[i]->isize() == fAtlasSize); | |
| if (!fTextureSamplers[i].isInitialized()) { | |
| fTextureSamplers[i].reset(proxies[i]->textureType(), proxies[i]->config(), params); | |
| } | |
| } | |
| this->setTextureSamplerCnt(numProxies); | |
| } | |
| void GrDistanceFieldLCDTextGeoProc::getGLSLProcessorKey(const GrShaderCaps& caps, | |
| GrProcessorKeyBuilder* b) const { | |
| GrGLDistanceFieldLCDTextGeoProc::GenKey(*this, caps, b); | |
| } | |
| GrGLSLPrimitiveProcessor* GrDistanceFieldLCDTextGeoProc::createGLSLInstance(const GrShaderCaps&) const { | |
| return new GrGLDistanceFieldLCDTextGeoProc(); | |
| } | |
| /////////////////////////////////////////////////////////////////////////////// | |
| GR_DEFINE_GEOMETRY_PROCESSOR_TEST(GrDistanceFieldLCDTextGeoProc); | |
| #if GR_TEST_UTILS | |
| sk_sp<GrGeometryProcessor> GrDistanceFieldLCDTextGeoProc::TestCreate(GrProcessorTestData* d) { | |
| int texIdx = d->fRandom->nextBool() ? GrProcessorUnitTest::kSkiaPMTextureIdx : | |
| GrProcessorUnitTest::kAlphaTextureIdx; | |
| sk_sp<GrTextureProxy> proxies[kMaxTextures] = { | |
| d->textureProxy(texIdx), | |
| nullptr, | |
| nullptr, | |
| nullptr | |
| }; | |
| GrSamplerState::WrapMode wrapModes[2]; | |
| GrTest::TestWrapModes(d->fRandom, wrapModes); | |
| GrSamplerState samplerState(wrapModes, d->fRandom->nextBool() | |
| ? GrSamplerState::Filter::kBilerp | |
| : GrSamplerState::Filter::kNearest); | |
| DistanceAdjust wa = { 0.0f, 0.1f, -0.1f }; | |
| uint32_t flags = kUseLCD_DistanceFieldEffectFlag; | |
| flags |= d->fRandom->nextBool() ? kSimilarity_DistanceFieldEffectFlag : 0; | |
| if (flags & kSimilarity_DistanceFieldEffectFlag) { | |
| flags |= d->fRandom->nextBool() ? kScaleOnly_DistanceFieldEffectFlag : 0; | |
| } | |
| flags |= d->fRandom->nextBool() ? kBGR_DistanceFieldEffectFlag : 0; | |
| SkMatrix localMatrix = GrTest::TestMatrix(d->fRandom); | |
| return GrDistanceFieldLCDTextGeoProc::Make(*d->caps()->shaderCaps(), proxies, 1, samplerState, | |
| wa, flags, localMatrix); | |
| } | |
| #endif |