/* * Copyright 2021 Google LLC * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "gm/gm.h" #include "include/core/SkBitmap.h" #include "include/core/SkCanvas.h" #include "include/core/SkData.h" #include "include/core/SkFont.h" #include "include/core/SkPaint.h" #include "include/core/SkSize.h" #include "include/core/SkString.h" #include "include/core/SkSurface.h" #include "include/effects/SkGradientShader.h" #include "include/effects/SkImageFilters.h" #include "include/effects/SkRuntimeEffect.h" #include "include/private/SkSLDefines.h" // for kDefaultInlineThreshold #include "include/utils/SkRandom.h" #include "src/core/SkRuntimeEffectPriv.h" #include "src/gpu/GrCaps.h" #include "src/gpu/GrDirectContextPriv.h" #include "tests/Test.h" #include "tools/Resources.h" #include "tools/ToolUtils.h" static constexpr int kWidth = 2; static constexpr int kHeight = 2; template static void set_uniform(SkRuntimeShaderBuilder* builder, const char* name, const T& value) { SkRuntimeShaderBuilder::BuilderUniform uniform = builder->uniform(name); if (uniform.fVar) { uniform = value; } } static void test_one_permutation(skiatest::Reporter* r, SkSurface* surface, const char* testFile, const char* permutationSuffix, const SkRuntimeEffect::Options& options) { SkString resourcePath = SkStringPrintf("sksl/%s", testFile); sk_sp shaderData = GetResourceAsData(resourcePath.c_str()); if (!shaderData) { ERRORF(r, "%s%s: Unable to load file", testFile, permutationSuffix); return; } SkString shaderString{reinterpret_cast(shaderData->bytes()), shaderData->size()}; SkRuntimeEffect::Result result = SkRuntimeEffect::MakeForShader(shaderString, options); if (!result.effect) { ERRORF(r, "%s%s: %s", testFile, permutationSuffix, result.errorText.c_str()); return; } SkRuntimeShaderBuilder builder(result.effect); set_uniform(&builder, "colorBlack", SkV4{0, 0, 0, 1}); set_uniform(&builder, "colorRed", SkV4{1, 0, 0, 1}); set_uniform(&builder, "colorGreen", SkV4{0, 1, 0, 1}); set_uniform(&builder, "colorBlue", SkV4{0, 0, 1, 1}); set_uniform(&builder, "colorWhite", SkV4{1, 1, 1, 1}); set_uniform(&builder, "testInputs", SkV4{-1.25, 0, 0.75, 2.25}); set_uniform(&builder, "testMatrix2x2", std::array{1, 2, 3, 4}); set_uniform(&builder, "testMatrix3x3", std::array{1, 2, 3, 4, 5, 6, 7, 8, 9}); set_uniform(&builder, "unknownInput", 1.0f); set_uniform(&builder, "testMatrix2x2", std::array{1, 2, 3, 4}); set_uniform(&builder, "testMatrix3x3", std::array{1, 2, 3, 4, 5, 6, 7, 8, 9}); sk_sp shader = builder.makeShader(/*localMatrix=*/nullptr, /*isOpaque=*/true); if (!shader) { ERRORF(r, "%s%s: Unable to build shader", testFile, permutationSuffix); return; } SkPaint paintShader; paintShader.setShader(shader); surface->getCanvas()->drawRect(SkRect::MakeWH(kWidth, kHeight), paintShader); SkBitmap bitmap; REPORTER_ASSERT(r, bitmap.tryAllocPixels(surface->imageInfo())); REPORTER_ASSERT(r, surface->readPixels(bitmap.info(), bitmap.getPixels(), bitmap.rowBytes(), /*srcX=*/0, /*srcY=*/0)); bool success = true; SkColor color[kHeight][kWidth]; for (int y = 0; y < kHeight; ++y) { for (int x = 0; x < kWidth; ++x) { color[y][x] = bitmap.getColor(x, y); if (color[y][x] != SkColorSetARGB(0xFF, 0x00, 0xFF, 0x00)) { success = false; } } } if (!success) { static_assert(kWidth == 2); static_assert(kHeight == 2); ERRORF(r, "Expected: solid green. Actual:\n" "RRGGBBAA RRGGBBAA\n" "%02X%02X%02X%02X %02X%02X%02X%02X\n" "%02X%02X%02X%02X %02X%02X%02X%02X", SkColorGetR(color[0][0]), SkColorGetG(color[0][0]), SkColorGetB(color[0][0]), SkColorGetA(color[0][0]), SkColorGetR(color[0][1]), SkColorGetG(color[0][1]), SkColorGetB(color[0][1]), SkColorGetA(color[0][1]), SkColorGetR(color[1][0]), SkColorGetG(color[1][0]), SkColorGetB(color[1][0]), SkColorGetA(color[1][0]), SkColorGetR(color[1][1]), SkColorGetG(color[1][1]), SkColorGetB(color[1][1]), SkColorGetA(color[1][1])); } } static void test_permutations(skiatest::Reporter* r, SkSurface* surface, const char* testFile, bool worksInES2) { SkRuntimeEffect::Options options = worksInES2 ? SkRuntimeEffect::Options{} : SkRuntimeEffectPriv::ES3Options(); options.forceNoInline = false; test_one_permutation(r, surface, testFile, "", options); options.forceNoInline = true; test_one_permutation(r, surface, testFile, " (NoInline)", options); } static void test_cpu(skiatest::Reporter* r, const char* testFile) { const SkImageInfo info = SkImageInfo::MakeN32Premul(kWidth, kHeight); sk_sp surface(SkSurface::MakeRaster(info)); test_permutations(r, surface.get(), testFile, /*worksInES2=*/true); } static void test_gpu(skiatest::Reporter* r, GrDirectContext* ctx, const char* testFile) { const SkImageInfo info = SkImageInfo::MakeN32Premul(kWidth, kHeight); sk_sp surface(SkSurface::MakeRenderTarget(ctx, SkBudgeted::kNo, info)); test_permutations(r, surface.get(), testFile, /*worksInES2=*/true); } static void test_es3(skiatest::Reporter* r, GrDirectContext* ctx, const char* testFile) { if (!ctx->priv().caps()->shaderCaps()->supportsSkSLES3()) { return; } // ES3-only tests never run on the CPU, because SkVM lacks support for many non-ES2 features. const SkImageInfo info = SkImageInfo::MakeN32Premul(kWidth, kHeight); sk_sp surface(SkSurface::MakeRenderTarget(ctx, SkBudgeted::kNo, info)); test_permutations(r, surface.get(), testFile, /*worksInES2=*/false); } #define SKSL_TEST_CPU(name, path) \ DEF_TEST(name ## _CPU, r) { \ test_cpu(r, path); \ } #define SKSL_TEST_GPU(name, path) \ DEF_GPUTEST_FOR_RENDERING_CONTEXTS(name ## _GPU, r, ctxInfo) { \ test_gpu(r, ctxInfo.directContext(), path); \ } #define SKSL_TEST_ES3(name, path) \ DEF_GPUTEST_FOR_RENDERING_CONTEXTS(name ## _GPU, r, ctxInfo) { \ test_es3(r, ctxInfo.directContext(), path); \ } #define SKSL_TEST(name, path) SKSL_TEST_CPU(name, path) SKSL_TEST_GPU(name, path) SKSL_TEST(SkSLAssignmentOps, "folding/AssignmentOps.sksl") SKSL_TEST(SkSLBoolFolding, "folding/BoolFolding.sksl") SKSL_TEST(SkSLCastFolding, "folding/CastFolding.sksl") SKSL_TEST(SkSLIntFoldingES2, "folding/IntFoldingES2.sksl") SKSL_TEST_ES3(SkSLIntFoldingES3, "folding/IntFoldingES3.sksl") SKSL_TEST(SkSLFloatFolding, "folding/FloatFolding.sksl") // skbug.com/11919: Fails on Nexus5/7, and Intel GPUs SKSL_TEST_CPU(SkSLMatrixFoldingES2, "folding/MatrixFoldingES2.sksl") SKSL_TEST(SkSLSelfAssignment, "folding/SelfAssignment.sksl") SKSL_TEST(SkSLShortCircuitBoolFolding, "folding/ShortCircuitBoolFolding.sksl") SKSL_TEST(SkSLSwizzleFolding, "folding/SwizzleFolding.sksl") SKSL_TEST(SkSLVectorScalarFolding, "folding/VectorScalarFolding.sksl") SKSL_TEST(SkSLVectorVectorFolding, "folding/VectorVectorFolding.sksl") SKSL_TEST_ES3(SkSLDoWhileBodyMustBeInlinedIntoAScope, "inliner/DoWhileBodyMustBeInlinedIntoAScope.sksl") SKSL_TEST_ES3(SkSLDoWhileTestCannotBeInlined, "inliner/DoWhileTestCannotBeInlined.sksl") SKSL_TEST(SkSLForBodyMustBeInlinedIntoAScope, "inliner/ForBodyMustBeInlinedIntoAScope.sksl") SKSL_TEST_ES3(SkSLForInitializerExpressionsCanBeInlined, "inliner/ForInitializerExpressionsCanBeInlined.sksl") SKSL_TEST(SkSLForWithoutReturnInsideCanBeInlined, "inliner/ForWithoutReturnInsideCanBeInlined.sksl") SKSL_TEST(SkSLForWithReturnInsideCannotBeInlined, "inliner/ForWithReturnInsideCannotBeInlined.sksl") SKSL_TEST(SkSLIfBodyMustBeInlinedIntoAScope, "inliner/IfBodyMustBeInlinedIntoAScope.sksl") SKSL_TEST(SkSLIfElseBodyMustBeInlinedIntoAScope, "inliner/IfElseBodyMustBeInlinedIntoAScope.sksl") SKSL_TEST(SkSLIfElseChainWithReturnsCanBeInlined, "inliner/IfElseChainWithReturnsCanBeInlined.sksl") SKSL_TEST(SkSLIfTestCanBeInlined, "inliner/IfTestCanBeInlined.sksl") SKSL_TEST(SkSLIfWithReturnsCanBeInlined, "inliner/IfWithReturnsCanBeInlined.sksl") SKSL_TEST(SkSLInlineKeywordOverridesThreshold, "inliner/InlineKeywordOverridesThreshold.sksl") SKSL_TEST(SkSLInlinerAvoidsVariableNameOverlap, "inliner/InlinerAvoidsVariableNameOverlap.sksl") SKSL_TEST(SkSLInlinerElidesTempVarForReturnsInsideBlock, "inliner/InlinerElidesTempVarForReturnsInsideBlock.sksl") SKSL_TEST(SkSLInlinerUsesTempVarForMultipleReturns, "inliner/InlinerUsesTempVarForMultipleReturns.sksl") SKSL_TEST(SkSLInlinerUsesTempVarForReturnsInsideBlockWithVar, "inliner/InlinerUsesTempVarForReturnsInsideBlockWithVar.sksl") SKSL_TEST(SkSLInlineThreshold, "inliner/InlineThreshold.sksl") // skbug.com/11919: Fails on Adreno + Vulkan SKSL_TEST_CPU(SkSLInlineWithInoutArgument, "inliner/InlineWithInoutArgument.sksl") SKSL_TEST(SkSLInlineWithModifiedArgument, "inliner/InlineWithModifiedArgument.sksl") SKSL_TEST(SkSLInlineWithNestedBigCalls, "inliner/InlineWithNestedBigCalls.sksl") SKSL_TEST(SkSLInlineWithUnmodifiedArgument, "inliner/InlineWithUnmodifiedArgument.sksl") SKSL_TEST(SkSLInlineWithUnnecessaryBlocks, "inliner/InlineWithUnnecessaryBlocks.sksl") SKSL_TEST(SkSLNoInline, "inliner/NoInline.sksl") SKSL_TEST(SkSLShortCircuitEvaluationsCannotInlineRightHandSide, "inliner/ShortCircuitEvaluationsCannotInlineRightHandSide.sksl") SKSL_TEST_ES3(SkSLStaticSwitchInline, "inliner/StaticSwitch.sksl") SKSL_TEST(SkSLStructsCanBeInlinedSafely, "inliner/StructsCanBeInlinedSafely.sksl") SKSL_TEST(SkSLSwizzleCanBeInlinedDirectly, "inliner/SwizzleCanBeInlinedDirectly.sksl") SKSL_TEST(SkSLTernaryResultsCannotBeInlined, "inliner/TernaryResultsCannotBeInlined.sksl") SKSL_TEST(SkSLTernaryTestCanBeInlined, "inliner/TernaryTestCanBeInlined.sksl") SKSL_TEST(SkSLTrivialArgumentsInlineDirectly, "inliner/TrivialArgumentsInlineDirectly.sksl") SKSL_TEST_ES3(SkSLWhileBodyMustBeInlinedIntoAScope, "inliner/WhileBodyMustBeInlinedIntoAScope.sksl") SKSL_TEST_ES3(SkSLWhileTestCannotBeInlined, "inliner/WhileTestCannotBeInlined.sksl") // TODO(skia:11052): SPIR-V does not yet honor `out` param semantics correctly SKSL_TEST_CPU(SkSLInlinerHonorsGLSLOutParamSemantics, "inliner/InlinerHonorsGLSLOutParamSemantics.sksl") SKSL_TEST(SkSLIntrinsicAbsFloat, "intrinsics/AbsFloat.sksl") SKSL_TEST(SkSLIntrinsicCeil, "intrinsics/Ceil.sksl") SKSL_TEST_ES3(SkSLIntrinsicDeterminant, "intrinsics/Determinant.sksl") SKSL_TEST_ES3(SkSLIntrinsicDFdx, "intrinsics/DFdx.sksl") SKSL_TEST_ES3(SkSLIntrinsicDFdy, "intrinsics/DFdy.sksl") SKSL_TEST_ES3(SkSLIntrinsicFloatBitsToInt, "intrinsics/FloatBitsToInt.sksl") SKSL_TEST_ES3(SkSLIntrinsicFloatBitsToUint, "intrinsics/FloatBitsToUint.sksl") SKSL_TEST_ES3(SkSLIntrinsicFwidth, "intrinsics/Fwidth.sksl") SKSL_TEST_ES3(SkSLIntrinsicIntBitsToFloat, "intrinsics/IntBitsToFloat.sksl") SKSL_TEST_ES3(SkSLIntrinsicIsInf, "intrinsics/IsInf.sksl") // Fails on Adreno 6xx + Vulkan SKSL_TEST_CPU(SkSLIntrinsicClampFloat, "intrinsics/ClampFloat.sksl") SKSL_TEST(SkSLIntrinsicMatrixCompMultES2, "intrinsics/MatrixCompMultES2.sksl") SKSL_TEST_ES3(SkSLIntrinsicMatrixCompMultES3, "intrinsics/MatrixCompMultES3.sksl") SKSL_TEST(SkSLIntrinsicMaxFloat, "intrinsics/MaxFloat.sksl") SKSL_TEST(SkSLIntrinsicMinFloat, "intrinsics/MinFloat.sksl") // Fails on Adreno + Vulkan (skia:11919) SKSL_TEST_CPU(SkSLIntrinsicMixFloat, "intrinsics/MixFloat.sksl") SKSL_TEST_ES3(SkSLIntrinsicModf, "intrinsics/Modf.sksl") SKSL_TEST_ES3(SkSLIntrinsicOuterProduct, "intrinsics/OuterProduct.sksl") // Fails on Mac OpenGL + Radeon 5300M (skia:12434) //SKSL_TEST_ES3(SkSLIntrinsicPackUnorm2x16, "intrinsics/PackUnorm2x16.sksl") SKSL_TEST_ES3(SkSLIntrinsicRound, "intrinsics/Round.sksl") SKSL_TEST_ES3(SkSLIntrinsicRoundEven, "intrinsics/RoundEven.sksl") SKSL_TEST(SkSLIntrinsicSignFloat, "intrinsics/SignFloat.sksl") SKSL_TEST(SkSLIntrinsicStep, "intrinsics/Step.sksl") SKSL_TEST_ES3(SkSLIntrinsicTrunc, "intrinsics/Trunc.sksl") SKSL_TEST_ES3(SkSLIntrinsicTranspose, "intrinsics/Transpose.sksl") SKSL_TEST_ES3(SkSLIntrinsicUintBitsToFloat, "intrinsics/UintBitsToFloat.sksl") SKSL_TEST_ES3(SkSLArrayNarrowingConversions, "runtime/ArrayNarrowingConversions.rts") SKSL_TEST_ES3(SkSLLoopFloat, "runtime/LoopFloat.rts") SKSL_TEST_ES3(SkSLLoopInt, "runtime/LoopInt.rts") SKSL_TEST_ES3(SkSLArrayComparison, "shared/ArrayComparison.sksl") SKSL_TEST_ES3(SkSLArrayConstructors, "shared/ArrayConstructors.sksl") SKSL_TEST_ES3(SkSLArrayCast, "shared/ArrayCast.sksl") SKSL_TEST_ES3(SkSLArrayFollowedByScalar, "shared/ArrayFollowedByScalar.sksl") SKSL_TEST(SkSLArrayTypes, "shared/ArrayTypes.sksl") SKSL_TEST(SkSLAssignment, "shared/Assignment.sksl") SKSL_TEST(SkSLCastsRoundTowardZero, "shared/CastsRoundTowardZero.sksl") SKSL_TEST(SkSLCommaMixedTypes, "shared/CommaMixedTypes.sksl") // This test causes the Adreno 330 driver to crash, and does not pass on Quadro P400 in wasm. // The CPU test confirms that we can get it right, even if not all drivers do. SKSL_TEST_CPU(SkSLCommaSideEffects, "shared/CommaSideEffects.sksl") SKSL_TEST(SkSLConstantIf, "shared/ConstantIf.sksl") SKSL_TEST_ES3(SkSLConstArray, "shared/ConstArray.sksl") SKSL_TEST(SkSLConstVariableComparison, "shared/ConstVariableComparison.sksl") SKSL_TEST(SkSLDeadIfStatement, "shared/DeadIfStatement.sksl") SKSL_TEST(SkSLDeadReturn, "shared/DeadReturn.sksl") // TODO(skia:12012): some Radeons crash when compiling this code; disable them //SKSL_TEST_ES3(SkSLDeadReturnES3, "shared/DeadReturnES3.sksl") SKSL_TEST(SkSLDeadStripFunctions, "shared/DeadStripFunctions.sksl") SKSL_TEST(SkSLDependentInitializers, "shared/DependentInitializers.sksl") SKSL_TEST_ES3(SkSLDoWhileControlFlow, "shared/DoWhileControlFlow.sksl") SKSL_TEST(SkSLEmptyBlocksES2, "shared/EmptyBlocksES2.sksl") SKSL_TEST(SkSLForLoopControlFlow, "shared/ForLoopControlFlow.sksl") SKSL_TEST(SkSLFunctionArgTypeMatch, "shared/FunctionArgTypeMatch.sksl") SKSL_TEST(SkSLFunctionReturnTypeMatch, "shared/FunctionReturnTypeMatch.sksl") SKSL_TEST(SkSLFunctions, "shared/Functions.sksl") SKSL_TEST(SkSLFunctionPrototype, "shared/FunctionPrototype.sksl") SKSL_TEST(SkSLGeometricIntrinsics, "shared/GeometricIntrinsics.sksl") SKSL_TEST(SkSLHelloWorld, "shared/HelloWorld.sksl") SKSL_TEST(SkSLHex, "shared/Hex.sksl") SKSL_TEST(SkSLMatrices, "shared/Matrices.sksl") SKSL_TEST_ES3(SkSLMatricesNonsquare, "shared/MatricesNonsquare.sksl") SKSL_TEST(SkSLMatrixEquality, "shared/MatrixEquality.sksl") SKSL_TEST(SkSLMatrixScalarSplat, "shared/MatrixScalarSplat.sksl") SKSL_TEST(SkSLMatrixToVectorCast, "shared/MatrixToVectorCast.sksl") SKSL_TEST(SkSLMultipleAssignments, "shared/MultipleAssignments.sksl") SKSL_TEST(SkSLNegation, "shared/Negation.sksl") SKSL_TEST(SkSLNumberCasts, "shared/NumberCasts.sksl") SKSL_TEST(SkSLOperatorsES2, "shared/OperatorsES2.sksl") SKSL_TEST_ES3(SkSLOperatorsES3, "shared/OperatorsES3.sksl") SKSL_TEST(SkSLOssfuzz36852, "shared/Ossfuzz36852.sksl") // skbug.com/11919: Fails on Adreno + Vulkan SKSL_TEST_CPU(SkSLOutParams, "shared/OutParams.sksl") SKSL_TEST_CPU(SkSLOutParamsNoInline, "shared/OutParamsNoInline.sksl") SKSL_TEST_CPU(SkSLOutParamsTricky, "shared/OutParamsTricky.sksl") SKSL_TEST(SkSLResizeMatrix, "shared/ResizeMatrix.sksl") SKSL_TEST(SkSLReturnsValueOnEveryPathES2, "shared/ReturnsValueOnEveryPathES2.sksl") SKSL_TEST(SkSLScalarConversionConstructorsES2, "shared/ScalarConversionConstructorsES2.sksl") SKSL_TEST_ES3(SkSLScalarConversionConstructorsES3, "shared/ScalarConversionConstructorsES3.sksl") SKSL_TEST(SkSLStackingVectorCasts, "shared/StackingVectorCasts.sksl") SKSL_TEST(SkSLStaticIf, "shared/StaticIf.sksl") SKSL_TEST_ES3(SkSLStaticSwitch, "shared/StaticSwitch.sksl") SKSL_TEST(SkSLStructArrayFollowedByScalar, "shared/StructArrayFollowedByScalar.sksl") SKSL_TEST(SkSLStructsInFunctions, "shared/StructsInFunctions.sksl") SKSL_TEST(SkSLSwizzleBoolConstants, "shared/SwizzleBoolConstants.sksl") SKSL_TEST(SkSLSwizzleByConstantIndex, "shared/SwizzleByConstantIndex.sksl") SKSL_TEST(SkSLSwizzleConstants, "shared/SwizzleConstants.sksl") SKSL_TEST(SkSLSwizzleLTRB, "shared/SwizzleLTRB.sksl") SKSL_TEST(SkSLSwizzleOpt, "shared/SwizzleOpt.sksl") SKSL_TEST(SkSLSwizzleScalar, "shared/SwizzleScalar.sksl") SKSL_TEST(SkSLSwizzleScalarBool, "shared/SwizzleScalarBool.sksl") SKSL_TEST(SkSLSwizzleScalarInt, "shared/SwizzleScalarInt.sksl") SKSL_TEST(SkSLTernaryAsLValueEntirelyFoldable, "shared/TernaryAsLValueEntirelyFoldable.sksl") SKSL_TEST(SkSLTernaryAsLValueFoldableTest, "shared/TernaryAsLValueFoldableTest.sksl") SKSL_TEST(SkSLTernaryExpression, "shared/TernaryExpression.sksl") SKSL_TEST(SkSLUnaryPositiveNegative, "shared/UnaryPositiveNegative.sksl") SKSL_TEST(SkSLUnusedVariables, "shared/UnusedVariables.sksl") SKSL_TEST(SkSLVectorConstructors, "shared/VectorConstructors.sksl") SKSL_TEST(SkSLVectorToMatrixCast, "shared/VectorToMatrixCast.sksl") // skbug.com/11919: Fails on Nexus5/7, and Intel GPUs SKSL_TEST_CPU(SkSLVectorScalarMath, "shared/VectorScalarMath.sksl") SKSL_TEST_ES3(SkSLWhileLoopControlFlow, "shared/WhileLoopControlFlow.sksl") /* TODO(skia:11209): enable these tests when Runtime Effects have support for ES3 SKSL_TEST(SkSLMatrixFoldingES3, "folding/MatrixFoldingES3.sksl") SKSL_TEST(SkSLIntrinsicAbsInt, "intrinsics/AbsInt.sksl") SKSL_TEST(SkSLIntrinsicClampInt, "intrinsics/ClampInt.sksl") SKSL_TEST(SkSLIntrinsicMaxInt, "intrinsics/MaxInt.sksl") SKSL_TEST(SkSLIntrinsicMinInt, "intrinsics/MinInt.sksl") SKSL_TEST(SkSLIntrinsicMixBool, "intrinsics/MixBool.sksl") SKSL_TEST(SkSLIntrinsicSignInt, "intrinsics/SignInt.sksl") SKSL_TEST(SkSLDeadLoopVariable, "shared/DeadLoopVariable.sksl") SKSL_TEST(SkSLEmptyBlocksES3, "shared/EmptyBlocksES3.sksl") SKSL_TEST(SkSLHexUnsigned, "shared/HexUnsigned.sksl") SKSL_TEST(SkSLResizeMatrixNonsquare, "shared/ResizeMatrixNonsquare.sksl") SKSL_TEST(SkSLReturnsValueOnEveryPathES3, "shared/ReturnsValueOnEveryPathES3.sksl") SKSL_TEST(SkSLSwizzleByIndex, "shared/SwizzleByIndex.sksl") */