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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "src/gpu/GrShaderCaps.h"
#include "include/gpu/GrContextOptions.h"
#include "src/utils/SkJSONWriter.h"
////////////////////////////////////////////////////////////////////////////////////////////
GrShaderCaps::GrShaderCaps(const GrContextOptions& options) {
fGLSLGeneration = k330_GrGLSLGeneration;
fShaderDerivativeSupport = false;
fGeometryShaderSupport = false;
fGSInvocationsSupport = false;
fDstReadInShaderSupport = false;
fDualSourceBlendingSupport = false;
fIntegerSupport = false;
fNonsquareMatrixSupport = false;
fFBFetchSupport = false;
fFBFetchNeedsCustomOutput = false;
fUsesPrecisionModifiers = false;
fCanUseAnyFunctionInShader = true;
fCanUseMinAndAbsTogether = true;
fCanUseFractForNegativeValues = true;
fMustForceNegatedAtanParamToFloat = false;
fMustForceNegatedLdexpParamToMultiply = false;
fAtan2ImplementedAsAtanYOverX = false;
fMustDoOpBetweenFloorAndAbs = false;
fRequiresLocalOutputColorForFBFetch = false;
fMustObfuscateUniformColor = false;
fMustGuardDivisionEvenAfterExplicitZeroCheck = false;
fInBlendModesFailRandomlyForAllZeroVec = false;
fCanUseFragCoord = true;
fIncompleteShortIntPrecision = false;
fAddAndTrueToLoopCondition = false;
fUnfoldShortCircuitAsTernary = false;
fEmulateAbsIntFunction = false;
fRewriteDoWhileLoops = false;
fRemovePowWithConstantExponent = false;
fMustWriteToFragColor = false;
fNoDefaultPrecisionForExternalSamplers = false;
fRewriteMatrixVectorMultiply = false;
fRewriteMatrixComparisons = false;
fFlatInterpolationSupport = false;
fPreferFlatInterpolation = false;
fNoPerspectiveInterpolationSupport = false;
fSampleMaskSupport = false;
fExternalTextureSupport = false;
fVertexIDSupport = false;
fInfinitySupport = false;
fBitManipulationSupport = false;
fFloatIs32Bits = true;
fHalfIs32Bits = false;
fHasLowFragmentPrecision = false;
fReducedShaderMode = false;
fColorSpaceMathNeedsFloat = false;
fBuiltinFMASupport = false;
fBuiltinDeterminantSupport = false;
fCanUseDoLoops = true;
fCanUseFastMath = false;
fUseNodePools = true;
fAvoidDfDxForGradientsWhenPossible = false;
fVersionDeclString = nullptr;
fShaderDerivativeExtensionString = nullptr;
fGeometryShaderExtensionString = nullptr;
fGSInvocationsExtensionString = nullptr;
fSecondaryOutputExtensionString = nullptr;
fExternalTextureExtensionString = nullptr;
fSecondExternalTextureExtensionString = nullptr;
fNoPerspectiveInterpolationExtensionString = nullptr;
fSampleVariablesExtensionString = nullptr;
fTessellationExtensionString = nullptr;
fFBFetchColorName = nullptr;
fFBFetchExtensionString = nullptr;
fMaxFragmentSamplers = 0;
fMaxTessellationSegments = 0;
fAdvBlendEqInteraction = kNotSupported_AdvBlendEqInteraction;
}
#ifdef SK_ENABLE_DUMP_GPU
void GrShaderCaps::dumpJSON(SkJSONWriter* writer) const {
writer->beginObject();
writer->appendBool("Shader Derivative Support", fShaderDerivativeSupport);
writer->appendBool("Geometry Shader Support", fGeometryShaderSupport);
writer->appendBool("Geometry Shader Invocations Support", fGSInvocationsSupport);
writer->appendBool("Dst Read In Shader Support", fDstReadInShaderSupport);
writer->appendBool("Dual Source Blending Support", fDualSourceBlendingSupport);
writer->appendBool("Integer Support", fIntegerSupport);
writer->appendBool("Nonsquare Matrix Support", fNonsquareMatrixSupport);
static const char* kAdvBlendEqInteractionStr[] = {
"Not Supported",
"Automatic",
"General Enable",
};
static_assert(0 == kNotSupported_AdvBlendEqInteraction);
static_assert(1 == kAutomatic_AdvBlendEqInteraction);
static_assert(2 == kGeneralEnable_AdvBlendEqInteraction);
static_assert(SK_ARRAY_COUNT(kAdvBlendEqInteractionStr) == kLast_AdvBlendEqInteraction + 1);
writer->appendBool("FB Fetch Support", fFBFetchSupport);
writer->appendBool("Uses precision modifiers", fUsesPrecisionModifiers);
writer->appendBool("Can use any() function", fCanUseAnyFunctionInShader);
writer->appendBool("Can use min() and abs() together", fCanUseMinAndAbsTogether);
writer->appendBool("Can use fract() for negative values", fCanUseFractForNegativeValues);
writer->appendBool("Must force negated atan param to float", fMustForceNegatedAtanParamToFloat);
writer->appendBool("Must force negated ldexp param to multiply",
fMustForceNegatedLdexpParamToMultiply);
writer->appendBool("Must do op between floor and abs", fMustDoOpBetweenFloorAndAbs);
writer->appendBool("Must use local out color for FBFetch", fRequiresLocalOutputColorForFBFetch);
writer->appendBool("Must obfuscate uniform color", fMustObfuscateUniformColor);
writer->appendBool("Must guard division even after explicit zero check",
fMustGuardDivisionEvenAfterExplicitZeroCheck);
writer->appendBool(
"src-in and dst-in blend modes may return (0,0,0,1) when dst/src is all zeros",
fInBlendModesFailRandomlyForAllZeroVec);
writer->appendBool("Can use gl_FragCoord", fCanUseFragCoord);
writer->appendBool("Incomplete short int precision", fIncompleteShortIntPrecision);
writer->appendBool("Add and true to loops workaround", fAddAndTrueToLoopCondition);
writer->appendBool("Unfold short circuit as ternary", fUnfoldShortCircuitAsTernary);
writer->appendBool("Emulate abs(int) function", fEmulateAbsIntFunction);
writer->appendBool("Rewrite do while loops", fRewriteDoWhileLoops);
writer->appendBool("Rewrite pow with constant exponent", fRemovePowWithConstantExponent);
writer->appendBool("Must write to sk_FragColor [workaround]", fMustWriteToFragColor);
writer->appendBool("Don't add default precision statement for samplerExternalOES",
fNoDefaultPrecisionForExternalSamplers);
writer->appendBool("Rewrite matrix-vector multiply", fRewriteMatrixVectorMultiply);
writer->appendBool("Rewrite matrix equality comparisons", fRewriteMatrixComparisons);
writer->appendBool("Flat interpolation support", fFlatInterpolationSupport);
writer->appendBool("Prefer flat interpolation", fPreferFlatInterpolation);
writer->appendBool("No perspective interpolation support", fNoPerspectiveInterpolationSupport);
writer->appendBool("Sample mask support", fSampleMaskSupport);
writer->appendBool("External texture support", fExternalTextureSupport);
writer->appendBool("sk_VertexID support", fVertexIDSupport);
writer->appendBool("Infinity support", fInfinitySupport);
writer->appendBool("Bit manipulation support", fBitManipulationSupport);
writer->appendBool("float == fp32", fFloatIs32Bits);
writer->appendBool("half == fp32", fHalfIs32Bits);
writer->appendBool("Has poor fragment precision", fHasLowFragmentPrecision);
writer->appendBool("Color space math needs float", fColorSpaceMathNeedsFloat);
writer->appendBool("Builtin fma() support", fBuiltinFMASupport);
writer->appendBool("Builtin determinant() support", fBuiltinDeterminantSupport);
writer->appendBool("Can use do-while loops", fCanUseDoLoops);
writer->appendBool("Use node pools", fUseNodePools);
writer->appendS32("Max FS Samplers", fMaxFragmentSamplers);
writer->appendS32("Max Tessellation Segments", fMaxTessellationSegments);
writer->appendString("Advanced blend equation interaction",
kAdvBlendEqInteractionStr[fAdvBlendEqInteraction]);
writer->endObject();
}
#else
void GrShaderCaps::dumpJSON(SkJSONWriter* writer) const { }
#endif
void GrShaderCaps::applyOptionsOverrides(const GrContextOptions& options) {
if (options.fDisableDriverCorrectnessWorkarounds) {
SkASSERT(fCanUseAnyFunctionInShader);
SkASSERT(fCanUseMinAndAbsTogether);
SkASSERT(fCanUseFractForNegativeValues);
SkASSERT(!fMustForceNegatedAtanParamToFloat);
SkASSERT(!fMustForceNegatedLdexpParamToMultiply);
SkASSERT(!fAtan2ImplementedAsAtanYOverX);
SkASSERT(!fMustDoOpBetweenFloorAndAbs);
SkASSERT(!fRequiresLocalOutputColorForFBFetch);
SkASSERT(!fMustObfuscateUniformColor);
SkASSERT(!fMustGuardDivisionEvenAfterExplicitZeroCheck);
SkASSERT(!fInBlendModesFailRandomlyForAllZeroVec);
SkASSERT(fCanUseFragCoord);
SkASSERT(!fIncompleteShortIntPrecision);
SkASSERT(!fAddAndTrueToLoopCondition);
SkASSERT(!fUnfoldShortCircuitAsTernary);
SkASSERT(!fEmulateAbsIntFunction);
SkASSERT(!fRewriteDoWhileLoops);
SkASSERT(!fRemovePowWithConstantExponent);
SkASSERT(!fMustWriteToFragColor);
SkASSERT(!fNoDefaultPrecisionForExternalSamplers);
SkASSERT(!fRewriteMatrixVectorMultiply);
SkASSERT(!fRewriteMatrixComparisons);
}
if (!options.fEnableExperimentalHardwareTessellation) {
fMaxTessellationSegments = 0;
}
if (options.fReducedShaderVariations) {
fReducedShaderMode = true;
}
#if GR_TEST_UTILS
if (options.fSuppressDualSourceBlending) {
fDualSourceBlendingSupport = false;
}
if (options.fSuppressFramebufferFetch) {
fFBFetchSupport = false;
}
if (options.fSuppressGeometryShaders) {
fGeometryShaderSupport = false;
}
if (options.fMaxTessellationSegmentsOverride > 0) {
fMaxTessellationSegments = std::min(options.fMaxTessellationSegmentsOverride,
fMaxTessellationSegments);
}
#endif
}