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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 "GrShaderCaps.h"
#include "GrContextOptions.h"
#include "SkJSONWriter.h"
////////////////////////////////////////////////////////////////////////////////////////////
GrShaderCaps::GrShaderCaps(const GrContextOptions& options) {
fGLSLGeneration = k330_GrGLSLGeneration;
fShaderDerivativeSupport = false;
fGeometryShaderSupport = false;
fGSInvocationsSupport = false;
fPathRenderingSupport = false;
fDstReadInShaderSupport = false;
fDualSourceBlendingSupport = false;
fIntegerSupport = false;
fTexelBufferSupport = false;
fImageLoadStoreSupport = false;
fDropsTileOnZeroDivide = false;
fFBFetchSupport = false;
fFBFetchNeedsCustomOutput = false;
fUsesPrecisionModifiers = false;
fCanUseAnyFunctionInShader = true;
fCanUseMinAndAbsTogether = true;
fCanUseFractForNegativeValues = true;
fMustForceNegatedAtanParamToFloat = false;
fAtan2ImplementedAsAtanYOverX = false;
fMustDoOpBetweenFloorAndAbs = false;
fRequiresLocalOutputColorForFBFetch = false;
fMustObfuscateUniformColor = false;
fMustGuardDivisionEvenAfterExplicitZeroCheck = false;
fCanUseFragCoord = true;
fInterpolantsAreInaccurate = false;
fIncompleteShortIntPrecision = false;
fFlatInterpolationSupport = false;
fPreferFlatInterpolation = false;
fNoPerspectiveInterpolationSupport = false;
fExternalTextureSupport = false;
fTexelFetchSupport = false;
fVertexIDSupport = false;
fFloatIs32Bits = true;
fHalfIs32Bits = false;
fVersionDeclString = nullptr;
fShaderDerivativeExtensionString = nullptr;
fGeometryShaderExtensionString = nullptr;
fGSInvocationsExtensionString = nullptr;
fFragCoordConventionsExtensionString = nullptr;
fSecondaryOutputExtensionString = nullptr;
fExternalTextureExtensionString = nullptr;
fTexelBufferExtensionString = nullptr;
fNoPerspectiveInterpolationExtensionString = nullptr;
fFBFetchColorName = nullptr;
fFBFetchExtensionString = nullptr;
fImageLoadStoreExtensionString = nullptr;
fMaxVertexSamplers = 0;
fMaxGeometrySamplers = 0;
fMaxFragmentSamplers = 0;
fMaxCombinedSamplers = 0;
fAdvBlendEqInteraction = kNotSupported_AdvBlendEqInteraction;
// TODO: Default this to 0 and only enable image multitexturing when a "safe" threshold is
// known for a GPU class.
fDisableImageMultitexturingDstRectAreaThreshold = std::numeric_limits<size_t>::max();
}
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("Path Rendering Support", fPathRenderingSupport);
writer->appendBool("Dst Read In Shader Support", fDstReadInShaderSupport);
writer->appendBool("Dual Source Blending Support", fDualSourceBlendingSupport);
writer->appendBool("Integer Support", fIntegerSupport);
writer->appendBool("Texel Buffer Support", fTexelBufferSupport);
writer->appendBool("Image Load Store Support", fImageLoadStoreSupport);
static const char* kAdvBlendEqInteractionStr[] = {
"Not Supported",
"Automatic",
"General Enable",
"Specific Enables",
};
GR_STATIC_ASSERT(0 == kNotSupported_AdvBlendEqInteraction);
GR_STATIC_ASSERT(1 == kAutomatic_AdvBlendEqInteraction);
GR_STATIC_ASSERT(2 == kGeneralEnable_AdvBlendEqInteraction);
GR_STATIC_ASSERT(3 == kSpecificEnables_AdvBlendEqInteraction);
GR_STATIC_ASSERT(SK_ARRAY_COUNT(kAdvBlendEqInteractionStr) == kLast_AdvBlendEqInteraction + 1);
writer->appendBool("FB Fetch Support", fFBFetchSupport);
writer->appendBool("Drops tile on zero divide", fDropsTileOnZeroDivide);
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 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("Can use gl_FragCoord", fCanUseFragCoord);
writer->appendBool("Interpolants are inaccurate", fInterpolantsAreInaccurate);
writer->appendBool("Incomplete short int precision", fIncompleteShortIntPrecision);
writer->appendBool("Flat interpolation support", fFlatInterpolationSupport);
writer->appendBool("Prefer flat interpolation", fPreferFlatInterpolation);
writer->appendBool("No perspective interpolation support", fNoPerspectiveInterpolationSupport);
writer->appendBool("External texture support", fExternalTextureSupport);
writer->appendBool("texelFetch support", fTexelFetchSupport);
writer->appendBool("sk_VertexID support", fVertexIDSupport);
writer->appendBool("float == fp32", fFloatIs32Bits);
writer->appendBool("half == fp32", fHalfIs32Bits);
writer->appendS32("Max VS Samplers", fMaxVertexSamplers);
writer->appendS32("Max GS Samplers", fMaxGeometrySamplers);
writer->appendS32("Max FS Samplers", fMaxFragmentSamplers);
writer->appendS32("Max Combined Samplers", fMaxFragmentSamplers);
writer->appendString("Advanced blend equation interaction",
kAdvBlendEqInteractionStr[fAdvBlendEqInteraction]);
writer->appendU64("Disable image multitexturing dst area threshold",
fDisableImageMultitexturingDstRectAreaThreshold);
writer->endObject();
}
void GrShaderCaps::applyOptionsOverrides(const GrContextOptions& options) {
if (options.fDisableDriverCorrectnessWorkarounds) {
SkASSERT(fCanUseAnyFunctionInShader);
SkASSERT(fCanUseMinAndAbsTogether);
SkASSERT(fCanUseFractForNegativeValues);
SkASSERT(!fMustForceNegatedAtanParamToFloat);
SkASSERT(!fAtan2ImplementedAsAtanYOverX);
SkASSERT(!fMustDoOpBetweenFloorAndAbs);
SkASSERT(!fRequiresLocalOutputColorForFBFetch);
SkASSERT(!fMustObfuscateUniformColor);
SkASSERT(!fMustGuardDivisionEvenAfterExplicitZeroCheck);
SkASSERT(fCanUseFragCoord);
SkASSERT(!fInterpolantsAreInaccurate);
SkASSERT(!fIncompleteShortIntPrecision);
}
#if GR_TEST_UTILS
fDualSourceBlendingSupport = fDualSourceBlendingSupport && !options.fSuppressDualSourceBlending;
if (options.fDisableImageMultitexturing) {
fDisableImageMultitexturingDstRectAreaThreshold = 0;
}
#endif
}
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