1 /* 2 * Copyright 2012 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 8 9 #include "GrShaderCaps.h" 10 11 #include "GrContextOptions.h" 12 #include "SkJSONWriter.h" 13 14 //////////////////////////////////////////////////////////////////////////////////////////// 15 16 GrShaderCaps::GrShaderCaps(const GrContextOptions& options) { 17 fGLSLGeneration = k330_GrGLSLGeneration; 18 fShaderDerivativeSupport = false; 19 fGeometryShaderSupport = false; 20 fGSInvocationsSupport = false; 21 fPathRenderingSupport = false; 22 fDstReadInShaderSupport = false; 23 fDualSourceBlendingSupport = false; 24 fIntegerSupport = false; 25 fImageLoadStoreSupport = false; 26 fDropsTileOnZeroDivide = false; 27 fFBFetchSupport = false; 28 fFBFetchNeedsCustomOutput = false; 29 fUsesPrecisionModifiers = false; 30 fCanUseAnyFunctionInShader = true; 31 fCanUseMinAndAbsTogether = true; 32 fCanUseFractForNegativeValues = true; 33 fMustForceNegatedAtanParamToFloat = false; 34 fAtan2ImplementedAsAtanYOverX = false; 35 fMustDoOpBetweenFloorAndAbs = false; 36 fRequiresLocalOutputColorForFBFetch = false; 37 fMustObfuscateUniformColor = false; 38 fMustGuardDivisionEvenAfterExplicitZeroCheck = false; 39 fCanUseFragCoord = true; 40 fIncompleteShortIntPrecision = false; 41 fAddAndTrueToLoopCondition = false; 42 fUnfoldShortCircuitAsTernary = false; 43 fEmulateAbsIntFunction = false; 44 fRewriteDoWhileLoops = false; 45 fRemovePowWithConstantExponent = false; 46 fFlatInterpolationSupport = false; 47 fPreferFlatInterpolation = false; 48 fNoPerspectiveInterpolationSupport = false; 49 fSampleVariablesSupport = false; 50 fExternalTextureSupport = false; 51 fVertexIDSupport = false; 52 fFPManipulationSupport = false; 53 fFloatIs32Bits = true; 54 fHalfIs32Bits = false; 55 fHasLowFragmentPrecision = false; 56 fUnsignedSupport = false; 57 fBuiltinFMASupport = false; 58 59 fVersionDeclString = nullptr; 60 fShaderDerivativeExtensionString = nullptr; 61 fGeometryShaderExtensionString = nullptr; 62 fGSInvocationsExtensionString = nullptr; 63 fFragCoordConventionsExtensionString = nullptr; 64 fSecondaryOutputExtensionString = nullptr; 65 fExternalTextureExtensionString = nullptr; 66 fSecondExternalTextureExtensionString = nullptr; 67 fNoPerspectiveInterpolationExtensionString = nullptr; 68 fSampleVariablesExtensionString = nullptr; 69 fFBFetchColorName = nullptr; 70 fFBFetchExtensionString = nullptr; 71 fImageLoadStoreExtensionString = nullptr; 72 fMaxFragmentSamplers = 0; 73 fAdvBlendEqInteraction = kNotSupported_AdvBlendEqInteraction; 74 } 75 76 #ifdef SK_ENABLE_DUMP_GPU 77 void GrShaderCaps::dumpJSON(SkJSONWriter* writer) const { 78 writer->beginObject(); 79 80 writer->appendBool("Shader Derivative Support", fShaderDerivativeSupport); 81 writer->appendBool("Geometry Shader Support", fGeometryShaderSupport); 82 writer->appendBool("Geometry Shader Invocations Support", fGSInvocationsSupport); 83 writer->appendBool("Path Rendering Support", fPathRenderingSupport); 84 writer->appendBool("Dst Read In Shader Support", fDstReadInShaderSupport); 85 writer->appendBool("Dual Source Blending Support", fDualSourceBlendingSupport); 86 writer->appendBool("Integer Support", fIntegerSupport); 87 writer->appendBool("Image Load Store Support", fImageLoadStoreSupport); 88 89 static const char* kAdvBlendEqInteractionStr[] = { 90 "Not Supported", 91 "Automatic", 92 "General Enable", 93 "Specific Enables", 94 }; 95 GR_STATIC_ASSERT(0 == kNotSupported_AdvBlendEqInteraction); 96 GR_STATIC_ASSERT(1 == kAutomatic_AdvBlendEqInteraction); 97 GR_STATIC_ASSERT(2 == kGeneralEnable_AdvBlendEqInteraction); 98 GR_STATIC_ASSERT(3 == kSpecificEnables_AdvBlendEqInteraction); 99 GR_STATIC_ASSERT(SK_ARRAY_COUNT(kAdvBlendEqInteractionStr) == kLast_AdvBlendEqInteraction + 1); 100 101 writer->appendBool("FB Fetch Support", fFBFetchSupport); 102 writer->appendBool("Drops tile on zero divide", fDropsTileOnZeroDivide); 103 writer->appendBool("Uses precision modifiers", fUsesPrecisionModifiers); 104 writer->appendBool("Can use any() function", fCanUseAnyFunctionInShader); 105 writer->appendBool("Can use min() and abs() together", fCanUseMinAndAbsTogether); 106 writer->appendBool("Can use fract() for negative values", fCanUseFractForNegativeValues); 107 writer->appendBool("Must force negated atan param to float", fMustForceNegatedAtanParamToFloat); 108 writer->appendBool("Must do op between floor and abs", fMustDoOpBetweenFloorAndAbs); 109 writer->appendBool("Must use local out color for FBFetch", fRequiresLocalOutputColorForFBFetch); 110 writer->appendBool("Must obfuscate uniform color", fMustObfuscateUniformColor); 111 writer->appendBool("Must guard division even after explicit zero check", 112 fMustGuardDivisionEvenAfterExplicitZeroCheck); 113 writer->appendBool("Can use gl_FragCoord", fCanUseFragCoord); 114 writer->appendBool("Incomplete short int precision", fIncompleteShortIntPrecision); 115 writer->appendBool("Add and true to loops workaround", fAddAndTrueToLoopCondition); 116 writer->appendBool("Unfold short circuit as ternary", fUnfoldShortCircuitAsTernary); 117 writer->appendBool("Emulate abs(int) function", fEmulateAbsIntFunction); 118 writer->appendBool("Rewrite do while loops", fRewriteDoWhileLoops); 119 writer->appendBool("Rewrite pow with constant exponent", fRemovePowWithConstantExponent); 120 writer->appendBool("Flat interpolation support", fFlatInterpolationSupport); 121 writer->appendBool("Prefer flat interpolation", fPreferFlatInterpolation); 122 writer->appendBool("No perspective interpolation support", fNoPerspectiveInterpolationSupport); 123 writer->appendBool("Sample variables support", fSampleVariablesSupport); 124 writer->appendBool("External texture support", fExternalTextureSupport); 125 writer->appendBool("sk_VertexID support", fVertexIDSupport); 126 writer->appendBool("Floating point manipulation support", fFPManipulationSupport); 127 writer->appendBool("float == fp32", fFloatIs32Bits); 128 writer->appendBool("half == fp32", fHalfIs32Bits); 129 writer->appendBool("Has poor fragment precision", fHasLowFragmentPrecision); 130 writer->appendBool("Builtin fma() support", fBuiltinFMASupport); 131 132 writer->appendS32("Max FS Samplers", fMaxFragmentSamplers); 133 writer->appendString("Advanced blend equation interaction", 134 kAdvBlendEqInteractionStr[fAdvBlendEqInteraction]); 135 136 writer->endObject(); 137 } 138 #else 139 void GrShaderCaps::dumpJSON(SkJSONWriter* writer) const { } 140 #endif 141 142 void GrShaderCaps::applyOptionsOverrides(const GrContextOptions& options) { 143 if (options.fDisableDriverCorrectnessWorkarounds) { 144 SkASSERT(fCanUseAnyFunctionInShader); 145 SkASSERT(fCanUseMinAndAbsTogether); 146 SkASSERT(fCanUseFractForNegativeValues); 147 SkASSERT(!fMustForceNegatedAtanParamToFloat); 148 SkASSERT(!fAtan2ImplementedAsAtanYOverX); 149 SkASSERT(!fMustDoOpBetweenFloorAndAbs); 150 SkASSERT(!fRequiresLocalOutputColorForFBFetch); 151 SkASSERT(!fMustObfuscateUniformColor); 152 SkASSERT(!fMustGuardDivisionEvenAfterExplicitZeroCheck); 153 SkASSERT(fCanUseFragCoord); 154 SkASSERT(!fIncompleteShortIntPrecision); 155 SkASSERT(!fAddAndTrueToLoopCondition); 156 SkASSERT(!fUnfoldShortCircuitAsTernary); 157 SkASSERT(!fEmulateAbsIntFunction); 158 SkASSERT(!fRewriteDoWhileLoops); 159 SkASSERT(!fRemovePowWithConstantExponent); 160 } 161 #if GR_TEST_UTILS 162 fDualSourceBlendingSupport = fDualSourceBlendingSupport && !options.fSuppressDualSourceBlending; 163 #endif 164 } 165
