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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 "GrGLSLCaps.h"
#include "GrContextOptions.h"
////////////////////////////////////////////////////////////////////////////////////////////
GrGLSLCaps::GrGLSLCaps(const GrContextOptions& options) {
fGLSLGeneration = k330_GrGLSLGeneration;
fDropsTileOnZeroDivide = false;
fFBFetchSupport = false;
fFBFetchNeedsCustomOutput = false;
fBindlessTextureSupport = false;
fUsesPrecisionModifiers = false;
fCanUseAnyFunctionInShader = true;
fCanUseMinAndAbsTogether = true;
fMustForceNegatedAtanParamToFloat = false;
fRequiresLocalOutputColorForFBFetch = false;
fFlatInterpolationSupport = false;
fNoPerspectiveInterpolationSupport = false;
fMultisampleInterpolationSupport = false;
fSampleVariablesSupport = false;
fSampleMaskOverrideCoverageSupport = false;
fExternalTextureSupport = false;
fTexelFetchSupport = false;
fVersionDeclString = nullptr;
fShaderDerivativeExtensionString = nullptr;
fFragCoordConventionsExtensionString = nullptr;
fSecondaryOutputExtensionString = nullptr;
fExternalTextureExtensionString = nullptr;
fTexelBufferExtensionString = nullptr;
fNoPerspectiveInterpolationExtensionString = nullptr;
fMultisampleInterpolationExtensionString = nullptr;
fSampleVariablesExtensionString = nullptr;
fFBFetchColorName = nullptr;
fFBFetchExtensionString = nullptr;
fMaxVertexSamplers = 0;
fMaxGeometrySamplers = 0;
fMaxFragmentSamplers = 0;
fMaxCombinedSamplers = 0;
fAdvBlendEqInteraction = kNotSupported_AdvBlendEqInteraction;
}
SkString GrGLSLCaps::dump() const {
SkString r = INHERITED::dump();
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);
r.appendf("--- GLSL-Specific ---\n");
r.appendf("FB Fetch Support: %s\n", (fFBFetchSupport ? "YES" : "NO"));
r.appendf("Drops tile on zero divide: %s\n", (fDropsTileOnZeroDivide ? "YES" : "NO"));
r.appendf("Bindless texture support: %s\n", (fBindlessTextureSupport ? "YES" : "NO"));
r.appendf("Uses precision modifiers: %s\n", (fUsesPrecisionModifiers ? "YES" : "NO"));
r.appendf("Can use any() function: %s\n", (fCanUseAnyFunctionInShader ? "YES" : "NO"));
r.appendf("Can use min() and abs() together: %s\n", (fCanUseMinAndAbsTogether ? "YES" : "NO"));
r.appendf("Must force negated atan param to float: %s\n", (fMustForceNegatedAtanParamToFloat ?
"YES" : "NO"));
r.appendf("Must use local out color for FBFetch: %s\n", (fRequiresLocalOutputColorForFBFetch ?
"YES" : "NO"));
r.appendf("Flat interpolation support: %s\n", (fFlatInterpolationSupport ? "YES" : "NO"));
r.appendf("No perspective interpolation support: %s\n", (fNoPerspectiveInterpolationSupport ?
"YES" : "NO"));
r.appendf("Multisample interpolation support: %s\n", (fMultisampleInterpolationSupport ?
"YES" : "NO"));
r.appendf("Sample variables support: %s\n", (fSampleVariablesSupport ? "YES" : "NO"));
r.appendf("Sample mask override coverage support: %s\n", (fSampleMaskOverrideCoverageSupport ?
"YES" : "NO"));
r.appendf("External texture support: %s\n", (fExternalTextureSupport ? "YES" : "NO"));
r.appendf("texelFetch support: %s\n", (fTexelFetchSupport ? "YES" : "NO"));
r.appendf("Max VS Samplers: %d\n", fMaxVertexSamplers);
r.appendf("Max GS Samplers: %d\n", fMaxGeometrySamplers);
r.appendf("Max FS Samplers: %d\n", fMaxFragmentSamplers);
r.appendf("Max Combined Samplers: %d\n", fMaxFragmentSamplers);
r.appendf("Advanced blend equation interaction: %s\n",
kAdvBlendEqInteractionStr[fAdvBlendEqInteraction]);
return r;
}
void GrGLSLCaps::initSamplerPrecisionTable() {
// Determine the largest precision qualifiers that are effectively the same as lowp/mediump.
// e.g. if lowp == mediump, then use mediump instead of lowp.
GrSLPrecision effectiveMediumP[kGrShaderTypeCount];
GrSLPrecision effectiveLowP[kGrShaderTypeCount];
for (int s = 0; s < kGrShaderTypeCount; ++s) {
const PrecisionInfo* info = fFloatPrecisions[s];
effectiveMediumP[s] = info[kHigh_GrSLPrecision] == info[kMedium_GrSLPrecision] ?
kHigh_GrSLPrecision : kMedium_GrSLPrecision;
effectiveLowP[s] = info[kMedium_GrSLPrecision] == info[kLow_GrSLPrecision] ?
effectiveMediumP[s] : kLow_GrSLPrecision;
}
// Determine which precision qualifiers should be used with samplers.
for (int visibility = 0; visibility < (1 << kGrShaderTypeCount); ++visibility) {
GrSLPrecision mediump = kHigh_GrSLPrecision;
GrSLPrecision lowp = kHigh_GrSLPrecision;
for (int s = 0; s < kGrShaderTypeCount; ++s) {
if (visibility & (1 << s)) {
mediump = SkTMin(mediump, effectiveMediumP[s]);
lowp = SkTMin(lowp, effectiveLowP[s]);
}
GR_STATIC_ASSERT(0 == kLow_GrSLPrecision);
GR_STATIC_ASSERT(1 == kMedium_GrSLPrecision);
GR_STATIC_ASSERT(2 == kHigh_GrSLPrecision);
GR_STATIC_ASSERT((1 << kVertex_GrShaderType) == kVertex_GrShaderFlag);
GR_STATIC_ASSERT((1 << kGeometry_GrShaderType) == kGeometry_GrShaderFlag);
GR_STATIC_ASSERT((1 << kFragment_GrShaderType) == kFragment_GrShaderFlag);
GR_STATIC_ASSERT(3 == kGrShaderTypeCount);
}
uint8_t* table = fSamplerPrecisions[visibility];
table[kUnknown_GrPixelConfig] = kDefault_GrSLPrecision;
table[kAlpha_8_GrPixelConfig] = lowp;
table[kIndex_8_GrPixelConfig] = lowp;
table[kRGB_565_GrPixelConfig] = lowp;
table[kRGBA_4444_GrPixelConfig] = lowp;
table[kRGBA_8888_GrPixelConfig] = lowp;
table[kBGRA_8888_GrPixelConfig] = lowp;
table[kSRGBA_8888_GrPixelConfig] = lowp;
table[kSBGRA_8888_GrPixelConfig] = lowp;
table[kRGBA_8888_sint_GrPixelConfig] = lowp;
table[kETC1_GrPixelConfig] = lowp;
table[kLATC_GrPixelConfig] = lowp;
table[kR11_EAC_GrPixelConfig] = lowp;
table[kASTC_12x12_GrPixelConfig] = lowp;
table[kRGBA_float_GrPixelConfig] = kHigh_GrSLPrecision;
table[kAlpha_half_GrPixelConfig] = mediump;
table[kRGBA_half_GrPixelConfig] = mediump;
GR_STATIC_ASSERT(17 == kGrPixelConfigCnt);
}
}
void GrGLSLCaps::onApplyOptionsOverrides(const GrContextOptions& options) {
}
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