void GrGpuGLShaders::buildProgram(GrPrimitiveType type) {
// Must initialize all fields or cache will have false negatives!
fCurrentProgram.fProgramDesc.fVertexLayout = fGeometrySrc.fVertexLayout;
fCurrentProgram.fProgramDesc.fOptFlags = 0;
if (kPoints_PrimitiveType != type) {
fCurrentProgram.fProgramDesc.fOptFlags |= GrGLProgram::ProgramDesc::kNotPoints_OptFlagBit;
}
#if GR_AGGRESSIVE_SHADER_OPTS
if (!(fCurrentProgram.fProgramDesc.fVertexLayout & kColor_VertexLayoutBit) &&
(0xffffffff == fCurrDrawState.fColor)) {
fCurrentProgram.fProgramDesc.fOptFlags |= GrGLProgram::ProgramDesc::kVertexColorAllOnes_OptFlagBit;
}
#endif
for (int s = 0; s < kNumStages; ++s) {
GrGLProgram::ProgramDesc::StageDesc& stage = fCurrentProgram.fProgramDesc.fStages[s];
stage.fEnabled = VertexUsesStage(s, fGeometrySrc.fVertexLayout);
if (stage.fEnabled) {
GrGLTexture* texture = (GrGLTexture*) fCurrDrawState.fTextures[s];
GrAssert(NULL != texture);
// we matrix to invert when orientation is TopDown, so make sure
// we aren't in that case before flagging as identity.
if (TextureMatrixIsIdentity(texture, fCurrDrawState.fSamplerStates[s])) {
stage.fOptFlags = GrGLProgram::ProgramDesc::StageDesc::kIdentityMatrix_OptFlagBit;
} else if (!getSamplerMatrix(s).hasPerspective()) {
stage.fOptFlags = GrGLProgram::ProgramDesc::StageDesc::kNoPerspective_OptFlagBit;
} else {
stage.fOptFlags = 0;
}
switch (fCurrDrawState.fSamplerStates[s].getSampleMode()) {
case GrSamplerState::kNormal_SampleMode:
stage.fCoordMapping = GrGLProgram::ProgramDesc::StageDesc::kIdentity_CoordMapping;
break;
case GrSamplerState::kRadial_SampleMode:
stage.fCoordMapping = GrGLProgram::ProgramDesc::StageDesc::kRadialGradient_CoordMapping;
break;
case GrSamplerState::kRadial2_SampleMode:
stage.fCoordMapping = GrGLProgram::ProgramDesc::StageDesc::kRadial2Gradient_CoordMapping;
break;
case GrSamplerState::kSweep_SampleMode:
stage.fCoordMapping = GrGLProgram::ProgramDesc::StageDesc::kSweepGradient_CoordMapping;
break;
default:
GrAssert(!"Unexpected sample mode!");
break;
}
if (GrPixelConfigIsAlphaOnly(texture->config())) {
stage.fModulation = GrGLProgram::ProgramDesc::StageDesc::kAlpha_Modulation;
} else {
stage.fModulation = GrGLProgram::ProgramDesc::StageDesc::kColor_Modulation;
}
if (fCurrDrawState.fEffects[s]) {
fCurrentProgram.fStageEffects[s] = GrGLEffect::Create(fCurrDrawState.fEffects[s]);
} else {
delete fCurrentProgram.fStageEffects[s];
fCurrentProgram.fStageEffects[s] = NULL;
}
} else {
stage.fOptFlags = 0;
stage.fCoordMapping = (GrGLProgram::ProgramDesc::StageDesc::CoordMapping)0;
stage.fModulation = (GrGLProgram::ProgramDesc::StageDesc::Modulation)0;
fCurrentProgram.fStageEffects[s] = NULL;
}
}
}
void GrGpuGLShaders::buildProgram(GrPrimitiveType type,
BlendOptFlags blendOpts,
GrBlendCoeff dstCoeff,
GrCustomStage** customStages) {
ProgramDesc& desc = fCurrentProgram.fProgramDesc;
const GrDrawState& drawState = this->getDrawState();
// This should already have been caught
GrAssert(!(kSkipDraw_BlendOptFlag & blendOpts));
bool skipCoverage = SkToBool(blendOpts & kEmitTransBlack_BlendOptFlag);
bool skipColor = SkToBool(blendOpts & (kEmitTransBlack_BlendOptFlag |
kEmitCoverage_BlendOptFlag));
// The descriptor is used as a cache key. Thus when a field of the
// descriptor will not affect program generation (because of the vertex
// layout in use or other descriptor field settings) it should be set
// to a canonical value to avoid duplicate programs with different keys.
// Must initialize all fields or cache will have false negatives!
desc.fVertexLayout = this->getVertexLayout();
desc.fEmitsPointSize = kPoints_PrimitiveType == type;
bool requiresAttributeColors =
!skipColor && SkToBool(desc.fVertexLayout & kColor_VertexLayoutBit);
bool requiresAttributeCoverage =
!skipCoverage && SkToBool(desc.fVertexLayout &
kCoverage_VertexLayoutBit);
// fColorInput/fCoverageInput records how colors are specified for the.
// program. So we strip the bits from the layout to avoid false negatives
// when searching for an existing program in the cache.
desc.fVertexLayout &= ~(kColor_VertexLayoutBit | kCoverage_VertexLayoutBit);
desc.fColorFilterXfermode = skipColor ?
SkXfermode::kDst_Mode :
drawState.getColorFilterMode();
desc.fColorMatrixEnabled = drawState.isStateFlagEnabled(GrDrawState::kColorMatrix_StateBit);
// no reason to do edge aa or look at per-vertex coverage if coverage is
// ignored
if (skipCoverage) {
desc.fVertexLayout &= ~(kEdge_VertexLayoutBit |
kCoverage_VertexLayoutBit);
}
bool colorIsTransBlack = SkToBool(blendOpts & kEmitTransBlack_BlendOptFlag);
bool colorIsSolidWhite = (blendOpts & kEmitCoverage_BlendOptFlag) ||
(!requiresAttributeColors &&
0xffffffff == drawState.getColor());
if (GR_AGGRESSIVE_SHADER_OPTS && colorIsTransBlack) {
desc.fColorInput = ProgramDesc::kTransBlack_ColorInput;
} else if (GR_AGGRESSIVE_SHADER_OPTS && colorIsSolidWhite) {
desc.fColorInput = ProgramDesc::kSolidWhite_ColorInput;
} else if (GR_GL_NO_CONSTANT_ATTRIBUTES && !requiresAttributeColors) {
desc.fColorInput = ProgramDesc::kUniform_ColorInput;
} else {
desc.fColorInput = ProgramDesc::kAttribute_ColorInput;
}
bool covIsSolidWhite = !requiresAttributeCoverage &&
0xffffffff == drawState.getCoverage();
if (skipCoverage) {
desc.fCoverageInput = ProgramDesc::kTransBlack_ColorInput;
} else if (covIsSolidWhite) {
desc.fCoverageInput = ProgramDesc::kSolidWhite_ColorInput;
} else if (GR_GL_NO_CONSTANT_ATTRIBUTES && !requiresAttributeCoverage) {
desc.fCoverageInput = ProgramDesc::kUniform_ColorInput;
} else {
desc.fCoverageInput = ProgramDesc::kAttribute_ColorInput;
}
int lastEnabledStage = -1;
if (!skipCoverage && (desc.fVertexLayout &
GrDrawTarget::kEdge_VertexLayoutBit)) {
desc.fVertexEdgeType = drawState.getVertexEdgeType();
} else {
// use canonical value when not set to avoid cache misses
desc.fVertexEdgeType = GrDrawState::kHairLine_EdgeType;
}
for (int s = 0; s < GrDrawState::kNumStages; ++s) {
StageDesc& stage = desc.fStages[s];
stage.fOptFlags = 0;
stage.setEnabled(this->isStageEnabled(s));
bool skip = s < drawState.getFirstCoverageStage() ? skipColor :
skipCoverage;
if (!skip && stage.isEnabled()) {
lastEnabledStage = s;
const GrGLTexture* texture =
static_cast<const GrGLTexture*>(drawState.getTexture(s));
GrAssert(NULL != texture);
const GrSamplerState& sampler = drawState.getSampler(s);
// we matrix to invert when orientation is TopDown, so make sure
// we aren't in that case before flagging as identity.
if (TextureMatrixIsIdentity(texture, sampler)) {
stage.fOptFlags |= StageDesc::kIdentityMatrix_OptFlagBit;
} else if (!sampler.getMatrix().hasPerspective()) {
stage.fOptFlags |= StageDesc::kNoPerspective_OptFlagBit;
}
switch (sampler.getSampleMode()) {
case GrSamplerState::kNormal_SampleMode:
stage.fCoordMapping = StageDesc::kIdentity_CoordMapping;
break;
case GrSamplerState::kRadial_SampleMode:
stage.fCoordMapping = StageDesc::kRadialGradient_CoordMapping;
break;
case GrSamplerState::kRadial2_SampleMode:
if (sampler.radial2IsDegenerate()) {
stage.fCoordMapping =
StageDesc::kRadial2GradientDegenerate_CoordMapping;
} else {
stage.fCoordMapping =
StageDesc::kRadial2Gradient_CoordMapping;
}
break;
case GrSamplerState::kSweep_SampleMode:
stage.fCoordMapping = StageDesc::kSweepGradient_CoordMapping;
break;
default:
GrCrash("Unexpected sample mode!");
break;
}
switch (sampler.getFilter()) {
// these both can use a regular texture2D()
case GrSamplerState::kNearest_Filter:
case GrSamplerState::kBilinear_Filter:
stage.fFetchMode = StageDesc::kSingle_FetchMode;
break;
// performs 4 texture2D()s
case GrSamplerState::k4x4Downsample_Filter:
stage.fFetchMode = StageDesc::k2x2_FetchMode;
break;
// performs fKernelWidth texture2D()s
case GrSamplerState::kConvolution_Filter:
stage.fFetchMode = StageDesc::kConvolution_FetchMode;
break;
case GrSamplerState::kDilate_Filter:
stage.fFetchMode = StageDesc::kDilate_FetchMode;
break;
case GrSamplerState::kErode_Filter:
stage.fFetchMode = StageDesc::kErode_FetchMode;
break;
default:
GrCrash("Unexpected filter!");
break;
}
if (sampler.hasTextureDomain()) {
GrAssert(GrSamplerState::kClamp_WrapMode ==
sampler.getWrapX() &&
GrSamplerState::kClamp_WrapMode ==
sampler.getWrapY());
stage.fOptFlags |= StageDesc::kCustomTextureDomain_OptFlagBit;
}
stage.fInConfigFlags = 0;
if (!this->glCaps().textureSwizzleSupport()) {
if (GrPixelConfigIsAlphaOnly(texture->config())) {
// if we don't have texture swizzle support then
// the shader must smear the single channel after
// reading the texture
if (this->glCaps().textureRedSupport()) {
// we can use R8 textures so use kSmearRed
stage.fInConfigFlags |=
StageDesc::kSmearRed_InConfigFlag;
} else {
// we can use A8 textures so use kSmearAlpha
stage.fInConfigFlags |=
StageDesc::kSmearAlpha_InConfigFlag;
}
} else if (sampler.swapsRAndB()) {
stage.fInConfigFlags |= StageDesc::kSwapRAndB_InConfigFlag;
}
}
if (GrPixelConfigIsUnpremultiplied(texture->config())) {
// The shader generator assumes that color channels are bytes
// when rounding.
GrAssert(4 == GrBytesPerPixel(texture->config()));
if (kUpOnWrite_DownOnRead_UnpremulConversion ==
fUnpremulConversion) {
stage.fInConfigFlags |=
StageDesc::kMulRGBByAlpha_RoundDown_InConfigFlag;
} else {
stage.fInConfigFlags |=
StageDesc::kMulRGBByAlpha_RoundUp_InConfigFlag;
}
}
if (sampler.getFilter() == GrSamplerState::kDilate_Filter ||
sampler.getFilter() == GrSamplerState::kErode_Filter) {
stage.fKernelWidth = sampler.getKernelWidth();
} else {
stage.fKernelWidth = 0;
}
setup_custom_stage(&stage, sampler, customStages,
&fCurrentProgram, s);
} else {
stage.fOptFlags = 0;
stage.fCoordMapping = (StageDesc::CoordMapping) 0;
stage.fInConfigFlags = 0;
stage.fFetchMode = (StageDesc::FetchMode) 0;
stage.fKernelWidth = 0;
stage.fCustomStageKey = 0;
customStages[s] = NULL;
}
}
if (GrPixelConfigIsUnpremultiplied(drawState.getRenderTarget()->config())) {
// The shader generator assumes that color channels are bytes
// when rounding.
GrAssert(4 == GrBytesPerPixel(drawState.getRenderTarget()->config()));
if (kUpOnWrite_DownOnRead_UnpremulConversion == fUnpremulConversion) {
desc.fOutputConfig =
ProgramDesc::kUnpremultiplied_RoundUp_OutputConfig;
} else {
desc.fOutputConfig =
ProgramDesc::kUnpremultiplied_RoundDown_OutputConfig;
}
} else {
desc.fOutputConfig = ProgramDesc::kPremultiplied_OutputConfig;
}
desc.fDualSrcOutput = ProgramDesc::kNone_DualSrcOutput;
// currently the experimental GS will only work with triangle prims
// (and it doesn't do anything other than pass through values from
// the VS to the FS anyway).
#if 0 && GR_GL_EXPERIMENTAL_GS
desc.fExperimentalGS = this->getCaps().fGeometryShaderSupport;
#endif
// we want to avoid generating programs with different "first cov stage"
// values when they would compute the same result.
// We set field in the desc to kNumStages when either there are no
// coverage stages or the distinction between coverage and color is
// immaterial.
int firstCoverageStage = GrDrawState::kNumStages;
desc.fFirstCoverageStage = GrDrawState::kNumStages;
bool hasCoverage = drawState.getFirstCoverageStage() <= lastEnabledStage;
if (hasCoverage) {
firstCoverageStage = drawState.getFirstCoverageStage();
}
// other coverage inputs
if (!hasCoverage) {
hasCoverage =
requiresAttributeCoverage ||
(desc.fVertexLayout & GrDrawTarget::kEdge_VertexLayoutBit);
}
if (hasCoverage) {
// color filter is applied between color/coverage computation
if (SkXfermode::kDst_Mode != desc.fColorFilterXfermode) {
desc.fFirstCoverageStage = firstCoverageStage;
}
if (this->getCaps().fDualSourceBlendingSupport &&
!(blendOpts & (kEmitCoverage_BlendOptFlag |
kCoverageAsAlpha_BlendOptFlag))) {
if (kZero_BlendCoeff == dstCoeff) {
// write the coverage value to second color
desc.fDualSrcOutput = ProgramDesc::kCoverage_DualSrcOutput;
desc.fFirstCoverageStage = firstCoverageStage;
} else if (kSA_BlendCoeff == dstCoeff) {
// SA dst coeff becomes 1-(1-SA)*coverage when dst is partially
// cover
desc.fDualSrcOutput = ProgramDesc::kCoverageISA_DualSrcOutput;
desc.fFirstCoverageStage = firstCoverageStage;
} else if (kSC_BlendCoeff == dstCoeff) {
// SA dst coeff becomes 1-(1-SA)*coverage when dst is partially
// cover
desc.fDualSrcOutput = ProgramDesc::kCoverageISC_DualSrcOutput;
desc.fFirstCoverageStage = firstCoverageStage;
}
}
}
}
