/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrBezierEffect.h"
#include "GrShaderCaps.h"
#include "glsl/GrGLSLFragmentShaderBuilder.h"
#include "glsl/GrGLSLGeometryProcessor.h"
#include "glsl/GrGLSLProgramDataManager.h"
#include "glsl/GrGLSLUniformHandler.h"
#include "glsl/GrGLSLUtil.h"
#include "glsl/GrGLSLVarying.h"
#include "glsl/GrGLSLVertexShaderBuilder.h"
class GrGLConicEffect : public GrGLSLGeometryProcessor {
public:
GrGLConicEffect(const GrGeometryProcessor&);
void onEmitCode(EmitArgs&, GrGPArgs*) override;
static inline void GenKey(const GrGeometryProcessor&,
const GrShaderCaps&,
GrProcessorKeyBuilder*);
void setData(const GrGLSLProgramDataManager& pdman, const GrPrimitiveProcessor& primProc,
FPCoordTransformIter&& transformIter) override {
const GrConicEffect& ce = primProc.cast<GrConicEffect>();
if (!ce.viewMatrix().isIdentity() && !fViewMatrix.cheapEqualTo(ce.viewMatrix())) {
fViewMatrix = ce.viewMatrix();
float viewMatrix[3 * 3];
GrGLSLGetMatrix<3>(viewMatrix, fViewMatrix);
pdman.setMatrix3f(fViewMatrixUniform, viewMatrix);
}
if (ce.color() != fColor) {
float c[4];
GrColorToRGBAFloat(ce.color(), c);
pdman.set4fv(fColorUniform, 1, c);
fColor = ce.color();
}
if (ce.coverageScale() != 0xff && ce.coverageScale() != fCoverageScale) {
pdman.set1f(fCoverageScaleUniform, GrNormalizeByteToFloat(ce.coverageScale()));
fCoverageScale = ce.coverageScale();
}
this->setTransformDataHelper(ce.localMatrix(), pdman, &transformIter);
}
private:
SkMatrix fViewMatrix;
GrColor fColor;
uint8_t fCoverageScale;
GrPrimitiveEdgeType fEdgeType;
UniformHandle fColorUniform;
UniformHandle fCoverageScaleUniform;
UniformHandle fViewMatrixUniform;
typedef GrGLSLGeometryProcessor INHERITED;
};
GrGLConicEffect::GrGLConicEffect(const GrGeometryProcessor& processor)
: fViewMatrix(SkMatrix::InvalidMatrix()), fColor(GrColor_ILLEGAL), fCoverageScale(0xff) {
const GrConicEffect& ce = processor.cast<GrConicEffect>();
fEdgeType = ce.getEdgeType();
}
void GrGLConicEffect::onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) {
GrGLSLVertexBuilder* vertBuilder = args.fVertBuilder;
const GrConicEffect& gp = args.fGP.cast<GrConicEffect>();
GrGLSLVaryingHandler* varyingHandler = args.fVaryingHandler;
GrGLSLUniformHandler* uniformHandler = args.fUniformHandler;
// emit attributes
varyingHandler->emitAttributes(gp);
GrGLSLVertToFrag v(kVec4f_GrSLType);
varyingHandler->addVarying("ConicCoeffs", &v, kHigh_GrSLPrecision);
vertBuilder->codeAppendf("%s = %s;", v.vsOut(), gp.inConicCoeffs()->fName);
GrGLSLPPFragmentBuilder* fragBuilder = args.fFragBuilder;
// Setup pass through color
this->setupUniformColor(fragBuilder, uniformHandler, args.fOutputColor, &fColorUniform);
// Setup position
this->setupPosition(vertBuilder,
uniformHandler,
gpArgs,
gp.inPosition()->fName,
gp.viewMatrix(),
&fViewMatrixUniform);
// emit transforms with position
this->emitTransforms(vertBuilder,
varyingHandler,
uniformHandler,
gpArgs->fPositionVar,
gp.inPosition()->fName,
gp.localMatrix(),
args.fFPCoordTransformHandler);
// TODO: this precision check should actually be a check on the number of bits
// high and medium provide and the selection of the lowest level that suffices.
// Additionally we should assert that the upstream code only lets us get here if
// either high or medium provides the required number of bits.
GrSLPrecision precision = kHigh_GrSLPrecision;
const GrShaderCaps::PrecisionInfo& highP = args.fShaderCaps->getFloatShaderPrecisionInfo(
kFragment_GrShaderType,
kHigh_GrSLPrecision);
if (!highP.supported()) {
precision = kMedium_GrSLPrecision;
}
GrShaderVar edgeAlpha("edgeAlpha", kFloat_GrSLType, 0, precision);
GrShaderVar dklmdx("dklmdx", kVec3f_GrSLType, 0, precision);
GrShaderVar dklmdy("dklmdy", kVec3f_GrSLType, 0, precision);
GrShaderVar dfdx("dfdx", kFloat_GrSLType, 0, precision);
GrShaderVar dfdy("dfdy", kFloat_GrSLType, 0, precision);
GrShaderVar gF("gF", kVec2f_GrSLType, 0, precision);
GrShaderVar gFM("gFM", kFloat_GrSLType, 0, precision);
GrShaderVar func("func", kFloat_GrSLType, 0, precision);
fragBuilder->declAppend(edgeAlpha);
fragBuilder->declAppend(dklmdx);
fragBuilder->declAppend(dklmdy);
fragBuilder->declAppend(dfdx);
fragBuilder->declAppend(dfdy);
fragBuilder->declAppend(gF);
fragBuilder->declAppend(gFM);
fragBuilder->declAppend(func);
switch (fEdgeType) {
case kHairlineAA_GrProcessorEdgeType: {
fragBuilder->codeAppendf("%s = dFdx(%s.xyz);", dklmdx.c_str(), v.fsIn());
fragBuilder->codeAppendf("%s = dFdy(%s.xyz);", dklmdy.c_str(), v.fsIn());
fragBuilder->codeAppendf("%s = 2.0 * %s.x * %s.x - %s.y * %s.z - %s.z * %s.y;",
dfdx.c_str(),
v.fsIn(), dklmdx.c_str(),
v.fsIn(), dklmdx.c_str(),
v.fsIn(), dklmdx.c_str());
fragBuilder->codeAppendf("%s = 2.0 * %s.x * %s.x - %s.y * %s.z - %s.z * %s.y;",
dfdy.c_str(),
v.fsIn(), dklmdy.c_str(),
v.fsIn(), dklmdy.c_str(),
v.fsIn(), dklmdy.c_str());
fragBuilder->codeAppendf("%s = vec2(%s, %s);", gF.c_str(), dfdx.c_str(), dfdy.c_str());
fragBuilder->codeAppendf("%s = sqrt(dot(%s, %s));",
gFM.c_str(), gF.c_str(), gF.c_str());
fragBuilder->codeAppendf("%s = %s.x*%s.x - %s.y*%s.z;",
func.c_str(), v.fsIn(), v.fsIn(), v.fsIn(), v.fsIn());
fragBuilder->codeAppendf("%s = abs(%s);", func.c_str(), func.c_str());
fragBuilder->codeAppendf("%s = %s / %s;",
edgeAlpha.c_str(), func.c_str(), gFM.c_str());
fragBuilder->codeAppendf("%s = max(1.0 - %s, 0.0);",
edgeAlpha.c_str(), edgeAlpha.c_str());
// Add line below for smooth cubic ramp
// fragBuilder->codeAppend("edgeAlpha = edgeAlpha*edgeAlpha*(3.0-2.0*edgeAlpha);");
break;
}
case kFillAA_GrProcessorEdgeType: {
fragBuilder->codeAppendf("%s = dFdx(%s.xyz);", dklmdx.c_str(), v.fsIn());
fragBuilder->codeAppendf("%s = dFdy(%s.xyz);", dklmdy.c_str(), v.fsIn());
fragBuilder->codeAppendf("%s ="
"2.0 * %s.x * %s.x - %s.y * %s.z - %s.z * %s.y;",
dfdx.c_str(),
v.fsIn(), dklmdx.c_str(),
v.fsIn(), dklmdx.c_str(),
v.fsIn(), dklmdx.c_str());
fragBuilder->codeAppendf("%s ="
"2.0 * %s.x * %s.x - %s.y * %s.z - %s.z * %s.y;",
dfdy.c_str(),
v.fsIn(), dklmdy.c_str(),
v.fsIn(), dklmdy.c_str(),
v.fsIn(), dklmdy.c_str());
fragBuilder->codeAppendf("%s = vec2(%s, %s);", gF.c_str(), dfdx.c_str(), dfdy.c_str());
fragBuilder->codeAppendf("%s = sqrt(dot(%s, %s));",
gFM.c_str(), gF.c_str(), gF.c_str());
fragBuilder->codeAppendf("%s = %s.x * %s.x - %s.y * %s.z;",
func.c_str(), v.fsIn(), v.fsIn(), v.fsIn(), v.fsIn());
fragBuilder->codeAppendf("%s = %s / %s;",
edgeAlpha.c_str(), func.c_str(), gFM.c_str());
fragBuilder->codeAppendf("%s = clamp(0.5 - %s, 0.0, 1.0);",
edgeAlpha.c_str(), edgeAlpha.c_str());
// Add line below for smooth cubic ramp
// fragBuilder->codeAppend("edgeAlpha = edgeAlpha*edgeAlpha*(3.0-2.0*edgeAlpha);");
break;
}
case kFillBW_GrProcessorEdgeType: {
fragBuilder->codeAppendf("%s = %s.x * %s.x - %s.y * %s.z;",
edgeAlpha.c_str(), v.fsIn(), v.fsIn(), v.fsIn(), v.fsIn());
fragBuilder->codeAppendf("%s = float(%s < 0.0);",
edgeAlpha.c_str(), edgeAlpha.c_str());
break;
}
default:
SkFAIL("Shouldn't get here");
}
// TODO should we really be doing this?
if (gp.coverageScale() != 0xff) {
const char* coverageScale;
fCoverageScaleUniform = uniformHandler->addUniform(kFragment_GrShaderFlag,
kFloat_GrSLType,
kHigh_GrSLPrecision,
"Coverage",
&coverageScale);
fragBuilder->codeAppendf("%s = vec4(%s * %s);",
args.fOutputCoverage, coverageScale, edgeAlpha.c_str());
} else {
fragBuilder->codeAppendf("%s = vec4(%s);", args.fOutputCoverage, edgeAlpha.c_str());
}
}
void GrGLConicEffect::GenKey(const GrGeometryProcessor& gp,
const GrShaderCaps&,
GrProcessorKeyBuilder* b) {
const GrConicEffect& ce = gp.cast<GrConicEffect>();
uint32_t key = ce.isAntiAliased() ? (ce.isFilled() ? 0x0 : 0x1) : 0x2;
key |= 0xff != ce.coverageScale() ? 0x8 : 0x0;
key |= ce.usesLocalCoords() && ce.localMatrix().hasPerspective() ? 0x10 : 0x0;
key |= ComputePosKey(ce.viewMatrix()) << 5;
b->add32(key);
}
//////////////////////////////////////////////////////////////////////////////
GrConicEffect::~GrConicEffect() {}
void GrConicEffect::getGLSLProcessorKey(const GrShaderCaps& caps,
GrProcessorKeyBuilder* b) const {
GrGLConicEffect::GenKey(*this, caps, b);
}
GrGLSLPrimitiveProcessor* GrConicEffect::createGLSLInstance(const GrShaderCaps&) const {
return new GrGLConicEffect(*this);
}
GrConicEffect::GrConicEffect(GrColor color, const SkMatrix& viewMatrix, uint8_t coverage,
GrPrimitiveEdgeType edgeType, const SkMatrix& localMatrix,
bool usesLocalCoords)
: fColor(color)
, fViewMatrix(viewMatrix)
, fLocalMatrix(viewMatrix)
, fUsesLocalCoords(usesLocalCoords)
, fCoverageScale(coverage)
, fEdgeType(edgeType) {
this->initClassID<GrConicEffect>();
fInPosition = &this->addVertexAttrib("inPosition", kVec2f_GrVertexAttribType,
kHigh_GrSLPrecision);
fInConicCoeffs = &this->addVertexAttrib("inConicCoeffs", kVec4f_GrVertexAttribType);
}
//////////////////////////////////////////////////////////////////////////////
GR_DEFINE_GEOMETRY_PROCESSOR_TEST(GrConicEffect);
#if GR_TEST_UTILS
sk_sp<GrGeometryProcessor> GrConicEffect::TestCreate(GrProcessorTestData* d) {
sk_sp<GrGeometryProcessor> gp;
do {
GrPrimitiveEdgeType edgeType =
static_cast<GrPrimitiveEdgeType>(
d->fRandom->nextULessThan(kGrProcessorEdgeTypeCnt));
gp = GrConicEffect::Make(GrRandomColor(d->fRandom), GrTest::TestMatrix(d->fRandom),
edgeType, *d->caps(), GrTest::TestMatrix(d->fRandom),
d->fRandom->nextBool());
} while (nullptr == gp);
return gp;
}
#endif
//////////////////////////////////////////////////////////////////////////////
// Quad
//////////////////////////////////////////////////////////////////////////////
class GrGLQuadEffect : public GrGLSLGeometryProcessor {
public:
GrGLQuadEffect(const GrGeometryProcessor&);
void onEmitCode(EmitArgs&, GrGPArgs*) override;
static inline void GenKey(const GrGeometryProcessor&,
const GrShaderCaps&,
GrProcessorKeyBuilder*);
void setData(const GrGLSLProgramDataManager& pdman, const GrPrimitiveProcessor& primProc,
FPCoordTransformIter&& transformIter) override {
const GrQuadEffect& qe = primProc.cast<GrQuadEffect>();
if (!qe.viewMatrix().isIdentity() && !fViewMatrix.cheapEqualTo(qe.viewMatrix())) {
fViewMatrix = qe.viewMatrix();
float viewMatrix[3 * 3];
GrGLSLGetMatrix<3>(viewMatrix, fViewMatrix);
pdman.setMatrix3f(fViewMatrixUniform, viewMatrix);
}
if (qe.color() != fColor) {
float c[4];
GrColorToRGBAFloat(qe.color(), c);
pdman.set4fv(fColorUniform, 1, c);
fColor = qe.color();
}
if (qe.coverageScale() != 0xff && qe.coverageScale() != fCoverageScale) {
pdman.set1f(fCoverageScaleUniform, GrNormalizeByteToFloat(qe.coverageScale()));
fCoverageScale = qe.coverageScale();
}
this->setTransformDataHelper(qe.localMatrix(), pdman, &transformIter);
}
private:
SkMatrix fViewMatrix;
GrColor fColor;
uint8_t fCoverageScale;
GrPrimitiveEdgeType fEdgeType;
UniformHandle fColorUniform;
UniformHandle fCoverageScaleUniform;
UniformHandle fViewMatrixUniform;
typedef GrGLSLGeometryProcessor INHERITED;
};
GrGLQuadEffect::GrGLQuadEffect(const GrGeometryProcessor& processor)
: fViewMatrix(SkMatrix::InvalidMatrix()), fColor(GrColor_ILLEGAL), fCoverageScale(0xff) {
const GrQuadEffect& ce = processor.cast<GrQuadEffect>();
fEdgeType = ce.getEdgeType();
}
void GrGLQuadEffect::onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) {
GrGLSLVertexBuilder* vertBuilder = args.fVertBuilder;
const GrQuadEffect& gp = args.fGP.cast<GrQuadEffect>();
GrGLSLVaryingHandler* varyingHandler = args.fVaryingHandler;
GrGLSLUniformHandler* uniformHandler = args.fUniformHandler;
// emit attributes
varyingHandler->emitAttributes(gp);
GrGLSLVertToFrag v(kVec4f_GrSLType);
varyingHandler->addVarying("HairQuadEdge", &v);
vertBuilder->codeAppendf("%s = %s;", v.vsOut(), gp.inHairQuadEdge()->fName);
GrGLSLPPFragmentBuilder* fragBuilder = args.fFragBuilder;
// Setup pass through color
this->setupUniformColor(fragBuilder, uniformHandler, args.fOutputColor, &fColorUniform);
// Setup position
this->setupPosition(vertBuilder,
uniformHandler,
gpArgs,
gp.inPosition()->fName,
gp.viewMatrix(),
&fViewMatrixUniform);
// emit transforms with position
this->emitTransforms(vertBuilder,
varyingHandler,
uniformHandler,
gpArgs->fPositionVar,
gp.inPosition()->fName,
gp.localMatrix(),
args.fFPCoordTransformHandler);
fragBuilder->codeAppendf("float edgeAlpha;");
switch (fEdgeType) {
case kHairlineAA_GrProcessorEdgeType: {
fragBuilder->codeAppendf("vec2 duvdx = dFdx(%s.xy);", v.fsIn());
fragBuilder->codeAppendf("vec2 duvdy = dFdy(%s.xy);", v.fsIn());
fragBuilder->codeAppendf("vec2 gF = vec2(2.0 * %s.x * duvdx.x - duvdx.y,"
" 2.0 * %s.x * duvdy.x - duvdy.y);",
v.fsIn(), v.fsIn());
fragBuilder->codeAppendf("edgeAlpha = (%s.x * %s.x - %s.y);",
v.fsIn(), v.fsIn(), v.fsIn());
fragBuilder->codeAppend("edgeAlpha = sqrt(edgeAlpha * edgeAlpha / dot(gF, gF));");
fragBuilder->codeAppend("edgeAlpha = max(1.0 - edgeAlpha, 0.0);");
// Add line below for smooth cubic ramp
// fragBuilder->codeAppend("edgeAlpha = edgeAlpha*edgeAlpha*(3.0-2.0*edgeAlpha);");
break;
}
case kFillAA_GrProcessorEdgeType: {
fragBuilder->codeAppendf("vec2 duvdx = dFdx(%s.xy);", v.fsIn());
fragBuilder->codeAppendf("vec2 duvdy = dFdy(%s.xy);", v.fsIn());
fragBuilder->codeAppendf("vec2 gF = vec2(2.0 * %s.x * duvdx.x - duvdx.y,"
" 2.0 * %s.x * duvdy.x - duvdy.y);",
v.fsIn(), v.fsIn());
fragBuilder->codeAppendf("edgeAlpha = (%s.x * %s.x - %s.y);",
v.fsIn(), v.fsIn(), v.fsIn());
fragBuilder->codeAppend("edgeAlpha = edgeAlpha / sqrt(dot(gF, gF));");
fragBuilder->codeAppend("edgeAlpha = clamp(0.5 - edgeAlpha, 0.0, 1.0);");
// Add line below for smooth cubic ramp
// fragBuilder->codeAppend("edgeAlpha = edgeAlpha*edgeAlpha*(3.0-2.0*edgeAlpha);");
break;
}
case kFillBW_GrProcessorEdgeType: {
fragBuilder->codeAppendf("edgeAlpha = (%s.x * %s.x - %s.y);",
v.fsIn(), v.fsIn(), v.fsIn());
fragBuilder->codeAppend("edgeAlpha = float(edgeAlpha < 0.0);");
break;
}
default:
SkFAIL("Shouldn't get here");
}
if (0xff != gp.coverageScale()) {
const char* coverageScale;
fCoverageScaleUniform = uniformHandler->addUniform(kFragment_GrShaderFlag,
kFloat_GrSLType,
kDefault_GrSLPrecision,
"Coverage",
&coverageScale);
fragBuilder->codeAppendf("%s = vec4(%s * edgeAlpha);", args.fOutputCoverage, coverageScale);
} else {
fragBuilder->codeAppendf("%s = vec4(edgeAlpha);", args.fOutputCoverage);
}
}
void GrGLQuadEffect::GenKey(const GrGeometryProcessor& gp,
const GrShaderCaps&,
GrProcessorKeyBuilder* b) {
const GrQuadEffect& ce = gp.cast<GrQuadEffect>();
uint32_t key = ce.isAntiAliased() ? (ce.isFilled() ? 0x0 : 0x1) : 0x2;
key |= ce.coverageScale() != 0xff ? 0x8 : 0x0;
key |= ce.usesLocalCoords() && ce.localMatrix().hasPerspective() ? 0x10 : 0x0;
key |= ComputePosKey(ce.viewMatrix()) << 5;
b->add32(key);
}
//////////////////////////////////////////////////////////////////////////////
GrQuadEffect::~GrQuadEffect() {}
void GrQuadEffect::getGLSLProcessorKey(const GrShaderCaps& caps,
GrProcessorKeyBuilder* b) const {
GrGLQuadEffect::GenKey(*this, caps, b);
}
GrGLSLPrimitiveProcessor* GrQuadEffect::createGLSLInstance(const GrShaderCaps&) const {
return new GrGLQuadEffect(*this);
}
GrQuadEffect::GrQuadEffect(GrColor color, const SkMatrix& viewMatrix, uint8_t coverage,
GrPrimitiveEdgeType edgeType, const SkMatrix& localMatrix,
bool usesLocalCoords)
: fColor(color)
, fViewMatrix(viewMatrix)
, fLocalMatrix(localMatrix)
, fUsesLocalCoords(usesLocalCoords)
, fCoverageScale(coverage)
, fEdgeType(edgeType) {
this->initClassID<GrQuadEffect>();
fInPosition = &this->addVertexAttrib("inPosition", kVec2f_GrVertexAttribType,
kHigh_GrSLPrecision);
fInHairQuadEdge = &this->addVertexAttrib("inHairQuadEdge", kVec4f_GrVertexAttribType);
}
//////////////////////////////////////////////////////////////////////////////
GR_DEFINE_GEOMETRY_PROCESSOR_TEST(GrQuadEffect);
#if GR_TEST_UTILS
sk_sp<GrGeometryProcessor> GrQuadEffect::TestCreate(GrProcessorTestData* d) {
sk_sp<GrGeometryProcessor> gp;
do {
GrPrimitiveEdgeType edgeType = static_cast<GrPrimitiveEdgeType>(
d->fRandom->nextULessThan(kGrProcessorEdgeTypeCnt));
gp = GrQuadEffect::Make(GrRandomColor(d->fRandom), GrTest::TestMatrix(d->fRandom), edgeType,
*d->caps(), GrTest::TestMatrix(d->fRandom),
d->fRandom->nextBool());
} while (nullptr == gp);
return gp;
}
#endif
//////////////////////////////////////////////////////////////////////////////
// Cubic
//////////////////////////////////////////////////////////////////////////////
class GrGLCubicEffect : public GrGLSLGeometryProcessor {
public:
GrGLCubicEffect(const GrGeometryProcessor&);
void onEmitCode(EmitArgs&, GrGPArgs*) override;
static inline void GenKey(const GrGeometryProcessor&,
const GrShaderCaps&,
GrProcessorKeyBuilder*);
void setData(const GrGLSLProgramDataManager& pdman, const GrPrimitiveProcessor& primProc,
FPCoordTransformIter&& transformIter) override {
const GrCubicEffect& ce = primProc.cast<GrCubicEffect>();
if (!ce.viewMatrix().isIdentity() && !fViewMatrix.cheapEqualTo(ce.viewMatrix())) {
fViewMatrix = ce.viewMatrix();
float viewMatrix[3 * 3];
GrGLSLGetMatrix<3>(viewMatrix, fViewMatrix);
pdman.setMatrix3f(fViewMatrixUniform, viewMatrix);
}
if (ce.color() != fColor) {
float c[4];
GrColorToRGBAFloat(ce.color(), c);
pdman.set4fv(fColorUniform, 1, c);
fColor = ce.color();
}
this->setTransformDataHelper(SkMatrix::I(), pdman, &transformIter);
}
private:
SkMatrix fViewMatrix;
GrColor fColor;
GrPrimitiveEdgeType fEdgeType;
UniformHandle fColorUniform;
UniformHandle fViewMatrixUniform;
typedef GrGLSLGeometryProcessor INHERITED;
};
GrGLCubicEffect::GrGLCubicEffect(const GrGeometryProcessor& processor)
: fViewMatrix(SkMatrix::InvalidMatrix()), fColor(GrColor_ILLEGAL) {
const GrCubicEffect& ce = processor.cast<GrCubicEffect>();
fEdgeType = ce.getEdgeType();
}
void GrGLCubicEffect::onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) {
GrGLSLVertexBuilder* vertBuilder = args.fVertBuilder;
const GrCubicEffect& gp = args.fGP.cast<GrCubicEffect>();
GrGLSLVaryingHandler* varyingHandler = args.fVaryingHandler;
GrGLSLUniformHandler* uniformHandler = args.fUniformHandler;
// emit attributes
varyingHandler->emitAttributes(gp);
GrGLSLVertToFrag v(kVec4f_GrSLType);
varyingHandler->addVarying("CubicCoeffs", &v, kHigh_GrSLPrecision);
vertBuilder->codeAppendf("%s = %s;", v.vsOut(), gp.inCubicCoeffs()->fName);
GrGLSLPPFragmentBuilder* fragBuilder = args.fFragBuilder;
// Setup pass through color
if (!gp.colorIgnored()) {
this->setupUniformColor(fragBuilder, uniformHandler, args.fOutputColor, &fColorUniform);
}
// Setup position
this->setupPosition(vertBuilder,
uniformHandler,
gpArgs,
gp.inPosition()->fName,
gp.viewMatrix(),
&fViewMatrixUniform);
// emit transforms with position
this->emitTransforms(vertBuilder,
varyingHandler,
uniformHandler,
gpArgs->fPositionVar,
gp.inPosition()->fName,
args.fFPCoordTransformHandler);
GrShaderVar edgeAlpha("edgeAlpha", kFloat_GrSLType, 0, kHigh_GrSLPrecision);
GrShaderVar dklmdx("dklmdx", kVec3f_GrSLType, 0, kHigh_GrSLPrecision);
GrShaderVar dklmdy("dklmdy", kVec3f_GrSLType, 0, kHigh_GrSLPrecision);
GrShaderVar dfdx("dfdx", kFloat_GrSLType, 0, kHigh_GrSLPrecision);
GrShaderVar dfdy("dfdy", kFloat_GrSLType, 0, kHigh_GrSLPrecision);
GrShaderVar gF("gF", kVec2f_GrSLType, 0, kHigh_GrSLPrecision);
GrShaderVar gFM("gFM", kFloat_GrSLType, 0, kHigh_GrSLPrecision);
GrShaderVar func("func", kFloat_GrSLType, 0, kHigh_GrSLPrecision);
fragBuilder->declAppend(edgeAlpha);
fragBuilder->declAppend(dklmdx);
fragBuilder->declAppend(dklmdy);
fragBuilder->declAppend(dfdx);
fragBuilder->declAppend(dfdy);
fragBuilder->declAppend(gF);
fragBuilder->declAppend(gFM);
fragBuilder->declAppend(func);
switch (fEdgeType) {
case kHairlineAA_GrProcessorEdgeType: {
fragBuilder->codeAppendf("%s = dFdx(%s.xyz);", dklmdx.c_str(), v.fsIn());
fragBuilder->codeAppendf("%s = dFdy(%s.xyz);", dklmdy.c_str(), v.fsIn());
fragBuilder->codeAppendf("%s = 3.0 * %s.x * %s.x * %s.x - %s.y * %s.z - %s.z * %s.y;",
dfdx.c_str(), v.fsIn(), v.fsIn(), dklmdx.c_str(), v.fsIn(),
dklmdx.c_str(), v.fsIn(), dklmdx.c_str());
fragBuilder->codeAppendf("%s = 3.0 * %s.x * %s.x * %s.x - %s.y * %s.z - %s.z * %s.y;",
dfdy.c_str(), v.fsIn(), v.fsIn(), dklmdy.c_str(), v.fsIn(),
dklmdy.c_str(), v.fsIn(), dklmdy.c_str());
fragBuilder->codeAppendf("%s = vec2(%s, %s);", gF.c_str(), dfdx.c_str(), dfdy.c_str());
fragBuilder->codeAppendf("%s = sqrt(dot(%s, %s));",
gFM.c_str(), gF.c_str(), gF.c_str());
fragBuilder->codeAppendf("%s = %s.x * %s.x * %s.x - %s.y * %s.z;",
func.c_str(), v.fsIn(), v.fsIn(),
v.fsIn(), v.fsIn(), v.fsIn());
fragBuilder->codeAppendf("%s = abs(%s);", func.c_str(), func.c_str());
fragBuilder->codeAppendf("%s = %s / %s;",
edgeAlpha.c_str(), func.c_str(), gFM.c_str());
fragBuilder->codeAppendf("%s = max(1.0 - %s, 0.0);",
edgeAlpha.c_str(), edgeAlpha.c_str());
// Add line below for smooth cubic ramp
// fragBuilder->codeAppendf("%s = %s * %s * (3.0 - 2.0 * %s);",
// edgeAlpha.c_str(), edgeAlpha.c_str(), edgeAlpha.c_str(),
// edgeAlpha.c_str());
break;
}
case kFillAA_GrProcessorEdgeType: {
fragBuilder->codeAppendf("%s = dFdx(%s.xyz);", dklmdx.c_str(), v.fsIn());
fragBuilder->codeAppendf("%s = dFdy(%s.xyz);", dklmdy.c_str(), v.fsIn());
fragBuilder->codeAppendf("%s ="
"3.0 * %s.x * %s.x * %s.x - %s.y * %s.z - %s.z * %s.y;",
dfdx.c_str(), v.fsIn(), v.fsIn(), dklmdx.c_str(), v.fsIn(),
dklmdx.c_str(), v.fsIn(), dklmdx.c_str());
fragBuilder->codeAppendf("%s = 3.0 * %s.x * %s.x * %s.x - %s.y * %s.z - %s.z * %s.y;",
dfdy.c_str(), v.fsIn(), v.fsIn(), dklmdy.c_str(), v.fsIn(),
dklmdy.c_str(), v.fsIn(), dklmdy.c_str());
fragBuilder->codeAppendf("%s = vec2(%s, %s);", gF.c_str(), dfdx.c_str(), dfdy.c_str());
fragBuilder->codeAppendf("%s = sqrt(dot(%s, %s));",
gFM.c_str(), gF.c_str(), gF.c_str());
fragBuilder->codeAppendf("%s = %s.x * %s.x * %s.x - %s.y * %s.z;",
func.c_str(),
v.fsIn(), v.fsIn(), v.fsIn(), v.fsIn(), v.fsIn());
fragBuilder->codeAppendf("%s = %s / %s;",
edgeAlpha.c_str(), func.c_str(), gFM.c_str());
fragBuilder->codeAppendf("%s = clamp(0.5 - %s, 0.0, 1.0);",
edgeAlpha.c_str(), edgeAlpha.c_str());
// Add line below for smooth cubic ramp
// fragBuilder->codeAppendf("%s = %s * %s * (3.0 - 2.0 * %s);",
// edgeAlpha.c_str(), edgeAlpha.c_str(), edgeAlpha.c_str(),
// edgeAlpha.c_str());
break;
}
case kFillBW_GrProcessorEdgeType: {
fragBuilder->codeAppendf("%s = %s.x * %s.x * %s.x - %s.y * %s.z;",
edgeAlpha.c_str(), v.fsIn(), v.fsIn(),
v.fsIn(), v.fsIn(), v.fsIn());
fragBuilder->codeAppendf("%s = float(%s < 0.0);", edgeAlpha.c_str(), edgeAlpha.c_str());
break;
}
default:
SkFAIL("Shouldn't get here");
}
fragBuilder->codeAppendf("%s = vec4(%s);", args.fOutputCoverage, edgeAlpha.c_str());
}
void GrGLCubicEffect::GenKey(const GrGeometryProcessor& gp,
const GrShaderCaps&,
GrProcessorKeyBuilder* b) {
const GrCubicEffect& ce = gp.cast<GrCubicEffect>();
uint32_t key = ce.isAntiAliased() ? (ce.isFilled() ? 0x0 : 0x1) : 0x2;
key |= ComputePosKey(ce.viewMatrix()) << 5;
b->add32(key);
}
//////////////////////////////////////////////////////////////////////////////
GrCubicEffect::~GrCubicEffect() {}
void GrCubicEffect::getGLSLProcessorKey(const GrShaderCaps& caps, GrProcessorKeyBuilder* b) const {
GrGLCubicEffect::GenKey(*this, caps, b);
}
GrGLSLPrimitiveProcessor* GrCubicEffect::createGLSLInstance(const GrShaderCaps&) const {
return new GrGLCubicEffect(*this);
}
GrCubicEffect::GrCubicEffect(GrColor color, const SkMatrix& viewMatrix,
GrPrimitiveEdgeType edgeType)
: fColor(color)
, fViewMatrix(viewMatrix)
, fEdgeType(edgeType) {
this->initClassID<GrCubicEffect>();
fInPosition = &this->addVertexAttrib("inPosition", kVec2f_GrVertexAttribType,
kHigh_GrSLPrecision);
fInCubicCoeffs = &this->addVertexAttrib("inCubicCoeffs", kVec4f_GrVertexAttribType);
}
//////////////////////////////////////////////////////////////////////////////
GR_DEFINE_GEOMETRY_PROCESSOR_TEST(GrCubicEffect);
#if GR_TEST_UTILS
sk_sp<GrGeometryProcessor> GrCubicEffect::TestCreate(GrProcessorTestData* d) {
sk_sp<GrGeometryProcessor> gp;
do {
GrPrimitiveEdgeType edgeType =
static_cast<GrPrimitiveEdgeType>(
d->fRandom->nextULessThan(kGrProcessorEdgeTypeCnt));
gp = GrCubicEffect::Make(GrRandomColor(d->fRandom), GrTest::TestMatrix(d->fRandom),
edgeType, *d->caps());
} while (nullptr == gp);
return gp;
}
#endif