src/gpu/effects/GrTextureDomain.cpp - skia - Git at Google

 /*
  * 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 "GrTextureDomain.h"
 #include "GrSimpleTextureEffect.h"
 #include "GrTBackendEffectFactory.h"
 #include "gl/GrGLEffect.h"
 #include "SkFloatingPoint.h"


 GrTextureDomain::GrTextureDomain(const SkRect& domain, Mode mode, int index)
     : fIndex(index) {

     static const SkRect kFullRect = {0, 0, SK_Scalar1, SK_Scalar1};
     if (domain.contains(kFullRect) && kClamp_Mode == mode) {
         fMode = kIgnore_Mode;
     } else {
         fMode = mode;
     }

     if (fMode != kIgnore_Mode) {
         // We don't currently handle domains that are empty or don't intersect the texture.
         // It is OK if the domain rect is a line or point, but it should not be inverted. We do not
         // handle rects that do not intersect the [0..1]x[0..1] rect.
         SkASSERT(domain.fLeft <= domain.fRight);
         SkASSERT(domain.fTop <= domain.fBottom);
         fDomain.fLeft = SkMaxScalar(domain.fLeft, kFullRect.fLeft);
         fDomain.fRight = SkMinScalar(domain.fRight, kFullRect.fRight);
         fDomain.fTop = SkMaxScalar(domain.fTop, kFullRect.fTop);
         fDomain.fBottom = SkMinScalar(domain.fBottom, kFullRect.fBottom);
         SkASSERT(fDomain.fLeft <= fDomain.fRight);
         SkASSERT(fDomain.fTop <= fDomain.fBottom);
     }
 }

 //////////////////////////////////////////////////////////////////////////////

 void GrTextureDomain::GLDomain::sampleTexture(GrGLShaderBuilder* builder,
                                               const GrTextureDomain& textureDomain,
                                               const char* outColor,
                                               const SkString& inCoords,
                                               const GrGLEffect::TextureSampler sampler,
                                               const char* inModulateColor) {
     SkASSERT((Mode)-1 == fMode || textureDomain.mode() == fMode);
     SkDEBUGCODE(fMode = textureDomain.mode();)

     if (kIgnore_Mode == textureDomain.mode()) {
         builder->fsCodeAppendf("\t%s = ", outColor);
         builder->fsAppendTextureLookupAndModulate(inModulateColor, sampler,
                                                     inCoords.c_str());
         builder->fsCodeAppend(";\n");
         return;
     }

     if (!fDomainUni.isValid()) {
         const char* name;
         SkString uniName("TexDom");
         if (textureDomain.fIndex >= 0) {
             uniName.appendS32(textureDomain.fIndex);
         }
         fDomainUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
                                             kVec4f_GrSLType, uniName.c_str(), &name);
         fDomainName = name;
     }
     if (kClamp_Mode == textureDomain.mode()) {
         SkString clampedCoords;
         clampedCoords.appendf("\tclamp(%s, %s.xy, %s.zw)",
                                 inCoords.c_str(), fDomainName.c_str(), fDomainName.c_str());

         builder->fsCodeAppendf("\t%s = ", outColor);
         builder->fsAppendTextureLookupAndModulate(inModulateColor, sampler, clampedCoords.c_str());
         builder->fsCodeAppend(";\n");
     } else {
         SkASSERT(GrTextureDomain::kDecal_Mode == textureDomain.mode());
         // Add a block since we're going to declare variables.
         GrGLShaderBuilder::FSBlock block(builder);

         const char* domain = fDomainName.c_str();
         if (kImagination_GrGLVendor == builder->ctxInfo().vendor()) {
             // On the NexusS and GalaxyNexus, the other path (with the 'any'
             // call) causes the compilation error "Calls to any function that
             // may require a gradient calculation inside a conditional block
             // may return undefined results". This appears to be an issue with
             // the 'any' call since even the simple "result=black; if (any())
             // result=white;" code fails to compile.
             builder->fsCodeAppend("\tvec4 outside = vec4(0.0, 0.0, 0.0, 0.0);\n");
             builder->fsCodeAppend("\tvec4 inside = ");
             builder->fsAppendTextureLookupAndModulate(inModulateColor, sampler, inCoords.c_str());
             builder->fsCodeAppend(";\n");

             builder->fsCodeAppendf("\tfloat x = abs(2.0*(%s.x - %s.x)/(%s.z - %s.x) - 1.0);\n",
                                     inCoords.c_str(), domain, domain, domain);
             builder->fsCodeAppendf("\tfloat y = abs(2.0*(%s.y - %s.y)/(%s.w - %s.y) - 1.0);\n",
                                     inCoords.c_str(), domain, domain, domain);
             builder->fsCodeAppend("\tfloat blend = step(1.0, max(x, y));\n");
             builder->fsCodeAppendf("\t%s = mix(inside, outside, blend);\n", outColor);
         } else {
             builder->fsCodeAppend("\tbvec4 outside;\n");
             builder->fsCodeAppendf("\toutside.xy = lessThan(%s, %s.xy);\n", inCoords.c_str(),
                                    domain);
             builder->fsCodeAppendf("\toutside.zw = greaterThan(%s, %s.zw);\n", inCoords.c_str(),
                                    domain);
             builder->fsCodeAppendf("\t%s = any(outside) ? vec4(0.0, 0.0, 0.0, 0.0) : ", outColor);
             builder->fsAppendTextureLookupAndModulate(inModulateColor, sampler, inCoords.c_str());
             builder->fsCodeAppend(";\n");
         }
     }
 }

 void GrTextureDomain::GLDomain::setData(const GrGLUniformManager& uman,
                                         const GrTextureDomain& textureDomain,
                                         GrSurfaceOrigin textureOrigin) {
     SkASSERT(textureDomain.mode() == fMode);
     if (kIgnore_Mode != textureDomain.mode()) {
         GrGLfloat values[4] = {
             SkScalarToFloat(textureDomain.domain().left()),
             SkScalarToFloat(textureDomain.domain().top()),
             SkScalarToFloat(textureDomain.domain().right()),
             SkScalarToFloat(textureDomain.domain().bottom())
         };
         // vertical flip if necessary
         if (kBottomLeft_GrSurfaceOrigin == textureOrigin) {
             values[1] = 1.0f - values[1];
             values[3] = 1.0f - values[3];
             // The top and bottom were just flipped, so correct the ordering
             // of elements so that values = (l, t, r, b).
             SkTSwap(values[1], values[3]);
         }
         if (0 != memcmp(values, fPrevDomain, 4 * sizeof(GrGLfloat))) {
             uman.set4fv(fDomainUni, 1, values);
             memcpy(fPrevDomain, values, 4 * sizeof(GrGLfloat));
         }
     }
 }


 //////////////////////////////////////////////////////////////////////////////

 class GrGLTextureDomainEffect : public GrGLEffect {
 public:
     GrGLTextureDomainEffect(const GrBackendEffectFactory&, const GrDrawEffect&);

     virtual void emitCode(GrGLShaderBuilder*,
                           const GrDrawEffect&,
                           EffectKey,
                           const char* outputColor,
                           const char* inputColor,
                           const TransformedCoordsArray&,
                           const TextureSamplerArray&) SK_OVERRIDE;

     virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE;

     static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&);

 private:
     GrTextureDomain::GLDomain         fGLDomain;
     typedef GrGLEffect INHERITED;
 };

 GrGLTextureDomainEffect::GrGLTextureDomainEffect(const GrBackendEffectFactory& factory,
                                                  const GrDrawEffect&)
     : INHERITED(factory) {
 }

 void GrGLTextureDomainEffect::emitCode(GrGLShaderBuilder* builder,
                                        const GrDrawEffect& drawEffect,
                                        EffectKey key,
                                        const char* outputColor,
                                        const char* inputColor,
                                        const TransformedCoordsArray& coords,
                                        const TextureSamplerArray& samplers) {
     const GrTextureDomainEffect& effect = drawEffect.castEffect<GrTextureDomainEffect>();
     const GrTextureDomain& domain = effect.textureDomain();

     SkString coords2D = builder->ensureFSCoords2D(coords, 0);
     fGLDomain.sampleTexture(builder, domain, outputColor, coords2D, samplers[0], inputColor);
 }

 void GrGLTextureDomainEffect::setData(const GrGLUniformManager& uman,
                                       const GrDrawEffect& drawEffect) {
     const GrTextureDomainEffect& effect = drawEffect.castEffect<GrTextureDomainEffect>();
     const GrTextureDomain& domain = effect.textureDomain();
     fGLDomain.setData(uman, domain, effect.texture(0)->origin());
 }

 GrGLEffect::EffectKey GrGLTextureDomainEffect::GenKey(const GrDrawEffect& drawEffect,
                                                       const GrGLCaps&) {
     const GrTextureDomain& domain = drawEffect.castEffect<GrTextureDomainEffect>().textureDomain();
     return GrTextureDomain::GLDomain::DomainKey(domain);
 }


 ///////////////////////////////////////////////////////////////////////////////

 GrEffectRef* GrTextureDomainEffect::Create(GrTexture* texture,
                                            const SkMatrix& matrix,
                                            const SkRect& domain,
                                            GrTextureDomain::Mode mode,
                                            GrTextureParams::FilterMode filterMode,
                                            GrCoordSet coordSet) {
     static const SkRect kFullRect = {0, 0, SK_Scalar1, SK_Scalar1};
     if (GrTextureDomain::kIgnore_Mode == mode ||
         (GrTextureDomain::kClamp_Mode == mode && domain.contains(kFullRect))) {
         return GrSimpleTextureEffect::Create(texture, matrix, filterMode);
     } else {

         AutoEffectUnref effect(SkNEW_ARGS(GrTextureDomainEffect, (texture,
                                                                   matrix,
                                                                   domain,
                                                                   mode,
                                                                   filterMode,
                                                                   coordSet)));
         return CreateEffectRef(effect);

     }
 }

 GrTextureDomainEffect::GrTextureDomainEffect(GrTexture* texture,
                                              const SkMatrix& matrix,
                                              const SkRect& domain,
                                              GrTextureDomain::Mode mode,
                                              GrTextureParams::FilterMode filterMode,
                                              GrCoordSet coordSet)
     : GrSingleTextureEffect(texture, matrix, filterMode, coordSet)
     , fTextureDomain(domain, mode) {
 }

 GrTextureDomainEffect::~GrTextureDomainEffect() {

 }

 const GrBackendEffectFactory& GrTextureDomainEffect::getFactory() const {
     return GrTBackendEffectFactory<GrTextureDomainEffect>::getInstance();
 }

 bool GrTextureDomainEffect::onIsEqual(const GrEffect& sBase) const {
     const GrTextureDomainEffect& s = CastEffect<GrTextureDomainEffect>(sBase);
     return this->hasSameTextureParamsMatrixAndSourceCoords(s) &&
            this->fTextureDomain == s.fTextureDomain;
 }

 void GrTextureDomainEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
     if (GrTextureDomain::kDecal_Mode == fTextureDomain.mode()) { // TODO: helper
         *validFlags = 0;
     } else {
         this->updateConstantColorComponentsForModulation(color, validFlags);
     }
 }

 ///////////////////////////////////////////////////////////////////////////////

 GR_DEFINE_EFFECT_TEST(GrTextureDomainEffect);

 GrEffectRef* GrTextureDomainEffect::TestCreate(SkRandom* random,
                                                GrContext*,
                                                const GrDrawTargetCaps&,
                                                GrTexture* textures[]) {
     int texIdx = random->nextBool() ? GrEffectUnitTest::kSkiaPMTextureIdx :
                                       GrEffectUnitTest::kAlphaTextureIdx;
     SkRect domain;
     domain.fLeft = random->nextUScalar1();
     domain.fRight = random->nextRangeScalar(domain.fLeft, SK_Scalar1);
     domain.fTop = random->nextUScalar1();
     domain.fBottom = random->nextRangeScalar(domain.fTop, SK_Scalar1);
     GrTextureDomain::Mode mode =
         (GrTextureDomain::Mode) random->nextULessThan(GrTextureDomain::kModeCount);
     const SkMatrix& matrix = GrEffectUnitTest::TestMatrix(random);
     bool bilerp = random->nextBool();
     GrCoordSet coords = random->nextBool() ? kLocal_GrCoordSet : kPosition_GrCoordSet;
     return GrTextureDomainEffect::Create(textures[texIdx],
                                          matrix,
                                          domain,
                                          mode,
                                          bilerp ? GrTextureParams::kBilerp_FilterMode : GrTextureParams::kNone_FilterMode,
                                          coords);
 }
	/*
	* 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 "GrTextureDomain.h"
	#include "GrSimpleTextureEffect.h"
	#include "GrTBackendEffectFactory.h"
	#include "gl/GrGLEffect.h"
	#include "SkFloatingPoint.h"


	GrTextureDomain::GrTextureDomain(const SkRect& domain, Mode mode, int index)
	: fIndex(index) {

	static const SkRect kFullRect = {0, 0, SK_Scalar1, SK_Scalar1};
	if (domain.contains(kFullRect) && kClamp_Mode == mode) {
	fMode = kIgnore_Mode;
	} else {
	fMode = mode;
	}

	if (fMode != kIgnore_Mode) {
	// We don't currently handle domains that are empty or don't intersect the texture.
	// It is OK if the domain rect is a line or point, but it should not be inverted. We do not
	// handle rects that do not intersect the [0..1]x[0..1] rect.
	SkASSERT(domain.fLeft <= domain.fRight);
	SkASSERT(domain.fTop <= domain.fBottom);
	fDomain.fLeft = SkMaxScalar(domain.fLeft, kFullRect.fLeft);
	fDomain.fRight = SkMinScalar(domain.fRight, kFullRect.fRight);
	fDomain.fTop = SkMaxScalar(domain.fTop, kFullRect.fTop);
	fDomain.fBottom = SkMinScalar(domain.fBottom, kFullRect.fBottom);
	SkASSERT(fDomain.fLeft <= fDomain.fRight);
	SkASSERT(fDomain.fTop <= fDomain.fBottom);
	}
	}

	//////////////////////////////////////////////////////////////////////////////

	void GrTextureDomain::GLDomain::sampleTexture(GrGLShaderBuilder* builder,
	const GrTextureDomain& textureDomain,
	const char* outColor,
	const SkString& inCoords,
	const GrGLEffect::TextureSampler sampler,
	const char* inModulateColor) {
	SkASSERT((Mode)-1 == fMode \|\| textureDomain.mode() == fMode);
	SkDEBUGCODE(fMode = textureDomain.mode();)

	if (kIgnore_Mode == textureDomain.mode()) {
	builder->fsCodeAppendf("\t%s = ", outColor);
	builder->fsAppendTextureLookupAndModulate(inModulateColor, sampler,
	inCoords.c_str());
	builder->fsCodeAppend(";\n");
	return;
	}

	if (!fDomainUni.isValid()) {
	const char* name;
	SkString uniName("TexDom");
	if (textureDomain.fIndex >= 0) {
	uniName.appendS32(textureDomain.fIndex);
	}
	fDomainUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
	kVec4f_GrSLType, uniName.c_str(), &name);
	fDomainName = name;
	}
	if (kClamp_Mode == textureDomain.mode()) {
	SkString clampedCoords;
	clampedCoords.appendf("\tclamp(%s, %s.xy, %s.zw)",
	inCoords.c_str(), fDomainName.c_str(), fDomainName.c_str());

	builder->fsCodeAppendf("\t%s = ", outColor);
	builder->fsAppendTextureLookupAndModulate(inModulateColor, sampler, clampedCoords.c_str());
	builder->fsCodeAppend(";\n");
	} else {
	SkASSERT(GrTextureDomain::kDecal_Mode == textureDomain.mode());
	// Add a block since we're going to declare variables.
	GrGLShaderBuilder::FSBlock block(builder);

	const char* domain = fDomainName.c_str();
	if (kImagination_GrGLVendor == builder->ctxInfo().vendor()) {
	// On the NexusS and GalaxyNexus, the other path (with the 'any'
	// call) causes the compilation error "Calls to any function that
	// may require a gradient calculation inside a conditional block
	// may return undefined results". This appears to be an issue with
	// the 'any' call since even the simple "result=black; if (any())
	// result=white;" code fails to compile.
	builder->fsCodeAppend("\tvec4 outside = vec4(0.0, 0.0, 0.0, 0.0);\n");
	builder->fsCodeAppend("\tvec4 inside = ");
	builder->fsAppendTextureLookupAndModulate(inModulateColor, sampler, inCoords.c_str());
	builder->fsCodeAppend(";\n");

	builder->fsCodeAppendf("\tfloat x = abs(2.0*(%s.x - %s.x)/(%s.z - %s.x) - 1.0);\n",
	inCoords.c_str(), domain, domain, domain);
	builder->fsCodeAppendf("\tfloat y = abs(2.0*(%s.y - %s.y)/(%s.w - %s.y) - 1.0);\n",
	inCoords.c_str(), domain, domain, domain);
	builder->fsCodeAppend("\tfloat blend = step(1.0, max(x, y));\n");
	builder->fsCodeAppendf("\t%s = mix(inside, outside, blend);\n", outColor);
	} else {
	builder->fsCodeAppend("\tbvec4 outside;\n");
	builder->fsCodeAppendf("\toutside.xy = lessThan(%s, %s.xy);\n", inCoords.c_str(),
	domain);
	builder->fsCodeAppendf("\toutside.zw = greaterThan(%s, %s.zw);\n", inCoords.c_str(),
	domain);
	builder->fsCodeAppendf("\t%s = any(outside) ? vec4(0.0, 0.0, 0.0, 0.0) : ", outColor);
	builder->fsAppendTextureLookupAndModulate(inModulateColor, sampler, inCoords.c_str());
	builder->fsCodeAppend(";\n");
	}
	}
	}

	void GrTextureDomain::GLDomain::setData(const GrGLUniformManager& uman,
	const GrTextureDomain& textureDomain,
	GrSurfaceOrigin textureOrigin) {
	SkASSERT(textureDomain.mode() == fMode);
	if (kIgnore_Mode != textureDomain.mode()) {
	GrGLfloat values[4] = {
	SkScalarToFloat(textureDomain.domain().left()),
	SkScalarToFloat(textureDomain.domain().top()),
	SkScalarToFloat(textureDomain.domain().right()),
	SkScalarToFloat(textureDomain.domain().bottom())
	};
	// vertical flip if necessary
	if (kBottomLeft_GrSurfaceOrigin == textureOrigin) {
	values[1] = 1.0f - values[1];
	values[3] = 1.0f - values[3];
	// The top and bottom were just flipped, so correct the ordering
	// of elements so that values = (l, t, r, b).
	SkTSwap(values[1], values[3]);
	}
	if (0 != memcmp(values, fPrevDomain, 4 * sizeof(GrGLfloat))) {
	uman.set4fv(fDomainUni, 1, values);
	memcpy(fPrevDomain, values, 4 * sizeof(GrGLfloat));
	}
	}
	}


	//////////////////////////////////////////////////////////////////////////////

	class GrGLTextureDomainEffect : public GrGLEffect {
	public:
	GrGLTextureDomainEffect(const GrBackendEffectFactory&, const GrDrawEffect&);

	virtual void emitCode(GrGLShaderBuilder*,
	const GrDrawEffect&,
	EffectKey,
	const char* outputColor,
	const char* inputColor,
	const TransformedCoordsArray&,
	const TextureSamplerArray&) SK_OVERRIDE;

	virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE;

	static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&);

	private:
	GrTextureDomain::GLDomain fGLDomain;
	typedef GrGLEffect INHERITED;
	};

	GrGLTextureDomainEffect::GrGLTextureDomainEffect(const GrBackendEffectFactory& factory,
	const GrDrawEffect&)
	: INHERITED(factory) {
	}

	void GrGLTextureDomainEffect::emitCode(GrGLShaderBuilder* builder,
	const GrDrawEffect& drawEffect,
	EffectKey key,
	const char* outputColor,
	const char* inputColor,
	const TransformedCoordsArray& coords,
	const TextureSamplerArray& samplers) {
	const GrTextureDomainEffect& effect = drawEffect.castEffect<GrTextureDomainEffect>();
	const GrTextureDomain& domain = effect.textureDomain();

	SkString coords2D = builder->ensureFSCoords2D(coords, 0);
	fGLDomain.sampleTexture(builder, domain, outputColor, coords2D, samplers[0], inputColor);
	}

	void GrGLTextureDomainEffect::setData(const GrGLUniformManager& uman,
	const GrDrawEffect& drawEffect) {
	const GrTextureDomainEffect& effect = drawEffect.castEffect<GrTextureDomainEffect>();
	const GrTextureDomain& domain = effect.textureDomain();
	fGLDomain.setData(uman, domain, effect.texture(0)->origin());
	}

	GrGLEffect::EffectKey GrGLTextureDomainEffect::GenKey(const GrDrawEffect& drawEffect,
	const GrGLCaps&) {
	const GrTextureDomain& domain = drawEffect.castEffect<GrTextureDomainEffect>().textureDomain();
	return GrTextureDomain::GLDomain::DomainKey(domain);
	}


	///////////////////////////////////////////////////////////////////////////////

	GrEffectRef* GrTextureDomainEffect::Create(GrTexture* texture,
	const SkMatrix& matrix,
	const SkRect& domain,
	GrTextureDomain::Mode mode,
	GrTextureParams::FilterMode filterMode,
	GrCoordSet coordSet) {
	static const SkRect kFullRect = {0, 0, SK_Scalar1, SK_Scalar1};
	if (GrTextureDomain::kIgnore_Mode == mode \|\|
	(GrTextureDomain::kClamp_Mode == mode && domain.contains(kFullRect))) {
	return GrSimpleTextureEffect::Create(texture, matrix, filterMode);
	} else {

	AutoEffectUnref effect(SkNEW_ARGS(GrTextureDomainEffect, (texture,
	matrix,
	domain,
	mode,
	filterMode,
	coordSet)));
	return CreateEffectRef(effect);

	}
	}

	GrTextureDomainEffect::GrTextureDomainEffect(GrTexture* texture,
	const SkMatrix& matrix,
	const SkRect& domain,
	GrTextureDomain::Mode mode,
	GrTextureParams::FilterMode filterMode,
	GrCoordSet coordSet)
	: GrSingleTextureEffect(texture, matrix, filterMode, coordSet)
	, fTextureDomain(domain, mode) {
	}

	GrTextureDomainEffect::~GrTextureDomainEffect() {

	}

	const GrBackendEffectFactory& GrTextureDomainEffect::getFactory() const {
	return GrTBackendEffectFactory<GrTextureDomainEffect>::getInstance();
	}

	bool GrTextureDomainEffect::onIsEqual(const GrEffect& sBase) const {
	const GrTextureDomainEffect& s = CastEffect<GrTextureDomainEffect>(sBase);
	return this->hasSameTextureParamsMatrixAndSourceCoords(s) &&
	this->fTextureDomain == s.fTextureDomain;
	}

	void GrTextureDomainEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
	if (GrTextureDomain::kDecal_Mode == fTextureDomain.mode()) { // TODO: helper
	*validFlags = 0;
	} else {
	this->updateConstantColorComponentsForModulation(color, validFlags);
	}
	}

	///////////////////////////////////////////////////////////////////////////////

	GR_DEFINE_EFFECT_TEST(GrTextureDomainEffect);

	GrEffectRef* GrTextureDomainEffect::TestCreate(SkRandom* random,
	GrContext*,
	const GrDrawTargetCaps&,
	GrTexture* textures[]) {
	int texIdx = random->nextBool() ? GrEffectUnitTest::kSkiaPMTextureIdx :
	GrEffectUnitTest::kAlphaTextureIdx;
	SkRect domain;
	domain.fLeft = random->nextUScalar1();
	domain.fRight = random->nextRangeScalar(domain.fLeft, SK_Scalar1);
	domain.fTop = random->nextUScalar1();
	domain.fBottom = random->nextRangeScalar(domain.fTop, SK_Scalar1);
	GrTextureDomain::Mode mode =
	(GrTextureDomain::Mode) random->nextULessThan(GrTextureDomain::kModeCount);
	const SkMatrix& matrix = GrEffectUnitTest::TestMatrix(random);
	bool bilerp = random->nextBool();
	GrCoordSet coords = random->nextBool() ? kLocal_GrCoordSet : kPosition_GrCoordSet;
	return GrTextureDomainEffect::Create(textures[texIdx],
	matrix,
	domain,
	mode,
	bilerp ? GrTextureParams::kBilerp_FilterMode : GrTextureParams::kNone_FilterMode,
	coords);
	}