remove avoid and pixelxor xfermodes

src/effects/SkPixelXorXfermode.cpp

Index: src/effects/SkPixelXorXfermode.cpp
diff --git a/src/effects/SkPixelXorXfermode.cpp b/src/effects/SkPixelXorXfermode.cpp
deleted file mode 100644
index d8861e6df111c37fef44e67719c23cc766380a69..0000000000000000000000000000000000000000
--- a/src/effects/SkPixelXorXfermode.cpp
+++ /dev/null
@@ -1,380 +0,0 @@
-/*
- * Copyright 2011 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "SkPixelXorXfermode.h"
-#include "SkColorPriv.h"
-#include "SkReadBuffer.h"
-#include "SkWriteBuffer.h"
-#include "SkString.h"
-
-// we always return an opaque color, 'cause I don't know what to do with
-// the alpha-component and still return a valid premultiplied color.
-SkPMColor SkPixelXorXfermode::xferColor(SkPMColor src, SkPMColor dst) const {
-    SkPMColor res = src ^ dst ^ fOpColor;
-
-    res |= (SK_A32_MASK << SK_A32_SHIFT);   // force it to be opaque
-    return res;
-}
-
-void SkPixelXorXfermode::flatten(SkWriteBuffer& wb) const {
-    wb.writeColor(SkColorSetRGB(SkGetPackedR32(fOpColor),
-                                SkGetPackedG32(fOpColor),
-                                SkGetPackedB32(fOpColor)));
-}
-
-sk_sp<SkFlattenable> SkPixelXorXfermode::CreateProc(SkReadBuffer& buffer) {
-    return Make(buffer.readColor());
-}
-
-#ifndef SK_IGNORE_TO_STRING
-void SkPixelXorXfermode::toString(SkString* str) const {
-    str->append("SkPixelXorXfermode: ");
-    str->appendHex(fOpColor);
-}
-#endif
-
-#if SK_SUPPORT_GPU
-#include "GrFragmentProcessor.h"
-#include "GrInvariantOutput.h"
-#include "GrXferProcessor.h"
-
-#include "glsl/GrGLSLFragmentProcessor.h"
-#include "glsl/GrGLSLFragmentShaderBuilder.h"
-#include "glsl/GrGLSLProgramDataManager.h"
-#include "glsl/GrGLSLUniformHandler.h"
-#include "glsl/GrGLSLXferProcessor.h"
-
-///////////////////////////////////////////////////////////////////////////////
-// Fragment Processor
-///////////////////////////////////////////////////////////////////////////////
-
-static void add_pixelxor_code(GrGLSLFragmentBuilder* fragBuilder,
-                              const char* srcColor,
-                              const char* dstColor,
-                              const char* outputColor,
-                              const char* opColor) {
-    static const GrGLSLShaderVar gXorArgs[] = {
-        GrGLSLShaderVar("f1", kFloat_GrSLType),
-        GrGLSLShaderVar("f2", kFloat_GrSLType),
-        GrGLSLShaderVar("f3", kFloat_GrSLType),
-        GrGLSLShaderVar("fPowerOf2Divisor", kFloat_GrSLType),
-    };
-    SkString xorFuncName;
-
-    // The xor function checks if the three passed in floats (f1, f2, f3) would
-    // have a bit in the log2(fPowerOf2Divisor)-th position if they were
-    // represented by an int. It then performs an xor of the 3 bits (using
-    // the property that serial xors can be treated as a sum of 0s & 1s mod 2).
-    fragBuilder->emitFunction(kFloat_GrSLType,
-                              "xor",
-                              SK_ARRAY_COUNT(gXorArgs),
-                              gXorArgs,
-                              "float bit1 = floor(f1 / fPowerOf2Divisor);"
-                              "float bit2 = floor(f2 / fPowerOf2Divisor);"
-                              "float bit3 = floor(f3 / fPowerOf2Divisor);"
-                              "return mod(bit1 + bit2 + bit3, 2.0);",
-                              &xorFuncName);
-
-    fragBuilder->codeAppend("float red = 0.0, green = 0.0, blue = 0.0;");
-
-    if (srcColor) {
-        fragBuilder->codeAppendf("vec3 src = 255.99 * %s.rgb;", srcColor);
-    } else {
-        fragBuilder->codeAppendf("vec3 src = vec3(255.99);");
-    }
-    fragBuilder->codeAppendf("vec3 dst = 255.99 * %s.rgb;", dstColor);
-    fragBuilder->codeAppendf("vec3 op  = 255.99 * %s;", opColor);
-
-    fragBuilder->codeAppend("float modValue = 128.0;");
-
-    fragBuilder->codeAppend("for (int i = 0; i < 8; i++) {");
-
-    fragBuilder->codeAppendf("float bit = %s(src.r, dst.r, op.r, modValue);", xorFuncName.c_str());
-    fragBuilder->codeAppend("red += modValue * bit;");
-    fragBuilder->codeAppend("src.r = mod(src.r, modValue);");
-    fragBuilder->codeAppend("dst.r = mod(dst.r, modValue);");
-    fragBuilder->codeAppend("op.r = mod(op.r, modValue);");
-
-    fragBuilder->codeAppendf("bit = %s(src.g, dst.g, op.g, modValue);", xorFuncName.c_str());
-    fragBuilder->codeAppend("green += modValue * bit;");
-    fragBuilder->codeAppend("src.g = mod(src.g, modValue);");
-    fragBuilder->codeAppend("dst.g = mod(dst.g, modValue);");
-    fragBuilder->codeAppend("op.g = mod(op.g, modValue);");
-
-    fragBuilder->codeAppendf("bit = %s(src.b, dst.b, op.b, modValue);", xorFuncName.c_str());
-    fragBuilder->codeAppend("blue += modValue * bit;");
-    fragBuilder->codeAppend("src.b = mod(src.b, modValue);");
-    fragBuilder->codeAppend("dst.b = mod(dst.b, modValue);");
-    fragBuilder->codeAppend("op.b = mod(op.b, modValue);");
-
-    fragBuilder->codeAppend("modValue /= 2.0;");
-
-    fragBuilder->codeAppend("}");
-
-    fragBuilder->codeAppendf("%s = vec4(red/255.0, green/255.0, blue/255.0, 1.0);", outputColor);
-}
-
-class GLPixelXorFP;
-
-class PixelXorFP : public GrFragmentProcessor {
-public:
-    static const GrFragmentProcessor* Create(SkPMColor opColor, const GrFragmentProcessor* dst) {
-        return new PixelXorFP(opColor, dst);
-    }
-
-    ~PixelXorFP() override {};
-
-    const char* name() const override { return "PixelXor"; }
-
-    SkString dumpInfo() const override {
-        SkString str;
-        str.appendf("Color: 0x%08x", fOpColor);
-        return str;
-    }
-
-    SkPMColor opColor() const { return fOpColor; }
-
-private:
-    GrGLSLFragmentProcessor* onCreateGLSLInstance() const override;
-
-    void onGetGLSLProcessorKey(const GrGLSLCaps& caps, GrProcessorKeyBuilder* b) const override;
-
-    bool onIsEqual(const GrFragmentProcessor& fpBase) const override {
-        const PixelXorFP& fp = fpBase.cast<PixelXorFP>();
-        return fOpColor == fp.fOpColor;
-    }
-
-    void onComputeInvariantOutput(GrInvariantOutput* inout) const override {
-        inout->setToUnknown(GrInvariantOutput::kWill_ReadInput);
-    }
-
-    PixelXorFP(SkPMColor opColor, const GrFragmentProcessor* dst)
-        : fOpColor(opColor) {
-        this->initClassID<PixelXorFP>();
-
-        SkASSERT(dst);
-        SkDEBUGCODE(int dstIndex = )this->registerChildProcessor(dst);
-        SkASSERT(0 == dstIndex);
-    }
-
-    SkPMColor fOpColor;
-
-    GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
-    typedef GrFragmentProcessor INHERITED;
-};
-
-///////////////////////////////////////////////////////////////////////////////
-
-class GLPixelXorFP : public GrGLSLFragmentProcessor {
-public:
-    void emitCode(EmitArgs& args) override {
-        GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
-        SkString dstColor("dstColor");
-        this->emitChild(0, nullptr, &dstColor, args);
-
-        fOpColorUni = args.fUniformHandler->addUniform(kFragment_GrShaderFlag,
-                                                       kVec3f_GrSLType, kHigh_GrSLPrecision,
-                                                       "opColor");
-        const char* kOpColorUni = args.fUniformHandler->getUniformCStr(fOpColorUni);
-
-        add_pixelxor_code(fragBuilder, args.fInputColor, dstColor.c_str(),
-                          args.fOutputColor, kOpColorUni);
-    }
-
-    static void GenKey(const GrProcessor&, const GrGLSLCaps&, GrProcessorKeyBuilder*) { }
-
-protected:
-    void onSetData(const GrGLSLProgramDataManager& pdman, const GrProcessor& proc) override {
-        const PixelXorFP& pixXor = proc.cast<PixelXorFP>();
-        pdman.set3f(fOpColorUni,
-                    SkGetPackedR32(pixXor.opColor())/255.0f,
-                    SkGetPackedG32(pixXor.opColor())/255.0f,
-                    SkGetPackedB32(pixXor.opColor())/255.0f);
-    }
-
-private:
-    GrGLSLProgramDataManager::UniformHandle fOpColorUni;
-
-    typedef GrGLSLFragmentProcessor INHERITED;
-};
-
-///////////////////////////////////////////////////////////////////////////////
-
-GrGLSLFragmentProcessor* PixelXorFP::onCreateGLSLInstance() const {
-    return new GLPixelXorFP;
-}
-
-void PixelXorFP::onGetGLSLProcessorKey(const GrGLSLCaps& caps, GrProcessorKeyBuilder* b) const {
-    GLPixelXorFP::GenKey(*this, caps, b);
-}
-
-const GrFragmentProcessor* PixelXorFP::TestCreate(GrProcessorTestData* d) {
-    SkColor color = d->fRandom->nextU();
-
-    SkAutoTUnref<const GrFragmentProcessor> dst(GrProcessorUnitTest::CreateChildFP(d));
-    return new PixelXorFP(SkPreMultiplyColor(color), dst);
-}
-
-GR_DEFINE_FRAGMENT_PROCESSOR_TEST(PixelXorFP);
-
-///////////////////////////////////////////////////////////////////////////////
-// Xfer Processor
-///////////////////////////////////////////////////////////////////////////////
-
-class PixelXorXP : public GrXferProcessor {
-public:
-    PixelXorXP(const DstTexture* dstTexture, bool hasMixedSamples, SkPMColor opColor)
-        : INHERITED(dstTexture, true, hasMixedSamples)
-        , fOpColor(opColor) {
-        this->initClassID<PixelXorXP>();
-    }
-
-    const char* name() const override { return "PixelXor"; }
-
-    GrGLSLXferProcessor* createGLSLInstance() const override;
-
-    SkPMColor opColor() const { return fOpColor; }
-
-private:
-    GrXferProcessor::OptFlags onGetOptimizations(const GrPipelineOptimizations& optimizations,
-                                                 bool doesStencilWrite,
-                                                 GrColor* overrideColor,
-                                                 const GrCaps& caps) const override {
-        return GrXferProcessor::kNone_OptFlags;
-    }
-
-    void onGetGLSLProcessorKey(const GrGLSLCaps& caps, GrProcessorKeyBuilder* b) const override;
-
-    bool onIsEqual(const GrXferProcessor& xpBase) const override {
-        const PixelXorXP& xp = xpBase.cast<PixelXorXP>();
-
-        return fOpColor == xp.fOpColor;
-    }
-
-    SkPMColor fOpColor;
-
-    typedef GrXferProcessor INHERITED;
-};
-
-///////////////////////////////////////////////////////////////////////////////
-
-class GLPixelXorXP : public GrGLSLXferProcessor {
-public:
-    GLPixelXorXP(const PixelXorXP& pixelXorXP) { }
-
-    ~GLPixelXorXP() override {}
-
-    static void GenKey(const GrProcessor&, const GrGLSLCaps&, GrProcessorKeyBuilder*) { }
-
-private:
-    void emitBlendCodeForDstRead(GrGLSLXPFragmentBuilder* fragBuilder,
-                                 GrGLSLUniformHandler* uniformHandler,
-                                 const char* srcColor,
-                                 const char* srcCoverage,
-                                 const char* dstColor,
-                                 const char* outColor,
-                                 const char* outColorSecondary,
-                                 const GrXferProcessor& proc) override {
-        fOpColorUni = uniformHandler->addUniform(kFragment_GrShaderFlag,
-                                                 kVec3f_GrSLType, kHigh_GrSLPrecision,
-                                                 "opColor");
-        const char* kOpColorUni = uniformHandler->getUniformCStr(fOpColorUni);
-
-        add_pixelxor_code(fragBuilder, srcColor, dstColor, outColor, kOpColorUni);
-
-        // Apply coverage.
-        INHERITED::DefaultCoverageModulation(fragBuilder, srcCoverage, dstColor, outColor,
-                                             outColorSecondary, proc);
-    }
-
-    void onSetData(const GrGLSLProgramDataManager& pdman,
-                   const GrXferProcessor& processor) override {
-        const PixelXorXP& pixelXor = processor.cast<PixelXorXP>();
-        pdman.set3f(fOpColorUni,
-                    SkGetPackedR32(pixelXor.opColor())/255.0f,
-                    SkGetPackedG32(pixelXor.opColor())/255.0f,
-                    SkGetPackedB32(pixelXor.opColor())/255.0f);
-    };
-
-    GrGLSLProgramDataManager::UniformHandle fOpColorUni;
-
-    typedef GrGLSLXferProcessor INHERITED;
-};
-
-///////////////////////////////////////////////////////////////////////////////
-
-void PixelXorXP::onGetGLSLProcessorKey(const GrGLSLCaps& caps, GrProcessorKeyBuilder* b) const {
-    GLPixelXorXP::GenKey(*this, caps, b);
-}
-
-GrGLSLXferProcessor* PixelXorXP::createGLSLInstance() const { return new GLPixelXorXP(*this); }
-
-///////////////////////////////////////////////////////////////////////////////
-
-class GrPixelXorXPFactory : public GrXPFactory {
-public:
-    static GrXPFactory* Create(SkPMColor opColor) {
-        return new GrPixelXorXPFactory(opColor);
-    }
-
-    void getInvariantBlendedColor(const GrProcOptInfo& colorPOI,
-                                  GrXPFactory::InvariantBlendedColor* blendedColor) const override {
-        blendedColor->fWillBlendWithDst = true;
-        blendedColor->fKnownColorFlags = kNone_GrColorComponentFlags;
-    }
-
-private:
-    GrPixelXorXPFactory(SkPMColor opColor)
-        : fOpColor(opColor) {
-        this->initClassID<GrPixelXorXPFactory>();
-    }
-
-    GrXferProcessor* onCreateXferProcessor(const GrCaps& caps,
-                                           const GrPipelineOptimizations& optimizations,
-                                           bool hasMixedSamples,
-                                           const DstTexture* dstTexture) const override {
-        return new PixelXorXP(dstTexture, hasMixedSamples, fOpColor);
-    }
-
-    bool onWillReadDstColor(const GrCaps& caps,
-                            const GrPipelineOptimizations& optimizations,
-                            bool hasMixedSamples) const override {
-        return true;
-    }
-
-    bool onIsEqual(const GrXPFactory& xpfBase) const override {
-        const GrPixelXorXPFactory& xpf = xpfBase.cast<GrPixelXorXPFactory>();
-        return fOpColor == xpf.fOpColor;
-    }
-
-    GR_DECLARE_XP_FACTORY_TEST;
-
-    SkPMColor fOpColor;
-
-    typedef GrXPFactory INHERITED;
-};
-
-GR_DEFINE_XP_FACTORY_TEST(GrPixelXorXPFactory);
-
-const GrXPFactory* GrPixelXorXPFactory::TestCreate(GrProcessorTestData* d) {
-    SkColor color = d->fRandom->nextU();
-
-    return GrPixelXorXPFactory::Create(SkPreMultiplyColor(color));
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-const GrFragmentProcessor* SkPixelXorXfermode::getFragmentProcessorForImageFilter(
-                                                        const GrFragmentProcessor* dst) const {
-    return PixelXorFP::Create(fOpColor, dst);
-}
-
-GrXPFactory* SkPixelXorXfermode::asXPFactory() const {
-    return GrPixelXorXPFactory::Create(fOpColor);
-}
-
-#endif