/*
 * Copyright 2015 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "SkXfermode.h"
#include "Test.h"

#if SK_SUPPORT_GPU

#include "GrContextFactory.h"
#include "GrContextOptions.h"
#include "GrGpu.h"
#include "GrResourceProvider.h"
#include "GrXferProcessor.h"
#include "batches/GrVertexBatch.h"
#include "effects/GrPorterDuffXferProcessor.h"
#include "gl/GrGLCaps.h"

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

static void test_color_unknown_with_coverage(skiatest::Reporter* reporter, const GrCaps& caps);
static void test_color_unknown_no_coverage(skiatest::Reporter* reporter, const GrCaps& caps);
static void test_color_opaque_with_coverage(skiatest::Reporter* reporter, const GrCaps& caps);
static void test_color_opaque_no_coverage(skiatest::Reporter* reporter, const GrCaps& caps);
static void test_lcd_coverage(skiatest::Reporter* reporter, const GrCaps& caps);
static void test_lcd_coverage_fallback_case(skiatest::Reporter* reporter, const GrCaps& caps);

DEF_GPUTEST_FOR_NULLGL_CONTEXT(GrPorterDuff, reporter, ctxInfo) {
    const GrCaps& caps = *ctxInfo.grContext()->getGpu()->caps();
    if (!caps.shaderCaps()->dualSourceBlendingSupport()) {
        SkFAIL("Null context does not support dual source blending.");
        return;
    }

    test_color_unknown_with_coverage(reporter, caps);
    test_color_unknown_no_coverage(reporter, caps);
    test_color_opaque_with_coverage(reporter, caps);
    test_color_opaque_no_coverage(reporter, caps);
    test_lcd_coverage(reporter, caps);
    test_lcd_coverage_fallback_case(reporter, caps);
}

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

#define TEST_ASSERT(...) REPORTER_ASSERT(reporter, __VA_ARGS__)

enum {
    kNone_OutputType,
    kCoverage_OutputType,
    kModulate_OutputType,
    kSAModulate_OutputType,
    kISAModulate_OutputType,
    kISCModulate_OutputType
};

enum {
    kNone_OptFlags                    = GrXferProcessor::kNone_OptFlags,
    kSkipDraw_OptFlag                 = GrXferProcessor::kSkipDraw_OptFlag,
    kIgnoreColor_OptFlag              = GrXferProcessor::kIgnoreColor_OptFlag,
    kIgnoreCoverage_OptFlag           = GrXferProcessor::kIgnoreCoverage_OptFlag,
    kCanTweakAlphaForCoverage_OptFlag = GrXferProcessor::kCanTweakAlphaForCoverage_OptFlag
};

class GrPorterDuffTest {
public:
    struct XPInfo {
        XPInfo(skiatest::Reporter* reporter, SkBlendMode xfermode, const GrCaps& caps,
               const GrPipelineOptimizations& optimizations) {
            sk_sp<GrXPFactory> xpf(GrPorterDuffXPFactory::Make(xfermode));
            sk_sp<GrXferProcessor> xp(
                xpf->createXferProcessor(optimizations, false, nullptr, caps));
            TEST_ASSERT(!xpf->willNeedDstTexture(caps, optimizations));
            xpf->getInvariantBlendedColor(optimizations.fColorPOI, &fBlendedColor);
            fOptFlags = xp->getOptimizations(optimizations, false, nullptr, caps);
            GetXPOutputTypes(xp.get(), &fPrimaryOutputType, &fSecondaryOutputType);
            xp->getBlendInfo(&fBlendInfo);
            TEST_ASSERT(!xp->willReadDstColor());
            TEST_ASSERT(xp->hasSecondaryOutput() == GrBlendCoeffRefsSrc2(fBlendInfo.fDstBlend));
        }

        GrXPFactory::InvariantBlendedColor fBlendedColor;
        int fOptFlags;
        int fPrimaryOutputType;
        int fSecondaryOutputType;
        GrXferProcessor::BlendInfo fBlendInfo;
    };

    static void GetXPOutputTypes(const GrXferProcessor* xp, int* outPrimary, int* outSecondary) {
        GrPorterDuffXPFactory::TestGetXPOutputTypes(xp, outPrimary, outSecondary);
    }
};

static void test_lcd_coverage(skiatest::Reporter* reporter, const GrCaps& caps) {
    GrPipelineOptimizations opt;
    opt.fColorPOI.calcWithInitialValues(NULL, 0, 0, kNone_GrColorComponentFlags, false);
    // Setting 2nd to last value to false and last to true will force covPOI to LCD coverage.
    opt.fCoveragePOI.calcWithInitialValues(NULL, 0, 0, kNone_GrColorComponentFlags, false, true);

    SkASSERT(!opt.fColorPOI.isOpaque());
    SkASSERT(!opt.fColorPOI.isSolidWhite());
    SkASSERT(!opt.fCoveragePOI.isSolidWhite());
    SkASSERT(opt.fCoveragePOI.isFourChannelOutput());

    for (int m = 0; m <= (int)SkBlendMode::kLastCoeffMode; m++) {
        SkBlendMode xfermode = static_cast<SkBlendMode>(m);
        const GrPorterDuffTest::XPInfo xpi(reporter, xfermode, caps, opt);

        switch (xfermode) {
            case SkBlendMode::kClear:
                TEST_ASSERT(!xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(0 == xpi.fBlendedColor.fKnownColor);
                TEST_ASSERT(kRGBA_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreColor_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kCoverage_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kReverseSubtract_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kDC_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrc:
                TEST_ASSERT(!xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kNone_OptFlags) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kCoverage_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kIS2C_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDst:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kSkipDraw_OptFlag |
                             kIgnoreColor_OptFlag |
                             kIgnoreCoverage_OptFlag |
                             kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kNone_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(!xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrcOver:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kNone_OptFlags) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kSAModulate_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kIS2C_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDstOver:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kNone_OptFlags) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kIDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrcIn:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kNone_OptFlags) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kCoverage_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kIS2C_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDstIn:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kNone_OptFlags) == xpi.fOptFlags);
                TEST_ASSERT(kISAModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kReverseSubtract_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kDC_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrcOut:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kNone_OptFlags) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kCoverage_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kIDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kIS2C_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDstOut:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kNone_OptFlags) == xpi.fOptFlags);
                TEST_ASSERT(kSAModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kISC_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrcATop:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kNone_OptFlags) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kSAModulate_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kIS2C_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDstATop:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kNone_OptFlags) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kISAModulate_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kIDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kIS2C_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kXor:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kNone_OptFlags) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kSAModulate_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kIDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kIS2C_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kPlus:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kNone_OptFlags) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kModulate:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kNone_OptFlags) == xpi.fOptFlags);
                TEST_ASSERT(kISCModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kReverseSubtract_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kDC_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kScreen:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kNone_OptFlags) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kISC_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            default:
                ERRORF(reporter, "Invalid xfermode.");
                break;
        }
    }
}
static void test_color_unknown_with_coverage(skiatest::Reporter* reporter, const GrCaps& caps) {
    GrPipelineOptimizations optimizations;
    optimizations.fColorPOI.calcWithInitialValues(nullptr, 0, 0, kNone_GrColorComponentFlags,
                                                  false);
    optimizations.fCoveragePOI.calcWithInitialValues(nullptr, 0, 0, kNone_GrColorComponentFlags,
                                                     true);

    SkASSERT(!optimizations.fColorPOI.isOpaque());
    SkASSERT(!optimizations.fColorPOI.isSolidWhite());
    SkASSERT(!optimizations.fCoveragePOI.isSolidWhite());
    SkASSERT(!optimizations.fCoveragePOI.isFourChannelOutput());

    for (int m = 0; m <= (int)SkBlendMode::kLastCoeffMode; m++) {
        SkBlendMode xfermode = static_cast<SkBlendMode>(m);
        const GrPorterDuffTest::XPInfo xpi(reporter, xfermode, caps, optimizations);


        switch (xfermode) {
            case SkBlendMode::kClear:
                TEST_ASSERT(!xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(0 == xpi.fBlendedColor.fKnownColor);
                TEST_ASSERT(kRGBA_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreColor_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kCoverage_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kReverseSubtract_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kDC_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrc:
                TEST_ASSERT(!xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kNone_OptFlags) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kCoverage_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kIS2A_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDst:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kSkipDraw_OptFlag |
                             kIgnoreColor_OptFlag |
                             kIgnoreCoverage_OptFlag |
                             kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kNone_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(!xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrcOver:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kISA_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDstOver:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kIDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrcIn:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kNone_OptFlags) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kCoverage_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kIS2A_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDstIn:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kNone_OptFlags) == xpi.fOptFlags);
                TEST_ASSERT(kISAModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kReverseSubtract_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kDC_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrcOut:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kNone_OptFlags) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kCoverage_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kIDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kIS2A_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDstOut:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kISA_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrcATop:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kISA_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDstATop:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kNone_OptFlags) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kISAModulate_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kIDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kIS2C_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kXor:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kIDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kISA_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kPlus:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kModulate:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kNone_OptFlags) == xpi.fOptFlags);
                TEST_ASSERT(kISCModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kReverseSubtract_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kDC_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kScreen:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kISC_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            default:
                ERRORF(reporter, "Invalid xfermode.");
                break;
        }
    }
}

static void test_color_unknown_no_coverage(skiatest::Reporter* reporter, const GrCaps& caps) {
    GrPipelineOptimizations optimizations;
    optimizations.fColorPOI.calcWithInitialValues(nullptr, 0, GrColorPackRGBA(229, 0, 154, 0),
                                   kR_GrColorComponentFlag | kB_GrColorComponentFlag, false);
    optimizations.fCoveragePOI.calcWithInitialValues(nullptr, 0, GrColorPackA4(255),
                                                     kRGBA_GrColorComponentFlags, true);

    SkASSERT(!optimizations.fColorPOI.isOpaque());
    SkASSERT(!optimizations.fColorPOI.isSolidWhite());
    SkASSERT(optimizations.fCoveragePOI.isSolidWhite());
    SkASSERT(!optimizations.fCoveragePOI.isFourChannelOutput());

    for (int m = 0; m <= (int)SkBlendMode::kLastCoeffMode; m++) {
        SkBlendMode xfermode = static_cast<SkBlendMode>(m);
        const GrPorterDuffTest::XPInfo xpi(reporter, xfermode, caps, optimizations);

        switch (xfermode) {
            case SkBlendMode::kClear:
                TEST_ASSERT(!xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(0 == xpi.fBlendedColor.fKnownColor);
                TEST_ASSERT(kRGBA_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreColor_OptFlag |
                             kIgnoreCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kNone_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrc:
                TEST_ASSERT(!xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(229 == GrColorUnpackR(xpi.fBlendedColor.fKnownColor));
                TEST_ASSERT(154 == GrColorUnpackB(xpi.fBlendedColor.fKnownColor));
                TEST_ASSERT((kR_GrColorComponentFlag |
                             kB_GrColorComponentFlag) == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDst:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kSkipDraw_OptFlag |
                             kIgnoreColor_OptFlag |
                             kIgnoreCoverage_OptFlag |
                             kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kNone_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(!xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrcOver:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag |
                             kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kISA_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDstOver:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag |
                             kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kIDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrcIn:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDstIn:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kSA_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrcOut:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kIDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDstOut:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag |
                             kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kISA_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrcATop:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag |
                             kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kISA_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDstATop:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kIDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kSA_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kXor:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag |
                             kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kIDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kISA_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kPlus:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag |
                             kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kModulate:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kSC_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kScreen:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag |
                             kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kISC_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            default:
                ERRORF(reporter, "Invalid xfermode.");
                break;
        }
    }
}

static void test_color_opaque_with_coverage(skiatest::Reporter* reporter, const GrCaps& caps) {
    GrPipelineOptimizations optimizations;
    optimizations.fColorPOI.calcWithInitialValues(nullptr, 0, GrColorPackA4(255),
                                                  kA_GrColorComponentFlag, false);
    optimizations.fCoveragePOI.calcWithInitialValues(nullptr, 0, 0, kNone_GrColorComponentFlags,
                                                     true);

    SkASSERT(optimizations.fColorPOI.isOpaque());
    SkASSERT(!optimizations.fColorPOI.isSolidWhite());
    SkASSERT(!optimizations.fCoveragePOI.isSolidWhite());
    SkASSERT(!optimizations.fCoveragePOI.isFourChannelOutput());

    for (int m = 0; m <= (int)SkBlendMode::kLastCoeffMode; m++) {
        SkBlendMode xfermode = static_cast<SkBlendMode>(m);
        const GrPorterDuffTest::XPInfo xpi(reporter, xfermode, caps, optimizations);

        switch (xfermode) {
            case SkBlendMode::kClear:
                TEST_ASSERT(!xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(0 == xpi.fBlendedColor.fKnownColor);
                TEST_ASSERT(kRGBA_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreColor_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kCoverage_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kReverseSubtract_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kDC_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrc:
                TEST_ASSERT(!xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(255 == GrColorUnpackA(xpi.fBlendedColor.fKnownColor));
                TEST_ASSERT(kA_GrColorComponentFlag == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kISA_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDst:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kSkipDraw_OptFlag |
                             kIgnoreColor_OptFlag |
                             kIgnoreCoverage_OptFlag |
                             kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kNone_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(!xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrcOver:
                TEST_ASSERT(!xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(255 == GrColorUnpackA(xpi.fBlendedColor.fKnownColor));
                TEST_ASSERT(kA_GrColorComponentFlag == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kISA_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDstOver:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kIDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrcIn:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kISA_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDstIn:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kSkipDraw_OptFlag |
                             kIgnoreColor_OptFlag |
                             kIgnoreCoverage_OptFlag |
                             kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kNone_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(!xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrcOut:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kIDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kISA_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDstOut:
                TEST_ASSERT(!xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(0 == xpi.fBlendedColor.fKnownColor);
                TEST_ASSERT(kRGBA_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreColor_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kCoverage_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kReverseSubtract_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kDC_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrcATop:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kISA_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDstATop:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kIDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kXor:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kIDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kISA_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kPlus:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kModulate:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kNone_OptFlags) == xpi.fOptFlags);
                TEST_ASSERT(kISCModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kReverseSubtract_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kDC_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kScreen:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kISC_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            default:
                ERRORF(reporter, "Invalid xfermode.");
                break;
        }
    }
}

static void test_color_opaque_no_coverage(skiatest::Reporter* reporter, const GrCaps& caps) {
    GrPipelineOptimizations optimizations;
    optimizations.fColorPOI.calcWithInitialValues(nullptr, 0, GrColorPackRGBA(0, 82, 0, 255),
                                   kG_GrColorComponentFlag | kA_GrColorComponentFlag, false);
    optimizations.fCoveragePOI.calcWithInitialValues(nullptr, 0, GrColorPackA4(255),
                                                     kRGBA_GrColorComponentFlags, true);

    SkASSERT(optimizations.fColorPOI.isOpaque());
    SkASSERT(!optimizations.fColorPOI.isSolidWhite());
    SkASSERT(optimizations.fCoveragePOI.isSolidWhite());
    SkASSERT(!optimizations.fCoveragePOI.isFourChannelOutput());

    for (int m = 0; m <= (int)SkBlendMode::kLastCoeffMode; m++) {
        SkBlendMode xfermode = static_cast<SkBlendMode>(m);
        const GrPorterDuffTest::XPInfo xpi(reporter, xfermode, caps, optimizations);

        switch (xfermode) {
            case SkBlendMode::kClear:
                TEST_ASSERT(!xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(0 == xpi.fBlendedColor.fKnownColor);
                TEST_ASSERT(kRGBA_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreColor_OptFlag |
                             kIgnoreCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kNone_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrc:
                TEST_ASSERT(!xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(82 == GrColorUnpackG(xpi.fBlendedColor.fKnownColor));
                TEST_ASSERT(255 == GrColorUnpackA(xpi.fBlendedColor.fKnownColor));
                TEST_ASSERT((kG_GrColorComponentFlag |
                             kA_GrColorComponentFlag) == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDst:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kSkipDraw_OptFlag |
                             kIgnoreColor_OptFlag |
                             kIgnoreCoverage_OptFlag |
                             kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kNone_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(!xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrcOver:
                TEST_ASSERT(!xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(82 == GrColorUnpackG(xpi.fBlendedColor.fKnownColor));
                TEST_ASSERT(255 == GrColorUnpackA(xpi.fBlendedColor.fKnownColor));
                TEST_ASSERT((kG_GrColorComponentFlag |
                             kA_GrColorComponentFlag) == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDstOver:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag |
                             kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kIDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrcIn:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDstIn:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kSkipDraw_OptFlag |
                             kIgnoreColor_OptFlag |
                             kIgnoreCoverage_OptFlag |
                             kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kNone_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(!xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrcOut:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kIDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDstOut:
                TEST_ASSERT(!xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(0 == xpi.fBlendedColor.fKnownColor);
                TEST_ASSERT(kRGBA_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreColor_OptFlag |
                             kIgnoreCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kNone_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kSrcATop:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kDstATop:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag |
                             kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kIDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kXor:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kIDA_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kPlus:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag |
                             kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kModulate:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kZero_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kSC_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            case SkBlendMode::kScreen:
                TEST_ASSERT(xpi.fBlendedColor.fWillBlendWithDst);
                TEST_ASSERT(kNone_GrColorComponentFlags == xpi.fBlendedColor.fKnownColorFlags);
                TEST_ASSERT((kIgnoreCoverage_OptFlag |
                             kCanTweakAlphaForCoverage_OptFlag) == xpi.fOptFlags);
                TEST_ASSERT(kModulate_OutputType == xpi.fPrimaryOutputType);
                TEST_ASSERT(kNone_OutputType == xpi.fSecondaryOutputType);
                TEST_ASSERT(kAdd_GrBlendEquation == xpi.fBlendInfo.fEquation);
                TEST_ASSERT(kOne_GrBlendCoeff == xpi.fBlendInfo.fSrcBlend);
                TEST_ASSERT(kISC_GrBlendCoeff == xpi.fBlendInfo.fDstBlend);
                TEST_ASSERT(xpi.fBlendInfo.fWriteColor);
                break;
            default:
                ERRORF(reporter, "Invalid xfermode.");
                break;
        }
    }
}

static void test_lcd_coverage_fallback_case(skiatest::Reporter* reporter, const GrCaps& caps) {
    class TestLCDCoverageBatch: public GrVertexBatch {
    public:
        DEFINE_BATCH_CLASS_ID

        TestLCDCoverageBatch() : INHERITED(ClassID()) {}

    private:
        void computePipelineOptimizations(GrInitInvariantOutput* color,
                                          GrInitInvariantOutput* coverage,
                                          GrBatchToXPOverrides* overrides) const override {
            color->setKnownFourComponents(GrColorPackRGBA(123, 45, 67, 221));
            coverage->setUnknownFourComponents();
            coverage->setUsingLCDCoverage();        }

        const char* name() const override { return "Test LCD Text Batch"; }
        void initBatchTracker(const GrXPOverridesForBatch&) override {}
        bool onCombineIfPossible(GrBatch*, const GrCaps&) override  { return false; }
        void onPrepareDraws(Target*) const override {}

        typedef GrVertexBatch INHERITED;
    } testLCDCoverageBatch;

    GrPipelineOptimizations opts;
    testLCDCoverageBatch.getPipelineOptimizations(&opts);
    GrProcOptInfo colorPOI = opts.fColorPOI;
    GrProcOptInfo covPOI = opts.fCoveragePOI;

    SkASSERT(kRGBA_GrColorComponentFlags == colorPOI.validFlags());
    SkASSERT(covPOI.isFourChannelOutput());

    sk_sp<GrXPFactory> xpf(GrPorterDuffXPFactory::Make(SkBlendMode::kSrcOver));
    TEST_ASSERT(!xpf->willNeedDstTexture(caps, opts));

    sk_sp<GrXferProcessor> xp(xpf->createXferProcessor(opts, false, nullptr, caps));
    if (!xp) {
        ERRORF(reporter, "Failed to create an XP with LCD coverage.");
        return;
    }

    GrXPFactory::InvariantBlendedColor blendedColor;
    xpf->getInvariantBlendedColor(colorPOI, &blendedColor);
    TEST_ASSERT(blendedColor.fWillBlendWithDst);
    TEST_ASSERT(kNone_GrColorComponentFlags == blendedColor.fKnownColorFlags);

    GrColor overrideColor;
    xp->getOptimizations(opts, false, &overrideColor, caps);

    GrXferProcessor::BlendInfo blendInfo;
    xp->getBlendInfo(&blendInfo);
    TEST_ASSERT(blendInfo.fWriteColor);
}

DEF_GPUTEST(PorterDuffNoDualSourceBlending, reporter, /*factory*/) {
    GrContextOptions opts;
    opts.fSuppressDualSourceBlending = true;
    sk_gpu_test::GrContextFactory mockFactory(opts);
    GrContext* ctx = mockFactory.get(sk_gpu_test::GrContextFactory::kNullGL_ContextType);
    if (!ctx) {
        SkFAIL("Failed to create null context without ARB_blend_func_extended.");
        return;
    }

    const GrCaps& caps = *ctx->caps();
    if (caps.shaderCaps()->dualSourceBlendingSupport()) {
        SkFAIL("Null context failed to honor request for no ARB_blend_func_extended.");
        return;
    }

    GrBackendObject backendTex =
        ctx->getGpu()->createTestingOnlyBackendTexture(nullptr, 100, 100, kRGBA_8888_GrPixelConfig);
    GrBackendTextureDesc fakeDesc;
    fakeDesc.fConfig = kRGBA_8888_GrPixelConfig;
    fakeDesc.fWidth = fakeDesc.fHeight = 100;
    fakeDesc.fTextureHandle = backendTex;
    GrXferProcessor::DstTexture fakeDstTexture;
    fakeDstTexture.setTexture(
        ctx->textureProvider()->wrapBackendTexture(fakeDesc, kBorrow_GrWrapOwnership));

    static const GrColor testColors[] = {
        0,
        GrColorPackRGBA(0, 82, 0, 255),
        GrColorPackA4(255)
    };
    static const GrColorComponentFlags testColorFlags[] = {
        kNone_GrColorComponentFlags,
        kG_GrColorComponentFlag | kA_GrColorComponentFlag,
        kRGBA_GrColorComponentFlags
    };
    GR_STATIC_ASSERT(SK_ARRAY_COUNT(testColors) == SK_ARRAY_COUNT(testColorFlags));

    for (size_t c = 0; c < SK_ARRAY_COUNT(testColors); c++) {
        GrPipelineOptimizations optimizations;
        optimizations.fColorPOI.calcWithInitialValues(nullptr, 0, testColors[c], testColorFlags[c],
                                                      false);
        for (int f = 0; f <= 1; f++) {
            if (!f) {
                optimizations.fCoveragePOI.calcWithInitialValues(nullptr, 0, 0,
                                                                 kNone_GrColorComponentFlags, true);
            } else {
                optimizations.fCoveragePOI.calcWithInitialValues(nullptr, 0, GrColorPackA4(255),
                                                                 kRGBA_GrColorComponentFlags, true);
            }
            for (int m = 0; m <= (int)SkBlendMode::kLastCoeffMode; m++) {
                SkBlendMode xfermode = static_cast<SkBlendMode>(m);
                sk_sp<GrXPFactory> xpf(GrPorterDuffXPFactory::Make(xfermode));
                GrXferProcessor::DstTexture* dstTexture =
                    xpf->willNeedDstTexture(caps, optimizations) ? &fakeDstTexture : 0;
                sk_sp<GrXferProcessor> xp(
                    xpf->createXferProcessor(optimizations, false, dstTexture, caps));
                if (!xp) {
                    ERRORF(reporter, "Failed to create an XP without dual source blending.");
                    return;
                }
                TEST_ASSERT(!xp->hasSecondaryOutput());
                xp->getOptimizations(optimizations, false, 0, caps);
                TEST_ASSERT(!xp->hasSecondaryOutput());
            }
        }
    }
    ctx->getGpu()->deleteTestingOnlyBackendTexture(backendTex);
}

#endif