C++ GrPaint::setXPFactory方法代码示例

static void test_path(GrContext* ctx,
                      GrRenderTargetContext* renderTargetContext,
                      const SkPath& path,
                      const SkMatrix& matrix = SkMatrix::I(),
                      GrAAType aaType = GrAAType::kNone,
                      std::unique_ptr<GrFragmentProcessor> fp = nullptr) {
    GrTessellatingPathRenderer tess;

    GrPaint paint;
    paint.setXPFactory(GrPorterDuffXPFactory::Get(SkBlendMode::kSrc));
    if (fp) {
        paint.addColorFragmentProcessor(std::move(fp));
    }

    GrNoClip noClip;
    SkIRect clipConservativeBounds = SkIRect::MakeWH(renderTargetContext->width(),
                                                     renderTargetContext->height());
    GrStyle style(SkStrokeRec::kFill_InitStyle);
    GrShape shape(path, style);
    GrPathRenderer::DrawPathArgs args{ctx,
                                      std::move(paint),
                                      &GrUserStencilSettings::kUnused,
                                      renderTargetContext,
                                      &noClip,
                                      &clipConservativeBounds,
                                      &matrix,
                                      &shape,
                                      aaType,
                                      false};
    tess.drawPath(args);
}

bool SkAndroidFrameworkUtils::clipWithStencil(SkCanvas* canvas) {
    SkRegion clipRegion;
    canvas->temporary_internal_getRgnClip(&clipRegion);
    if (clipRegion.isEmpty()) {
        return false;
    }
    SkBaseDevice* device = canvas->getDevice();
    if (!device) {
        return false;
    }
    GrRenderTargetContext* rtc = device->accessRenderTargetContext();
    if (!rtc) {
        return false;
    }
    GrPaint grPaint;
    grPaint.setXPFactory(GrDisableColorXPFactory::Get());
    GrNoClip noClip;
    static constexpr GrUserStencilSettings kDrawToStencil(
        GrUserStencilSettings::StaticInit<
            0x1,
            GrUserStencilTest::kAlways,
            0x1,
            GrUserStencilOp::kReplace,
            GrUserStencilOp::kReplace,
            0x1>()
    );
    rtc->drawRegion(noClip, std::move(grPaint), GrAA::kNo, SkMatrix::I(), clipRegion,
                    GrStyle::SimpleFill(), &kDrawToStencil);
    return true;
}

    void onDraw(SkCanvas* canvas) override {
        GrRenderTargetContext* renderTargetContext =
            canvas->internal_private_accessTopLayerRenderTargetContext();
        if (!renderTargetContext) {
            skiagm::GM::DrawGpuOnlyMessage(canvas);
            return;
        }

        GrContext* context = canvas->getGrContext();
        if (!context) {
            return;
        }

        GrProxyProvider* proxyProvider = context->contextPriv().proxyProvider();
        sk_sp<GrTextureProxy> proxy[3];

        for (int i = 0; i < 3; ++i) {
            int index = (0 == i) ? 0 : 1;
            GrSurfaceDesc desc;
            desc.fWidth = fBmp[index].width();
            desc.fHeight = fBmp[index].height();
            desc.fConfig = SkImageInfo2GrPixelConfig(fBmp[index].info(), *context->caps());
            SkASSERT(kUnknown_GrPixelConfig != desc.fConfig);

            proxy[i] = proxyProvider->createTextureProxy(
                    desc, SkBudgeted::kYes, fBmp[index].getPixels(), fBmp[index].rowBytes());
            if (!proxy[i]) {
                return;
            }
        }

        constexpr SkScalar kDrawPad = 10.f;
        constexpr SkScalar kTestPad = 10.f;
        constexpr SkScalar kColorSpaceOffset = 36.f;
        SkISize sizes[3] = {{YSIZE, YSIZE}, {USIZE, USIZE}, {VSIZE, VSIZE}};

        for (int space = kJPEG_SkYUVColorSpace; space <= kLastEnum_SkYUVColorSpace; ++space) {
            SkRect renderRect =
                SkRect::MakeWH(SkIntToScalar(fBmp[0].width()), SkIntToScalar(fBmp[0].height()));
            renderRect.outset(kDrawPad, kDrawPad);

            SkScalar y = kDrawPad + kTestPad + space * kColorSpaceOffset;
            SkScalar x = kDrawPad + kTestPad;

            GrPaint grPaint;
            grPaint.setXPFactory(GrPorterDuffXPFactory::Get(SkBlendMode::kSrc));
            auto fp = GrYUVtoRGBEffect::Make(proxy[0], proxy[1], proxy[2], sizes,
                                             static_cast<SkYUVColorSpace>(space), true);
            if (fp) {
                SkMatrix viewMatrix;
                viewMatrix.setTranslate(x, y);
                grPaint.addColorFragmentProcessor(std::move(fp));
                std::unique_ptr<GrDrawOp> op(GrRectOpFactory::MakeNonAAFill(
                                std::move(grPaint), viewMatrix, renderRect, GrAAType::kNone));
                renderTargetContext->priv().testingOnly_addDrawOp(std::move(op));
            }
        }
    }

void GrDefaultPathRenderer::onStencilPath(const StencilPathArgs& args) {
    GR_AUDIT_TRAIL_AUTO_FRAME(args.fDrawContext->auditTrail(),
                              "GrDefaultPathRenderer::onStencilPath");
    SkASSERT(!args.fShape->inverseFilled());

    GrPaint paint;
    paint.setXPFactory(GrDisableColorXPFactory::Make());
    paint.setAntiAlias(args.fIsAA);

    this->internalDrawPath(args.fDrawContext, paint, GrUserStencilSettings::kUnused, *args.fClip,
                           *args.fViewMatrix, *args.fShape, true);
}

void GrDefaultPathRenderer::onStencilPath(const StencilPathArgs& args) {
    GR_AUDIT_TRAIL_AUTO_FRAME(args.fDrawContext->auditTrail(),
                              "GrDefaultPathRenderer::onStencilPath");
    SkASSERT(SkPath::kInverseEvenOdd_FillType != args.fPath->getFillType());
    SkASSERT(SkPath::kInverseWinding_FillType != args.fPath->getFillType());

    GrPaint paint;
    paint.setXPFactory(GrDisableColorXPFactory::Make());
    paint.setAntiAlias(args.fIsAA);

    this->internalDrawPath(args.fDrawContext,
                           paint,
                           &GrUserStencilSettings::kUnused,
                           *args.fClip,
                           GrColor_WHITE,
                           *args.fViewMatrix,
                           *args.fPath,
                           GrStyle::SimpleFill(),
                           true);
}

// This test case including path coords and matrix taken from crbug.com/627443.
// Because of inaccuracies in large floating point values this causes the
// the path renderer to attempt to add a path DF to its atlas that is larger
// than the plot size which used to crash rather than fail gracefully.
static void test_far_from_origin(GrDrawContext* drawContext, GrPathRenderer* pr,
                                 GrResourceProvider* rp) {
    SkPath path;
    path.lineTo(49.0255089839f, 0.473541f);
    static constexpr SkScalar mvals[] = {14.0348252854f, 2.13026182736f,
                                         13.6122547187f, 118.309922702f,
                                         1912337682.09f, 2105391889.87f};
    SkMatrix matrix;
    matrix.setAffine(mvals);
    SkMatrix inverse;
    SkAssertResult(matrix.invert(&inverse));
    path.transform(inverse);

    SkStrokeRec rec(SkStrokeRec::kFill_InitStyle);
    rec.setStrokeStyle(1.f);
    rec.setStrokeParams(SkPaint::kRound_Cap, SkPaint::kRound_Join, 1.f);
    GrStyle style(rec, nullptr);

    GrShape shape(path, style);
    shape = shape.applyStyle(GrStyle::Apply::kPathEffectAndStrokeRec, 1.f);

    GrPaint paint;
    paint.setXPFactory(GrPorterDuffXPFactory::Make(SkXfermode::kSrc_Mode));

    GrNoClip noClip;
    GrPathRenderer::DrawPathArgs args;
    args.fPaint = &paint;
    args.fUserStencilSettings = &GrUserStencilSettings::kUnused;
    args.fDrawContext = drawContext;
    args.fClip = &noClip;
    args.fResourceProvider = rp;
    args.fViewMatrix = &matrix;
    args.fShape = &shape;
    args.fAntiAlias = true;
    args.fGammaCorrect = false;
    args.fColor = 0x0;
    pr->drawPath(args);
}

bool GrDrawingManager::ProgramUnitTest(GrContext* context, int maxStages, int maxLevels) {
    GrDrawingManager* drawingManager = context->contextPriv().drawingManager();
    GrProxyProvider* proxyProvider = context->contextPriv().proxyProvider();

    sk_sp<GrTextureProxy> proxies[2];

    // setup dummy textures
    {
        GrSurfaceDesc dummyDesc;
        dummyDesc.fFlags = kRenderTarget_GrSurfaceFlag;
        dummyDesc.fWidth = 34;
        dummyDesc.fHeight = 18;
        dummyDesc.fConfig = kRGBA_8888_GrPixelConfig;
        proxies[0] = proxyProvider->createProxy(dummyDesc, kBottomLeft_GrSurfaceOrigin,
                                                SkBackingFit::kExact, SkBudgeted::kNo);
    }
    {
        GrSurfaceDesc dummyDesc;
        dummyDesc.fFlags = kNone_GrSurfaceFlags;
        dummyDesc.fWidth = 16;
        dummyDesc.fHeight = 22;
        dummyDesc.fConfig = kAlpha_8_GrPixelConfig;
        proxies[1] = proxyProvider->createProxy(dummyDesc, kTopLeft_GrSurfaceOrigin,
                                                SkBackingFit::kExact, SkBudgeted::kNo);
    }

    if (!proxies[0] || !proxies[1]) {
        SkDebugf("Could not allocate dummy textures");
        return false;
    }

    // dummy scissor state
    GrScissorState scissor;

    SkRandom random;
    static const int NUM_TESTS = 1024;
    for (int t = 0; t < NUM_TESTS; t++) {
        // setup random render target(can fail)
        sk_sp<GrRenderTargetContext> renderTargetContext(random_render_target_context(
            context, &random, context->caps()));
        if (!renderTargetContext) {
            SkDebugf("Could not allocate renderTargetContext");
            return false;
        }

        GrPaint paint;
        GrProcessorTestData ptd(&random, context, renderTargetContext.get(), proxies);
        set_random_color_coverage_stages(&paint, &ptd, maxStages, maxLevels);
        set_random_xpf(&paint, &ptd);
        set_random_state(&paint, &random);
        GrDrawRandomOp(&random, renderTargetContext.get(), std::move(paint));
    }
    // Flush everything, test passes if flush is successful(ie, no asserts are hit, no crashes)
    drawingManager->flush(nullptr);

    // Validate that GrFPs work correctly without an input.
    sk_sp<GrRenderTargetContext> renderTargetContext(
                 context->contextPriv().makeDeferredRenderTargetContext(SkBackingFit::kExact,
                                                                        kRenderTargetWidth,
                                                                        kRenderTargetHeight,
                                                                        kRGBA_8888_GrPixelConfig,
                                                                        nullptr));
    if (!renderTargetContext) {
        SkDebugf("Could not allocate a renderTargetContext");
        return false;
    }

    int fpFactoryCnt = GrFragmentProcessorTestFactory::Count();
    for (int i = 0; i < fpFactoryCnt; ++i) {
        // Since FP factories internally randomize, call each 10 times.
        for (int j = 0; j < 10; ++j) {
            GrProcessorTestData ptd(&random, context, renderTargetContext.get(), proxies);

            GrPaint paint;
            paint.setXPFactory(GrPorterDuffXPFactory::Get(SkBlendMode::kSrc));
            auto fp = GrFragmentProcessorTestFactory::MakeIdx(i, &ptd);
            auto blockFP = BlockInputFragmentProcessor::Make(std::move(fp));
            paint.addColorFragmentProcessor(std::move(blockFP));
            GrDrawRandomOp(&random, renderTargetContext.get(), std::move(paint));
            drawingManager->flush(nullptr);
        }
    }

    return true;
}

bool GrDrawingManager::ProgramUnitTest(GrContext* context, int maxStages) {
    GrDrawingManager* drawingManager = context->drawingManager();

    // setup dummy textures
    GrSurfaceDesc dummyDesc;
    dummyDesc.fFlags = kRenderTarget_GrSurfaceFlag;
    dummyDesc.fConfig = kSkia8888_GrPixelConfig;
    dummyDesc.fWidth = 34;
    dummyDesc.fHeight = 18;
    SkAutoTUnref<GrTexture> dummyTexture1(
        context->textureProvider()->createTexture(dummyDesc, SkBudgeted::kNo, nullptr, 0));
    dummyDesc.fFlags = kNone_GrSurfaceFlags;
    dummyDesc.fConfig = kAlpha_8_GrPixelConfig;
    dummyDesc.fWidth = 16;
    dummyDesc.fHeight = 22;
    SkAutoTUnref<GrTexture> dummyTexture2(
        context->textureProvider()->createTexture(dummyDesc, SkBudgeted::kNo, nullptr, 0));

    if (!dummyTexture1 || ! dummyTexture2) {
        SkDebugf("Could not allocate dummy textures");
        return false;
    }

    GrTexture* dummyTextures[] = {dummyTexture1.get(), dummyTexture2.get()};

    // dummy scissor state
    GrScissorState scissor;

    SkRandom random;
    static const int NUM_TESTS = 1024;
    for (int t = 0; t < NUM_TESTS; t++) {
        // setup random render target(can fail)
        sk_sp<GrDrawContext> drawContext(random_draw_context(context, &random, context->caps()));
        if (!drawContext) {
            SkDebugf("Could not allocate drawContext");
            return false;
        }

        GrPaint grPaint;

        SkAutoTUnref<GrDrawBatch> batch(GrRandomDrawBatch(&random, context));
        SkASSERT(batch);

        GrProcessorTestData ptd(&random, context, context->caps(),
                                drawContext.get(), dummyTextures);
        set_random_color_coverage_stages(&grPaint, &ptd, maxStages);
        set_random_xpf(&grPaint, &ptd);
        bool snapToCenters = set_random_state(&grPaint, &random);
        const GrUserStencilSettings* uss = get_random_stencil(&random);

        drawContext->drawContextPriv().testingOnly_drawBatch(grPaint, batch, uss, snapToCenters);
    }
    // Flush everything, test passes if flush is successful(ie, no asserts are hit, no crashes)
    drawingManager->flush();

    // Validate that GrFPs work correctly without an input.
    sk_sp<GrDrawContext> drawContext(context->newDrawContext(SkBackingFit::kExact,
                                                             kRenderTargetWidth,
                                                             kRenderTargetHeight,
                                                             kRGBA_8888_GrPixelConfig));
    if (!drawContext) {
        SkDebugf("Could not allocate a drawContext");
        return false;
    }

    int fpFactoryCnt = GrProcessorTestFactory<GrFragmentProcessor>::Count();
    for (int i = 0; i < fpFactoryCnt; ++i) {
        // Since FP factories internally randomize, call each 10 times.
        for (int j = 0; j < 10; ++j) {
            SkAutoTUnref<GrDrawBatch> batch(GrRandomDrawBatch(&random, context));
            SkASSERT(batch);
            GrProcessorTestData ptd(&random, context, context->caps(),
                                    drawContext.get(), dummyTextures);
            GrPaint grPaint;
            grPaint.setXPFactory(GrPorterDuffXPFactory::Make(SkXfermode::kSrc_Mode));

            sk_sp<GrFragmentProcessor> fp(
                GrProcessorTestFactory<GrFragmentProcessor>::MakeIdx(i, &ptd));
            sk_sp<GrFragmentProcessor> blockFP(
                BlockInputFragmentProcessor::Make(std::move(fp)));
            grPaint.addColorFragmentProcessor(std::move(blockFP));

            drawContext->drawContextPriv().testingOnly_drawBatch(grPaint, batch);
            drawingManager->flush();
        }
    }

    return true;
}

//.........这里部分代码省略.........
                    return false;
                }
            }

            bool canRenderDirectToStencil =
                GrPathRenderer::kNoRestriction_StencilSupport == stencilSupport;
            bool drawDirectToClip; // Given the renderer, the element,
                                   // fill rule, and set operation should
                                   // we render the element directly to
                                   // stencil bit used for clipping.
            GrUserStencilSettings const* const* stencilPasses =
                GrStencilSettings::GetClipPasses(op, canRenderDirectToStencil, fillInverted,
                                                 &drawDirectToClip);

            // draw the element to the client stencil bits if necessary
            if (!drawDirectToClip) {
                static constexpr GrUserStencilSettings kDrawToStencil(
                     GrUserStencilSettings::StaticInit<
                         0x0000,
                         GrUserStencilTest::kAlways,
                         0xffff,
                         GrUserStencilOp::kIncMaybeClamp,
                         GrUserStencilOp::kIncMaybeClamp,
                         0xffff>()
                );
                if (Element::kRect_Type == element->getType()) {
                    drawContext->drawContextPriv().stencilRect(clip, &kDrawToStencil, useHWAA,
                                                               viewMatrix, element->getRect());
                } else {
                    if (!clipPath.isEmpty()) {
                        GrShape shape(clipPath, GrStyle::SimpleFill());
                        if (canRenderDirectToStencil) {
                            GrPaint paint;
                            paint.setXPFactory(GrDisableColorXPFactory::Make());
                            paint.setAntiAlias(element->isAA());

                            GrPathRenderer::DrawPathArgs args;
                            args.fResourceProvider = context->resourceProvider();
                            args.fPaint = &paint;
                            args.fUserStencilSettings = &kDrawToStencil;
                            args.fDrawContext = drawContext;
                            args.fClip = &clip;
                            args.fColor = GrColor_WHITE;
                            args.fViewMatrix = &viewMatrix;
                            args.fShape = &shape;
                            args.fAntiAlias = false;
                            args.fGammaCorrect = false;
                            pr->drawPath(args);
                        } else {
                            GrPathRenderer::StencilPathArgs args;
                            args.fResourceProvider = context->resourceProvider();
                            args.fDrawContext = drawContext;
                            args.fClip = &clip;
                            args.fViewMatrix = &viewMatrix;
                            args.fIsAA = element->isAA();
                            args.fShape = &shape;
                            pr->stencilPath(args);
                        }
                    }
                }
            }

            // now we modify the clip bit by rendering either the clip
            // element directly or a bounding rect of the entire clip.
            clip.enableStencilClip(true);
            for (GrUserStencilSettings const* const* pass = stencilPasses; *pass; ++pass) {