C++ sk_sp类代码示例

    void onDraw(SkCanvas* canvas) override {
        canvas->translate(20, 20);

        const SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100);

        for (size_t i = 0; i < SK_ARRAY_COUNT(gProcs); ++i) {
            sk_sp<SkImage> image(gProcs[i](canvas->getGrContext(), fPicture.get(), info));
            if (image) {
                this->testImage(canvas, image.get());
            }
            canvas->translate(120, 0);
        }
    }

void GrStyle::initPathEffect(sk_sp<SkPathEffect> pe) {
    SkASSERT(!fPathEffect);
    SkASSERT(SkPathEffect::kNone_DashType == fDashInfo.fType);
    SkASSERT(0 == fDashInfo.fIntervals.count());
    if (!pe) {
        return;
    }
    SkPathEffect::DashInfo info;
    if (SkPathEffect::kDash_DashType == pe->asADash(&info)) {
        SkStrokeRec::Style recStyle = fStrokeRec.getStyle();
        if (recStyle != SkStrokeRec::kFill_Style && recStyle != SkStrokeRec::kStrokeAndFill_Style) {
            fDashInfo.fType = SkPathEffect::kDash_DashType;
            fDashInfo.fIntervals.reset(info.fCount);
            fDashInfo.fPhase = info.fPhase;
            info.fIntervals = fDashInfo.fIntervals.get();
            pe->asADash(&info);
            fPathEffect = std::move(pe);
        }
    } else {
        fPathEffect = std::move(pe);
    }
}

std::unique_ptr<GrDrawOp> GrDrawVerticesOp::Make(GrPaint&& paint,
                                                 sk_sp<SkVertices> vertices,
                                                 const SkMatrix& viewMatrix,
                                                 GrAAType aaType,
                                                 bool gammaCorrect,
                                                 sk_sp<GrColorSpaceXform> colorSpaceXform,
                                                 GrPrimitiveType* overridePrimType) {
    SkASSERT(vertices);
    GrPrimitiveType primType = overridePrimType ? *overridePrimType
                                                : SkVertexModeToGrPrimitiveType(vertices->mode());
    return Helper::FactoryHelper<GrDrawVerticesOp>(std::move(paint), std::move(vertices), primType,
                                                   aaType, gammaCorrect, std::move(colorSpaceXform),
                                                   viewMatrix);
}

sk_sp<GrTextureContext> GrDrawingManager::makeTextureContext(sk_sp<GrSurfaceProxy> sProxy,
                                                             sk_sp<SkColorSpace> colorSpace) {
    if (this->wasAbandoned() || !sProxy->asTextureProxy()) {
        return nullptr;
    }

    // SkSurface catches bad color space usage at creation. This check handles anything that slips
    // by, including internal usage.
    if (!SkSurface_Gpu::Valid(fContext, sProxy->config(), colorSpace.get())) {
        SkDEBUGFAIL("Invalid config and colorspace combination");
        return nullptr;
    }

    // GrTextureRenderTargets should always be using a GrRenderTargetContext
    SkASSERT(!sProxy->asRenderTargetProxy());

    sk_sp<GrTextureProxy> textureProxy(sk_ref_sp(sProxy->asTextureProxy()));

    return sk_sp<GrTextureContext>(new GrTextureContext(fContext, this, std::move(textureProxy),
                                                        std::move(colorSpace),
                                                        fContext->contextPriv().getAuditTrail(),
                                                        fSingleOwner));
}

sk_sp<SkImage> SkImage::makeColorSpace(sk_sp<SkColorSpace> target,
                                       SkTransferFunctionBehavior premulBehavior) const {
    SkColorSpaceTransferFn fn;
    if (!target || !target->isNumericalTransferFn(&fn)) {
        return nullptr;
    }

    // No need to create a new image if:
    // (1) The color spaces are equal.
    // (2) The color type is kAlpha8.
    if (SkColorSpace::Equals(this->colorSpace(), target.get()) ||
            kAlpha_8_SkColorType == as_IB(this)->onImageInfo().colorType()) {
        return sk_ref_sp(const_cast<SkImage*>(this));
    }

    SkColorType targetColorType = kN32_SkColorType;
    if (SkTransferFunctionBehavior::kRespect == premulBehavior && target->gammaIsLinear()) {
        targetColorType = kRGBA_F16_SkColorType;
    }

    // TODO: We might consider making this a deferred conversion?
    return as_IB(this)->onMakeColorSpace(std::move(target), targetColorType, premulBehavior);
}

void GrResourceIOProcessor::TextureSampler::reset(GrResourceProvider* resourceProvider,
                                                  sk_sp<GrTextureProxy> proxy,
                                                  GrSamplerParams::FilterMode filterMode,
                                                  SkShader::TileMode tileXAndY,
                                                  GrShaderFlags visibility) {
    // For now, end the deferral at this time. Once all the TextureSamplers are swapped over
    // to taking a GrSurfaceProxy just use the IORefs on the proxy
    GrTexture* texture = proxy->instantiate(resourceProvider);
    SkASSERT(texture);
    fTexture.set(SkRef(texture), kRead_GrIOType);
    filterMode = SkTMin(filterMode, texture->texturePriv().highestFilterMode());
    fParams.reset(tileXAndY, filterMode);
    fVisibility = visibility;
}

void FuzzImageFilterDeserialize(sk_sp<SkData> bytes) {
    const int BitmapSize = 24;
    SkBitmap bitmap;
    bitmap.allocN32Pixels(BitmapSize, BitmapSize);
    SkCanvas canvas(bitmap);
    canvas.clear(0x00000000);

    auto flattenable = SkImageFilter::Deserialize(bytes->data(), bytes->size());

    if (flattenable != nullptr) {
        // Let's see if using the filters can cause any trouble...
        SkPaint paint;
        paint.setImageFilter(flattenable);
        canvas.save();
        canvas.clipRect(SkRect::MakeXYWH(
            0, 0, SkIntToScalar(BitmapSize), SkIntToScalar(BitmapSize)));

        // This call shouldn't crash or cause ASAN to flag any memory issues
        // If nothing bad happens within this call, everything is fine
        canvas.drawBitmap(bitmap, 0, 0, &paint);

        canvas.restore();
    }
}

// Exercise the public API of SkSpecialSurface (e.g., getCanvas, newImageSnapshot)
static void test_surface(const sk_sp<SkSpecialSurface>& surf,
                         skiatest::Reporter* reporter,
                         int offset) {

    const SkIRect surfSubset = TestingSpecialSurfaceAccess::Subset(surf.get());
    REPORTER_ASSERT(reporter, offset == surfSubset.fLeft);
    REPORTER_ASSERT(reporter, offset == surfSubset.fTop);
    REPORTER_ASSERT(reporter, kSmallerSize == surfSubset.width());
    REPORTER_ASSERT(reporter, kSmallerSize == surfSubset.height());

    SkCanvas* canvas = surf->getCanvas();
    SkASSERT_RELEASE(canvas);

    canvas->clear(SK_ColorRED);

    sk_sp<SkSpecialImage> img(surf->makeImageSnapshot());
    REPORTER_ASSERT(reporter, img);

    const SkIRect imgSubset = img->subset();
    REPORTER_ASSERT(reporter, surfSubset == imgSubset);

    // the canvas was invalidated by the newImageSnapshot call
    REPORTER_ASSERT(reporter, !surf->getCanvas());
}

sk_sp<sksg::PaintNode> AttachStroke(const Json::Value& jstroke, AttachContext* ctx,
                                    sk_sp<sksg::PaintNode> stroke_node) {
    SkASSERT(jstroke.isObject());

    if (!stroke_node)
        return nullptr;

    stroke_node->setStyle(SkPaint::kStroke_Style);

    auto width_attached = BindProperty<ScalarValue>(jstroke["w"], &ctx->fAnimators,
        [stroke_node](const ScalarValue& w) {
            stroke_node->setStrokeWidth(w);
        });
    if (!width_attached)
        return nullptr;

    stroke_node->setStrokeMiter(ParseDefault(jstroke["ml"], 4.0f));

    static constexpr SkPaint::Join gJoins[] = {
        SkPaint::kMiter_Join,
        SkPaint::kRound_Join,
        SkPaint::kBevel_Join,
    };
    stroke_node->setStrokeJoin(gJoins[SkTPin<int>(ParseDefault(jstroke["lj"], 1) - 1,
                                                  0, SK_ARRAY_COUNT(gJoins) - 1)]);

    static constexpr SkPaint::Cap gCaps[] = {
        SkPaint::kButt_Cap,
        SkPaint::kRound_Cap,
        SkPaint::kSquare_Cap,
    };
    stroke_node->setStrokeCap(gCaps[SkTPin<int>(ParseDefault(jstroke["lc"], 1) - 1,
                                                0, SK_ARRAY_COUNT(gCaps) - 1)]);

    return stroke_node;
}

sk_sp<SkPixelRef> SkMallocPixelRef::MakeWithProc(const SkImageInfo& info,
                                                 size_t rowBytes,
                                                 sk_sp<SkColorTable> ctable,
                                                 void* addr,
                                                 SkMallocPixelRef::ReleaseProc proc,
                                                 void* context) {
    if (!is_valid(info, ctable.get())) {
        if (proc) {
            proc(addr, context);
        }
        return nullptr;
    }
    return sk_sp<SkPixelRef>(new SkMallocPixelRef(info, addr, rowBytes, std::move(ctable),
                                                  proc, context));
}

sk_sp<GrTextureProxy> GrTextureProducer::CopyOnGpu(GrContext* context,
                                                   sk_sp<GrTextureProxy> inputProxy,
                                                   const CopyParams& copyParams,
                                                   bool dstWillRequireMipMaps) {
    SkASSERT(context);

    const SkRect dstRect = SkRect::MakeIWH(copyParams.fWidth, copyParams.fHeight);
    GrMipMapped mipMapped = dstWillRequireMipMaps ? GrMipMapped::kYes : GrMipMapped::kNo;

    SkRect localRect = SkRect::MakeWH(inputProxy->width(), inputProxy->height());

    bool needsDomain = false;
    bool resizing = false;
    if (copyParams.fFilter != GrSamplerState::Filter::kNearest) {
        bool resizing = localRect.width()  != dstRect.width() ||
                        localRect.height() != dstRect.height();
        needsDomain = resizing && !GrProxyProvider::IsFunctionallyExact(inputProxy.get());
    }

    if (copyParams.fFilter == GrSamplerState::Filter::kNearest && !needsDomain && !resizing &&
        dstWillRequireMipMaps) {
        sk_sp<GrTextureProxy> proxy = GrCopyBaseMipMapToTextureProxy(context, inputProxy.get());
        if (proxy) {
            return proxy;
        }
    }

    sk_sp<GrRenderTargetContext> copyRTC =
        context->contextPriv().makeDeferredRenderTargetContextWithFallback(
            SkBackingFit::kExact, dstRect.width(), dstRect.height(), inputProxy->config(),
            nullptr, 1, mipMapped, inputProxy->origin());
    if (!copyRTC) {
        return nullptr;
    }

    GrPaint paint;

    if (needsDomain) {
        const SkRect domain = localRect.makeInset(0.5f, 0.5f);
        // This would cause us to read values from outside the subset. Surely, the caller knows
        // better!
        SkASSERT(copyParams.fFilter != GrSamplerState::Filter::kMipMap);
        paint.addColorFragmentProcessor(
            GrTextureDomainEffect::Make(std::move(inputProxy), SkMatrix::I(), domain,
                                        GrTextureDomain::kClamp_Mode, copyParams.fFilter));
    } else {
        GrSamplerState samplerState(GrSamplerState::WrapMode::kClamp, copyParams.fFilter);
        paint.addColorTextureProcessor(std::move(inputProxy), SkMatrix::I(), samplerState);
    }
    paint.setPorterDuffXPFactory(SkBlendMode::kSrc);

    copyRTC->fillRectToRect(GrNoClip(), std::move(paint), GrAA::kNo, SkMatrix::I(), dstRect,
                            localRect);
    return copyRTC->asTextureProxyRef();
}

    SkSpecialSurface_Gpu(GrContext* context, sk_sp<GrRenderTargetContext> renderTargetContext,
                         int width, int height, const SkIRect& subset)
        : INHERITED(subset, &renderTargetContext->surfaceProps())
        , fRenderTargetContext(std::move(renderTargetContext)) {

        sk_sp<SkBaseDevice> device(SkGpuDevice::Make(context, fRenderTargetContext, width, height,
                                                     SkGpuDevice::kUninit_InitContents));
        if (!device) {
            return;
        }

        fCanvas.reset(new SkCanvas(device));
        fCanvas->clipRect(SkRect::Make(subset));
#ifdef SK_IS_BOT
        fCanvas->clear(SK_ColorRED);  // catch any imageFilter sloppiness
#endif
    }

    void gradCheck(skiatest::Reporter* reporter, const sk_sp<SkShader>& shader,
                   SkShader::GradientInfo* info,
                   SkShader::GradientType gt) const {
        SkAutoTMalloc<SkColor> colorStorage(fColorCount);
        SkAutoTMalloc<SkScalar> posStorage(fColorCount);

        info->fColorCount = fColorCount;
        info->fColors = colorStorage;
        info->fColorOffsets = posStorage.get();
        REPORTER_ASSERT(reporter, shader->asAGradient(info) == gt);

        REPORTER_ASSERT(reporter, info->fColorCount == fColorCount);
        REPORTER_ASSERT(reporter,
                        !memcmp(info->fColors, fColors, fColorCount * sizeof(SkColor)));
        REPORTER_ASSERT(reporter,
                        !memcmp(info->fColorOffsets, fPos, fColorCount * sizeof(SkScalar)));
        REPORTER_ASSERT(reporter, fTileMode == (SkTileMode)info->fTileMode);
    }

// If either id is different or the clip or the matrix are different the
// cached image won't be found. Even if it is caching the same bitmap.
static void test_dont_find_if_diff_key(skiatest::Reporter* reporter,
                                       const sk_sp<SkSpecialImage>& image,
                                       const sk_sp<SkSpecialImage>& subset) {
    static const size_t kCacheSize = 1000000;
    SkAutoTUnref<SkImageFilter::Cache> cache(SkImageFilter::Cache::Create(kCacheSize));

    SkIRect clip1 = SkIRect::MakeWH(100, 100);
    SkIRect clip2 = SkIRect::MakeWH(200, 200);
    SkImageFilter::Cache::Key key0(0, SkMatrix::I(), clip1, image->uniqueID(), image->subset());
    SkImageFilter::Cache::Key key1(1, SkMatrix::I(), clip1, image->uniqueID(), image->subset());
    SkImageFilter::Cache::Key key2(0, SkMatrix::MakeTrans(5, 5), clip1,
                                   image->uniqueID(), image->subset());
    SkImageFilter::Cache::Key key3(0, SkMatrix::I(), clip2, image->uniqueID(), image->subset());
    SkImageFilter::Cache::Key key4(0, SkMatrix::I(), clip1, subset->uniqueID(), subset->subset());

    SkIPoint offset = SkIPoint::Make(3, 4);
    cache->set(key0, image.get(), offset);

    SkIPoint foundOffset;
    REPORTER_ASSERT(reporter, !cache->get(key1, &foundOffset));
    REPORTER_ASSERT(reporter, !cache->get(key2, &foundOffset));
    REPORTER_ASSERT(reporter, !cache->get(key3, &foundOffset));
    REPORTER_ASSERT(reporter, !cache->get(key4, &foundOffset));
}

std::unique_ptr<GrDrawOp> GrDrawVerticesOp::Make(GrRecordingContext* context,
                                                 GrPaint&& paint,
                                                 sk_sp<SkVertices> vertices,
                                                 const SkVertices::Bone bones[],
                                                 int boneCount,
                                                 const SkMatrix& viewMatrix,
                                                 GrAAType aaType,
                                                 sk_sp<GrColorSpaceXform> colorSpaceXform,
                                                 GrPrimitiveType* overridePrimType) {
    SkASSERT(vertices);
    GrPrimitiveType primType = overridePrimType ? *overridePrimType
                                                : SkVertexModeToGrPrimitiveType(vertices->mode());
    return GrSimpleMeshDrawOpHelper::FactoryHelper<DrawVerticesOp>(context, std::move(paint),
                                                                   std::move(vertices),
                                                                   bones, boneCount,
                                                                   primType, aaType,
                                                                   std::move(colorSpaceXform),
                                                                   viewMatrix);
}