C++ sk_sp::get方法代码示例

static void draw_image(SkCanvas* canvas, SkImage* image, SkColorType dstColorType,
                       SkAlphaType dstAlphaType, sk_sp<SkColorSpace> dstColorSpace,
                       SkImage::CachingHint hint) {
    size_t rowBytes = image->width() * SkColorTypeBytesPerPixel(dstColorType);
    sk_sp<SkData> data = SkData::MakeUninitialized(rowBytes * image->height());
    dstColorSpace = fix_for_colortype(dstColorSpace.get(), dstColorType);
    SkImageInfo dstInfo = SkImageInfo::Make(image->width(), image->height(), dstColorType,
                                            dstAlphaType, dstColorSpace);
    if (!image->readPixels(dstInfo, data->writable_data(), rowBytes, 0, 0, hint)) {
        memset(data->writable_data(), 0, rowBytes * image->height());
    }

    // SkImage must be premul, so manually premul the data if we unpremul'd during readPixels
    if (kUnpremul_SkAlphaType == dstAlphaType) {
        auto xform = SkColorSpaceXform::New(dstColorSpace.get(), dstColorSpace.get());
        if (!xform->apply(select_xform_format(dstColorType), data->writable_data(),
                          select_xform_format(dstColorType), data->data(),
                          image->width() * image->height(), kPremul_SkAlphaType)) {
            memset(data->writable_data(), 0, rowBytes * image->height());
        }
        dstInfo = dstInfo.makeAlphaType(kPremul_SkAlphaType);
    }

    // readPixels() does not always clamp F16.  The drawing code expects pixels in the 0-1 range.
    clamp_if_necessary(dstInfo, data->writable_data());

    // Now that we have called readPixels(), dump the raw pixels into an srgb image.
    sk_sp<SkColorSpace> srgb = fix_for_colortype(
            SkColorSpace::MakeSRGB().get(), dstColorType);
    sk_sp<SkImage> raw = SkImage::MakeRasterData(dstInfo.makeColorSpace(srgb), data, rowBytes);
    canvas->drawImage(raw.get(), 0.0f, 0.0f, nullptr);
}

GrMatrixConvolutionEffect::GrMatrixConvolutionEffect(sk_sp<GrTextureProxy> proxy,
                                                     const SkIRect& bounds,
                                                     const SkISize& kernelSize,
                                                     const SkScalar* kernel,
                                                     SkScalar gain,
                                                     SkScalar bias,
                                                     const SkIPoint& kernelOffset,
                                                     GrTextureDomain::Mode tileMode,
                                                     bool convolveAlpha)
        // To advertise either the modulation or opaqueness optimizations we'd have to examine the
        // parameters.
        : INHERITED(kGrMatrixConvolutionEffect_ClassID, kNone_OptimizationFlags)
        , fCoordTransform(proxy.get())
        , fDomain(proxy.get(), GrTextureDomain::MakeTexelDomainForMode(bounds, tileMode), tileMode)
        , fTextureSampler(std::move(proxy))
        , fKernelSize(kernelSize)
        , fGain(SkScalarToFloat(gain))
        , fBias(SkScalarToFloat(bias) / 255.0f)
        , fConvolveAlpha(convolveAlpha) {
    this->addCoordTransform(&fCoordTransform);
    this->addTextureSampler(&fTextureSampler);
    for (int i = 0; i < kernelSize.width() * kernelSize.height(); i++) {
        fKernel[i] = SkScalarToFloat(kernel[i]);
    }
    fKernelOffset[0] = static_cast<float>(kernelOffset.x());
    fKernelOffset[1] = static_cast<float>(kernelOffset.y());
}

GrBicubicEffect::GrBicubicEffect(sk_sp<GrTextureProxy> proxy,
                                 const SkMatrix& matrix,
                                 const SkRect& domain)
        : INHERITED(kGrBicubicEffect_ClassID, ModulateByConfigOptimizationFlags(proxy->config()))
        , fCoordTransform(matrix, proxy.get())
        , fDomain(proxy.get(), domain, GrTextureDomain::kClamp_Mode)
        , fTextureSampler(std::move(proxy)) {
    this->addCoordTransform(&fCoordTransform);
    this->setTextureSamplerCnt(1);
}

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();
}

/*
 *  Modulo internal errors, this should always succeed *if* the matrix is downscaling
 *  (in this case, we have the inverse, so it succeeds if fInvMatrix is upscaling)
 */
bool SkDefaultBitmapControllerState::processMediumRequest(const SkBitmapProvider& provider) {
    SkASSERT(fQuality <= kMedium_SkFilterQuality);
    if (fQuality != kMedium_SkFilterQuality) {
        return false;
    }

    // Our default return state is to downgrade the request to Low, w/ or w/o setting fBitmap
    // to a valid bitmap.
    fQuality = kLow_SkFilterQuality;

    SkSize invScaleSize;
    if (!fInvMatrix.decomposeScale(&invScaleSize, nullptr)) {
        return false;
    }

    SkDestinationSurfaceColorMode colorMode = provider.dstColorSpace()
        ? SkDestinationSurfaceColorMode::kGammaAndColorSpaceAware
        : SkDestinationSurfaceColorMode::kLegacy;
    if (invScaleSize.width() > SK_Scalar1 || invScaleSize.height() > SK_Scalar1) {
        fCurrMip.reset(SkMipMapCache::FindAndRef(provider.makeCacheDesc(), colorMode));
        if (nullptr == fCurrMip.get()) {
            SkBitmap orig;
            if (!provider.asBitmap(&orig)) {
                return false;
            }
            fCurrMip.reset(SkMipMapCache::AddAndRef(orig, colorMode));
            if (nullptr == fCurrMip.get()) {
                return false;
            }
        }
        // diagnostic for a crasher...
        SkASSERT_RELEASE(fCurrMip->data());

        const SkSize scale = SkSize::Make(SkScalarInvert(invScaleSize.width()),
                                          SkScalarInvert(invScaleSize.height()));
        SkMipMap::Level level;
        if (fCurrMip->extractLevel(scale, &level)) {
            const SkSize& invScaleFixup = level.fScale;
            fInvMatrix.postScale(invScaleFixup.width(), invScaleFixup.height());

            // todo: if we could wrap the fCurrMip in a pixelref, then we could just install
            //       that here, and not need to explicitly track it ourselves.
            return fResultBitmap.installPixels(level.fPixmap);
        } else {
            // failed to extract, so release the mipmap
            fCurrMip.reset(nullptr);
        }
    }
    return false;
}

sk_sp<SkImage> SkImage::MakeFromEncoded(sk_sp<SkData> encoded, const SkIRect* subset) {
    if (nullptr == encoded || 0 == encoded->size()) {
        return nullptr;
    }
    SkImageGenerator* generator = SkImageGenerator::NewFromEncoded(encoded.get());
    return SkImage::MakeFromGenerator(generator, subset);
}

sk_sp<SkSpecialImage> SkImageFilter::DrawWithFP(GrContext* context,
                                                sk_sp<GrFragmentProcessor> fp,
                                                const SkIRect& bounds) {
    GrPaint paint;
    paint.addColorFragmentProcessor(fp.get());
    paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode);

    GrSurfaceDesc desc;
    desc.fFlags = kRenderTarget_GrSurfaceFlag;
    desc.fWidth = bounds.width();
    desc.fHeight = bounds.height();
    desc.fConfig = kRGBA_8888_GrPixelConfig;

    sk_sp<GrTexture> dst(context->textureProvider()->createApproxTexture(desc));
    if (!dst) {
        return nullptr;
    }

    sk_sp<GrDrawContext> drawContext(context->drawContext(sk_ref_sp(dst->asRenderTarget())));
    if (!drawContext) {
        return nullptr;
    }

    SkRect srcRect = SkRect::Make(bounds);
    SkRect dstRect = SkRect::MakeWH(srcRect.width(), srcRect.height());
    GrClip clip(dstRect);
    drawContext->fillRectToRect(clip, paint, SkMatrix::I(), dstRect, srcRect);

    return SkSpecialImage::MakeFromGpu(SkIRect::MakeWH(bounds.width(), bounds.height()),
                                       kNeedNewImageUniqueID_SpecialImage,
                                       std::move(dst));
}

sk_sp<SkImage> SkImage_Gpu::onMakeColorSpace(sk_sp<SkColorSpace> colorSpace) const {
    sk_sp<SkColorSpace> srcSpace = fColorSpace ? fColorSpace : SkColorSpace::MakeSRGB();
    auto xform = GrNonlinearColorSpaceXformEffect::Make(srcSpace.get(), colorSpace.get());
    if (!xform) {
        return sk_ref_sp(const_cast<SkImage_Gpu*>(this));
    }

    sk_sp<GrRenderTargetContext> renderTargetContext(fContext->makeRenderTargetContext(
        SkBackingFit::kExact, this->width(), this->height(), kRGBA_8888_GrPixelConfig, nullptr));
    if (!renderTargetContext) {
        return nullptr;
    }

    GrPaint paint;
    paint.setPorterDuffXPFactory(SkBlendMode::kSrc);
    paint.addColorTextureProcessor(fContext->resourceProvider(), fProxy, nullptr, SkMatrix::I());
    paint.addColorFragmentProcessor(std::move(xform));

    const SkRect rect = SkRect::MakeIWH(this->width(), this->height());

    renderTargetContext->drawRect(GrNoClip(), std::move(paint), GrAA::kNo, SkMatrix::I(), rect);

    if (!renderTargetContext->asTextureProxy()) {
        return nullptr;
    }

    // MDB: this call is okay bc we know 'renderTargetContext' was exact
    return sk_make_sp<SkImage_Gpu>(fContext, kNeedNewImageUniqueID,
                                   fAlphaType, renderTargetContext->asTextureProxyRef(),
                                   std::move(colorSpace), fBudgeted);

}

void FatBits::drawLine(SkCanvas* canvas, SkPoint pts[]) {
    SkPaint paint;

    fInverse.mapPoints(pts, 2);

    if (fGrid) {
        apply_grid(pts, 2);
    }

    erase(fMinSurface.get());
    this->setupPaint(&paint);
    paint.setColor(FAT_PIXEL_COLOR);
    if (fUseClip) {
        fMinSurface->getCanvas()->save();
        SkRect r = fClipRect;
        r.inset(SK_Scalar1/3, SK_Scalar1/3);
        fMinSurface->getCanvas()->clipRect(r, kIntersect_SkClipOp, true);
    }
    fMinSurface->getCanvas()->drawLine(pts[0], pts[1], paint);
    if (fUseClip) {
        fMinSurface->getCanvas()->restore();
    }
    this->copyMinToMax();

    SkCanvas* max = fMaxSurface->getCanvas();

    fMatrix.mapPoints(pts, 2);
    this->drawLineSkeleton(max, pts);

    fMaxSurface->draw(canvas, 0, 0, nullptr);
}

void FatBits::drawRect(SkCanvas* canvas, SkPoint pts[2]) {
    SkPaint paint;

    fInverse.mapPoints(pts, 2);

    if (fGrid) {
        apply_grid(pts, 2);
    }

    SkRect r;
    r.set(pts, 2);

    erase(fMinSurface.get());
    this->setupPaint(&paint);
    paint.setColor(FAT_PIXEL_COLOR);
    {
        SkCanvas* c = fMinSurface->getCanvas();
        fRectAsOval ? c->drawOval(r, paint) : c->drawRect(r, paint);
    }
    this->copyMinToMax();

    SkCanvas* max = fMaxSurface->getCanvas();

    fMatrix.mapPoints(pts, 2);
    r.set(pts, 2);
    this->drawRectSkeleton(max, r);

    fMaxSurface->draw(canvas, 0, 0, nullptr);
}

void FatBits::drawTriangle(SkCanvas* canvas, SkPoint pts[3]) {
    SkPaint paint;

    fInverse.mapPoints(pts, 3);

    if (fGrid) {
        apply_grid(pts, 3);
    }

    SkPath path;
    path.moveTo(pts[0]);
    path.lineTo(pts[1]);
    path.lineTo(pts[2]);
    path.close();

    erase(fMinSurface.get());
    this->setupPaint(&paint);
    paint.setColor(FAT_PIXEL_COLOR);
    fMinSurface->getCanvas()->drawPath(path, paint);
    this->copyMinToMax();

    SkCanvas* max = fMaxSurface->getCanvas();

    fMatrix.mapPoints(pts, 3);
    this->drawTriangleSkeleton(max, pts);

    fMaxSurface->draw(canvas, 0, 0, nullptr);
}

sk_sp<SkSurface> SkSurface::MakeFromBackendTextureAsRenderTarget(GrContext* context,
                                                                 const GrBackendTexture& tex,
                                                                 GrSurfaceOrigin origin,
                                                                 int sampleCnt,
                                                                 sk_sp<SkColorSpace> colorSpace,
                                                                 const SkSurfaceProps* props) {
    if (!context) {
        return nullptr;
    }
    if (!SkSurface_Gpu::Valid(context, tex.config(), colorSpace.get())) {
        return nullptr;
    }
    sampleCnt = SkTMax(1, sampleCnt);

    sk_sp<GrRenderTargetContext> rtc(
        context->contextPriv().makeBackendTextureAsRenderTargetRenderTargetContext(
                                                                              tex,
                                                                              origin,
                                                                              sampleCnt,
                                                                              std::move(colorSpace),
                                                                              props));
    if (!rtc) {
        return nullptr;
    }

    sk_sp<SkGpuDevice> device(SkGpuDevice::Make(context, std::move(rtc), tex.width(), tex.height(),
                                                SkGpuDevice::kUninit_InitContents));
    if (!device) {
        return nullptr;
    }
    return sk_make_sp<SkSurface_Gpu>(std::move(device));
}

sk_sp<SkSurface> WindowContext::createSurface(
        sk_sp<GrRenderTarget> rt, int colorBits, bool offscreen, bool forceSRGB) {
    auto flags = (fSurfaceProps.flags() & ~SkSurfaceProps::kGammaCorrect_Flag) |
                 (GrPixelConfigIsSRGB(fPixelConfig) || forceSRGB ?
                  SkSurfaceProps::kGammaCorrect_Flag : 0);
    SkSurfaceProps props(flags, fSurfaceProps.pixelGeometry());

    if (!this->isGpuContext() || colorBits > 24 || offscreen ||
        kRGBA_F16_SkColorType == fDisplayParams.fColorType) {
        // If we're rendering to F16, we need an off-screen surface - the current render
        // target is most likely the wrong format.
        //
        // If we're rendering raster data or using a deep (10-bit or higher) surface, we probably
        // need an off-screen surface. 10-bit, in particular, has strange gamma behavior.
        SkImageInfo info = SkImageInfo::Make(
            fWidth, fHeight,
            fDisplayParams.fColorType,
            kPremul_SkAlphaType,
            forceSRGB ? SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named)
                      : fDisplayParams.fColorSpace
        );
        if (this->isGpuContext()) {
            return SkSurface::MakeRenderTarget(fContext, SkBudgeted::kNo, info,
                                               fDisplayParams.fMSAASampleCount, &props);
        } else {
            return SkSurface::MakeRaster(info, &props);
        }
    } else {
        return SkSurface::MakeRenderTargetDirect(rt.get(), &props);
    }
}

sk_sp<SkSurface> SkSurface::MakeFromBackendRenderTarget(GrContext* context,
                                                        const GrBackendRenderTarget& backendRT,
                                                        GrSurfaceOrigin origin,
                                                        sk_sp<SkColorSpace> colorSpace,
                                                        const SkSurfaceProps* props) {
    if (!context) {
        return nullptr;
    }
    if (!SkSurface_Gpu::Valid(context, backendRT.config(), colorSpace.get())) {
        return nullptr;
    }

    sk_sp<GrRenderTargetContext> rtc(
        context->contextPriv().makeBackendRenderTargetRenderTargetContext(backendRT,
                                                                          origin,
                                                                          std::move(colorSpace),
                                                                          props));
    if (!rtc) {
        return nullptr;
    }

    sk_sp<SkGpuDevice> device(SkGpuDevice::Make(context, std::move(rtc),
                                                backendRT.width(), backendRT.height(),
                                                SkGpuDevice::kUninit_InitContents));
    if (!device) {
        return nullptr;
    }

    return sk_make_sp<SkSurface_Gpu>(std::move(device));
}

void WindowContext::presentRenderSurface(sk_sp<SkSurface> renderSurface, sk_sp<GrRenderTarget> rt,
                                         int colorBits) {
    if (!this->isGpuContext() || colorBits > 24 ||
        kRGBA_F16_SkColorType == fDisplayParams.fColorType) {
        // We made/have an off-screen surface. Get the contents as an SkImage:
        SkImageInfo info = SkImageInfo::Make(fWidth, fHeight,
                                             fDisplayParams.fColorType,
                                             kUnknown_SkAlphaType,
                                             fDisplayParams.fColorSpace);
        SkBitmap bm;
        bm.allocPixels(info);
        renderSurface->getCanvas()->readPixels(&bm, 0, 0);
        SkPixmap pm;
        bm.peekPixels(&pm);
        sk_sp<SkImage> image(SkImage::MakeTextureFromPixmap(fContext, pm,
                             SkBudgeted::kNo));
        GrTexture* texture = as_IB(image)->peekTexture();
        SkASSERT(texture);

        // With ten-bit output, we need to manually apply the gamma of the output device
        // (unless we're in non-gamma correct mode, in which case our data is already
        // fake-sRGB, like we're expected to put in the 10-bit buffer):
        bool doGamma = (colorBits == 30) && SkImageInfoIsGammaCorrect(info);
        fContext->applyGamma(rt.get(), texture, doGamma ? 1.0f / 2.2f : 1.0f);
    }
}