C++ GrTexture::getContext方法代码示例

    sk_sp<SkSpecialSurface> onMakeSurface(const SkImageInfo& info) const override {
#if SK_SUPPORT_GPU
        GrTexture* texture = as_IB(fImage.get())->peekTexture();
        if (texture) {
            GrSurfaceDesc desc = GrImageInfoToSurfaceDesc(info, *texture->getContext()->caps());
            desc.fFlags = kRenderTarget_GrSurfaceFlag;

            return SkSpecialSurface::MakeRenderTarget(texture->getContext(), desc);
        }
#endif
        return SkSpecialSurface::MakeRaster(info, nullptr);
    }

bool SkBlurImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
                                       SkBitmap* result, SkIPoint* offset) {
#if SK_SUPPORT_GPU
    SkBitmap input;
    if (!SkImageFilterUtils::GetInputResultGPU(getInput(0), proxy, src, ctm, &input, offset)) {
        return false;
    }
    GrTexture* source = input.getTexture();
    SkIRect rect;
    src.getBounds(&rect);
    if (!this->applyCropRect(&rect, ctm)) {
        return false;
    }
    SkAutoTUnref<GrTexture> tex(SkGpuBlurUtils::GaussianBlur(source->getContext(),
                                                             source,
                                                             false,
                                                             SkRect::Make(rect),
                                                             true,
                                                             fSigma.width(),
                                                             fSigma.height()));
    offset->fX += rect.fLeft;
    offset->fY += rect.fTop;
    return SkImageFilterUtils::WrapTexture(tex, rect.width(), rect.height(), result);
#else
    SkDEBUGFAIL("Should not call in GPU-less build");
    return false;
#endif
}

GrTexture* GrTextureAdjuster::refTextureSafeForParams(const GrTextureParams& params,
                                                      SkIPoint* outOffset) {
    GrTexture* texture = this->originalTexture();
    GrContext* context = texture->getContext();
    CopyParams copyParams;
    const SkIRect* contentArea = this->contentAreaOrNull();

    if (contentArea && GrTextureParams::kMipMap_FilterMode == params.filterMode()) {
        // If we generate a MIP chain for texture it will read pixel values from outside the content
        // area.
        copyParams.fWidth = contentArea->width();
        copyParams.fHeight = contentArea->height();
        copyParams.fFilter = GrTextureParams::kBilerp_FilterMode;
    } else if (!context->getGpu()->makeCopyForTextureParams(texture, params, &copyParams)) {
        if (outOffset) {
            if (contentArea) {
                outOffset->set(contentArea->fLeft, contentArea->fRight);
            } else {
                outOffset->set(0, 0);
            }
        }
        return SkRef(texture);
    }

    GrTexture* copy = this->refCopy(copyParams);
    if (copy && outOffset) {
        outOffset->set(0, 0);
    }
    return copy;
}

bool SkBlurImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx,
                                       SkBitmap* result, SkIPoint* offset) const {
#if SK_SUPPORT_GPU
    SkBitmap input = src;
    SkIPoint srcOffset = SkIPoint::Make(0, 0);
    if (getInput(0) && !getInput(0)->getInputResultGPU(proxy, src, ctx, &input, &srcOffset)) {
        return false;
    }
    SkIRect rect;
    if (!this->applyCropRect(ctx, proxy, input, &srcOffset, &rect, &input)) {
        return false;
    }
    GrTexture* source = input.getTexture();
    SkVector sigma = SkVector::Make(fSigma.width(), fSigma.height());
    ctx.ctm().mapVectors(&sigma, 1);
    sigma.fX = SkMinScalar(sigma.fX, MAX_SIGMA);
    sigma.fY = SkMinScalar(sigma.fY, MAX_SIGMA);
    offset->fX = rect.fLeft;
    offset->fY = rect.fTop;
    rect.offset(-srcOffset);
    SkAutoTUnref<GrTexture> tex(SkGpuBlurUtils::GaussianBlur(source->getContext(),
                                                             source,
                                                             false,
                                                             SkRect::Make(rect),
                                                             true,
                                                             sigma.x(),
                                                             sigma.y()));
    WrapTexture(tex, rect.width(), rect.height(), result);
    return true;
#else
    SkDEBUGFAIL("Should not call in GPU-less build");
    return false;
#endif
}

bool SkBicubicImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
                                          SkBitmap* result, SkIPoint* offset) {
    SkBitmap srcBM;
    if (!SkImageFilterUtils::GetInputResultGPU(getInput(0), proxy, src, ctm, &srcBM, offset)) {
        return false;
    }
    GrTexture* srcTexture = srcBM.getTexture();
    GrContext* context = srcTexture->getContext();

    SkRect dstRect = SkRect::MakeWH(srcBM.width() * fScale.fWidth,
                                    srcBM.height() * fScale.fHeight);

    GrTextureDesc desc;
    desc.fFlags = kRenderTarget_GrTextureFlagBit | kNoStencil_GrTextureFlagBit;
    desc.fWidth = SkScalarCeilToInt(dstRect.width());
    desc.fHeight = SkScalarCeilToInt(dstRect.height());
    desc.fConfig = kSkia8888_GrPixelConfig;

    GrAutoScratchTexture ast(context, desc);
    SkAutoTUnref<GrTexture> dst(ast.detach());
    if (!dst) {
        return false;
    }
    GrContext::AutoRenderTarget art(context, dst->asRenderTarget());
    GrPaint paint;
    paint.addColorEffect(GrBicubicEffect::Create(srcTexture, fCoefficients))->unref();
    SkRect srcRect;
    srcBM.getBounds(&srcRect);
    context->drawRectToRect(paint, dstRect, srcRect);
    return SkImageFilterUtils::WrapTexture(dst, desc.fWidth, desc.fHeight, result);
}

bool SkXfermodeImageFilter::filterImageGPU(Proxy* proxy,
                                           const SkBitmap& src,
                                           const Context& ctx,
                                           SkBitmap* result,
                                           SkIPoint* offset) const {
    SkBitmap background = src;
    SkIPoint backgroundOffset = SkIPoint::Make(0, 0);
    if (getInput(0) && !getInput(0)->getInputResultGPU(proxy, src, ctx, &background,
                                                       &backgroundOffset)) {
        return onFilterImage(proxy, src, ctx, result, offset);
    }
    GrTexture* backgroundTex = background.getTexture();
    SkBitmap foreground = src;
    SkIPoint foregroundOffset = SkIPoint::Make(0, 0);
    if (getInput(1) && !getInput(1)->getInputResultGPU(proxy, src, ctx, &foreground,
                                                       &foregroundOffset)) {
        return onFilterImage(proxy, src, ctx, result, offset);
    }
    GrTexture* foregroundTex = foreground.getTexture();
    GrContext* context = foregroundTex->getContext();

    GrFragmentProcessor* xferProcessor = NULL;

    GrSurfaceDesc desc;
    desc.fFlags = kRenderTarget_GrSurfaceFlag | kNoStencil_GrSurfaceFlag;
    desc.fWidth = src.width();
    desc.fHeight = src.height();
    desc.fConfig = kSkia8888_GrPixelConfig;
    SkAutoTUnref<GrTexture> dst(
        context->refScratchTexture(desc, GrContext::kApprox_ScratchTexMatch));
    if (!dst) {
        return false;
    }
    GrContext::AutoRenderTarget art(context, dst->asRenderTarget());

    if (!fMode || !fMode->asFragmentProcessor(&xferProcessor, backgroundTex)) {
        // canFilterImageGPU() should've taken care of this
        SkASSERT(false);
        return false;
    }

    SkMatrix foregroundMatrix = GrCoordTransform::MakeDivByTextureWHMatrix(foregroundTex);
    foregroundMatrix.preTranslate(SkIntToScalar(backgroundOffset.fX-foregroundOffset.fX),
                                  SkIntToScalar(backgroundOffset.fY-foregroundOffset.fY));


    SkRect srcRect;
    src.getBounds(&srcRect);

    GrPaint paint;
    paint.addColorTextureProcessor(foregroundTex, foregroundMatrix);
    paint.addColorProcessor(xferProcessor)->unref();
    context->drawRect(paint, srcRect);

    offset->fX = backgroundOffset.fX;
    offset->fY = backgroundOffset.fY;
    WrapTexture(dst, src.width(), src.height(), result);
    return true;
}

DEF_GPUTEST_FOR_NATIVE_CONTEXT(SkImage_newTextureImage, reporter, context, glContext) {
    GrContextFactory otherFactory;
    GrContextFactory::ContextInfo otherContextInfo =
        otherFactory.getContextInfo(GrContextFactory::kNative_GLContextType);
    glContext->makeCurrent();

    std::function<SkImage*()> imageFactories[] = {
        create_image,
        create_codec_image,
        create_data_image,
        // Create an image from a picture.
        create_picture_image,
        // Create a texture image.
        [context] { return create_gpu_image(context); },
        // Create a texture image in a another GrContext.
        [glContext, otherContextInfo] {
            otherContextInfo.fGLContext->makeCurrent();
            SkImage* otherContextImage = create_gpu_image(otherContextInfo.fGrContext);
            glContext->makeCurrent();
            return otherContextImage;
        }
    };

    for (auto factory : imageFactories) {
        SkAutoTUnref<SkImage> image(factory());
        if (!image) {
            ERRORF(reporter, "Error creating image.");
            continue;
        }
        GrTexture* origTexture = as_IB(image)->peekTexture();

        SkAutoTUnref<SkImage> texImage(image->newTextureImage(context));
        if (!texImage) {
            // We execpt to fail if image comes from a different GrContext.
            if (!origTexture || origTexture->getContext() == context) {
                ERRORF(reporter, "newTextureImage failed.");
            }
            continue;
        }
        GrTexture* copyTexture = as_IB(texImage)->peekTexture();
        if (!copyTexture) {
            ERRORF(reporter, "newTextureImage returned non-texture image.");
            continue;
        }
        if (origTexture) {
            if (origTexture != copyTexture) {
                ERRORF(reporter, "newTextureImage made unnecessary texture copy.");
            }
        }
        if (image->width() != texImage->width() || image->height() != texImage->height()) {
            ERRORF(reporter, "newTextureImage changed the image size.");
        }
        if (image->isOpaque() != texImage->isOpaque()) {
            ERRORF(reporter, "newTextureImage changed image opaqueness.");
        }
    }
}

bool SkImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx,
                                   SkBitmap* result, SkIPoint* offset) const {
#if SK_SUPPORT_GPU
    SkBitmap input = src;
    SkASSERT(fInputCount == 1);
    SkIPoint srcOffset = SkIPoint::Make(0, 0);
    if (!this->filterInputGPU(0, proxy, src, ctx, &input, &srcOffset)) {
        return false;
    }
    GrTexture* srcTexture = input.getTexture();
    SkIRect bounds;
    if (!this->applyCropRect(ctx, proxy, input, &srcOffset, &bounds, &input)) {
        return false;
    }
    SkRect srcRect = SkRect::Make(bounds);
    SkRect dstRect = SkRect::MakeWH(srcRect.width(), srcRect.height());
    GrContext* context = srcTexture->getContext();

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

    SkAutoTUnref<GrTexture> dst(context->textureProvider()->createTexture(desc,
                                      GrTextureProvider::FromImageFilter(ctx.sizeConstraint())));
    if (!dst) {
        return false;
    }

    // setup new clip
    GrClip clip(dstRect);

    GrFragmentProcessor* fp;
    offset->fX = bounds.left();
    offset->fY = bounds.top();
    bounds.offset(-srcOffset);
    SkMatrix matrix(ctx.ctm());
    matrix.postTranslate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top()));
    GrPaint paint;
    if (this->asFragmentProcessor(&fp, srcTexture, matrix, bounds)) {
        SkASSERT(fp);
        paint.addColorFragmentProcessor(fp)->unref();
        paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode);

        SkAutoTUnref<GrDrawContext> drawContext(context->drawContext(dst->asRenderTarget()));
        if (drawContext) {
            drawContext->fillRectToRect(clip, paint, SkMatrix::I(), dstRect, srcRect);

            WrapTexture(dst, bounds.width(), bounds.height(), result);
            return true;
        }
    }
#endif
    return false;
}

GrContext* SkSpecialImage::getContext() const {
#if SK_SUPPORT_GPU
    GrTexture* texture = as_SIB(this)->onPeekTexture();
    
    if (texture) {
        return texture->getContext();
    }
#endif
    return nullptr;
}

    SkSpecialSurface* onNewSurface(const SkImageInfo& info) const override {
#if SK_SUPPORT_GPU
        GrTexture* texture = as_IB(fImage.get())->peekTexture();
        if (texture) {
            GrSurfaceDesc desc = GrImageInfoToSurfaceDesc(info);
            desc.fFlags = kRenderTarget_GrSurfaceFlag;

            return SkSpecialSurface::NewRenderTarget(this->proxy(), texture->getContext(), desc);
        }
#endif
        return SkSpecialSurface::NewRaster(this->proxy(), info, nullptr);
    }

SkSurface* SkImage_Gpu::onNewSurface(const SkImageInfo& info, const SkSurfaceProps& props) const {
    GrTexture* tex = this->getTexture();
    SkASSERT(tex);
    GrContext* ctx = tex->getContext();
    if (!ctx) {
        // the texture may have been abandoned, so we have to check
        return NULL;
    }
    // TODO: Change signature of onNewSurface to take a budgeted param.
    const SkSurface::Budgeted budgeted = SkSurface::kNo_Budgeted;
    return SkSurface::NewRenderTarget(ctx, budgeted, info, fSampleCountForNewSurfaces, &props);
}

GrBackendObject SkImage::getTextureHandle(bool flushPendingGrContextIO) const {
    GrTexture* texture = as_IB(this)->getTexture();
    if (texture) {
        GrContext* context = texture->getContext();
        if (context) {            
            if (flushPendingGrContextIO) {
                context->prepareSurfaceForExternalIO(texture);
            }
        }
        return texture->getTextureHandle();
    }
    return 0;
}

bool SkBlurImageFilter::filterImageGPUDeprecated(Proxy* proxy, const SkBitmap& src,
                                                 const Context& ctx,
                                                 SkBitmap* result, SkIPoint* offset) const {
#if SK_SUPPORT_GPU
    SkBitmap input = src;
    SkIPoint srcOffset = SkIPoint::Make(0, 0);
    if (!this->filterInputGPUDeprecated(0, proxy, src, ctx, &input, &srcOffset)) {
        return false;
    }
    SkIRect srcBounds = input.bounds();
    srcBounds.offset(srcOffset);
    SkIRect dstBounds;
    if (!this->applyCropRect(this->mapContext(ctx), srcBounds, &dstBounds)) {
        return false;
    }
    if (!srcBounds.intersect(dstBounds)) {
        return false;
    }
    SkVector sigma = map_sigma(fSigma, ctx.ctm());
    if (sigma.x() == 0 && sigma.y() == 0) {
        input.extractSubset(result, srcBounds);
        offset->fX = srcBounds.x();
        offset->fY = srcBounds.y();
        return true;
    }
    offset->fX = dstBounds.fLeft;
    offset->fY = dstBounds.fTop;
    srcBounds.offset(-srcOffset);
    dstBounds.offset(-srcOffset);
    SkRect srcBoundsF(SkRect::Make(srcBounds));
    GrTexture* inputTexture = input.getTexture();
    SkAutoTUnref<GrTexture> tex(SkGpuBlurUtils::GaussianBlur(inputTexture->getContext(),
                                                             inputTexture,
                                                             false,
                                                             SkRect::Make(dstBounds),
                                                             &srcBoundsF,
                                                             sigma.x(),
                                                             sigma.y()));
    if (!tex) {
        return false;
    }
    GrWrapTextureInBitmap(tex, dstBounds.width(), dstBounds.height(), false, result);
    return true;
#else
    SkDEBUGFAIL("Should not call in GPU-less build");
    return false;
#endif
}

bool SkImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
                                   SkBitmap* result, SkIPoint* offset) {
#if SK_SUPPORT_GPU
    SkBitmap input;
    SkASSERT(fInputCount == 1);
    if (!SkImageFilterUtils::GetInputResultGPU(this->getInput(0), proxy, src, ctm, &input, offset)) {
        return false;
    }
    GrTexture* srcTexture = input.getTexture();
    SkIRect bounds;
    src.getBounds(&bounds);
    if (!this->applyCropRect(&bounds, ctm)) {
        return false;
    }
    SkRect srcRect = SkRect::Make(bounds);
    SkRect dstRect = SkRect::MakeWH(srcRect.width(), srcRect.height());
    GrContext* context = srcTexture->getContext();

    GrTextureDesc desc;
    desc.fFlags = kRenderTarget_GrTextureFlagBit,
    desc.fWidth = bounds.width();
    desc.fHeight = bounds.height();
    desc.fConfig = kRGBA_8888_GrPixelConfig;

    GrAutoScratchTexture dst(context, desc);
    GrContext::AutoMatrix am;
    am.setIdentity(context);
    GrContext::AutoRenderTarget art(context, dst.texture()->asRenderTarget());
    GrContext::AutoClip acs(context, dstRect);
    GrEffectRef* effect;
    SkMatrix matrix(ctm);
    matrix.postTranslate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top()));
    this->asNewEffect(&effect, srcTexture, matrix, bounds);
    SkASSERT(effect);
    SkAutoUnref effectRef(effect);
    GrPaint paint;
    paint.addColorEffect(effect);
    context->drawRectToRect(paint, dstRect, srcRect);

    SkAutoTUnref<GrTexture> resultTex(dst.detach());
    SkImageFilterUtils::WrapTexture(resultTex, bounds.width(), bounds.height(), result);
    offset->fX += bounds.left();
    offset->fY += bounds.top();
    return true;
#else
    return false;
#endif
}

bool SkBlurImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx,
                                       SkBitmap* result, SkIPoint* offset) const {
#if SK_SUPPORT_GPU
    SkBitmap input = src;
    SkIPoint srcOffset = SkIPoint::Make(0, 0);
    if (!this->filterInputGPU(0, proxy, src, ctx, &input, &srcOffset)) {
        return false;
    }
    SkIRect srcBounds, dstBounds;
    if (!this->applyCropRect(this->mapContext(ctx), input, srcOffset, &dstBounds, &srcBounds)) {
        return false;
    }
    if (!srcBounds.intersect(dstBounds)) {
        return false;
    }
    GrTexture* source = input.getTexture();
    SkVector sigma = mapSigma(fSigma, ctx.ctm());
    offset->fX = dstBounds.fLeft;
    offset->fY = dstBounds.fTop;
    srcBounds.offset(-srcOffset);
    dstBounds.offset(-srcOffset);
    SkRect srcBoundsF(SkRect::Make(srcBounds));
    auto constraint = GrTextureProvider::FromImageFilter(ctx.sizeConstraint());
    SkAutoTUnref<GrTexture> tex(SkGpuBlurUtils::GaussianBlur(source->getContext(),
                                                             source,
                                                             false,
                                                             SkRect::Make(dstBounds),
                                                             &srcBoundsF,
                                                             sigma.x(),
                                                             sigma.y(),
                                                             constraint));
    if (!tex) {
        return false;
    }
    WrapTexture(tex, dstBounds.width(), dstBounds.height(), result);
    return true;
#else
    SkDEBUGFAIL("Should not call in GPU-less build");
    return false;
#endif
}