C++ (Cpp) FilterEffectRenderer::allocateBackingStoreIfNeeded示例

示例#1

文件： FilterEffectRenderer.cpp 项目： darktears/blink-crosswalk

GraphicsContext* FilterEffectRendererHelper::beginFilterEffect(GraphicsContext* oldContext)
{
    ASSERT(m_renderLayer);

    FilterEffectRenderer* filter = m_renderLayer->filterRenderer();
    filter->allocateBackingStoreIfNeeded();
    // Paint into the context that represents the SourceGraphic of the filter.
    GraphicsContext* sourceGraphicsContext = filter->inputContext();
    if (!sourceGraphicsContext || !FilterEffect::isFilterSizeValid(filter->absoluteFilterRegion())) {
        // Disable the filters and continue.
        m_haveFilterEffect = false;
        return oldContext;
    }

    m_savedGraphicsContext = oldContext;

    // Translate the context so that the contents of the layer is captuterd in the offscreen memory buffer.
    sourceGraphicsContext->save();
    // FIXME: can we just use sourceImageRect for everything, and get rid of
    // m_repaintRect?
    FloatPoint offset = filter->sourceImageRect().location();
    sourceGraphicsContext->translate(-offset.x(), -offset.y());
    sourceGraphicsContext->clearRect(m_repaintRect);
    sourceGraphicsContext->clip(m_repaintRect);

    return sourceGraphicsContext;
}

示例#2

文件： FilterEffectRenderer.cpp 项目： viettrungluu-cr/mojo

GraphicsContext* FilterEffectRendererHelper::beginFilterEffect(GraphicsContext* context)
{
    ASSERT(m_renderLayer);

    FilterEffectRenderer* filter = m_renderLayer->filterRenderer();
    if (m_renderLayer->renderer()->document().settings()->deferredFiltersEnabled()) {
        SkiaImageFilterBuilder builder(context);
        RefPtr<ImageFilter> imageFilter = builder.build(filter->lastEffect().get(), ColorSpaceDeviceRGB);
        if (!imageFilter) {
            m_haveFilterEffect = false;
            return context;
        }
        m_savedGraphicsContext = context;
        context->save();
        FloatRect boundaries = mapImageFilterRect(imageFilter.get(), m_filterBoxRect);
        context->translate(m_filterBoxRect.x(), m_filterBoxRect.y());
        boundaries.move(-m_filterBoxRect.x(), -m_filterBoxRect.y());
        context->beginLayer(1, CompositeSourceOver, &boundaries, ColorFilterNone, imageFilter.get());
        context->translate(-m_filterBoxRect.x(), -m_filterBoxRect.y());
        return context;
    }
    filter->allocateBackingStoreIfNeeded();
    // Paint into the context that represents the SourceGraphic of the filter.
    GraphicsContext* sourceGraphicsContext = filter->inputContext();
    if (!sourceGraphicsContext || !FilterEffect::isFilterSizeValid(filter->absoluteFilterRegion())) {
        // Disable the filters and continue.
        m_haveFilterEffect = false;
        return context;
    }

    m_savedGraphicsContext = context;

    // Translate the context so that the contents of the layer is captuterd in the offscreen memory buffer.
    sourceGraphicsContext->save();
    // FIXME: can we just use sourceImageRect for everything, and get rid of
    // m_paintInvalidationRect?
    FloatPoint offset = filter->sourceImageRect().location();
    sourceGraphicsContext->translate(-offset.x(), -offset.y());
    sourceGraphicsContext->clearRect(m_paintInvalidationRect);
    sourceGraphicsContext->clip(m_paintInvalidationRect);

    return sourceGraphicsContext;
}

示例#3

文件： FilterEffectRenderer.cpp 项目： jfzhang2/webkit

bool FilterEffectRendererHelper::beginFilterEffect()
{
    ASSERT(m_renderLayer);
    
    FilterEffectRenderer* filter = m_renderLayer->filterRenderer();
    filter->allocateBackingStoreIfNeeded();
    // Paint into the context that represents the SourceGraphic of the filter.
    GraphicsContext* sourceGraphicsContext = filter->inputContext();
    if (!sourceGraphicsContext || filter->filterRegion().isEmpty() || ImageBuffer::sizeNeedsClamping(filter->filterRegion().size())) {
        // Disable the filters and continue.
        m_haveFilterEffect = false;
        return false;
    }
    
    // Translate the context so that the contents of the layer is captuterd in the offscreen memory buffer.
    sourceGraphicsContext->save();
    sourceGraphicsContext->translate(-m_paintOffset.x(), -m_paintOffset.y());
    sourceGraphicsContext->clearRect(m_repaintRect);
    sourceGraphicsContext->clip(m_repaintRect);

    m_startedFilterEffect = true;
    return true;
}

示例#4

文件： FilterEffectRenderer.cpp 项目： jiezh/h5vcc

GraphicsContext* FilterEffectRendererHelper::beginFilterEffect(GraphicsContext* oldContext)
{
    ASSERT(m_renderLayer);
    
    FilterEffectRenderer* filter = m_renderLayer->filterRenderer();
    filter->allocateBackingStoreIfNeeded();
    // Paint into the context that represents the SourceGraphic of the filter.
    GraphicsContext* sourceGraphicsContext = filter->inputContext();
    if (!sourceGraphicsContext || !isFilterSizeValid(filter->filterRegion())) {
        // Disable the filters and continue.
        m_haveFilterEffect = false;
        return oldContext;
    }
    
    m_savedGraphicsContext = oldContext;
    
    // Translate the context so that the contents of the layer is captuterd in the offscreen memory buffer.
    sourceGraphicsContext->save();
    sourceGraphicsContext->translate(-m_paintOffset.x(), -m_paintOffset.y());
    sourceGraphicsContext->clearRect(m_repaintRect);
    sourceGraphicsContext->clip(m_repaintRect);
    
    return sourceGraphicsContext;
}