本文整理汇总了C++中FilterEffectRenderer::filterRegion方法的典型用法代码示例。如果您正苦于以下问题：C++ FilterEffectRenderer::filterRegion方法的具体用法？C++ FilterEffectRenderer::filterRegion怎么用？C++ FilterEffectRenderer::filterRegion使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类FilterEffectRenderer的用法示例。
在下文中一共展示了FilterEffectRenderer::filterRegion方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: beginFilterEffect
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2: beginFilterEffect
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;
}