本文整理汇总了C++中nsRefPtr::CreateDrawTarget方法的典型用法代码示例。如果您正苦于以下问题：C++ nsRefPtr::CreateDrawTarget方法的具体用法？C++ nsRefPtr::CreateDrawTarget怎么用？C++ nsRefPtr::CreateDrawTarget使用的例子？那么恭喜您, 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nsRefPtr的用法示例。
在下文中一共展示了nsRefPtr::CreateDrawTarget方法的1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:
already_AddRefed<DrawTarget>
nsShmImage::EnsureShmImage(const gfxIntSize& aSize,
Display* aDisplay, Visual* aVisual, unsigned int aDepth,
nsRefPtr<nsShmImage>& aImage)
{
if (!aImage || aImage->Size() != aSize) {
// Because we XSync() after XShmAttach() to trap errors, we
// know that the X server has the old image's memory mapped
// into its address space, so it's OK to destroy the old image
// here even if there are outstanding Puts. The Detach is
// ordered after the Puts.
aImage = nsShmImage::Create(aSize, aDisplay, aVisual, aDepth);
}
return !aImage ? nullptr : aImage->CreateDrawTarget();
}