Commit 1495ba9e authored by Committed by Zhigang Gong
glamor: Use buffer object as much as possible.
Change the row length of 1bit color depth pixmap to the actual stride. The previous implementation use the width as its stride which is not good. As it will waste 8 times of space and also bring some non-unify code path. With this commit, we can merge those 1bit or other color depth to almost one code path. And we will use pixel buffer object as much as possible due to performance issue. By default, some mesa hardware driver will fallback to software rasterization when use glReadPixels on a non-buffer-object frame buffer. This change will get about 4x times performance improvemention when we use y-inverted glamor or the driver support hardware y-flipped blitting.
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