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If a KMS device has the DRM_CAP_DUMB_PREFER_SHADOW and a software based GL driver is used, always use a shadow fb. This will speed up read backs in the llvmpipe OpenGL implementation, making blend operations faster. Fixes: #106
173867c1
If a KMS device has the DRM_CAP_DUMB_PREFER_SHADOW and a software based GL driver is used, always use a shadow fb. This will speed up read backs in the llvmpipe OpenGL implementation, making blend operations faster. Fixes: #106