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clients/simple-dmabuf-egl: Add some notes when using direct-display

Marius Vlad requested to merge mvlad/weston:doc-direct-display-simple-egl into master

protocol

As dmabuf uses a different coordinate (top-left) system than OpenGL (bottom-left) using both direct-display with the Y_INVERT dmabuf attrib flag would result in the image being inverted (direct-display will remove the Y_INVERT flag, which caused the image to be displayed correctly). Notifies users that direct-display is in use.

Signed-off-by: Marius Vlad marius.vlad@collabora.com Suggested-by: Pekka Paalanen pekka.paalanen@collabora.com

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