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This is minor step toward removing libdrm from rendercopy. Lets add new functions and structure fields to verify we don't introduce regressions in already migrated code. Some utility functions - write buf/aux (ccs) to png were added. Signed-off-by: Zbigniew Kempczyński <zbigniew.kempczynski@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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