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Both types are already binary equal: both are enums using the same bit values, but from compiler's perspective they're still different types, so it's warning. > ../glamor/glamor_trapezoid.c:123:47: warning: implicit conversion from > enumeration type 'PictFormatShort' (aka 'enum _PictFormatShort') to different > enumeration type 'pixman_format_code_t' [-Wenum-conversion] > 123 | image = pixman_image_create_bits(picture->format, > | ~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~^~~~~~ > 1 warning generated. The PICT_* fields, values and macros are relics from pre-pixman days (pixman, historically, essentially is the PICT_* stuff moved out to separate library) This has been a practical way for doing the transition from the old internal PICT_* code to pixman. Now it's time to finish it all up and drop the extra glue layer. In order to make it smooth, and also providing backwards compatibility for drivers (until they all keep up), just aliasing the types and adding #define's for the enum values. Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>