I do not understand BltPixel's definition about uefi-rs

[GabrielMajeri]

I haven't even read that part of the spec.

I just scrolled down a few pages to the EFI_GRAPHICS_OUTPUT_PROTOCOL.Blt() section and found this:

typedef struct {
UINT8 Blue;
UINT8 Green;
UINT8 Red;
UINT8 Reserved;
} EFI_GRAPHICS_OUTPUT_BLT_PIXEL;

I'm a simple person, I see a structure definition, I copy it :)

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But in all seriousness, BGRA is what modern GPUs use internally, due to the legacy of Windows' GDI, so it wouldn't even make sense to expose a buffer in RGBA or ABGR order.

I'm guessing either the UEFI spec got the wording wrong, or when they say "byte 0" they mean "the byte indicated by the first element of the EFI_PIXEL_BITMASK structure".

[HadrienG2]

Yeah, my first spec bug! 😄 Reported to the UEFI forum, thanks for the explanation.