core.gfx.color¶

Colour type definitions and predefined colour constants for kernel graphics.

Overview¶

core.gfx.color defines the packed record types used to represent pixels at different colour depths (32-bit, 24-bit, 16-bit, and 8-bit) and provides a small set of named colour constants for the 32-bit BGRA format. These types are used by the texture, video, and format units throughout the kernel graphics subsystem.

Dependencies¶

None.

Types¶

TRGB32 / PRGB32¶

TRGB32 = bitpacked record
    B : uint8;
    G : uint8;
    R : uint8;
    A : uint8;
end;

32-bit BGRA pixel. Bytes are stored in memory order B, G, R, A. This layout is common for framebuffers and matches the TGA pixel order used by core.fmt.targa.

TRGB24 / PRGB23¶

TRGB24 = bitpacked record
    B : uint8;
    G : uint8;
    R : uint8;
end;

24-bit BGR pixel with no alpha channel. Note: the pointer type is named PRGB23 (a typo in the source; the underlying type is TRGB24).

TRGB16 / PRGB16¶

TRGB16 = bitpacked record
    B : UBit5;
    G : UBit6;
    R : UBit5;
end;

16-bit BGR565 pixel. Blue and red are 5 bits each; green is 6 bits. Used for 16-bit video modes.

TRGB8 / PRGB8¶

TRGB8 = bitpacked record
    B : UBit2;
    G : UBit4;
    R : UBit2;
end;

8-bit packed BGR pixel (2-4-2 bit layout). Used for 8-bit video modes.

Constants¶

The following TRGB32 colour constants are provided:

Name	B	G	R
`black`	0	0	0
`white`	255	255	255
`red`	0	0	255
`green`	0	255	0
`blue`	255	0	0

All constants have an alpha value of 0.

Notes¶

Colour channel order in TRGB32 is BGRA (blue at the lowest byte address), not RGBA. Code that consumes these values as raw 32-bit integers should account for the byte order of the target hardware or framebuffer format.