Module color 

Color types and operations.

Port of agg_color_rgba.h, agg_color_rgba.cpp, and agg_color_gray.h.

Provides RGBA and grayscale color types at different precisions:

• Rgba — f64 components (linear working space)
• Rgba8 — u8 components (8-bit per channel)
• Rgba16 — u16 components (16-bit per channel)
• Gray8 — u8 grayscale + alpha
• Gray16 — u16 grayscale + alpha

Note: sRGB colorspace variants (srgba8, sgray8) from the C++ code are not included in Phase 1. They will be added when needed (they require sRGB lookup table infrastructure).

Structs

Gray8

Grayscale color with u8 components (value + alpha). Port of C++ gray8T<linear>.

Gray16

Grayscale color with u16 components (value + alpha). Port of C++ gray16.

OrderAbgr

ABGR component order: A=0, B=1, G=2, R=3

OrderArgb

ARGB component order: A=0, R=1, G=2, B=3

OrderBgr

BGR component order: B=0, G=1, R=2

OrderBgra

BGRA component order: B=0, G=1, R=2, A=3

OrderRgb

RGB component order: R=0, G=1, B=2

OrderRgba

RGBA component order: R=0, G=1, B=2, A=3

Rgba

RGBA color with f64 components in range [0, 1]. Port of C++ rgba.

Rgba8

RGBA color with u8 components. Port of C++ rgba8T<linear> (linear colorspace variant).

Rgba16

RGBA color with u16 components. Port of C++ rgba16.

Functions

argb8_packed

Create an Rgba8 from a packed ARGB value (0xAARRGGBB).

bgr8_packed

Create an Rgba8 from a packed BGR value (0xBBGGRR).

rgb8_packed

Create an Rgba8 from a packed RGB value (0xRRGGBB).

rgba_pre

Create a pre-multiplied Rgba color.