TSdlChromaLocation

Colorspace chroma sample location.

Definition

type TSdlChromaLocation = (None, Left, Center, TopLeft)

Enumeration Values

`None = SDL_CHROMA_LOCATION_NONE`

RGB, no chroma sampling

`Left = SDL_CHROMA_LOCATION_LEFT`

In MPEG-2, MPEG-4, and AVC, Cb and Cr are taken on midpoint of the left-edge of the 2x2 square. In other words, they have the same horizontal location as the top-left pixel, but is shifted one-half pixel down vertically.

`Center = SDL_CHROMA_LOCATION_CENTER`

In JPEG/JFIF, H.261, and MPEG-1, Cb and Cr are taken at the center of the 2x2 square. In other words, they are offset one-half pixel to the right and one-half pixel down compared to the top-left pixel.

`TopLeft = SDL_CHROMA_LOCATION_TOPLEFT`

In HEVC for BT.2020 and BT.2100 content (in particular on Blu-rays), Cb and Cr are sampled at the same location as the group's top-left Y pixel ("co-sited", "co-located").