Struct dcv_color_primitives::ImageFormat

source ·

#[repr(C)]pub struct ImageFormat {
    pub pixel_format: PixelFormat,
    pub color_space: ColorSpace,
    pub num_planes: u32,
}

Expand description

Describes how the image data is laid out in memory and its color space.

Note

Not all combinations of pixel format, color space and number of planes describe a valid image format.

Each pixel format has one or more compatible color spaces:

pixel format	color space
`PixelFormat::Argb`	`ColorSpace::Rgb`
`PixelFormat::Bgra`	`ColorSpace::Rgb`
`PixelFormat::Bgr`	`ColorSpace::Rgb`
`PixelFormat::Rgba`	`ColorSpace::Rgb`
`PixelFormat::Rgb`	`ColorSpace::Rgb`
`PixelFormat::I444`	`ColorSpace::Bt601(FR)`, `ColorSpace::Bt709(FR)`
`PixelFormat::I422`	`ColorSpace::Bt601(FR)`, `ColorSpace::Bt709(FR)`
`PixelFormat::I420`	`ColorSpace::Bt601(FR)`, `ColorSpace::Bt709(FR)`
`PixelFormat::Nv12`	`ColorSpace::Bt601(FR)`, `ColorSpace::Bt709(FR)`

Some pixel formats might impose additional restrictions on the accepted number of planes and the image size:

pixel format	subsampling	w	h	#planes	#1	#2	#3
`PixelFormat::Argb`	4:4:4			1	argb:4
`PixelFormat::Bgra`	4:4:4			1	bgra:4
`PixelFormat::Bgr`	4:4:4			1	bgr:3
`PixelFormat::Rgba`	4:4:4			1	rgba:4
`PixelFormat::Rgb`	4:4:4			1	rgb:3
`PixelFormat::I444`	4:4:4			3	y:1	u:1	v:1
`PixelFormat::I422`	4:2:2	2		1, 3	y:1	u:1/2	v:1/2
`PixelFormat::I420`	4:2:0	2	2	3	y:1	u:1/4	v:1/4
`PixelFormat::Nv12`	4:2:0	2	2	1, 2	y:1	uv:1/2

The values reported in columns w and h, when specified, indicate that the described image should have width and height that are multiples of the specified values