Struct lodepng::ffi::ColorProfile

#[repr(C)]
pub struct ColorProfile {
    pub colored: c_uint,
    pub key: c_uint,
    pub key_r: u16,
    pub key_g: u16,
    pub key_b: u16,
    pub alpha: c_uint,
    pub numcolors: c_uint,
    pub palette: [RGBA; 256],
    pub bits: c_uint,
}

Gives characteristics about the colors of the image, which helps decide which color model to use for encoding. Used internally by default if "auto_convert" is enabled. Public because it's useful for custom algorithms.

Fields

colored: c_uint

not greyscale

key: c_uint

image is not opaque and color key is possible instead of full alpha

key_r: u16

key values, always as 16-bit, in 8-bit case the byte is duplicated, e.g. 65535 means 255

key_g: u16

key_b: u16

alpha: c_uint

image is not opaque and alpha channel or alpha palette required

numcolors: c_uint

amount of colors, up to 257. Not valid if bits == 16.

palette: [RGBA; 256]

Remembers up to the first 256 RGBA colors, in no particular order

bits: c_uint

bits per channel (not for palette). 1,2 or 4 for greyscale only. 16 if 16-bit per channel required.

Methods

impl ColorProfile

pub fn new() -> Self