Struct mozjpeg::CompInfo

#[repr(C)]
pub struct CompInfo {
    pub component_id: i32,
    pub component_index: i32,
    pub h_samp_factor: i32,
    pub v_samp_factor: i32,
    pub quant_tbl_no: i32,
    pub dc_tbl_no: i32,
    pub ac_tbl_no: i32,
    pub width_in_blocks: u32,
    pub height_in_blocks: u32,
    pub quant_table: *mut JQUANT_TBL,
    // some fields omitted
}

Fields

component_id: i32

identifier for this component (0..255)

component_index: i32

its index in SOF or cinfo->comp_info[]

h_samp_factor: i32

horizontal sampling factor (1..4)

v_samp_factor: i32

vertical sampling factor (1..4)

quant_tbl_no: i32

quantization table selector (0..3)

dc_tbl_no: i32

DC entropy table selector (0..3)

These values may vary between scans. For compression, they must be supplied by parameter setup; for decompression, they are read from the SOS marker. The decompressor output side may not use these variables.

ac_tbl_no: i32

AC entropy table selector (0..3)

width_in_blocks: u32

height_in_blocks: u32

quant_table: *mut JQUANT_TBL

Trait Implementations

impl Default for jpeg_component_info

fn default() -> jpeg_component_info

Returns the "default value" for a type.

impl CompInfoExt for CompInfo

fn qtable(&self) -> Option<QTable>

fn sampling(&self) -> (u8, u8)

h,v samplinig (1..4). Number of pixels per sample (may be opposite of what you expect!)

fn row_stride(&self) -> usize

Number of pixels per row, including padding to MCU

fn col_stride(&self) -> usize

Total height, including padding to MCU