Struct RgbaImage 

pub struct RgbaImage {
    pub width: u32,
    pub height: u32,
    pub pixels: Vec<u8>,
}

RGBA, 8 bits per channel, straight (not premultiplied) alpha.

Fields

width: u32

Width in pixels.

height: u32

Height in pixels.

pixels: Vec<u8>

width * height * 4 bytes, rows top to bottom, R G B A.

Implementations

impl RgbaImage

pub fn new(width: u32, height: u32) -> Self

A transparent image.

pub fn fill(&mut self, pixel: [u8; 4])

Sets every pixel to pixel (RGBA).

pub fn pixel(&self, x: u32, y: u32) -> [u8; 4]

The RGBA pixel at (x, y). Panics outside the image.

pub fn set_pixel(&mut self, x: u32, y: u32, pixel: [u8; 4])

Sets the RGBA pixel at (x, y). Panics outside the image.

pub fn row_mut(&mut self, y: u32) -> &mut [u8]

The bytes of row y.

pub fn alpha_bbox(&self) -> Option<(u32, u32, u32, u32)>

Bounding box (x0, y0, x1, y1, exclusive ends) of the pixels with alpha.

pub fn resize_area(&self, width: u32, height: u32) -> RgbaImage

Shrink to width×height with an area (box) filter on premultiplied colour.

pub fn halve(&self) -> RgbaImage

Halve with a 2×2 box on premultiplied colour (width and height rounded down).

pub fn paste(&mut self, other: &RgbaImage, x: i64, y: i64)

Copy other onto self with its top-left at (x, y), replacing pixels (no blending); parts outside are dropped.

pub fn draw_over(&mut self, other: &RgbaImage, x: i64, y: i64)

Draw other over self (normal blending, straight alpha) with its top-left at (x, y); parts outside are dropped.

pub fn to_png(&self) -> Result<Vec<u8>>

Encodes as an 8-bit RGBA PNG.

pub fn from_png(data: &[u8]) -> Result<Self>

Decodes a PNG (any colour type; converted to RGBA).

Trait Implementations

impl Clone for RgbaImage

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for RgbaImage

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for RgbaImage

impl PartialEq for RgbaImage

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for RgbaImage