Struct bmp::Image

pub struct Image { /* fields omitted */ }

The image type provided by the library.

It exposes functions to initialize or read BMP images from disk, common modification of pixel data, and saving to disk.

The image is accessed in row-major order from top to bottom, where point (0, 0) is defined to be in the upper left corner of the image.

Currently, only uncompressed BMP images are supported.

Methods

impl Image

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

Returns a new BMP Image with the width and height specified. It is initialized to a black image by default.

Example

let mut img = bmp::Image::new(100, 80);

pub fn get_width(&self) -> u32

Returns the width of the Image.

pub fn get_height(&self) -> u32

Returns the height of the Image.

pub fn set_pixel(&mut self, x: u32, y: u32, val: Pixel)

Set the pixel value at the position of width and height.

Example

let mut img = bmp::Image::new(100, 80);
img.set_pixel(10, 10, bmp::consts::RED);

pub fn get_pixel(&self, x: u32, y: u32) -> Pixel

Returns the pixel value at the position of width and height.

Example

let img = bmp::Image::new(100, 80);
assert_eq!(bmp::consts::BLACK, img.get_pixel(10, 10));

Important traits for ImageIndex

impl Iterator for ImageIndex type Item = (u32, u32);

pub fn coordinates(&self) -> ImageIndex

Returns a new ImageIndex that iterates over the image dimensions in top-bottom order.

Example

let mut img = bmp::Image::new(100, 100);
for (x, y) in img.coordinates() {
    img.set_pixel(x, y, bmp::consts::BLUE);
}

pub fn save<P: AsRef<Path>>(&self, path: P) -> Result<()>

Saves the Image instance to the path specified by path. The function will overwrite the contents if a file already exists at the given path.

The function returns the io::Result from the underlying writer.

Example

use bmp::Image;

let mut img = Image::new(100, 100);
let _ = img.save("black.bmp").unwrap_or_else(|e| {
    panic!("Failed to save: {}", e)
});

pub fn to_writer<W: Write>(&self, destination: &mut W) -> Result<()>

Writes the Image instance to the writer referenced by destination.

Trait Implementations

impl Clone for Image

fn clone(&self) -> Image

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Eq for Image

impl PartialEq for Image

fn eq(&self, __arg_0: &Image) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, __arg_0: &Image) -> bool

This method tests for !=.

impl Debug for Image

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

Formats the value using the given formatter.