Crate wml2 

Multi-format image decoding and encoding for RGBA buffers.

wml2 exposes a callback-based decoding API in draw and built-in buffer-backed helpers via draw::ImageBuffer. The crate can decode still images and animations into RGBA buffers, preserve metadata, and encode BMP, GIF, JPEG, PNG/APNG, TIFF, and WebP output.

Example

use wml2::draw::*;
use wml2::metadata::DataMap;
use std::error::Error;
use std::env;

pub fn main()-> Result<(),Box<dyn Error>> {
    let args: Vec<String> = env::args().collect();
    if args.len() < 2 {
        println!("usage: metadata <inputfilename>");
        return Ok(())
    }

    let filename = &args[1];
    let mut image = image_from_file(filename.to_string())?;
    let metadata = image.metadata()?;
    if let Some(metadata) = metadata {
        for (key,value) in metadata {
            match value {
                DataMap::None => {
                    println!("{}",key);
                },
                DataMap::Raw(value) => {
                    println!("{}: {}bytes",key,value.len());
                },
                DataMap::Ascii(string) => {
                    println!("{}: {}",key,string);
                },
                DataMap::Exif(value) => {
                    println!("=============== EXIF START ==============");
                    let string = value.to_string();
                    println!("{}", string);
                    println!("================ EXIF END ===============");
                },
                DataMap::ICCProfile(data) => {
                    println!("{}: {}bytes",key,data.len());
                },
                _ => {
                    println!("{}: {:?}",key,value);
                }
            }
        }        
    }
    Ok(())
}

Modules

bmp

BMP format support.

color

RGB and RGBA color primitives used across decoders and encoders.

decoder

Shared low-level decoder utilities.

draw

Callback-based image I/O primitives and the default RGBA image buffer.

encoder

Shared low-level encoder utilities.

error

Error types returned by decoders, encoders, and helpers.

gif

GIF format support.

ico

ICO decoder implementation.

jpeg

JPEG format support.

mag

MAG format support.

maki

MAKI format support.

metadata

Metadata value types shared by image decoders and encoders.

pcd

Photo CD format support.

pi

PI format support.

pic

PIC format support.

png

PNG and APNG format support.

tiff

TIFF format support, including EXIF-oriented metadata parsing.

util

Format detection helpers and shared image format identifiers.

vsp

VSP format support.

warning

Warning aggregation traits and container types.

webp

WebP support backed by the standalone webp-rust codec crate.

Functions

get_can_decode

get_can_decode get WML2 crate decoder header check

get_decoder_extentions

get_decoder_extentions get extentions of WML2’s decoders

get_encode_extentions

get_encode_extentions get extentions of WML2’s encoders

get_version

get_version get WML2 crate version