image.h

Example:

/* Example of using image.h with standard PNG file... */

#define IMAGE_IMPLEMENTATION
#include "image.h"

int main(void) {
    int width = 0, height = 0;

    char *image = imageLoadPNG("image.png", &width, &height);

    /* ... */

    free(image);
}

Resources:

• PNG (Portable Network Graphics) Specification, Version 1.2

• Writing a (simple) PNG decoder might be easier than you think

• PNG - Wikipedia

• Implementing a Basic PNG reader the handmade way

• How PNG Works: Compromising Speed for Quality - Reducible

• Deflate (zlib) compressed data format

• Understanding zlib

• Let's implement zlib.decompress()

• PPM - Netpbm color image format

• Portable anymap