pixfmt.c

//
// Created by ndraey on 10.09.23.
//
 
#include "sys/pixfmt.h"
 
void pixfmt_conv(char* pixels, size_t bpp, size_t width, size_t height, koraidon_screen_pixfmt_t input_format, koraidon_screen_pixfmt_t output_format) {
    if(input_format == output_format) {
        return;
    }
 
    size_t bytes_pp = bpp >> 3;
 
    bool in_rgb = input_format == SCREEN_RGB;
    bool in_bgr = input_format == SCREEN_BGR;
 
    bool out_rgb = output_format == SCREEN_RGB;
    bool out_bgr = output_format == SCREEN_BGR;
 
    for(size_t sy = 0; sy < height; sy++) {
        for(size_t sx = 0; sx < width; sx++) {
            size_t coords = (sy * (width * bytes_pp)) + (sx * bytes_pp);
 
            if((in_rgb && out_bgr) || (out_rgb && in_bgr)) {
                char pixel = pixels[coords + 2]; // r / b
                pixels[coords + 2] = pixels[coords + 0]; // b / r
                pixels[coords + 0] = pixel;
            }
        }
    }
}