RAYLIB: Image_to_ASCII Basic Implementation (with color)

image_to_ascii.c

#include <stdio.h>
#include "raylib.h"

char asciiChars[] = {'@', '#', 'S', '%', '?', '*', '+', ';', ':', ',', '.'};

int windowWidth = 1024;
int windowHeight = 780;

int imageResizeValue = 100;

int fontSize = 10;

char getAsciiChar(Color color) {
    // Convert color to grayscale
    float grayscale = 0.299 * color.r + 0.587 * color.g + 0.114 * color.b;
    int index = (int)(grayscale / 255.0 * (sizeof(asciiChars) - 1));
    return asciiChars[index];
}

int main() {
    InitWindow(windowWidth, windowHeight, "SPACE MARINE IN ASCII");
    Image image = LoadImage("space_marine.png");                            // Use your own image
    ImageResize(&image, imageResizeValue, imageResizeValue);
    Color *pixels = LoadImageColors(image);

    while (!WindowShouldClose()) {
        BeginDrawing();
        ClearBackground(ASCBLACK);

        int width = imageResizeValue;
        int height = imageResizeValue;

        for (int y = 0; y < height; y++) {
            for (int x = 0; x < width; x++) {
                Color pixelColor = pixels[y * width + x];
                char asciiChar = getAsciiChar(pixelColor);
                
                char str[2] = {asciiChar, '\0'};
                
                DrawText(str, x * fontSize, y * fontSize, fontSize, pixelColor);
            }
        }

        EndDrawing();
    }

    UnloadImage(image);   
    CloseWindow();        

    return 0;
}