images.h/images/drawing.c

#include "images.h"

int image_draw_rect(Image image, int x1, int y1, int x2, int y2, Color color) {
    int retval = 1;
    int y;
    for (; x1 < x2; x1++) {
        for (y = y1; y < y2; y++) {
            if (!image_set_px_c(image, x1, y, color)) retval = 0;
        }
    }

    return retval;
}

int image_draw_circ(Image image, int x, int y, int r, Color color) {
    int retval = 1;
    int i, j, r2 = r * r;
    for (i = -r+1; i < r; i++) {
        for (j = -r+1; j < r; j++) {
            if (i*i + j*j >= r2) continue;
            if (!image_set_px_c(image, x + i, y + j, color)) retval = 0;
        }
    }
    return retval;
}

int image_draw_square(Image image, int x, int y, int size, Color color) {
    int retval = 1;
    int i, j;
    for (i = -size / 2; i <= size / 2; i++) {
        for (j = -size / 2; j <= size / 2; j++) {
            if (!image_set_px_c(image, x + i, y + j, color)) retval = 0;
        }
    }
    return retval;
}