images.h/main.c

#include <stdlib.h>
#include <stdio.h>
#include "images/images.h"

void test_transparency();
void test_4k_gradient();

int main(int argc, char* argv[]) {
    test_transparency();
    test_4k_gradient();
}

void test_transparency() {
    Image img;
    Color white = color_new(255,255,255);
    Color green = color_new(0,255,0);
    Color blue = color_new(30,50,210);
    Color black = color_new(0,0,0);

    image_new(512, 512, &img);

    // make it white
    image_draw_rect(img, 0, 0, 512, 512, white);

    // draw some circs
    blue.alpha = 0.5;
    image_draw_circ(img, 255,255, 100, blue);
    image_draw_circ(img, 255,155, 100, blue);
    image_draw_circ(img, 255,355, 100, blue);
    green.alpha = .6;
    image_draw_circ(img, 255, 255, 12, green);

    // draw a couple of rects
    black.alpha = 0.5;
    white.alpha = 0.5;
    image_draw_square(img, 200, 255, 111, black);
    image_draw_square(img, 200, 255, 101, white);

    if (!image_save_bmp(img, "test-transparency.bmp")) {
        printf("error writing file!\n");
    } else {
        printf("writing finished\n");
    }

    image_destroy(img);
}

void test_4k_gradient() {
    printf("allocating image\n");
    Image img;
    image_new(1920 * 4,1080 * 4, &img);

    printf("writing pixies\n");

    for (int i = 0; i < 1920 * 4; i++) {
        for (int j = 0; j < 1080 * 4; j++) {
            float color = (j / (1080.0f * 4)) * 255;
            image_set_px(img, i, j, (int) color, 255, 255);
        }
    }

    printf("writing file to disk\n");

    if (!image_save_bmp(img, "test-4k.bmp")) {
        printf("error writing file!\n");
    } else {
        printf("writing finished\n");
    }
    image_destroy(img);
    printf("image destroyed\n");
}