lbm.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "gfx.h"

#define MAXCOLOR 255

void show_pixels(struct gfx_context_t* context, int nx, int ny) {
    gfx_clear(context, COLOR_BLACK);

    for(int ix = 0; ix < nx; ++ix) {
		for(int iy = 0; iy < ny; ++iy){
            int px = rand() % MAXCOLOR;

            uint32_t color = MAKE_COLOR(px, px, px);

            gfx_putpixel(context, ix, iy, color);
        }
    }
    gfx_present(context);
}

int main()
{ 
    int nx = 600;
    int ny = 400;
    struct gfx_context_t* context = gfx_create("Random Image", nx, ny);
    if (!context) {
        fprintf(stderr, "Graphic mode initialization failed!\n");
        EXIT_FAILURE;
    }

    SDL_ShowCursor(SDL_ENABLE); // needed to se the cursor
    SDL_Keycode key_pressed = 0; // escape keyy needed

    int max_iter = 100000;

    int it = 0;
    point p;
    while (it < max_iter) { // press escape to exit the loop
        SDL_PumpEvents();

        key_pressed = gfx_keypressed();
        if (key_pressed == SDLK_ESCAPE) {
            break;
        }

        show_pixels(context, nx, ny);
        int id = gfx_left_right_mouse_pressed(&p);
        if (id) {
            printf("A valid mouse clic was performed.\n");
        }

        it += 1;
    }

	return EXIT_SUCCESS;
}