"Nascar Jacket" Generator, which I wrote to make an image for my MAGFest 2016 slides

jacket.c

/* "Nascar Jacket" Image Generator
 * Written by Ethan "flibitijibibo" Lee
 *
 * Released under public domain.
 * No warranty implied, use at your own risk.
 *
 * Directions:
 * - Grab a bunch of header.jpg files from Steam store pages
 * - Line them up in zero-indexed numerical order (0.jpg, 1.jpg, ...)
 * - Edit the defines below to get the jacket you want
 * - `cc jacket.c -lSDL2 -lSDL2_image`
 * - ./a.out
 * - Enjoy jacket.png!
 */

#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>

#define NUM_IMG 35
#define FINAL_W 5
#define FINAL_H 7
#define IMAGE_W 460
#define IMAGE_H 215

int main(int argc, char **argv)
{
	SDL_Surface *finalImg;
	SDL_Surface *curImg;
	SDL_Rect region;
	char path[7];
	Uint8 i;

	finalImg = SDL_CreateRGBSurface(
		0,
		IMAGE_W * FINAL_W,
		IMAGE_H * FINAL_H,
		32,
		0x000000FF,
		0x0000FF00,
		0x00FF0000,
		0xFF000000
	);
	region.x = 0;
	region.y = 0;
	region.w = IMAGE_W;
	region.h = IMAGE_H;
	for (i = 0; i < NUM_IMG; i += 1)
	{
		SDL_snprintf(path, sizeof(path), "%i.jpg", i);
		curImg = IMG_Load(path);
		SDL_BlitSurface(curImg, NULL, finalImg, &region);
		SDL_FreeSurface(curImg);
		region.x += IMAGE_W;
		if (region.x >= finalImg->w)
		{
			region.x = 0;
			region.y += IMAGE_H;
		}
	}
	IMG_SavePNG(finalImg, "jacket.png");
	SDL_FreeSurface(finalImg);
	return 0;
}