#include <SDL.h>
#include <SDL_image.h>
#include "../logging.h"
#include "image.h"
#include "resource.h"

struct resource_table img_res;

struct image *
img_png_get(const char *path)
{
	SDL_RWops *rwops;
	struct image *img;

	img = (struct image *) resource_get(&img_res, path);
	if (img != NULL) {
		resource_use((struct resource *) img);
		return img;
	}

	img = resource_alloc(path, sizeof(*img));
	rwops = SDL_RWFromFile(path, "rb");
	img->image = IMG_LoadPNG_RW(rwops);
	if (!img->image) {
		err(1, "Failed to load image \"%s\" (%s)",
				path, IMG_GetError());
	}

	resource_use((struct resource *) img);
	resource_add(&img_res, path, (struct resource *) img);

	return img;
}

void
img_png_free(struct image *image)
{
	SDL_Surface *data;

	if (image == NULL) {
		return;
	}

	data = image->image;
	if (resource_free(&img_res, (struct resource *) image)) {
		SDL_FreeSurface(data);
	}
}