/* SPDX-License-Identifier: GPL-3.0-or-later */
/* Copyright (C) 2021 KikooDX */

#include "particles.h"
#include <libimg.h>

extern struct Particle particles[MAX_PARTICLES];

void
particles_draw(void)
{
	int i = MAX_PARTICLES;
	while (i-- > 0)
		particle_draw(particles[i]);
}

void
particle_draw(struct Particle particle)
{
	if (!particle.life)
		return;

	/* create image to apply transformations on */
	/* alloc */
	const img_t transformed_img =
	    img_create(particle.frame_width, particle.frame_height);
	/* check */
	if (img_null(transformed_img))
		return;

	/* fill image with transparent */
	img_fill(transformed_img, IMG_ALPHA);

	/* get frame subimage */
	const img_t frame_simg =
	    img_sub(*particle.texture, particle.frame * particle.frame_width, 0,
	            particle.frame_width, particle.frame_height);

	/* apply transformations if needed */
	if (particle.flip_h)
		img_hflip(frame_simg, transformed_img);
	else
		img_render(frame_simg, transformed_img);

	/* render image */
	img_render_vram(transformed_img, particle.x, particle.y);

	/* free */
	img_destroy(transformed_img);
}