#include "OnlyOnce.hpp"
/*
#include <GL/glew.h>
*/


extern "C" {
	#ifndef STB_IMAGE_IMPLEMENTATION
	#define STB_IMAGE_IMPLEMENTATION
	#endif // !STB_IMAGE_IMPLEMENTATION
	#include "stb_image.h"
}

GLuint loadImg(const char* path) {
	GLuint texture;
	int width, height, nrChannels;
	GLenum format;
	unsigned char* data;

	glGenTextures(1, &texture);
	glActiveTexture(GL_TEXTURE0);
	glBindTexture(GL_TEXTURE_2D, texture);
	//Gestione minification e magnification
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

	data = stbi_load(path, &width, &height, &nrChannels, 0);
	if (data)
	{

		if (nrChannels == 3)
			format = GL_RGB;

		if (nrChannels == 4)
			format = GL_RGBA;

		glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, format, GL_UNSIGNED_BYTE, data);
		glGenerateMipmap(GL_TEXTURE_2D);
		printf("Tutto OK %d %d \n", width, height);
	}
	else
	{
		printf("LoadImage Errore nel caricare la texture\n");
		printf("%s\n", stbi_failure_reason());
	}
	stbi_image_free(data);
	glBindTexture(GL_TEXTURE_2D, 0);

	return texture;
}