#include <Texture.h>

namespace Texture{
	GLuint loadTexture(const char *fileName){
		SDL_Surface *image = IMG_Load(fileName);

		if(!image)return 0;
		DEBUG_printf("Loaded image file: %s\n", fileName);
		unsigned object = 0; //creates a new unsigned variable for the texture

		glGenTextures(1, &object); //turns "object" into a texture
		glBindTexture(GL_TEXTURE_2D, object); //binds "object" to the top of the stack
		glPixelStoref(GL_UNPACK_ALIGNMENT,1 );

		glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); //sets the "min" filter
		glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); //the the "max" filter of the stack

		glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); //Wrap the texture to the matrix
		glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); //Wrap the texutre to the matrix

		glTexImage2D(	GL_TEXTURE_2D, 
						0, 
					    GL_RGBA,
					    image->w,
					    image->h, 
					    0, 
					    GL_RGBA, 
					    GL_UNSIGNED_BYTE, 
					    image->pixels); //sets the texture to the image file loaded above

		SDL_FreeSurface(image);	//Free surface
		return object;
	}
}

Texturec::Texturec(uint amt, ...){
	image = new GLuint(amt);
	va_list fNames;
	va_start(fNames, amt);
	for(int i = 0; i < amt; i++){
		char* f = va_arg(fNames, char*);
		image[i] = Texture::loadTexture(f);
	}
	va_end(fNames);
}

void Texturec::bind(int bn){
	texState = bn;
	glBindTexture(GL_TEXTURE_2D, image[texState]);
}

void Texturec::bindNext(){
	bind(++texState);
}

void Texturec::bindPrev(){
	bind(--texState);
}

void Texturec::walk(){
	
}