/*
 * Copyright © 2012 Ian D. Romanick
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */
#include <stdarg.h>
#include <GL/glew.h>
#include <glu3.h>
#include "shader.h"

void shader_program::init()
{
	this->program = glCreateProgram();
	this->log = 0;
}

shader_program::shader_program()
{
	init();
}

shader_program::shader_program(GLint shader, ...)
{
	va_list ap;
	GLint sh;

	init();

	glAttachShader(this->program, shader);

	va_start(ap, shader);
	while ((sh = va_arg(ap, GLint)) != 0) {
		glAttachShader(this->program, sh);
	}
	va_end(ap);
}

shader_program::~shader_program()
{
	glDeleteProgram(this->program);
	this->program = 0;

	if (this->log) {
		gluReleaseInfoLog(this->log);
		this->log = 0;
	}
}

bool shader_program::link()
{
	return gluLinkProgram(this->program, &this->log);
}