/**

 * ShaderShark

 * Copyright © 2023 František Kučera (Frantovo.cz, GlobalCode.info)

 *

 * This program is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, version 3 of the License.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program. If not, see <http://www.gnu.org/licenses/>.

 */

#pragma once

#include <string>

#include <stdexcept>

#include <epoxy/gl.h>

#include <epoxy/glx.h>

#include <GL/glu.h>

#include <glm/glm.hpp>

#include <glm/ext.hpp>

inline

void quads(GLfloat tx, GLfloat ty, GLfloat x, GLfloat y, GLfloat z) {

	glTexCoord2f(tx, ty);

	glVertex3f(x, y, z);

}

inline

void checkError(std::ostream* out) {

	GLenum code = glGetError();

	if (code == GL_NO_ERROR) {

		if (out) *out << "GL check: OK" << std::endl;

	} else {

		const char* string = (const char*) gluErrorString(code);

		if (out) *out << "GL check: " << string << std::endl;

		else throw std::logic_error(std::string("GL error: ") + string);

	}

}

inline

GLenum toShaderType(const std::string& fileName) {

	if (fileName.ends_with(".vert")) return GL_VERTEX_SHADER;

	else if (fileName.ends_with(".frag")) return GL_FRAGMENT_SHADER;

	else throw std::invalid_argument("Expecting *.vert or *.frag file");

}

inline

void dump(const char* name, const glm::vec3& value) {

	std::cerr << "dump: " << name << " = ["

			<< value.x << ", "

			<< value.y << ", "

			<< value.z << "]" << std::endl;

}