//=============================================================================================
// Collection of classes from lecture slides.
// Framework for assignments. Valid from 2019.
// Do not change it if you want to submit a homework.
//=============================================================================================
#include "framework.h"

// Initialization
void onInitialization();

// Window has become invalid: Redraw
void onDisplay();

// Key of ASCII code pressed
void onKeyboard(unsigned char key, int pX, int pY);

// Key of ASCII code released
void onKeyboardUp(unsigned char key, int pX, int pY);

// Move mouse with key pressed
void onMouseMotion(int pX, int pY);

// Mouse click event
void onMouse(int button, int state, int pX, int pY);

// Idle event indicating that some time elapsed: do animation here
void onIdle();

// Entry point of the application
int main(int argc, char * argv[]) {
	// Initialize GLUT, Glew and OpenGL 
	glutInit(&argc, argv);

	// OpenGL major and minor versions
	int majorVersion = 3, minorVersion = 3;
#if !defined(__APPLE__)
	glutInitContextVersion(majorVersion, minorVersion);
#endif
	glutInitWindowSize(windowWidth, windowHeight);				// Application window is initially of resolution 600x600
	glutInitWindowPosition(100, 100);							// Relative location of the application window
#if defined(__APPLE__)
	glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH | GLUT_3_2_CORE_PROFILE);  // 8 bit R,G,B,A + double buffer + depth buffer
#else
	glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH);
#endif
	glutCreateWindow(argv[0]);

#if !defined(__APPLE__)
	glewExperimental = true;	// magic
	glewInit();
#endif
	printf("GL Vendor    : %s\n", glGetString(GL_VENDOR));
	printf("GL Renderer  : %s\n", glGetString(GL_RENDERER));
	printf("GL Version (string)  : %s\n", glGetString(GL_VERSION));
	glGetIntegerv(GL_MAJOR_VERSION, &majorVersion);
	glGetIntegerv(GL_MINOR_VERSION, &minorVersion);
	printf("GL Version (integer) : %d.%d\n", majorVersion, minorVersion);
	printf("GLSL Version : %s\n", glGetString(GL_SHADING_LANGUAGE_VERSION));

	// Initialize this program and create shaders
	onInitialization();

	glutDisplayFunc(onDisplay);                // Register event handlers
	glutMouseFunc(onMouse);
	glutIdleFunc(onIdle);
	glutKeyboardFunc(onKeyboard);
	glutKeyboardUpFunc(onKeyboardUp);
	glutMotionFunc(onMouseMotion);

	glutMainLoop();
	return 1;
}