/*
A simple graphics library for CSE 20211 by Douglas Thain
For course assignments, you should not change this file.
For complete documentation, see:
http://www.nd.edu/~dthain/courses/cse20211/fall2011/gfx
Version 2, 9/23/2011 - Fixes a bug that could result in jerky animation.
*/

#ifndef GFX_H
#define GFX_H

/* Open a new graphics window. */
void gfx_open( int width, int height, const char *title );

/* Draw a line from (x1,y1) to (x2,y2) */
void gfx_line( int x1, int y1, int x2, int y2 );

/* Change the current drawing color. */
void gfx_color( int red, int green, int blue );

/* Clear the graphics window to the background color. */
void gfx_clear();

/* Change the current background color. */
void gfx_clear_color( int red, int green, int blue );

/* Wait for the user to press a key or mouse button. */
char gfx_wait();

/* Return the X and Y coordinates of the last event. */
int gfx_xpos();
int gfx_ypos();

/* Check to see if an event is waiting. */
int gfx_event_waiting();

/* Flush all previous output to the window. */
void gfx_flush();

#endif