/*
A simple graphics library for CSE 20211 by Douglas Thain
  Updated / extended by R. Ansari (Dec 2024) Paris-Saclay Univ. for Magistere C-language course project 

This work is licensed under a Creative Commons Attribution 4.0 International License.  https://creativecommons.org/licenses/by/4.0/

For course assignments, you should not change this file.
For complete documentation, see:
http://www.nd.edu/~dthain/courses/cse20211/fall2013/gfx
Version 3, 11/07/2012 - Now much faster at changing colors rapidly.
Version 2, 9/23/2011 - Fixes a bug that could result in jerky animation.

------ December 2024
Version V=4 ?  27/12/2024 - by R. Ansari , Univ. Paris-Saclay, for Magistere C-language course project  
*/

#ifndef GFX_H
#define GFX_H

#ifdef __cplusplus
extern "C"
{
#endif
  
/*   R. Ansari - December 2024 , added list of predefined colors
    See https://en.wikipedia.org/wiki/X11_color_names  for X11 color definition    */
enum gfx_colors { gfx_black=0, gfx_white=1, gfx_grey=2, gfx_darkgrey=3,
		  gfx_red=4, gfx_green=5, gfx_blue=6, gfx_yellow=7,
		  gfx_orange=8, gfx_magenta=9, gfx_purple=10,
		  gfx_skyblue=11, gfx_teal=12, gfx_ivory=13, gfx_wheat=14};

/* Open a new graphics window. default background color=black */
void gfx_open( int width, int height, const char *title);
/*   R. Ansari - December 2024 , open a window with the specified background color */
void gfx_open_c( int width, int height, const char *title, enum gfx_colors bkgcol);

/*   R. Ansari - December 2024 , closes and unmap the window */
void gfx_close();

/* Draw a point at (x,y) */
void gfx_point( int x, int y );

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

/*   R. Ansari - December 2024 ,  rectangle, circle and text  drawing functions  */
void gfx_rect( int x, int y, unsigned int w, unsigned int h);
void gfx_fillrect( int x, int y, unsigned int w, unsigned int h);
void gfx_circle( int xc, int yc, unsigned int r);
void gfx_fillcircle( int xc, int yc, unsigned int r);
void gfx_string( int x, int y, const char * str);


/* Change the current drawing color. */
void gfx_color( int red, int green, int blue );
/*   R. Ansari - December 2024 , color selection from pre-defined colors  */
void gfx_color_p(enum gfx_colors col);

/* 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 );

/*   R. Ansari - December 2024 ,Change the current background color, selection from pre-defined colors  */
void gfx_clear_color_p(enum gfx_colors col);

/* 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();

/* Return the X and Y dimensions of the window. */
int gfx_xsize();
int gfx_ysize();

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

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

#ifdef __cplusplus
} // extern "C"
#endif

#endif