#ifndef CANVASH
#define CANVASH

#include <gl/gl.h>
#include <gl/device.h>
#include "geo.h"

typedef struct GLCanvas {
    int x;              /* x-coord of placement             */
    int y;              /* y-coord of placement             */
    int width;          /* width of drawing area            */
    int height;         /* height of drawing are            */
    unsigned long *pixels;        /* pointer to 32 bit pixel buffer   */
	float sizemultiplier;

/* appliocation specific */
	unsigned char *buffer;   /* stores image in jpeg rgb format */
	int lastcompression;   /* the last value we compressed at */
	int lastsmoothing;  
	IntRect validgeometry;
                        /*   See comment below              */
} GLCanvas;
/* A note on the pixel buffer:                                      */
/*  "Pixel data to be interpreted as red-green-blue-alpha packs     */
/*   8 bits for each into a 32-bit word.  Bits 0-7 represent red,   */
/*   bits 8-15 represent green, bits 16-32 represent blue, and      */
/*   bits 24-31 represent alpha.  For example, 0x01020304           */
/*   corresponds to a pixel whose red, green, blue, and alpha       */
/*   values are 4, 3, 2, and 1, repectively."                       */
/*      - IRIS 4D Series Graphics Library Programming Guide         */

void drawCanvas(GLCanvas *canvas)  ;
void invertcanvas(struct GLCanvas *canvas)  ;
void saveGLStackStates(void);
void restoreGLStackStates(void);


#endif