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SGI Developer Toolbox 6.1
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SGI Developer Toolbox 6.1 - Disc 4.iso
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src
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haeberli
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libgutil
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getapixel.c
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C/C++ Source or Header
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1994-08-01
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52 lines
/*
* Copyright 1991, 1992, 1993, 1994, Silicon Graphics, Inc.
* All Rights Reserved.
*
* This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics, Inc.;
* the contents of this file may not be disclosed to third parties, copied or
* duplicated in any form, in whole or in part, without the prior written
* permission of Silicon Graphics, Inc.
*
* RESTRICTED RIGHTS LEGEND:
* Use, duplication or disclosure by the Government is subject to restrictions
* as set forth in subdivision (c)(1)(ii) of the Rights in Technical Data
* and Computer Software clause at DFARS 252.227-7013, and/or in similar or
* successor clauses in the FAR, DOD or NASA FAR Supplement. Unpublished -
* rights reserved under the Copyright Laws of the United States.
*/
/*
* getapixel -
* Read a pixel from a specific screen location.
*
* Paul Haeberli - 1985
*/
#include "gl.h"
#include "device.h"
getapixel(mousex, mousey)
short mousex, mousey;
{
unsigned short pixel;
pushviewport();
pushmatrix();
screenspace();
cmov2i(mousex, mousey);
readpixels(1,&pixel);
popmatrix();
popviewport();
return(pixel);
}
getrgbpix(mousex, mousey, r, g, b)
short mousex, mousey;
int *r, *g ,*b;
{
unsigned long pix[1];
readdisplay(mousex,mousey,mousex,mousey,pix,0);
*r = (pix[0]>>0)&0xff;
*g = (pix[0]>>8)&0xff;
*b = (pix[0]>>16)&0xff;
}