descent/LIB/IBITBLT.H

/*
THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
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FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
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COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
*/
/*
 * $Source: f:/miner/source/2d/rcs/ibitblt.h $
 * $Revision: 1.2 $
 * $Author: john $
 * $Date: 1994/05/31 11:10:56 $
 * 
 * Prototypes for the ibitblt functions.
 * 
 * $Log: ibitblt.h $
 * Revision 1.2  1994/05/31  11:10:56  john
 * *** empty log message ***
 * 
 * Revision 1.1  1994/05/30  16:08:46  john
 * Initial revision
 * 
 * 
 */



#ifndef _IBITBLT_H
#define _IBITBLT_H

// Finds location/size of the largest "hole" in bitmap mask_bmp
void		gr_ibitblt_find_hole_size ( grs_bitmap * mask_bmp, int *minx, int *miny, int *maxx, int *maxy );

// Creates a code mask that will copy data from a bitmap that is sw by sh starting from 
// location sx, sy with a rowsize of srowsize onto another bitmap but only copies
// into pixel locations that are defined as transparent in bitmap bmp.
ubyte	*	gr_ibitblt_create_mask ( grs_bitmap * mask_bmp, int sx, int sy, int sw, int sh, int srowsize );

// Copy source bitmap onto destination bitmap, not copying pixels that are defined
// transparent by the mask
void 		gr_ibitblt (grs_bitmap * source_bmp, grs_bitmap * dest_bmp, ubyte * mask );

#endif