dxx-rebirth/2d/gpixel.c
2006-03-20 16:43:15 +00:00

108 lines
2.8 KiB
C
Executable file

/*
THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
SOFTWARE CORPORATION ("PARALLAX"). PARALLAX, IN DISTRIBUTING THE CODE TO
END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
IN USING, DISPLAYING, AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES. THE END-USER UNDERSTANDS
AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
*/
/*
* $Source: /cvsroot/dxx-rebirth/d1x-rebirth/2d/gpixel.c,v $
* $Revision: 1.1.1.1 $
* $Author: zicodxx $
* $Date: 2006/03/17 19:39:02 $
*
* Graphical routines for getting a pixel's value.
*
* $Log: gpixel.c,v $
* Revision 1.1.1.1 2006/03/17 19:39:02 zicodxx
* initial import
*
* Revision 1.1.1.1 1999/06/14 21:57:23 donut
* Import of d1x 1.37 source.
*
* Revision 1.5 1994/11/18 22:50:20 john
* Changed shorts to ints in parameters.
*
* Revision 1.4 1994/05/06 12:50:08 john
* Added supertransparency; neatend things up; took out warnings.
*
* Revision 1.3 1993/10/15 16:22:50 john
* y
*
* Revision 1.2 1993/09/29 16:15:00 john
* optimized
*
* Revision 1.1 1993/09/08 11:43:40 john
* Initial revision
*
*
*/
#include "u_mem.h"
#include "gr.h"
#include "grdef.h"
#ifdef __MSDOS__
#include "modex.h"
#include "vesa.h"
#endif
unsigned char gr_ugpixel( grs_bitmap * bitmap, int x, int y )
{
#ifdef __MSDOS__
switch(bitmap->bm_type)
{
case BM_LINEAR:
#endif
return bitmap->bm_data[ bitmap->bm_rowsize*y + x ];
#ifdef __MSDOS__
case BM_MODEX:
x += bitmap->bm_x;
y += bitmap->bm_y;
gr_modex_setplane( x & 3 );
return gr_video_memory[(bitmap->bm_rowsize * y) + (x/4)];
case BM_SVGA:
{
unsigned int offset;
offset = (unsigned int)bitmap->bm_data + (unsigned int)bitmap->bm_rowsize * y + x;
gr_vesa_setpage( offset >> 16 );
return gr_video_memory[offset & 0xFFFF];
}
}
return 0;
#endif
}
unsigned char gr_gpixel( grs_bitmap * bitmap, int x, int y )
{
if ((x<0) || (y<0) || (x>=bitmap->bm_w) || (y>=bitmap->bm_h)) return 0;
#ifdef __MSDOS__
switch(bitmap->bm_type)
{
case BM_LINEAR:
#endif
return bitmap->bm_data[ bitmap->bm_rowsize*y + x ];
#ifdef __MSDOS__
case BM_MODEX:
x += bitmap->bm_x;
y += bitmap->bm_y;
gr_modex_setplane( x & 3 );
return gr_video_memory[(bitmap->bm_rowsize * y) + (x/4)];
case BM_SVGA:
{
unsigned int offset;
offset = (unsigned int)bitmap->bm_data + (unsigned int)bitmap->bm_rowsize * y + x;
gr_vesa_setpage( offset >> 16 );
return gr_video_memory[offset & 0xFFFF];
}
}
return 0;
#endif
}