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Amiga ACS 1998 #6
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amigaacscoverdisc1998-061998.iso
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descent
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2d
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pixel.c
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1998-06-08
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/*
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: f:/miner/source/2d/rcs/pixel.c $
* $Revision: 1.5 $
* $Author: john $
* $Date: 1994/11/18 22:50:26 $
*
* Graphical routines for setting a pixel.
*
* $Log: pixel.c $
* Revision 1.5 1994/11/18 22:50:26 john
* Changed shorts to ints in parameters.
*
* Revision 1.4 1993/10/15 16:22:26 john
* *** empty log message ***
*
* Revision 1.3 1993/09/29 17:31:27 john
* optimized vesa pixel stuff
*
* Revision 1.2 1993/09/29 16:15:15 john
* optimized
*
* Revision 1.1 1993/09/08 11:44:09 john
* Initial revision
*
*
*/
#include "mem.h"
#include "gr.h"
#include "grdef.h"
void gr_upixel( int x, int y )
{
switch (TYPE)
{
case BM_LINEAR:
DATA[ ROWSIZE*y+x ] = COLOR;
return;
case BM_MODEX:
gr_modex_setplane( (x+XOFFSET) & 3 );
gr_video_memory[(ROWSIZE * (y+YOFFSET)) + ((x+XOFFSET)>>2)] = COLOR;
return;
case BM_SVGA:
gr_vesa_pixel( COLOR, (unsigned int)DATA + (unsigned int)ROWSIZE * y + x);
return;
}
}
void gr_pixel( int x, int y )
{
if ((x<0) || (y<0) || (x>=WIDTH) || (y>=HEIGHT)) return;
switch (TYPE)
{
case BM_LINEAR:
DATA[ ROWSIZE*y+x ] = COLOR;
return;
case BM_MODEX:
gr_modex_setplane( (x+XOFFSET) & 3 );
gr_video_memory[(ROWSIZE * (y+YOFFSET)) + ((x+XOFFSET)>>2)] = COLOR;
return;
case BM_SVGA:
gr_vesa_pixel( COLOR, (unsigned int)DATA + (unsigned int)ROWSIZE * y + x);
return;
}
}
void gr_bm_upixel( grs_bitmap * bm, int x, int y, unsigned char color )
{
switch (bm->bm_type)
{
case BM_LINEAR:
bm->bm_data[ bm->bm_rowsize*y+x ] = color;
return;
case BM_MODEX:
x += bm->bm_x;
y += bm->bm_y;
gr_modex_setplane( x & 3 );
gr_video_memory[(bm->bm_rowsize * y) + (x/4)] = color;
return;
case BM_SVGA:
gr_vesa_pixel(color,(unsigned int)bm->bm_data + (unsigned int)bm->bm_rowsize * y + x);
return;
}
}
void gr_bm_pixel( grs_bitmap * bm, int x, int y, unsigned char color )
{
if ((x<0) || (y<0) || (x>=bm->bm_w) || (y>=bm->bm_h)) return;
switch (bm->bm_type)
{
case BM_LINEAR:
bm->bm_data[ bm->bm_rowsize*y+x ] = color;
return;
case BM_MODEX:
x += bm->bm_x;
y += bm->bm_y;
gr_modex_setplane( x & 3 );
gr_video_memory[(bm->bm_rowsize * y) + (x/4)] = color;
return;
case BM_SVGA:
gr_vesa_pixel(color,(unsigned int)bm->bm_data + (unsigned int)bm->bm_rowsize * y + x);
return;
}
}