93 lines
2.9 KiB
C
93 lines
2.9 KiB
C
/* $XFree86: xc/programs/Xserver/hw/xfree86/xf4bpp/vgaVideo.h,v 1.1.2.1 1998/06/27 14:48:54 dawes Exp $ */
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/*
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* Copyright IBM Corporation 1987,1988,1989
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*
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* All Rights Reserved
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*
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* Permission to use, copy, modify, and distribute this software and its
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* documentation for any purpose and without fee is hereby granted,
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* provided that the above copyright notice appear in all copies and that
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* both that copyright notice and this permission notice appear in
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* supporting documentation, and that the name of IBM not be
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* used in advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission.
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*
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* IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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* IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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* ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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* WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*
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*/
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/* $XConsortium: vgaVideo.h /main/4 1996/02/21 17:59:14 kaleb $ */
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#include "misc.h" /* GJA -- for pointer data type */
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#ifdef lint
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#if defined(volatile)
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#undef volatile
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#endif
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#define volatile /**/
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#if defined(const)
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#undef const
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#endif
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#define const /**/
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#if defined(signed)
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#undef signed
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#endif
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#define signed /**/
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#endif
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/*
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* References to all pc ( i.e. '286 ) memory in the
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* regions used by the [ev]ga server ( the 128K windows )
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* MUST be long-word ( i.e. 32-bit ) reads or writes.
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* This definition will change for other memory architectures
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* ( e.g. AIX-Rt )
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*/
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typedef unsigned char VideoAdapterObject ;
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typedef volatile VideoAdapterObject *VideoMemoryPtr ;
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typedef volatile VideoAdapterObject *VgaMemoryPtr ;
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#if !defined(BITMAP_BIT_ORDER)
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#define BITMAP_BIT_ORDER MSBFirst
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#endif
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#if !defined(IMAGE_BYTE_ORDER)
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#define IMAGE_BYTE_ORDER LSBFirst
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#endif
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/* Bit Ordering Macros */
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#if !defined(SCRLEFT8)
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#define SCRLEFT8(lw, n) ( (unsigned char) (((unsigned char) lw) << (n)) )
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#endif
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#if !defined(SCRRIGHT8)
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#define SCRRIGHT8(lw, n) ( (unsigned char) (((unsigned char)lw) >> (n)) )
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#endif
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/* These work ONLY on 8-bit wide Quantities !! */
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#define LeftmostBit ( SCRLEFT8( 0xFF, 7 ) & 0xFF )
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#define RightmostBit ( SCRRIGHT8( 0xFF, 7 ) & 0xFF )
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/*
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* [ev]ga video screen defines & macros
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*/
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#define VGA_BLACK_PIXEL 0
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#define VGA_WHITE_PIXEL 1
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#define VGA_MAXPLANES 4
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#define VGA_ALLPLANES 0xFL
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#define VIDBASE(pDraw) ((volatile unsigned char *) \
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(((PixmapPtr)(((DrawablePtr)(pDraw))->pScreen->devPrivate))-> \
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devPrivate.ptr))
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#define BYTES_PER_LINE(pDraw) \
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((int)((PixmapPtr)(((DrawablePtr)(pDraw))->pScreen->devPrivate))->devKind)
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#define ROW_OFFSET( x ) ( ( x ) >> 3 )
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#define BIT_OFFSET( x ) ( ( x ) & 0x7 )
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#define SCREENADDRESS( pWin, x, y ) \
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( VIDBASE(pWin) + (y) * BYTES_PER_LINE(pWin) + ROW_OFFSET(x) )
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