| 1 | /* $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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| 2 | /*
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| 3 | * Copyright IBM Corporation 1987,1988,1989
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| 4 | *
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| 5 | * All Rights Reserved
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| 6 | *
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| 7 | * Permission to use, copy, modify, and distribute this software and its
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| 8 | * documentation for any purpose and without fee is hereby granted,
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| 9 | * provided that the above copyright notice appear in all copies and that
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| 10 | * both that copyright notice and this permission notice appear in
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| 11 | * supporting documentation, and that the name of IBM not be
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| 12 | * used in advertising or publicity pertaining to distribution of the
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| 13 | * software without specific, written prior permission.
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| 14 | *
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| 15 | * IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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| 16 | * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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| 17 | * IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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| 18 | * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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| 19 | * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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| 20 | * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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| 21 | * SOFTWARE.
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| 22 | *
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| 23 | */
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| 24 |
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| 25 | /* $XConsortium: vgaVideo.h /main/4 1996/02/21 17:59:14 kaleb $ */
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| 26 |
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| 27 | #ifdef HAVE_XORG_CONFIG_H
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| 28 | #include <xorg-config.h>
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| 29 | #endif
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| 30 |
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| 31 | #include "misc.h" /* GJA -- for pointer data type */
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| 32 | #ifdef lint
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| 33 | #if defined(volatile)
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| 34 | #undef volatile
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| 35 | #endif
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| 36 | #define volatile /**/
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| 37 | #if defined(const)
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| 38 | #undef const
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| 39 | #endif
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| 40 | #define const /**/
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| 41 | #if defined(signed)
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| 42 | #undef signed
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| 43 | #endif
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| 44 | #define signed /**/
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| 45 | #endif
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| 46 |
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| 47 | /*
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| 48 | * References to all pc ( i.e. '286 ) memory in the
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| 49 | * regions used by the [ev]ga server ( the 128K windows )
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| 50 | * MUST be long-word ( i.e. 32-bit ) reads or writes.
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| 51 | * This definition will change for other memory architectures
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| 52 | * ( e.g. AIX-Rt )
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| 53 | */
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| 54 | typedef unsigned char VideoAdapterObject ;
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| 55 | typedef volatile VideoAdapterObject *VideoMemoryPtr ;
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| 56 | typedef volatile VideoAdapterObject *VgaMemoryPtr ;
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| 57 | #if !defined(BITMAP_BIT_ORDER)
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| 58 | #define BITMAP_BIT_ORDER MSBFirst
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| 59 | #endif
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| 60 |
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| 61 | #if !defined(IMAGE_BYTE_ORDER)
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| 62 | #define IMAGE_BYTE_ORDER LSBFirst
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| 63 | #endif
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| 64 |
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| 65 | /* Bit Ordering Macros */
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| 66 | #if !defined(SCRLEFT8)
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| 67 | #define SCRLEFT8(lw, n) ( (unsigned char) (((unsigned char) lw) << (n)) )
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| 68 | #endif
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| 69 | #if !defined(SCRRIGHT8)
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| 70 | #define SCRRIGHT8(lw, n) ( (unsigned char) (((unsigned char)lw) >> (n)) )
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| 71 | #endif
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| 72 | /* These work ONLY on 8-bit wide Quantities !! */
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| 73 | #define LeftmostBit ( SCRLEFT8( 0xFF, 7 ) & 0xFF )
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| 74 | #define RightmostBit ( SCRRIGHT8( 0xFF, 7 ) & 0xFF )
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| 75 |
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| 76 | /*
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| 77 | * [ev]ga video screen defines & macros
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| 78 | */
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| 79 | #define VGA_BLACK_PIXEL 0
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| 80 | #define VGA_WHITE_PIXEL 1
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| 81 |
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| 82 | #define VGA_MAXPLANES 4
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| 83 | #define VGA_ALLPLANES 0xFL
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| 84 |
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| 85 | #define VIDBASE(pDraw) ((volatile unsigned char *) \
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| 86 | (((PixmapPtr)(((DrawablePtr)(pDraw))->pScreen->devPrivate))-> \
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| 87 | devPrivate.ptr))
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| 88 | #define BYTES_PER_LINE(pDraw) \
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| 89 | ((int)((PixmapPtr)(((DrawablePtr)(pDraw))->pScreen->devPrivate))->devKind)
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| 90 |
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| 91 | #define ROW_OFFSET( x ) ( ( x ) >> 3 )
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| 92 | #define BIT_OFFSET( x ) ( ( x ) & 0x7 )
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| 93 | #define SCREENADDRESS( pWin, x, y ) \
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| 94 | ( VIDBASE(pWin) + (y) * BYTES_PER_LINE(pWin) + ROW_OFFSET(x) )
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| 95 |
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| 96 |
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