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/* $XFree86: xc/programs/Xserver/hw/xfree86/xf4bpp/wm3.h,v 1.3 2000/09/26 15:57:21 tsi Exp $ */
/* $XConsortium: wm3.h /main/4 1996/02/21 17:59:24 kaleb $ */
#include "vgaReg.h"
#ifdef PC98_EGC
#define VGA_ALLPLANES 0xFL
#endif
/* Do call in Write Mode 3.
* We take care of the possibility that two passes are needed.
*/
#ifndef PC98_EGC
#define DO_WM3(pgc,call) \
{ int _tp, _fg, _bg, _alu; \
_fg = pgc->fgPixel; _bg = pgc->bgPixel; \
_tp = wm3_set_regs(pgc); \
(call); \
if ( _tp ) { \
_alu = pgc->alu; \
pgc->alu = GXinvert; \
_tp = wm3_set_regs(pgc); \
(call); \
pgc->alu = _alu; \
} \
pgc->fgPixel = _fg; pgc->bgPixel = _bg; \
}
#else
#define DO_WM3(pgc,call) \
{ int _tp, _fg, _bg; \
_fg = pgc->fgPixel; _bg = pgc->bgPixel; \
_tp = wm3_set_regs(pgc); \
(call); \
pgc->fgPixel = _fg; pgc->bgPixel = _bg; \
}
#endif
#ifndef PC98_EGC
#define WM3_SET_INK(ink) \
SetVideoGraphics(Set_ResetIndex, ink)
#else
#define WM3_SET_INK(ink) \
outw(EGC_FGC, ink)
#endif
/* GJA -- Move a long word to screen memory.
* The reads into 'dummy' are here to load the VGA latches.
* This is a RMW operation except for trivial cases.
* Notice that we ignore the operation.
*/
#ifdef PC98_EGC
#define UPDRW(destp,src) \
{ volatile unsigned short *_dtmp = \
(volatile unsigned short *)(destp); \
unsigned int _stmp = (src); \
*_dtmp = _stmp; _dtmp++; _stmp >>= 16; \
*_dtmp = _stmp; }
#else
#define UPDRW(destp,src) \
{ volatile char *_dtmp = (volatile char *)(destp); \
unsigned int _stmp = (src); \
volatile int dummy; /* Bit bucket. */ \
_stmp = ldl_u(&_stmp); \
dummy = *_dtmp; *_dtmp = _stmp; _dtmp++; _stmp >>= 8; \
dummy = *_dtmp; *_dtmp = _stmp; _dtmp++; _stmp >>= 8; \
dummy = *_dtmp; *_dtmp = _stmp; _dtmp++; _stmp >>= 8; \
dummy = *_dtmp; *_dtmp = _stmp; }
#endif
#define UPDRWB(destp,src) \
{ volatile int dummy; /* Bit bucket. */ \
dummy = *(destp); *(destp) = (src); }
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