diff options
Diffstat (limited to 'hw/xfree86/xf4bpp/ppcCReduce.c')
| -rw-r--r-- | hw/xfree86/xf4bpp/ppcCReduce.c | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/hw/xfree86/xf4bpp/ppcCReduce.c b/hw/xfree86/xf4bpp/ppcCReduce.c new file mode 100644 index 000000000..a68f5faff --- /dev/null +++ b/hw/xfree86/xf4bpp/ppcCReduce.c @@ -0,0 +1,236 @@ +/* $XFree86: xc/programs/Xserver/hw/xfree86/xf4bpp/ppcCReduce.c,v 1.3 1999/06/06 08:48:58 dawes Exp $ */ +/* + * Copyright IBM Corporation 1987,1988,1989 + * + * All Rights Reserved + * + * Permission to use, copy, modify, and distribute this software and its + * documentation for any purpose and without fee is hereby granted, + * provided that the above copyright notice appear in all copies and that + * both that copyright notice and this permission notice appear in + * supporting documentation, and that the name of IBM not be + * used in advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * + * IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING + * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL + * IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR + * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, + * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, + * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS + * SOFTWARE. + * +*/ + +/* $XConsortium: ppcCReduce.c /main/3 1996/02/21 17:57:17 kaleb $ */ + +#include "xf4bpp.h" +#include "ppcGCstr.h" + +/* xf4bppGetReducedColorRrop( pGC, drawableDepth, returnLoc ) + * An attempt to do "strength reduction" on color raster-ops + * P. Shupak 1/88 + */ + +static void +ppcReduceGeneral +( + register int alu, + register unsigned long pm, + register unsigned long fg, + register unsigned long bg, + register int fillStyle, + int drawableDepth, + ppcReducedRrop *returnLoc +) +{ + +if ( ( alu == GXnoop ) + || !( pm &= ( ( 1 << drawableDepth ) - 1 ) ) ) { + returnLoc->alu = GXnoop ; + return ; +} + +#ifdef DELETE_THIS +switch ( fillStyle ) { + case FillTiled: + switch ( alu ) { + case GXclear: /* 0x0 Zero 0 */ + case GXinvert: /* 0xa NOT dst */ + case GXset: /* 0xf 1 */ + fillStyle = FillSolid ; + default: /* We Can't Do Much Here */ + break ; + } + break ; + case FillOpaqueStippled: + if ( ( fg & pm ) != ( bg & pm ) ) { /* else FillSolid */ + switch ( alu ) { + case GXclear: /* 0x0 Zero 0 */ + case GXset: /* 0xf 1 */ + case GXinvert: /* 0xa NOT dst */ + fillStyle = FillSolid ; + break ; + case GXnor: /* 0x8 NOT src AND NOT dst */ + case GXnand: /* 0xe NOT src OR NOT dst */ + case GXcopy: /* 0x3 src */ + break ; + case GXandReverse: /* 0x2 src AND NOT dst */ + fg = ~fg ; + bg = ~bg ; + alu = GXnor ; + break ; + case GXandInverted: /* 0x4 NOT src AND dst */ + fg = ~fg ; + bg = ~bg ; + alu = GXand ; /* Fall Through */ + case GXand: /* 0x1 src AND dst */ + pm &= ~( fg & bg ) ; + if ( ( bg & pm ) == pm ) { + fillStyle = FillStippled ; + alu = GXclear ; + } + break ; + case GXequiv: /* 0x9 NOT src XOR dst */ + fg = ~fg ; + bg = ~bg ; + alu = GXxor ; /* Fall Through */ + case GXxor: /* 0x6 src XOR dst */ + pm &= ( fg | bg ) ; + if ( !( bg & pm ) ) { + fillStyle = FillStippled ; + alu = GXinvert ; + } + break ; + case GXorReverse: /* 0xb src OR NOT dst */ + fg = ~fg ; + bg = ~bg ; + alu = GXnand ; + break ; + case GXcopyInverted: /* 0xc NOT src */ + fg = ~fg ; + bg = ~bg ; + alu = GXcopy ; + break ; + case GXorInverted: /* 0xd NOT src OR dst */ + fg = ~fg ; + bg = ~bg ; + alu = GXor ; /* Fall Through */ + case GXor: /* 0x7 src OR dst */ + pm &= ( fg | bg ) ; + if ( !( bg & pm ) ) { + fillStyle = FillStippled ; + alu = GXset ; + } + break ; + default: + ErrorF( + "xf4bppGetReducedColorRrop: Unknown Alu Raster-Op" ) ; + break ; + } + break ; /* Don't Fall Through */ + } + else + fillStyle = FillSolid ; + /* Fall Through */ + case FillStippled: + case FillSolid: + switch ( alu ) { + case GXclear: /* 0x0 Zero 0 */ + case GXset: /* 0xf 1 */ + case GXinvert: /* 0xa NOT dst */ + break ; + case GXand: /* 0x1 src AND dst */ + pm &= ~fg ; + alu = GXclear ; + break ; + case GXandReverse: /* 0x2 src AND NOT dst */ + fg = ~fg ; + alu = GXnor ; /* Fall Through */ + case GXnor: /* 0x8 NOT src AND NOT dst */ + if ( !( fg & pm ) ) + alu = GXclear ; + else if ( ( fg & pm ) == pm ) + alu = GXinvert ; + break ; + case GXandInverted: /* 0x4 NOT src AND dst */ + pm &= fg ; + alu = GXclear ; + break ; + case GXxor: /* 0x6 src XOR dst */ + pm &= fg ; + alu = GXinvert ; + break ; + case GXor: /* 0x7 src OR dst */ + pm &= fg ; + alu = GXset ; + break ; + case GXequiv: /* 0x9 NOT src XOR dst */ + pm &= ~fg ; + alu = GXinvert ; + break ; + case GXorReverse: /* 0xb src OR NOT dst */ + fg = ~fg ; + alu = GXnand ; /* Fall Through */ + case GXnand: /* 0xe NOT src OR NOT dst */ + if ( !( fg & pm ) ) + alu = GXset ; + else if ( ( fg & pm ) == pm ) + alu = GXinvert ; + break ; + case GXcopyInverted: /* 0xc NOT src */ + fg = ~fg ; + alu = GXcopy ; /* Fall Through */ + case GXcopy: /* 0x3 src */ + if ( !( fg & pm ) ) + alu = GXclear ; + else if ( ( fg & pm ) == pm ) + alu = GXset ; + break ; + case GXorInverted: /* 0xd NOT src OR dst */ + pm &= ~fg ; + alu = GXset ; + break ; + default: + ErrorF( + "xf4bppGetReducedColorRrop: Unknown Alu Raster-Op" ) ; + break ; + } + break; + default: + ErrorF("xf4bppGetReducedColorRrop: Bad Fillstyle\n"); + break; +} +#endif + +/* Final Test On Restricted Plane Mask */ +if ( !pm ) + alu = GXnoop ; + +/* Set Actual Returned Values */ +returnLoc->planemask = pm ; +returnLoc->fgPixel = fg ; +returnLoc->bgPixel = bg ; +returnLoc->alu = alu ; +returnLoc->fillStyle = fillStyle ; + +return ; +} + +void +xf4bppGetReducedColorRrop( pGC, drawableDepth, returnLoc ) +GC *pGC ; +int drawableDepth ; +ppcReducedRrop *returnLoc ; +{ + +ppcReduceGeneral( pGC->alu, + pGC->planemask, + pGC->fgPixel, + pGC->bgPixel, + pGC->fillStyle, + drawableDepth, + returnLoc ) ; + +return ; +} |