diff options
Diffstat (limited to 'hw/xfree86/xf4bpp/ppcRslvC.c')
| -rw-r--r-- | hw/xfree86/xf4bpp/ppcRslvC.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/hw/xfree86/xf4bpp/ppcRslvC.c b/hw/xfree86/xf4bpp/ppcRslvC.c new file mode 100644 index 000000000..5d33bc3c9 --- /dev/null +++ b/hw/xfree86/xf4bpp/ppcRslvC.c @@ -0,0 +1,176 @@ +/* $XFree86: xc/programs/Xserver/hw/xfree86/xf4bpp/ppcRslvC.c,v 1.5 2001/12/17 20:00:46 dawes Exp $ */ +/************************************************************ +Copyright 1987 by Sun Microsystems, Inc. Mountain View, CA. + + 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 no- +tice appear in all copies and that both that copyright no- +tice and this permission notice appear in supporting docu- +mentation, and that the names of Sun or X Consortium +not be used in advertising or publicity pertaining to +distribution of the software without specific prior +written permission. Sun and X Consortium make no +representations about the suitability of this software for +any purpose. It is provided "as is" without any express or +implied warranty. + +SUN DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, +INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FIT- +NESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SUN BE LI- +ABLE 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. + +********************************************************/ + +/* + * 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: ppcRslvC.c /main/7 1996/02/21 17:58:25 kaleb $ */ + +/* Generic Color Resolution Scheme + * P. Shupak 12/31/87 + */ + +#include "xf4bpp.h" +#include "scrnintstr.h" + +/* + * New colormap routines that can support multiple Visual types. + */ + +static unsigned short defstaticpalette[16][3] = { + /* R G B */ + { 0x0000, 0x0000, 0x0000 }, /* black */ + { 0xFFFF, 0xFFFF, 0xFFFF }, /* white */ + { 0xAAAA, 0xAAAA, 0xAAAA }, /* grey */ + { 0x0000, 0x0000, 0xAAAA }, /* dark blue */ + { 0x0000, 0x0000, 0xFFFF }, /* medium blue */ + { 0x0000, 0xAAAA, 0xFFFF }, /* light blue */ + { 0x0000, 0xFFFF, 0xFFFF }, /* cyan */ + { 0x0000, 0xAAAA, 0x0000 }, /* dark green */ + { 0x0000, 0xFFFF, 0x0000 }, /* green */ + { 0xAAAA, 0xFFFF, 0x5555 }, /* pale green */ + { 0xAAAA, 0x5555, 0x0000 }, /* brown */ + { 0xFFFF, 0xAAAA, 0x0000 }, /* light brown */ + { 0xFFFF, 0xFFFF, 0x0000 }, /* yellow */ + { 0xAAAA, 0x0000, 0xAAAA }, /* purple */ + { 0xFFFF, 0x0000, 0xFFFF }, /* magenta */ + { 0xFFFF, 0x0000, 0x0000 }, /* red */ + }; + +Bool +xf4bppInitializeColormap(pmap) + register ColormapPtr pmap; +{ + register unsigned i; + register VisualPtr pVisual; + unsigned lim, maxent, shift; + + pVisual = pmap->pVisual; + lim = (1 << pVisual->bitsPerRGBValue) - 1; + shift = 16 - pVisual->bitsPerRGBValue; + maxent = pVisual->ColormapEntries - 1; + + switch( pVisual->class ) + { + case StaticGray: + for ( i = 0 ; i < maxent ; i++ ) { + pmap->red[i].co.local.red = + pmap->red[i].co.local.green = + pmap->red[i].co.local.blue = + ((((i * 65535) / maxent) >> shift) * 65535) / lim; + } + break; + case StaticColor: + for ( i = 0 ; i < 16 ; i++ ) { + pmap->red[i].co.local.red = (defstaticpalette[i][0]); + pmap->red[i].co.local.green = (defstaticpalette[i][1]); + pmap->red[i].co.local.blue = (defstaticpalette[i][2]); + } + break; + case GrayScale: + case PseudoColor: + for(i=0;i<=maxent;i++) { + int a,b,c; + a = i << 10; + b = i << 12; + c = i << 14; + pmap->red[i].co.local.red = a; + pmap->red[i].co.local.green = b; + pmap->red[i].co.local.blue = c; + } + break; + case TrueColor: + case DirectColor: + default: + ErrorF( "Unsupported Visual class %d\b", pVisual->class ); + return FALSE; + } + return TRUE; +} + +void +xf4bppResolveColor( pred, pgreen, pblue, pVisual ) +register unsigned short* pred ; +register unsigned short* pgreen ; +register unsigned short* pblue ; +register VisualPtr pVisual ; +{ + unsigned lim, maxent, shift; + + lim = (1 << pVisual->bitsPerRGBValue) - 1; + shift = 16 - pVisual->bitsPerRGBValue; + maxent = pVisual->ColormapEntries - 1; + + switch( pVisual->class ) + { + case StaticGray: + *pred = (30L * *pred + 59L * *pgreen + 11L * *pblue) / 100; + *pred = (((*pred * (maxent + 1)) >> 16) * 65535) / maxent; + *pblue = *pgreen = *pred = ((*pred >> shift) * 65535) / lim; + break; + case StaticColor: + break; + case GrayScale: + *pred = (30L * *pred + 59L * *pgreen + 11L * *pblue) / 100; + *pblue = *pgreen = *pred = ((*pred >> shift) * 65535) / lim; + break; + case PseudoColor: + /* rescale to rgb bits */ + *pred = ((*pred >> shift) * 65535) / lim; + *pgreen = ((*pgreen >> shift) * 65535) / lim; + *pblue = ((*pblue >> shift) * 65535) / lim; + break; + case TrueColor: + case DirectColor: + default: + ErrorF( "Unsupported Visual class %d\b", pVisual->class ); + } +} + |