4.4BSD/usr/src/contrib/X11R5-hp300/mit/server/ddx/hpbsd/cfb/cfbcmap.c
/************************************************************
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#include "X.h"
#include "Xproto.h"
#include "scrnintstr.h"
#include "colormapst.h"
#include "resource.h"
#ifdef STATIC_COLOR
static ColormapPtr InstalledMaps[MAXSCREENS];
int
cfbListInstalledColormaps(pScreen, pmaps)
ScreenPtr pScreen;
Colormap *pmaps;
{
/* By the time we are processing requests, we can guarantee that there
* is always a colormap installed */
*pmaps = InstalledMaps[pScreen->myNum]->mid;
return (1);
}
void
cfbInstallColormap(pmap)
ColormapPtr pmap;
{
int index = pmap->pScreen->myNum;
ColormapPtr oldpmap = InstalledMaps[index];
if(pmap != oldpmap)
{
/* Uninstall pInstalledMap. No hardware changes required, just
* notify all interested parties. */
if(oldpmap != (ColormapPtr)None)
WalkTree(pmap->pScreen, TellLostMap, (char *)&oldpmap->mid);
/* Install pmap */
InstalledMaps[index] = pmap;
WalkTree(pmap->pScreen, TellGainedMap, (char *)&pmap->mid);
}
}
void
cfbUninstallColormap(pmap)
ColormapPtr pmap;
{
int index = pmap->pScreen->myNum;
ColormapPtr curpmap = InstalledMaps[index];
if(pmap == curpmap)
{
if (pmap->mid != pmap->pScreen->defColormap)
{
curpmap = (ColormapPtr) LookupIDByType(pmap->pScreen->defColormap,
RT_COLORMAP);
(*pmap->pScreen->InstallColormap)(curpmap);
}
}
}
#endif
void
cfbResolveColor(pred, pgreen, pblue, pVisual)
unsigned short *pred, *pgreen, *pblue;
register VisualPtr pVisual;
{
int shift = 16 - pVisual->bitsPerRGBValue;
unsigned lim = (1 << pVisual->bitsPerRGBValue) - 1;
if ((pVisual->class == PseudoColor) || (pVisual->class == DirectColor))
{
/* rescale to rgb bits */
*pred = ((*pred >> shift) * 65535) / lim;
*pgreen = ((*pgreen >> shift) * 65535) / lim;
*pblue = ((*pblue >> shift) * 65535) / lim;
}
else if (pVisual->class == GrayScale)
{
/* rescale to gray then rgb bits */
*pred = (30L * *pred + 59L * *pgreen + 11L * *pblue) / 100;
*pblue = *pgreen = *pred = ((*pred >> shift) * 65535) / lim;
}
else if (pVisual->class == StaticGray)
{
unsigned limg = pVisual->ColormapEntries - 1;
/* rescale to gray then [0..limg] then [0..65535] then rgb bits */
*pred = (30L * *pred + 59L * *pgreen + 11L * *pblue) / 100;
*pred = ((((*pred * (limg + 1))) >> 16) * 65535) / limg;
*pblue = *pgreen = *pred = ((*pred >> shift) * 65535) / lim;
}
else
{
unsigned limr, limg, limb;
limr = pVisual->redMask >> pVisual->offsetRed;
limg = pVisual->greenMask >> pVisual->offsetGreen;
limb = pVisual->blueMask >> pVisual->offsetBlue;
/* rescale to [0..limN] then [0..65535] then rgb bits */
*pred = ((((((*pred * (limr + 1)) >> 16) *
65535) / limr) >> shift) * 65535) / lim;
*pgreen = ((((((*pgreen * (limg + 1)) >> 16) *
65535) / limg) >> shift) * 65535) / lim;
*pblue = ((((((*pblue * (limb + 1)) >> 16) *
65535) / limb) >> shift) * 65535) / lim;
}
}
Bool
cfbInitializeColormap(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;
if (pVisual->class == TrueColor)
{
unsigned limr, limg, limb;
limr = pVisual->redMask >> pVisual->offsetRed;
limg = pVisual->greenMask >> pVisual->offsetGreen;
limb = pVisual->blueMask >> pVisual->offsetBlue;
for(i = 0; i <= maxent; i++)
{
/* rescale to [0..65535] then rgb bits */
pmap->red[i].co.local.red =
((((i * 65535) / limr) >> shift) * 65535) / lim;
pmap->green[i].co.local.green =
((((i * 65535) / limg) >> shift) * 65535) / lim;
pmap->blue[i].co.local.blue =
((((i * 65535) / limb) >> shift) * 65535) / lim;
}
}
else if (pVisual->class == StaticColor)
{
unsigned limr, limg, limb;
limr = pVisual->redMask >> pVisual->offsetRed;
limg = pVisual->greenMask >> pVisual->offsetGreen;
limb = pVisual->blueMask >> pVisual->offsetBlue;
for(i = 0; i <= maxent; i++)
{
/* rescale to [0..65535] then rgb bits */
pmap->red[i].co.local.red =
((((((i & pVisual->redMask) >> pVisual->offsetRed)
* 65535) / limr) >> shift) * 65535) / lim;
pmap->red[i].co.local.green =
((((((i & pVisual->greenMask) >> pVisual->offsetGreen)
* 65535) / limg) >> shift) * 65535) / lim;
pmap->red[i].co.local.blue =
((((((i & pVisual->blueMask) >> pVisual->offsetBlue)
* 65535) / limb) >> shift) * 65535) / lim;
}
}
else if (pVisual->class == StaticGray)
{
for(i = 0; i <= maxent; i++)
{
/* rescale to [0..65535] then rgb bits */
pmap->red[i].co.local.red = ((((i * 65535) / maxent) >> shift)
* 65535) / lim;
pmap->red[i].co.local.green = pmap->red[i].co.local.red;
pmap->red[i].co.local.blue = pmap->red[i].co.local.red;
}
}
return TRUE;
}
/* When simulating DirectColor on PseudoColor hardware, multiple
entries of the colormap must be updated
*/
#define AddElement(mask) { \
pixel = red | green | blue; \
for (i = 0; i < nresult; i++) \
if (outdefs[i].pixel == pixel) \
break; \
if (i == nresult) \
{ \
nresult++; \
outdefs[i].pixel = pixel; \
outdefs[i].flags = 0; \
} \
outdefs[i].flags |= (mask); \
outdefs[i].red = pmap->red[red >> pVisual->offsetRed].co.local.red; \
outdefs[i].green = pmap->green[green >> pVisual->offsetGreen].co.local.green; \
outdefs[i].blue = pmap->blue[blue >> pVisual->offsetBlue].co.local.blue; \
}
cfbExpandDirectColors (pmap, ndef, indefs, outdefs)
ColormapPtr pmap;
int ndef;
xColorItem *indefs, *outdefs;
{
int minred, mingreen, minblue;
register int red, green, blue;
int maxred, maxgreen, maxblue;
int stepred, stepgreen, stepblue;
VisualPtr pVisual;
register int pixel;
register int nresult;
register int i;
pVisual = pmap->pVisual;
stepred = 1 << pVisual->offsetRed;
stepgreen = 1 << pVisual->offsetGreen;
stepblue = 1 << pVisual->offsetBlue;
maxred = pVisual->redMask;
maxgreen = pVisual->greenMask;
maxblue = pVisual->blueMask;
nresult = 0;
for (;ndef--; indefs++)
{
if (indefs->flags & DoRed)
{
red = indefs->pixel & pVisual->redMask;
for (green = 0; green <= maxgreen; green += stepgreen)
{
for (blue = 0; blue <= maxblue; blue += stepblue)
{
AddElement (DoRed)
}
}
}
if (indefs->flags & DoGreen)
{
green = indefs->pixel & pVisual->greenMask;
for (red = 0; red <= maxred; red += stepred)
{
for (blue = 0; blue <= maxblue; blue += stepblue)
{
AddElement (DoGreen)
}
}
}
if (indefs->flags & DoBlue)
{
blue = indefs->pixel & pVisual->blueMask;
for (red = 0; red <= maxred; red += stepred)
{
for (green = 0; green <= maxgreen; green += stepgreen)
{
AddElement (DoBlue)
}
}
}
}
return nresult;
}
Bool
cfbCreateDefColormap(pScreen)
ScreenPtr pScreen;
{
unsigned short zero = 0, ones = 0xFFFF;
VisualPtr pVisual;
ColormapPtr cmap;
for (pVisual = pScreen->visuals;
pVisual->vid != pScreen->rootVisual;
pVisual++)
;
if (CreateColormap(pScreen->defColormap, pScreen, pVisual, &cmap,
(pVisual->class & DynamicClass) ? AllocNone : AllocAll,
0)
!= Success)
return FALSE;
if ((AllocColor(cmap, &zero, &zero, &zero, &(pScreen->blackPixel), 0) !=
Success) ||
(AllocColor(cmap, &ones, &ones, &ones, &(pScreen->whitePixel), 0) !=
Success))
return FALSE;
(*pScreen->InstallColormap)(cmap);
return TRUE;
}