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xenocara/xserver/mi/micmap.c

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/************************************************************
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.
********************************************************/
/*
* This is based on cfbcmap.c. The functions here are useful independently
* of cfb, which is the reason for including them here. How "mi" these
* are may be debatable.
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include <X11/X.h>
#include <X11/Xproto.h>
#include "scrnintstr.h"
#include "colormapst.h"
#include "resource.h"
#include "globals.h"
#include "micmap.h"
_X_EXPORT ColormapPtr miInstalledMaps[MAXSCREENS];
_X_EXPORT int
miListInstalledColormaps(ScreenPtr pScreen, Colormap *pmaps)
{
if (miInstalledMaps[pScreen->myNum]) {
*pmaps = miInstalledMaps[pScreen->myNum]->mid;
return (1);
}
return 0;
}
_X_EXPORT void
miInstallColormap(ColormapPtr pmap)
{
int index = pmap->pScreen->myNum;
ColormapPtr oldpmap = miInstalledMaps[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 */
miInstalledMaps[index] = pmap;
WalkTree(pmap->pScreen, TellGainedMap, (char *)&pmap->mid);
}
}
_X_EXPORT void
miUninstallColormap(ColormapPtr pmap)
{
int index = pmap->pScreen->myNum;
ColormapPtr curpmap = miInstalledMaps[index];
if(pmap == curpmap)
{
if (pmap->mid != pmap->pScreen->defColormap)
{
curpmap = (ColormapPtr) LookupIDByType(pmap->pScreen->defColormap,
RT_COLORMAP);
(*pmap->pScreen->InstallColormap)(curpmap);
}
}
}
_X_EXPORT void
miResolveColor(unsigned short *pred, unsigned short *pgreen,
unsigned short *pblue, VisualPtr pVisual)
{
int shift = 16 - pVisual->bitsPerRGBValue;
unsigned lim = (1 << pVisual->bitsPerRGBValue) - 1;
if ((pVisual->class | DynamicClass) == GrayScale)
{
/* rescale to gray then rgb bits */
*pred = (30L * *pred + 59L * *pgreen + 11L * *pblue) / 100;
*pblue = *pgreen = *pred = ((*pred >> shift) * 65535) / lim;
}
else
{
/* rescale to rgb bits */
*pred = ((*pred >> shift) * 65535) / lim;
*pgreen = ((*pgreen >> shift) * 65535) / lim;
*pblue = ((*pblue >> shift) * 65535) / lim;
}
}
_X_EXPORT Bool
miInitializeColormap(ColormapPtr pmap)
{
unsigned i;
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; \
}
_X_EXPORT int
miExpandDirectColors(ColormapPtr pmap, int ndef, xColorItem *indefs,
xColorItem *outdefs)
{
int red, green, blue;
int maxred, maxgreen, maxblue;
int stepred, stepgreen, stepblue;
VisualPtr pVisual;
int pixel;
int nresult;
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;
}
_X_EXPORT Bool
miCreateDefColormap(ScreenPtr pScreen)
{
/*
* In the following sources PC X server vendors may want to delete
* "_not_tog" from "#ifdef WIN32_not_tog"
*/
#ifdef WIN32_not_tog
/*
* these are the MS-Windows desktop colors, adjusted for X's 16-bit
* color specifications.
*/
static xColorItem citems[] = {
{ 0, 0, 0, 0, 0, 0 },
{ 1, 0x8000, 0, 0, 0, 0 },
{ 2, 0, 0x8000, 0, 0, 0 },
{ 3, 0x8000, 0x8000, 0, 0, 0 },
{ 4, 0, 0, 0x8000, 0, 0 },
{ 5, 0x8000, 0, 0x8000, 0, 0 },
{ 6, 0, 0x8000, 0x8000, 0, 0 },
{ 7, 0xc000, 0xc000, 0xc000, 0, 0 },
{ 8, 0xc000, 0xdc00, 0xc000, 0, 0 },
{ 9, 0xa600, 0xca00, 0xf000, 0, 0 },
{ 246, 0xff00, 0xfb00, 0xf000, 0, 0 },
{ 247, 0xa000, 0xa000, 0xa400, 0, 0 },
{ 248, 0x8000, 0x8000, 0x8000, 0, 0 },
{ 249, 0xff00, 0, 0, 0, 0 },
{ 250, 0, 0xff00, 0, 0, 0 },
{ 251, 0xff00, 0xff00, 0, 0, 0 },
{ 252, 0, 0, 0xff00, 0, 0 },
{ 253, 0xff00, 0, 0xff00, 0, 0 },
{ 254, 0, 0xff00, 0xff00, 0, 0 },
{ 255, 0xff00, 0xff00, 0xff00, 0, 0 }
};
#define NUM_DESKTOP_COLORS sizeof citems / sizeof citems[0]
int i;
#else
unsigned short zero = 0, ones = 0xFFFF;
#endif
Pixel wp, bp;
VisualPtr pVisual;
ColormapPtr cmap;
int alloctype;
for (pVisual = pScreen->visuals;
pVisual->vid != pScreen->rootVisual;
pVisual++)
;
if (pScreen->rootDepth == 1 || (pVisual->class & DynamicClass))
alloctype = AllocNone;
else
alloctype = AllocAll;
if (CreateColormap(pScreen->defColormap, pScreen, pVisual, &cmap,
alloctype, 0) != Success)
return FALSE;
if (pScreen->rootDepth > 1) {
wp = pScreen->whitePixel;
bp = pScreen->blackPixel;
#ifdef WIN32_not_tog
for (i = 0; i < NUM_DESKTOP_COLORS; i++) {
if (AllocColor (cmap,
&citems[i].red, &citems[i].green, &citems[i].blue,
&citems[i].pixel, 0) != Success)
return FALSE;
}
#else
if ((AllocColor(cmap, &ones, &ones, &ones, &wp, 0) !=
Success) ||
(AllocColor(cmap, &zero, &zero, &zero, &bp, 0) !=
Success))
return FALSE;
pScreen->whitePixel = wp;
pScreen->blackPixel = bp;
#endif
}
(*pScreen->InstallColormap)(cmap);
return TRUE;
}
/*
* Default true color bitmasks, should be overridden by
* driver
*/
#define _RZ(d) ((d + 2) / 3)
#define _RS(d) 0
#define _RM(d) ((1 << _RZ(d)) - 1)
#define _GZ(d) ((d - _RZ(d) + 1) / 2)
#define _GS(d) _RZ(d)
#define _GM(d) (((1 << _GZ(d)) - 1) << _GS(d))
#define _BZ(d) (d - _RZ(d) - _GZ(d))
#define _BS(d) (_RZ(d) + _GZ(d))
#define _BM(d) (((1 << _BZ(d)) - 1) << _BS(d))
#define _CE(d) (1 << _RZ(d))
typedef struct _miVisuals {
struct _miVisuals *next;
int depth;
int bitsPerRGB;
int visuals;
int count;
int preferredCVC;
Pixel redMask, greenMask, blueMask;
} miVisualsRec, *miVisualsPtr;
static int miVisualPriority[] = {
PseudoColor, GrayScale, StaticColor, TrueColor, DirectColor, StaticGray
};
#define NUM_PRIORITY 6
static miVisualsPtr miVisuals;
_X_EXPORT void
miClearVisualTypes(void)
{
miVisualsPtr v;
while ((v = miVisuals)) {
miVisuals = v->next;
xfree(v);
}
}
_X_EXPORT Bool
miSetVisualTypesAndMasks(int depth, int visuals, int bitsPerRGB,
int preferredCVC,
Pixel redMask, Pixel greenMask, Pixel blueMask)
{
miVisualsPtr new, *prev, v;
int count;
new = (miVisualsPtr) xalloc (sizeof *new);
if (!new)
return FALSE;
if (!redMask || !greenMask || !blueMask)
{
redMask = _RM(depth);
greenMask = _GM(depth);
blueMask = _BM(depth);
}
new->next = 0;
new->depth = depth;
new->visuals = visuals;
new->bitsPerRGB = bitsPerRGB;
new->preferredCVC = preferredCVC;
new->redMask = redMask;
new->greenMask = greenMask;
new->blueMask = blueMask;
count = (visuals >> 1) & 033333333333;
count = visuals - count - ((count >> 1) & 033333333333);
count = (((count + (count >> 3)) & 030707070707) % 077); /* HAKMEM 169 */
new->count = count;
for (prev = &miVisuals; (v = *prev); prev = &v->next);
*prev = new;
return TRUE;
}
_X_EXPORT Bool
miSetVisualTypes(int depth, int visuals, int bitsPerRGB, int preferredCVC)
{
return miSetVisualTypesAndMasks (depth, visuals, bitsPerRGB,
preferredCVC, 0, 0, 0);
}
_X_EXPORT int
miGetDefaultVisualMask(int depth)
{
if (depth > MAX_PSEUDO_DEPTH)
return LARGE_VISUALS;
else if (depth >= MIN_TRUE_DEPTH)
return ALL_VISUALS;
else if (depth == 1)
return StaticGrayMask;
else
return SMALL_VISUALS;
}
static Bool
miVisualTypesSet (int depth)
{
miVisualsPtr visuals;
for (visuals = miVisuals; visuals; visuals = visuals->next)
if (visuals->depth == depth)
return TRUE;
return FALSE;
}
_X_EXPORT Bool
miSetPixmapDepths (void)
{
int d, f;
/* Add any unlisted depths from the pixmap formats */
for (f = 0; f < screenInfo.numPixmapFormats; f++)
{
d = screenInfo.formats[f].depth;
if (!miVisualTypesSet (d))
{
if (!miSetVisualTypes (d, 0, 0, -1))
return FALSE;
}
}
return TRUE;
}
/*
* Distance to least significant one bit
*/
static int
maskShift (Pixel p)
{
int s;
if (!p) return 0;
s = 0;
while (!(p & 1))
{
s++;
p >>= 1;
}
return s;
}
/*
* Given a list of formats for a screen, create a list
* of visuals and depths for the screen which corespond to
* the set which can be used with this version of cfb.
*/
_X_EXPORT Bool
miInitVisuals(VisualPtr *visualp, DepthPtr *depthp, int *nvisualp,
int *ndepthp, int *rootDepthp, VisualID *defaultVisp,
unsigned long sizes, int bitsPerRGB, int preferredVis)
{
int i, j = 0, k;
VisualPtr visual;
DepthPtr depth;
VisualID *vid;
int d, b;
int f;
int ndepth, nvisual;
int nvtype;
int vtype;
miVisualsPtr visuals, nextVisuals;
int *preferredCVCs, *prefp;
int first_depth;
/* none specified, we'll guess from pixmap formats */
if (!miVisuals)
{
for (f = 0; f < screenInfo.numPixmapFormats; f++)
{
d = screenInfo.formats[f].depth;
b = screenInfo.formats[f].bitsPerPixel;
if (sizes & (1 << (b - 1)))
vtype = miGetDefaultVisualMask(d);
else
vtype = 0;
if (!miSetVisualTypes (d, vtype, bitsPerRGB, -1))
return FALSE;
}
}
nvisual = 0;
ndepth = 0;
for (visuals = miVisuals; visuals; visuals = nextVisuals)
{
nextVisuals = visuals->next;
ndepth++;
nvisual += visuals->count;
}
depth = (DepthPtr) xalloc (ndepth * sizeof (DepthRec));
visual = (VisualPtr) xalloc (nvisual * sizeof (VisualRec));
preferredCVCs = (int *)xalloc(ndepth * sizeof(int));
if (!depth || !visual || !preferredCVCs)
{
xfree (depth);
xfree (visual);
xfree (preferredCVCs);
return FALSE;
}
*depthp = depth;
*visualp = visual;
*ndepthp = ndepth;
*nvisualp = nvisual;
prefp = preferredCVCs;
for (visuals = miVisuals; visuals; visuals = nextVisuals)
{
nextVisuals = visuals->next;
d = visuals->depth;
vtype = visuals->visuals;
nvtype = visuals->count;
*prefp = visuals->preferredCVC;
prefp++;
vid = NULL;
if (nvtype)
{
vid = (VisualID *) xalloc (nvtype * sizeof (VisualID));
if (!vid) {
xfree(preferredCVCs);
return FALSE;
}
}
depth->depth = d;
depth->numVids = nvtype;
depth->vids = vid;
depth++;
for (i = 0; i < NUM_PRIORITY; i++) {
if (! (vtype & (1 << miVisualPriority[i])))
continue;
visual->class = miVisualPriority[i];
visual->bitsPerRGBValue = visuals->bitsPerRGB;
visual->ColormapEntries = 1 << d;
visual->nplanes = d;
visual->vid = *vid = FakeClientID (0);
switch (visual->class) {
case PseudoColor:
case GrayScale:
case StaticGray:
visual->redMask = 0;
visual->greenMask = 0;
visual->blueMask = 0;
visual->offsetRed = 0;
visual->offsetGreen = 0;
visual->offsetBlue = 0;
break;
case DirectColor:
case TrueColor:
visual->ColormapEntries = _CE(d);
/* fall through */
case StaticColor:
visual->redMask = visuals->redMask;
visual->greenMask = visuals->greenMask;
visual->blueMask = visuals->blueMask;
visual->offsetRed = maskShift (visuals->redMask);
visual->offsetGreen = maskShift (visuals->greenMask);
visual->offsetBlue = maskShift (visuals->blueMask);
}
vid++;
visual++;
}
xfree (visuals);
}
miVisuals = NULL;
visual = *visualp;
depth = *depthp;
/*
* if we did not supplyied by a preferred visual class
* check if there is a preferred class in one of the depth
* structures - if there is, we want to start looking for the
* default visual/depth from that depth.
*/
first_depth = 0;
if (preferredVis < 0 && defaultColorVisualClass < 0 ) {
for (i = 0; i < ndepth; i++) {
if (preferredCVCs[i] >= 0) {
first_depth = i;
break;
}
}
}
for (i = first_depth; i < ndepth; i++)
{
int prefColorVisualClass = -1;
if (defaultColorVisualClass >= 0)
prefColorVisualClass = defaultColorVisualClass;
else if (preferredVis >= 0)
prefColorVisualClass = preferredVis;
else if (preferredCVCs[i] >= 0)
prefColorVisualClass = preferredCVCs[i];
if (*rootDepthp && *rootDepthp != depth[i].depth)
continue;
for (j = 0; j < depth[i].numVids; j++)
{
for (k = 0; k < nvisual; k++)
if (visual[k].vid == depth[i].vids[j])
break;
if (k == nvisual)
continue;
if (prefColorVisualClass < 0 ||
visual[k].class == prefColorVisualClass)
break;
}
if (j != depth[i].numVids)
break;
}
if (i == ndepth) {
i = 0;
j = 0;
}
*rootDepthp = depth[i].depth;
*defaultVisp = depth[i].vids[j];
xfree(preferredCVCs);
return TRUE;
}
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