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-rw-r--r--xorg-server/fb/fbcmap.c591
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diff --git a/xorg-server/fb/fbcmap.c b/xorg-server/fb/fbcmap.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.
+
+********************************************************/
+
+
+#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 "fb.h"
+
+#ifdef XFree86Server
+#error "You should be compiling fbcmap_mi.c instead of fbcmap.c!"
+#endif
+
+
+
+ColormapPtr FbInstalledMaps[MAXSCREENS];
+
+int
+fbListInstalledColormaps(ScreenPtr pScreen, Colormap *pmaps)
+{
+ /* By the time we are processing requests, we can guarantee that there
+ * is always a colormap installed */
+ *pmaps = FbInstalledMaps[pScreen->myNum]->mid;
+ return (1);
+}
+
+
+void
+fbInstallColormap(ColormapPtr pmap)
+{
+ int index = pmap->pScreen->myNum;
+ ColormapPtr oldpmap = FbInstalledMaps[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 */
+ FbInstalledMaps[index] = pmap;
+ WalkTree(pmap->pScreen, TellGainedMap, (char *)&pmap->mid);
+ }
+}
+
+void
+fbUninstallColormap(ColormapPtr pmap)
+{
+ int index = pmap->pScreen->myNum;
+ ColormapPtr curpmap = FbInstalledMaps[index];
+
+ if(pmap == curpmap)
+ {
+ if (pmap->mid != pmap->pScreen->defColormap)
+ {
+ curpmap = (ColormapPtr) LookupIDByType(pmap->pScreen->defColormap,
+ RT_COLORMAP);
+ (*pmap->pScreen->InstallColormap)(curpmap);
+ }
+ }
+}
+
+void
+fbResolveColor(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;
+ }
+}
+
+Bool
+fbInitializeColormap(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 n;
+ unsigned r, g, b;
+ unsigned red, green, blue;
+
+ for (n = 0; n*n*n < pVisual->ColormapEntries; n++)
+ ;
+ n--;
+ i = 0;
+ for (r = 0; r < n; r++)
+ {
+ red = (((r * 65535 / (n - 1)) >> shift) * 65535) / lim;
+ for (g = 0; g < n; g++)
+ {
+ green = (((g * 65535 / (n - 1)) >> shift) * 65535) / lim;
+ for (b = 0; b < n; b++)
+ {
+ blue = (((b * 65535 / (n - 1)) >> shift) * 65535) / lim;
+ pmap->red[i].co.local.red = red;
+ pmap->red[i].co.local.green = green;
+ pmap->red[i].co.local.blue = blue;
+ i++;
+ }
+ }
+ }
+ n = pVisual->ColormapEntries - i;
+ for (r = 0; r < n; r++)
+ {
+ red = (((r * 65535 / (n - 1)) >> shift) * 65535) / lim;
+ pmap->red[i].co.local.red = red;
+ pmap->red[i].co.local.green = red;
+ pmap->red[i].co.local.blue = red;
+ i++;
+ }
+ }
+ 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; \
+}
+
+int
+fbExpandDirectColors (ColormapPtr pmap,
+ int ndef,
+ xColorItem *indefs,
+ xColorItem *outdefs)
+{
+ 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
+fbCreateDefColormap(ScreenPtr pScreen)
+{
+ unsigned short zero = 0, ones = 0xFFFF;
+ VisualPtr pVisual;
+ ColormapPtr cmap;
+ Pixel wp, bp;
+
+ 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;
+ wp = pScreen->whitePixel;
+ bp = pScreen->blackPixel;
+ 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;
+ (*pScreen->InstallColormap)(cmap);
+ return TRUE;
+}
+
+extern int defaultColorVisualClass;
+
+#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))
+
+#define MAX_PSEUDO_DEPTH 10 /* largest DAC size I know */
+
+#define StaticGrayMask (1 << StaticGray)
+#define GrayScaleMask (1 << GrayScale)
+#define StaticColorMask (1 << StaticColor)
+#define PseudoColorMask (1 << PseudoColor)
+#define TrueColorMask (1 << TrueColor)
+#define DirectColorMask (1 << DirectColor)
+
+#define ALL_VISUALS (StaticGrayMask|\
+ GrayScaleMask|\
+ StaticColorMask|\
+ PseudoColorMask|\
+ TrueColorMask|\
+ DirectColorMask)
+
+#define LARGE_VISUALS (TrueColorMask|\
+ DirectColorMask)
+
+typedef struct _fbVisuals {
+ struct _fbVisuals *next;
+ int depth;
+ int bitsPerRGB;
+ int visuals;
+ int count;
+ Pixel redMask, greenMask, blueMask;
+} fbVisualsRec, *fbVisualsPtr;
+
+static const int fbVisualPriority[] = {
+ PseudoColor, DirectColor, GrayScale, StaticColor, TrueColor, StaticGray
+};
+
+#define NUM_PRIORITY 6
+
+static fbVisualsPtr fbVisuals;
+
+static int
+popCount (int i)
+{
+ int count;
+
+ count = (i >> 1) & 033333333333;
+ count = i - count - ((count >> 1) & 033333333333);
+ count = (((count + (count >> 3)) & 030707070707) % 077); /* HAKMEM 169 */
+ return count;
+}
+
+/*
+ * 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;
+}
+
+Bool
+fbSetVisualTypesAndMasks (int depth, int visuals, int bitsPerRGB,
+ Pixel redMask, Pixel greenMask, Pixel blueMask)
+{
+ fbVisualsPtr new, *prev, v;
+
+ new = (fbVisualsPtr) 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->redMask = redMask;
+ new->greenMask = greenMask;
+ new->blueMask = blueMask;
+ new->count = popCount (visuals);
+ for (prev = &fbVisuals; (v = *prev); prev = &v->next);
+ *prev = new;
+ return TRUE;
+}
+
+Bool
+fbHasVisualTypes (int depth)
+{
+ fbVisualsPtr v;
+
+ for (v = fbVisuals; v; v = v->next)
+ if (v->depth == depth)
+ return TRUE;
+ return FALSE;
+}
+
+Bool
+fbSetVisualTypes (int depth, int visuals, int bitsPerRGB)
+{
+ return fbSetVisualTypesAndMasks (depth, visuals, bitsPerRGB,
+ _RM(depth), _GM(depth), _BM(depth));
+}
+
+/*
+ * Given a list of formats for a screen, create a list
+ * of visuals and depths for the screen which coorespond to
+ * the set which can be used with this version of fb.
+ */
+
+Bool
+fbInitVisuals (VisualPtr *visualp,
+ DepthPtr *depthp,
+ int *nvisualp,
+ int *ndepthp,
+ int *rootDepthp,
+ VisualID *defaultVisp,
+ unsigned long sizes,
+ int bitsPerRGB)
+{
+ int i, j = 0, k;
+ VisualPtr visual;
+ DepthPtr depth;
+ VisualID *vid;
+ int d, b;
+ int f;
+ int ndepth, nvisual;
+ int nvtype;
+ int vtype;
+ fbVisualsPtr visuals, nextVisuals;
+
+ /* none specified, we'll guess from pixmap formats */
+ if (!fbVisuals)
+ {
+ for (f = 0; f < screenInfo.numPixmapFormats; f++)
+ {
+ d = screenInfo.formats[f].depth;
+ b = screenInfo.formats[f].bitsPerPixel;
+ if (sizes & (1 << (b - 1)))
+ {
+ if (d > MAX_PSEUDO_DEPTH)
+ vtype = LARGE_VISUALS;
+ else if (d == 1)
+ vtype = StaticGrayMask;
+ else
+ vtype = ALL_VISUALS;
+ }
+ else
+ vtype = 0;
+ if (!fbSetVisualTypes (d, vtype, bitsPerRGB))
+ return FALSE;
+ }
+ }
+ nvisual = 0;
+ ndepth = 0;
+ for (visuals = fbVisuals; visuals; visuals = nextVisuals)
+ {
+ nextVisuals = visuals->next;
+ ndepth++;
+ nvisual += visuals->count;
+ }
+ depth = (DepthPtr) xalloc (ndepth * sizeof (DepthRec));
+ visual = (VisualPtr) xalloc (nvisual * sizeof (VisualRec));
+ if (!depth || !visual)
+ {
+ xfree (depth);
+ xfree (visual);
+ return FALSE;
+ }
+ *depthp = depth;
+ *visualp = visual;
+ *ndepthp = ndepth;
+ *nvisualp = nvisual;
+ for (visuals = fbVisuals; visuals; visuals = nextVisuals)
+ {
+ nextVisuals = visuals->next;
+ d = visuals->depth;
+ vtype = visuals->visuals;
+ nvtype = visuals->count;
+ vid = NULL;
+ if (nvtype)
+ {
+ vid = (VisualID *) xalloc (nvtype * sizeof (VisualID));
+ if (!vid)
+ return FALSE;
+ }
+ depth->depth = d;
+ depth->numVids = nvtype;
+ depth->vids = vid;
+ depth++;
+ for (i = 0; i < NUM_PRIORITY; i++) {
+ if (! (vtype & (1 << fbVisualPriority[i])))
+ continue;
+ visual->class = fbVisualPriority[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:
+ case StaticColor:
+ 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);
+ 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);
+ }
+ fbVisuals = NULL;
+ visual = *visualp;
+ depth = *depthp;
+ for (i = 0; i < ndepth; 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 (defaultColorVisualClass < 0 ||
+ visual[k].class == defaultColorVisualClass)
+ break;
+ }
+ if (j != depth[i].numVids)
+ break;
+ }
+ if (i == ndepth) {
+ for (i = 0; i < ndepth; i++)
+ {
+ if (depth[i].numVids)
+ break;
+ }
+ if (i == ndepth)
+ return FALSE;
+ j = 0;
+ }
+ *rootDepthp = depth[i].depth;
+ *defaultVisp = depth[i].vids[j];
+ return TRUE;
+}
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