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+/* $XdotOrg: xc/programs/Xserver/hw/xfree86/common/xf86cmap.c,v 1.9 2005/09/05 07:43:51 daniels Exp $ */
+/* $XFree86: xc/programs/Xserver/hw/xfree86/common/xf86cmap.c,v 1.25 2003/10/17 20:02:12 alanh Exp $ */
+/*
+ * Copyright (c) 1998-2001 by The XFree86 Project, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Except as contained in this notice, the name of the copyright holder(s)
+ * and author(s) shall not be used in advertising or otherwise to promote
+ * the sale, use or other dealings in this Software without prior written
+ * authorization from the copyright holder(s) and author(s).
+ */
+
+#ifdef HAVE_XORG_CONFIG_H
+#include <xorg-config.h>
+#endif
+
+#if defined(_XOPEN_SOURCE) || defined(__QNXNTO__) \
+ || (defined(sun) && defined(__SVR4))
+#include <math.h>
+#else
+#define _XOPEN_SOURCE /* to get prototype for pow on some systems */
+#include <math.h>
+#undef _XOPEN_SOURCE
+#endif
+
+#include <X11/X.h>
+#include "misc.h"
+#include <X11/Xproto.h>
+#include "colormapst.h"
+#include "scrnintstr.h"
+
+#include "resource.h"
+
+#include "xf86.h"
+#include "xf86_OSproc.h"
+#include "xf86str.h"
+#include "micmap.h"
+
+#ifdef XFreeXDGA
+#define _XF86DGA_SERVER_
+#include <X11/extensions/xf86dgastr.h>
+#include "dgaproc.h"
+#endif
+
+#include "xf86cmap.h"
+
+#define SCREEN_PROLOGUE(pScreen, field) ((pScreen)->field = \
+ ((CMapScreenPtr) (pScreen)->devPrivates[CMapScreenIndex].ptr)->field)
+#define SCREEN_EPILOGUE(pScreen, field, wrapper)\
+ ((pScreen)->field = wrapper)
+
+#define LOAD_PALETTE(pmap, index) \
+ ((pmap == miInstalledMaps[index]) && \
+ ((pScreenPriv->flags & CMAP_LOAD_EVEN_IF_OFFSCREEN) || \
+ xf86Screens[index]->vtSema || pScreenPriv->isDGAmode))
+
+
+typedef struct _CMapLink {
+ ColormapPtr cmap;
+ struct _CMapLink *next;
+} CMapLink, *CMapLinkPtr;
+
+typedef struct {
+ ScrnInfoPtr pScrn;
+ CloseScreenProcPtr CloseScreen;
+ CreateColormapProcPtr CreateColormap;
+ DestroyColormapProcPtr DestroyColormap;
+ InstallColormapProcPtr InstallColormap;
+ StoreColorsProcPtr StoreColors;
+ Bool (*EnterVT)(int, int);
+ Bool (*SwitchMode)(int, DisplayModePtr, int);
+ int (*SetDGAMode)(int, int, DGADevicePtr);
+ int maxColors;
+ int sigRGBbits;
+ int gammaElements;
+ LOCO *gamma;
+ int *PreAllocIndices;
+ CMapLinkPtr maps;
+ unsigned int flags;
+ Bool isDGAmode;
+} CMapScreenRec, *CMapScreenPtr;
+
+typedef struct {
+ int numColors;
+ LOCO *colors;
+ Bool recalculate;
+ int overscan;
+} CMapColormapRec, *CMapColormapPtr;
+
+static unsigned long CMapGeneration = 0;
+static int CMapScreenIndex = -1;
+static int CMapColormapIndex = -1;
+
+static void CMapInstallColormap(ColormapPtr);
+static void CMapStoreColors(ColormapPtr, int, xColorItem *);
+static Bool CMapCloseScreen (int, ScreenPtr);
+static Bool CMapCreateColormap (ColormapPtr);
+static void CMapDestroyColormap (ColormapPtr);
+
+static Bool CMapEnterVT(int, int);
+static Bool CMapSwitchMode(int, DisplayModePtr, int);
+static int CMapSetDGAMode(int, int, DGADevicePtr);
+static int CMapChangeGamma(int, Gamma);
+
+static void ComputeGamma(CMapScreenPtr);
+static Bool CMapAllocateColormapPrivate(ColormapPtr);
+static Bool CMapInitDefMap(ColormapPtr,int);
+static void CMapRefreshColors(ColormapPtr, int, int*);
+static void CMapSetOverscan(ColormapPtr, int, int *);
+static void CMapReinstallMap(ColormapPtr);
+static void CMapUnwrapScreen(ScreenPtr pScreen);
+
+
+
+Bool xf86HandleColormaps(
+ ScreenPtr pScreen,
+ int maxColors,
+ int sigRGBbits,
+ xf86LoadPaletteProc *loadPalette,
+ xf86SetOverscanProc *setOverscan,
+ unsigned int flags
+){
+ ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
+ ColormapPtr pDefMap = NULL;
+ CMapScreenPtr pScreenPriv;
+ LOCO *gamma;
+ int *indices;
+ int elements;
+
+ if(!maxColors || !sigRGBbits || !loadPalette)
+ return FALSE;
+
+ if(CMapGeneration != serverGeneration) {
+ if(((CMapScreenIndex = AllocateScreenPrivateIndex()) < 0) ||
+ ((CMapColormapIndex = AllocateColormapPrivateIndex(
+ CMapInitDefMap)) < 0))
+ return FALSE;
+ CMapGeneration = serverGeneration;
+ }
+
+ elements = 1 << sigRGBbits;
+
+ if(!(gamma = xalloc(elements * sizeof(LOCO))))
+ return FALSE;
+
+ if(!(indices = xalloc(maxColors * sizeof(int)))) {
+ xfree(gamma);
+ return FALSE;
+ }
+
+ if(!(pScreenPriv = xalloc(sizeof(CMapScreenRec)))) {
+ xfree(gamma);
+ xfree(indices);
+ return FALSE;
+ }
+
+ pScreen->devPrivates[CMapScreenIndex].ptr = (pointer)pScreenPriv;
+
+ pScreenPriv->CloseScreen = pScreen->CloseScreen;
+ pScreenPriv->CreateColormap = pScreen->CreateColormap;
+ pScreenPriv->DestroyColormap = pScreen->DestroyColormap;
+ pScreenPriv->InstallColormap = pScreen->InstallColormap;
+ pScreenPriv->StoreColors = pScreen->StoreColors;
+ pScreen->CloseScreen = CMapCloseScreen;
+ pScreen->CreateColormap = CMapCreateColormap;
+ pScreen->DestroyColormap = CMapDestroyColormap;
+ pScreen->InstallColormap = CMapInstallColormap;
+ pScreen->StoreColors = CMapStoreColors;
+
+ pScreenPriv->pScrn = pScrn;
+ pScrn->LoadPalette = loadPalette;
+ pScrn->SetOverscan = setOverscan;
+ pScreenPriv->maxColors = maxColors;
+ pScreenPriv->sigRGBbits = sigRGBbits;
+ pScreenPriv->gammaElements = elements;
+ pScreenPriv->gamma = gamma;
+ pScreenPriv->PreAllocIndices = indices;
+ pScreenPriv->maps = NULL;
+ pScreenPriv->flags = flags;
+ pScreenPriv->isDGAmode = FALSE;
+
+ pScreenPriv->EnterVT = pScrn->EnterVT;
+ pScreenPriv->SwitchMode = pScrn->SwitchMode;
+ pScreenPriv->SetDGAMode = pScrn->SetDGAMode;
+
+ if (!(flags & CMAP_LOAD_EVEN_IF_OFFSCREEN)) {
+ pScrn->EnterVT = CMapEnterVT;
+ if ((flags & CMAP_RELOAD_ON_MODE_SWITCH) && pScrn->SwitchMode)
+ pScrn->SwitchMode = CMapSwitchMode;
+ }
+#ifdef XFreeXDGA
+ pScrn->SetDGAMode = CMapSetDGAMode;
+#endif
+ pScrn->ChangeGamma = CMapChangeGamma;
+
+ ComputeGamma(pScreenPriv);
+
+ /* get the default map */
+
+ pDefMap = (ColormapPtr) LookupIDByType(pScreen->defColormap, RT_COLORMAP);
+
+ if(!CMapAllocateColormapPrivate(pDefMap)) {
+ CMapUnwrapScreen(pScreen);
+ return FALSE;
+ }
+
+ /* Force the initial map to be loaded */
+ miInstalledMaps[pScreen->myNum] = NULL;
+ CMapInstallColormap(pDefMap);
+ return TRUE;
+}
+
+static Bool
+CMapInitDefMap(ColormapPtr cmap, int index)
+{
+ return TRUE;
+}
+
+
+/**** Screen functions ****/
+
+
+static Bool
+CMapCloseScreen (int i, ScreenPtr pScreen)
+{
+ CMapUnwrapScreen(pScreen);
+
+ return (*pScreen->CloseScreen) (i, pScreen);
+}
+
+static Bool
+CMapColormapUseMax(VisualPtr pVisual, CMapScreenPtr pScreenPriv)
+{
+ if (pVisual->nplanes > 16)
+ return TRUE;
+ return ((1 << pVisual->nplanes) > pScreenPriv->maxColors);
+}
+
+static Bool
+CMapAllocateColormapPrivate(ColormapPtr pmap)
+{
+ CMapScreenPtr pScreenPriv =
+ (CMapScreenPtr) pmap->pScreen->devPrivates[CMapScreenIndex].ptr;
+ CMapColormapPtr pColPriv;
+ CMapLinkPtr pLink;
+ int numColors;
+ LOCO *colors;
+
+ if (CMapColormapUseMax(pmap->pVisual, pScreenPriv))
+ numColors = pmap->pVisual->ColormapEntries;
+ else
+ numColors = 1 << pmap->pVisual->nplanes;
+
+ if(!(colors = xalloc(numColors * sizeof(LOCO))))
+ return FALSE;
+
+ if(!(pColPriv = xalloc(sizeof(CMapColormapRec)))) {
+ xfree(colors);
+ return FALSE;
+ }
+
+ pmap->devPrivates[CMapColormapIndex].ptr = (pointer)pColPriv;
+
+ pColPriv->numColors = numColors;
+ pColPriv->colors = colors;
+ pColPriv->recalculate = TRUE;
+ pColPriv->overscan = -1;
+
+ /* add map to list */
+ pLink = xalloc(sizeof(CMapLink));
+ if(pLink) {
+ pLink->cmap = pmap;
+ pLink->next = pScreenPriv->maps;
+ pScreenPriv->maps = pLink;
+ }
+
+ return TRUE;
+}
+
+static Bool
+CMapCreateColormap (ColormapPtr pmap)
+{
+ ScreenPtr pScreen = pmap->pScreen;
+ CMapScreenPtr pScreenPriv =
+ (CMapScreenPtr)pScreen->devPrivates[CMapScreenIndex].ptr;
+ Bool ret = FALSE;
+
+ pScreen->CreateColormap = pScreenPriv->CreateColormap;
+ if((*pScreen->CreateColormap)(pmap)) {
+ if(CMapAllocateColormapPrivate(pmap))
+ ret = TRUE;
+ }
+ pScreen->CreateColormap = CMapCreateColormap;
+
+ return ret;
+}
+
+static void
+CMapDestroyColormap (ColormapPtr cmap)
+{
+ ScreenPtr pScreen = cmap->pScreen;
+ CMapScreenPtr pScreenPriv =
+ (CMapScreenPtr) pScreen->devPrivates[CMapScreenIndex].ptr;
+ CMapColormapPtr pColPriv =
+ (CMapColormapPtr) cmap->devPrivates[CMapColormapIndex].ptr;
+ CMapLinkPtr prevLink = NULL, pLink = pScreenPriv->maps;
+
+ if(pColPriv) {
+ if(pColPriv->colors) xfree(pColPriv->colors);
+ xfree(pColPriv);
+ }
+
+ /* remove map from list */
+ while(pLink) {
+ if(pLink->cmap == cmap) {
+ if(prevLink)
+ prevLink->next = pLink->next;
+ else
+ pScreenPriv->maps = pLink->next;
+ xfree(pLink);
+ break;
+ }
+ prevLink = pLink;
+ pLink = pLink->next;
+ }
+
+ if(pScreenPriv->DestroyColormap) {
+ pScreen->DestroyColormap = pScreenPriv->DestroyColormap;
+ (*pScreen->DestroyColormap)(cmap);
+ pScreen->DestroyColormap = CMapDestroyColormap;
+ }
+}
+
+
+
+static void
+CMapStoreColors(
+ ColormapPtr pmap,
+ int ndef,
+ xColorItem *pdefs
+){
+ ScreenPtr pScreen = pmap->pScreen;
+ VisualPtr pVisual = pmap->pVisual;
+ CMapScreenPtr pScreenPriv =
+ (CMapScreenPtr) pScreen->devPrivates[CMapScreenIndex].ptr;
+ int *indices = pScreenPriv->PreAllocIndices;
+ int num = ndef;
+
+ /* At the moment this isn't necessary since there's nobody below us */
+ pScreen->StoreColors = pScreenPriv->StoreColors;
+ (*pScreen->StoreColors)(pmap, ndef, pdefs);
+ pScreen->StoreColors = CMapStoreColors;
+
+ /* should never get here for these */
+ if( (pVisual->class == TrueColor) ||
+ (pVisual->class == StaticColor) ||
+ (pVisual->class == StaticGray))
+ return;
+
+ if(pVisual->class == DirectColor) {
+ CMapColormapPtr pColPriv =
+ (CMapColormapPtr) pmap->devPrivates[CMapColormapIndex].ptr;
+ int i;
+
+ if (CMapColormapUseMax(pVisual, pScreenPriv)) {
+ int index;
+
+ num = 0;
+ while(ndef--) {
+ if(pdefs[ndef].flags & DoRed) {
+ index = (pdefs[ndef].pixel & pVisual->redMask) >>
+ pVisual->offsetRed;
+ i = num;
+ while(i--)
+ if(indices[i] == index) break;
+ if(i == -1)
+ indices[num++] = index;
+ }
+ if(pdefs[ndef].flags & DoGreen) {
+ index = (pdefs[ndef].pixel & pVisual->greenMask) >>
+ pVisual->offsetGreen;
+ i = num;
+ while(i--)
+ if(indices[i] == index) break;
+ if(i == -1)
+ indices[num++] = index;
+ }
+ if(pdefs[ndef].flags & DoBlue) {
+ index = (pdefs[ndef].pixel & pVisual->blueMask) >>
+ pVisual->offsetBlue;
+ i = num;
+ while(i--)
+ if(indices[i] == index) break;
+ if(i == -1)
+ indices[num++] = index;
+ }
+ }
+
+ } else {
+ /* not really as overkill as it seems */
+ num = pColPriv->numColors;
+ for(i = 0; i < pColPriv->numColors; i++)
+ indices[i] = i;
+ }
+ } else {
+ while(ndef--)
+ indices[ndef] = pdefs[ndef].pixel;
+ }
+
+ CMapRefreshColors(pmap, num, indices);
+}
+
+
+static void
+CMapInstallColormap(ColormapPtr pmap)
+{
+ ScreenPtr pScreen = pmap->pScreen;
+ int index = pScreen->myNum;
+ CMapScreenPtr pScreenPriv =
+ (CMapScreenPtr) pScreen->devPrivates[CMapScreenIndex].ptr;
+
+ if (pmap == miInstalledMaps[index])
+ return;
+
+ pScreen->InstallColormap = pScreenPriv->InstallColormap;
+ (*pScreen->InstallColormap)(pmap);
+ pScreen->InstallColormap = CMapInstallColormap;
+
+ /* Important. We let the lower layers, namely DGA,
+ overwrite the choice of Colormap to install */
+ if (miInstalledMaps[index])
+ pmap = miInstalledMaps[index];
+
+ if (!(pScreenPriv->flags & CMAP_PALETTED_TRUECOLOR) &&
+ (pmap->pVisual->class == TrueColor) &&
+ CMapColormapUseMax(pmap->pVisual, pScreenPriv))
+ return;
+
+ if(LOAD_PALETTE(pmap, index))
+ CMapReinstallMap(pmap);
+}
+
+
+/**** ScrnInfoRec functions ****/
+
+static Bool
+CMapEnterVT(int index, int flags)
+{
+ ScreenPtr pScreen = screenInfo.screens[index];
+ CMapScreenPtr pScreenPriv =
+ (CMapScreenPtr) pScreen->devPrivates[CMapScreenIndex].ptr;
+
+ if((*pScreenPriv->EnterVT)(index, flags)) {
+ if(miInstalledMaps[index])
+ CMapReinstallMap(miInstalledMaps[index]);
+ return TRUE;
+ }
+ return FALSE;
+}
+
+
+static Bool
+CMapSwitchMode(int index, DisplayModePtr mode, int flags)
+{
+ ScreenPtr pScreen = screenInfo.screens[index];
+ CMapScreenPtr pScreenPriv =
+ (CMapScreenPtr) pScreen->devPrivates[CMapScreenIndex].ptr;
+
+ if((*pScreenPriv->SwitchMode)(index, mode, flags)) {
+ if(miInstalledMaps[index])
+ CMapReinstallMap(miInstalledMaps[index]);
+ return TRUE;
+ }
+ return FALSE;
+}
+
+#ifdef XFreeXDGA
+static int
+CMapSetDGAMode(int index, int num, DGADevicePtr dev)
+{
+ ScreenPtr pScreen = screenInfo.screens[index];
+ CMapScreenPtr pScreenPriv =
+ (CMapScreenPtr) pScreen->devPrivates[CMapScreenIndex].ptr;
+ int ret;
+
+ ret = (*pScreenPriv->SetDGAMode)(index, num, dev);
+
+ pScreenPriv->isDGAmode = DGAActive(index);
+
+ if(!pScreenPriv->isDGAmode && miInstalledMaps[index]
+ && xf86Screens[pScreen->myNum]->vtSema)
+ CMapReinstallMap(miInstalledMaps[index]);
+
+ return ret;
+}
+#endif
+
+
+/**** Utilities ****/
+
+static void
+CMapReinstallMap(ColormapPtr pmap)
+{
+ CMapScreenPtr pScreenPriv =
+ (CMapScreenPtr) pmap->pScreen->devPrivates[CMapScreenIndex].ptr;
+ CMapColormapPtr cmapPriv =
+ (CMapColormapPtr) pmap->devPrivates[CMapColormapIndex].ptr;
+ ScrnInfoPtr pScrn = xf86Screens[pmap->pScreen->myNum];
+ int i = cmapPriv->numColors;
+ int *indices = pScreenPriv->PreAllocIndices;
+
+ while(i--)
+ indices[i] = i;
+
+ if(cmapPriv->recalculate)
+ CMapRefreshColors(pmap, cmapPriv->numColors, indices);
+ else {
+ (*pScrn->LoadPalette)(pScrn, cmapPriv->numColors,
+ indices, cmapPriv->colors, pmap->pVisual);
+ if (pScrn->SetOverscan) {
+#ifdef DEBUGOVERSCAN
+ ErrorF("SetOverscan() called from CMapReinstallMap\n");
+#endif
+ pScrn->SetOverscan(pScrn, cmapPriv->overscan);
+ }
+ }
+
+ cmapPriv->recalculate = FALSE;
+}
+
+
+static void
+CMapRefreshColors(ColormapPtr pmap, int defs, int* indices)
+{
+ CMapScreenPtr pScreenPriv =
+ (CMapScreenPtr) pmap->pScreen->devPrivates[CMapScreenIndex].ptr;
+ CMapColormapPtr pColPriv =
+ (CMapColormapPtr) pmap->devPrivates[CMapColormapIndex].ptr;
+ VisualPtr pVisual = pmap->pVisual;
+ ScrnInfoPtr pScrn = xf86Screens[pmap->pScreen->myNum];
+ int numColors, i;
+ LOCO *gamma, *colors;
+ EntryPtr entry;
+ int reds, greens, blues, maxValue, index, shift;
+
+ numColors = pColPriv->numColors;
+ shift = 16 - pScreenPriv->sigRGBbits;
+ maxValue = (1 << pScreenPriv->sigRGBbits) - 1;
+ gamma = pScreenPriv->gamma;
+ colors = pColPriv->colors;
+
+ reds = pVisual->redMask >> pVisual->offsetRed;
+ greens = pVisual->greenMask >> pVisual->offsetGreen;
+ blues = pVisual->blueMask >> pVisual->offsetBlue;
+
+ switch(pVisual->class) {
+ case StaticGray:
+ for(i = 0; i <= numColors - 1; i++) {
+ index = i * maxValue / numColors;
+ colors[i].red = gamma[index].red;
+ colors[i].green = gamma[index].green;
+ colors[i].blue = gamma[index].blue;
+ }
+ break;
+ case TrueColor:
+ if (CMapColormapUseMax(pVisual, pScreenPriv)) {
+ for(i = 0; i <= reds; i++)
+ colors[i].red = gamma[i * maxValue / reds].red;
+ for(i = 0; i <= greens; i++)
+ colors[i].green = gamma[i * maxValue / greens].green;
+ for(i = 0; i <= blues; i++)
+ colors[i].blue = gamma[i * maxValue / blues].blue;
+ break;
+ }
+ for(i = 0; i < numColors; i++) {
+ colors[i].red = gamma[((i >> pVisual->offsetRed) & reds) *
+ maxValue / reds].red;
+ colors[i].green = gamma[((i >> pVisual->offsetGreen) & greens) *
+ maxValue / greens].green;
+ colors[i].blue = gamma[((i >> pVisual->offsetBlue) & blues) *
+ maxValue / blues].blue;
+ }
+ break;
+ case StaticColor:
+ case PseudoColor:
+ case GrayScale:
+ for(i = 0; i < defs; i++) {
+ index = indices[i];
+ entry = (EntryPtr)&pmap->red[index];
+
+ if(entry->fShared) {
+ colors[index].red =
+ gamma[entry->co.shco.red->color >> shift].red;
+ colors[index].green =
+ gamma[entry->co.shco.green->color >> shift].green;
+ colors[index].blue =
+ gamma[entry->co.shco.blue->color >> shift].blue;
+ } else {
+ colors[index].red =
+ gamma[entry->co.local.red >> shift].red;
+ colors[index].green =
+ gamma[entry->co.local.green >> shift].green;
+ colors[index].blue =
+ gamma[entry->co.local.blue >> shift].blue;
+ }
+ }
+ break;
+ case DirectColor:
+ if (CMapColormapUseMax(pVisual, pScreenPriv)) {
+ for(i = 0; i < defs; i++) {
+ index = indices[i];
+ if(index <= reds)
+ colors[index].red =
+ gamma[pmap->red[index].co.local.red >> shift].red;
+ if(index <= greens)
+ colors[index].green =
+ gamma[pmap->green[index].co.local.green >> shift].green;
+ if(index <= blues)
+ colors[index].blue =
+ gamma[pmap->blue[index].co.local.blue >> shift].blue;
+
+ }
+ break;
+ }
+ for(i = 0; i < defs; i++) {
+ index = indices[i];
+
+ colors[index].red = gamma[pmap->red[
+ (index >> pVisual->offsetRed) & reds
+ ].co.local.red >> shift].red;
+ colors[index].green = gamma[pmap->green[
+ (index >> pVisual->offsetGreen) & greens
+ ].co.local.green >> shift].green;
+ colors[index].blue = gamma[pmap->blue[
+ (index >> pVisual->offsetBlue) & blues
+ ].co.local.blue >> shift].blue;
+ }
+ break;
+ }
+
+
+ if(LOAD_PALETTE(pmap, pmap->pScreen->myNum))
+ (*pScrn->LoadPalette)(pScreenPriv->pScrn, defs, indices,
+ colors, pmap->pVisual);
+
+ if (pScrn->SetOverscan)
+ CMapSetOverscan(pmap, defs, indices);
+
+}
+
+static Bool
+CMapCompareColors(LOCO *color1, LOCO *color2)
+{
+ /* return TRUE if the color1 is "closer" to black than color2 */
+#ifdef DEBUGOVERSCAN
+ ErrorF("#%02x%02x%02x vs #%02x%02x%02x (%d vs %d)\n",
+ color1->red, color1->green, color1->blue,
+ color2->red, color2->green, color2->blue,
+ color1->red + color1->green + color1->blue,
+ color2->red + color2->green + color2->blue);
+#endif
+ return (color1->red + color1->green + color1->blue <
+ color2->red + color2->green + color2->blue);
+}
+
+static void
+CMapSetOverscan(ColormapPtr pmap, int defs, int *indices)
+{
+ CMapScreenPtr pScreenPriv =
+ (CMapScreenPtr) pmap->pScreen->devPrivates[CMapScreenIndex].ptr;
+ CMapColormapPtr pColPriv =
+ (CMapColormapPtr) pmap->devPrivates[CMapColormapIndex].ptr;
+ ScrnInfoPtr pScrn = xf86Screens[pmap->pScreen->myNum];
+ VisualPtr pVisual = pmap->pVisual;
+ int i;
+ LOCO *colors;
+ int index;
+ Bool newOverscan = FALSE;
+ int overscan, tmpOverscan;
+
+ colors = pColPriv->colors;
+ overscan = pColPriv->overscan;
+
+ /*
+ * Search for a new overscan index in the following cases:
+ *
+ * - The index hasn't yet been initialised.  In this case search
+ * for an index that is black or a close match to black.
+ *
+ * - The colour of the old index is changed. In this case search
+ * all indices for a black or close match to black.
+ *
+ * - The colour of the old index wasn't black. In this case only
+ * search the indices that were changed for a better match to black.
+ */
+
+ switch (pVisual->class) {
+ case StaticGray:
+ case TrueColor:
+ /* Should only come here once. Initialise the overscan index to 0 */
+ overscan = 0;
+ newOverscan = TRUE;
+ break;
+ case StaticColor:
+ /*
+ * Only come here once, but search for the overscan in the same way
+ * as for the other cases.
+ */
+ case DirectColor:
+ case PseudoColor:
+ case GrayScale:
+ if (overscan < 0 || overscan > pScreenPriv->maxColors - 1) {
+ /* Uninitialised */
+ newOverscan = TRUE;
+ } else {
+ /* Check if the overscan was changed */
+ for (i = 0; i < defs; i++) {
+ index = indices[i];
+ if (index == overscan) {
+ newOverscan = TRUE;
+ break;
+ }
+ }
+ }
+ if (newOverscan) {
+ /* The overscan is either uninitialised or it has been changed */
+
+ if (overscan < 0 || overscan > pScreenPriv->maxColors - 1)
+ tmpOverscan = pScreenPriv->maxColors - 1;
+ else
+ tmpOverscan = overscan;
+
+ /* search all entries for a close match to black */
+ for (i = pScreenPriv->maxColors - 1; i >= 0; i--) {
+ if (colors[i].red == 0 && colors[i].green == 0 &&
+ colors[i].blue == 0) {
+ overscan = i;
+#ifdef DEBUGOVERSCAN
+ ErrorF("Black found at index 0x%02x\n", i);
+#endif
+ break;
+ } else {
+#ifdef DEBUGOVERSCAN
+ ErrorF("0x%02x: ", i);
+#endif
+ if (CMapCompareColors(&colors[i], &colors[tmpOverscan])) {
+ tmpOverscan = i;
+#ifdef DEBUGOVERSCAN
+ ErrorF("possible \"Black\" at index 0x%02x\n", i);
+#endif
+ }
+ }
+ }
+ if (i < 0)
+ overscan = tmpOverscan;
+ } else {
+ /* Check of the old overscan wasn't black */
+ if (colors[overscan].red != 0 || colors[overscan].green != 0 ||
+ colors[overscan].blue != 0) {
+ int oldOverscan = tmpOverscan = overscan;
+ /* See of there is now a better match */
+ for (i = 0; i < defs; i++) {
+ index = indices[i];
+ if (colors[index].red == 0 && colors[index].green == 0 &&
+ colors[index].blue == 0) {
+ overscan = index;
+#ifdef DEBUGOVERSCAN
+ ErrorF("Black found at index 0x%02x\n", index);
+#endif
+ break;
+ } else {
+#ifdef DEBUGOVERSCAN
+ ErrorF("0x%02x: ", index);
+#endif
+ if (CMapCompareColors(&colors[index],
+ &colors[tmpOverscan])) {
+ tmpOverscan = index;
+#ifdef DEBUGOVERSCAN
+ ErrorF("possible \"Black\" at index 0x%02x\n",
+ index);
+#endif
+ }
+ }
+ }
+ if (i == defs)
+ overscan = tmpOverscan;
+ if (overscan != oldOverscan)
+ newOverscan = TRUE;
+ }
+ }
+ break;
+ }
+ if (newOverscan) {
+ pColPriv->overscan = overscan;
+ if (LOAD_PALETTE(pmap, pmap->pScreen->myNum)) {
+#ifdef DEBUGOVERSCAN
+ ErrorF("SetOverscan() called from CmapSetOverscan\n");
+#endif
+ pScrn->SetOverscan(pScreenPriv->pScrn, overscan);
+ }
+ }
+}
+
+static void
+CMapUnwrapScreen(ScreenPtr pScreen)
+{
+ CMapScreenPtr pScreenPriv =
+ (CMapScreenPtr) pScreen->devPrivates[CMapScreenIndex].ptr;
+ ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
+
+ pScreen->CloseScreen = pScreenPriv->CloseScreen;
+ pScreen->CreateColormap = pScreenPriv->CreateColormap;
+ pScreen->DestroyColormap = pScreenPriv->DestroyColormap;
+ pScreen->InstallColormap = pScreenPriv->InstallColormap;
+ pScreen->StoreColors = pScreenPriv->StoreColors;
+
+ pScrn->EnterVT = pScreenPriv->EnterVT;
+ pScrn->SwitchMode = pScreenPriv->SwitchMode;
+ pScrn->SetDGAMode = pScreenPriv->SetDGAMode;
+
+ xfree(pScreenPriv->gamma);
+ xfree(pScreenPriv->PreAllocIndices);
+ xfree(pScreenPriv);
+}
+
+
+static void
+ComputeGamma(CMapScreenPtr priv)
+{
+ int elements = priv->gammaElements - 1;
+ double RedGamma, GreenGamma, BlueGamma;
+ int i;
+
+#ifndef DONT_CHECK_GAMMA
+ /* This check is to catch drivers that are not initialising pScrn->gamma */
+ if (priv->pScrn->gamma.red < GAMMA_MIN ||
+ priv->pScrn->gamma.red > GAMMA_MAX ||
+ priv->pScrn->gamma.green < GAMMA_MIN ||
+ priv->pScrn->gamma.green > GAMMA_MAX ||
+ priv->pScrn->gamma.blue < GAMMA_MIN ||
+ priv->pScrn->gamma.blue > GAMMA_MAX) {
+
+ xf86DrvMsgVerb(priv->pScrn->scrnIndex, X_WARNING, 0,
+ "The %s driver didn't call xf86SetGamma() to initialise\n"
+ "\tthe gamma values.\n", priv->pScrn->driverName);
+ xf86DrvMsgVerb(priv->pScrn->scrnIndex, X_WARNING, 0,
+ "PLEASE FIX THE `%s' DRIVER!\n", priv->pScrn->driverName);
+ priv->pScrn->gamma.red = 1.0;
+ priv->pScrn->gamma.green = 1.0;
+ priv->pScrn->gamma.blue = 1.0;
+ }
+#endif
+
+ RedGamma = 1.0 / (double)priv->pScrn->gamma.red;
+ GreenGamma = 1.0 / (double)priv->pScrn->gamma.green;
+ BlueGamma = 1.0 / (double)priv->pScrn->gamma.blue;
+
+ for(i = 0; i <= elements; i++) {
+ if(RedGamma == 1.0)
+ priv->gamma[i].red = i;
+ else
+ priv->gamma[i].red = (CARD16)(pow((double)i/(double)elements,
+ RedGamma) * (double)elements + 0.5);
+
+ if(GreenGamma == 1.0)
+ priv->gamma[i].green = i;
+ else
+ priv->gamma[i].green = (CARD16)(pow((double)i/(double)elements,
+ GreenGamma) * (double)elements + 0.5);
+
+ if(BlueGamma == 1.0)
+ priv->gamma[i].blue = i;
+ else
+ priv->gamma[i].blue = (CARD16)(pow((double)i/(double)elements,
+ BlueGamma) * (double)elements + 0.5);
+ }
+}
+
+
+int
+CMapChangeGamma(
+ int index,
+ Gamma gamma
+){
+ ScrnInfoPtr pScrn = xf86Screens[index];
+ ScreenPtr pScreen = pScrn->pScreen;
+ CMapColormapPtr pColPriv;
+ CMapScreenPtr pScreenPriv;
+ CMapLinkPtr pLink;
+
+ /* Is this sufficient checking ? */
+ if(CMapScreenIndex == -1)
+ return BadImplementation;
+
+ pScreenPriv = (CMapScreenPtr)pScreen->devPrivates[CMapScreenIndex].ptr;
+ if(!pScreenPriv)
+ return BadImplementation;
+
+ if (gamma.red < GAMMA_MIN || gamma.red > GAMMA_MAX ||
+ gamma.green < GAMMA_MIN || gamma.green > GAMMA_MAX ||
+ gamma.blue < GAMMA_MIN || gamma.blue > GAMMA_MAX)
+ return BadValue;
+
+ pScrn->gamma.red = gamma.red;
+ pScrn->gamma.green = gamma.green;
+ pScrn->gamma.blue = gamma.blue;
+
+ ComputeGamma(pScreenPriv);
+
+ /* mark all colormaps on this screen */
+ pLink = pScreenPriv->maps;
+ while(pLink) {
+ pColPriv =
+ (CMapColormapPtr) pLink->cmap->devPrivates[CMapColormapIndex].ptr;
+ pColPriv->recalculate = TRUE;
+ pLink = pLink->next;
+ }
+
+ if(miInstalledMaps[pScreen->myNum] &&
+ ((pScreenPriv->flags & CMAP_LOAD_EVEN_IF_OFFSCREEN) ||
+ pScrn->vtSema || pScreenPriv->isDGAmode)) {
+ ColormapPtr pMap = miInstalledMaps[pScreen->myNum];
+
+ if (!(pScreenPriv->flags & CMAP_PALETTED_TRUECOLOR) &&
+ (pMap->pVisual->class == TrueColor) &&
+ CMapColormapUseMax(pMap->pVisual, pScreenPriv)) {
+
+ /* if the current map doesn't have a palette look
+ for another map to change the gamma on. */
+
+ pLink = pScreenPriv->maps;
+ while(pLink) {
+ if(pLink->cmap->pVisual->class == PseudoColor)
+ break;
+ pLink = pLink->next;
+ }
+
+ if(pLink) {
+ /* need to trick CMapRefreshColors() into thinking
+ this is the currently installed map */
+ miInstalledMaps[pScreen->myNum] = pLink->cmap;
+ CMapReinstallMap(pLink->cmap);
+ miInstalledMaps[pScreen->myNum] = pMap;
+ }
+ } else
+ CMapReinstallMap(pMap);
+ }
+
+ return Success;
+}
+
+
+static void
+ComputeGammaRamp (
+ CMapScreenPtr priv,
+ unsigned short *red,
+ unsigned short *green,
+ unsigned short *blue
+){
+ int elements = priv->gammaElements;
+ LOCO *entry = priv->gamma;
+ int shift = 16 - priv->sigRGBbits;
+
+ while(elements--) {
+ entry->red = *(red++) >> shift;
+ entry->green = *(green++) >> shift;
+ entry->blue = *(blue++) >> shift;
+ entry++;
+ }
+}
+
+int
+xf86ChangeGammaRamp(
+ ScreenPtr pScreen,
+ int size,
+ unsigned short *red,
+ unsigned short *green,
+ unsigned short *blue
+){
+ ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
+ CMapColormapPtr pColPriv;
+ CMapScreenPtr pScreenPriv;
+ CMapLinkPtr pLink;
+
+ if(CMapScreenIndex == -1)
+ return BadImplementation;
+
+ pScreenPriv = (CMapScreenPtr)pScreen->devPrivates[CMapScreenIndex].ptr;
+ if(!pScreenPriv)
+ return BadImplementation;
+
+ if(pScreenPriv->gammaElements != size)
+ return BadValue;
+
+ ComputeGammaRamp(pScreenPriv, red, green, blue);
+
+ /* mark all colormaps on this screen */
+ pLink = pScreenPriv->maps;
+ while(pLink) {
+ pColPriv =
+ (CMapColormapPtr) pLink->cmap->devPrivates[CMapColormapIndex].ptr;
+ pColPriv->recalculate = TRUE;
+ pLink = pLink->next;
+ }
+
+ if(miInstalledMaps[pScreen->myNum] &&
+ ((pScreenPriv->flags & CMAP_LOAD_EVEN_IF_OFFSCREEN) ||
+ pScrn->vtSema || pScreenPriv->isDGAmode)) {
+ ColormapPtr pMap = miInstalledMaps[pScreen->myNum];
+
+ if (!(pScreenPriv->flags & CMAP_PALETTED_TRUECOLOR) &&
+ (pMap->pVisual->class == TrueColor) &&
+ CMapColormapUseMax(pMap->pVisual, pScreenPriv)) {
+
+ /* if the current map doesn't have a palette look
+ for another map to change the gamma on. */
+
+ pLink = pScreenPriv->maps;
+ while(pLink) {
+ if(pLink->cmap->pVisual->class == PseudoColor)
+ break;
+ pLink = pLink->next;
+ }
+
+ if(pLink) {
+ /* need to trick CMapRefreshColors() into thinking
+ this is the currently installed map */
+ miInstalledMaps[pScreen->myNum] = pLink->cmap;
+ CMapReinstallMap(pLink->cmap);
+ miInstalledMaps[pScreen->myNum] = pMap;
+ }
+ } else
+ CMapReinstallMap(pMap);
+ }
+
+ return Success;
+}
+
+int
+xf86GetGammaRampSize(ScreenPtr pScreen)
+{
+ CMapScreenPtr pScreenPriv;
+
+ if(CMapScreenIndex == -1) return 0;
+
+ pScreenPriv = (CMapScreenPtr)pScreen->devPrivates[CMapScreenIndex].ptr;
+ if(!pScreenPriv) return 0;
+
+ return pScreenPriv->gammaElements;
+}
+
+int
+xf86GetGammaRamp(
+ ScreenPtr pScreen,
+ int size,
+ unsigned short *red,
+ unsigned short *green,
+ unsigned short *blue
+){
+ CMapScreenPtr pScreenPriv;
+ LOCO *entry;
+ int shift, sigbits;
+
+ if(CMapScreenIndex == -1)
+ return BadImplementation;
+
+ pScreenPriv = (CMapScreenPtr)pScreen->devPrivates[CMapScreenIndex].ptr;
+ if(!pScreenPriv)
+ return BadImplementation;
+
+ if(size > pScreenPriv->gammaElements)
+ return BadValue;
+
+ entry = pScreenPriv->gamma;
+ sigbits = pScreenPriv->sigRGBbits;
+
+ while(size--) {
+ *red = entry->red << (16 - sigbits);
+ *green = entry->green << (16 - sigbits);
+ *blue = entry->blue << (16 - sigbits);
+ shift = sigbits;
+ while(shift < 16) {
+ *red |= *red >> shift;
+ *green |= *green >> shift;
+ *blue |= *blue >> shift;
+ shift += sigbits;
+ }
+ red++; green++; blue++;
+ entry++;
+ }
+
+ return Success;
+}
+
+int
+xf86ChangeGamma(
+ ScreenPtr pScreen,
+ Gamma gamma
+){
+ ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
+
+ if(pScrn->ChangeGamma)
+ return (*pScrn->ChangeGamma)(pScreen->myNum, gamma);
+
+ return Success; /* Success? */
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-28 05:31:53 +0000