colormap.c

远程桌面连接工具

	xE.u.u.type = ColormapNotify;
	xE.u.colormap.window = pwin->drawable.id;
	xE.u.colormap.colormap = None;
	xE.u.colormap.new = TRUE;
	xE.u.colormap.state = ColormapUninstalled;
	DeliverEvents(pwin, &xE, 1, (WindowPtr)NULL);
	if (pwin->optional) {
	    pwin->optional->colormap = None;
	    CheckWindowOptionalNeed (pwin);
	}
    }

    return (WT_WALKCHILDREN);
}

/* Tell window that pmid got uninstalled */
int
TellLostMap (pwin, value)
    WindowPtr	pwin;
    pointer	value;
{
    Colormap 	*pmid = (Colormap *)value;
    xEvent 	xE;
    if (wColormap(pwin) == *pmid)
    {
	/* This should be call to DeliverEvent */
	xE.u.u.type = ColormapNotify;
	xE.u.colormap.window = pwin->drawable.id;
	xE.u.colormap.colormap = *pmid;
	xE.u.colormap.new = FALSE;
	xE.u.colormap.state = ColormapUninstalled;
	DeliverEvents(pwin, &xE, 1, (WindowPtr)NULL);
    }

    return (WT_WALKCHILDREN);
}

/* Tell window that pmid got installed */
int
TellGainedMap (pwin, value)
    WindowPtr	pwin;
    pointer	value;
{
    Colormap 	*pmid = (Colormap *)value;
    xEvent 	xE;
    if (wColormap (pwin) == *pmid)
    {
	/* This should be call to DeliverEvent */
	xE.u.u.type = ColormapNotify;
	xE.u.colormap.window = pwin->drawable.id;
	xE.u.colormap.colormap = *pmid;
	xE.u.colormap.new = FALSE;
	xE.u.colormap.state = ColormapInstalled;
	DeliverEvents(pwin, &xE, 1, (WindowPtr)NULL);
    }

    return (WT_WALKCHILDREN);
}

  
int
CopyColormapAndFree (mid, pSrc, client)
    Colormap	mid;
    ColormapPtr	pSrc;
    int		client;
{
    ColormapPtr	pmap = (ColormapPtr) NULL;
    int		result, alloc, size;
    Colormap	midSrc;
    ScreenPtr	pScreen;
    VisualPtr	pVisual;

    pScreen = pSrc->pScreen;
    pVisual = pSrc->pVisual;
    midSrc = pSrc->mid;
    alloc = ((pSrc->flags & AllAllocated) && CLIENT_ID(midSrc) == client) ?
            AllocAll : AllocNone;
    size = pVisual->ColormapEntries;

    /* If the create returns non-0, it failed */
    result = CreateColormap (mid, pScreen, pVisual, &pmap, alloc, client);
    if(result != Success)
        return(result);
    if(alloc == AllocAll)
    {
	memmove((char *)pmap->red, (char *)pSrc->red, size * sizeof(Entry));
	if((pmap->class | DynamicClass) == DirectColor)
	{
	    memmove((char *)pmap->green, (char *)pSrc->green, size * sizeof(Entry));
	    memmove((char *)pmap->blue, (char *)pSrc->blue, size * sizeof(Entry));
	}
	pSrc->flags &= ~AllAllocated;
	FreePixels(pSrc, client);
	UpdateColors(pmap);
	return(Success);
    }

    CopyFree(REDMAP, client, pSrc, pmap);
    if ((pmap->class | DynamicClass) == DirectColor)
    {
	CopyFree(GREENMAP, client, pSrc, pmap);
	CopyFree(BLUEMAP, client, pSrc, pmap);
    }
    if (pmap->class & DynamicClass)
	UpdateColors(pmap);
    /* XXX should worry about removing any RT_CMAPENTRY resource */
    return(Success);
}

/* Helper routine for freeing large numbers of cells from a map */
static void
CopyFree (channel, client, pmapSrc, pmapDst)
    int		channel, client;
    ColormapPtr	pmapSrc, pmapDst;
{
    int		z, npix, oldFree;
    EntryPtr	pentSrcFirst, pentDstFirst;
    EntryPtr	pentSrc, pentDst;
    Pixel	*ppix;
    int		nalloc;

    switch(channel)
    {
      default:	/* so compiler can see that everything gets initialized */
      case REDMAP:
	ppix = (pmapSrc->clientPixelsRed)[client];
	npix = (pmapSrc->numPixelsRed)[client];
	pentSrcFirst = pmapSrc->red;
	pentDstFirst = pmapDst->red;
	oldFree = pmapSrc->freeRed;
	break;
      case GREENMAP:
	ppix = (pmapSrc->clientPixelsGreen)[client];
	npix = (pmapSrc->numPixelsGreen)[client];
	pentSrcFirst = pmapSrc->green;
	pentDstFirst = pmapDst->green;
	oldFree = pmapSrc->freeGreen;
	break;
      case BLUEMAP:
	ppix = (pmapSrc->clientPixelsBlue)[client];
	npix = (pmapSrc->numPixelsBlue)[client];
	pentSrcFirst = pmapSrc->blue;
	pentDstFirst = pmapDst->blue;
	oldFree = pmapSrc->freeBlue;
	break;
    }
    nalloc = 0;
    if (pmapSrc->class & DynamicClass)
    {
	for(z = npix; --z >= 0; ppix++)
	{
	    /* Copy entries */
	    pentSrc = pentSrcFirst + *ppix;
	    pentDst = pentDstFirst + *ppix;
	    if (pentDst->refcnt > 0)
	    {
		pentDst->refcnt++;
	    }
	    else
	    {
		*pentDst = *pentSrc;
		nalloc++;
		if (pentSrc->refcnt > 0)
		    pentDst->refcnt = 1;
		else
		    pentSrc->fShared = FALSE;
	    }
	    FreeCell(pmapSrc, *ppix, channel);
	}
    }

    /* Note that FreeCell has already fixed pmapSrc->free{Color} */
    switch(channel)
    {
      case REDMAP:
        pmapDst->freeRed -= nalloc;
        (pmapDst->clientPixelsRed)[client] =
	    (pmapSrc->clientPixelsRed)[client];
        (pmapSrc->clientPixelsRed)[client] = (Pixel *) NULL;
        (pmapDst->numPixelsRed)[client] = (pmapSrc->numPixelsRed)[client];
        (pmapSrc->numPixelsRed)[client] = 0;
	break;
      case GREENMAP:
        pmapDst->freeGreen -= nalloc;
        (pmapDst->clientPixelsGreen)[client] =
	    (pmapSrc->clientPixelsGreen)[client];
        (pmapSrc->clientPixelsGreen)[client] = (Pixel *) NULL;
        (pmapDst->numPixelsGreen)[client] = (pmapSrc->numPixelsGreen)[client];
        (pmapSrc->numPixelsGreen)[client] = 0;
	break;
      case BLUEMAP:
        pmapDst->freeBlue -= nalloc;
        pmapDst->clientPixelsBlue[client] = pmapSrc->clientPixelsBlue[client];
        pmapSrc->clientPixelsBlue[client] = (Pixel *) NULL;
        pmapDst->numPixelsBlue[client] = pmapSrc->numPixelsBlue[client];
        pmapSrc->numPixelsBlue[client] = 0;
	break;
    }
}

/* Free the ith entry in a color map.  Must handle freeing of
 * colors allocated through AllocColorPlanes */
static void
FreeCell (pmap, i, channel)
    ColormapPtr pmap;
    Pixel i;
    int	channel;
{
    EntryPtr pent;
    int	*pCount;


    switch (channel)
    {
      default:	/* so compiler can see that everything gets initialized */
      case PSEUDOMAP:
      case REDMAP:
          pent = (EntryPtr) &pmap->red[i];
	  pCount = &pmap->freeRed;
	  break;
      case GREENMAP:
          pent = (EntryPtr) &pmap->green[i];
	  pCount = &pmap->freeGreen;
	  break;
      case BLUEMAP:
          pent = (EntryPtr) &pmap->blue[i];
	  pCount = &pmap->freeBlue;
	  break;
    }
    /* If it's not privately allocated and it's not time to free it, just
     * decrement the count */
    if (pent->refcnt > 1)
	pent->refcnt--;
    else
    {
        /* If the color type is shared, find the sharedcolor. If decremented
         * refcnt is 0, free the shared cell. */
        if (pent->fShared)
	{
	    if(--pent->co.shco.red->refcnt == 0)
		xfree(pent->co.shco.red);
	    if(--pent->co.shco.green->refcnt == 0)
		xfree(pent->co.shco.green);
	    if(--pent->co.shco.blue->refcnt == 0)
		xfree(pent->co.shco.blue);
	    pent->fShared = FALSE;
	}
	pent->refcnt = 0;
	*pCount += 1;
    }
}

static void
UpdateColors (pmap)
    ColormapPtr	pmap;
{
    xColorItem		*defs;
    register xColorItem *pdef;
    register EntryPtr 	pent;
    register VisualPtr	pVisual;
    int			i, n, size;

    pVisual = pmap->pVisual;
    size = pVisual->ColormapEntries;
    defs = (xColorItem *)ALLOCATE_LOCAL(size * sizeof(xColorItem));
    if (!defs)
	return;
    n = 0;
    pdef = defs;
    if (pmap->class == DirectColor)
    {
        for (i = 0; i < size; i++)
	{
	    if (!pmap->red[i].refcnt &&
		!pmap->green[i].refcnt &&
		!pmap->blue[i].refcnt)
		continue;
	    pdef->pixel = ((Pixel)i << pVisual->offsetRed) |
			  ((Pixel)i << pVisual->offsetGreen) |
			  ((Pixel)i << pVisual->offsetBlue);
	    pdef->red = pmap->red[i].co.local.red;
	    pdef->green = pmap->green[i].co.local.green;
	    pdef->blue = pmap->blue[i].co.local.blue;
	    pdef->flags = DoRed|DoGreen|DoBlue;
	    pdef++;
	    n++;
	}
    }
    else
    {
        for (i = 0, pent = pmap->red; i < size; i++, pent++)
	{
	    if (!pent->refcnt)
		continue;
	    pdef->pixel = i;
	    if(pent->fShared)
	    {
		pdef->red = pent->co.shco.red->color;
		pdef->green = pent->co.shco.green->color;
		pdef->blue = pent->co.shco.blue->color;
	    }
	    else
	    {
		pdef->red = pent->co.local.red;
		pdef->green = pent->co.local.green;
		pdef->blue = pent->co.local.blue;
	    }
	    pdef->flags = DoRed|DoGreen|DoBlue;
	    pdef++;
	    n++;
	}
    }
    if (n)
	(*pmap->pScreen->StoreColors)(pmap, n, defs);
    DEALLOCATE_LOCAL(defs);
}

/* Get a read-only color from a ColorMap (probably slow for large maps)
 * Returns by changing the value in pred, pgreen, pblue and pPix
 */
int
AllocColor (pmap, pred, pgreen, pblue, pPix, client)
    ColormapPtr		pmap;
    unsigned short 	*pred, *pgreen, *pblue;
    Pixel		*pPix;
    int			client;
{
    Pixel	pixR, pixG, pixB;
    int		entries;
    xrgb	rgb;
    int		class;
    VisualPtr	pVisual;
    int		npix;
    Pixel	*ppix;

    pVisual = pmap->pVisual;
    (*pmap->pScreen->ResolveColor) (pred, pgreen, pblue, pVisual);
    rgb.red = *pred;
    rgb.green = *pgreen;
    rgb.blue = *pblue;
    class = pmap->class;
    entries = pVisual->ColormapEntries;

    /* If the colormap is being created, then we want to be able to change
     * the colormap, even if it's a static type. Otherwise, we'd never be
     * able to initialize static colormaps
     */
    if(pmap->flags & BeingCreated)
	class |= DynamicClass;

    /* If this is one of the static storage classes, and we're not initializing
     * it, the best we can do is to find the closest color entry to the
     * requested one and return that.
     */
    switch (class) {
    case StaticColor:
    case StaticGray:
	/* Look up all three components in the same pmap */
	*pPix = pixR = FindBestPixel(pmap->red, entries, &rgb, PSEUDOMAP);
	*pred = pmap->red[pixR].co.local.red;
	*pgreen = pmap->red[pixR].co.local.green;
	*pblue = pmap->red[pixR].co.local.blue;
	npix = pmap->numPixelsRed[client];
	ppix = (Pixel *) xrealloc(pmap->clientPixelsRed[client],
				  (npix + 1) * sizeof(Pixel));
	if (!ppix)
	    return (BadAlloc);
	ppix[npix] = pixR;
	pmap->clientPixelsRed[client] = ppix;
	pmap->numPixelsRed[client]++;
	break;

    case TrueColor:
	/* Look up each component in its own map, then OR them together */
	pixR = FindBestPixel(pmap->red, NUMRED(pVisual), &rgb, REDMAP);
	pixG = FindBestPixel(pmap->green, NUMGREEN(pVisual), &rgb, GREENMAP);
	pixB = FindBestPixel(pmap->blue, NUMBLUE(pVisual), &rgb, BLUEMAP);
	*pPix = (pixR << pVisual->offsetRed) |
		(pixG << pVisual->offsetGreen) |
		(pixB << pVisual->offsetBlue);
	*pred = pmap->red[pixR].co.local.red;
	*pgreen = pmap->green[pixG].co.local.green;
	*pblue = pmap->blue[pixB].co.local.blue;
	npix = pmap->numPixelsRed[client];
	ppix = (Pixel *) xrealloc(pmap->clientPixelsRed[client],
				  (npix + 1) * sizeof(Pixel));
	if (!ppix)
	    return (BadAlloc);
	ppix[npix] = pixR;
	pmap->clientPixelsRed[client] = ppix;
	npix = pmap->numPixelsGreen[client];
	ppix = (Pixel *) xrealloc(pmap->clientPixelsGreen[client],
				  (npix + 1) * sizeof(Pixel));
	if (!ppix)
	    return (BadAlloc);
	ppix[npix] = pixG;
	pmap->clientPixelsGreen[client] = ppix;
	npix = pmap->numPixelsBlue[client];
	ppix = (Pixel *) xrealloc(pmap->clientPixelsBlue[client],
				  (npix + 1) * sizeof(Pixel));
	if (!ppix)
	    return (BadAlloc);
	ppix[npix] = pixB;
	pmap->clientPixelsBlue[client] = ppix;
	pmap->numPixelsRed[client]++;
	pmap->numPixelsGreen[client]++;
	pmap->numPixelsBlue[client]++;
	break;

    case GrayScale:
    case PseudoColor:
	if (FindColor(pmap, pmap->red, entries, &rgb, pPix, PSEUDOMAP,
		      client, AllComp) != Success)
	    return (BadAlloc);
        break;

    case DirectColor:
	pixR = (*pPix & pVisual->redMask) >> pVisual->offsetRed; 
	if (FindColor(pmap, pmap->red, NUMRED(pVisual), &rgb, &pixR, REDMAP,
		      client, RedComp) != Success)
	    return (BadAlloc);
	pixG = (*pPix & pVisual->greenMask) >> pVisual->offsetGreen; 
	if (FindColor(pmap, pmap->green, NUMGREEN(pVisual), &rgb, &pixG,
		      GREENMAP, client, GreenComp) != Success)
	{
	    (void)FreeCo(pmap, client, REDMAP, 1, &pixR, (Pixel)0);
	    return (BadAlloc);
	}
	pixB = (*pPix & pVisual->blueMask) >> pVisual->offsetBlue; 
	if (FindColor(pmap, pmap->blue, NUMBLUE(pVisual), &rgb, &pixB, BLUEMAP,
		      client, BlueComp) != Success)
	{
	    (void)FreeCo(pmap, client, GREENMAP, 1, &pixG, (Pixel)0);
	    (void)FreeCo(pmap, client, REDMAP, 1, &pixR, (Pixel)0);
	    return (BadAlloc);
	}
	*pPix = pixR | pixG | pixB;
	break;
    }

    /* if this is the client's first pixel in this colormap, tell the
     * resource manager that the client has pixels in this colormap which
     * should be freed when the client dies */
    if ((pmap->numPixelsRed[client] == 1) &&
	(CLIENT_ID(pmap->mid) != client) &&
	!(pmap->flags & BeingCreated))
    {
	colorResource	*pcr;

	pcr = (colorResource *) xalloc(sizeof(colorResource));
	if (!pcr)
	{
	    (void)FreeColors(pmap, client, 1, pPix, (Pixel)0);
	    return (BadAlloc);
	}
	pcr->mid = pmap->mid;
	pcr->client = client;
	if (!AddResource(FakeClientID(client), RT_CMAPENTRY, (pointer)pcr))
	    return (BadAlloc);
    }
    return (Success);
}

/*
 * FakeAllocColor -- fake an AllocColor request by
 * returning a free pixel if availible, otherwise returning
 * the closest matching pixel.  This is used by the mi
 * software sprite code to recolor cursors.  A nice side-effect
 * is that this routine will never return failure.
 */

void
FakeAllocColor (pmap, item)
    register ColormapPtr pmap;
    register xColorItem  *item;
{
    Pixel	pixR, pixG, pixB;
    Pixel	temp;
    int		entries;
    xrgb	rgb;
    int		class;
    register VisualPtr	pVisual;

    pVisual = pmap->pVisual;
    rgb.red = item->red;
    rgb.green = item->green;
    rgb.blue = item->blue;
    (*pmap->pScreen->ResolveColor) (&rgb.red, &rgb.green, &rgb.blue, pVisual);
    class = pmap->class;
    entries = pVisual->ColormapEntries;

    switch (class) {
    case GrayScale:
    case PseudoColor: