/*
 * $Id$
 *
 * Copyright © 1999 Keith Packard
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation, and that the name of Keith Packard not be used in
 * advertising or publicity pertaining to distribution of the software without
 * specific, written prior permission.  Keith Packard makes no
 * representations about the suitability of this software for any purpose.  It
 * is provided "as is" without express or implied warranty.
 *
 * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL KEITH PACKARD BE LIABLE 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.
 */
/* $XFree86: $ */

#include "kdrive.h"

/*
 * Put the entire colormap into the DAC
 */

void
KdSetColormap (ScreenPtr pScreen)
{
    KdScreenPriv(pScreen);
    ColormapPtr	pCmap = pScreenPriv->pInstalledmap;
    Pixel	pixels[KD_MAX_PSEUDO_SIZE];
    xrgb	colors[KD_MAX_PSEUDO_SIZE];
    xColorItem	defs[KD_MAX_PSEUDO_SIZE];
    int		i;

    if (!pScreenPriv->card->cfuncs->putColors)
	return;
    if (pScreenPriv->screen->depth > KD_MAX_PSEUDO_DEPTH)
	return;
    
    if (!pScreenPriv->enabled)
	return;
    
    if (!pCmap)
	return;

    /*
     * Make DIX convert pixels into RGB values -- this handles
     * true/direct as well as pseudo/static visuals
     */
    
    for (i = 0; i < (1 << pScreenPriv->screen->depth); i++)
	pixels[i] = i;

    QueryColors (pCmap, (1 << pScreenPriv->screen->depth), pixels, colors);
    
    for (i = 0; i < (1 << pScreenPriv->screen->depth); i++)
    {
	defs[i].pixel = i;
	defs[i].red = colors[i].red;
	defs[i].green = colors[i].green;
	defs[i].blue = colors[i].blue;
	defs[i].flags = DoRed|DoGreen|DoBlue;
    }

    (*pScreenPriv->card->cfuncs->putColors) (pCmap->pScreen, 
					   (1 << pScreenPriv->screen->depth),
					   defs);

    /* recolor hardware cursor */
    if (pScreenPriv->card->cfuncs->recolorCursor)
	(*pScreenPriv->card->cfuncs->recolorCursor) (pCmap->pScreen, 0, 0);
}

/*
 * When the hardware is enabled, save the hardware colors and store
 * the current colormap
 */
void
KdEnableColormap (ScreenPtr pScreen)
{
    KdScreenPriv(pScreen);
    int	    i;

    if (!pScreenPriv->card->cfuncs->putColors)
	return;
    if (pScreenPriv->screen->depth <= KD_MAX_PSEUDO_DEPTH)
    {
	for (i = 0; i < (1 << pScreenPriv->screen->depth); i++)
	    pScreenPriv->systemPalette[i].pixel = i;
	(*pScreenPriv->card->cfuncs->getColors) (pScreen,
					       (1 << pScreenPriv->screen->depth),
					       pScreenPriv->systemPalette);
    }
    KdSetColormap (pScreen);
}

void
KdDisableColormap (ScreenPtr pScreen)
{
    KdScreenPriv(pScreen);

    if (!pScreenPriv->card->cfuncs->putColors)
	return;
    if (pScreenPriv->screen->depth > KD_MAX_PSEUDO_DEPTH)
	return;
    
    (*pScreenPriv->card->cfuncs->putColors) (pScreen,
					   (1 << pScreenPriv->screen->depth),
					   pScreenPriv->systemPalette);
}

/*
 * KdInstallColormap
 *
 * This function is called when the server receives a request to install a
 * colormap or when the server needs to install one on its own, like when
 * there's no window manager running and the user has moved the pointer over
 * an X client window.  It needs to build an identity Windows palette for the
 * colormap and realize it into the Windows system palette.
 */
void
KdInstallColormap (ColormapPtr pCmap)
{
    KdScreenPriv(pCmap->pScreen);

    if (pCmap == pScreenPriv->pInstalledmap)
	return;

    /* Tell X clients that the installed colormap is going away. */
    if (pScreenPriv->pInstalledmap)
	WalkTree(pScreenPriv->pInstalledmap->pScreen, TellLostMap,
		 (pointer) &(pScreenPriv->pInstalledmap->mid));

    /* Take note of the new installed colorscreen-> */
    pScreenPriv->pInstalledmap = pCmap;

    KdSetColormap (pCmap->pScreen);
    
    /* Tell X clients of the new colorscreen-> */
    WalkTree(pCmap->pScreen, TellGainedMap, (pointer) &(pCmap->mid));
}

/*
 * KdUninstallColormap
 *
 * This function uninstalls a colormap by installing the default X colorscreen->
 * The default X colormap itself cannot be uninstalled.
 */
void
KdUninstallColormap (ColormapPtr pCmap)
{
    KdScreenPriv(pCmap->pScreen);

    if (pCmap == pScreenPriv->pInstalledmap) 
    {
	Colormap defMapID = pCmap->pScreen->defColormap;

	if ((Colormap) pCmap->mid != defMapID) 
	{
	    ColormapPtr defMap = (ColormapPtr) LookupIDByType(defMapID,
							      RT_COLORMAP);
	    if (defMap)
		(*pCmap->pScreen->InstallColormap)(defMap);
	}
    }
}

int
KdListInstalledColormaps (ScreenPtr pScreen, Colormap *pCmaps)
{
    KdScreenPriv(pScreen);
    
    if (pScreenPriv->pInstalledmap)
    {
	*pCmaps = pScreenPriv->pInstalledmap->mid;
	return 1;
    }
    return 0;
}

/*
 * KdStoreColors
 *
 * This function is called whenever the server receives a request to store
 * color values into one or more entries in the currently installed X
 * colormap; it can be either the default colormap or a private colorscreen->
 */
void
KdStoreColors (ColormapPtr pCmap, int ndef, xColorItem *pdefs)
{
    KdScreenPriv(pCmap->pScreen);
    VisualPtr           pVisual;
    xColorItem          expanddefs[KD_MAX_PSEUDO_SIZE];

    if (pCmap != pScreenPriv->pInstalledmap)
	return;
    
    if (!pScreenPriv->card->cfuncs->putColors)
	return;
    
    if (pScreenPriv->screen->depth > KD_MAX_PSEUDO_DEPTH)
	return;
    
    if (!pScreenPriv->enabled)
	return;
    
    /* Check for DirectColor or TrueColor being simulated on a PseudoColor device. */
    pVisual = pCmap->pVisual;
    if ((pVisual->class | DynamicClass) == DirectColor)
    {
	/*
	 * Expand DirectColor or TrueColor color values into a PseudoColor
	 * format.  Defer to the Color Framebuffer (CFB) code to do that.
	 */
	ndef = fbExpandDirectColors(pCmap, ndef, pdefs, expanddefs);
	pdefs = expanddefs;
    }

    (*pScreenPriv->card->cfuncs->putColors) (pCmap->pScreen, ndef, pdefs);
    
    /* recolor hardware cursor */
    if (pScreenPriv->card->cfuncs->recolorCursor)
	(*pScreenPriv->card->cfuncs->recolorCursor) (pCmap->pScreen, ndef, pdefs);
}