TinyX/kdrive/src/kcmap.c

/*
 *
 * 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.
 */

#ifdef HAVE_CONFIG_H
#include <kdrive-config.h>
#endif
#include "kdrive.h"

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

static 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->fb.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->fb.depth); i++)
		pixels[i] = i;

	QueryColors(pCmap, (1 << pScreenPriv->screen->fb.depth), pixels,
		    colors);

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

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

	if (!pScreenPriv->card->cfuncs->putColors)
		return;
	if (pScreenPriv->screen->fb.depth <= KD_MAX_PSEUDO_DEPTH) {
		(*pScreenPriv->card->cfuncs->putColors) (pScreen,
							 (1 << pScreenPriv->
							  screen->fb.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 colormap */
	WalkTree(pCmap->pScreen, TellGainedMap, (pointer) & (pCmap->mid));
}

/*
 * KdUninstallColormap
 *
 * This function uninstalls a colormap by either installing
 * the default X colormap or erasing the installed colormap pointer.
 * The default X colormap itself cannot be uninstalled.
 */
void KdUninstallColormap(ColormapPtr pCmap)
{
	KdScreenPriv(pCmap->pScreen);
	Colormap defMapID;
	ColormapPtr defMap;

	/* ignore if not installed */
	if (pCmap != pScreenPriv->pInstalledmap)
		return;

	/* ignore attempts to uninstall default colormap */
	defMapID = pCmap->pScreen->defColormap;
	if ((Colormap) pCmap->mid == defMapID)
		return;

	/* install default */
	defMap = (ColormapPtr) LookupIDByType(defMapID, RT_COLORMAP);
	if (defMap)
		(*pCmap->pScreen->InstallColormap) (defMap);
	else {
		/* uninstall and clear colormap pointer */
		WalkTree(pCmap->pScreen, TellLostMap, (pointer) & (pCmap->mid));
		pScreenPriv->pInstalledmap = 0;
	}
}

int KdListInstalledColormaps(ScreenPtr pScreen, Colormap * pCmaps)
{
	KdScreenPriv(pScreen);
	int n = 0;

	if (pScreenPriv->pInstalledmap) {
		*pCmaps++ = pScreenPriv->pInstalledmap->mid;
		n++;
	}
	return n;
}

/*
 * 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->fb.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);
}