xref: /xsrc/external/mit/xorg-server/dist/hw/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_DIX_CONFIG_H
#include <dix-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,
                serverClient);

    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);
}

/*
 * 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,
                 (void *) &(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, (void *) &(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 */
    dixLookupResourceByType((void **) &defMap, defMapID, RT_COLORMAP,
                            serverClient, DixInstallAccess);
    if (defMap)
        (*pCmap->pScreen->InstallColormap) (defMap);
    else {
        /* uninstall and clear colormap pointer */
        WalkTree(pCmap->pScreen, TellLostMap, (void *) &(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);
}