xf86modes.c

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			    int flags)
{
    DisplayModePtr mode;

    for (mode = modeList; mode != NULL; mode = mode->next) {
	if (mode->Flags & V_INTERLACE && !(flags & V_INTERLACE))
	    mode->status = MODE_NO_INTERLACE;
	if (mode->Flags & V_DBLSCAN && !(flags & V_DBLSCAN))
	    mode->status = MODE_NO_DBLESCAN;
    }
}

/**
 * Marks as bad any modes extending beyond the given max X, Y, or pitch.
 *
 * \param modeList doubly-linked or circular list of modes.
 *
 * This is not in xf86Modes.c, but would be part of the proposed new API.
 */
_X_EXPORT void
xf86ValidateModesSize(ScrnInfoPtr pScrn, DisplayModePtr modeList,
			  int maxX, int maxY, int maxPitch)
{
    DisplayModePtr mode;

    for (mode = modeList; mode != NULL; mode = mode->next) {
	if (maxPitch > 0 && mode->HDisplay > maxPitch)
	    mode->status = MODE_BAD_WIDTH;

	if (maxX > 0 && mode->HDisplay > maxX)
	    mode->status = MODE_VIRTUAL_X;

	if (maxY > 0 && mode->VDisplay > maxY)
	    mode->status = MODE_VIRTUAL_Y;

	if (mode->next == modeList)
	    break;
    }
}

/**
 * Marks as bad any modes that aren't supported by the given monitor's
 * hsync and vrefresh ranges.
 *
 * \param modeList doubly-linked or circular list of modes.
 *
 * This is not in xf86Modes.c, but would be part of the proposed new API.
 */
_X_EXPORT void
xf86ValidateModesSync(ScrnInfoPtr pScrn, DisplayModePtr modeList,
			  MonPtr mon)
{
    DisplayModePtr mode;

    for (mode = modeList; mode != NULL; mode = mode->next) {
	Bool bad;
	int i;

	bad = TRUE;
	for (i = 0; i < mon->nHsync; i++) {
	    if (xf86ModeHSync(mode) >= mon->hsync[i].lo &&
		xf86ModeHSync(mode) <= mon->hsync[i].hi)
	    {
		bad = FALSE;
	    }
	}
	if (bad)
	    mode->status = MODE_HSYNC;

	bad = TRUE;
	for (i = 0; i < mon->nVrefresh; i++) {
	    if (xf86ModeVRefresh(mode) >= mon->vrefresh[i].lo &&
		xf86ModeVRefresh(mode) <= mon->vrefresh[i].hi)
	    {
		bad = FALSE;
	    }
	}
	if (bad)
	    mode->status = MODE_VSYNC;

	if (mode->next == modeList)
	    break;
    }
}

/**
 * Marks as bad any modes extending beyond outside of the given clock ranges.
 *
 * \param modeList doubly-linked or circular list of modes.
 * \param min pointer to minimums of clock ranges
 * \param max pointer to maximums of clock ranges
 * \param n_ranges number of ranges.
 *
 * This is not in xf86Modes.c, but would be part of the proposed new API.
 */
_X_EXPORT void
xf86ValidateModesClocks(ScrnInfoPtr pScrn, DisplayModePtr modeList,
			    int *min, int *max, int n_ranges)
{
    DisplayModePtr mode;
    int i;

    for (mode = modeList; mode != NULL; mode = mode->next) {
	Bool good = FALSE;
	for (i = 0; i < n_ranges; i++) {
	    if (mode->Clock >= min[i] && mode->Clock <= max[i]) {
		good = TRUE;
		break;
	    }
	}
	if (!good)
	    mode->status = MODE_CLOCK_RANGE;
    }
}

/**
 * If the user has specified a set of mode names to use, mark as bad any modes
 * not listed.
 *
 * The user mode names specified are prefixes to names of modes, so "1024x768"
 * will match modes named "1024x768", "1024x768x75", "1024x768-good", but
 * "1024x768x75" would only match "1024x768x75" from that list.
 *
 * MODE_BAD is used as the rejection flag, for lack of a better flag.
 *
 * \param modeList doubly-linked or circular list of modes.
 *
 * This is not in xf86Modes.c, but would be part of the proposed new API.
 */
_X_EXPORT void
xf86ValidateModesUserConfig(ScrnInfoPtr pScrn, DisplayModePtr modeList)
{
    DisplayModePtr mode;

    if (pScrn->display->modes[0] == NULL)
	return;

    for (mode = modeList; mode != NULL; mode = mode->next) {
	int i;
	Bool good = FALSE;

	for (i = 0; pScrn->display->modes[i] != NULL; i++) {
	    if (strncmp(pScrn->display->modes[i], mode->name,
			strlen(pScrn->display->modes[i])) == 0) {
		good = TRUE;
		break;
	    }
	}
	if (!good)
	    mode->status = MODE_BAD;
    }
}


/**
 * Frees any modes from the list with a status other than MODE_OK.
 *
 * \param modeList pointer to a doubly-linked or circular list of modes.
 * \param verbose determines whether the reason for mode invalidation is
 *	  printed.
 *
 * This is not in xf86Modes.c, but would be part of the proposed new API.
 */
_X_EXPORT void
xf86PruneInvalidModes(ScrnInfoPtr pScrn, DisplayModePtr *modeList,
			  Bool verbose)
{
    DisplayModePtr mode;

    for (mode = *modeList; mode != NULL;) {
	DisplayModePtr next = mode->next, first = *modeList;

	if (mode->status != MODE_OK) {
	    if (verbose) {
		char *type = "";
		if (mode->type & M_T_BUILTIN)
		    type = "built-in ";
		else if (mode->type & M_T_DEFAULT)
		    type = "default ";
		xf86DrvMsg(pScrn->scrnIndex, X_INFO,
			   "Not using %smode \"%s\" (%s)\n", type, mode->name,
			   xf86ModeStatusToString(mode->status));
	    }
	    xf86DeleteMode(modeList, mode);
	}

	if (next == first)
	    break;
	mode = next;
    }
}

/**
 * Adds the new mode into the mode list, and returns the new list
 *
 * \param modes doubly-linked mode list.
 */
_X_EXPORT DisplayModePtr
xf86ModesAdd(DisplayModePtr modes, DisplayModePtr new)
{
    if (modes == NULL)
	return new;

    if (new) {
	DisplayModePtr mode = modes;

	while (mode->next)
	    mode = mode->next;

	mode->next = new;
	new->prev = mode;
    }

    return modes;
}

/**
 * Build a mode list from a list of config file modes
 */
static DisplayModePtr
xf86GetConfigModes (XF86ConfModeLinePtr conf_mode)
{
    DisplayModePtr  head = NULL, prev = NULL, mode;
    
    for (; conf_mode; conf_mode = (XF86ConfModeLinePtr) conf_mode->list.next)
    {
        mode = xcalloc(1, sizeof(DisplayModeRec));
	if (!mode)
	    continue;
        mode->name       = xstrdup(conf_mode->ml_identifier);
	if (!mode->name)
	{
	    xfree (mode);
	    continue;
	}
	mode->type       = 0;
        mode->Clock      = conf_mode->ml_clock;
        mode->HDisplay   = conf_mode->ml_hdisplay;
        mode->HSyncStart = conf_mode->ml_hsyncstart;
        mode->HSyncEnd   = conf_mode->ml_hsyncend;
        mode->HTotal     = conf_mode->ml_htotal;
        mode->VDisplay   = conf_mode->ml_vdisplay;
        mode->VSyncStart = conf_mode->ml_vsyncstart;
        mode->VSyncEnd   = conf_mode->ml_vsyncend;
        mode->VTotal     = conf_mode->ml_vtotal;
        mode->Flags      = conf_mode->ml_flags;
        mode->HSkew      = conf_mode->ml_hskew;
        mode->VScan      = conf_mode->ml_vscan;

        mode->prev = prev;
	mode->next = NULL;
	if (prev)
	    prev->next = mode;
	else
	    head = mode;
	prev = mode;
    }
    return head;
}

/**
 * Build a mode list from a monitor configuration
 */
_X_EXPORT DisplayModePtr
xf86GetMonitorModes (ScrnInfoPtr pScrn, XF86ConfMonitorPtr conf_monitor)
{
    DisplayModePtr	    modes = NULL;
    XF86ConfModesLinkPtr    modes_link;
    
    if (!conf_monitor)
	return NULL;

    /*
     * first we collect the mode lines from the UseModes directive
     */
    for (modes_link = conf_monitor->mon_modes_sect_lst; 
	 modes_link; 
	 modes_link = modes_link->list.next)
    {
	/* If this modes link hasn't been resolved, go look it up now */
	if (!modes_link->ml_modes)
	    modes_link->ml_modes = xf86findModes (modes_link->ml_modes_str, 
						  xf86configptr->conf_modes_lst);
	if (modes_link->ml_modes)
	    modes = xf86ModesAdd (modes,
				  xf86GetConfigModes (modes_link->ml_modes->mon_modeline_lst));
    }

    return xf86ModesAdd (modes,
			 xf86GetConfigModes (conf_monitor->mon_modeline_lst));
}

/**
 * Build a mode list containing all of the default modes
 */
_X_EXPORT DisplayModePtr
xf86GetDefaultModes (Bool interlaceAllowed, Bool doubleScanAllowed)
{
    DisplayModePtr  head = NULL, prev = NULL, mode;
    int		    i;

    for (i = 0; xf86DefaultModes[i].name != NULL; i++)
    {
	DisplayModePtr	defMode = &xf86DefaultModes[i];
	
	if (!interlaceAllowed && (defMode->Flags & V_INTERLACE))
	    continue;
	if (!doubleScanAllowed && (defMode->Flags & V_DBLSCAN))
	    continue;

	mode = xalloc(sizeof(DisplayModeRec));
	if (!mode)
	    continue;
        memcpy(mode,&xf86DefaultModes[i],sizeof(DisplayModeRec));
        mode->name = xstrdup(xf86DefaultModes[i].name);
        if (!mode->name)
	{
	    xfree (mode);
	    continue;
	}
        mode->prev = prev;
	mode->next = NULL;
	if (prev)
	    prev->next = mode;
	else
	    head = mode;
	prev = mode;
    }
    return head;
}