path: root/xorg-server/hw/xfree86/modes/xf86RandR12.c

/*
 * Copyright © 2002 Keith Packard, member of The XFree86 Project, Inc.
 *
 * 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 the copyright holders not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  The copyright holders make no representations
 * about the suitability of this software for any purpose.  It is provided "as
 * is" without express or implied warranty.
 *
 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL THE COPYRIGHT HOLDERS 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_XORG_CONFIG_H
#include <xorg-config.h>
#else
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#endif

#include "xf86.h"
#include "os.h"
#include "globals.h"
#include "xf86.h"
#include "xf86Priv.h"
#include "xf86DDC.h"
#include "mipointer.h"
#include "windowstr.h"
#include "inputstr.h"
#include <randrstr.h>
#include <X11/extensions/render.h>

#include "xf86Crtc.h"
#include "xf86RandR12.h"

typedef struct _xf86RandR12Info {
    int				    virtualX;
    int				    virtualY;
    int				    mmWidth;
    int				    mmHeight;
    int				    maxX;
    int				    maxY;
    int				    pointerX;
    int				    pointerY;
    Rotation			    rotation; /* current mode */
    Rotation                        supported_rotations; /* driver supported */

    /* Used to wrap EnterVT so we can re-probe the outputs when a laptop unsuspends
     * (actually, any time that we switch back into our VT).
     *
     * See https://bugs.freedesktop.org/show_bug.cgi?id=21554
     */
    xf86EnterVTProc *orig_EnterVT;
} XF86RandRInfoRec, *XF86RandRInfoPtr;

#ifdef RANDR_12_INTERFACE
static Bool xf86RandR12Init12 (ScreenPtr pScreen);
static Bool xf86RandR12CreateScreenResources12 (ScreenPtr pScreen);
#endif

static int xf86RandR12Generation;

static DevPrivateKeyRec xf86RandR12KeyRec;
static DevPrivateKey xf86RandR12Key;
#define XF86RANDRINFO(p) ((XF86RandRInfoPtr) \
    dixLookupPrivate(&(p)->devPrivates, xf86RandR12Key))


static int
xf86RandR12ModeRefresh (DisplayModePtr mode)
{
    if (mode->VRefresh)
	return (int) (mode->VRefresh + 0.5);
    else
	return (int) (mode->Clock * 1000.0 / mode->HTotal / mode->VTotal + 0.5);
}

/* Adapt panning area; return TRUE if panning area was valid without adaption */
static int
xf86RandR13VerifyPanningArea (xf86CrtcPtr crtc, int screenWidth, int screenHeight)
{
    int ret = TRUE;

    if (crtc->version < 2)
	return FALSE;

    if (crtc->panningTotalArea.x2 <= crtc->panningTotalArea.x1) {
	/* Panning in X is disabled */
	if (crtc->panningTotalArea.x1 || crtc->panningTotalArea.x2)
	    /* Illegal configuration -> fail/disable */
	    ret = FALSE;
	crtc->panningTotalArea.x1    = crtc->panningTotalArea.x2    = 0;
	crtc->panningTrackingArea.x1 = crtc->panningTrackingArea.x2 = 0;
	crtc->panningBorder[0]       = crtc->panningBorder[2]       = 0;
    } else {
	/* Panning in X is enabled */
	if (crtc->panningTotalArea.x1 < 0) {
	    /* Panning region outside screen -> move inside */
	    crtc->panningTotalArea.x2 -= crtc->panningTotalArea.x1;
	    crtc->panningTotalArea.x1 = 0;
	    ret = FALSE;
	}
	if (crtc->panningTotalArea.x2 < crtc->panningTotalArea.x1 + crtc->mode.HDisplay) {
	    /* Panning region smaller than displayed area -> crop to displayed area */
	    crtc->panningTotalArea.x2 = crtc->panningTotalArea.x1 + crtc->mode.HDisplay;
	    ret = FALSE;
	}
	if (crtc->panningTotalArea.x2 > screenWidth) {
	    /* Panning region larger than screen -> move inside, then crop to screen */
	    crtc->panningTotalArea.x1 -= crtc->panningTotalArea.x2 - screenWidth;
	    crtc->panningTotalArea.x2 = screenWidth;
	    ret = FALSE;
	    if (crtc->panningTotalArea.x1 < 0)
		crtc->panningTotalArea.x1 = 0;
	}
	if (crtc->panningBorder[0] + crtc->panningBorder[2] > crtc->mode.HDisplay) {
	    /* Borders too large -> set to 0 */
	    crtc->panningBorder[0] = crtc->panningBorder[2] = 0;
	    ret = FALSE;
	}
    }

    if (crtc->panningTotalArea.y2 <= crtc->panningTotalArea.y1) {
	/* Panning in Y is disabled */
	if (crtc->panningTotalArea.y1 || crtc->panningTotalArea.y2)
	    /* Illegal configuration -> fail/disable */
	    ret = FALSE;
	crtc->panningTotalArea.y1    = crtc->panningTotalArea.y2    = 0;
	crtc->panningTrackingArea.y1 = crtc->panningTrackingArea.y2 = 0;
	crtc->panningBorder[1]       = crtc->panningBorder[3]       = 0;
    } else {
	/* Panning in Y is enabled */
	if (crtc->panningTotalArea.y1 < 0) {
	    /* Panning region outside screen -> move inside */
	    crtc->panningTotalArea.y2 -= crtc->panningTotalArea.y1;
	    crtc->panningTotalArea.y1 = 0;
	    ret = FALSE;
	}
	if (crtc->panningTotalArea.y2 < crtc->panningTotalArea.y1 + crtc->mode.VDisplay) {
	    /* Panning region smaller than displayed area -> crop to displayed area */
	    crtc->panningTotalArea.y2 = crtc->panningTotalArea.y1 + crtc->mode.VDisplay;
	    ret = FALSE;
	}
	if (crtc->panningTotalArea.y2 > screenHeight) {
	    /* Panning region larger than screen -> move inside, then crop to screen */
	    crtc->panningTotalArea.y1 -= crtc->panningTotalArea.y2 - screenHeight;
	    crtc->panningTotalArea.y2 = screenHeight;
	    ret = FALSE;
	    if (crtc->panningTotalArea.y1 < 0)
		crtc->panningTotalArea.y1 = 0;
	}
	if (crtc->panningBorder[1] + crtc->panningBorder[3] > crtc->mode.VDisplay) {
	    /* Borders too large -> set to 0 */
	    crtc->panningBorder[1] = crtc->panningBorder[3] = 0;
	    ret = FALSE;
	}
    }

    return ret;
}

/*
 * The heart of the panning operation:
 *
 * Given a frame buffer position (fb_x, fb_y),
 * and a crtc position (crtc_x, crtc_y),
 * and a transform matrix which maps frame buffer to crtc,
 * compute a panning position (pan_x, pan_y) that
 * makes the resulting transform line those two up
 */

static void
xf86ComputeCrtcPan (Bool transform_in_use,
		    struct pixman_f_transform *m,
		    double screen_x, double screen_y,
		    double crtc_x, double crtc_y,
		    int old_pan_x, int old_pan_y,
		    int *new_pan_x, int *new_pan_y)
{
    if (transform_in_use) {
	/*
	 * Given the current transform, M, the current position
	 * on the Screen, S, and the desired position on the CRTC,
	 * C, compute a translation, T, such that:
	 *
	 * M T S = C
	 *
	 * where T is of the form
	 *
	 * | 1 0 dx |
	 * | 0 1 dy |
	 * | 0 0 1  |
	 *
	 * M T S =
	 *   | M00 Sx + M01 Sy + M00 dx + M01 dy + M02 |   | Cx F |
	 *   | M10 Sx + M11 Sy + M10 dx + M11 dy + M12 | = | Cy F |
	 *   | M20 Sx + M21 Sy + M20 dx + M21 dy + M22 |   |  F   |
	 *
	 * R = M S
	 *
	 *   Cx F = M00 dx + M01 dy + R0
	 *   Cy F = M10 dx + M11 dy + R1
	 *      F = M20 dx + M21 dy + R2
	 *
	 * Zero out dx, then dy
	 *
	 * F (Cx M10 - Cy M00) =
	 *	    (M10 M01 - M00 M11) dy + M10 R0 - M00 R1
	 * F (M10 - Cy M20) =
	 *	    (M10 M21 - M20 M11) dy + M10 R2 - M20 R1
	 *
	 * F (Cx M11 - Cy M01) =
	 *	    (M11 M00 - M01 M10) dx + M11 R0 - M01 R1
	 * F (M11 - Cy M21) =
	 *	    (M11 M20 - M21 M10) dx + M11 R2 - M21 R1
	 *
	 * Make some temporaries
	 *
	 * T = | Cx M10 - Cy M00 |
	 *     | Cx M11 - Cy M01 |
	 *
	 * U = | M10 M01 - M00 M11 |
	 *     | M11 M00 - M01 M10 |
	 *
	 * Q = | M10 R0 - M00 R1 |
	 *     | M11 R0 - M01 R1 |
	 *
	 * P = | M10 - Cy M20 |
	 *     | M11 - Cy M21 |
	 *
	 * W = | M10 M21 - M20 M11 |
	 *     | M11 M20 - M21 M10 |
	 *
	 * V = | M10 R2 - M20 R1 |
	 *	   | M11 R2 - M21 R1 |
	 *
	 * Rewrite:
	 *
	 * F T0 = U0 dy + Q0
	 * F P0 = W0 dy + V0
	 * F T1 = U1 dx + Q1
	 * F P1 = W1 dx + V1
	 *
	 * Solve for F (two ways)
	 *
	 * F (W0 T0 - U0 P0)  = W0 Q0 - U0 V0
	 *
	 *     W0 Q0 - U0 V0
	 * F = -------------
	 *     W0 T0 - U0 P0
	 *
	 * F (W1 T1 - U1 P1) = W1 Q1 - U1 V1
	 *
	 *     W1 Q1 - U1 V1
	 * F = -------------
	 *     W1 T1 - U1 P1
	 *
	 * We'll use which ever solution works (denominator != 0)
	 *
	 * Finally, solve for dx and dy:
	 *
	 * dx = (F T1 - Q1) / U1
	 * dx = (F P1 - V1) / W1
	 *
	 * dy = (F T0 - Q0) / U0
	 * dy = (F P0 - V0) / W0
	 */
	double			    r[3];
	double			    q[2], u[2], t[2], v[2], w[2], p[2];
	double			    f;
	struct pict_f_vector	    d;
	int			    i;

	/* Get the un-normalized crtc coordinates again */
	for (i = 0; i < 3; i++)
	    r[i] = m->m[i][0] * screen_x + m->m[i][1] * screen_y + m->m[i][2];

	/* Combine values into temporaries */
	for (i = 0; i < 2; i++) {
	    q[i] = m->m[1][i] * r[0] - m->m[0][i] * r[1];
	    u[i] = m->m[1][i] * m->m[0][1-i] - m->m[0][i] * m->m[1][1-i];
	    t[i] = m->m[1][i] * crtc_x - m->m[0][i] * crtc_y;

	    v[i] = m->m[1][i] * r[2] - m->m[2][i] * r[1];
	    w[i] = m->m[1][i] * m->m[2][1-i] - m->m[2][i] * m->m[1][1-i];
	    p[i] = m->m[1][i] - m->m[2][i] * crtc_y;
	}

	/* Find a way to compute f */
	f = 0;
	for (i = 0; i < 2; i++) {
	    double a = w[i] * q[i] - u[i] * v[i];
	    double b = w[i] * t[i] - u[i] * p[i];
	    if (b != 0) {
		f = a/b;
		break;
	    }
	}

	/* Solve for the resulting transform vector */
	for (i = 0; i < 2; i++) {
	    if (u[i])
		d.v[1-i] = (t[i] * f - q[i]) / u[i];
	    else if (w[1])
		d.v[1-i] = (p[i] * f - v[i]) / w[i];
	    else
		d.v[1-i] = 0;
	}
	*new_pan_x = old_pan_x - floor (d.v[0] + 0.5);
	*new_pan_y = old_pan_y - floor (d.v[1] + 0.5);
    } else {
	*new_pan_x = screen_x - crtc_x;
	*new_pan_y = screen_y - crtc_y;
    }
}

static void
xf86RandR13Pan (xf86CrtcPtr crtc, int x, int y)
{
    int newX, newY;
    int width, height;
    Bool panned = FALSE;

    if (crtc->version < 2)
	return;

    if (! crtc->enabled						||
	(crtc->panningTotalArea.x2 <= crtc->panningTotalArea.x1	&&
	 crtc->panningTotalArea.y2 <= crtc->panningTotalArea.y1))
	return;

    newX   = crtc->x;
    newY   = crtc->y;
    width  = crtc->mode.HDisplay;
    height = crtc->mode.VDisplay;

    if ((crtc->panningTrackingArea.x2 <= crtc->panningTrackingArea.x1 ||
	 (x >= crtc->panningTrackingArea.x1 && x < crtc->panningTrackingArea.x2)) &&
	(crtc->panningTrackingArea.y2 <= crtc->panningTrackingArea.y1 ||
	 (y >= crtc->panningTrackingArea.y1 && y < crtc->panningTrackingArea.y2)))
    {
	struct pict_f_vector    c;

	/*
	 * Pre-clip the mouse position to the panning area so that we don't
	 * push the crtc outside. This doesn't deal with changes to the
	 * panning values, only mouse position changes.
	 */
	if (crtc->panningTotalArea.x2 > crtc->panningTotalArea.x1)
	{
	    if (x < crtc->panningTotalArea.x1)
		x = crtc->panningTotalArea.x1;
	    if (x >= crtc->panningTotalArea.x2)
		x = crtc->panningTotalArea.x2 - 1;
	}
	if (crtc->panningTotalArea.y2 > crtc->panningTotalArea.y1)
	{
	    if (y < crtc->panningTotalArea.y1)
		y = crtc->panningTotalArea.y1;
	    if (y >= crtc->panningTotalArea.y2)
		y = crtc->panningTotalArea.y2 - 1;
	}

	c.v[0] = x;
	c.v[1] = y;
	c.v[2] = 1.0;
	if (crtc->transform_in_use) {
	    pixman_f_transform_point(&crtc->f_framebuffer_to_crtc, &c);
	} else {
	    c.v[0] -= crtc->x;
	    c.v[1] -= crtc->y;
	}

	if (crtc->panningTotalArea.x2 > crtc->panningTotalArea.x1) {
	    if (c.v[0] < crtc->panningBorder[0]) {
		c.v[0] = crtc->panningBorder[0];
		panned = TRUE;
	    }
	    if (c.v[0] >= width - crtc->panningBorder[2]) {
		c.v[0] = width - crtc->panningBorder[2] - 1;
		panned = TRUE;
	    }
	}
	if (crtc->panningTotalArea.y2 > crtc->panningTotalArea.y1) {
	    if (c.v[1] < crtc->panningBorder[1]) {
		c.v[1] = crtc->panningBorder[1];
		panned = TRUE;
	    }
	    if (c.v[1] >= height - crtc->panningBorder[3]) {
		c.v[1] = height - crtc->panningBorder[3] - 1;
		panned = TRUE;
	    }
	}
	if (panned)
	    xf86ComputeCrtcPan (crtc->transform_in_use,
				&crtc->f_framebuffer_to_crtc,
				x, y, c.v[0], c.v[1],
				newX, newY, &newX, &newY);
    }

    /*
     * Ensure that the crtc is within the panning region.
     *
     * XXX This computation only works when we do not have a transform
     * in use.
     */
    if (!crtc->transform_in_use)
    {
	/* Validate against [xy]1 after [xy]2, to be sure that results are > 0 for [xy]1 > 0 */
	if (crtc->panningTotalArea.x2 > crtc->panningTotalArea.x1) {
	    if (newX > crtc->panningTotalArea.x2 - width)
		newX =  crtc->panningTotalArea.x2 - width;
	    if (newX <  crtc->panningTotalArea.x1)
		newX =  crtc->panningTotalArea.x1;
	}
	if (crtc->panningTotalArea.y2 > crtc->panningTotalArea.y1) {
	    if (newY > crtc->panningTotalArea.y2 - height)
		newY =  crtc->panningTotalArea.y2 - height;
	    if (newY <  crtc->panningTotalArea.y1)
		newY =  crtc->panningTotalArea.y1;
	}
    }
    if (newX != crtc->x || newY != crtc->y)
	xf86CrtcSetOrigin (crtc, newX, newY);
}

static Bool
xf86RandR12GetInfo (ScreenPtr pScreen, Rotation *rotations)
{
    RRScreenSizePtr	    pSize;
    ScrnInfoPtr		    scrp = XF86SCRNINFO(pScreen);
    XF86RandRInfoPtr	    randrp = XF86RANDRINFO(pScreen);
    DisplayModePtr	    mode;
    int			    refresh0 = 60;
    int			    maxX = 0, maxY = 0;

    *rotations = randrp->supported_rotations;

    if (randrp->virtualX == -1 || randrp->virtualY == -1)
    {
	randrp->virtualX = scrp->virtualX;
	randrp->virtualY = scrp->virtualY;
    }

    /* Re-probe the outputs for new monitors or modes */
    if (scrp->vtSema)
    {
	xf86ProbeOutputModes (scrp, 0, 0);
	xf86SetScrnInfoModes (scrp);
    }

    for (mode = scrp->modes; ; mode = mode->next)
    {
	int refresh = xf86RandR12ModeRefresh (mode);
	if (randrp->maxX == 0 || randrp->maxY == 0)
	{
		if (maxX < mode->HDisplay)
			maxX = mode->HDisplay;
		if (maxY < mode->VDisplay)
			maxY = mode->VDisplay;
	}
	if (mode == scrp->modes)
	    refresh0 = refresh;
	pSize = RRRegisterSize (pScreen,
				mode->HDisplay, mode->VDisplay,
				randrp->mmWidth, randrp->mmHeight);
	if (!pSize)
	    return FALSE;
	RRRegisterRate (pScreen, pSize, refresh);

	if (xf86ModesEqual(mode, scrp->currentMode))
	{
	    RRSetCurrentConfig (pScreen, randrp->rotation, refresh, pSize);
	}
	if (mode->next == scrp->modes)
	    break;
    }

    if (randrp->maxX == 0 || randrp->maxY == 0)
    {
	randrp->maxX = maxX;
	randrp->maxY = maxY;
    }

    return TRUE;
}

static Bool
xf86RandR12SetMode (ScreenPtr	    pScreen,
		  DisplayModePtr    mode,
		  Bool		    useVirtual,
		  int		    mmWidth,
		  int		    mmHeight)
{
    ScrnInfoPtr		scrp = XF86SCRNINFO(pScreen);
    XF86RandRInfoPtr	randrp = XF86RANDRINFO(pScreen);
    int			oldWidth = pScreen->width;
    int			oldHeight = pScreen->height;
    int			oldmmWidth = pScreen->mmWidth;
    int			oldmmHeight = pScreen->mmHeight;
    WindowPtr		pRoot = pScreen->root;
    DisplayModePtr      currentMode = NULL;
    Bool 		ret = TRUE;

    if (pRoot)
	(*scrp->EnableDisableFBAccess) (pScreen->myNum, FALSE);
    if (useVirtual)
    {
	scrp->virtualX = randrp->virtualX;
	scrp->virtualY = randrp->virtualY;
    }
    else
    {
	scrp->virtualX = mode->HDisplay;
	scrp->virtualY = mode->VDisplay;
    }

    if(randrp->rotation & (RR_Rotate_90 | RR_Rotate_270))
    {
	/* If the screen is rotated 90 or 270 degrees, swap the sizes. */
	pScreen->width = scrp->virtualY;
	pScreen->height = scrp->virtualX;
	pScreen->mmWidth = mmHeight;
	pScreen->mmHeight = mmWidth;
    }
    else
    {
	pScreen->width = scrp->virtualX;
	pScreen->height = scrp->virtualY;
	pScreen->mmWidth = mmWidth;
	pScreen->mmHeight = mmHeight;
    }
    if (scrp->currentMode == mode) {
        /* Save current mode */
        currentMode = scrp->currentMode;
        /* Reset, just so we ensure the drivers SwitchMode is called */
        scrp->currentMode = NULL;
    }
    /*
     * We know that if the driver failed to SwitchMode to the rotated
     * version, then it should revert back to it's prior mode.
     */
    if (!xf86SwitchMode (pScreen, mode))
    {
        ret = FALSE;
	scrp->virtualX = pScreen->width = oldWidth;
	scrp->virtualY = pScreen->height = oldHeight;
	pScreen->mmWidth = oldmmWidth;
	pScreen->mmHeight = oldmmHeight;
        scrp->currentMode = currentMode;
    }

    /*
     * Make sure the layout is correct
     */
    xf86ReconfigureLayout();

    /*
     * Make sure the whole screen is visible
     */
    xf86SetViewport (pScreen, pScreen->width, pScreen->height);
    xf86SetViewport (pScreen, 0, 0);
    if (pRoot)
	(*scrp->EnableDisableFBAccess) (pScreen->myNum, TRUE);
    return ret;
}

Bool
xf86RandR12SetConfig (ScreenPtr		pScreen,
		    Rotation		rotation,
		    int			rate,
		    RRScreenSizePtr	pSize)
{
    ScrnInfoPtr		scrp = XF86SCRNINFO(pScreen);
    XF86RandRInfoPtr	randrp = XF86RANDRINFO(pScreen);
    DisplayModePtr	mode;
    int			px, py;
    Bool		useVirtual = FALSE;
    int			maxX = 0, maxY = 0;
    Rotation		oldRotation = randrp->rotation;

    randrp->rotation = rotation;

    if (randrp->virtualX == -1 || randrp->virtualY == -1)
    {
	randrp->virtualX = scrp->virtualX;
	randrp->virtualY = scrp->virtualY;
    }

    miPointerGetPosition (inputInfo.pointer, &px, &py);
    for (mode = scrp->modes; ; mode = mode->next)
    {
	if (randrp->maxX == 0 || randrp->maxY == 0)
	{
		if (maxX < mode->HDisplay)
			maxX = mode->HDisplay;
		if (maxY < mode->VDisplay)
			maxY = mode->VDisplay;
	}
	if (mode->HDisplay == pSize->width &&
	    mode->VDisplay == pSize->height &&
	    (rate == 0 || xf86RandR12ModeRefresh (mode) == rate))
	    break;
	if (mode->next == scrp->modes)
	{
	    if (pSize->width == randrp->virtualX &&
		pSize->height == randrp->virtualY)
	    {
		mode = scrp->modes;
		useVirtual = TRUE;
		break;
	    }
    	    if (randrp->maxX == 0 || randrp->maxY == 0)
    	    {
		randrp->maxX = maxX;
		randrp->maxY = maxY;
    	    }
	    return FALSE;
	}
    }

    if (randrp->maxX == 0 || randrp->maxY == 0)
    {
	randrp->maxX = maxX;
	randrp->maxY = maxY;
    }

    if (!xf86RandR12SetMode (pScreen, mode, useVirtual, pSize->mmWidth,
			   pSize->mmHeight)) {
        randrp->rotation = oldRotation;
	return FALSE;
    }

    /*
     * Move the cursor back where it belongs; SwitchMode repositions it
     */
    if (pScreen == miPointerGetScreen(inputInfo.pointer))
    {
        px = (px >= pScreen->width ? (pScreen->width - 1) : px);
        py = (py >= pScreen->height ? (pScreen->height - 1) : py);

	xf86SetViewport(pScreen, px, py);

	(*pScreen->SetCursorPosition) (inputInfo.pointer, pScreen, px, py, FALSE);
    }

    return TRUE;
}

static Bool
xf86RandR12ScreenSetSize (ScreenPtr	pScreen,
			CARD16		width,
			CARD16		height,
			CARD32		mmWidth,
			CARD32		mmHeight)
{
    XF86RandRInfoPtr	randrp = XF86RANDRINFO(pScreen);
    ScrnInfoPtr		pScrn = XF86SCRNINFO(pScreen);
    xf86CrtcConfigPtr	config = XF86_CRTC_CONFIG_PTR(pScrn);
    WindowPtr		pRoot = pScreen->root;
    PixmapPtr		pScrnPix;
    Bool		ret = FALSE;
    int                 c;

    if (xf86RandR12Key) {
        if (randrp->virtualX == -1 || randrp->virtualY == -1)
        {
	    randrp->virtualX = pScrn->virtualX;
	    randrp->virtualY = pScrn->virtualY;
        }
    }
    if (pRoot && pScrn->vtSema)
	(*pScrn->EnableDisableFBAccess) (pScreen->myNum, FALSE);

    /* Let the driver update virtualX and virtualY */
    if (!(*config->funcs->resize)(pScrn, width, height))
	goto finish;

    ret = TRUE;
    /* Update panning information */
    for (c = 0; c < config->num_crtc; c++) {
	xf86CrtcPtr crtc = config->crtc[c];
	if (crtc->panningTotalArea.x2 > crtc->panningTotalArea.x1 ||
	    crtc->panningTotalArea.y2 > crtc->panningTotalArea.y1) {
	    if (crtc->panningTotalArea.x2 > crtc->panningTrackingArea.x1)
		crtc->panningTotalArea.x2 += width  - pScreen->width;
	    if (crtc->panningTotalArea.y2 > crtc->panningTrackingArea.y1)
		crtc->panningTotalArea.y2 += height - pScreen->height;
	    if (crtc->panningTrackingArea.x2 > crtc->panningTrackingArea.x1)
		crtc->panningTrackingArea.x2 += width  - pScreen->width;
	    if (crtc->panningTrackingArea.y2 > crtc->panningTrackingArea.y1)
		crtc->panningTrackingArea.y2 += height - pScreen->height;
	    xf86RandR13VerifyPanningArea (crtc, width, height);
	    xf86RandR13Pan (crtc, randrp->pointerX, randrp->pointerY);
	}
    }

    pScrnPix = (*pScreen->GetScreenPixmap)(pScreen);
    pScreen->width = pScrnPix->drawable.width = width;
    pScreen->height = pScrnPix->drawable.height = height;
    randrp->mmWidth = pScreen->mmWidth = mmWidth;
    randrp->mmHeight = pScreen->mmHeight = mmHeight;

    xf86SetViewport (pScreen, pScreen->width-1, pScreen->height-1);
    xf86SetViewport (pScreen, 0, 0);

finish:
    if (pRoot && pScrn->vtSema)
	(*pScrn->EnableDisableFBAccess) (pScreen->myNum, TRUE);
#if RANDR_12_INTERFACE
    if (xf86RandR12Key && pScreen->root && ret)
	RRScreenSizeNotify (pScreen);
#endif
    return ret;
}

Rotation
xf86RandR12GetRotation(ScreenPtr pScreen)
{
    XF86RandRInfoPtr	    randrp = XF86RANDRINFO(pScreen);

    return randrp->rotation;
}

Bool
xf86RandR12CreateScreenResources (ScreenPtr pScreen)
{
    ScrnInfoPtr		pScrn = xf86Screens[pScreen->myNum];
    xf86CrtcConfigPtr   config;
    XF86RandRInfoPtr	randrp;
    int			c;
    int			width, height;
    int			mmWidth, mmHeight;
#ifdef PANORAMIX
    /* XXX disable RandR when using Xinerama */
    if (!noPanoramiXExtension)
	return TRUE;
#endif

    config = XF86_CRTC_CONFIG_PTR(pScrn);
    randrp = XF86RANDRINFO(pScreen);
    /*
     * Compute size of screen
     */
    width = 0; height = 0;
    for (c = 0; c < config->num_crtc; c++)
    {
	xf86CrtcPtr crtc = config->crtc[c];
	int	    crtc_width = crtc->x + xf86ModeWidth (&crtc->mode, crtc->rotation);
	int	    crtc_height = crtc->y + xf86ModeHeight (&crtc->mode, crtc->rotation);
	
	if (crtc->enabled) {
	    if (crtc_width > width)
		width = crtc_width;
	    if (crtc_height > height)
		height = crtc_height;
	    if (crtc->panningTotalArea.x2 > width)
		width = crtc->panningTotalArea.x2;
	    if (crtc->panningTotalArea.y2 > height)
		height = crtc->panningTotalArea.y2;
	}
    }
    
    if (width && height)
    {
	/*
	 * Compute physical size of screen
	 */
	if (monitorResolution) 
	{
	    mmWidth = width * 25.4 / monitorResolution;
	    mmHeight = height * 25.4 / monitorResolution;
	}
	else
	{
	    xf86OutputPtr   output = xf86CompatOutput(pScrn);

	    if (output &&
		output->conf_monitor &&
		(output->conf_monitor->mon_width  > 0 &&
		 output->conf_monitor->mon_height > 0))
	    {
		/*
		 * Prefer user configured DisplaySize
		 */
		mmWidth = output->conf_monitor->mon_width;
		mmHeight = output->conf_monitor->mon_height;
	    }
	    else
	    {
		/*
		 * Otherwise, just set the screen to DEFAULT_DPI
		 */
		mmWidth = width * 25.4 / DEFAULT_DPI;
		mmHeight = height * 25.4 / DEFAULT_DPI;
	    }
	}
	xf86DrvMsg(pScrn->scrnIndex, X_INFO,
		   "Setting screen physical size to %d x %d\n",
		   mmWidth, mmHeight);
	/*
	 * This is the initial setting of the screen size.
	 * We have to pre-set it here, otherwise panning would be adapted
	 * to the new screen size.
	 */
	pScreen->width  = width;
	pScreen->height = height;
	xf86RandR12ScreenSetSize (pScreen,
				  width,
				  height,
				  mmWidth,
				  mmHeight);
    }

    if (xf86RandR12Key == NULL)
	return TRUE;

    if (randrp->virtualX == -1 || randrp->virtualY == -1)
    {
	randrp->virtualX = pScrn->virtualX;
	randrp->virtualY = pScrn->virtualY;
    }
    xf86CrtcSetScreenSubpixelOrder (pScreen);
#if RANDR_12_INTERFACE
    if (xf86RandR12CreateScreenResources12 (pScreen))
	return TRUE;
#endif
    return TRUE;
}


Bool
xf86RandR12Init (ScreenPtr pScreen)
{
    rrScrPrivPtr	rp;
    XF86RandRInfoPtr	randrp;

#ifdef PANORAMIX
    /* XXX disable RandR when using Xinerama */
    if (!noPanoramiXExtension)
    {
        if (xf86NumScreens == 1)
            noPanoramiXExtension = TRUE;
        else
            return TRUE;
    }
#endif

    if (xf86RandR12Generation != serverGeneration)
	xf86RandR12Generation = serverGeneration;

    xf86RandR12Key = &xf86RandR12KeyRec;
    if (!dixRegisterPrivateKey(&xf86RandR12KeyRec, PRIVATE_SCREEN, 0))
	return FALSE;

    randrp = malloc(sizeof (XF86RandRInfoRec));
    if (!randrp)
	return FALSE;

    if (!RRScreenInit(pScreen))
    {
	free(randrp);
	return FALSE;
    }
    rp = rrGetScrPriv(pScreen);
    rp->rrGetInfo = xf86RandR12GetInfo;
    rp->rrSetConfig = xf86RandR12SetConfig;

    randrp->virtualX = -1;
    randrp->virtualY = -1;
    randrp->mmWidth = pScreen->mmWidth;
    randrp->mmHeight = pScreen->mmHeight;

    randrp->rotation = RR_Rotate_0; /* initial rotated mode */

    randrp->supported_rotations = RR_Rotate_0;

    randrp->maxX = randrp->maxY = 0;

    dixSetPrivate(&pScreen->devPrivates, xf86RandR12Key, randrp);

#if RANDR_12_INTERFACE
    if (!xf86RandR12Init12 (pScreen))
	return FALSE;
#endif
    return TRUE;
}

void
xf86RandR12CloseScreen (ScreenPtr pScreen)
{
    XF86RandRInfoPtr	randrp;

    if (xf86RandR12Key == NULL)
	return;

    randrp = XF86RANDRINFO(pScreen);
#if RANDR_12_INTERFACE
    xf86Screens[pScreen->myNum]->EnterVT = randrp->orig_EnterVT;
#endif

    free(randrp);
}

void
xf86RandR12SetRotations (ScreenPtr pScreen, Rotation rotations)
{
    XF86RandRInfoPtr	randrp;
#if RANDR_12_INTERFACE
    ScrnInfoPtr		pScrn = xf86Screens[pScreen->myNum];
    int			c;
    xf86CrtcConfigPtr   config = XF86_CRTC_CONFIG_PTR(pScrn);
#endif

    if (xf86RandR12Key == NULL)
	return;

    randrp = XF86RANDRINFO(pScreen);
#if RANDR_12_INTERFACE
    for (c = 0; c < config->num_crtc; c++) {
	xf86CrtcPtr    crtc = config->crtc[c];

	RRCrtcSetRotations (crtc->randr_crtc, rotations);
    }
#endif
    randrp->supported_rotations = rotations;
}

void
xf86RandR12SetTransformSupport (ScreenPtr pScreen, Bool transforms)
{
    XF86RandRInfoPtr	randrp;
#if RANDR_13_INTERFACE
    ScrnInfoPtr		pScrn = xf86Screens[pScreen->myNum];
    int			c;
    xf86CrtcConfigPtr   config = XF86_CRTC_CONFIG_PTR(pScrn);
#endif

    if (xf86RandR12Key == NULL)
	return;

    randrp = XF86RANDRINFO(pScreen);
#if RANDR_13_INTERFACE
    for (c = 0; c < config->num_crtc; c++) {
	xf86CrtcPtr    crtc = config->crtc[c];

	RRCrtcSetTransformSupport (crtc->randr_crtc, transforms);
    }
#endif
}

void
xf86RandR12GetOriginalVirtualSize(ScrnInfoPtr pScrn, int *x, int *y)
{
    ScreenPtr pScreen = screenInfo.screens[pScrn->scrnIndex];

    if (xf86RandR12Generation != serverGeneration ||
	XF86RANDRINFO(pScreen)->virtualX == -1)
    {
	*x = pScrn->virtualX;
	*y = pScrn->virtualY;
    } else {
	XF86RandRInfoPtr randrp = XF86RANDRINFO(pScreen);

	*x = randrp->virtualX;
	*y = randrp->virtualY;
    }
}

#if RANDR_12_INTERFACE

#define FLAG_BITS (RR_HSyncPositive | \
		   RR_HSyncNegative | \
		   RR_VSyncPositive | \
		   RR_VSyncNegative | \
		   RR_Interlace | \
		   RR_DoubleScan | \
		   RR_CSync | \
		   RR_CSyncPositive | \
		   RR_CSyncNegative | \
		   RR_HSkewPresent | \
		   RR_BCast | \
		   RR_PixelMultiplex | \
		   RR_DoubleClock | \
		   RR_ClockDivideBy2)

static Bool
xf86RandRModeMatches (RRModePtr		randr_mode,
		      DisplayModePtr	mode)
{
#if 0
    if (match_name)
    {
	/* check for same name */
	int	len = strlen (mode->name);
	if (randr_mode->mode.nameLength != len)			return FALSE;
	if (memcmp (randr_mode->name, mode->name, len) != 0)	return FALSE;
    }
#endif
    
    /* check for same timings */
    if (randr_mode->mode.dotClock / 1000 != mode->Clock)    return FALSE;
    if (randr_mode->mode.width        != mode->HDisplay)    return FALSE;
    if (randr_mode->mode.hSyncStart   != mode->HSyncStart)  return FALSE;
    if (randr_mode->mode.hSyncEnd     != mode->HSyncEnd)    return FALSE;
    if (randr_mode->mode.hTotal       != mode->HTotal)	    return FALSE;
    if (randr_mode->mode.hSkew        != mode->HSkew)	    return FALSE;
    if (randr_mode->mode.height       != mode->VDisplay)    return FALSE;
    if (randr_mode->mode.vSyncStart   != mode->VSyncStart)  return FALSE;
    if (randr_mode->mode.vSyncEnd     != mode->VSyncEnd)    return FALSE;
    if (randr_mode->mode.vTotal       != mode->VTotal)	    return FALSE;
    
    /* check for same flags (using only the XF86 valid flag bits) */
    if ((randr_mode->mode.modeFlags & FLAG_BITS) != (mode->Flags & FLAG_BITS))
	return FALSE;
    
    /* everything matches */
    return TRUE;
}

static Bool
xf86RandR12CrtcNotify (RRCrtcPtr	randr_crtc)
{
    ScreenPtr		pScreen = randr_crtc->pScreen;
    ScrnInfoPtr		pScrn = xf86Screens[pScreen->myNum];
    xf86CrtcConfigPtr   config = XF86_CRTC_CONFIG_PTR(pScrn);
    RRModePtr		randr_mode = NULL;
    int			x;
    int			y;
    Rotation		rotation;
    int			numOutputs;
    RROutputPtr		*randr_outputs;
    RROutputPtr		randr_output;
    xf86CrtcPtr		crtc = randr_crtc->devPrivate;
    xf86OutputPtr	output;
    int			i, j;
    DisplayModePtr	mode = &crtc->mode;
    Bool		ret;

    randr_outputs = malloc(config->num_output * sizeof (RROutputPtr));
    if (!randr_outputs)
	return FALSE;
    x = crtc->x;
    y = crtc->y;
    rotation = crtc->rotation;
    numOutputs = 0;
    randr_mode = NULL;
    for (i = 0; i < config->num_output; i++)
    {
	output = config->output[i];
	if (output->crtc == crtc)
	{
	    randr_output = output->randr_output;
	    randr_outputs[numOutputs++] = randr_output;
	    /*
	     * We make copies of modes, so pointer equality 
	     * isn't sufficient
	     */
	    for (j = 0; j < randr_output->numModes + randr_output->numUserModes; j++)
	    {
		RRModePtr   m = (j < randr_output->numModes ?
				 randr_output->modes[j] :
				 randr_output->userModes[j-randr_output->numModes]);
					 
		if (xf86RandRModeMatches (m, mode))
		{
		    randr_mode = m;
		    break;
		}
	    }
	}
    }
    ret = RRCrtcNotify (randr_crtc, randr_mode, x, y,
			rotation, 
			crtc->transformPresent ? &crtc->transform : NULL,
			numOutputs, randr_outputs);
    free(randr_outputs);
    return ret;
}

/*
 * Convert a RandR mode to a DisplayMode
 */
static void
xf86RandRModeConvert (ScrnInfoPtr	scrn,
		      RRModePtr		randr_mode,
		      DisplayModePtr	mode)
{
    memset(mode, 0, sizeof(DisplayModeRec));
    mode->status = MODE_OK;

    mode->Clock = randr_mode->mode.dotClock / 1000;
    
    mode->HDisplay = randr_mode->mode.width;
    mode->HSyncStart = randr_mode->mode.hSyncStart;
    mode->HSyncEnd = randr_mode->mode.hSyncEnd;
    mode->HTotal = randr_mode->mode.hTotal;
    mode->HSkew = randr_mode->mode.hSkew;
    
    mode->VDisplay = randr_mode->mode.height;
    mode->VSyncStart = randr_mode->mode.vSyncStart;
    mode->VSyncEnd = randr_mode->mode.vSyncEnd;
    mode->VTotal = randr_mode->mode.vTotal;
    mode->VScan = 0;

    mode->Flags = randr_mode->mode.modeFlags & FLAG_BITS;

    xf86SetModeCrtc (mode, scrn->adjustFlags);
}

static Bool
xf86RandR12CrtcSet (ScreenPtr	    pScreen,
		    RRCrtcPtr	    randr_crtc,
		    RRModePtr	    randr_mode,
		    int		    x,
		    int		    y,
		    Rotation	    rotation,
		    int		    num_randr_outputs,
		    RROutputPtr	    *randr_outputs)
{
    XF86RandRInfoPtr	randrp = XF86RANDRINFO(pScreen);
    ScrnInfoPtr		pScrn = xf86Screens[pScreen->myNum];
    xf86CrtcConfigPtr   config = XF86_CRTC_CONFIG_PTR(pScrn);
    xf86CrtcPtr		crtc = randr_crtc->devPrivate;
    RRTransformPtr	transform;
    Bool		changed = FALSE;
    int			o, ro;
    xf86CrtcPtr		*save_crtcs;
    Bool		save_enabled = crtc->enabled;

    if (!crtc->scrn->vtSema)
	return FALSE;

    save_crtcs = malloc(config->num_output * sizeof (xf86CrtcPtr));
    if ((randr_mode != NULL) != crtc->enabled)
	changed = TRUE;
    else if (randr_mode && !xf86RandRModeMatches (randr_mode, &crtc->mode))
	changed = TRUE;
    
    if (rotation != crtc->rotation)
	changed = TRUE;

    transform = RRCrtcGetTransform (randr_crtc);
    if ((transform != NULL) != crtc->transformPresent)
	changed = TRUE;
    else if (transform && memcmp (&transform->transform, &crtc->transform.transform,
				  sizeof (transform->transform)) != 0)
	changed = TRUE;

    if (x != crtc->x || y != crtc->y)
	changed = TRUE;
    for (o = 0; o < config->num_output; o++) 
    {
	xf86OutputPtr  output = config->output[o];
	xf86CrtcPtr    new_crtc;

	save_crtcs[o] = output->crtc;
	
	if (output->crtc == crtc)
	    new_crtc = NULL;
	else
	    new_crtc = output->crtc;
	for (ro = 0; ro < num_randr_outputs; ro++) 
	    if (output->randr_output == randr_outputs[ro])
	    {
		new_crtc = crtc;
		break;
	    }
	if (new_crtc != output->crtc)
	{
	    changed = TRUE;
	    output->crtc = new_crtc;
	}
    }
    for (ro = 0; ro < num_randr_outputs; ro++) 
        if (randr_outputs[ro]->pendingProperties)
	    changed = TRUE;

    /* XXX need device-independent mode setting code through an API */
    if (changed)
    {
	crtc->enabled = randr_mode != NULL;

	if (randr_mode)
	{
	    DisplayModeRec  mode;
	    RRTransformPtr  transform = RRCrtcGetTransform (randr_crtc);

	    xf86RandRModeConvert (pScrn, randr_mode, &mode);
	    if (!xf86CrtcSetModeTransform (crtc, &mode, rotation, transform, x, y))
	    {
		crtc->enabled = save_enabled;
		for (o = 0; o < config->num_output; o++)
		{
		    xf86OutputPtr	output = config->output[o];
		    output->crtc = save_crtcs[o];
		}
		free(save_crtcs);
		return FALSE;
	    }
	    xf86RandR13VerifyPanningArea (crtc, pScreen->width, pScreen->height);
	    xf86RandR13Pan (crtc, randrp->pointerX, randrp->pointerY);
	    /*
	     * Save the last successful setting for EnterVT
	     */
	    crtc->desiredMode = mode;
	    crtc->desiredRotation = rotation;
	    if (transform) {
		crtc->desiredTransform = *transform;
		crtc->desiredTransformPresent = TRUE;
	    } else
		crtc->desiredTransformPresent = FALSE;

	    crtc->desiredX = x;
	    crtc->desiredY = y;
	}
	xf86DisableUnusedFunctions (pScrn);
    }
    free(save_crtcs);
    return xf86RandR12CrtcNotify (randr_crtc);
}

static Bool
xf86RandR12CrtcSetGamma (ScreenPtr    pScreen,
			 RRCrtcPtr    randr_crtc)
{
    xf86CrtcPtr		crtc = randr_crtc->devPrivate;

    if (crtc->funcs->gamma_set == NULL)
	return FALSE;

    if (!crtc->scrn->vtSema)
	return TRUE;

    /* Realloc local gamma if needed. */
    if (randr_crtc->gammaSize != crtc->gamma_size) {
        CARD16 *tmp_ptr;
        tmp_ptr = realloc(crtc->gamma_red, 3 * crtc->gamma_size * sizeof (CARD16));
        if (!tmp_ptr)
            return FALSE;
        crtc->gamma_red = tmp_ptr;
        crtc->gamma_green = crtc->gamma_red + crtc->gamma_size;
        crtc->gamma_blue = crtc->gamma_green + crtc->gamma_size;
    }

    crtc->gamma_size = randr_crtc->gammaSize;
    memcpy (crtc->gamma_red, randr_crtc->gammaRed, crtc->gamma_size * sizeof (CARD16));
    memcpy (crtc->gamma_green, randr_crtc->gammaGreen, crtc->gamma_size * sizeof (CARD16));
    memcpy (crtc->gamma_blue, randr_crtc->gammaBlue, crtc->gamma_size * sizeof (CARD16));

    /* Only set it when the crtc is actually running.
     * Otherwise it will be set when it's activated.
     */
    if (crtc->active)
	crtc->funcs->gamma_set(crtc, crtc->gamma_red, crtc->gamma_green,
						crtc->gamma_blue, crtc->gamma_size);

    return TRUE;
}

static Bool
xf86RandR12CrtcGetGamma (ScreenPtr    pScreen,
			 RRCrtcPtr    randr_crtc)
{
    xf86CrtcPtr crtc = randr_crtc->devPrivate;

    if (!crtc->gamma_size)
        return FALSE;

    if (!crtc->gamma_red || !crtc->gamma_green || !crtc->gamma_blue)
        return FALSE;

    /* Realloc randr gamma if needed. */
    if (randr_crtc->gammaSize != crtc->gamma_size) {
        CARD16 *tmp_ptr;
        tmp_ptr = realloc(randr_crtc->gammaRed, 3 * crtc->gamma_size * sizeof (CARD16));
        if (!tmp_ptr)
            return FALSE;
        randr_crtc->gammaRed = tmp_ptr;
        randr_crtc->gammaGreen = randr_crtc->gammaRed + crtc->gamma_size;
        randr_crtc->gammaBlue = randr_crtc->gammaGreen + crtc->gamma_size;
    }
    randr_crtc->gammaSize = crtc->gamma_size;
    memcpy (randr_crtc->gammaRed, crtc->gamma_red, crtc->gamma_size * sizeof (CARD16));
    memcpy (randr_crtc->gammaGreen, crtc->gamma_green, crtc->gamma_size * sizeof (CARD16));
    memcpy (randr_crtc->gammaBlue, crtc->gamma_blue, crtc->gamma_size * sizeof (CARD16));

    return TRUE;
}

static Bool
xf86RandR12OutputSetProperty (ScreenPtr pScreen,
			      RROutputPtr randr_output,
			      Atom property,
			      RRPropertyValuePtr value)
{
    xf86OutputPtr output = randr_output->devPrivate;

    /* If we don't have any property handler, then we don't care what the
     * user is setting properties to.
     */
    if (output->funcs->set_property == NULL)
	return TRUE;

    /*
     * This function gets called even when vtSema is FALSE, as
     * drivers will need to remember the correct value to apply
     * when the VT switch occurs
     */
    return output->funcs->set_property(output, property, value);
}

static Bool
xf86RandR13OutputGetProperty (ScreenPtr pScreen,
			      RROutputPtr randr_output,
			      Atom property)
{
    xf86OutputPtr output = randr_output->devPrivate;

    if (output->funcs->get_property == NULL)
	return TRUE;

    /* Should be safe even w/o vtSema */
    return output->funcs->get_property(output, property);
}

static Bool
xf86RandR12OutputValidateMode (ScreenPtr    pScreen,
			       RROutputPtr  randr_output,
			       RRModePtr    randr_mode)
{
    ScrnInfoPtr	    pScrn = xf86Screens[pScreen->myNum];
    xf86OutputPtr   output = randr_output->devPrivate;
    DisplayModeRec  mode;

    xf86RandRModeConvert (pScrn, randr_mode, &mode);
    /*
     * This function may be called when vtSema is FALSE, so
     * the underlying function must either avoid touching the hardware
     * or return FALSE when vtSema is FALSE
     */
    if (output->funcs->mode_valid (output, &mode) != MODE_OK)
	return FALSE;
    return TRUE;
}

static void
xf86RandR12ModeDestroy (ScreenPtr pScreen, RRModePtr randr_mode)
{
}

/**
 * Given a list of xf86 modes and a RandR Output object, construct
 * RandR modes and assign them to the output
 */
static Bool
xf86RROutputSetModes (RROutputPtr randr_output, DisplayModePtr modes)
{
    DisplayModePtr  mode;
    RRModePtr	    *rrmodes = NULL;
    int		    nmode = 0;
    int		    npreferred = 0;
    Bool	    ret = TRUE;
    int		    pref;

    for (mode = modes; mode; mode = mode->next)
	nmode++;

    if (nmode) {
	rrmodes = malloc(nmode * sizeof (RRModePtr));
	
	if (!rrmodes)
	    return FALSE;
	nmode = 0;

	for (pref = 1; pref >= 0; pref--) {
	    for (mode = modes; mode; mode = mode->next) {
		if ((pref != 0) == ((mode->type & M_T_PREFERRED) != 0)) {
		    xRRModeInfo		modeInfo;
		    RRModePtr		rrmode;
		    
		    modeInfo.nameLength = strlen (mode->name);
		    modeInfo.width = mode->HDisplay;
		    modeInfo.dotClock = mode->Clock * 1000;
		    modeInfo.hSyncStart = mode->HSyncStart;
		    modeInfo.hSyncEnd = mode->HSyncEnd;
		    modeInfo.hTotal = mode->HTotal;
		    modeInfo.hSkew = mode->HSkew;

		    modeInfo.height = mode->VDisplay;
		    modeInfo.vSyncStart = mode->VSyncStart;
		    modeInfo.vSyncEnd = mode->VSyncEnd;
		    modeInfo.vTotal = mode->VTotal;
		    modeInfo.modeFlags = mode->Flags;

		    rrmode = RRModeGet (&modeInfo, mode->name);
		    if (rrmode) {
			rrmodes[nmode++] = rrmode;
			npreferred += pref;
		    }
		}
	    }
	}
    }
    
    ret = RROutputSetModes (randr_output, rrmodes, nmode, npreferred);
    free(rrmodes);
    return ret;
}

/*
 * Mirror the current mode configuration to RandR
 */
static Bool
xf86RandR12SetInfo12 (ScreenPtr pScreen)
{
    ScrnInfoPtr		pScrn = xf86Screens[pScreen->myNum];
    xf86CrtcConfigPtr   config = XF86_CRTC_CONFIG_PTR(pScrn);
    RROutputPtr		*clones;
    RRCrtcPtr		*crtcs;
    int			ncrtc;
    int			o, c, l;
    RRCrtcPtr		randr_crtc;
    int			nclone;
    
    clones = malloc(config->num_output * sizeof (RROutputPtr));
    crtcs = malloc(config->num_crtc * sizeof (RRCrtcPtr));
    for (o = 0; o < config->num_output; o++)
    {
	xf86OutputPtr	output = config->output[o];
	
	ncrtc = 0;
	for (c = 0; c < config->num_crtc; c++)
	    if (output->possible_crtcs & (1 << c))
		crtcs[ncrtc++] = config->crtc[c]->randr_crtc;

	if (output->crtc)
	    randr_crtc = output->crtc->randr_crtc;
	else
	    randr_crtc = NULL;

	if (!RROutputSetCrtcs (output->randr_output, crtcs, ncrtc))
	{
	    free(crtcs);
	    free(clones);
	    return FALSE;
	}

	RROutputSetPhysicalSize(output->randr_output, 
				output->mm_width,
				output->mm_height);
	xf86RROutputSetModes (output->randr_output, output->probed_modes);

	switch (output->status) {
	case XF86OutputStatusConnected:
	    RROutputSetConnection (output->randr_output, RR_Connected);
	    break;
	case XF86OutputStatusDisconnected:
	    RROutputSetConnection (output->randr_output, RR_Disconnected);
	    break;
	case XF86OutputStatusUnknown:
	    RROutputSetConnection (output->randr_output, RR_UnknownConnection);
	    break;
	}

	RROutputSetSubpixelOrder (output->randr_output, output->subpixel_order);

	/*
	 * Valid clones
	 */
	nclone = 0;
	for (l = 0; l < config->num_output; l++)
	{
	    xf86OutputPtr	    clone = config->output[l];
	    
	    if (l != o && (output->possible_clones & (1 << l)))
		clones[nclone++] = clone->randr_output;
	}
	if (!RROutputSetClones (output->randr_output, clones, nclone))
	{
	    free(crtcs);
	    free(clones);
	    return FALSE;
	}
    }
    free(crtcs);
    free(clones);
    return TRUE;
}



/*
 * Query the hardware for the current state, then mirror
 * that to RandR
 */
static Bool
xf86RandR12GetInfo12 (ScreenPtr pScreen, Rotation *rotations)
{
    ScrnInfoPtr		pScrn = xf86Screens[pScreen->myNum];

    if (!pScrn->vtSema)
	return TRUE;
    xf86ProbeOutputModes (pScrn, 0, 0);
    xf86SetScrnInfoModes (pScrn);
    return xf86RandR12SetInfo12 (pScreen);
}

static Bool
xf86RandR12CreateObjects12 (ScreenPtr pScreen)
{
    ScrnInfoPtr		pScrn = xf86Screens[pScreen->myNum];
    xf86CrtcConfigPtr   config = XF86_CRTC_CONFIG_PTR(pScrn);
    int			c;
    int			o;
    
    if (!RRInit ())
	return FALSE;

    /*
     * Configure crtcs
     */
    for (c = 0; c < config->num_crtc; c++)
    {
	xf86CrtcPtr    crtc = config->crtc[c];
	
	crtc->randr_crtc = RRCrtcCreate (pScreen, crtc);
	RRCrtcGammaSetSize (crtc->randr_crtc, 256);
    }
    /*
     * Configure outputs
     */
    for (o = 0; o < config->num_output; o++)
    {
	xf86OutputPtr	output = config->output[o];

	output->randr_output = RROutputCreate (pScreen, output->name, 
					       strlen (output->name),
					       output);

	if (output->funcs->create_resources != NULL)
	    output->funcs->create_resources(output);
	RRPostPendingProperties (output->randr_output);
    }
    return TRUE;
}

static Bool
xf86RandR12CreateScreenResources12 (ScreenPtr pScreen)
{
    int			c;
    ScrnInfoPtr		pScrn = xf86Screens[pScreen->myNum];
    xf86CrtcConfigPtr   config = XF86_CRTC_CONFIG_PTR(pScrn);

    if (xf86RandR12Key == NULL)
	return TRUE;

    for (c = 0; c < config->num_crtc; c++)
        xf86RandR12CrtcNotify (config->crtc[c]->randr_crtc);
    
    RRScreenSetSizeRange (pScreen, config->minWidth, config->minHeight,
			  config->maxWidth, config->maxHeight);
    return TRUE;
}

/*
 * Something happened within the screen configuration due
 * to DGA, VidMode or hot key. Tell RandR
 */

void
xf86RandR12TellChanged (ScreenPtr pScreen)
{
    ScrnInfoPtr		pScrn = xf86Screens[pScreen->myNum];
    xf86CrtcConfigPtr   config = XF86_CRTC_CONFIG_PTR(pScrn);
    int			c;

    if (xf86RandR12Key == NULL)
	return;

    xf86RandR12SetInfo12 (pScreen);
    for (c = 0; c < config->num_crtc; c++)
	xf86RandR12CrtcNotify (config->crtc[c]->randr_crtc);

    RRTellChanged (pScreen);
}

static void
xf86RandR12PointerMoved (int scrnIndex, int x, int y)
{
    ScreenPtr		pScreen = screenInfo.screens[scrnIndex];
    ScrnInfoPtr		pScrn   = XF86SCRNINFO(pScreen);
    xf86CrtcConfigPtr	config  = XF86_CRTC_CONFIG_PTR(pScrn);
    XF86RandRInfoPtr	randrp  = XF86RANDRINFO(pScreen);
    int c;

    randrp->pointerX = x;
    randrp->pointerY = y;
    for (c = 0; c < config->num_crtc; c++)
	xf86RandR13Pan (config->crtc[c], x, y);
}

static Bool
xf86RandR13GetPanning (ScreenPtr           pScreen,
		       RRCrtcPtr           randr_crtc,
		       BoxPtr              totalArea,
		       BoxPtr              trackingArea,
		       INT16               *border)
{
    xf86CrtcPtr		crtc = randr_crtc->devPrivate;

    if (crtc->version < 2)
	return FALSE;
    if (totalArea)
	memcpy (totalArea,    &crtc->panningTotalArea,    sizeof(BoxRec));
    if (trackingArea)
	memcpy (trackingArea, &crtc->panningTrackingArea, sizeof(BoxRec));
    if (border)
	memcpy (border,        crtc->panningBorder,       4*sizeof(INT16));

    return TRUE;
}

static Bool
xf86RandR13SetPanning (ScreenPtr           pScreen,
		       RRCrtcPtr           randr_crtc,
		       BoxPtr              totalArea,
		       BoxPtr              trackingArea,
		       INT16               *border)
{
    XF86RandRInfoPtr	randrp  = XF86RANDRINFO(pScreen);
    xf86CrtcPtr		crtc = randr_crtc->devPrivate;
    BoxRec		oldTotalArea;
    BoxRec		oldTrackingArea;
    INT16		oldBorder[4];


    if (crtc->version < 2)
	return FALSE;

    memcpy (&oldTotalArea,    &crtc->panningTotalArea,    sizeof(BoxRec));
    memcpy (&oldTrackingArea, &crtc->panningTrackingArea, sizeof(BoxRec));
    memcpy (oldBorder,         crtc->panningBorder,       4*sizeof(INT16));

    if (totalArea)
	memcpy (&crtc->panningTotalArea, totalArea, sizeof(BoxRec));
    if (trackingArea)
	memcpy (&crtc->panningTrackingArea, trackingArea, sizeof(BoxRec));
    if (border)
	memcpy (crtc->panningBorder, border, 4*sizeof(INT16));

    if (xf86RandR13VerifyPanningArea (crtc, pScreen->width, pScreen->height)) {
	xf86RandR13Pan (crtc, randrp->pointerX, randrp->pointerY);
	return TRUE;
    } else {
	/* Restore old settings */
	memcpy (&crtc->panningTotalArea,    &oldTotalArea,    sizeof(BoxRec));
	memcpy (&crtc->panningTrackingArea, &oldTrackingArea, sizeof(BoxRec));
	memcpy (crtc->panningBorder,         oldBorder,       4*sizeof(INT16));
	return FALSE;
    }
}

/*
 * Compatibility with XF86VidMode's gamma changer.  This necessarily clobbers
 * any per-crtc setup.  You asked for it...
 */

static void
gamma_to_ramp(float gamma, CARD16 *ramp, int size)
{
    int i;

    for (i = 0; i < size; i++) {
	if (gamma == 1.0)
	    ramp[i] = i << 8;
	else
	    ramp[i] = (CARD16)(pow((double)i / (double)(size - 1), 1. / gamma)
			       * (double)(size - 1) * 256);
    }
}

static int
xf86RandR12ChangeGamma(int scrnIndex, Gamma gamma)
{
    CARD16 *points, *red, *green, *blue;
    ScrnInfoPtr pScrn = xf86Screens[scrnIndex];
    RRCrtcPtr crtc = xf86CompatRRCrtc(pScrn);
    int size;

    if (!crtc)
	return Success;

    size = max(0, crtc->gammaSize);
    if (!size)
	return Success;

    points = calloc(size, 3 * sizeof(CARD16));
    if (!points)
	return BadAlloc;

    red = points;
    green = points + size;
    blue = points + 2 * size;

    gamma_to_ramp(gamma.red, red, size);
    gamma_to_ramp(gamma.green, green, size);
    gamma_to_ramp(gamma.blue, blue, size);
    RRCrtcGammaSet(crtc, red, green, blue);

    free(points);

    pScrn->gamma = gamma;

    return Success;
}

static Bool
xf86RandR12EnterVT (int screen_index, int flags)
{
    ScreenPtr        pScreen = screenInfo.screens[screen_index];
    ScrnInfoPtr	     pScrn = xf86Screens[screen_index];
    XF86RandRInfoPtr randrp  = XF86RANDRINFO(pScreen);
    Bool	     ret;

    if (randrp->orig_EnterVT) {
	pScrn->EnterVT = randrp->orig_EnterVT;
	ret = pScrn->EnterVT (screen_index, flags);
	randrp->orig_EnterVT = pScrn->EnterVT;
	pScrn->EnterVT = xf86RandR12EnterVT;
	if (!ret)
	    return FALSE;
    }

    return RRGetInfo (pScreen, TRUE); /* force a re-probe of outputs and notify clients about changes */
}

static Bool
xf86RandR12Init12 (ScreenPtr pScreen)
{
    ScrnInfoPtr		pScrn = xf86Screens[pScreen->myNum];
    rrScrPrivPtr	rp = rrGetScrPriv(pScreen);
    XF86RandRInfoPtr	randrp  = XF86RANDRINFO(pScreen);

    rp->rrGetInfo = xf86RandR12GetInfo12;
    rp->rrScreenSetSize = xf86RandR12ScreenSetSize;
    rp->rrCrtcSet = xf86RandR12CrtcSet;
    rp->rrCrtcSetGamma = xf86RandR12CrtcSetGamma;
    rp->rrCrtcGetGamma = xf86RandR12CrtcGetGamma;
    rp->rrOutputSetProperty = xf86RandR12OutputSetProperty;
    rp->rrOutputValidateMode = xf86RandR12OutputValidateMode;
#if RANDR_13_INTERFACE
    rp->rrOutputGetProperty = xf86RandR13OutputGetProperty;
    rp->rrGetPanning = xf86RandR13GetPanning;
    rp->rrSetPanning = xf86RandR13SetPanning;
#endif
    rp->rrModeDestroy = xf86RandR12ModeDestroy;
    rp->rrSetConfig = NULL;
    pScrn->PointerMoved = xf86RandR12PointerMoved;
    pScrn->ChangeGamma = xf86RandR12ChangeGamma;

    randrp->orig_EnterVT = pScrn->EnterVT;
    pScrn->EnterVT = xf86RandR12EnterVT;

    if (!xf86RandR12CreateObjects12 (pScreen))
	return FALSE;

    /*
     * Configure output modes
     */
    if (!xf86RandR12SetInfo12 (pScreen))
	return FALSE;
    return TRUE;
}

#endif

Bool
xf86RandR12PreInit (ScrnInfoPtr pScrn)
{
    return TRUE;
}