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xrandr.c

/* 
 * Copyright © 2001 Keith Packard, member of The XFree86 Project, Inc.
 * Copyright © 2002 Hewlett Packard Company, Inc.
 * Copyright © 2006 Intel Corporation
 *
 * 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.
 *
 * Thanks to Jim Gettys who wrote most of the client side code,
 * and part of the server code for randr.
 */

#include <stdio.h>
#include <X11/Xlib.h>
#include <X11/Xlibint.h>
#include <X11/Xproto.h>
#include <X11/Xatom.h>
#include <X11/extensions/Xrandr.h>
#include <X11/extensions/Xrender.h> /* we share subpixel information */
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <math.h>

#if RANDR_MAJOR > 1 || (RANDR_MAJOR == 1 && RANDR_MINOR >= 2)
#define HAS_RANDR_1_2 1
#endif

static char *program_name;
static Display    *dpy;
static Window     root;
static int  screen = -1;
static Bool verbose = False;
static Bool automatic = False;
static Bool properties = False;

static char *direction[5] = {
    "normal", 
    "left", 
    "inverted", 
    "right",
    "\n"};

static char *reflections[5] = {
    "normal", 
    "x", 
    "y", 
    "xy",
    "\n"};

/* subpixel order */
static char *order[6] = {
    "unknown",
    "horizontal rgb",
    "horizontal bgr",
    "vertical rgb",
    "vertical bgr",
    "no subpixels"};

static const struct {
    char        *string;
    unsigned long   flag;
} mode_flags[] = {
    { "+HSync", RR_HSyncPositive },
    { "-HSync", RR_HSyncNegative },
    { "+VSync", RR_VSyncPositive },
    { "-VSync", RR_VSyncNegative },
    { "Interlace", RR_Interlace },
    { "DoubleScan", RR_DoubleScan },
    { "CSync",        RR_CSync },
    { "+CSync",       RR_CSyncPositive },
    { "-CSync",       RR_CSyncNegative },
    { NULL,     0 }
};

static void
usage(void)
{
    fprintf(stderr, "usage: %s [options]\n", program_name);
    fprintf(stderr, "  where options are:\n");
    fprintf(stderr, "  -display <display> or -d <display>\n");
    fprintf(stderr, "  -help\n");
    fprintf(stderr, "  -o <normal,inverted,left,right,0,1,2,3>\n");
    fprintf(stderr, "            or --orientation <normal,inverted,left,right,0,1,2,3>\n");
    fprintf(stderr, "  -q        or --query\n");
    fprintf(stderr, "  -s <size>/<width>x<height> or --size <size>/<width>x<height>\n");
    fprintf(stderr, "  -r <rate> or --rate <rate> or --refresh <rate>\n");
    fprintf(stderr, "  -v        or --version\n");
    fprintf(stderr, "  -x        (reflect in x)\n");
    fprintf(stderr, "  -y        (reflect in y)\n");
    fprintf(stderr, "  --screen <screen>\n");
    fprintf(stderr, "  --verbose\n");
    fprintf(stderr, "  --dryrun\n");
#if HAS_RANDR_1_2
    fprintf(stderr, "  --prop or --properties\n");
    fprintf(stderr, "  --fb <width>x<height>\n");
    fprintf(stderr, "  --fbmm <width>x<height>\n");
    fprintf(stderr, "  --dpi <dpi>/<output>\n");
#if 0
    fprintf(stderr, "  --clone\n");
    fprintf(stderr, "  --extend\n");
#endif
    fprintf(stderr, "  --output <output>\n");
    fprintf(stderr, "      --auto\n");
    fprintf(stderr, "      --mode <mode>\n");
    fprintf(stderr, "      --preferred\n");
    fprintf(stderr, "      --pos <x>x<y>\n");
    fprintf(stderr, "      --rate <rate> or --refresh <rate>\n");
    fprintf(stderr, "      --reflect normal,x,y,xy\n");
    fprintf(stderr, "      --rotate normal,inverted,left,right\n");
    fprintf(stderr, "      --left-of <output>\n");
    fprintf(stderr, "      --right-of <output>\n");
    fprintf(stderr, "      --above <output>\n");
    fprintf(stderr, "      --below <output>\n");
    fprintf(stderr, "      --same-as <output>\n");
    fprintf(stderr, "      --set <property> <value>\n");
    fprintf(stderr, "      --off\n");
    fprintf(stderr, "      --crtc <crtc>\n");
    fprintf(stderr, "  --newmode <name> <clock MHz>\n");
    fprintf(stderr, "            <hdisp> <hsync-start> <hsync-end> <htotal>\n");
    fprintf(stderr, "            <vdisp> <vsync-start> <vsync-end> <vtotal>\n");
    fprintf(stderr, "            [+HSync] [-HSync] [+VSync] [-VSync]\n");
    fprintf(stderr, "  --rmmode <name>\n");
    fprintf(stderr, "  --addmode <output> <name>\n");
    fprintf(stderr, "  --delmode <output> <name>\n");
#endif

    exit(1);
    /*NOTREACHED*/
}

static void
fatal (const char *format, ...)
{
    va_list ap;
    
    va_start (ap, format);
    fprintf (stderr, "%s: ", program_name);
    vfprintf (stderr, format, ap);
    va_end (ap);
    exit (1);
    /*NOTREACHED*/
}

static char *
rotation_name (Rotation rotation)
{
    int     i;

    if ((rotation & 0xf) == 0)
      return "normal";
    for (i = 0; i < 4; i++)
      if (rotation & (1 << i))
          return direction[i];
    return "invalid rotation";
}

static char *
reflection_name (Rotation rotation)
{
    rotation &= (RR_Reflect_X|RR_Reflect_Y);
    switch (rotation) {
    case 0:
      return "none";
    case RR_Reflect_X:
      return "X axis";
    case RR_Reflect_Y:
      return "Y axis";
    case RR_Reflect_X|RR_Reflect_Y:
      return "X and Y axis";
    }
    return "invalid reflection";
}

#if HAS_RANDR_1_2
typedef enum _policy {
    clone, extend
} policy_t;

typedef enum _relation {
    left_of, right_of, above, below, same_as,
} relation_t;

typedef enum _changes {
    changes_none = 0,
    changes_crtc = (1 << 0),
    changes_mode = (1 << 1),
    changes_relation = (1 << 2),
    changes_position = (1 << 3),
    changes_rotation = (1 << 4),
    changes_reflection = (1 << 5),
    changes_automatic = (1 << 6),
    changes_refresh = (1 << 7),
    changes_property = (1 << 8),
} changes_t;

typedef enum _name_kind {
    name_none = 0,
    name_string = (1 << 0),
    name_xid = (1 << 1),
    name_index = (1 << 2),
    name_preferred = (1 << 3),
} name_kind_t;

typedef struct {
    name_kind_t       kind;
    char              *string;
    XID               xid;
    int               index;
} name_t;

typedef struct _crtc crtc_t;
typedef struct _output  output_t;
typedef struct _umode   umode_t;
typedef struct _output_prop output_prop_t;

struct _crtc {
    name_t      crtc;
    Bool        changing;
    XRRCrtcInfo       *crtc_info;

    XRRModeInfo       *mode_info;
    int               x;
    int               y;
    Rotation          rotation;
    output_t          **outputs;
    int               noutput;
};

struct _output_prop {
    struct _output_prop *next;
    char          *name;
    char          *value;
};

struct _output {
    struct _output   *next;
    
    changes_t         changes;
    
    output_prop_t   *props;

    name_t      output;
    XRROutputInfo   *output_info;
    
    name_t      crtc;
    crtc_t      *crtc_info;
    crtc_t      *current_crtc_info;
    
    name_t      mode;
    float       refresh;
    XRRModeInfo       *mode_info;
    
    name_t      addmode;

    relation_t        relation;
    char        *relative_to;

    int               x, y;
    Rotation          rotation;
    
    Bool              automatic;
};

typedef enum _umode_action {
    umode_create, umode_destroy, umode_add, umode_delete
} umode_action_t;


struct _umode {
    struct _umode   *next;
    
    umode_action_t  action;
    XRRModeInfo       mode;
    name_t      output;
    name_t      name;
};

static char *connection[3] = {
    "connected",
    "disconnected",
    "unknown connection"};

#define OUTPUT_NAME 1

#define CRTC_OFF    2
#define CRTC_UNSET  3
#define CRTC_INDEX  0x40000000

#define MODE_NAME   1
#define MODE_OFF    2
#define MODE_UNSET  3
#define MODE_PREF   4

#define POS_UNSET   -1

static output_t   *outputs = NULL;
static output_t   **outputs_tail = &outputs;
static crtc_t     *crtcs;
static umode_t    *umodes;
static int  num_crtcs;
static XRRScreenResources  *res;
static int  fb_width = 0, fb_height = 0;
static int  fb_width_mm = 0, fb_height_mm = 0;
static float      dpi = 0;
static char *dpi_output = NULL;
static Bool dryrun = False;
static int  minWidth, maxWidth, minHeight, maxHeight;
static Bool       has_1_2 = False;

static int
mode_height (XRRModeInfo *mode_info, Rotation rotation)
{
    switch (rotation & 0xf) {
    case RR_Rotate_0:
    case RR_Rotate_180:
      return mode_info->height;
    case RR_Rotate_90:
    case RR_Rotate_270:
      return mode_info->width;
    default:
      return 0;
    }
}

static int
mode_width (XRRModeInfo *mode_info, Rotation rotation)
{
    switch (rotation & 0xf) {
    case RR_Rotate_0:
    case RR_Rotate_180:
      return mode_info->width;
    case RR_Rotate_90:
    case RR_Rotate_270:
      return mode_info->height;
    default:
      return 0;
    }
}

/* v refresh frequency in Hz */
static float
mode_refresh (XRRModeInfo *mode_info)
{
    float rate;
    
    if (mode_info->hTotal && mode_info->vTotal)
      rate = ((float) mode_info->dotClock / 
            ((float) mode_info->hTotal * (float) mode_info->vTotal));
    else
      rate = 0;
    return rate;
}

/* h sync frequency in Hz */
static float
mode_hsync (XRRModeInfo *mode_info)
{
    float rate;
    
    if (mode_info->hTotal)
      rate = (float) mode_info->dotClock / (float) mode_info->hTotal;
    else
      rate = 0;
    return rate;
}

static void
init_name (name_t *name)
{
    name->kind = name_none;
}

static void
set_name_string (name_t *name, char *string)
{
    name->kind |= name_string;
    name->string = string;
}

static void
set_name_xid (name_t *name, XID xid)
{
    name->kind |= name_xid;
    name->xid = xid;
}

static void
set_name_index (name_t *name, int index)
{
    name->kind |= name_index;
    name->index = index;
}

static void
set_name_preferred (name_t *name)
{
    name->kind |= name_preferred;
}

static void
set_name_all (name_t *name, name_t *old)
{
    if (old->kind & name_xid)
      name->xid = old->xid;
    if (old->kind & name_string)
      name->string = old->string;
    if (old->kind & name_index)
      name->index = old->index;
    name->kind |= old->kind;
}

static void
set_name (name_t *name, char *string, name_kind_t valid)
{
    XID     xid;
    int index;

    if ((valid & name_xid) && sscanf (string, "0x%x", &xid) == 1)
      set_name_xid (name, xid);
    else if ((valid & name_index) && sscanf (string, "%d", &index) == 1)
      set_name_index (name, index);
    else if (valid & name_string)
      set_name_string (name, string);
    else
      usage ();
}

static output_t *
add_output (void)
{
    output_t *output = calloc (1, sizeof (output_t));

    if (!output)
      fatal ("out of memory");
    output->next = NULL;
    *outputs_tail = output;
    outputs_tail = &output->next;
    return output;
}

static output_t *
find_output (name_t *name)
{
    output_t *output;

    for (output = outputs; output; output = output->next)
    {
      name_kind_t common = name->kind & output->output.kind;
      
      if ((common & name_xid) && name->xid == output->output.xid)
          break;
      if ((common & name_string) && !strcmp (name->string, output->output.string))
          break;
      if ((common & name_index) && name->index == output->output.index)
          break;
    }
    return output;
}

static output_t *
find_output_by_xid (RROutput output)
{
    name_t  output_name;

    init_name (&output_name);
    set_name_xid (&output_name, output);
    return find_output (&output_name);
}

static output_t *
find_output_by_name (char *name)
{
    name_t  output_name;

    init_name (&output_name);
    set_name_string (&output_name, name);
    return find_output (&output_name);
}

static crtc_t *
find_crtc (name_t *name)
{
    int         c;
    crtc_t  *crtc = NULL;

    for (c = 0; c < num_crtcs; c++)
    {
      name_kind_t common;
      
      crtc = &crtcs[c];
      common = name->kind & crtc->crtc.kind;
      
      if ((common & name_xid) && name->xid == crtc->crtc.xid)
          break;
      if ((common & name_string) && !strcmp (name->string, crtc->crtc.string))
          break;
      if ((common & name_index) && name->index == crtc->crtc.index)
          break;
      crtc = NULL;
    }
    return crtc;
}

static crtc_t *
find_crtc_by_xid (RRCrtc crtc)
{
    name_t  crtc_name;

    init_name (&crtc_name);
    set_name_xid (&crtc_name, crtc);
    return find_crtc (&crtc_name);
}

static XRRModeInfo *
find_mode (name_t *name, float refresh)
{
    int           m;
    XRRModeInfo   *best = NULL;
    float   bestDist = 0;

    for (m = 0; m < res->nmode; m++)
    {
      XRRModeInfo *mode = &res->modes[m];
      if ((name->kind & name_xid) && name->xid == mode->id)
      {
          best = mode;
          break;
      }
      if ((name->kind & name_string) && !strcmp (name->string, mode->name))
      {
          float   dist;
          
          if (refresh)
            dist = fabs (mode_refresh (mode) - refresh);
          else
            dist = 0;
          if (!best || dist < bestDist)
          {
            bestDist = dist;
            best = mode;
          }
          break;
      }
    }
    return best;
}

static XRRModeInfo *
find_mode_by_xid (RRMode mode)
{
    name_t  mode_name;

    init_name (&mode_name);
    set_name_xid (&mode_name, mode);
    return find_mode (&mode_name, 0);
}

static XRRModeInfo *
find_mode_by_name (char *name)
{
    name_t  mode_name;
    init_name (&mode_name);
    set_name_string (&mode_name, name);
    return find_mode (&mode_name, 0);
}

static
XRRModeInfo *
find_mode_for_output (output_t *output, name_t *name)
{
    XRROutputInfo   *output_info = output->output_info;
    int               m;
    XRRModeInfo       *best = NULL;
    float       bestDist = 0;

    for (m = 0; m < output_info->nmode; m++)
    {
      XRRModeInfo     *mode;
      
      mode = find_mode_by_xid (output_info->modes[m]);
      if (!mode) continue;
      if ((name->kind & name_xid) && name->xid == mode->id)
      {
          best = mode;
          break;
      }
      if ((name->kind & name_string) && !strcmp (name->string, mode->name))
      {
          float   dist;
          
          if (output->refresh)
            dist = fabs (mode_refresh (mode) - output->refresh);
          else
            dist = 0;
          if (!best || dist < bestDist)
          {
            bestDist = dist;
            best = mode;
          }
      }
    }
    return best;
}

XRRModeInfo *
preferred_mode (output_t *output)
{
    XRROutputInfo   *output_info = output->output_info;
    int               m;
    XRRModeInfo       *best;
    int               bestDist;
    
    best = NULL;
    bestDist = 0;
    for (m = 0; m < output_info->nmode; m++)
    {
      XRRModeInfo *mode_info = find_mode_by_xid (output_info->modes[m]);
      int       dist;
      
      if (m < output_info->npreferred)
          dist = 0;
      else if (output_info->mm_height)
          dist = (1000 * DisplayHeight(dpy, screen) / DisplayHeightMM(dpy, screen) -
                1000 * mode_info->height / output_info->mm_height);
      else
          dist = DisplayHeight(dpy, screen) - mode_info->height;

        if (dist < 0) dist = -dist;
      if (!best || dist < bestDist)
      {
          best = mode_info;
          bestDist = dist;
      }
    }
    return best;
}

static Bool
output_can_use_crtc (output_t *output, crtc_t *crtc)
{
    XRROutputInfo   *output_info = output->output_info;
    int               c;

    for (c = 0; c < output_info->ncrtc; c++)
      if (output_info->crtcs[c] == crtc->crtc.xid)
          return True;
    return False;
}

static Bool
output_can_use_mode (output_t *output, XRRModeInfo *mode)
{
    XRROutputInfo   *output_info = output->output_info;
    int               m;

    for (m = 0; m < output_info->nmode; m++)
      if (output_info->modes[m] == mode->id)
          return True;
    return False;
}

static Bool
crtc_can_use_rotation (crtc_t *crtc, Rotation rotation)
{
    Rotation      rotations = crtc->crtc_info->rotations;
    Rotation      dir = rotation & (RR_Rotate_0|RR_Rotate_90|RR_Rotate_180|RR_Rotate_270);
    Rotation      reflect = rotation & (RR_Reflect_X|RR_Reflect_Y);
    if (((rotations & dir) != 0) && ((rotations & reflect) == reflect))
      return True;
    return False;
}

/*
 * Report only rotations that are supported by all crtcs
 */
static Rotation
output_rotations (output_t *output)
{
    Bool        found = False;
    Rotation          rotation = RR_Rotate_0;
    XRROutputInfo   *output_info = output->output_info;
    int               c;
    
    for (c = 0; c < output_info->ncrtc; c++)
    {
      crtc_t      *crtc = find_crtc_by_xid (output_info->crtcs[c]);
      if (crtc)
      {
          if (!found) {
            rotation = crtc->crtc_info->rotations;
            found = True;
          } else
            rotation &= crtc->crtc_info->rotations;
      }
    }
    return rotation;
}

static Bool
output_can_use_rotation (output_t *output, Rotation rotation)
{
    XRROutputInfo   *output_info = output->output_info;
    int               c;

    /* make sure all of the crtcs can use this rotation.
     * yes, this is not strictly necessary, but it is 
     * simpler,and we expect most drivers to either
     * support rotation everywhere or nowhere
     */
    for (c = 0; c < output_info->ncrtc; c++)
    {
      crtc_t      *crtc = find_crtc_by_xid (output_info->crtcs[c]);
      if (crtc && !crtc_can_use_rotation (crtc, rotation))
          return False;
    }
    return True;
}

static void
set_output_info (output_t *output, RROutput xid, XRROutputInfo *output_info)
{
    /* sanity check output info */
    if (output_info->connection != RR_Disconnected && !output_info->nmode)
      fatal ("Output %s is not disconnected but has no modes\n",
             output_info->name);
    
    /* set output name and info */
    if (!(output->output.kind & name_xid))
      set_name_xid (&output->output, xid);
    if (!(output->output.kind & name_string))
      set_name_string (&output->output, output_info->name);
    output->output_info = output_info;
    
    /* set crtc name and info */
    if (!(output->changes & changes_crtc))
      set_name_xid (&output->crtc, output_info->crtc);
    
    if (output->crtc.kind == name_xid && output->crtc.xid == None)
      output->crtc_info = NULL;
    else
    {
      output->crtc_info = find_crtc (&output->crtc);
      if (!output->crtc_info)
      {
          if (output->crtc.kind & name_xid)
            fatal ("cannot find crtc 0x%x\n", output->crtc.xid);
          if (output->crtc.kind & name_index)
            fatal ("cannot find crtc %d\n", output->crtc.index);
      }
      if (!output_can_use_crtc (output, output->crtc_info))
          fatal ("output %s cannot use crtc 0x%x\n", output->output.string,
               output->crtc_info->crtc.xid);
    }

    /* set mode name and info */
    if (!(output->changes & changes_mode))
    {
      if (output->crtc_info)
          set_name_xid (&output->mode, output->crtc_info->crtc_info->mode);
      else
          set_name_xid (&output->mode, None);
      if (output->mode.xid)
      {
          output->mode_info = find_mode_by_xid (output->mode.xid);
          if (!output->mode_info)
            fatal ("server did not report mode 0x%x for output %s\n",
                   output->mode.xid, output->output.string);
      }
      else
          output->mode_info = NULL;
    }
    else if (output->mode.kind == name_xid && output->mode.xid == None)
      output->mode_info = NULL;
    else
    {
      if (output->mode.kind == name_preferred)
          output->mode_info = preferred_mode (output);
      else
          output->mode_info = find_mode_for_output (output, &output->mode);
      if (!output->mode_info)
      {
          if (output->mode.kind & name_preferred)
            fatal ("cannot find preferred mode\n");
          if (output->mode.kind & name_string)
            fatal ("cannot find mode %s\n", output->mode.string);
          if (output->mode.kind & name_xid)
            fatal ("cannot find mode 0x%x\n", output->mode.xid);
      }
      if (!output_can_use_mode (output, output->mode_info))
          fatal ("output %s cannot use mode %s\n", output->output.string,
               output->mode_info->name);
    }

    /* set position */
    if (!(output->changes & changes_position))
    {
      if (output->crtc_info)
      {
          output->x = output->crtc_info->crtc_info->x;
          output->y = output->crtc_info->crtc_info->y;
      }
      else
      {
          output->x = 0;
          output->y = 0;
      }
    }

    /* set rotation */
    if (!(output->changes & changes_rotation))
    {
      output->rotation &= ~0xf;
      if (output->crtc_info)
          output->rotation |= (output->crtc_info->crtc_info->rotation & 0xf);
      else
          output->rotation = RR_Rotate_0;
    }
    if (!(output->changes & changes_reflection))
    {
      output->rotation &= ~(RR_Reflect_X|RR_Reflect_Y);
      if (output->crtc_info)
          output->rotation |= (output->crtc_info->crtc_info->rotation &
                         (RR_Reflect_X|RR_Reflect_Y));
    }
    if (!output_can_use_rotation (output, output->rotation))
      fatal ("output %s cannot use rotation \"%s\" reflection \"%s\"\n",
             output->output.string,
             rotation_name (output->rotation),
             reflection_name (output->rotation));
}
    
static void
get_screen (void)
{
    if (!has_1_2)
        fatal ("Server RandR version before 1.2\n");
    
    XRRGetScreenSizeRange (dpy, root, &minWidth, &minHeight,
                     &maxWidth, &maxHeight);
    
    res = XRRGetScreenResources (dpy, root);
    if (!res) fatal ("could not get screen resources");
}

static void
get_crtcs (void)
{
    int           c;

    num_crtcs = res->ncrtc;
    crtcs = calloc (num_crtcs, sizeof (crtc_t));
    if (!crtcs) fatal ("out of memory");
    
    for (c = 0; c < res->ncrtc; c++)
    {
      XRRCrtcInfo *crtc_info = XRRGetCrtcInfo (dpy, res, res->crtcs[c]);
      set_name_xid (&crtcs[c].crtc, res->crtcs[c]);
      set_name_index (&crtcs[c].crtc, c);
      if (!crtc_info) fatal ("could not get crtc 0x%x information", res->crtcs[c]);
      crtcs[c].crtc_info = crtc_info;
      if (crtc_info->mode == None)
      {
          crtcs[c].mode_info = NULL;
          crtcs[c].x = 0;
          crtcs[c].y = 0;
          crtcs[c].rotation = RR_Rotate_0;
      }
    }
}

static void
crtc_add_output (crtc_t *crtc, output_t *output)
{
    if (crtc->outputs)
      crtc->outputs = realloc (crtc->outputs, (crtc->noutput + 1) * sizeof (output_t *));
    else
    {
      crtc->outputs = malloc (sizeof (output_t *));
      crtc->x = output->x;
      crtc->y = output->y;
      crtc->rotation = output->rotation;
      crtc->mode_info = output->mode_info;
    }
    if (!crtc->outputs) fatal ("out of memory");
    crtc->outputs[crtc->noutput++] = output;
}

static void
set_crtcs (void)
{
    output_t      *output;

    for (output = outputs; output; output = output->next)
    {
      if (!output->mode_info) continue;
      crtc_add_output (output->crtc_info, output);
    }
}

static Status
crtc_disable (crtc_t *crtc)
{
    if (verbose)
      printf ("crtc %d: disable\n", crtc->crtc.index);
      
    if (dryrun)
      return RRSetConfigSuccess;
    return XRRSetCrtcConfig (dpy, res, crtc->crtc.xid, CurrentTime,
                       0, 0, None, RR_Rotate_0, NULL, 0);
}

static Status
crtc_revert (crtc_t *crtc)
{
    XRRCrtcInfo   *crtc_info = crtc->crtc_info;
    
    if (verbose)
      printf ("crtc %d: revert\n", crtc->crtc.index);
      
    if (dryrun)
      return RRSetConfigSuccess;
    return XRRSetCrtcConfig (dpy, res, crtc->crtc.xid, CurrentTime,
                      crtc_info->x, crtc_info->y,
                      crtc_info->mode, crtc_info->rotation,
                      crtc_info->outputs, crtc_info->noutput);
}

static Status
crtc_apply (crtc_t *crtc)
{
    RROutput      *rr_outputs;
    int           o;
    Status  s;
    RRMode  mode = None;

    if (!crtc->changing || !crtc->mode_info)
      return RRSetConfigSuccess;

    rr_outputs = calloc (crtc->noutput, sizeof (RROutput));
    if (!rr_outputs)
      return BadAlloc;
    for (o = 0; o < crtc->noutput; o++)
      rr_outputs[o] = crtc->outputs[o]->output.xid;
    mode = crtc->mode_info->id;
    if (verbose) {
      printf ("crtc %d: %12s %6.1f +%d+%d", crtc->crtc.index,
            crtc->mode_info->name, mode_refresh (crtc->mode_info),
            crtc->x, crtc->y);
      for (o = 0; o < crtc->noutput; o++)
          printf (" \"%s\"", crtc->outputs[o]->output.string);
      printf ("\n");
    }
    
    if (dryrun)
      s = RRSetConfigSuccess;
    else
      s = XRRSetCrtcConfig (dpy, res, crtc->crtc.xid, CurrentTime,
                        crtc->x, crtc->y, mode, crtc->rotation,
                        rr_outputs, crtc->noutput);
    free (rr_outputs);
    return s;
}

static void
screen_revert (void)
{
    if (verbose)
      printf ("screen %d: revert\n", screen);

    if (dryrun)
      return;
    XRRSetScreenSize (dpy, root,
                  DisplayWidth (dpy, screen),
                  DisplayHeight (dpy, screen),
                  DisplayWidthMM (dpy, screen),
                  DisplayHeightMM (dpy, screen));
}

static void
screen_apply (void)
{
    if (fb_width == DisplayWidth (dpy, screen) &&
      fb_height == DisplayHeight (dpy, screen) &&
      fb_width_mm == DisplayWidthMM (dpy, screen) &&
      fb_height_mm == DisplayHeightMM (dpy, screen))
    {
      return;
    }
    if (verbose)
      printf ("screen %d: %dx%d %dx%d mm %6.2fdpi\n", screen,
            fb_width, fb_height, fb_width_mm, fb_height_mm, dpi);
    if (dryrun)
      return;
    XRRSetScreenSize (dpy, root, fb_width, fb_height,
                  fb_width_mm, fb_height_mm);
}

static void
revert (void)
{
    int     c;

    /* first disable all crtcs */
    for (c = 0; c < res->ncrtc; c++)
      crtc_disable (&crtcs[c]);
    /* next reset screen size */
    screen_revert ();
    /* now restore all crtcs */
    for (c = 0; c < res->ncrtc; c++)
      crtc_revert (&crtcs[c]);
}

/*
 * uh-oh, something bad happened in the middle of changing
 * the configuration. Revert to the previous configuration
 * and bail
 */
static void
panic (Status s, crtc_t *crtc)
{
    int         c = crtc->crtc.index;
    char    *message;
    
    switch (s) {
    case RRSetConfigSuccess:        message = "succeeded";            break;
    case BadAlloc:                  message = "out of memory";        break;
    case RRSetConfigFailed:         message = "failed";               break;
    case RRSetConfigInvalidConfigTime:    message = "invalid config time";    break;
    case RRSetConfigInvalidTime:    message = "invalid time";         break;
    default:                        message = "unknown failure";      break;
    }
    
    fprintf (stderr, "%s: Configure crtc %d %s\n", program_name, c, message);
    revert ();
    exit (1);
}

void
apply (void)
{
    Status  s;
    int         c;
    
    /*
     * Turn off any crtcs which are to be disabled or which are
     * larger than the target size
     */
    for (c = 0; c < res->ncrtc; c++)
    {
      crtc_t          *crtc = &crtcs[c];
      XRRCrtcInfo *crtc_info = crtc->crtc_info;

      /* if this crtc is already disabled, skip it */
      if (crtc_info->mode == None) 
          continue;
      
      /* 
       * If this crtc is to be left enabled, make
       * sure the old size fits then new screen
       */
      if (crtc->mode_info) 
      {
          XRRModeInfo   *old_mode = find_mode_by_xid (crtc_info->mode);
          int x, y, w, h;

          if (!old_mode) 
            panic (RRSetConfigFailed, crtc);
          
          /* old position and size information */
          x = crtc_info->x;
          y = crtc_info->y;
          w = mode_width (old_mode, crtc_info->rotation);
          h = mode_height (old_mode, crtc_info->rotation);
          
          /* if it fits, skip it */
          if (x + w <= fb_width && y + h <= fb_height) 
            continue;
          crtc->changing = True;
      }
      s = crtc_disable (crtc);
      if (s != RRSetConfigSuccess)
          panic (s, crtc);
    }

    /*
     * Hold the server grabbed while messing with
     * the screen so that apps which notice the resize
     * event and ask for xinerama information from the server
     * receive up-to-date information
     */
    XGrabServer (dpy);
    
    /*
     * Set the screen size
     */
    screen_apply ();
    
    /*
     * Set crtcs
     */

    for (c = 0; c < res->ncrtc; c++)
    {
      crtc_t      *crtc = &crtcs[c];
      
      s = crtc_apply (crtc);
      if (s != RRSetConfigSuccess)
          panic (s, crtc);
    }
    /*
     * Release the server grab and let all clients
     * respond to the updated state
     */
    XUngrabServer (dpy);
}

/*
 * Use current output state to complete the output list
 */
void
get_outputs (void)
{
    int           o;
    
    for (o = 0; o < res->noutput; o++)
    {
      XRROutputInfo     *output_info = XRRGetOutputInfo (dpy, res, res->outputs[o]);
      output_t    *output;
      name_t            output_name;
      if (!output_info) fatal ("could not get output 0x%x information", res->outputs[o]);
      set_name_xid (&output_name, res->outputs[o]);
      set_name_index (&output_name, o);
      set_name_string (&output_name, output_info->name);
      output = find_output (&output_name);
      if (!output)
      {
          output = add_output ();
          set_name_all (&output->output, &output_name);
          /*
           * When global --automatic mode is set, turn on connected but off
           * outputs, turn off disconnected but on outputs
           */
          if (automatic)
          {
            switch (output_info->connection) {
            case RR_Connected:
                if (!output_info->crtc) {
                  output->changes |= changes_automatic;
                  output->automatic = True;
                }
                break;
            case RR_Disconnected:
                if (output_info->crtc)
                {
                  output->changes |= changes_automatic;
                  output->automatic = True;
                }
                break;
            }
          }
      }

      /*
       * Automatic mode -- track connection state and enable/disable outputs
       * as necessary
       */
      if (output->automatic)
      {
          switch (output_info->connection) {
          case RR_Connected:
          case RR_UnknownConnection:
            if ((!(output->changes & changes_mode)))
            {
                set_name_preferred (&output->mode);
                output->changes |= changes_mode;
            }
            break;
          case RR_Disconnected:
            if ((!(output->changes & changes_mode)))
            {
                set_name_xid (&output->mode, None);
                set_name_xid (&output->crtc, None);
                output->changes |= changes_mode;
                output->changes |= changes_crtc;
            }
            break;
          }
      }

      set_output_info (output, res->outputs[o], output_info);
    }
}

void
mark_changing_crtcs (void)
{
    int     c;

    for (c = 0; c < num_crtcs; c++)
    {
      crtc_t          *crtc = &crtcs[c];
      int       o;
      output_t    *output;

      /* walk old output list (to catch disables) */
      for (o = 0; o < crtc->crtc_info->noutput; o++)
      {
          output = find_output_by_xid (crtc->crtc_info->outputs[o]);
          if (!output) fatal ("cannot find output 0x%x\n",
                        crtc->crtc_info->outputs[o]);
          if (output->changes)
            crtc->changing = True;
      }
      /* walk new output list */
      for (o = 0; o < crtc->noutput; o++)
      {
          output = crtc->outputs[o];
          if (output->changes)
            crtc->changing = True;
      }
    }
}

/*
 * Test whether 'crtc' can be used for 'output'
 */
Bool
check_crtc_for_output (crtc_t *crtc, output_t *output)
{
    int           c;
    int           l;
    output_t    *other;
    
    for (c = 0; c < output->output_info->ncrtc; c++)
      if (output->output_info->crtcs[c] == crtc->crtc.xid)
          break;
    if (c == output->output_info->ncrtc)
      return False;
    for (other = outputs; other; other = other->next)
    {
      if (other == output)
          continue;

      if (other->mode_info == NULL)
          continue;

      if (other->crtc_info != crtc)
          continue;

      /* see if the output connected to the crtc can clone to this output */
      for (l = 0; l < output->output_info->nclone; l++)
          if (output->output_info->clones[l] == other->output.xid)
            break;
      /* not on the list, can't clone */
      if (l == output->output_info->nclone) 
          return False;
    }

    if (crtc->noutput)
    {
      /* make sure the state matches */
      if (crtc->mode_info != output->mode_info)
          return False;
      if (crtc->x != output->x)
          return False;
      if (crtc->y != output->y)
          return False;
      if (crtc->rotation != output->rotation)
          return False;
    }
    return True;
}

crtc_t *
find_crtc_for_output (output_t *output)
{
    int         c;

    for (c = 0; c < output->output_info->ncrtc; c++)
    {
      crtc_t          *crtc;

      crtc = find_crtc_by_xid (output->output_info->crtcs[c]);
      if (!crtc) fatal ("cannot find crtc 0x%x\n", output->output_info->crtcs[c]);

      if (check_crtc_for_output (crtc, output))
          return crtc;
    }
    return NULL;
}

static void
set_positions (void)
{
    output_t      *output;
    Bool    keep_going;
    Bool    any_set;
    int           min_x, min_y;

    for (;;)
    {
      any_set = False;
      keep_going = False;
      for (output = outputs; output; output = output->next)
      {
          output_t    *relation;
          name_t  relation_name;

          if (!(output->changes & changes_relation)) continue;
          
          if (output->mode_info == NULL) continue;

          init_name (&relation_name);
          set_name_string (&relation_name, output->relative_to);
          relation = find_output (&relation_name);
          if (!relation) fatal ("cannot find output \"%s\"\n", output->relative_to);
          
          if (relation->mode_info == NULL) 
          {
            output->x = 0;
            output->y = 0;
            output->changes |= changes_position;
            any_set = True;
            continue;
          }
          /*
           * Make sure the dependent object has been set in place
           */
          if ((relation->changes & changes_relation) && 
            !(relation->changes & changes_position))
          {
            keep_going = True;
            continue;
          }
          
          switch (output->relation) {
          case left_of:
            output->y = relation->y;
            output->x = relation->x - mode_width (output->mode_info, output->rotation);
            break;
          case right_of:
            output->y = relation->y;
            output->x = relation->x + mode_width (relation->mode_info, relation->rotation);
            break;
          case above:
            output->x = relation->x;
            output->y = relation->y - mode_height (output->mode_info, output->rotation);
            break;
          case below:
            output->x = relation->x;
            output->y = relation->y + mode_height (relation->mode_info, relation->rotation);
            break;
          case same_as:
            output->x = relation->x;
            output->y = relation->y;
          }
          output->changes |= changes_position;
          any_set = True;
      }
      if (!keep_going)
          break;
      if (!any_set)
          fatal ("loop in relative position specifications\n");
    }

    /*
     * Now normalize positions so the upper left corner of all outputs is at 0,0
     */
    min_x = 32768;
    min_y = 32768;
    for (output = outputs; output; output = output->next)
    {
      if (output->mode_info == NULL) continue;
      
      if (output->x < min_x) min_x = output->x;
      if (output->y < min_y) min_y = output->y;
    }
    if (min_x || min_y)
    {
      /* move all outputs */
      for (output = outputs; output; output = output->next)
      {
          if (output->mode_info == NULL) continue;

          output->x -= min_x;
          output->y -= min_y;
          output->changes |= changes_position;
      }
    }
}

static void
set_screen_size (void)
{
    output_t      *output;
    Bool    fb_specified = fb_width != 0 && fb_height != 0;
    
    for (output = outputs; output; output = output->next)
    {
      XRRModeInfo *mode_info = output->mode_info;
      int       x, y, w, h;
      
      if (!mode_info) continue;
      
      x = output->x;
      y = output->y;
      w = mode_width (mode_info, output->rotation);
      h = mode_height (mode_info, output->rotation);
      /* make sure output fits in specified size */
      if (fb_specified)
      {
          if (x + w > fb_width || y + h > fb_height)
            fatal ("specified screen %dx%d not large enough for output %s (%dx%d+%d+%d)\n",
                   fb_width, fb_height, output->output.string, w, h, x, y);
      }
      /* fit fb to output */
      else
      {
          if (x + w > fb_width) fb_width = x + w;
          if (y + h > fb_height) fb_height = y + h;
      }
    } 

    if (fb_width > maxWidth || fb_height > maxHeight)
        fatal ("screen cannot be larger than %dx%d (desired size %dx%d)\n",
             maxWidth, maxHeight, fb_width, fb_height);
    if (fb_specified)
    {
      if (fb_width < minWidth || fb_height < minHeight)
          fatal ("screen must be at least %dx%d\n", minWidth, minHeight);
    }
    else
    {
      if (fb_width < minWidth) fb_width = minWidth;
      if (fb_height < minHeight) fb_height = minHeight;
    }
}
    
#endif
    
void
disable_outputs (output_t *outputs)
{
    while (outputs)
    {
      outputs->crtc_info = NULL;
      outputs = outputs->next;
    }
}

/*
 * find the best mapping from output to crtc available
 */
int
pick_crtcs_score (output_t *outputs)
{
    output_t      *output;
    int           best_score;
    int           my_score;
    int           score;
    crtc_t  *best_crtc;
    int           c;
    
    if (!outputs)
      return 0;
    
    output = outputs;
    outputs = outputs->next;
    /*
     * Score with this output disabled
     */
    output->crtc_info = NULL;
    best_score = pick_crtcs_score (outputs);
    if (output->mode_info == NULL)
      return best_score;

    best_crtc = NULL;
    /* 
     * Now score with this output any valid crtc
     */
    for (c = 0; c < output->output_info->ncrtc; c++)
    {
      crtc_t          *crtc;

      crtc = find_crtc_by_xid (output->output_info->crtcs[c]);
      if (!crtc)
          fatal ("cannot find crtc 0x%x\n", output->output_info->crtcs[c]);
      
      /* reset crtc allocation for following outputs */
      disable_outputs (outputs);
      if (!check_crtc_for_output (crtc, output))
          continue;
      
      my_score = 1000;
      /* slight preference for existing connections */
      if (crtc == output->current_crtc_info)
          my_score++;

      output->crtc_info = crtc;
      score = my_score + pick_crtcs_score (outputs);
      if (score > best_score)
      {
          best_crtc = crtc;
          best_score = score;
      }
    }
    /*
     * Reset other outputs based on this one using the best crtc
     */
    if (output->crtc_info != best_crtc)
    {
      output->crtc_info = best_crtc;
      (void) pick_crtcs_score (outputs);
    }
    return best_score;
}

/*
 * Pick crtcs for any changing outputs that don't have one
 */
void
pick_crtcs (void)
{
    output_t      *output;

    /*
     * First try to match up newly enabled outputs with spare crtcs
     */
    for (output = outputs; output; output = output->next)
    {
      if (output->changes && output->mode_info && !output->crtc_info)
      {
          output->crtc_info = find_crtc_for_output (output);
          if (!output->crtc_info)
            break;
      }
    }
    /*
     * Everyone is happy
     */
    if (!output)
      return;
    /*
     * When the simple way fails, see if there is a way
     * to swap crtcs around and make things work
     */
    for (output = outputs; output; output = output->next)
      output->current_crtc_info = output->crtc_info;
    pick_crtcs_score (outputs);
    for (output = outputs; output; output = output->next)
    {
      if (output->mode_info && !output->crtc_info)
          fatal ("cannot find crtc for output %s\n", output->output.string);
      if (!output->changes && output->crtc_info != output->current_crtc_info)
          output->changes |= changes_crtc;
    }
}

int
main (int argc, char **argv)
{
    XRRScreenSize *sizes;
    XRRScreenConfiguration *sc;
    int           nsize;
    int           nrate;
    short         *rates;
    Status  status = RRSetConfigFailed;
    int           rot = -1;
    int           query = 0;
    Rotation      rotation, current_rotation, rotations;
    XEvent  event;
    XRRScreenChangeNotifyEvent *sce;    
    char          *display_name = NULL;
    int           i, j;
    SizeID  current_size;
    short   current_rate;
    float         rate = -1;
    int           size = -1;
    int           dirind = 0;
    Bool    setit = False;
    Bool          version = False;
    int           event_base, error_base;
    int           reflection = 0;
    int           width = 0, height = 0;
    Bool          have_pixel_size = False;
    int           ret = 0;
#if HAS_RANDR_1_2
    output_t      *output = NULL;
    policy_t      policy = clone;
    Bool          setit_1_2 = False;
    Bool          query_1_2 = False;
    Bool    modeit = False;
    Bool    propit = False;
    Bool    query_1 = False;
    int           major, minor;
#endif

    program_name = argv[0];
    if (argc == 1) query = True;
    for (i = 1; i < argc; i++) {
      if (!strcmp ("-display", argv[i]) || !strcmp ("-d", argv[i])) {
          if (++i>=argc) usage ();
          display_name = argv[i];
          continue;
      }
      if (!strcmp("-help", argv[i])) {
          usage();
          continue;
      }
      if (!strcmp ("--verbose", argv[i])) {
          verbose = True;
          continue;
      }
      if (!strcmp ("--dryrun", argv[i])) {
          dryrun = True;
          verbose = True;
          continue;
      }

      if (!strcmp ("-s", argv[i]) || !strcmp ("--size", argv[i])) {
          if (++i>=argc) usage ();
          if (sscanf (argv[i], "%dx%d", &width, &height) == 2)
            have_pixel_size = True;
          else {
            size = atoi (argv[i]);
            if (size < 0) usage();
          }
          setit = True;
          continue;
      }

      if (!strcmp ("-r", argv[i]) ||
          !strcmp ("--rate", argv[i]) ||
          !strcmp ("--refresh", argv[i]))
      {
          if (++i>=argc) usage ();
          if (sscanf (argv[i], "%f", &rate) != 1)
            usage ();
          setit = True;
#if HAS_RANDR_1_2
          if (output)
          {
            output->refresh = rate;
            output->changes |= changes_refresh;
            setit_1_2 = True;
          }
#endif
          continue;
      }

      if (!strcmp ("-v", argv[i]) || !strcmp ("--version", argv[i])) {
          version = True;
          continue;
      }

      if (!strcmp ("-x", argv[i])) {
          reflection |= RR_Reflect_X;
          setit = True;
          continue;
      }
      if (!strcmp ("-y", argv[i])) {
          reflection |= RR_Reflect_Y;
          setit = True;
          continue;
      }
      if (!strcmp ("--screen", argv[i])) {
          if (++i>=argc) usage ();
          screen = atoi (argv[i]);
          if (screen < 0) usage();
          continue;
      }
      if (!strcmp ("-q", argv[i]) || !strcmp ("--query", argv[i])) {
          query = True;
          continue;
      }
      if (!strcmp ("-o", argv[i]) || !strcmp ("--orientation", argv[i])) {
          char *endptr;
          if (++i>=argc) usage ();
          dirind = strtol(argv[i], &endptr, 0);
          if (*endptr != '\0') {
            for (dirind = 0; dirind < 4; dirind++) {
                if (strcmp (direction[dirind], argv[i]) == 0) break;
            }
            if ((dirind < 0) || (dirind > 3))  usage();
          }
          rot = dirind;
          setit = True;
          continue;
      }
#if HAS_RANDR_1_2
      if (!strcmp ("--prop", argv[i]) || !strcmp ("--properties", argv[i]))
      {
          query_1_2 = True;
          properties = True;
          continue;
      }
      if (!strcmp ("--output", argv[i])) {
          if (++i >= argc) usage();
          output = add_output ();

          set_name (&output->output, argv[i], name_string|name_xid);
          
          setit_1_2 = True;
          continue;
      }
      if (!strcmp ("--crtc", argv[i])) {
          if (++i >= argc) usage();
          if (!output) usage();
          set_name (&output->crtc, argv[i], name_xid|name_index);
          output->changes |= changes_crtc;
          continue;
      }
      if (!strcmp ("--mode", argv[i])) {
          if (++i >= argc) usage();
          if (!output) usage();
          set_name (&output->mode, argv[i], name_string|name_xid);
          output->changes |= changes_mode;
          continue;
      }
      if (!strcmp ("--preferred", argv[i])) {
          if (!output) usage();
          set_name_preferred (&output->mode);
          output->changes |= changes_mode;
          continue;
      }
      if (!strcmp ("--pos", argv[i])) {
          if (++i>=argc) usage ();
          if (!output) usage();
          if (sscanf (argv[i], "%dx%d",
                  &output->x, &output->y) != 2)
            usage ();
          output->changes |= changes_position;
          continue;
      }
      if (!strcmp ("--rotation", argv[i]) || !strcmp ("--rotate", argv[i])) {
          if (++i>=argc) usage ();
          if (!output) usage();
          for (dirind = 0; dirind < 4; dirind++) {
            if (strcmp (direction[dirind], argv[i]) == 0) break;
          }
          if (dirind == 4)
            usage ();
          output->rotation &= ~0xf;
          output->rotation |= 1 << dirind;
          output->changes |= changes_rotation;
          continue;
      }
      if (!strcmp ("--reflect", argv[i]) || !strcmp ("--reflection", argv[i])) {
          if (++i>=argc) usage ();
          if (!output) usage();
          for (dirind = 0; dirind < 4; dirind++) {
            if (strcmp (reflections[dirind], argv[i]) == 0) break;
          }
          if (dirind == 4)
            usage ();
          output->rotation &= ~(RR_Reflect_X|RR_Reflect_Y);
          output->rotation |= dirind * RR_Reflect_X;
          output->changes |= changes_reflection;
          continue;
      }
      if (!strcmp ("--left-of", argv[i])) {
          if (++i>=argc) usage ();
          if (!output) usage();
          output->relation = left_of;
          output->relative_to = argv[i];
          output->changes |= changes_relation;
          continue;
      }
      if (!strcmp ("--right-of", argv[i])) {
          if (++i>=argc) usage ();
          if (!output) usage();
          output->relation = right_of;
          output->relative_to = argv[i];
          output->changes |= changes_relation;
          continue;
      }
      if (!strcmp ("--above", argv[i])) {
          if (++i>=argc) usage ();
          if (!output) usage();
          output->relation = above;
          output->relative_to = argv[i];
          output->changes |= changes_relation;
          continue;
      }
      if (!strcmp ("--below", argv[i])) {
          if (++i>=argc) usage ();
          if (!output) usage();
          output->relation = below;
          output->relative_to = argv[i];
          output->changes |= changes_relation;
          continue;
      }
      if (!strcmp ("--same-as", argv[i])) {
          if (++i>=argc) usage ();
          if (!output) usage();
          output->relation = same_as;
          output->relative_to = argv[i];
          output->changes |= changes_relation;
          continue;
      }
      if (!strcmp ("--set", argv[i])) {
          output_prop_t   *prop;
          if (!output) usage();
          prop = malloc (sizeof (output_prop_t));
          prop->next = output->props;
          output->props = prop;
          if (++i>=argc) usage ();
          prop->name = argv[i];
          if (++i>=argc) usage ();
          prop->value = argv[i];
          propit = True;
          output->changes |= changes_property;
          setit_1_2 = True;
          continue;
      }
      if (!strcmp ("--off", argv[i])) {
          if (!output) usage();
          set_name_xid (&output->mode, None);
          set_name_xid (&output->crtc, None);
          output->changes |= changes_mode;
          continue;
      }
      if (!strcmp ("--fb", argv[i])) {
          if (++i>=argc) usage ();
          if (sscanf (argv[i], "%dx%d",
                  &fb_width, &fb_height) != 2)
            usage ();
          setit_1_2 = True;
          continue;
      }
      if (!strcmp ("--fbmm", argv[i])) {
          if (++i>=argc) usage ();
          if (sscanf (argv[i], "%dx%d",
                  &fb_width_mm, &fb_height_mm) != 2)
            usage ();
          setit_1_2 = True;
          continue;
      }
      if (!strcmp ("--dpi", argv[i])) {
          if (++i>=argc) usage ();
          if (sscanf (argv[i], "%f", &dpi) != 1)
          {
            dpi = 0.0;
            dpi_output = argv[i];
          }
          setit_1_2 = True;
          continue;
      }
      if (!strcmp ("--clone", argv[i])) {
          policy = clone;
          setit_1_2 = True;
          continue;
      }
      if (!strcmp ("--extend", argv[i])) {
          policy = extend;
          setit_1_2 = True;
          continue;
      }
      if (!strcmp ("--auto", argv[i])) {
          if (output)
          {
            output->automatic = True;
            output->changes |= changes_automatic;
          }
          else
            automatic = True;
          setit_1_2 = True;
          continue;
      }
      if (!strcmp ("--q12", argv[i]))
      {
          query_1_2 = True;
          continue;
      }
      if (!strcmp ("--q1", argv[i]))
      {
          query_1 = True;
          continue;
      }
      if (!strcmp ("--newmode", argv[i]))
      {
          umode_t  *m = malloc (sizeof (umode_t));
          float   clock;
          
          ++i;
          if (i + 9 >= argc) usage ();
          m->mode.name = argv[i];
          m->mode.nameLength = strlen (argv[i]);
          i++;
          if (sscanf (argv[i++], "%f", &clock) != 1)
            usage ();
          m->mode.dotClock = clock * 1e6;

          if (sscanf (argv[i++], "%d", &m->mode.width) != 1) usage();
          if (sscanf (argv[i++], "%d", &m->mode.hSyncStart) != 1) usage();
          if (sscanf (argv[i++], "%d", &m->mode.hSyncEnd) != 1) usage();
          if (sscanf (argv[i++], "%d", &m->mode.hTotal) != 1) usage();
          if (sscanf (argv[i++], "%d", &m->mode.height) != 1) usage();
          if (sscanf (argv[i++], "%d", &m->mode.vSyncStart) != 1) usage();
          if (sscanf (argv[i++], "%d", &m->mode.vSyncEnd) != 1) usage();
          if (sscanf (argv[i++], "%d", &m->mode.vTotal) != 1) usage();
          m->mode.modeFlags = 0;
          while (i < argc) {
            int f;
            
            for (f = 0; mode_flags[f].string; f++)
                if (!strcasecmp (mode_flags[f].string, argv[i]))
                  break;
            
            if (!mode_flags[f].string)
                break;
            m->mode.modeFlags |= mode_flags[f].flag;
            i++;
          }
          m->next = umodes;
          m->action = umode_create;
          umodes = m;
          modeit = True;
          continue;
      }
      if (!strcmp ("--rmmode", argv[i]))
      {
          umode_t  *m = malloc (sizeof (umode_t));

          if (++i>=argc) usage ();
          set_name (&m->name, argv[i], name_string|name_xid);
          m->action = umode_destroy;
          m->next = umodes;
          umodes = m;
          modeit = True;
          continue;
      }
      if (!strcmp ("--addmode", argv[i]))
      {
          umode_t  *m = malloc (sizeof (umode_t));

          if (++i>=argc) usage ();
          set_name (&m->output, argv[i], name_string|name_xid);
          if (++i>=argc) usage();
          set_name (&m->name, argv[i], name_string|name_xid);
          m->action = umode_add;
          m->next = umodes;
          umodes = m;
          modeit = True;
          continue;
      }
      if (!strcmp ("--delmode", argv[i]))
      {
          umode_t  *m = malloc (sizeof (umode_t));

          if (++i>=argc) usage ();
          set_name (&m->output, argv[i], name_string|name_xid);
          if (++i>=argc) usage();
          set_name (&m->name, argv[i], name_string|name_xid);
          m->action = umode_delete;
          m->next = umodes;
          umodes = m;
          modeit = True;
          continue;
      }
#endif
      usage();
    }
    if (verbose) 
    {
      query = True;
      if (setit && !setit_1_2)
          query_1 = True;
    }

    dpy = XOpenDisplay (display_name);

    if (dpy == NULL) {
      fprintf (stderr, "Can't open display %s\n", XDisplayName(display_name));
      exit (1);
    }
    if (screen < 0)
      screen = DefaultScreen (dpy);
    if (screen >= ScreenCount (dpy)) {
      fprintf (stderr, "Invalid screen number %d (display has %d)\n",
             screen, ScreenCount (dpy));
      exit (1);
    }

    root = RootWindow (dpy, screen);

#if HAS_RANDR_1_2
    if (!XRRQueryVersion (dpy, &major, &minor))
    {
      fprintf (stderr, "RandR extension missing\n");
      exit (1);
    }
    if (major > 1 || (major == 1 && minor >= 2))
      has_1_2 = True;
      
    if (has_1_2 && modeit)
    {
      umode_t     *m;

        get_screen ();
      get_crtcs();
      get_outputs();
      
      for (m = umodes; m; m = m->next)
      {
          XRRModeInfo *e;
          output_t      *o;
          
          switch (m->action) {
          case umode_create:
            XRRCreateMode (dpy, root, &m->mode);
            break;
          case umode_destroy:
            e = find_mode (&m->name, 0);
            if (!e)
                fatal ("cannot find mode \"%s\"\n", m->name.string);
            XRRDestroyMode (dpy, e->id);
            break;
          case umode_add:
            o = find_output (&m->output);
            if (!o)
                fatal ("cannot find output \"%s\"\n", m->output.string);
            e = find_mode (&m->name, 0);
            if (!e)
                fatal ("cannot find mode \"%s\"\n", m->name.string);
            XRRAddOutputMode (dpy, o->output.xid, e->id);
            break;
          case umode_delete:
            o = find_output (&m->output);
            if (!o)
                fatal ("cannot find output \"%s\"\n", m->output.string);
            e = find_mode (&m->name, 0);
            if (!e)
                fatal ("cannot find mode \"%s\"\n", m->name.string);
            XRRDeleteOutputMode (dpy, o->output.xid, e->id);
            break;
          }
      }
      if (!setit_1_2)
      {
          XSync (dpy, False);
          exit (0);
      }
    }
    if (has_1_2 && propit)
    {
      
        get_screen ();
      get_crtcs();
      get_outputs();
      
      for (output = outputs; output; output = output->next)
      {
          output_prop_t   *prop;

          for (prop = output->props; prop; prop = prop->next)
          {
            Atom        name = XInternAtom (dpy, prop->name, False);
            Atom        type;
            int         format;
            unsigned char     *data;
            int         nelements;
            int         int_value;
            unsigned long     ulong_value;
            unsigned char     *prop_data;
            int         actual_format;
            unsigned long     nitems, bytes_after;
            Atom        actual_type;
            XRRPropertyInfo *propinfo;

            type = AnyPropertyType;
            format=0;
            
            if (XRRGetOutputProperty (dpy, output->output.xid, name,
                                0, 100, False, False,
                                AnyPropertyType,
                                &actual_type, &actual_format,
                                &nitems, &bytes_after, &prop_data) == Success &&

                (propinfo = XRRQueryOutputProperty(dpy, output->output.xid,
                                          name)))
            {
                type = actual_type;
                format = actual_format;
            }
            
            if ((type == XA_INTEGER || type == AnyPropertyType) &&
                (sscanf (prop->value, "%d", &int_value) == 1 ||
                 sscanf (prop->value, "0x%x", &int_value) == 1))
            {
                type = XA_INTEGER;
                ulong_value = int_value;
                data = (unsigned char *) &ulong_value;
                nelements = 1;
                format = 32;
            }
            else if ((type == XA_ATOM))
            {
                ulong_value = XInternAtom (dpy, prop->value, False);
                data = (unsigned char *) &ulong_value;
                nelements = 1;
                format = 32;
            }
            else if ((type == XA_STRING || type == AnyPropertyType))
            {
                type = XA_STRING;
                data = (unsigned char *) prop->value;
                nelements = strlen (prop->value);
                format = 8;
            }
            XRRChangeOutputProperty (dpy, output->output.xid,
                               name, type, format, PropModeReplace,
                               data, nelements);
          }
      }
      if (!setit_1_2)
      {
          XSync (dpy, False);
          exit (0);
      }
    }
    if (setit_1_2)
    {
      get_screen ();
      get_crtcs ();
      get_outputs ();
      set_positions ();
      set_screen_size ();

      pick_crtcs ();

      /*
       * Assign outputs to crtcs
       */
      set_crtcs ();
      
      /*
       * Mark changing crtcs
       */
      mark_changing_crtcs ();

      /*
       * If an output was specified to track dpi, use it
       */
      if (dpi_output)
      {
          output_t      *output = find_output_by_name (dpi_output);
          XRROutputInfo *output_info;
          XRRModeInfo   *mode_info;
          if (!output)
            fatal ("Cannot find output %s\n", dpi_output);
          output_info = output->output_info;
          mode_info = output->mode_info;
          if (output_info && mode_info && output_info->mm_height)
          {
            /*
             * When this output covers the whole screen, just use
             * the known physical size
             */
            if (fb_width == mode_info->width &&
                fb_height == mode_info->height)
            {
                fb_width_mm = output_info->mm_width;
                fb_height_mm = output_info->mm_height;
            }
            else
            {
                dpi = (25.4 * mode_info->height) / output_info->mm_height;
            }
          }
      }

      /*
       * Compute physical screen size
       */
      if (fb_width_mm == 0 || fb_height_mm == 0)
      {
          if (fb_width != DisplayWidth (dpy, screen) ||
            fb_height != DisplayHeight (dpy, screen) || dpi != 0.0)
          {
            if (dpi <= 0)
                dpi = (25.4 * DisplayHeight (dpy, screen)) / DisplayHeightMM(dpy, screen);

            fb_width_mm = (25.4 * fb_width) / dpi;
            fb_height_mm = (25.4 * fb_height) / dpi;
          }
          else
          {
            fb_width_mm = DisplayWidthMM (dpy, screen);
            fb_height_mm = DisplayHeightMM (dpy, screen);
          }
      }
      
      /*
       * Now apply all of the changes
       */
      apply ();
      
      XSync (dpy, False);
      exit (0);
    }
    if (query_1_2 || (query && has_1_2 && !query_1))
    {
      output_t    *output;
      int       m;
      
#define ModeShown   0x80000000
      
      get_screen ();
      get_crtcs ();
      get_outputs ();

        printf ("Screen %d: minimum %d x %d, current %d x %d, maximum %d x %d\n",
            screen, minWidth, minHeight,
            DisplayWidth (dpy, screen), DisplayHeight(dpy, screen),
            maxWidth, maxHeight);

      for (output = outputs; output; output = output->next)
      {
          XRROutputInfo   *output_info = output->output_info;
          XRRModeInfo       *mode = output->mode_info;
          Atom        *props;
          int               j, k, nprop;
          Bool        *mode_shown;
          Rotation          rotations = output_rotations (output);

          printf ("%s %s", output_info->name, connection[output_info->connection]);
          if (mode)
          {
            printf (" %dx%d+%d+%d",
                  mode_width (mode, output->rotation),
                  mode_height (mode, output->rotation),
                  output->x, output->y);
            if (verbose)
                printf (" (0x%x)", mode->id);
            if (output->rotation != RR_Rotate_0 || verbose)
            {
                printf (" %s", 
                      rotation_name (output->rotation));
                if (output->rotation & (RR_Reflect_X|RR_Reflect_Y))
                  printf (" %s", reflection_name (output->rotation));
            }
          }
          if (rotations != RR_Rotate_0 || verbose)
          {
            Bool    first = True;
            printf (" (");
            for (i = 0; i < 4; i ++) {
                if ((rotations >> i) & 1) {
                  if (!first) printf (" "); first = False;
                  printf("%s", direction[i]);
                  first = False;
                }
            }
            if (rotations & RR_Reflect_X)
            {
                if (!first) printf (" "); first = False;
                printf ("x axis");
            }
            if (rotations & RR_Reflect_Y)
            {
                if (!first) printf (" "); first = False;
                printf ("y axis");
            }
            printf (")");
          }

          if (mode)
          {
            printf (" %dmm x %dmm",
                  output_info->mm_width, output_info->mm_height);
          }
          printf ("\n");

          if (verbose)
          {
            printf ("\tIdentifier: 0x%x\n", output->output.xid);
            printf ("\tTimestamp:  %d\n", output_info->timestamp);
            printf ("\tSubpixel:   %s\n", order[output_info->subpixel_order]);
            printf ("\tClones:    ");
            for (j = 0; j < output_info->nclone; j++)
            {
                output_t      *clone = find_output_by_xid (output_info->clones[j]);

                if (clone) printf (" %s", clone->output.string);
            }
            printf ("\n");
            if (output->crtc_info)
                printf ("\tCRTC:       %d\n", output->crtc_info->crtc.index);
            printf ("\tCRTCs:     ");
            for (j = 0; j < output_info->ncrtc; j++)
            {
                crtc_t  *crtc = find_crtc_by_xid (output_info->crtcs[j]);
                if (crtc)
                  printf (" %d", crtc->crtc.index);
            }
            printf ("\n");
          }
          if (verbose || properties)
          {
            props = XRRListOutputProperties (dpy, output->output.xid,
                                     &nprop);
            for (j = 0; j < nprop; j++) {
                unsigned char *prop;
                int actual_format;
                unsigned long nitems, bytes_after;
                Atom actual_type;
                XRRPropertyInfo *propinfo;
    
                XRRGetOutputProperty (dpy, output->output.xid, props[j],
                                0, 100, False, False,
                                AnyPropertyType,
                                &actual_type, &actual_format,
                                &nitems, &bytes_after, &prop);

                propinfo = XRRQueryOutputProperty(dpy, output->output.xid,
                                          props[j]);

                if (actual_type == XA_INTEGER && actual_format == 8) {
                  int k;
    
                  printf("\t%s:\n", XGetAtomName (dpy, props[j]));
                  for (k = 0; k < nitems; k++) {
                      if (k % 16 == 0)
                        printf ("\t\t");
                      printf("%02x", (unsigned char)prop[k]);
                      if (k % 16 == 15)
                        printf("\n");
                  }
                } else if (actual_type == XA_INTEGER &&
                         actual_format == 32)
                {
                  printf("\t%s: %d (0x%08x)",
                         XGetAtomName (dpy, props[j]),
                         *(INT32 *)prop, *(INT32 *)prop);

                  if (propinfo->range && propinfo->num_values > 0) {
                      printf(" range%s: ",
                           (propinfo->num_values == 2) ? "" : "s");

                      for (k = 0; k < propinfo->num_values / 2; k++)
                        printf(" (%d,%d)", propinfo->values[k * 2],
                               propinfo->values[k * 2 + 1]);
                  }

                  printf("\n");
                } else if (actual_type == XA_ATOM &&
                         actual_format == 32)
                {
                  printf("\t%s: %s",
                         XGetAtomName (dpy, props[j]),
                         XGetAtomName (dpy, *(Atom *)prop));

                  if (!propinfo->range && propinfo->num_values > 0) {
                      printf("\n\t\tsupported:");

                      for (k = 0; k < propinfo->num_values; k++)
                      {
                        printf(" %-12.12s", XGetAtomName (dpy,
                                              propinfo->values[k]));
                        if (k % 4 == 3 && k < propinfo->num_values - 1)
                            printf ("\n\t\t          ");
                      }
                  }
                  printf("\n");
                  
                } else if (actual_format == 8) {
                  printf ("\t\t%s: %s%s\n", XGetAtomName (dpy, props[j]),
                        prop, bytes_after ? "..." : "");
                } else {
                  printf ("\t\t%s: ????\n", XGetAtomName (dpy, props[j]));
                }

                free(propinfo);
            }
          }
          
          if (verbose)
          {
            for (j = 0; j < output_info->nmode; j++)
            {
                XRRModeInfo   *mode = find_mode_by_xid (output_info->modes[j]);
                int           f;
                
                printf ("  %s (0x%x) %6.1fMHz",
                      mode->name, mode->id,
                      (float)mode->dotClock / 1000000.0);
                for (f = 0; mode_flags[f].flag; f++)
                  if (mode->modeFlags & mode_flags[f].flag)
                      printf (" %s", mode_flags[f].string);
                printf ("\n");
                printf ("        h: width  %4d start %4d end %4d total %4d skew %4d clock %6.1fKHz\n",
                      mode->width, mode->hSyncStart, mode->hSyncEnd,
                      mode->hTotal, mode->hSkew, mode_hsync (mode) / 1000);
                printf ("        v: height %4d start %4d end %4d total %4d           clock %6.1fHz\n",
                      mode->height, mode->vSyncStart, mode->vSyncEnd, mode->vTotal,
                      mode_refresh (mode));
                mode->modeFlags |= ModeShown;
            }
          }
          else
          {
            mode_shown = calloc (output_info->nmode, sizeof (Bool));
            if (!mode_shown) fatal ("out of memory\n");
            for (j = 0; j < output_info->nmode; j++)
            {
                XRRModeInfo *jmode, *kmode;
                
                if (mode_shown[j]) continue;
    
                jmode = find_mode_by_xid (output_info->modes[j]);
                printf (" ");
                printf ("  %-12s", jmode->name);
                for (k = j; k < output_info->nmode; k++)
                {
                  if (mode_shown[k]) continue;
                  kmode = find_mode_by_xid (output_info->modes[k]);
                  if (strcmp (jmode->name, kmode->name) != 0) continue;
                  mode_shown[k] = True;
                  kmode->modeFlags |= ModeShown;
                  printf (" %6.1f", mode_refresh (kmode));
                  if (kmode == output->mode_info)
                      printf ("*");
                  else
                      printf (" ");
                  if (k < output_info->npreferred)
                      printf ("+");
                  else
                      printf (" ");
                }
                printf ("\n");
            }
            free (mode_shown);
          }
      }
      for (m = 0; m < res->nmode; m++)
      {
          XRRModeInfo   *mode = &res->modes[m];

          if (!(mode->modeFlags & ModeShown))
          {
            printf ("  %s (0x%x) %6.1fMHz\n",
                  mode->name, mode->id,
                  (float)mode->dotClock / 1000000.0);
            printf ("        h: width  %4d start %4d end %4d total %4d skew %4d clock %6.1fKHz\n",
                  mode->width, mode->hSyncStart, mode->hSyncEnd,
                  mode->hTotal, mode->hSkew, mode_hsync (mode) / 1000);
            printf ("        v: height %4d start %4d end %4d total %4d           clock %6.1fHz\n",
                  mode->height, mode->vSyncStart, mode->vSyncEnd, mode->vTotal,
                  mode_refresh (mode));
          }
      }
      exit (0);
    }
#endif
    
    sc = XRRGetScreenInfo (dpy, root);

    if (sc == NULL) 
      exit (1);

    current_size = XRRConfigCurrentConfiguration (sc, &current_rotation);

    sizes = XRRConfigSizes(sc, &nsize);

    if (have_pixel_size) {
      for (size = 0; size < nsize; size++)
      {
          if (sizes[size].width == width && sizes[size].height == height)
            break;
      }
      if (size >= nsize) {
          fprintf (stderr,
                 "Size %dx%d not found in available modes\n", width, height);
          exit (1);
      }
    }
    else if (size < 0)
      size = current_size;
    else if (size >= nsize) {
      fprintf (stderr,
             "Size index %d is too large, there are only %d sizes\n",
             size, nsize);
      exit (1);
    }

    if (rot < 0)
    {
      for (rot = 0; rot < 4; rot++)
          if (1 << rot == (current_rotation & 0xf))
            break;
    }

    current_rate = XRRConfigCurrentRate (sc);

    if (rate < 0)
    {
      if (size == current_size)
          rate = current_rate;
      else
          rate = 0;
    }
    else
    {
      rates = XRRConfigRates (sc, size, &nrate);
      for (i = 0; i < nrate; i++)
          if (rate == rates[i])
            break;
      if (i == nrate) {
          fprintf (stderr, "Rate %.1f Hz not available for this size\n", rate);
          exit (1);
      }
    }

    if (version) {
      int major_version, minor_version;
      XRRQueryVersion (dpy, &major_version, &minor_version);
      printf("Server reports RandR version %d.%d\n", 
             major_version, minor_version);
    }

    if (query || query_1) {
      printf(" SZ:    Pixels          Physical       Refresh\n");
      for (i = 0; i < nsize; i++) {
          printf ("%c%-2d %5d x %-5d  (%4dmm x%4dmm )",
                i == current_size ? '*' : ' ',
                i, sizes[i].width, sizes[i].height,
                sizes[i].mwidth, sizes[i].mheight);
          rates = XRRConfigRates (sc, i, &nrate);
          if (nrate) printf ("  ");
          for (j = 0; j < nrate; j++)
            printf ("%c%-4d",
                  i == current_size && rates[j] == current_rate ? '*' : ' ',
                  rates[j]);
          printf ("\n");
      }
    }

    rotations = XRRConfigRotations(sc, &current_rotation);

    rotation = 1 << rot ;
    if (query) {
      printf("Current rotation - %s\n",
             rotation_name (current_rotation));

      printf("Current reflection - %s\n",
             reflection_name (current_rotation));

      printf ("Rotations possible - ");
      for (i = 0; i < 4; i ++) {
          if ((rotations >> i) & 1)  printf("%s ", direction[i]);
      }
      printf ("\n");

      printf ("Reflections possible - ");
      if (rotations & (RR_Reflect_X|RR_Reflect_Y))
      {
          if (rotations & RR_Reflect_X) printf ("X Axis ");
          if (rotations & RR_Reflect_Y) printf ("Y Axis");
      }
      else
          printf ("none");
      printf ("\n");
    }

    if (verbose) { 
      printf("Setting size to %d, rotation to %s\n",  size, direction[rot]);

      printf ("Setting reflection on ");
      if (reflection)
      {
          if (reflection & RR_Reflect_X) printf ("X Axis ");
          if (reflection & RR_Reflect_Y) printf ("Y Axis");
      }
      else
          printf ("neither axis");
      printf ("\n");

      if (reflection & RR_Reflect_X) printf("Setting reflection on X axis\n");

      if (reflection & RR_Reflect_Y) printf("Setting reflection on Y axis\n");
    }

    /* we should test configureNotify on the root window */
    XSelectInput (dpy, root, StructureNotifyMask);

    if (setit && !dryrun) XRRSelectInput (dpy, root,
                         RRScreenChangeNotifyMask);
    if (setit && !dryrun) status = XRRSetScreenConfigAndRate (dpy, sc,
                                       DefaultRootWindow (dpy), 
                                       (SizeID) size, (Rotation) (rotation | reflection), rate, CurrentTime);

    XRRQueryExtension(dpy, &event_base, &error_base);

    if (setit && !dryrun && status == RRSetConfigFailed) {
      printf ("Failed to change the screen configuration!\n");
      ret = 1;
    }

    if (verbose && setit && !dryrun && size != current_size) {
      if (status == RRSetConfigSuccess)
      {
          Bool    seen_screen = False;
          while (!seen_screen) {
            int spo;
            XNextEvent(dpy, (XEvent *) &event);

            printf ("Event received, type = %d\n", event.type);
            /* update Xlib's knowledge of the event */
            XRRUpdateConfiguration (&event);
            if (event.type == ConfigureNotify)
                printf("Received ConfigureNotify Event!\n");

            switch (event.type - event_base) {
            case RRScreenChangeNotify:
                sce = (XRRScreenChangeNotifyEvent *) &event;

                printf("Got a screen change notify event!\n");
                printf(" window = %d\n root = %d\n size_index = %d\n rotation %d\n", 
                     (int) sce->window, (int) sce->root, 
                     sce->size_index,  sce->rotation);
                printf(" timestamp = %ld, config_timestamp = %ld\n",
                     sce->timestamp, sce->config_timestamp);
                printf(" Rotation = %x\n", sce->rotation);
                printf(" %d X %d pixels, %d X %d mm\n",
                     sce->width, sce->height, sce->mwidth, sce->mheight);
                printf("Display width   %d, height   %d\n",
                     DisplayWidth(dpy, screen), DisplayHeight(dpy, screen));
                printf("Display widthmm %d, heightmm %d\n", 
                     DisplayWidthMM(dpy, screen), DisplayHeightMM(dpy, screen));
                spo = sce->subpixel_order;
                if ((spo < 0) || (spo > 5))
                  printf ("Unknown subpixel order, value = %d\n", spo);
                else printf ("new Subpixel rendering model is %s\n", order[spo]);
                seen_screen = True;
                break;
            default:
                if (event.type != ConfigureNotify) 
                  printf("unknown event received, type = %d!\n", event.type);
            }
          }
      }
    }
    XRRFreeScreenConfigInfo(sc);
    return(ret);
}

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