xrandr source « Big O(random)

xrandr source

http://www.thinkwiki.org/wiki/Xorg_RandR_1.2#Using_xrandr_to_do_useful_things

/*
* Copyright Â© 2001 Keith Packard, member of The XFree86 Project, Inc.
* Copyright Â© 2002 Hewlett Packard Company, Inc.
* Copyright Â© 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>

#include "config.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 Bool grab_server = True;
static Bool no_primary = 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");
fprintf(stderr, " –nograb\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, " –scale <x>x<y>\n");
fprintf(stderr, " –transform <a>,<b>,<c>,<d>,<e>,<f>,<g>,<h>,<i>\n");
fprintf(stderr, " –off\n");
fprintf(stderr, " –crtc <crtc>\n");
fprintf(stderr, " –panning <w>x<h>[+<x>+<y>[/<track:w>x<h>+<x>+<y>[/<border:l>/<t>/<r>/<b>]]]\n");
fprintf(stderr, " –gamma <r>:<g>:<b>\n");
fprintf(stderr, " –primary\n");
fprintf(stderr, " –noprimary\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 void
warning (const char *format, …)
{
va_list ap;

va_start (ap, format);
fprintf (stderr, "%s: ", program_name);
vfprintf (stderr, format, ap);
va_end (ap);
}

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 struct {
int x, y, width, height;
} rectangle_t;

typedef struct {
int x1, y1, x2, y2;
} box_t;

typedef struct {
int x, y;
} point_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_transform = (1 << 9),
changes_panning = (1 << 10),
changes_gamma = (1 << 11),
changes_primary = (1 << 12),
} 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 _transform transform_t;
typedef struct _umode umode_t;
typedef struct _output_prop output_prop_t;

struct _transform {
XTransform transform;
char *filter;
int nparams;
XFixed *params;
};

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

XRRModeInfo *mode_info;
XRRPanning *panning_info;
int x;
int y;
Rotation rotation;
output_t **outputs;
int noutput;
transform_t current_transform, pending_transform;
};

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;
double refresh;
XRRModeInfo *mode_info;

name_t addmode;

relation_t relation;
char *relative_to;

int x, y;
Rotation rotation;

XRRPanning panning;

Bool automatic;
transform_t transform;

struct {
float red;
float green;
float blue;
} gamma;

Bool primary;

Bool found;
};

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 0×40000000

#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 double dpi = 0;
static char *dpi_output = NULL;
static Bool dryrun = False;
static int minWidth, maxWidth, minHeight, maxHeight;
static Bool has_1_2 = False;
static Bool has_1_3 = 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;
}
}

static Bool
transform_point (XTransform *transform, double *xp, double *yp)
{
double vector[3];
double result[3];
int i, j;
double v;

vector[0] = *xp;
vector[1] = *yp;
vector[2] = 1;
for (j = 0; j < 3; j++)
{
v = 0;
for (i = 0; i < 3; i++)
v += (XFixedToDouble (transform->matrix[j][i]) * vector[i]);
if (v > 32767 || v < -32767)
return False;
result[j] = v;
}
if (!result[2])
return False;
for (j = 0; j < 2; j++)
vector[j] = result[j] / result[2];
*xp = vector[0];
*yp = vector[1];
return True;
}

static void
path_bounds (XTransform *transform, point_t *points, int npoints, box_t *box)
{
int i;
box_t point;

for (i = 0; i < npoints; i++) {
double x, y;
x = points[i].x;
y = points[i].y;
transform_point (transform, &x, &y);
point.x1 = floor (x);
point.y1 = floor (y);
point.x2 = ceil (x);
point.y2 = ceil (y);
if (i == 0)
*box = point;
else {
if (point.x1 < box->x1) box->x1 = point.x1;
if (point.y1 < box->y1) box->y1 = point.y1;
if (point.x2 > box->x2) box->x2 = point.x2;
if (point.y2 > box->y2) box->y2 = point.y2;
}
}
}

static void
mode_geometry (XRRModeInfo *mode_info, Rotation rotation,
XTransform *transform,
box_t *bounds)
{
point_t rect[4];
int width = mode_width (mode_info, rotation);
int height = mode_height (mode_info, rotation);

rect[0].x = 0;
rect[0].y = 0;
rect[1].x = width;
rect[1].y = 0;
rect[2].x = width;
rect[2].y = height;
rect[3].x = 0;
rect[3].y = height;
path_bounds (transform, rect, 4, bounds);
}

/* v refresh frequency in Hz */
static double
mode_refresh (XRRModeInfo *mode_info)
{
double rate;

if (mode_info->hTotal && mode_info->vTotal)
rate = ((double) mode_info->dotClock /
((double) mode_info->hTotal * (double) mode_info->vTotal));
else
rate = 0;
return rate;
}

/* h sync frequency in Hz */
static double
mode_hsync (XRRModeInfo *mode_info)
{
double rate;

if (mode_info->hTotal)
rate = (double) mode_info->dotClock / (double) 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)
{
unsigned int xid; /* don’t make it XID (which is unsigned long):
scanf() takes unsigned int */
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 void
init_transform (transform_t *transform)
{
int x;
memset (&transform->transform, ‘\0‘, sizeof (transform->transform));
for (x = 0; x < 3; x++)
transform->transform.matrix[x][x] = XDoubleToFixed (1.0);
transform->filter = "";
transform->nparams = 0;
transform->params = NULL;
}

static void
set_transform (transform_t *dest,
XTransform *transform,
char *filter,
XFixed *params,
int nparams)
{
dest->transform = *transform;
dest->filter = strdup (filter);
dest->nparams = nparams;
dest->params = malloc (nparams * sizeof (XFixed));
memcpy (dest->params, params, nparams * sizeof (XFixed));
}

static void
copy_transform (transform_t *dest, transform_t *src)
{
set_transform (dest, &src->transform,
src->filter, src->params, src->nparams);
}

static Bool
equal_transform (transform_t *a, transform_t *b)
{
if (memcmp (&a->transform, &b->transform, sizeof (XTransform)) != 0)
return False;
if (strcmp (a->filter, b->filter) != 0)
return False;
if (a->nparams != b->nparams)
return False;
if (memcmp (a->params, b->params, a->nparams * sizeof (XFixed)) != 0)
return False;
return True;
}

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

if (!output)
fatal ("out of memory\n");
output->next = NULL;
output->found = False;
*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, double refresh)
{
int m;
XRRModeInfo *best = NULL;
double 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))
{
double 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);
}

#if 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);
}
#endif

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

/* Stay away from doublescan modes unless refresh rate is specified. */
if (!output->refresh && (mode->modeFlags & RR_DoubleScan))
continue;

if (output->refresh)
   dist = fabs (mode_refresh (mode) – output->refresh);
else
   dist = 0;
if (!best || dist < bestDist)
{
   bestDist = dist;
   best = mode;
}
}
}
return best;
}

static 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;
}

#if 0
static Bool
crtc_can_use_transform (crtc_t *crtc, XTransform *transform)
{
int major, minor;

XRRQueryVersion (dpy, &major, &minor);
if (major > 1 || (major == 1 && minor >= 3))
return True;
return False;
}
#endif

/*
* 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 Bool
output_is_primary(output_t *output)
{
if (has_1_3)
return XRRGetOutputPrimary(dpy, root) == output->output.xid;
return False;
}

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)
warning ("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));

/* set transformation */
if (!(output->changes & changes_transform))
{
if (output->crtc_info)
copy_transform (&output->transform, &output->crtc_info->current_transform);
else
init_transform (&output->transform);
}

/* set primary */
if (!(output->changes & changes_primary))
output->primary = output_is_primary(output);
}

static void
get_screen (Bool current)
{
if (!has_1_2)
fatal ("Server RandR version before 1.2\n");

XRRGetScreenSizeRange (dpy, root, &minWidth, &minHeight,
&maxWidth, &maxHeight);

if (current)
res = XRRGetScreenResourcesCurrent (dpy, root);
else
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\n");

for (c = 0; c < res->ncrtc; c++)
{
XRRCrtcInfo *crtc_info = XRRGetCrtcInfo (dpy, res, res->crtcs[c]);
#if RANDR_MAJOR > 1 || RANDR_MINOR >= 3
XRRCrtcTransformAttributes *attr;
#endif
XRRPanning *panning_info = NULL;

if (has_1_3) {
XRRPanning zero;
memset(&zero, 0, sizeof(zero));
panning_info = XRRGetPanning (dpy, res, res->crtcs[c]);
zero.timestamp = panning_info->timestamp;
if (!memcmp(panning_info, &zero, sizeof(zero))) {
Xfree(panning_info);
panning_info = NULL;
}
}

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\n", res->crtcs[c]);
crtcs[c].crtc_info = crtc_info;
crtcs[c].panning_info = panning_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;
}
#if RANDR_MAJOR > 1 || RANDR_MINOR >= 3
if (XRRGetCrtcTransform (dpy, res->crtcs[c], &attr) && attr) {
set_transform (&crtcs[c].current_transform,
      &attr->currentTransform,
      attr->currentFilter,
      attr->currentParams,
      attr->currentNparams);
XFree (attr);
}
else
#endif
{
init_transform (&crtcs[c].current_transform);
}
copy_transform (&crtcs[c].pending_transform, &crtcs[c].current_transform);
}
}

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;
copy_transform (&crtc->pending_transform, &output->transform);
}
if (!crtc->outputs) fatal ("out of memory\n");
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 void
set_panning (void)
{
output_t *output;

for (output = outputs; output; output = output->next)
{
if (! output->crtc_info)
continue;
if (! (output->changes & changes_panning))
continue;
if (! output->crtc_info->panning_info)
output->crtc_info->panning_info = malloc (sizeof(XRRPanning));
memcpy (output->crtc_info->panning_info, &output->panning, sizeof(XRRPanning));
output->crtc_info->changing = 1;
}
}

static void
set_gamma(void)
{
output_t *output;

for (output = outputs; output; output = output->next) {
int i, size;
crtc_t *crtc;
XRRCrtcGamma *gamma;

if (!(output->changes & changes_gamma))
continue;

if (!output->crtc_info) {
fatal("Need crtc to set gamma on.\n");
continue;
}

crtc = output->crtc_info;

size = XRRGetCrtcGammaSize(dpy, crtc->crtc.xid);

if (!size) {
fatal("Gamma size is 0.\n");
continue;
}

gamma = XRRAllocGamma(size);
if (!gamma) {
fatal("Gamma allocation failed.\n");
continue;
}

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

if (output->gamma.green == 1.0)
   gamma->green[i] = i << 8;
else
   gamma->green[i] = (CARD16)(pow((double)i/(double)(size – 1),
      (double)output->gamma.green) * (double)(size – 1) * 256);

if (output->gamma.blue == 1.0)
   gamma->blue[i] = i << 8;
else
   gamma->blue[i] = (CARD16)(pow((double)i/(double)(size – 1),
      (double)output->gamma.blue) * (double)(size – 1) * 256);
}

XRRSetCrtcGamma(dpy, crtc->crtc.xid, gamma);

free(gamma);
}
}

static void
set_primary(void)
{
output_t *output;

if (no_primary) {
XRRSetOutputPrimary(dpy, root, None);
} else {
for (output = outputs; output; output = output->next) {
if (!(output->changes & changes_primary))
continue;
if (output->primary)
XRRSetOutputPrimary(dpy, root, output->output.xid);
}
}
}

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 void
crtc_set_transform (crtc_t *crtc, transform_t *transform)
{
int major, minor;

XRRQueryVersion (dpy, &major, &minor);
if (major > 1 || (major == 1 && minor >= 3))
XRRSetCrtcTransform (dpy, crtc->crtc.xid,
      &transform->transform,
      transform->filter,
      transform->params,
      transform->nparams);
}

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;

if (!equal_transform (&crtc->current_transform, &crtc->pending_transform))
crtc_set_transform (crtc, &crtc->current_transform);
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
{
if (!equal_transform (&crtc->current_transform, &crtc->pending_transform))
crtc_set_transform (crtc, &crtc->pending_transform);
s = XRRSetCrtcConfig (dpy, res, crtc->crtc.xid, CurrentTime,
      crtc->x, crtc->y, mode, crtc->rotation,
      rr_outputs, crtc->noutput);
if (s == RRSetConfigSuccess && crtc->panning_info) {
if (has_1_3)
   s = XRRSetPanning (dpy, res, crtc->crtc.xid, crtc->panning_info);
else
   fatal ("panning needs RandR 1.3\n");
}
}
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);
}

static void
apply (void)
{
Status s;
int c;

/*
* 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
*/
if (grab_server)
XGrabServer (dpy);

/*
* 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;
box_t bounds;

if (!old_mode)
   panic (RRSetConfigFailed, crtc);

/* old position and size information */
mode_geometry (old_mode, crtc_info->rotation,
      &crtc->current_transform.transform,
      &bounds);

x = crtc_info->x + bounds.x1;
y = crtc_info->y + bounds.y1;
w = bounds.x2 – bounds.x1;
h = bounds.y2 – bounds.y1;

/* 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);
}

/*
* 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);
}

set_primary ();

/*
* Release the server grab and let all clients
* respond to the updated state
*/
if (grab_server)
XUngrabServer (dpy);
}

/*
* Use current output state to complete the output list
*/
static void
get_outputs (void)
{
int o;
output_t *q;

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\n", 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;
   }
}
}
output->found = True;

/*
* 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);
}
for (q = outputs; q; q = q->next)
{
if (!q->found)
{
fprintf(stderr, "warning: output %s not found; ignoring\n",
q->output.string);
}
}
}

static 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’
*/
static 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;
if (!equal_transform (&crtc->current_transform, &output->transform))
return False;
}
else if (crtc->crtc_info->noutput)
{
/* make sure the state matches the already used state */
XRRModeInfo *mode = find_mode_by_xid (crtc->crtc_info->mode);

if (mode != output->mode_info)
return False;
if (crtc->crtc_info->x != output->x)
return False;
if (crtc->crtc_info->y != output->y)
return False;
if (crtc->crtc_info->rotation != output->rotation)
return False;
}
return True;
}

static 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;
box_t bounds;

if (!mode_info) continue;

mode_geometry (mode_info, output->rotation,
   &output->transform.transform,
   &bounds);
x = output->x + bounds.x1;
y = output->y + bounds.y1;
w = bounds.x2 – bounds.x1;
h = bounds.y2 – bounds.y1;
/* make sure output fits in specified size */
if (fb_specified)
{
if (x + w > fb_width || y + h > fb_height)
   warning ("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
{
XRRPanning *pan;
if (x + w > fb_width)
   fb_width = x + w;
if (y + h > fb_height)
   fb_height = y + h;
if (output->changes & changes_panning)
   pan = &output->panning;
else
   pan = output->crtc_info ? output->crtc_info->panning_info : NULL;
if (pan && pan->left + pan->width > fb_width)
   fb_width = pan->left + pan->width;
if (pan && pan->top + pan->height > fb_height)
   fb_height = pan->top + pan->height;
}
}

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

static void
disable_outputs (output_t *outputs)
{
while (outputs)
{
outputs->crtc_info = NULL;
outputs = outputs->next;
}
}

/*
* find the best mapping from output to crtc available
*/
static 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;
}
}
if (output->crtc_info != best_crtc)
output->crtc_info = best_crtc;
/*
* Reset other outputs based on this one using the best crtc
*/
(void) pick_crtcs_score (outputs);

return best_score;
}

/*
* Pick crtcs for any changing outputs that don’t have one
*/
static 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)
{
if (output->crtc_info) {
   if (output->crtc_info->crtc_info->noutput > 0 &&
   (output->crtc_info->crtc_info->noutput > 1 ||
   output != find_output_by_xid (output->crtc_info->crtc_info->outputs[0])))
   break;
} else {
   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;
}
}

static int
check_strtol(char *s)
{
char *endptr;
int result = strtol(s, &endptr, 10);
if (s == endptr)
usage();
return result;
}

static int
check_strtod(char *s)
{
char *endptr;
double result = strtod(s, &endptr);
if (s == endptr)
usage();
return result;
}

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;
double   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;
Bool current = False;
#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 ("–nograb", argv[i])) {
grab_server = False;
continue;
}
if (!strcmp("–current", argv[i])) {
current = True;
/* if –current was the only arg, then query */
if (argc == 2) query = 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 = check_strtol(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 ();
rate = check_strtod(argv[i]);
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 = check_strtol(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, 10);
if (argv[i] == endptr) {
   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 ("–props", argv[i]) ||
!strcmp ("–madprops", argv[i]) ||
!strcmp ("–properties", argv[i]))
{
query_1_2 = True;
properties = True;
continue;
}
if (!strcmp ("–output", argv[i])) {
if (++i >= argc) usage();

output = find_output_by_name (argv[i]);
if (!output) {
   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 ("–panning", argv[i])) {
XRRPanning *pan;
if (++i>=argc) usage ();
if (!output) usage();
pan = &output->panning;
switch (sscanf (argv[i], "%dx%d+%d+%d/%dx%d+%d+%d/%d/%d/%d/%d",
      &pan->width, &pan->height, &pan->left, &pan->top,
      &pan->track_width, &pan->track_height,
      &pan->track_left, &pan->track_top,
      &pan->border_left, &pan->border_top,
      &pan->border_right, &pan->border_bottom)) {
case 2:
   pan->left = pan->top = 0;
   /* fall through */
case 4:
   pan->track_left = pan->track_top =
   pan->track_width = pan->track_height = 0;
   /* fall through */
case 8:
   pan->border_left = pan->border_top =
   pan->border_right = pan->border_bottom = 0;
   /* fall through */
case 12:
   break;
default:
   usage ();
}
output->changes |= changes_panning;
continue;
}
if (!strcmp ("–gamma", argv[i])) {
if (!output) usage();
if (++i>=argc) usage ();
if (sscanf(argv[i], "%f:%f:%f", &output->gamma.red,
   &output->gamma.green, &output->gamma.blue) != 3)
   usage ();
output->changes |= changes_gamma;
setit_1_2 = True;
continue;
}
if (!strcmp ("–primary", argv[i])) {
if (!output) usage();
output->changes |= changes_primary;
output->primary = True;
setit_1_2 = True;
continue;
}
if (!strcmp ("–noprimary", argv[i])) {
no_primary = True;
setit_1_2 = True;
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 ("–scale", argv[i]))
{
double sx, sy;
if (++i>=argc) usage();
if (sscanf (argv[i], "%lfx%lf", &sx, &sy) != 2)
   usage ();
init_transform (&output->transform);
output->transform.transform.matrix[0][0] = XDoubleToFixed (sx);
output->transform.transform.matrix[1][1] = XDoubleToFixed (sy);
output->transform.transform.matrix[2][2] = XDoubleToFixed (1.0);
if (sx != 1 || sy != 1)
   output->transform.filter = "bilinear";
else
   output->transform.filter = "nearest";
output->transform.nparams = 0;
output->transform.params = NULL;
output->changes |= changes_transform;
continue;
}
if (!strcmp ("–transform", argv[i])) {
double transform[3][3];
int k, l;
if (++i>=argc) usage ();
init_transform (&output->transform);
if (strcmp (argv[i], "none") != 0)
{
   if (sscanf(argv[i], "%lf,%lf,%lf,%lf,%lf,%lf,%lf,%lf,%lf",
      &transform[0][0],&transform[0][1],&transform[0][2],
      &transform[1][0],&transform[1][1],&transform[1][2],
      &transform[2][0],&transform[2][1],&transform[2][2])
   != 9)
   usage ();
   init_transform (&output->transform);
   for (k = 0; k < 3; k++)
   for (l = 0; l < 3; l++) {
      output->transform.transform.matrix[k][l] = XDoubleToFixed (transform[k][l]);
   }
   output->transform.filter = "bilinear";
   output->transform.nparams = 0;
   output->transform.params = NULL;
}
output->changes |= changes_transform;
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])) {
char *strtod_error;
if (++i>=argc) usage ();
dpi = strtod(argv[i], &strtod_error);
if (argv[i] == strtod_error)
{
   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));
double clock;

++i;
if (i + 9 >= argc) usage ();
m->mode.name = argv[i];
m->mode.nameLength = strlen (argv[i]);
i++;
clock = check_strtod(argv[i++]);
m->mode.dotClock = clock * 1e6;

m->mode.width = check_strtol(argv[i++]);
m->mode.hSyncStart = check_strtol(argv[i++]);
m->mode.hSyncEnd = check_strtol(argv[i++]);
m->mode.hTotal = check_strtol(argv[i++]);
m->mode.height = check_strtol(argv[i++]);
m->mode.vSyncStart = check_strtol(argv[i++]);
m->mode.vSyncEnd = check_strtol(argv[i++]);
m->mode.vTotal = check_strtol(argv[i++]);
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;
}
if (version)
printf("xrandr program version " VERSION "\n");

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 (major > 1 || (major == 1 && minor >= 3))
has_1_3 = True;

if (has_1_2 && modeit)
{
umode_t *m;

get_screen (current);
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 (current);
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;
   }
   else
   continue;
   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 (current);
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);
}
}

/*
* Set panning
*/
set_panning ();

/*
* Set gamma on crtc’s that belong to the outputs.
*/
set_gamma ();

/*
* 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 0×80000000

get_screen (current);
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;
crtc_t *crtc = output->crtc_info;
XRRCrtcInfo *crtc_info = crtc ? crtc->crtc_info : NULL;
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)
{
   if (crtc_info) {
   printf (" %dx%d+%d+%d",
      crtc_info->width, crtc_info->height,
      crtc_info->x, crtc_info->y);
   } else {
   printf (" %dx%d+%d+%d",
      mode->width, mode->height, output->x, output->y);
   }
   if (verbose)
   printf (" (0x%x)", (int)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",
(int)output_info->mm_width, (int)output_info->mm_height);
}

if (crtc && crtc->panning_info && crtc->panning_info->width > 0)
{
   XRRPanning *pan = crtc->panning_info;
   printf (" panning %dx%d+%d+%d",
      pan->width, pan->height, pan->left, pan->top);
   if ((pan->track_width != 0 &&
   (pan->track_left != pan->left ||
   pan->track_width != pan->width   ||
   pan->border_left != 0      ||
   pan->border_right != 0))    ||
   (pan->track_height != 0 &&
   (pan->track_top != pan->top    ||
   pan->track_height != pan->height    ||
   pan->border_top != 0      ||
   pan->border_bottom != 0)))
   printf (" tracking %dx%d+%d+%d border %d/%d/%d/%d",
      pan->track_width, pan->track_height,
      pan->track_left, pan->track_top,
      pan->border_left, pan->border_top,
      pan->border_right, pan->border_bottom);
}
printf ("\n");

if (verbose)
{
   printf ("\tIdentifier: 0x%x\n", (int)output->output.xid);
   printf ("\tTimestamp: %d\n", (int)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 (output->crtc_info && output->crtc_info->panning_info) {
   XRRPanning *pan = output->crtc_info->panning_info;
   printf ("\tPanning: %dx%d+%d+%d\n",
      pan->width, pan->height, pan->left, pan->top);
   printf ("\tTracking: %dx%d+%d+%d\n",
      pan->track_width, pan->track_height,
      pan->track_left, pan->track_top);
   printf ("\tBorder: %d/%d/%d/%d\n",
      pan->border_left, pan->border_top,
      pan->border_right, pan->border_bottom);
   }
}
if (verbose)
{
   int x, y;

   printf ("\tTransform: ");
   for (y = 0; y < 3; y++)
   {
   for (x = 0; x < 3; x++)
      printf (" %f", XFixedToDouble (output->transform.transform.matrix[y][x]));
   if (y < 2)
      printf ("\n\t ");
   }
   if (output->transform.filter)
   printf ("\n\t filter: %s", output->transform.filter);
   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: ", XGetAtomName (dpy, props[j]));
      for (k = 0; k < nitems; k++) {
      if (k > 0)
         printf ("\n\t\t\t");
      printf("%d (0x%08x)",
         (int)((INT32 *)prop)[k], (int)((INT32 *)prop)[k]);
      }

      if (propinfo->range && propinfo->num_values > 0) {
      if (nitems > 1)
         printf ("\n\t\t");
      printf("\trange%s: ",
         (propinfo->num_values == 2) ? "" : "s");

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

      printf("\n");
   } else if (actual_type == XA_ATOM &&
      actual_format == 32)
   {
      printf("\t%s:", XGetAtomName (dpy, props[j]));
      for (k = 0; k < nitems; k++) {
      if (k > 0 && (k & 1) == 0)
         printf ("\n\t\t");
      printf("\t%s", XGetAtomName (dpy, ((Atom *)prop)[k]));
      }

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%s: %s%s\n", XGetAtomName (dpy, props[j]),
         prop, bytes_after ? "…" : "");
   } else {
      char *type = actual_type ? XGetAtomName (dpy, actual_type) : "none";
      printf ("\t%s: %s(%d) (format %d items %d) ????\n",
         XGetAtomName (dpy, props[j]),
         type, (int)actual_type, actual_format, (int)nitems);
   }

   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, (int)mode->id,
      (double)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);
   if (mode == output->mode_info)
      printf (" *current");
   if (j < output_info->npreferred)
      printf (" +preferred");
   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, (int)mode->id,
      (double)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,
               root,
               (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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