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2641 lines (2367 loc) · 64.2 KB
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/*
* 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 <stdint.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 {
cloned, extend
} policy_t;
typedef enum _relation {
left_of, right_of, above, below, same_as
1798
} 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"};
*/
static char *connection[3] = {
"true",
"false",
"unknown"};
#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%lx", &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))
10BC8
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_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;
}
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)
<
10BC8
div>
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]);