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/*
* nvidia-settings: A tool for configuring the NVIDIA X driver on Unix
* and Linux systems.
*
* Copyright (C) 2004 NVIDIA Corporation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of Version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See Version 2
* of the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the:
*
* Free Software Foundation, Inc.
* 59 Temple Place - Suite 330
* Boston, MA 02111-1307, USA
*
*/
/*
* nv-control-dvc.c - trivial sample NV-CONTROL client that
* demonstrates how to query and set integer attributes.
*
* The attribute NV_CTRL_DIGITAL_VIBRANCE ("Digital Vibrance Control")
* is used as an example. This attribute is interesting because it
* can be controlled on a per-display device basis.
*
* Please see the section "DISPLAY DEVICES" in NV-CONTROL-API.txt for
* an explanation of display devices.
*/
#include <stdio.h>
#include <stdlib.h>
#include <X11/Xlib.h>
#include "NVCtrl.h"
#include "NVCtrlLib.h"
/*
* display_device_name() - return the display device name correspoding
* to the display device mask.
*/
char *display_device_name(int mask)
{
switch (mask) {
case (1 << 0): return "CRT-0"; break;
case (1 << 1): return "CRT-1"; break;
case (1 << 2): return "CRT-2"; break;
case (1 << 3): return "CRT-3"; break;
case (1 << 4): return "CRT-4"; break;
case (1 << 5): return "CRT-5"; break;
case (1 << 6): return "CRT-6"; break;
case (1 << 7): return "CRT-7"; break;
case (1 << 8): return "TV-0"; break;
case (1 << 9): return "TV-1"; break;
case (1 << 10): return "TV-2"; break;
case (1 << 11): return "TV-3"; break;
case (1 << 12): return "TV-4"; break;
case (1 << 13): return "TV-5"; break;
case (1 << 14): return "TV-6"; break;
case (1 << 15): return "TV-7"; break;
case (1 << 16): return "DFP-0"; break;
case (1 << 17): return "DFP-1"; break;
case (1 << 18): return "DFP-2"; break;
case (1 << 19): return "DFP-3"; break;
case (1 << 20): return "DFP-4"; break;
case (1 << 21): return "DFP-5"; break;
case (1 << 22): return "DFP-6"; break;
case (1 << 23): return "DFP-7"; break;
default: return "Unknown";
}
} /* display_device_name() */
int main(int argc, char *argv[])
{
Display *dpy;
Bool ret;
int screen, retval, setval = -1;
int display_devices, mask;
NVCTRLAttributeValidValuesRec valid_values;
/*
* If there is a commandline argument, interpret it as the value
* to use to set DVC.
*/
if (argc == 2) {
setval = atoi(argv[1]);
}
/*
* Open a display connection, and make sure the NV-CONTROL X
* extension is present on the screen we want to use.
*/
dpy = XOpenDisplay(NULL);
if (!dpy) {
fprintf(stderr, "Cannot open display '%s'.\n", XDisplayName(NULL));
return 1;
}
screen = DefaultScreen(dpy);
if (!XNVCTRLIsNvScreen(dpy, screen)) {
fprintf(stderr, "The NV-CONTROL X not available on screen "
"%d of '%s'.\n", screen, XDisplayName(NULL));
return 1;
}
/*
* Get the bitmask of enabled display devices
*/
ret = XNVCTRLQueryAttribute(dpy,
screen,
0,
NV_CTRL_ENABLED_DISPLAYS,
&display_devices);
if (!ret) {
fprintf(stderr, "Unable to determine enabled display devices for "
"screen %d of '%s'\n", screen, XDisplayName(NULL));
return 1;
}
/*
* loop over each enabled display device
*/
for (mask = 1; mask < (1<<24); mask <<= 1) {
if (!(mask & display_devices)) continue;
/*
* Query the valid values for NV_CTRL_DIGITAL_VIBRANCE
*/
ret = XNVCTRLQueryValidAttributeValues(dpy,
screen,
mask,
NV_CTRL_DIGITAL_VIBRANCE,
&valid_values);
if (!ret) {
fprintf(stderr, "Unable to query the valid values for "
"NV_CTRL_DIGITAL_VIBRANCE on display device %s of "
"screen %d of '%s'.\n",
display_device_name(mask),
screen, XDisplayName(NULL));
return 1;
}
/* we assume that NV_CTRL_DIGITAL_VIBRANCE is a range type */
if (valid_values.type != ATTRIBUTE_TYPE_RANGE) {
fprintf(stderr, "NV_CTRL_DIGITAL_VIBRANCE is not of "
"type RANGE.\n");
return 1;
}
/* print the range of valid values */
printf("Valid values for NV_CTRL_DIGITAL_VIBRANCE: (%d - %d).\n",
valid_values.u.range.min, valid_values.u.range.max);
/*
* if a value was specified on the commandline, set it;
* otherwise, query the current value
*/
if (setval != -1) {
XNVCTRLSetAttribute(dpy,
screen,
mask,
NV_CTRL_DIGITAL_VIBRANCE,
setval);
XFlush(dpy);
printf("Set NV_CTRL_DIGITAL_VIBRANCE to %d on display device "
"%s of screen %d of '%s'.\n", setval,
display_device_name(mask),
screen, XDisplayName(NULL));
} else {
ret = XNVCTRLQueryAttribute(dpy,
screen,
mask,
NV_CTRL_DIGITAL_VIBRANCE,
&retval);
printf("The current value of NV_CTRL_DIGITAL_VIBRANCE "
"is %d on display device %s of screen %d of '%s'.\n",
retval, display_device_name(mask),
screen, XDisplayName(NULL));
}
}
return 0;
}
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