mirror of
https://gitlab.freedesktop.org/wayland/weston
synced 2024-09-06 18:05:39 +00:00
![Andrew Wedgbury](/assets/img/avatar_default.png)
There was an issue recently in screen-share.c where config.h was not being included, resulting in the wrong definition for off_t being used on 32 bit systems. I checked and I don't think this problem is happening elsewhere, but to help avoid this sort of problem in the future, I went through and made sure that config.h is included first whenever system headers are included. The config.h header should be included before any system headers, failing to do this can result in the wrong type sizes being defined on certain systems, e.g. off_t from sys/types.h Signed-off-by: Andrew Wedgbury <andrew.wedgbury@realvnc.com>
189 lines
5 KiB
C
189 lines
5 KiB
C
/*
|
|
* Copyright © 2012 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.
|
|
*
|
|
* Author: Tiago Vignatti
|
|
*/
|
|
/*
|
|
* \file setbacklight.c
|
|
* Test program to get a backlight connector and set its brightness value.
|
|
* Queries for the connectors id can be performed using drm/tests/modeprint
|
|
* program.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <xf86drm.h>
|
|
#include <xf86drmMode.h>
|
|
|
|
#include "libbacklight.h"
|
|
|
|
static uint32_t
|
|
get_drm_connector_type(struct udev_device *drm_device, uint32_t connector_id)
|
|
{
|
|
const char *filename;
|
|
int fd, i, connector_type;
|
|
drmModeResPtr res;
|
|
drmModeConnectorPtr connector;
|
|
|
|
filename = udev_device_get_devnode(drm_device);
|
|
fd = open(filename, O_RDWR | O_CLOEXEC);
|
|
if (fd < 0) {
|
|
printf("couldn't open drm_device\n");
|
|
return -1;
|
|
}
|
|
|
|
res = drmModeGetResources(fd);
|
|
if (res == 0) {
|
|
printf("Failed to get resources from card\n");
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
|
|
for (i = 0; i < res->count_connectors; i++) {
|
|
connector = drmModeGetConnector(fd, res->connectors[i]);
|
|
if (!connector)
|
|
continue;
|
|
|
|
if ((connector->connection == DRM_MODE_DISCONNECTED) ||
|
|
(connector->connector_id != connector_id)) {
|
|
drmModeFreeConnector(connector);
|
|
continue;
|
|
}
|
|
|
|
connector_type = connector->connector_type;
|
|
drmModeFreeConnector(connector);
|
|
drmModeFreeResources(res);
|
|
|
|
close(fd);
|
|
return connector_type;
|
|
}
|
|
|
|
close(fd);
|
|
drmModeFreeResources(res);
|
|
return -1;
|
|
}
|
|
|
|
/* returns a value between 0-255 range, where higher is brighter */
|
|
static uint32_t
|
|
get_normalized_backlight(struct backlight *backlight)
|
|
{
|
|
long brightness, max_brightness;
|
|
long norm;
|
|
|
|
brightness = backlight_get_brightness(backlight);
|
|
max_brightness = backlight_get_max_brightness(backlight);
|
|
|
|
/* convert it to a scale of 0 to 255 */
|
|
norm = (brightness * 255)/(max_brightness);
|
|
|
|
return (int) norm;
|
|
}
|
|
|
|
static void
|
|
set_backlight(struct udev_device *drm_device, int connector_id, int blight)
|
|
{
|
|
int connector_type;
|
|
long max_brightness, brightness, actual_brightness;
|
|
struct backlight *backlight;
|
|
long new_blight;
|
|
|
|
connector_type = get_drm_connector_type(drm_device, connector_id);
|
|
if (connector_type < 0)
|
|
return;
|
|
|
|
backlight = backlight_init(drm_device, connector_type);
|
|
if (!backlight) {
|
|
printf("backlight adjust failed\n");
|
|
return;
|
|
}
|
|
|
|
max_brightness = backlight_get_max_brightness(backlight);
|
|
printf("Max backlight: %ld\n", max_brightness);
|
|
|
|
brightness = backlight_get_brightness(backlight);
|
|
printf("Cached backlight: %ld\n", brightness);
|
|
|
|
actual_brightness = backlight_get_actual_brightness(backlight);
|
|
printf("Hardware backlight: %ld\n", actual_brightness);
|
|
|
|
printf("normalized current brightness: %d\n",
|
|
get_normalized_backlight(backlight));
|
|
|
|
/* denormalized value */
|
|
new_blight = (blight * max_brightness) / 255;
|
|
|
|
backlight_set_brightness(backlight, new_blight);
|
|
printf("Setting brightness to: %ld (norm: %d)\n", new_blight, blight);
|
|
|
|
backlight_destroy(backlight);
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
int blight, connector_id;
|
|
const char *path;
|
|
struct udev *udev;
|
|
struct udev_enumerate *e;
|
|
struct udev_list_entry *entry;
|
|
struct udev_device *drm_device;
|
|
|
|
if (argc < 3) {
|
|
printf("Please add connector_id and brightness values from 0-255\n");
|
|
return 1;
|
|
}
|
|
|
|
connector_id = atoi(argv[1]);
|
|
blight = atoi(argv[2]);
|
|
|
|
udev = udev_new();
|
|
if (udev == NULL) {
|
|
printf("failed to initialize udev context\n");
|
|
return 1;
|
|
}
|
|
|
|
e = udev_enumerate_new(udev);
|
|
udev_enumerate_add_match_subsystem(e, "drm");
|
|
udev_enumerate_add_match_sysname(e, "card[0-9]*");
|
|
|
|
udev_enumerate_scan_devices(e);
|
|
drm_device = NULL;
|
|
udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
|
|
path = udev_list_entry_get_name(entry);
|
|
drm_device = udev_device_new_from_syspath(udev, path);
|
|
break;
|
|
}
|
|
|
|
if (drm_device == NULL) {
|
|
printf("no drm device found\n");
|
|
return 1;
|
|
}
|
|
|
|
set_backlight(drm_device, connector_id, blight);
|
|
|
|
udev_device_unref(drm_device);
|
|
return 0;
|
|
}
|