1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
/* See LICENSE file for copyright and license details. */
#define IN_LIBGAMMA_X_RANDR
#include "common.h"
/**
* Get the current gamma ramps for a CRTC, 16-bit gamma-depth version
*
* @param this The CRTC state
* @param ramps The gamma ramps to fill with the current values
* @return Zero on success, otherwise (negative) the value of an
* error identifier provided by this library
*/
int
libgamma_x_randr_crtc_get_gamma_ramps16(libgamma_crtc_state_t *restrict this, libgamma_gamma_ramps16_t *restrict ramps)
{
xcb_connection_t *restrict connection = this->partition->site->data;
xcb_randr_get_crtc_gamma_cookie_t cookie;
xcb_randr_get_crtc_gamma_reply_t *restrict reply;
xcb_generic_error_t *error;
uint16_t *restrict red;
uint16_t *restrict green;
uint16_t *restrict blue;
#ifdef DEBUG
/* Gamma ramp sizes are identical but not fixed */
if (ramps->red_size != ramps->green_size || ramps->red_size != ramps->blue_size)
return LIBGAMMA_MIXED_GAMMA_RAMP_SIZE;
#endif
/* Read current gamma ramps */
cookie = xcb_randr_get_crtc_gamma(connection, *(xcb_randr_crtc_t *)this->data);
reply = xcb_randr_get_crtc_gamma_reply(connection, cookie, &error);
/* Check for errors */
if (error)
return libgamma_x_randr_internal_translate_error(error->error_code, LIBGAMMA_GAMMA_RAMP_READ_FAILED, 0);
/* Get current gamma ramps from response */
red = xcb_randr_get_crtc_gamma_red(reply);
green = xcb_randr_get_crtc_gamma_green(reply);
blue = xcb_randr_get_crtc_gamma_blue(reply);
/* Copy over the gamma ramps to our memory */
memcpy(ramps->red, red, ramps->red_size * sizeof(uint16_t));
memcpy(ramps->green, green, ramps->green_size * sizeof(uint16_t));
memcpy(ramps->blue, blue, ramps->blue_size * sizeof(uint16_t));
free(reply);
return 0;
}
|
