From f52513b09580c1533e6c48a4162d3d5f61f3b081 Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Fri, 5 Mar 2021 18:23:13 +0100 Subject: misc MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- libgamma_x_randr_crtc_get_gamma_ramps16.c | 50 +++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 libgamma_x_randr_crtc_get_gamma_ramps16.c (limited to 'libgamma_x_randr_crtc_get_gamma_ramps16.c') diff --git a/libgamma_x_randr_crtc_get_gamma_ramps16.c b/libgamma_x_randr_crtc_get_gamma_ramps16.c new file mode 100644 index 0000000..5e6ad5d --- /dev/null +++ b/libgamma_x_randr_crtc_get_gamma_ramps16.c @@ -0,0 +1,50 @@ +/* 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; +} -- cgit v1.2.3-70-g09d2