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/**
* libgamma — Display server abstraction layer for gamma ramp adjustments
* Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library 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 the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef LIBGAMMA_GAMMA_X_VIDMODE_H
#define LIBGAMMA_GAMMA_X_VIDMODE_H
#ifndef HAVE_GAMMA_METHOD_X_VIDMODE
# error Including gamma-x-vidmode.h without HAVE_GAMMA_METHOD_X_VIDMODE
#endif
#include "libgamma-method.h"
/**
* Return the capabilities of the adjustment method
*
* @param this The data structure to fill with the method's capabilities
*/
void libgamma_x_vidmode_method_capabilities(libgamma_method_capabilities_t* restrict this);
/**
* Initialise an allocated site state
*
* @param this The site state to initialise
* @param site The site identifier, unless it is `NULL` it must a
* `free`:able. One the state is destroyed the library
* will attempt to free it. There you should not free
* it yourself, and it must not be a string constant
* or allocate on the stack. Note however that it will
* not be free:d if this function fails.
* @return Zero on success, otherwise (negative) the value of an
* error identifier provided by this library
*/
int libgamma_x_vidmode_site_initialise(libgamma_site_state_t* restrict this,
char* restrict site);
/**
* Release all resources held by a site state
*
* @param this The site state
*/
void libgamma_x_vidmode_site_destroy(libgamma_site_state_t* restrict this);
/**
* Restore the gamma ramps all CRTCS with a site to the system settings
*
* @param this The site state
* @return Zero on success, otherwise (negative) the value of an
* error identifier provided by this library
*/
int libgamma_x_vidmode_site_restore(libgamma_site_state_t* restrict this);
/**
* Initialise an allocated partition state
*
* @param this The partition state to initialise
* @param site The site state for the site that the partition belongs to
* @param partition The the index of the partition within the site
* @return Zero on success, otherwise (negative) the value of an
* error identifier provided by this library
*/
int libgamma_x_vidmode_partition_initialise(libgamma_partition_state_t* restrict this,
libgamma_site_state_t* restrict site, size_t partition);
/**
* Release all resources held by a partition state
*
* @param this The partition state
*/
void libgamma_x_vidmode_partition_destroy(libgamma_partition_state_t* restrict this);
/**
* Restore the gamma ramps all CRTCS with a partition to the system settings
*
* @param this The partition state
* @return Zero on success, otherwise (negative) the value of an
* error identifier provided by this library
*/
int libgamma_x_vidmode_partition_restore(libgamma_partition_state_t* restrict this);
/**
* Initialise an allocated CRTC state
*
* @param this The CRTC state to initialise
* @param partition The partition state for the partition that the CRTC belongs to
* @param crtc The the index of the CRTC within the site
* @return Zero on success, otherwise (negative) the value of an
* error identifier provided by this library
*/
int libgamma_x_vidmode_crtc_initialise(libgamma_crtc_state_t* restrict this,
libgamma_partition_state_t* restrict partition, size_t crtc);
/**
* Release all resources held by a CRTC state
*
* @param this The CRTC state
*/
void libgamma_x_vidmode_crtc_destroy(libgamma_crtc_state_t* restrict this);
/**
* Restore the gamma ramps for a CRTC to the system settings for that CRTC
*
* @param this The CRTC state
* @return Zero on success, otherwise (negative) the value of an
* error identifier provided by this library
*/
int libgamma_x_vidmode_crtc_restore(libgamma_crtc_state_t* restrict this);
/**
* Read information about a CRTC
*
* @param this Instance of a data structure to fill with the information about the CRTC
* @param crtc The state of the CRTC whose information should be read
* @param fields OR:ed identifiers for the information about the CRTC that should be read
* @return Zero on success, -1 on error. On error refer to the error reports in `this`.
*/
int libgamma_x_vidmode_get_crtc_information(libgamma_crtc_information_t* restrict this,
libgamma_crtc_state_t* restrict crtc, int32_t fields);
/**
* Get current the 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_vidmode_crtc_get_gamma_ramps(libgamma_crtc_state_t* restrict this,
libgamma_gamma_ramps_t* restrict ramps);
/**
* Set the gamma ramps for a CRTC, 16-bit gamma-depth version
*
* @param this The CRTC state
* @param ramps The gamma ramps to apply
* @return Zero on success, otherwise (negative) the value of an
* error identifier provided by this library
*/
int libgamma_x_vidmode_crtc_set_gamma_ramps(libgamma_crtc_state_t* restrict this,
libgamma_gamma_ramps_t ramps);
#endif
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