aboutsummaryrefslogblamecommitdiffstats
path: root/src/gamma-w32-gdi.h
blob: 7bf8356dfcabbc3f7ed86f70c45b517fd557c265 (plain) (tree)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
















                                                                           

                                


                                 
                                                                   










                                                                          
                                                                                         













                                                                         

                                                                          





                                             
                                                                         







                                                                       
                                                                        










                                                                                

                                                                                                  





                                                  
                                                                                   

   





                                                                            
                                                                                  










                                                                                     

                                                                                                  





                                             
                                                                         

   





                                                                          
                                                                        









                                                                                                

                                                                                                








                                                                        

                                                                                  








                                                                        

                                                                               

 

      
/**
 * 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_W32_GDI_H
#define LIBGAMMA_GAMMA_W32_GDI_H


#ifndef HAVE_GAMMA_METHOD_W32_GDI
# error Including gamma-w32-gdi.h without HAVE_GAMMA_METHOD_W32_GDI
#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_w32_gdi_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_w32_gdi_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_w32_gdi_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_w32_gdi_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_w32_gdi_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_w32_gdi_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_w32_gdi_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_w32_gdi_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_w32_gdi_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_w32_gdi_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_w32_gdi_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_w32_gdi_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_w32_gdi_crtc_set_gamma_ramps(libgamma_crtc_state_t* restrict this,
					  libgamma_gamma_ramps_t ramps);


#endif