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/* See LICENSE file for copyright and license details. */
#ifdef IN_LIBGAMMA_X_RANDR
# include <xcb/xcb.h>
# include <xcb/randr.h>
/**
* The major version of RandR the library expects
*/
# define RANDR_VERSION_MAJOR 1
/**
* The minor version of RandR the library expects
*/
# define RANDR_VERSION_MINOR 3
/**
* Data structure for partition data
*/
typedef struct libgamma_x_randr_partition_data {
/**
* Mapping from CRTC indices to CRTC identifiers
*/
xcb_randr_crtc_t *crtcs;
/**
* Mapping from output indices to output identifiers
*/
xcb_randr_output_t *outputs;
/**
* The number of outputs available
*/
size_t outputs_count;
/**
* Mapping from CRTC indices to output indices.
* CRTC's without an output (should be impossible)
* have the value `SIZE_MAX` which is impossible
* for an existing mapping
*/
size_t *crtc_to_output;
/**
* Screen configuration timestamp
*/
xcb_timestamp_t config_timestamp;
} libgamma_x_randr_partition_data_t;
#endif
/**
* Return the capabilities of the adjustment method
*
* @param this The data structure to fill with the method's capabilities
*/
LIBGAMMA_GCC_ONLY__(__attribute__((__nonnull__)))
void libgamma_x_randr_method_capabilities(libgamma_method_capabilities_t *restrict);
/**
* 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. Once 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
*/
LIBGAMMA_GCC_ONLY__(__attribute__((__nonnull__(1), __warn_unused_result__)))
int libgamma_x_randr_site_initialise(libgamma_site_state_t *restrict, char *restrict);
/**
* Release all resources held by a site state.
*
* @param this The site state.
*/
LIBGAMMA_GCC_ONLY__(__attribute__((__nonnull__)))
void libgamma_x_randr_site_destroy(libgamma_site_state_t *restrict);
/**
* Restore the gamma ramps all CRTC:s 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
*/
LIBGAMMA_GCC_ONLY__(__attribute__((__nonnull__, __warn_unused_result__)))
int libgamma_x_randr_site_restore(libgamma_site_state_t *restrict);
/**
* 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
*/
LIBGAMMA_GCC_ONLY__(__attribute__((__nonnull__, __warn_unused_result__)))
int libgamma_x_randr_partition_initialise(libgamma_partition_state_t *restrict, libgamma_site_state_t *restrict, size_t);
/**
* Release all resources held by a partition state
*
* @param this The partition state
*/
LIBGAMMA_GCC_ONLY__(__attribute__((__nonnull__)))
void libgamma_x_randr_partition_destroy(libgamma_partition_state_t *restrict);
/**
* Restore the gamma ramps all CRTC:s 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
*/
LIBGAMMA_GCC_ONLY__(__attribute__((__nonnull__, __warn_unused_result__)))
int libgamma_x_randr_partition_restore(libgamma_partition_state_t *restrict);
/**
* 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
*/
LIBGAMMA_GCC_ONLY__(__attribute__((__nonnull__, __warn_unused_result__)))
int libgamma_x_randr_crtc_initialise(libgamma_crtc_state_t *restrict, libgamma_partition_state_t *restrict, size_t);
/**
* Release all resources held by a CRTC state
*
* @param this The CRTC state
*/
LIBGAMMA_GCC_ONLY__(__attribute__((__nonnull__)))
void libgamma_x_randr_crtc_destroy(libgamma_crtc_state_t *restrict);
/**
* 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
*/
LIBGAMMA_GCC_ONLY__(__attribute__((__nonnull__, __warn_unused_result__)))
int libgamma_x_randr_crtc_restore(libgamma_crtc_state_t *restrict);
/**
* 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`
*/
LIBGAMMA_GCC_ONLY__(__attribute__((__nonnull__, __warn_unused_result__)))
int libgamma_x_randr_get_crtc_information(libgamma_crtc_information_t *restrict, libgamma_crtc_state_t *restrict, unsigned long long);
/**
* 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
*/
LIBGAMMA_GCC_ONLY__(__attribute__((__nonnull__, __warn_unused_result__)))
int libgamma_x_randr_crtc_get_gamma_ramps16(libgamma_crtc_state_t *restrict, libgamma_gamma_ramps16_t *restrict);
/**
* 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
*/
LIBGAMMA_GCC_ONLY__(__attribute__((__nonnull__, __warn_unused_result__)))
int libgamma_x_randr_crtc_set_gamma_ramps16(libgamma_crtc_state_t *restrict, const libgamma_gamma_ramps16_t *restrict);
#ifdef IN_LIBGAMMA_X_RANDR
/**
* Translate an xcb error into a libgamma error
*
* @param error_code The xcb error
* @param default_error The libgamma error to use if the xcb error is not recognised
* @param return_errno Whether an `errno` value may be returned
* @return The libgamma error
*/
LIBGAMMA_GCC_ONLY__(__attribute__((__warn_unused_result__)))
int libgamma_x_randr_internal_translate_error(int, int, int);
/* xcb violates the rule to never return struct:s */
# ifdef __GNUC__
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Waggregate-return"
# endif
#endif
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