/**
* libgamma -- Display server abstraction layer for gamma ramp adjustments
* Copyright (C) 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 .
*/
#ifndef HAVE_LIBGAMMA_METHOD_DUMMY
# error Compiling gamma-dummy.c without HAVE_LIBGAMMA_METHOD_DUMMY
#endif
#include "gamma-dummy.h"
#include "libgamma-error.h"
#include "libgamma-method.h"
#include "edid.h"
#include
#include
#include
#include
/**
* Configuration set for the dummy adjustment method.
*/
typedef struct libgamma_dummy_configurations
{
/**
* The method's capabilities.
*
* Some fields are ignored:
* - real
* - fake
*/
libgamma_method_capabilities_t capabilities;
/**
* Template for CRTC:s information.
*
* Some fields are ignored:
* - width_mm_edid
* - width_mm_edid_error
* - height_mm_edid
* - height_mm_edid_error
* - gamma_red
* - gamma_green
* - gamma_blue
* - gamma_error
*/
libgamma_crtc_information_t crtc_info_template;
/**
* The adjustment method to use.
*/
int real_method;
/**
* The number of sites on the system.
*/
size_t site_count;
/**
* The number of paritions on a site before it has been configured.
*/
size_t default_partition_count;
/**
* The number of CRTC:s on a paritions before it has been configured.
*/
size_t default_crtc_count;
/**
* Whether the sites should be inherited from the real method.
*/
unsigned inherit_sites : 1;
/**
* Whether the partitions should be inherited from the real method.
*/
unsigned inherit_partition_count : 1;
/**
* Whether the CRTC:s should be inherited from the real method.
*/
unsigned inherit_crtc_count : 1;
/**
* When a site has been created, stall until the partition count has
* been configured.
*/
unsigned stall_for_partition_count : 1;
/**
* When a parition has been created, stall until the CRTC count has
* been configured.
*/
unsigned stall_for_crtc_count : 1;
/**
* Methods should stall until the system has been configured
* unless $LIBGAMMA_DUMMY_STALL is not true.
*/
unsigned stalled_start : 1;
/**
* Whether to print what is going on in the phony system.
*/
unsigned verbose : 1;
} libgamma_dummy_configurations_t;
/**
* Dummy adjustment method internal data for a CRTC.
*/
typedef struct libgamma_dummy_crtc
{
/**
* The gamma ramp for the red channel.
*/
void* restrict gamma_red;
/**
* The gamma ramp for the green channel.
*/
void* restrict gamma_green;
/**
* The gamma ramp for the blue channel.
*/
void* restrict gamma_blue;
/**
* Information about the CRTC and monitor.
*
* Some fields are ignored:
* - width_mm_edid
* - width_mm_edid_error
* - height_mm_edid
* - height_mm_edid_error
* - gamma_red
* - gamma_green
* - gamma_blue
* - gamma_error
*/
libgamma_crtc_information_t info;
/**
* Partition state that contains this information.
*/
libgamma_crtc_state_t* state;
} libgamma_dummy_crtc_t;
/**
* Dummy adjustment method internal data for a partition.
*/
typedef struct libgamma_dummy_partition
{
/**
* The CRTC:s on the system.
*/
libgamma_dummy_crtc_t* crtcs;
/**
* The number of CRTC:s on the system.
*/
size_t crtc_count;
/**
* Partition state that contains this information.
*/
libgamma_partition_state_t* state;
} libgamma_dummy_partition_t;
/**
* Dummy adjustment method internal data for a site.
*/
typedef struct libgamma_dummy_site
{
/**
* The partitions on the system.
*/
libgamma_dummy_partition_t* partitions;
/**
* The number of partitions on the system.
*/
size_t partition_count;
/**
* Site state that contains this information.
*/
libgamma_site_state_t* state;
} libgamma_dummy_site_t;
/**
* Restore the gamma ramps for a CRTC to the system settings for that CRTC
* and ignore the method's capabilities.
*
* @param this The CRTC data
* @return Zero on success, otherwise (negative) the value of an
* error identifier provided by this library.
*/
static int libgamma_dummy_crtc_restore_forced(libgamma_dummy_crtc_t* restrict data);
/**
* Configurations for the dummy adjustment method.
*/
static libgamma_dummy_configurations_t libgamma_dummy_configurations =
{
.capabilities =
{
.crtc_information = (1 << LIBGAMMA_CRTC_INFO_COUNT) - 1,
.default_site_known = 1,
.multiple_sites = 1,
.multiple_partitions = 1,
.multiple_crtcs = 1,
.partitions_are_graphics_cards = 1,
.site_restore = 1,
.partition_restore = 1,
.crtc_restore = 1,
.identical_gamma_sizes = 0,
.fixed_gamma_size = 0,
.fixed_gamma_depth = 0,
},
.crtc_info_template =
{
.edid = NULL,
.edid_length = 0,
.edid_error = LIBGAMMA_EDID_NOT_FOUND,
.width_mm = 400,
.width_mm_error = 0,
.height_mm = 300,
.height_mm_error = 0,
.red_gamma_size = 1024,
.green_gamma_size = 2048,
.blue_gamma_size = 512,
.gamma_size_error = 0,
.gamma_depth = 64,
.gamma_depth_error = 0,
.gamma_support = 1,
.gamma_support_error = 0,
.subpixel_order = LIBGAMMA_SUBPIXEL_ORDER_HORIZONTAL_RGB,
.subpixel_order_error = 0,
.active = 1,
.active_error = 0,
.connector_name = NULL,
.connector_name_error = LIBGAMMA_CONNECTOR_TYPE_NOT_RECOGNISED,
.connector_type = LIBGAMMA_CONNECTOR_TYPE_Unknown,
.connector_type_error = 0,
},
.real_method = LIBGAMMA_METHOD_DUMMY,
.site_count = 2,
.default_partition_count = 2,
.default_crtc_count = 2,
.inherit_sites = 1,
.inherit_partition_count = 1,
.inherit_crtc_count = 1,
.stall_for_partition_count = 0,
.stall_for_crtc_count = 0,
.stalled_start = 1,
.verbose = 0
};
/**
* Return the capabilities of the adjustment method.
*
* @param this The data structure to fill with the method's capabilities.
*/
void libgamma_dummy_method_capabilities(libgamma_method_capabilities_t* restrict this)
{
*this = libgamma_dummy_configurations.capabilities;
this->real = libgamma_dummy_configurations.real_method != LIBGAMMA_METHOD_DUMMY;
this->fake = this->real;
}
/**
* 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_dummy_site_initialise(libgamma_site_state_t* restrict this,
char* restrict site)
{
libgamma_dummy_site_t* data = NULL;
size_t i, sites, crtcs;
sites = libgamma_dummy_configurations.site_count;
if (libgamma_dummy_configurations.capabilities.multiple_sites == 0)
sites = sites == 0 ? 0 : 1;
this->data = NULL;
if ((site != NULL) && (*site) && ((atoll(site) < 0) || (sites <= (unsigned long long)atoll(site))))
return LIBGAMMA_NO_SUCH_SITE;
data = malloc(sizeof(libgamma_dummy_site_t));
if (data == NULL)
goto fail;
this->data = data;
data->state = this;
data->partition_count = libgamma_dummy_configurations.default_partition_count;
if (libgamma_dummy_configurations.capabilities.multiple_partitions == 0)
data->partition_count = data->partition_count == 0 ? 0 : 1;
crtcs = libgamma_dummy_configurations.default_crtc_count;
if (libgamma_dummy_configurations.capabilities.multiple_crtcs == 0)
crtcs = crtcs == 0 ? 0 : 1;
data->partitions = malloc(data->partition_count * sizeof(libgamma_dummy_partition_t));
if (data->partitions == NULL)
goto fail;
for (i = 0; i < data->partition_count; i++)
data->partitions[i].crtc_count = crtcs;
return 0;
fail:
free(data);
this->data = NULL;
return LIBGAMMA_ERRNO_SET;
}
/**
* Release all resources held by a site state.
*
* @param this The site state.
*/
void libgamma_dummy_site_destroy(libgamma_site_state_t* restrict this)
{
libgamma_dummy_site_t* data = this->data;
if (data == NULL)
return;
free(data->partitions);
free(data);
}
/**
* 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.
*/
int libgamma_dummy_site_restore(libgamma_site_state_t* restrict this)
{
libgamma_dummy_site_t* data = this->data;
size_t i, j;
if (libgamma_dummy_configurations.capabilities.site_restore == 0)
return errno = ENOTSUP, LIBGAMMA_ERRNO_SET;
for (j = 0; j < data->partition_count; j++)
for (i = 0; i < data->partitions[j].crtc_count; i++)
if (libgamma_dummy_crtc_restore_forced(data->partitions[j].crtcs + i) < 0)
return -1;
return 0;
}
/**
* 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_dummy_partition_initialise(libgamma_partition_state_t* restrict this,
libgamma_site_state_t* restrict site, size_t partition)
{
libgamma_crtc_information_t template = libgamma_dummy_configurations.crtc_info_template;
libgamma_dummy_site_t* site_data = site->data;
libgamma_dummy_partition_t* data = site_data->partitions + partition;
libgamma_dummy_crtc_t* crtc_data;
size_t i;
this->data = NULL;
if (partition >= site_data->partition_count)
return LIBGAMMA_NO_SUCH_PARTITION;
this->data = data;
data->state = this;
data->crtcs = calloc(data->crtc_count, sizeof(libgamma_dummy_crtc_t));
if (data->crtcs == NULL)
goto fail;
for (i = 0; i < data->crtc_count; i++)
{
crtc_data = data->crtcs + i;
crtc_data->info = template;
/* Duplicate strings. */
if (crtc_data->info.edid != NULL)
{
crtc_data->info.edid = malloc(crtc_data->info.edid_length * sizeof(char));
if (crtc_data->info.edid == NULL)
goto fail;
memcpy(crtc_data->info.edid, template.edid, crtc_data->info.edid_length * sizeof(char));
}
if (crtc_data->info.connector_name != NULL)
{
size_t n = strlen(crtc_data->info.connector_name);
crtc_data->info.connector_name = malloc((n + 1) * sizeof(char));
if (crtc_data->info.connector_name == NULL)
goto fail;
memcpy(crtc_data->info.connector_name, template.connector_name, (n + 1) * sizeof(char));
}
}
return 0;
fail:
for (i = 0; i < data->crtc_count; i++)
{
free(data->crtcs[i].info.edid);
free(data->crtcs[i].info.connector_name);
}
free(data->crtcs);
data->crtcs = NULL;
return LIBGAMMA_ERRNO_SET;
}
/**
* Release all resources held by a partition state.
*
* @param this The partition state.
*/
void libgamma_dummy_partition_destroy(libgamma_partition_state_t* restrict this)
{
libgamma_dummy_partition_t* data = this->data;
size_t i;
if (data == NULL)
return;
for (i = 0; i < data->crtc_count; i++)
{
free(data->crtcs[i].info.edid);
free(data->crtcs[i].info.connector_name);
}
free(data->crtcs);
data->crtcs = NULL;
}
/**
* 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.
*/
int libgamma_dummy_partition_restore(libgamma_partition_state_t* restrict this)
{
libgamma_dummy_partition_t* data = this->data;
size_t i;
if (libgamma_dummy_configurations.capabilities.partition_restore == 0)
return errno = ENOTSUP, LIBGAMMA_ERRNO_SET;
for (i = 0; i < data->crtc_count; i++)
if (libgamma_dummy_crtc_restore_forced(data->crtcs + i) < 0)
return -1;
return 0;
}
/**
* 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_dummy_crtc_initialise(libgamma_crtc_state_t* restrict this,
libgamma_partition_state_t* restrict partition, size_t crtc)
{
libgamma_dummy_partition_t* partition_data = partition->data;
libgamma_dummy_crtc_t* data = partition_data->crtcs + crtc;
size_t stop_size;
this->data = NULL;
if (crtc >= partition_data->crtc_count)
return LIBGAMMA_NO_SUCH_CRTC;
this->data = data;
data->state = this;
if (data->info.gamma_depth == -1)
stop_size = sizeof(float);
else if (data->info.gamma_depth == -2)
stop_size = sizeof(double);
else
stop_size = (size_t)(data->info.gamma_depth) / 8;
if ((data->gamma_red = malloc(data->info.red_gamma_size * stop_size)) == NULL)
goto fail;
if ((data->gamma_green = malloc(data->info.green_gamma_size * stop_size)) == NULL)
goto fail;
if ((data->gamma_blue = malloc(data->info.blue_gamma_size * stop_size)) == NULL)
goto fail;
return libgamma_dummy_crtc_restore_forced(data);
fail:
free(data->gamma_red), data->gamma_red = NULL;
free(data->gamma_green), data->gamma_green = NULL;
free(data->gamma_blue), data->gamma_blue = NULL;
return LIBGAMMA_ERRNO_SET;
}
/**
* Release all resources held by a CRTC state.
*
* @param this The CRTC state.
*/
void libgamma_dummy_crtc_destroy(libgamma_crtc_state_t* restrict this)
{
libgamma_dummy_crtc_t* data = this->data;
if (data == NULL)
return;
free(data->gamma_red), data->gamma_red = NULL;
free(data->gamma_green), data->gamma_green = NULL;
free(data->gamma_blue), data->gamma_blue = NULL;
}
/**
* 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_dummy_crtc_restore(libgamma_crtc_state_t* restrict this)
{
if (libgamma_dummy_configurations.capabilities.crtc_restore == 0)
return errno = ENOTSUP, LIBGAMMA_ERRNO_SET;
return libgamma_dummy_crtc_restore_forced(this->data);
}
/**
* Restore the gamma ramps for a CRTC to the system settings for that CRTC
* and ignore the method's capabilities.
*
* @param this The CRTC data
* @return Zero on success, otherwise (negative) the value of an
* error identifier provided by this library.
*/
static int libgamma_dummy_crtc_restore_forced(libgamma_dummy_crtc_t* restrict data)
{
size_t rn = data->info.blue_gamma_size;
size_t gn = data->info.green_gamma_size;
size_t bn = data->info.blue_gamma_size;
size_t i;
if (data->gamma_red == NULL)
return 0;
#define __reset_ramps(BITS) \
int ## BITS ## _t* red = data->gamma_red; \
int ## BITS ## _t* green = data->gamma_green; \
int ## BITS ## _t* blue = data->gamma_blue; \
double max = (double)INT ## BITS ## _MAX; \
for (i = 0; i < rn; i++) \
red[i] = (int ## BITS ## _t)(max * ((double)i / (double)(rn - 1))); \
for (i = 0; i < gn; i++) \
green[i] = (int ## BITS ## _t)(max * ((double)i / (double)(gn - 1))); \
for (i = 0; i < bn; i++) \
blue[i] = (int ## BITS ## _t)(max * ((double)i / (double)(bn - 1)))
if (data->info.gamma_depth == 8) { __reset_ramps(8); }
else if (data->info.gamma_depth == 16) { __reset_ramps(16); }
else if (data->info.gamma_depth == 32) { __reset_ramps(32); }
else if (data->info.gamma_depth == 64) { __reset_ramps(64); }
else if (data->info.gamma_depth == -1)
{
float* red = data->gamma_red;
float* green = data->gamma_green;
float* blue = data->gamma_blue;
for (i = 0; i < rn; i++)
red[i] = (float)((double)i / (double)(rn - 1));
for (i = 0; i < gn; i++)
green[i] = (float)((double)i / (double)(gn - 1));
for (i = 0; i < bn; i++)
blue[i] = (float)((double)i / (double)(bn - 1));
}
else
{
double* red = data->gamma_red;
double* green = data->gamma_green;
double* blue = data->gamma_blue;
for (i = 0; i < rn; i++)
red[i] = (double)i / (double)(rn - 1);
for (i = 0; i < gn; i++)
green[i] = (double)i / (double)(gn - 1);
for (i = 0; i < bn; i++)
blue[i] = (double)i / (double)(bn - 1);
}
#undef __reset_ramps
return 0;
}
/**
* 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_dummy_get_crtc_information(libgamma_crtc_information_t* restrict this,
libgamma_crtc_state_t* restrict crtc, int32_t fields)
{
libgamma_dummy_crtc_t* restrict data = crtc->data;
int supported = libgamma_dummy_configurations.capabilities.crtc_information;
int e = 0;
/* Copy over information. */
*this = data->info;
/* Duplicate strings. */
if (this->edid != NULL)
{
this->edid = malloc(this->edid_length * sizeof(char));
if (this->edid == NULL)
this->edid_error = errno;
memcpy(this->edid, data->info.edid, this->edid_length * sizeof(char));
}
if (this->connector_name != NULL)
{
size_t n = strlen(this->connector_name);
this->connector_name = malloc((n + 1) * sizeof(char));
if (this->connector_name == NULL)
this->connector_name_error = errno;
memcpy(this->connector_name, data->info.connector_name, (n + 1) * sizeof(char));
}
/* Parse EDID. */
if ((fields & (LIBGAMMA_CRTC_INFO_MACRO_EDID ^ LIBGAMMA_CRTC_INFO_EDID)))
e |= libgamma_parse_edid(this, fields);
/* Test errors. */
#define _E(FIELD, VAR) \
((fields & FIELD) ? ((supported & FIELD) ? VAR : (VAR = LIBGAMMA_CRTC_INFO_NOT_SUPPORTED)) : 0)
e |= _E(LIBGAMMA_CRTC_INFO_EDID, this->edid_error);
e |= _E(LIBGAMMA_CRTC_INFO_WIDTH_MM, this->width_mm_error);
e |= _E(LIBGAMMA_CRTC_INFO_HEIGHT_MM, this->height_mm_error);
e |= _E(LIBGAMMA_CRTC_INFO_GAMMA_SIZE, this->gamma_size_error);
e |= _E(LIBGAMMA_CRTC_INFO_GAMMA_DEPTH, this->gamma_depth_error);
e |= _E(LIBGAMMA_CRTC_INFO_GAMMA_SUPPORT, this->gamma_support_error);
e |= _E(LIBGAMMA_CRTC_INFO_SUBPIXEL_ORDER, this->subpixel_order_error);
e |= _E(LIBGAMMA_CRTC_INFO_ACTIVE, this->active_error);
e |= _E(LIBGAMMA_CRTC_INFO_CONNECTOR_NAME, this->connector_name_error);
e |= _E(LIBGAMMA_CRTC_INFO_CONNECTOR_TYPE, this->connector_type_error);
if ((fields & LIBGAMMA_CRTC_INFO_WIDTH_MM_EDID) && !(supported & LIBGAMMA_CRTC_INFO_WIDTH_MM_EDID))
e |= this->width_mm_edid_error = LIBGAMMA_CRTC_INFO_NOT_SUPPORTED;
if ((fields & LIBGAMMA_CRTC_INFO_HEIGHT_MM_EDID) && !(supported & LIBGAMMA_CRTC_INFO_HEIGHT_MM_EDID))
e |= this->height_mm_edid_error = LIBGAMMA_CRTC_INFO_NOT_SUPPORTED;
if ((fields & LIBGAMMA_CRTC_INFO_GAMMA) && !(supported & LIBGAMMA_CRTC_INFO_GAMMA))
e |= this->gamma_error = LIBGAMMA_CRTC_INFO_NOT_SUPPORTED;
#undef _E
return e ? -1 : 0;
}
/**
* 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_dummy_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_dummy_crtc_set_gamma_ramps(libgamma_crtc_state_t* restrict this,
libgamma_gamma_ramps_t ramps)
{
}
/**
* Get current the gamma ramps for a CRTC, 32-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_dummy_crtc_get_gamma_ramps32(libgamma_crtc_state_t* restrict this,
libgamma_gamma_ramps32_t* restrict ramps)
{
}
/**
* Set the gamma ramps for a CRTC, 32-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_dummy_crtc_set_gamma_ramps32(libgamma_crtc_state_t* restrict this,
libgamma_gamma_ramps32_t ramps)
{
}
/**
* Get current the gamma ramps for a CRTC, 64-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_dummy_crtc_get_gamma_ramps64(libgamma_crtc_state_t* restrict this,
libgamma_gamma_ramps64_t* restrict ramps)
{
}
/**
* Set the gamma ramps for a CRTC, 64-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_dummy_crtc_set_gamma_ramps64(libgamma_crtc_state_t* restrict this,
libgamma_gamma_ramps64_t ramps)
{
}
/**
* Get current the gamma ramps for a CRTC, `float` 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_dummy_crtc_get_gamma_rampsf(libgamma_crtc_state_t* restrict this,
libgamma_gamma_rampsf_t* restrict ramps)
{
}
/**
* Set the gamma ramps for a CRTC, `float` 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_dummy_crtc_set_gamma_rampsf(libgamma_crtc_state_t* restrict this,
libgamma_gamma_rampsf_t ramps)
{
}
/**
* Get current the gamma ramps for a CRTC, `double` 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_dummy_crtc_get_gamma_rampsd(libgamma_crtc_state_t* restrict this,
libgamma_gamma_rampsd_t* restrict ramps)
{
}
/**
* Set the gamma ramps for a CRTC, `double` 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_dummy_crtc_set_gamma_rampsd(libgamma_crtc_state_t* restrict this,
libgamma_gamma_rampsd_t ramps)
{
}