/**
* 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 .
*/
#include "libgamma-facade.h"
#include "libgamma-error.h"
#include "libgamma-method.h"
#ifdef HAVE_GAMMA_METHOD_DUMMY
# include "gamma-dummy.h"
# ifndef HAVE_GAMMA_METHODS
# define HAVE_GAMMA_METHODS
# endif
#endif
#ifdef HAVE_GAMMA_METHOD_X_RANDR
# include "gamma-x-randr.h"
# ifndef HAVE_GAMMA_METHODS
# define HAVE_GAMMA_METHODS
# endif
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
# include "gamma-x-vidmode.h"
# ifndef HAVE_GAMMA_METHODS
# define HAVE_GAMMA_METHODS
# endif
#endif
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
# include "gamma-linux-drm.h"
# ifndef HAVE_GAMMA_METHODS
# define HAVE_GAMMA_METHODS
# endif
#endif
#ifdef HAVE_GAMMA_METHOD_W32_GDI
# include "gamma-w32-gdi.h"
# ifndef HAVE_GAMMA_METHODS
# define HAVE_GAMMA_METHODS
# endif
#endif
#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
# include "gamma-quartz-cg.h"
# ifndef HAVE_GAMMA_METHODS
# define HAVE_GAMMA_METHODS
# endif
#endif
#include
#include
#include
#include
#include
#include
#ifndef HAVE_GAMMA_METHODS
# define HAVE_NO_GAMMA_METHODS
#endif
#ifdef HAVE_NO_GAMMA_METHODS
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wsuggest-attribute=const"
#endif
#ifdef HAVE_GAMMA_METHODS
# ifdef HAVE_GAMMA_METHOD_LINUX_DRM
/**
* Test whether a file descriptor refers to a VT
*
* @param fd The file descriptor
* @return Whether the file descriptor refers to a VT
*/
static int libgamma_is_vt_proper(int fd)
{
char buf[32];
char digit0;
if (ttyname_r(fd, buf, sizeof(buf) / sizeof(char)))
return 0;
if (strstr(buf, "/dev/tty") != buf)
return 0;
digit0 = buf[strlen("/dev/tty")];
return ('1' <= digit0) && (digit0 <= '9');
}
# endif
/**
* Test the availability of an adjustment method
*
* @param method The adjustment method
* @param operation Allowed values:
* 0: Pass if the environment suggests it will work but is not fake.
* 1: Pass if the environment suggests it will work.
* 2: Pass if real and not fake.
* 3: Pass if real.
* 4: Always pass.
* Other values invoke undefined behaviour.
* @return Whether the test passed
*/
static int libgamma_list_method_test(int method, int operation)
{
libgamma_method_capabilities_t caps;
libgamma_method_capabilities(&caps, method);
switch (operation)
{
case 0: /* Methods that the environment suggests will work, excluding fake. */
if (caps.fake)
return 0;
/* Fall through. */
case 1: /* Methods that the environment suggests will work, including fake. */
if (caps.real == 0)
return 0;
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
if (method == GAMMA_METHOD_LINUX_DRM)
return libgamma_is_vt_proper(STDIN_FILENO) ||
libgamma_is_vt_proper(STDOUT_FILENO) ||
libgamma_is_vt_proper(STDERR_FILENO);
#endif
#ifdef HAVE_GAMMA_METHOD_DUMMY
if (method == GAMMA_METHOD_DUMMY)
return 0;
#endif
return caps.default_site_known;
case 2: /* All real non-fake methods. */
return caps.real && (caps.fake == 0);
case 3: /* All real methods. */
return caps.real;
default: /* All methods. */
return 1;
}
}
#endif
/**
* List available adjustment methods by their order of preference based on the environment
*
* @param methods Output array of methods, should be able to hold `GAMMA_METHOD_COUNT` elements
* @param operation Allowed values:
* 0: Methods that the environment suggests will work, excluding fake.
* 1: Methods that the environment suggests will work, including fake.
* 2: All real non-fake methods.
* 3: All real methods.
* 4: All methods.
* Other values invoke undefined behaviour.
* @return The number of element that have been stored in `methods`
*/
size_t libgamma_list_methods(int* methods, int operation)
{
#ifdef HAVE_NO_GAMMA_METHODS
(void) methods;
(void) operation;
return 0;
#else
size_t n = 0;
#ifdef HAVE_GAMMA_METHOD_X_RANDR
if (libgamma_list_method_test(GAMMA_METHOD_X_RANDR, operation))
methods[n++] = GAMMA_METHOD_X_RANDR;
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
if (libgamma_list_method_test(GAMMA_METHOD_X_VIDMODE, operation))
methods[n++] = GAMMA_METHOD_X_VIDMODE;
#endif
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
if (libgamma_list_method_test(GAMMA_METHOD_LINUX_DRM, operation))
methods[n++] = GAMMA_METHOD_LINUX_DRM;
#endif
#ifdef HAVE_GAMMA_METHOD_W32_GDI
if (libgamma_list_method_test(GAMMA_METHOD_W32_GDI, operation))
methods[n++] = GAMMA_METHOD_W32_GDI;
#endif
#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
if (libgamma_list_method_test(GAMMA_METHOD_QUARTZ_CORE_GRAPHICS, operation))
methods[n++] = GAMMA_METHOD_QUARTZ_CORE_GRAPHICS;
#endif
#ifdef HAVE_GAMMA_METHOD_DUMMY
if (libgamma_list_method_test(GAMMA_METHOD_DUMMY, operation))
methods[n++] = GAMMA_METHOD_DUMMY;
#endif
return n;
#endif
}
/**
* Return the capabilities of an adjustment method
*
* @param this The data structure to fill with the method's capabilities
* @param method The adjustment method (display server and protocol)
*/
void libgamma_method_capabilities(libgamma_method_capabilities_t* restrict this, int method)
{
memset(this, 0, sizeof(libgamma_method_capabilities_t));
switch (method)
{
#ifdef HAVE_GAMMA_METHOD_DUMMY
case GAMMA_METHOD_DUMMY:
libgamma_dummy_method_capabilities(this);
break;
#endif
#ifdef HAVE_GAMMA_METHOD_X_RANDR
case GAMMA_METHOD_X_RANDR:
libgamma_x_randr_method_capabilities(this);
break;
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
case GAMMA_METHOD_X_VIDMODE:
libgamma_x_vidmode_method_capabilities(this);
break;
#endif
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
case GAMMA_METHOD_LINUX_DRM:
libgamma_linux_drm_method_capabilities(this);
break;
#endif
#ifdef HAVE_GAMMA_METHOD_W32_GDI
case GAMMA_METHOD_W32_GDI:
libgamma_w32_gdi_method_capabilities(this);
break;
#endif
#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
case GAMMA_METHOD_QUARTZ_CORE_GRAPHICS:
libgamma_quartz_cg_method_capabilities(this);
break;
#endif
default:
/* Method does not exists/excluded at compile-time.
We will assume that this is not done... */
break;
}
}
/**
* Return the capabilities of an adjustment method
*
* @param method The adjustment method (display server and protocol)
* @return The default site, `NULL` if it cannot be determined or
* if multiple sites are not supported by the adjustment
* method. This value should not be free:d.
*/
char* libgamma_method_default_site(int method)
{
const char* var = libgamma_method_default_site_variable(method);
char* env;
if (var == NULL)
return NULL;
env = getenv(var);
if ((env == NULL) || (*env == '\0'))
return NULL;
return env;
}
/**
* Return the capabilities of an adjustment method
*
* @param method The adjustment method (display server and protocol)
* @return The environ variables that is used to determine the
* default site. `NULL` if there is none, that is, if
* the method does not support multiple sites.
* This value should not be free:d.
*/
const char* libgamma_method_default_site_variable(int method)
{
switch (method)
{
#ifdef HAVE_GAMMA_METHOD_X_RANDR
case GAMMA_METHOD_X_RANDR:
return "DISPLAY";
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
case GAMMA_METHOD_X_VIDMODE:
return "DISPLAY";
#endif
default:
return NULL;
}
}
/**
* Initialise an allocated site state
*
* @param this The site state to initialise
* @param method The adjustment method (display server and protocol)
* @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_site_initialise(libgamma_site_state_t* restrict this,
int method, char* restrict site)
{
this->method = method;
this->site = site;
switch (method)
{
#ifdef HAVE_GAMMA_METHOD_DUMMY
case GAMMA_METHOD_DUMMY:
return libgamma_dummy_site_initialise(this, site);
#endif
#ifdef HAVE_GAMMA_METHOD_X_RANDR
case GAMMA_METHOD_X_RANDR:
return libgamma_x_randr_site_initialise(this, site);
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
case GAMMA_METHOD_X_VIDMODE:
return libgamma_x_vidmode_site_initialise(this, site);
#endif
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
case GAMMA_METHOD_LINUX_DRM:
return libgamma_linux_drm_site_initialise(this, site);
#endif
#ifdef HAVE_GAMMA_METHOD_W32_GDI
case GAMMA_METHOD_W32_GDI:
return libgamma_w32_gdi_site_initialise(this, site);
#endif
#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
case GAMMA_METHOD_QUARTZ_CORE_GRAPHICS:
return libgamma_quartz_cg_site_initialise(this, site);
#endif
default:
return LIBGAMMA_NO_SUCH_ADJUSTMENT_METHOD;
}
}
/**
* Release all resources held by a site state
*
* @param this The site state
*/
void libgamma_site_destroy(libgamma_site_state_t* restrict this)
{
switch (this->method)
{
#ifdef HAVE_GAMMA_METHOD_DUMMY
case GAMMA_METHOD_DUMMY:
libgamma_dummy_site_destroy(this);
break;
#endif
#ifdef HAVE_GAMMA_METHOD_X_RANDR
case GAMMA_METHOD_X_RANDR:
libgamma_x_randr_site_destroy(this);
break;
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
case GAMMA_METHOD_X_VIDMODE:
libgamma_x_vidmode_site_destroy(this);
break;
#endif
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
case GAMMA_METHOD_LINUX_DRM:
libgamma_linux_drm_site_destroy(this);
break;
#endif
#ifdef HAVE_GAMMA_METHOD_W32_GDI
case GAMMA_METHOD_W32_GDI:
libgamma_w32_gdi_site_destroy(this);
break;
#endif
#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
case GAMMA_METHOD_QUARTZ_CORE_GRAPHICS:
libgamma_quartz_cg_site_destroy(this);
break;
#endif
default:
/* Method does not exists/excluded at compile-time.
We will assume that this is not done... */
break;
}
free(this->site);
}
/**
* Release all resources held by a site state
* and free the site state pointer
*
* @param this The site state
*/
void libgamma_site_free(libgamma_site_state_t* restrict this)
{
libgamma_site_destroy(this);
free(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_site_restore(libgamma_site_state_t* restrict this)
{
switch (this->method)
{
#ifdef HAVE_GAMMA_METHOD_DUMMY
case GAMMA_METHOD_DUMMY:
return libgamma_dummy_site_restore(this);
#endif
#ifdef HAVE_GAMMA_METHOD_X_RANDR
case GAMMA_METHOD_X_RANDR:
return libgamma_x_randr_site_restore(this);
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
case GAMMA_METHOD_X_VIDMODE:
return libgamma_x_vidmode_site_restore(this);
#endif
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
case GAMMA_METHOD_LINUX_DRM:
return libgamma_linux_drm_site_restore(this);
#endif
#ifdef HAVE_GAMMA_METHOD_W32_GDI
case GAMMA_METHOD_W32_GDI:
return libgamma_w32_gdi_site_restore(this);
#endif
#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
case GAMMA_METHOD_QUARTZ_CORE_GRAPHICS:
return libgamma_quartz_cg_site_restore(this);
#endif
default:
return LIBGAMMA_NO_SUCH_ADJUSTMENT_METHOD;
}
}
/**
* 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_partition_initialise(libgamma_partition_state_t* restrict this,
libgamma_site_state_t* restrict site, size_t partition)
{
this->site = site;
this->partition = partition;
switch (site->method)
{
#ifdef HAVE_GAMMA_METHOD_DUMMY
case GAMMA_METHOD_DUMMY:
return libgamma_dummy_partition_initialise(this, site, partition);
#endif
#ifdef HAVE_GAMMA_METHOD_X_RANDR
case GAMMA_METHOD_X_RANDR:
return libgamma_x_randr_partition_initialise(this, site, partition);
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
case GAMMA_METHOD_X_VIDMODE:
return libgamma_x_vidmode_partition_initialise(this, site, partition);
#endif
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
case GAMMA_METHOD_LINUX_DRM:
return libgamma_linux_drm_partition_initialise(this, site, partition);
#endif
#ifdef HAVE_GAMMA_METHOD_W32_GDI
case GAMMA_METHOD_W32_GDI:
return libgamma_w32_gdi_partition_initialise(this, site, partition);
#endif
#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
case GAMMA_METHOD_QUARTZ_CORE_GRAPHICS:
return libgamma_quartz_cg_partition_initialise(this, site, partition);
#endif
default:
return LIBGAMMA_NO_SUCH_ADJUSTMENT_METHOD;
}
}
/**
* Release all resources held by a partition state
*
* @param this The partition state
*/
void libgamma_partition_destroy(libgamma_partition_state_t* restrict this)
{
switch (this->site->method)
{
#ifdef HAVE_GAMMA_METHOD_DUMMY
case GAMMA_METHOD_DUMMY:
libgamma_dummy_partition_destroy(this);
break;
#endif
#ifdef HAVE_GAMMA_METHOD_X_RANDR
case GAMMA_METHOD_X_RANDR:
libgamma_x_randr_partition_destroy(this);
break;
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
case GAMMA_METHOD_X_VIDMODE:
libgamma_x_vidmode_partition_destroy(this);
break;
#endif
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
case GAMMA_METHOD_LINUX_DRM:
libgamma_linux_drm_partition_destroy(this);
break;
#endif
#ifdef HAVE_GAMMA_METHOD_W32_GDI
case GAMMA_METHOD_W32_GDI:
libgamma_w32_gdi_partition_destroy(this);
break;
#endif
#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
case GAMMA_METHOD_QUARTZ_CORE_GRAPHICS:
libgamma_quartz_cg_partition_destroy(this);
break;
#endif
default:
/* Method does not exists/excluded at compile-time.
We will assume that this is not done... */
break;
}
}
/**
* Release all resources held by a partition state
* and free the partition state pointer
*
* @param this The partition state
*/
void libgamma_partition_free(libgamma_partition_state_t* restrict this)
{
libgamma_partition_destroy(this);
free(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_partition_restore(libgamma_partition_state_t* restrict this)
{
switch (this->site->method)
{
#ifdef HAVE_GAMMA_METHOD_DUMMY
case GAMMA_METHOD_DUMMY:
return libgamma_dummy_partition_restore(this);
#endif
#ifdef HAVE_GAMMA_METHOD_X_RANDR
case GAMMA_METHOD_X_RANDR:
return libgamma_x_randr_partition_restore(this);
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
case GAMMA_METHOD_X_VIDMODE:
return libgamma_x_vidmode_partition_restore(this);
#endif
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
case GAMMA_METHOD_LINUX_DRM:
return libgamma_linux_drm_partition_restore(this);
#endif
#ifdef HAVE_GAMMA_METHOD_W32_GDI
case GAMMA_METHOD_W32_GDI:
return libgamma_w32_gdi_partition_restore(this);
#endif
#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
case GAMMA_METHOD_QUARTZ_CORE_GRAPHICS:
return libgamma_quartz_cg_partition_restore(this);
#endif
default:
return LIBGAMMA_NO_SUCH_ADJUSTMENT_METHOD;
}
}
/**
* 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_crtc_initialise(libgamma_crtc_state_t* restrict this,
libgamma_partition_state_t* restrict partition, size_t crtc)
{
this->partition = partition;
this->crtc = crtc;
switch (partition->site->method)
{
#ifdef HAVE_GAMMA_METHOD_DUMMY
case GAMMA_METHOD_DUMMY:
return libgamma_dummy_crtc_initialise(this, partition, crtc);
#endif
#ifdef HAVE_GAMMA_METHOD_X_RANDR
case GAMMA_METHOD_X_RANDR:
return libgamma_x_randr_crtc_initialise(this, partition, crtc);
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
case GAMMA_METHOD_X_VIDMODE:
return libgamma_x_vidmode_crtc_initialise(this, partition, crtc);
#endif
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
case GAMMA_METHOD_LINUX_DRM:
return libgamma_linux_drm_crtc_initialise(this, partition, crtc);
#endif
#ifdef HAVE_GAMMA_METHOD_W32_GDI
case GAMMA_METHOD_W32_GDI:
return libgamma_w32_gdi_crtc_initialise(this, partition, crtc);
#endif
#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
case GAMMA_METHOD_QUARTZ_CORE_GRAPHICS:
return libgamma_quartz_cg_crtc_initialise(this, partition, crtc);
#endif
default:
return LIBGAMMA_NO_SUCH_ADJUSTMENT_METHOD;
}
}
/**
* Release all resources held by a CRTC state
*
* @param this The CRTC state
*/
void libgamma_crtc_destroy(libgamma_crtc_state_t* restrict this)
{
switch (this->partition->site->method)
{
#ifdef HAVE_GAMMA_METHOD_DUMMY
case GAMMA_METHOD_DUMMY:
libgamma_dummy_crtc_destroy(this);
break;
#endif
#ifdef HAVE_GAMMA_METHOD_X_RANDR
case GAMMA_METHOD_X_RANDR:
libgamma_x_randr_crtc_destroy(this);
break;
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
case GAMMA_METHOD_X_VIDMODE:
libgamma_x_vidmode_crtc_destroy(this);
break;
#endif
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
case GAMMA_METHOD_LINUX_DRM:
libgamma_linux_drm_crtc_destroy(this);
break;
#endif
#ifdef HAVE_GAMMA_METHOD_W32_GDI
case GAMMA_METHOD_W32_GDI:
libgamma_w32_gdi_crtc_destroy(this);
break;
#endif
#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
case GAMMA_METHOD_QUARTZ_CORE_GRAPHICS:
libgamma_quartz_cg_crtc_destroy(this);
break;
#endif
default:
/* Method does not exists/excluded at compile-time.
We will assume that this is not done... */
break;
}
}
/**
* Release all resources held by a CRTC state
* and free the CRTC state pointer
*
* @param this The CRTC state
*/
void libgamma_crtc_free(libgamma_crtc_state_t* restrict this)
{
libgamma_crtc_destroy(this);
free(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_crtc_restore(libgamma_crtc_state_t* restrict this)
{
switch (this->partition->site->method)
{
#ifdef HAVE_GAMMA_METHOD_DUMMY
case GAMMA_METHOD_DUMMY:
return libgamma_dummy_crtc_restore(this);
#endif
#ifdef HAVE_GAMMA_METHOD_X_RANDR
case GAMMA_METHOD_X_RANDR:
return libgamma_x_randr_crtc_restore(this);
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
case GAMMA_METHOD_X_VIDMODE:
return libgamma_x_vidmode_crtc_restore(this);
#endif
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
case GAMMA_METHOD_LINUX_DRM:
return libgamma_linux_drm_crtc_restore(this);
#endif
#ifdef HAVE_GAMMA_METHOD_W32_GDI
case GAMMA_METHOD_W32_GDI:
return libgamma_w32_gdi_crtc_restore(this);
#endif
#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
case GAMMA_METHOD_QUARTZ_CORE_GRAPHICS:
return libgamma_quartz_cg_crtc_restore(this);
#endif
default:
return LIBGAMMA_NO_SUCH_ADJUSTMENT_METHOD;
}
}
/**
* 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_get_crtc_information(libgamma_crtc_information_t* restrict this,
libgamma_crtc_state_t* restrict crtc, int32_t fields)
{
#ifdef HAVE_NO_GAMMA_METHODS
(void) this;
(void) fields;
#endif
switch (crtc->partition->site->method)
{
#ifdef HAVE_GAMMA_METHOD_DUMMY
case GAMMA_METHOD_DUMMY:
return libgamma_dummy_get_crtc_information(this, crtc, fields);
#endif
#ifdef HAVE_GAMMA_METHOD_X_RANDR
case GAMMA_METHOD_X_RANDR:
return libgamma_x_randr_get_crtc_information(this, crtc, fields);
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
case GAMMA_METHOD_X_VIDMODE:
return libgamma_x_vidmode_get_crtc_information(this, crtc, fields);
#endif
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
case GAMMA_METHOD_LINUX_DRM:
return libgamma_linux_drm_get_crtc_information(this, crtc, fields);
#endif
#ifdef HAVE_GAMMA_METHOD_W32_GDI
case GAMMA_METHOD_W32_GDI:
return libgamma_w32_gdi_get_crtc_information(this, crtc, fields);
#endif
#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
case GAMMA_METHOD_QUARTZ_CORE_GRAPHICS:
return libgamma_quartz_cg_get_crtc_information(this, crtc, fields);
#endif
default:
return LIBGAMMA_NO_SUCH_ADJUSTMENT_METHOD;
}
}
/**
* Release all resources in an information data structure for a CRTC
*
* @param this The CRTC information
*/
void libgamma_crtc_information_destroy(libgamma_crtc_information_t* restrict this)
{
free(this->edid);
free(this->connector_name);
}
/**
* Release all resources in an information data structure for a CRTC
* and free the data structure pointer
*
* @param this The CRTC information
*/
void libgamma_crtc_information_free(libgamma_crtc_information_t* restrict this)
{
libgamma_crtc_information_destroy(this);
free(this);
}
/**
* Convert a raw representation of an EDID to a lowercase hexadecimal representation
*
* @param edid The EDID in raw representation
* @param length The length of `edid`
* @retrun The EDID in lowercase hexadecimal representation,
* `NULL` on allocation error, `errno` will be set accordingly
*/
char* libgamma_behex_edid_lowercase(const unsigned char* restrict edid, size_t length)
{
char* out = malloc((length * 2 + 1) * sizeof(char));
size_t i;
if (out == NULL)
return NULL;
for (i = 0; i < length; i++)
{
out[i * 2 + 0] = "0123456789abcdef"[(edid[i] >> 4) & 15];
out[i * 2 + 1] = "0123456789abcdef"[(edid[i] >> 0) & 15];
}
out[length * 2] = '\0';
return out;
}
/**
* Convert a raw representation of an EDID to an uppercase hexadecimal representation
*
* @param edid The EDID in raw representation
* @param length The length of `edid`
* @retrun The EDID in uppercase hexadecimal representation,
* NULL` on allocation error, `errno` will be set accordingly
*/
char* libgamma_behex_edid_uppercase(const unsigned char* restrict edid, size_t length)
{
char* out = malloc((length * 2 + 1) * sizeof(char));
size_t i;
if (out == NULL)
return NULL;
for (i = 0; i < length; i++)
{
out[i * 2 + 0] = "0123456789ABCDEF"[(edid[i] >> 4) & 15];
out[i * 2 + 1] = "0123456789ABCDEF"[(edid[i] >> 0) & 15];
}
out[length * 2] = '\0';
return out;
}
/**
* Convert an hexadecimal representation of an EDID to a raw representation
*
* @param edid The EDID in hexadecimal representation
* @retrun The EDID in raw representation, it will be half the length
* of `edid` (the input value). `NULL` on allocation error or
* if the EDID is malformated, `errno` will be set accordingly.
*/
unsigned char* libgamma_unhex_edid(const char* restrict edid)
{
#define not_range(lower, V, upper) ((V < lower) || (upper < V))
#define is_not_hex(V) (not_range('0', V, '9') && not_range('a', V, 'f') && not_range('A', V, 'F'))
unsigned char* out = NULL;
size_t n = strlen(edid);
size_t i;
if ((n & 1))
return errno = EINVAL, NULL;
out = malloc(n / 2 * sizeof(unsigned char));
if (out == NULL)
return NULL;
for (i = 0; i < n; i++)
{
char a = edid[i * 2 + 0];
char b = edid[i * 2 + 1];
if (is_not_hex(a) || is_not_hex(b))
{
free(out);
return errno = EINVAL, NULL;
}
a = (char)((a & 15) + (a > '9' ? 9 : 0));
b = (char)((b & 15) + (b > '9' ? 9 : 0));
out[i] = (unsigned char)((a << 4) | b);
}
return out;
#undef is_hex
#undef not_range
}
/**
* 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_crtc_get_gamma_ramps(libgamma_crtc_state_t* restrict this,
libgamma_gamma_ramps_t* restrict ramps)
{
#ifdef HAVE_NO_GAMMA_METHODS
(void) ramps;
#endif
switch (this->partition->site->method)
{
#ifdef HAVE_GAMMA_METHOD_DUMMY
case GAMMA_METHOD_DUMMY:
return libgamma_dummy_crtc_get_gamma_ramps(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_X_RANDR
case GAMMA_METHOD_X_RANDR:
return libgamma_x_randr_crtc_get_gamma_ramps(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
case GAMMA_METHOD_X_VIDMODE:
return libgamma_x_vidmode_crtc_get_gamma_ramps(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
case GAMMA_METHOD_LINUX_DRM:
return libgamma_linux_drm_crtc_get_gamma_ramps(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_W32_GDI
case GAMMA_METHOD_W32_GDI:
return libgamma_w32_gdi_crtc_get_gamma_ramps(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
case GAMMA_METHOD_QUARTZ_CORE_GRAPHICS:
return libgamma_quartz_cg_crtc_get_gamma_ramps(this, ramps);
#endif
default:
return LIBGAMMA_NO_SUCH_ADJUSTMENT_METHOD;
}
}
/**
* 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_crtc_set_gamma_ramps(libgamma_crtc_state_t* restrict this,
libgamma_gamma_ramps_t ramps)
{
#ifdef HAVE_NO_GAMMA_METHODS
(void) ramps;
#endif
switch (this->partition->site->method)
{
#ifdef HAVE_GAMMA_METHOD_DUMMY
case GAMMA_METHOD_DUMMY:
return libgamma_dummy_crtc_set_gamma_ramps(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_X_RANDR
case GAMMA_METHOD_X_RANDR:
return libgamma_x_randr_crtc_set_gamma_ramps(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
case GAMMA_METHOD_X_VIDMODE:
return libgamma_x_vidmode_crtc_set_gamma_ramps(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
case GAMMA_METHOD_LINUX_DRM:
return libgamma_linux_drm_crtc_set_gamma_ramps(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_W32_GDI
case GAMMA_METHOD_W32_GDI:
return libgamma_w32_gdi_crtc_set_gamma_ramps(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
case GAMMA_METHOD_QUARTZ_CORE_GRAPHICS:
return libgamma_quartz_cg_crtc_set_gamma_ramps(this, ramps);
#endif
default:
return LIBGAMMA_NO_SUCH_ADJUSTMENT_METHOD;
}
}
/**
* 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_crtc_get_gamma_ramps32(libgamma_crtc_state_t* restrict this,
libgamma_gamma_ramps32_t* restrict ramps)
{
#ifdef HAVE_NO_GAMMA_METHODS
(void) ramps;
#endif
switch (this->partition->site->method)
{
#ifdef HAVE_GAMMA_METHOD_DUMMY
case GAMMA_METHOD_DUMMY:
return libgamma_dummy_crtc_get_gamma_ramps32(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_X_RANDR
case GAMMA_METHOD_X_RANDR:
return libgamma_x_randr_crtc_get_gamma_ramps32(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
case GAMMA_METHOD_X_VIDMODE:
return libgamma_x_vidmode_crtc_get_gamma_ramps32(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
case GAMMA_METHOD_LINUX_DRM:
return libgamma_linux_drm_crtc_get_gamma_ramps32(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_W32_GDI
case GAMMA_METHOD_W32_GDI:
return libgamma_w32_gdi_crtc_get_gamma_ramps32(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
case GAMMA_METHOD_QUARTZ_CORE_GRAPHICS:
return libgamma_quartz_cg_crtc_get_gamma_ramps32(this, ramps);
#endif
default:
return LIBGAMMA_NO_SUCH_ADJUSTMENT_METHOD;
}
}
/**
* 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_crtc_set_gamma_ramps32(libgamma_crtc_state_t* restrict this,
libgamma_gamma_ramps32_t ramps)
{
#ifdef HAVE_NO_GAMMA_METHODS
(void) ramps;
#endif
switch (this->partition->site->method)
{
#ifdef HAVE_GAMMA_METHOD_DUMMY
case GAMMA_METHOD_DUMMY:
return libgamma_dummy_crtc_set_gamma_ramps32(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_X_RANDR
case GAMMA_METHOD_X_RANDR:
return libgamma_x_randr_crtc_set_gamma_ramps32(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
case GAMMA_METHOD_X_VIDMODE:
return libgamma_x_vidmode_crtc_set_gamma_ramps32(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
case GAMMA_METHOD_LINUX_DRM:
return libgamma_linux_drm_crtc_set_gamma_ramps32(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_W32_GDI
case GAMMA_METHOD_W32_GDI:
return libgamma_w32_gdi_crtc_set_gamma_ramps32(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
case GAMMA_METHOD_QUARTZ_CORE_GRAPHICS:
return libgamma_quartz_cg_crtc_set_gamma_ramps32(this, ramps);
#endif
default:
return LIBGAMMA_NO_SUCH_ADJUSTMENT_METHOD;
}
}
/**
* 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_crtc_get_gamma_ramps64(libgamma_crtc_state_t* restrict this,
libgamma_gamma_ramps64_t* restrict ramps)
{
#ifdef HAVE_NO_GAMMA_METHODS
(void) ramps;
#endif
switch (this->partition->site->method)
{
#ifdef HAVE_GAMMA_METHOD_DUMMY
case GAMMA_METHOD_DUMMY:
return libgamma_dummy_crtc_get_gamma_ramps64(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_X_RANDR
case GAMMA_METHOD_X_RANDR:
return libgamma_x_randr_crtc_get_gamma_ramps64(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
case GAMMA_METHOD_X_VIDMODE:
return libgamma_x_vidmode_crtc_get_gamma_ramps64(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
case GAMMA_METHOD_LINUX_DRM:
return libgamma_linux_drm_crtc_get_gamma_ramps64(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_W32_GDI
case GAMMA_METHOD_W32_GDI:
return libgamma_w32_gdi_crtc_get_gamma_ramps64(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
case GAMMA_METHOD_QUARTZ_CORE_GRAPHICS:
return libgamma_quartz_cg_crtc_get_gamma_ramps64(this, ramps);
#endif
default:
return LIBGAMMA_NO_SUCH_ADJUSTMENT_METHOD;
}
}
/**
* 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_crtc_set_gamma_ramps64(libgamma_crtc_state_t* restrict this,
libgamma_gamma_ramps64_t ramps)
{
#ifdef HAVE_NO_GAMMA_METHODS
(void) ramps;
#endif
switch (this->partition->site->method)
{
#ifdef HAVE_GAMMA_METHOD_DUMMY
case GAMMA_METHOD_DUMMY:
return libgamma_dummy_crtc_set_gamma_ramps64(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_X_RANDR
case GAMMA_METHOD_X_RANDR:
return libgamma_x_randr_crtc_set_gamma_ramps64(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
case GAMMA_METHOD_X_VIDMODE:
return libgamma_x_vidmode_crtc_set_gamma_ramps64(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
case GAMMA_METHOD_LINUX_DRM:
return libgamma_linux_drm_crtc_set_gamma_ramps64(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_W32_GDI
case GAMMA_METHOD_W32_GDI:
return libgamma_w32_gdi_crtc_set_gamma_ramps64(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
case GAMMA_METHOD_QUARTZ_CORE_GRAPHICS:
return libgamma_quartz_cg_crtc_set_gamma_ramps64(this, ramps);
#endif
default:
return LIBGAMMA_NO_SUCH_ADJUSTMENT_METHOD;
}
}
/**
* 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_crtc_get_gamma_rampsf(libgamma_crtc_state_t* restrict this,
libgamma_gamma_rampsf_t* restrict ramps)
{
#ifdef HAVE_NO_GAMMA_METHODS
(void) ramps;
#endif
switch (this->partition->site->method)
{
#ifdef HAVE_GAMMA_METHOD_DUMMY
case GAMMA_METHOD_DUMMY:
return libgamma_dummy_crtc_get_gamma_rampsf(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_X_RANDR
case GAMMA_METHOD_X_RANDR:
return libgamma_x_randr_crtc_get_gamma_rampsf(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
case GAMMA_METHOD_X_VIDMODE:
return libgamma_x_vidmode_crtc_get_gamma_rampsf(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
case GAMMA_METHOD_LINUX_DRM:
return libgamma_linux_drm_crtc_get_gamma_rampsf(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_W32_GDI
case GAMMA_METHOD_W32_GDI:
return libgamma_w32_gdi_crtc_get_gamma_rampsf(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
case GAMMA_METHOD_QUARTZ_CORE_GRAPHICS:
return libgamma_quartz_cg_crtc_get_gamma_rampsf(this, ramps);
#endif
default:
return LIBGAMMA_NO_SUCH_ADJUSTMENT_METHOD;
}
}
/**
* 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_crtc_set_gamma_rampsf(libgamma_crtc_state_t* restrict this,
libgamma_gamma_rampsf_t ramps)
{
#ifdef HAVE_NO_GAMMA_METHODS
(void) ramps;
#endif
switch (this->partition->site->method)
{
#ifdef HAVE_GAMMA_METHOD_DUMMY
case GAMMA_METHOD_DUMMY:
return libgamma_dummy_crtc_set_gamma_rampsf(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_X_RANDR
case GAMMA_METHOD_X_RANDR:
return libgamma_x_randr_crtc_set_gamma_rampsf(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
case GAMMA_METHOD_X_VIDMODE:
return libgamma_x_vidmode_crtc_set_gamma_rampsf(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
case GAMMA_METHOD_LINUX_DRM:
return libgamma_linux_drm_crtc_set_gamma_rampsf(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_W32_GDI
case GAMMA_METHOD_W32_GDI:
return libgamma_w32_gdi_crtc_set_gamma_rampsf(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
case GAMMA_METHOD_QUARTZ_CORE_GRAPHICS:
return libgamma_quartz_cg_crtc_set_gamma_rampsf(this, ramps);
#endif
default:
return LIBGAMMA_NO_SUCH_ADJUSTMENT_METHOD;
}
}
/**
* 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_crtc_get_gamma_rampsd(libgamma_crtc_state_t* restrict this,
libgamma_gamma_rampsd_t* restrict ramps)
{
#ifdef HAVE_NO_GAMMA_METHODS
(void) ramps;
#endif
switch (this->partition->site->method)
{
#ifdef HAVE_GAMMA_METHOD_DUMMY
case GAMMA_METHOD_DUMMY:
return libgamma_dummy_crtc_get_gamma_rampsd(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_X_RANDR
case GAMMA_METHOD_X_RANDR:
return libgamma_x_randr_crtc_get_gamma_rampsd(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
case GAMMA_METHOD_X_VIDMODE:
return libgamma_x_vidmode_crtc_get_gamma_rampsd(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
case GAMMA_METHOD_LINUX_DRM:
return libgamma_linux_drm_crtc_get_gamma_rampsd(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_W32_GDI
case GAMMA_METHOD_W32_GDI:
return libgamma_w32_gdi_crtc_get_gamma_rampsd(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
case GAMMA_METHOD_QUARTZ_CORE_GRAPHICS:
return libgamma_quartz_cg_crtc_get_gamma_rampsd(this, ramps);
#endif
default:
return LIBGAMMA_NO_SUCH_ADJUSTMENT_METHOD;
}
}
/**
* 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_crtc_set_gamma_rampsd(libgamma_crtc_state_t* restrict this,
libgamma_gamma_rampsd_t ramps)
{
#ifdef HAVE_NO_GAMMA_METHODS
(void) ramps;
#endif
switch (this->partition->site->method)
{
#ifdef HAVE_GAMMA_METHOD_DUMMY
case GAMMA_METHOD_DUMMY:
return libgamma_dummy_crtc_set_gamma_rampsd(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_X_RANDR
case GAMMA_METHOD_X_RANDR:
return libgamma_x_randr_crtc_set_gamma_rampsd(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_X_VIDMODE
case GAMMA_METHOD_X_VIDMODE:
return libgamma_x_vidmode_crtc_set_gamma_rampsd(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_LINUX_DRM
case GAMMA_METHOD_LINUX_DRM:
return libgamma_linux_drm_crtc_set_gamma_rampsd(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_W32_GDI
case GAMMA_METHOD_W32_GDI:
return libgamma_w32_gdi_crtc_set_gamma_rampsd(this, ramps);
#endif
#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
case GAMMA_METHOD_QUARTZ_CORE_GRAPHICS:
return libgamma_quartz_cg_crtc_set_gamma_rampsd(this, ramps);
#endif
default:
return LIBGAMMA_NO_SUCH_ADJUSTMENT_METHOD;
}
}
/**
* Set the gamma ramps for a CRTC, 16-bit gamma-depth function version
*
* Note that this will probably involve the library allocating temporary data
*
* @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_crtc_set_gamma_ramps_f(libgamma_crtc_state_t* restrict this,
libgamma_gamma_ramps_fun* red_function,
libgamma_gamma_ramps_fun* green_function,
libgamma_gamma_ramps_fun* blue_function)
{
libgamma_crtc_information_t info;
libgamma_gamma_ramps_t ramps;
size_t i, n;
int e;
if (libgamma_get_crtc_information(&info, this, CRTC_INFO_GAMMA_SIZE))
{
e = info.gamma_size_error;
if (e < 0)
return e;
return errno = e, LIBGAMMA_ERRNO_SET;
}
n = ramps. red_size = info. red_gamma_size;
n += ramps.green_size = info.green_gamma_size;
n += ramps. blue_size = info. blue_gamma_size;
ramps. red = malloc(n * sizeof(uint16_t));
ramps.green = ramps. red + ramps. red_size;
ramps. blue = ramps.green + ramps.green_size;
if (ramps.red == NULL)
return LIBGAMMA_ERRNO_SET;
for (i = 0, n = ramps.red_size; i < n; i++)
ramps.red[i] = red_function((float)i / (float)(n - 1));
for (i = 0, n = ramps.green_size; i < n; i++)
ramps.green[i] = green_function((float)i / (float)(n - 1));
for (i = 0, n = ramps.blue_size; i < n; i++)
ramps.blue[i] = blue_function((float)i / (float)(n - 1));
e = libgamma_crtc_set_gamma_ramps(this, ramps);
free(ramps.red);
return e;
}
/**
* Set the gamma ramps for a CRTC, 32-bit gamma-depth function version
*
* Note that this will probably involve the library allocating temporary data
*
* @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_crtc_set_gamma_ramps32_f(libgamma_crtc_state_t* restrict this,
libgamma_gamma_ramps32_fun* red_function,
libgamma_gamma_ramps32_fun* green_function,
libgamma_gamma_ramps32_fun* blue_function)
{
libgamma_crtc_information_t info;
libgamma_gamma_ramps32_t ramps;
size_t i, n;
int e;
if (libgamma_get_crtc_information(&info, this, CRTC_INFO_GAMMA_SIZE))
{
e = info.gamma_size_error;
if (e < 0)
return e;
return errno = e, LIBGAMMA_ERRNO_SET;
}
n = ramps. red_size = info. red_gamma_size;
n += ramps.green_size = info.green_gamma_size;
n += ramps. blue_size = info. blue_gamma_size;
ramps. red = malloc(n * sizeof(uint32_t));
ramps.green = ramps. red + ramps. red_size;
ramps. blue = ramps.green + ramps.green_size;
if (ramps.red == NULL)
return LIBGAMMA_ERRNO_SET;
for (i = 0, n = ramps.red_size; i < n; i++)
ramps.red[i] = red_function((float)i / (float)(n - 1));
for (i = 0, n = ramps.green_size; i < n; i++)
ramps.green[i] = green_function((float)i / (float)(n - 1));
for (i = 0, n = ramps.blue_size; i < n; i++)
ramps.blue[i] = blue_function((float)i / (float)(n - 1));
e = libgamma_crtc_set_gamma_ramps32(this, ramps);
free(ramps.red);
return e;
}
/**
* Set the gamma ramps for a CRTC, 64-bit gamma-depth function version
*
* Note that this will probably involve the library allocating temporary data
*
* @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_crtc_set_gamma_ramps64_f(libgamma_crtc_state_t* restrict this,
libgamma_gamma_ramps64_fun* red_function,
libgamma_gamma_ramps64_fun* green_function,
libgamma_gamma_ramps64_fun* blue_function)
{
libgamma_crtc_information_t info;
libgamma_gamma_ramps64_t ramps;
size_t i, n;
int e;
if (libgamma_get_crtc_information(&info, this, CRTC_INFO_GAMMA_SIZE))
{
e = info.gamma_size_error;
if (e < 0)
return e;
return errno = e, LIBGAMMA_ERRNO_SET;
}
n = ramps. red_size = info. red_gamma_size;
n += ramps.green_size = info.green_gamma_size;
n += ramps. blue_size = info. blue_gamma_size;
ramps. red = malloc(n * sizeof(uint64_t));
ramps.green = ramps. red + ramps. red_size;
ramps. blue = ramps.green + ramps.green_size;
if (ramps.red == NULL)
return LIBGAMMA_ERRNO_SET;
for (i = 0, n = ramps.red_size; i < n; i++)
ramps.red[i] = red_function((float)i / (float)(n - 1));
for (i = 0, n = ramps.green_size; i < n; i++)
ramps.green[i] = green_function((float)i / (float)(n - 1));
for (i = 0, n = ramps.blue_size; i < n; i++)
ramps.blue[i] = blue_function((float)i / (float)(n - 1));
e = libgamma_crtc_set_gamma_ramps64(this, ramps);
free(ramps.red);
return e;
}
/**
* Set the gamma ramps for a CRTC, `float` function version
*
* Note that this will probably involve the library allocating temporary data
*
* @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_crtc_set_gamma_rampsf_f(libgamma_crtc_state_t* restrict this,
libgamma_gamma_rampsf_fun* red_function,
libgamma_gamma_rampsf_fun* green_function,
libgamma_gamma_rampsf_fun* blue_function)
{
libgamma_crtc_information_t info;
libgamma_gamma_rampsf_t ramps;
size_t i, n;
int e;
if (libgamma_get_crtc_information(&info, this, CRTC_INFO_GAMMA_SIZE))
{
e = info.gamma_size_error;
if (e < 0)
return e;
return errno = e, LIBGAMMA_ERRNO_SET;
}
n = ramps. red_size = info. red_gamma_size;
n += ramps.green_size = info.green_gamma_size;
n += ramps. blue_size = info. blue_gamma_size;
ramps. red = malloc(n * sizeof(float));
ramps.green = ramps. red + ramps. red_size;
ramps. blue = ramps.green + ramps.green_size;
if (ramps.red == NULL)
return LIBGAMMA_ERRNO_SET;
for (i = 0, n = ramps.red_size; i < n; i++)
ramps.red[i] = red_function((float)i / (float)(n - 1));
for (i = 0, n = ramps.green_size; i < n; i++)
ramps.green[i] = green_function((float)i / (float)(n - 1));
for (i = 0, n = ramps.blue_size; i < n; i++)
ramps.blue[i] = blue_function((float)i / (float)(n - 1));
e = libgamma_crtc_set_gamma_rampsf(this, ramps);
free(ramps.red);
return e;
}
/**
* Set the gamma ramps for a CRTC, `double` function version
*
* Note that this will probably involve the library allocating temporary data
*
* @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_crtc_set_gamma_rampsd_f(libgamma_crtc_state_t* restrict this,
libgamma_gamma_rampsd_fun* red_function,
libgamma_gamma_rampsd_fun* green_function,
libgamma_gamma_rampsd_fun* blue_function)
{
libgamma_crtc_information_t info;
libgamma_gamma_rampsd_t ramps;
size_t i, n;
int e;
if (libgamma_get_crtc_information(&info, this, CRTC_INFO_GAMMA_SIZE))
{
e = info.gamma_size_error;
if (e < 0)
return e;
return errno = e, LIBGAMMA_ERRNO_SET;
}
n = ramps. red_size = info. red_gamma_size;
n += ramps.green_size = info.green_gamma_size;
n += ramps. blue_size = info. blue_gamma_size;
ramps. red = malloc(n * sizeof(double));
ramps.green = ramps. red + ramps. red_size;
ramps. blue = ramps.green + ramps.green_size;
if (ramps.red == NULL)
return LIBGAMMA_ERRNO_SET;
for (i = 0, n = ramps.red_size; i < n; i++)
ramps.red[i] = red_function((double)i / (double)(n - 1));
for (i = 0, n = ramps.green_size; i < n; i++)
ramps.green[i] = green_function((double)i / (double)(n - 1));
for (i = 0, n = ramps.blue_size; i < n; i++)
ramps.blue[i] = blue_function((double)i / (double)(n - 1));
e = libgamma_crtc_set_gamma_rampsd(this, ramps);
free(ramps.red);
return e;
}
#ifdef HAVE_NO_GAMMA_METHODS
# pragma GCC diagnostic pop
#endif