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authorMattias Andrée <maandree@operamail.com>2014-05-31 07:32:09 +0200
committerMattias Andrée <maandree@operamail.com>2014-05-31 07:32:09 +0200
commitbdeb7f77f16b1e482904866ff21e43f8bfc01bb0 (patch)
treee5587a577db53a58ea52fd2579fa0cbb89007491 /src/gamma-x-randr.h
parentsplit out error identification for failure of open from libgamma_linux_drm_partition_initialise (diff)
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Signed-off-by: Mattias Andrée <maandree@operamail.com>
Diffstat (limited to 'src/gamma-x-randr.h')
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diff --git a/src/gamma-x-randr.h b/src/gamma-x-randr.h
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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_RANDR_H
-#define LIBGAMMA_GAMMA_X_RANDR_H
-
-#ifndef HAVE_LIBGAMMA_METHOD_X_RANDR
-# error Including gamma-x-randr.h without HAVE_LIBGAMMA_METHOD_X_RANDR
-#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_randr_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_randr_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_randr_site_destroy(libgamma_site_state_t* restrict this);
-
-/**
- * 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_x_randr_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_randr_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_randr_partition_destroy(libgamma_partition_state_t* restrict this);
-
-/**
- * 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_x_randr_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_randr_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_randr_crtc_destroy(libgamma_crtc_state_t* restrict this) __attribute__((const));
-
-/**
- * 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_randr_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_randr_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_randr_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_randr_crtc_set_gamma_ramps(libgamma_crtc_state_t* restrict this,
- libgamma_gamma_ramps_t ramps);
-
-
-#endif
-