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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-helper.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>
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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_HELPER_H
-#define LIBGAMMA_GAMMA_HELPER_H
-
-
-#include "libgamma-method.h"
-
-
-/**
- * Gamma ramp structure union for different depths.
- */
-typedef union libgamma_gamma_ramps_any
-{
- /**
- * 16-bit gamma ramps.
- */
- libgamma_gamma_ramps_t bits16;
-
- /**
- * 32-bit gamma ramps.
- */
- libgamma_gamma_ramps32_t bits32;
-
- /**
- * 64-bit gamma ramps.
- */
- libgamma_gamma_ramps64_t bits64;
-
- /**
- * Single precision float gamma ramps.
- */
- libgamma_gamma_rampsf_t float_single;
-
- /**
- * Double precision float gamma ramps.
- */
- libgamma_gamma_rampsd_t float_double;
-
-} libgamma_gamma_ramps_any_t;
-
-
-/**
- * A function for reading the gamma ramps from a CRTC.
- *
- * @param this The CRTC state.
- * @param ramps The store for the gamma ramps.
- * @return Zero on success, otherwise (negative) the value of an
- * error identifier provided by this library.
- */
-typedef int libgamma_get_ramps_any_fun(libgamma_crtc_state_t* restrict this,
- libgamma_gamma_ramps_any_t* restrict ramps);
-
-/**
- * A function for writing the gamma ramps to a CRTC.
- *
- * @param this The CRTC state.
- * @param ramps The gamma ramps.
- * @return Zero on success, otherwise (negative) the value of an
- * error identifier provided by this library.
- */
-typedef int libgamma_set_ramps_any_fun(libgamma_crtc_state_t* restrict this,
- libgamma_gamma_ramps_any_t ramps);
-
-
-
-/**
- * Get current the gamma ramps for a CRTC, re-encoding versio.n
- *
- * @param this The CRTC state.
- * @param ramps The gamma ramps to fill with the current values.
- * @param depth_user The depth of the gamma ramps that are provided by the user,
- * `-1` for `float`, `-2` for `double`.
- * @param depth_system The depth of the gamma ramps as required by the adjustment method,
- * `-1` for `float`, `-2` for `double`.
- * @param fun Function that is to be used read the ramps, its parameters have
- * the same function as those of this function with the same names,
- * and the return value too is identical.
- * @return Zero on success, otherwise (negative) the value of an
- * error identifier provided by this library.
- */
-#define libgamma_translated_ramp_get(this, ramps, depth_user, depth_system, fun) \
- libgamma_translated_ramp_get_(this, ramps, depth_user, depth_system, \
- (libgamma_get_ramps_any_fun*)(fun))
-
-
-/**
- * Set the gamma ramps for a CRTC, re-encoding version
- *
- * @param this The CRTC state.
- * @param ramps The gamma ramps to apply.
- * @param depth_user The depth of the gamma ramps that are provided by the user,
- * `-1` for `float`, `-2` for `double`.
- * @param depth_system The depth of the gamma ramps as required by the adjustment method,
- * `-1` for `float`, `-2` for `double`.
- * @param fun Function that is to be used write the ramps, its parameters have
- * the same function as those of this function with the same names,
- * and the return value too is identical.
- * @return Zero on success, otherwise (negative) the value of an
- * error identifier provided by this library.
- */
-#define libgamma_translated_ramp_set(this, ramps, depth_user, depth_system, fun) \
- libgamma_translated_ramp_set_(this, ramps, depth_user, depth_system, \
- (libgamma_set_ramps_any_fun*)(fun))
-
-
-/**
- * Get current the gamma ramps for a CRTC, re-encoding version.
- *
- * @param this The CRTC state.
- * @param ramps The gamma ramps to fill with the current values.
- * @param depth_user The depth of the gamma ramps that are provided by the user,
- * `-1` for `float`, `-2` for `double`.
- * @param depth_system The depth of the gamma ramps as required by the adjustment method,
- * `-1` for `float`, `-2` for `double`.
- * @param fun Function that is to be used read the ramps, its parameters have
- * the same function as those of this function with the same names,
- * and the return value too is identical.
- * @return Zero on success, otherwise (negative) the value of an
- * error identifier provided by this library.
- */
-int libgamma_translated_ramp_get_(libgamma_crtc_state_t* restrict this,
- libgamma_gamma_ramps_any_t* restrict ramps,
- signed depth_user, signed depth_system,
- libgamma_get_ramps_any_fun* fun);
-
-
-/**
- * Set the gamma ramps for a CRTC, re-encoding version.
- *
- * @param this The CRTC state.
- * @param ramps The gamma ramps to apply.
- * @param depth_user The depth of the gamma ramps that are provided by the user,
- * `-1` for `float`, `-2` for `double`.
- * @param depth_system The depth of the gamma ramps as required by the adjustment method,
- * `-1` for `float`, `-2` for `double`.
- * @param fun Function that is to be used write the ramps, its parameters have
- * the same function as those of this function with the same names,
- * and the return value too is identical.
- * @return Zero on success, otherwise (negative) the value of an
- * error identifier provided by this library.
- */
-int libgamma_translated_ramp_set_(libgamma_crtc_state_t* restrict this,
- libgamma_gamma_ramps_any_t ramps,
- signed depth_user, signed depth_system,
- libgamma_set_ramps_any_fun* fun);
-
-
-#endif
-