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Diffstat (limited to 'src/lib/gamma-x-vidmode.h')
| -rw-r--r-- | src/lib/gamma-x-vidmode.h | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/src/lib/gamma-x-vidmode.h b/src/lib/gamma-x-vidmode.h new file mode 100644 index 0000000..8378726 --- /dev/null +++ b/src/lib/gamma-x-vidmode.h @@ -0,0 +1,162 @@ +/** + * 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_VIDMODE_H +#define LIBGAMMA_GAMMA_X_VIDMODE_H + +#ifndef HAVE_LIBGAMMA_METHOD_X_VIDMODE +# error Including gamma-x-vidmode.h without HAVE_LIBGAMMA_METHOD_X_VIDMODE +#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_vidmode_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_vidmode_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_vidmode_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_vidmode_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_vidmode_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_vidmode_partition_destroy(libgamma_partition_state_t* restrict this) __attribute__((const)); + +/** + * 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_vidmode_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_vidmode_crtc_initialise(libgamma_crtc_state_t* restrict this, + libgamma_partition_state_t* restrict partition, size_t crtc) __attribute__((const)); + +/** + * Release all resources held by a CRTC state. + * + * @param this The CRTC state. + */ +void libgamma_x_vidmode_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_vidmode_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_vidmode_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_vidmode_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_vidmode_crtc_set_gamma_ramps(libgamma_crtc_state_t* restrict this, + libgamma_gamma_ramps_t ramps); + + +#endif + |