/** * 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 <http://www.gnu.org/licenses/>. */ #ifndef LIBGAMMA_GAMMA_W32_GDI_H #define LIBGAMMA_GAMMA_W32_GDI_H #ifndef HAVE_LIBGAMMA_METHOD_W32_GDI # error Including gamma-w32-gdi.h without HAVE_LIBGAMMA_METHOD_W32_GDI #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_w32_gdi_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_w32_gdi_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_w32_gdi_site_destroy(libgamma_site_state_t* restrict this) __attribute__((const)); /** * 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_w32_gdi_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_w32_gdi_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_w32_gdi_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_w32_gdi_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_w32_gdi_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_w32_gdi_crtc_destroy(libgamma_crtc_state_t* restrict 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_w32_gdi_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_w32_gdi_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_w32_gdi_crtc_get_gamma_ramps16(libgamma_crtc_state_t* restrict this, libgamma_gamma_ramps16_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_w32_gdi_crtc_set_gamma_ramps16(libgamma_crtc_state_t* restrict this, libgamma_gamma_ramps16_t ramps); #endif