diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/libgamma-error.h | 26 | ||||
| -rw-r--r-- | src/libgamma-facade.h | 305 | ||||
| -rw-r--r-- | src/libgamma-method.h | 733 | ||||
| -rw-r--r-- | src/libgamma.h | 28 |
4 files changed, 1092 insertions, 0 deletions
diff --git a/src/libgamma-error.h b/src/libgamma-error.h new file mode 100644 index 0000000..bd17097 --- /dev/null +++ b/src/libgamma-error.h @@ -0,0 +1,26 @@ +/** + * 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_ERROR_H +#define LIBGAMMA_ERROR_H + + +/* TODO: Fill with error values (they should be negative.) */ + + +#endif + diff --git a/src/libgamma-facade.h b/src/libgamma-facade.h new file mode 100644 index 0000000..77b0a3a --- /dev/null +++ b/src/libgamma-facade.h @@ -0,0 +1,305 @@ +/** + * 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_FACADE_H +#define LIBGAMMA_FACADE_H + + +#include "libgamma-method.h" + +#include <stddef.h> +#include <stdint.h> + + +/** + * 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* this, int method); + +/** + * 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); + +/** + * 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); + + +/** + * 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. + * @return Zero on success, otherwise (negative) the value of an + * error identifier provided by this library + */ +int libgamma_site_initialise(libgamma_site_state_t* this, + int method, char* site); + +/** + * Release all resources held by a site state + * + * @param this The site state + */ +void libgamma_site_destroy(libgamma_site_state_t* this); + +/** + * 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* 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* 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_partition_initialise(libgamma_partition_state_t* this, + libgamma_site_state_t* site, size_t partition); + +/** + * Release all resources held by a partition state + * + * @param this The partition state + */ +void libgamma_partition_destroy(libgamma_partition_state_t* this); + +/** + * 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* 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_site_state_t* 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_crtc_initialise(libgamma_crtc_state_t* this, + libgamma_partition_state_t* partition, size_t crtc); + +/** + * Release all resources held by a CRTC state + * + * @param this The CRTC state + */ +void libgamma_crtc_destroy(libgamma_crtc_state_t* this); + +/** + * 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* 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_site_state_t* 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 field 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* this, + libgamma_crtc_state_t* crtc, int32_t field); + +/** + * Release all resources in an information data structure for a CRTC + * + * @param this The CRTC information + */ +int libgamma_crtc_information_destroy(libgamma_crtc_information_t* this); + +/** + * Release all resources in an information data structure for a CRTC + * and free the data structure pointer + * + * @param this The CRTC information + */ +int libgamma_crtc_information_free(libgamma_crtc_information_t* this); + +/** + * Convert a raw representation of an EDID to a lowercase hexadecimal representation + * + * @param edid:const unsigned char* The EDID in raw representation + * @param length:size_t The length of `edid` + * @return :char* The EDID in lowercase hexadecimal representation, + * `NULL` on allocation error, `errno` will be set accordingly + */ +#define libgamma_behex_edid(edid, length) \ + libgamma_behex_edid_lowercase(edid, length) + +/** + * 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* edid, size_t length); + +/** + * 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* edid, size_t length); + +/** + * 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 twice the length + * of `edid` (the input value). `NULL` on allocation error, + * `errno` will be set accordingly. + */ +unsigned char* libgamma_unhex_edid(const char* edid); + + +/** + * Set the gamma ramps for a CRTC, 16-bit gamma-depth version + * + * @param this The CRTC state + * @parma 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* this, libgamma_gamma_ramps_t ramps); + +/** + * Get current the gamma ramps for a CRTC, 16-bit gamma-depth version + * + * @param this The CRTC state + * @parma 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* this, libgamma_gamma_ramps_t* ramps); + + +/** + * Set the gamma ramps for a CRTC, 32-bit gamma-depth version + * + * @param this The CRTC state + * @parma 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* this, libgamma_gamma_ramps32_t ramps); + +/** + * Get current the gamma ramps for a CRTC, 32-bit gamma-depth version + * + * @param this The CRTC state + * @parma 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* this, libgamma_gamma_ramps32_t* ramps); + + +/** + * Set the gamma ramps for a CRTC, 64-bit gamma-depth version + * + * @param this The CRTC state + * @parma 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* this, libgamma_gamma_ramps64_t ramps); + +/** + * Get current the gamma ramps for a CRTC, 64-bit gamma-depth version + * + * @param this The CRTC state + * @parma 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* this, libgamma_gamma_ramps64_t* ramps); + + +#endif + diff --git a/src/libgamma-method.h b/src/libgamma-method.h new file mode 100644 index 0000000..256b1f0 --- /dev/null +++ b/src/libgamma-method.h @@ -0,0 +1,733 @@ +/** + * 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_METHOD_H +#define LIBGAMMA_METHOD_H + + +#include <stddef.h> +#include <stdint.h> + + + +/** + * The identifier for the dummy adjustment method. + * This method can be configured and is useful for + * testing your program's ability to handle errors. + */ +#ifdef HAVE_GAMMA_METHOD_DUMMY +# define GAMMA_METHOD_DUMMY 0 +#endif + +/** + * The identifier for the adjustment method with + * uses the RandR protocol under the X display server. + */ +#ifdef HAVE_GAMMA_METHOD_X_RANDR +# define GAMMA_METHOD_X_RANDR 1 +#endif + +/** + * The identifier for the adjustment method with + * uses the VidMode protocol under the X display server. + * This is an older alternative to RandR that can + * [not verified] work on some drivers that are not + * supported by RandR, however it can only control the + * primary CRTC per screen (partition). + */ +#ifdef HAVE_GAMMA_METHOD_X_VIDMODE +# define GAMMA_METHOD_X_VIDMODE 2 +#endif + +/** + * The identifier for the Direct Rendering Manager + * adjustment method that is available in Linux + * (built in to the Linux kernel with a userland + * library for access) and is a part of the + * Direct Rendering Infrastructure. This adjustment + * method all work when you are in non-graphical + * mode; however a display server cannnot be + * started while this is running, but it can be + * started while a display server is running. + */ +#ifdef HAVE_GAMMA_METHOD_LINUX_DRM +# define GAMMA_METHOD_LINUX_DRM 3 +#endif + +/** + * The identifier for the Graphics Device Interface + * adjustment method that is available in Windows. + * This method is not well tested; it can be compiled + * to be available under X.org using a translation layer. + */ +#ifdef HAVE_GAMMA_METHOD_W32_GDI +# define GAMMA_METHOD_W32_GDI 4 +#endif + +/** + * The identifier for the Core Graphics adjustment + * method that is available in Mac OS X that can + * adjust gamma ramps under the Quartz display server. + * This method is not well tested; it can be compiled + * to be available under X.org using a translation layer. + */ +#ifdef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS +# define GAMMA_METHOD_QUARTZ_CORE_GRAPHICS 5 +#endif + + +/** + * The index of the last gamma method, neither it + * nor any index before it may actually be supported + * as it could have been disabled at compile-time + */ +#define GAMMA_METHOD_MAX 5 + + + +/** + * Capabilities of adjustment methods + */ +typedef struct libgamma_method_capabilities { + + /** + * OR of the CRTC information fields in `libgamma_crtc_information_t` + * that may (but can fail) be read successfully + */ + int32_t crtc_information; + + /** + * Whether the default site is known, if true the site is integrated + * to the system or can be determined using environment variables + */ + int default_site_known : 1; + + /** + * Whether the adjustment method supports multiple sites rather + * than just the default site + */ + int multiple_sites : 1; + + /** + * Whether the adjustment method supports multiple partitions + * per site + */ + int multiple_partitions : 1; + + /** + * Whether the adjustment method supports multiple CRTC:s + * per partition per site + */ + int multiple_crtcs : 1; + + /** + * Whether the adjustment method supports `libgamma_site_restore` + */ + int site_restore : 1; + + /** + * Whether the adjustment method supports `libgamma_partition_restore` + */ + int partition_restore : 1; + + /** + * Whether the adjustment method supports `libgamma_crtc_restore` + */ + int crtc_restore : 1; + + /** + * Whether the `gamma_size` field in `libgamma_crtc_information_t` + * will always be filled with the same value for the adjustment method + */ + int fixed_gamma_size : 1; + + /** + * Whether the `gamma_depth` field in `libgamma_crtc_information_t` + * will always be filled with the same value for the adjustment method + */ + int fixed_gamma_depth : 1; + + /** + * Whether the adjustment method will actually perform adjustments + */ + int real : 1; + + /** + * Whether the adjustment method is implement using a translation layer + */ + int fake : 1; + +} libgamma_method_capabilities_t; + + +/** + * Site state + * + * On operating systems that integrate a graphical environment + * there is usally just one site. However, one systems with + * pluggable graphics, like Unix-like systems such as GNU/Linux + * and the BSD:s, there can usually be any (feasible) number of + * sites. In X.org parlance they are called displays. + */ +typedef struct libgamma_site_state { + + /** + * Adjustment method implementation specific data. + * You as a user of this library should not touch this. + */ + void* data; + + /** + * This field specifies, for the methods if this library, + * which adjustment method (display server and protocol) + * is used to adjust the gamma ramps. + */ + int method; + + /** + * The site identifier. It can either be `NULL` or a string. + * `NULL` indicates the default site. On systems like the + * Unix-like systems, where the graphics are pluggable, this + * is usally resolved by an environment variable, such as + * "DISPLAY" for X.org. + */ + char* site; + + /** + * The number of partitions that is available on this site. + * Probably the majority of display server only one partition + * per site. However, X.org can, and traditional used to have + * on multi-headed environments, multiple partitions per site. + * In X.org partitions are called 'screens'. It is not to be + * confused with monitor. A screen is a collection of monitors, + * and the mapping from monitors to screens is a surjection. + * On hardware-level adjustment methods, such as Direct + * Rendering Manager, a partition is a graphics card. + */ + size_t partitions_available; + +} libgamma_site_state_t; + + +/** + * Partition state + * + * Probably the majority of display server only one partition + * per site. However, X.org can, and traditional used to have + * on multi-headed environments, multiple partitions per site. + * In X.org partitions are called 'screens'. It is not to be + * confused with monitor. A screen is a collection of monitors, + * and the mapping from monitors to screens is a surjection. + * On hardware-level adjustment methods, such as Direct + * Rendering Manager, a partition is a graphics card. + */ +typedef struct libgamma_partition_state { + + /** + * Adjustment method implementation specific data. + * You as a user of this library should not touch this. + */ + void* data; + + /** + * The site this partition belongs to + */ + libgamma_site_state_t* site; + + /** + * The index of the partition + */ + size_t partition; + + /** + * The number of CRTC:s that are available under this + * partition. Note that the CRTC:s are not necessarily + * online. + */ + size_t crtcs_available; + +} libgamma_partition_state_t; + + +/** + * Cathode ray tube controller state + * + * The CRTC controls the gamma ramps for the + * monitor that is plugged in to the connector + * that the CRTC belongs to + */ +typedef struct libgamma_crtc_state { + + /** + * Adjustment method implementation specific data. + * You as a user of this library should not touch this. + */ + void* data; + + /** + * The partition this CRTC belongs to + */ + libgamma_partition_state_t* site; + + /** + * The index of the CRTC within its partition. + */ + size_t crtc; + +} libgamma_crtc_state_t; + + + +/** + * For a `libgamma_crtc_information_t` fill in the + * values for `edid` and `edid_length` and report errors to `edid_error` + */ +#define CRTC_INFO_EDID (1 << 0) + +/** + * For a `libgamma_crtc_information_t` fill in the + * value for `width_mm` and report errors to `width_mm_error` + */ +#define CRTC_INFO_WIDTH_MM (1 << 1) + +/** + * For a `libgamma_crtc_information_t` fill in the + * value for `height_mm` and report errors to `height_mm_error` + */ +#define CRTC_INFO_HEIGHT_MM (1 << 2) + +/** + * For a `libgamma_crtc_information_t` fill in the + * value for `width_mm_edid` and report errors to `width_mm_edid_error` + */ +#define CRTC_INFO_WIDTH_MM_EDID (1 << 3) + +/** + * For a `libgamma_crtc_information_t` fill in the + * value for `height_mm_edid` and report errors to `height_mm_edid_error` + */ +#define CRTC_INFO_HEIGHT_MM_EDID (1 << 4) + +/** + * For a `libgamma_crtc_information_t` fill in the + * value for `gamma_size` and report errors to `gamma_size_error` + */ +#define CRTC_INFO_GAMMA_SIZE (1 << 5) + +/** + * For a `libgamma_crtc_information_t` fill in the + * value for `gamma_depth` and report errors to `gamma_depth_error` + */ +#define CRTC_INFO_GAMMA_DEPTH (1 << 6) + +/** + * For a `libgamma_crtc_information_t` fill in the + * value for `gamma_support` and report errors to `gamma_support_error` + */ +#define CRTC_INFO_GAMMA_SUPPORT (1 << 7) + +/** + * For a `libgamma_crtc_information_t` fill in the + * value for `subpixel_order` and report errors to `subpixel_order_error` + */ +#define CRTC_INFO_SUBPIXEL_ORDER (1 << 8) + +/** + * For a `libgamma_crtc_information_t` fill in the + * value for `active` and report errors to `active_error` + */ +#define CRTC_INFO_ACTIVE (1 << 9) + +/** + * For a `libgamma_crtc_information_t` fill in the + * value for `connector_name` and report errors to `connector_name_error` + */ +#define CRTC_INFO_CONNECTOR_NAME (1 << 10) + +/** + * For a `libgamma_crtc_information_t` fill in the + * value for `connector_type` and report errors to `connector_type_error` + */ +#define CRTC_INFO_CONNECTOR_TYPE (1 << 11) + +/** + * For a `libgamma_crtc_information_t` fill in the + * values for `gamma_red`, `gamma_green` and `gamma_blue` + * and report errors to `connector_type_error` + */ +#define CRTC_INFO_GAMMA (1 << 12) + + +/** + * Cathode ray tube controller information data structure + */ +typedef struct libgamma_crtc_information { + + /** + * The Extended Display Identification Data associated with + * the attached monitor. This is raw byte array that is usually + * 128 bytes long. It is not NUL-terminate, rather its length + * is stored in `edid_size`. + */ + unsigned char* edid; + + /** + * The length of `edid` + */ + size_t edid_length; + + /** + * Zero on success, positive it holds the value `errno` had + * when the reading failed, otherwise (negative) the value + * of an error identifier provided by this library + */ + int edid_error; + + + /** + * The phyical width, in millimetres, of the viewport of the + * attached monitor, as reported by the adjustment method. This + * value may be incorrect, which is a known issue with the X + * server where it is the result of the X server attempting + * the estimate the size on its own. + * Zero means that its is not applicable, which is the case + * for projectors. + */ + size_t width_mm; + + /** + * Zero on success, positive it holds the value `errno` had + * when the reading failed, otherwise (negative) the value + * of an error identifier provided by this library + */ + int width_mm_error; + + + /** + * The phyical height, in millimetres, of the viewport of the + * attached monitor, as reported by the adjustment method. This + * value may be incorrect, which is a known issue with the X + * server where it is the result of the X server attempting + * the estimate the size on its own. + * Zero means that its is not applicable, which is the case + * for projectors. + */ + size_t height_mm; + + /** + * Zero on success, positive it holds the value `errno` had + * when the reading failed, otherwise (negative) the value + * of an error identifier provided by this library + */ + int height_mm_error; + + + /** + * The phyical width, in millimetres, of the viewport of the + * attached monitor, as reported by it the monitor's Extended + * Display Information Data. This value can only contain whole + * centimetres, which means that the result is always zero + * modulus ten. However, this could change with revisions of + * the EDID structure. + * Zero means that its is not applicable, which is the case + * for projectors. + */ + size_t width_mm_edid; + + /** + * Zero on success, positive it holds the value `errno` had + * when the reading failed, otherwise (negative) the value + * of an error identifier provided by this library + */ + int width_mm_edid_error; + + + /** + * The phyical height, in millimetres, of the viewport of the + * attached monitor, as reported by it the monitor's Extended + * Display Information Data. This value can only contain whole + * centimetres, which means that the result is always zero + * modulus ten. However, this could change with revisions of + * the EDID structure. + * Zero means that its is not applicable, which is the case + * for projectors. + */ + size_t height_mm_edid; + + /** + * Zero on success, positive it holds the value `errno` had + * when the reading failed, otherwise (negative) the value + * of an error identifier provided by this library + */ + int height_mm_edid_error; + + + /** + * The size of the encoding axes of gamma ramps + */ + size_t gamma_size; + + /** + * Zero on success, positive it holds the value `errno` had + * when the reading failed, otherwise (negative) the value + * of an error identifier provided by this library + */ + int gamma_size_error; + + + /** + * The bit-depth of the value axes of gamma ramps + */ + size_t gamma_depth; + + /** + * Zero on success, positive it holds the value `errno` had + * when the reading failed, otherwise (negative) the value + * of an error identifier provided by this library + */ + int gamma_depth_error; + + + /** + * Non-zero gamma ramp adjustments are supported + */ + int gamma_support; + + /** + * Zero on success, positive it holds the value `errno` had + * when the reading failed, otherwise (negative) the value + * of an error identifier provided by this library + */ + int gamma_support_error; + + + /** + * The layout of the subpixels. + * You cannot count on this value, but it is provided + * anyway as a means of distinguishing monitors. + */ + int subpixel_order; + + /** + * Zero on success, positive it holds the value `errno` had + * when the reading failed, otherwise (negative) the value + * of an error identifier provided by this library + */ + int subpixel_order_error; + + + /** + * Whether there is a monitors connected to the CRTC + */ + int active; + + /** + * Zero on success, positive it holds the value `errno` had + * when the reading failed, otherwise (negative) the value + * of an error identifier provided by this library + */ + int active_error; + + + /** + * The name of the connector as designated by the display + * server or as give by this library in case the display + * server lacks this feature + */ + char* connector_name; + + /** + * Zero on success, positive it holds the value `errno` had + * when the reading failed, otherwise (negative) the value + * of an error identifier provided by this library + */ + int connector_name_error; + + + /** + * The type of the connector that is associated with the CRTC + */ + int connector_type; + + /** + * Zero on success, positive it holds the value `errno` had + * when the reading failed, otherwise (negative) the value + * of an error identifier provided by this library + */ + int connector_type_error; + + + /** + * The gamma characteristics of the monitor as reported + * in its Extended Display Information Data. The value + * holds the value for the red channel. If you do not have + * and more accurate measurement of the gamma for the + * monitor this could be used to give a rought gamma + * correction; simply divide the value with 2.2 and use + * the result for the red channel in the gamma correction. + */ + float gamma_red; + + /** + * The gamma characteristics of the monitor as reported + * in its Extended Display Information Data. The value + * holds the value for the green channel. If you do not have + * and more accurate measurement of the gamma for the + * monitor this could be used to give a rought gamma + * correction; simply divide the value with 2.2 and use + * the result for the green channel in the gamma correction. + */ + float gamma_green; + + /** + * The gamma characteristics of the monitor as reported + * in its Extended Display Information Data. The value + * holds the value for the blue channel. If you do not have + * and more accurate measurement of the gamma for the + * monitor this could be used to give a rought gamma + * correction; simply divide the value with 2.2 and use + * the result for the blue channel in the gamma correction. + */ + float gamma_blue; + + /** + * Zero on success, positive it holds the value `errno` had + * when the reading failed, otherwise (negative) the value + * of an error identifier provided by this library + */ + int gamma_error; + +} libgamma_crtc_information_t; + + + +/** + * Gamma ramp structure for 16-bit gamma ramps + */ +typedef struct libgamma_gamma_ramps +{ + /** + * The size of `red` + */ + size_t red_size; + + /** + * The size of `green` + */ + size_t green_size; + + /** + * The size of `blue` + */ + size_t blue_size; + + /** + * The gamma ramp for the red channel + */ + uint16_t* red; + + /** + * The gamma ramp for the green channel + */ + uint16_t* green; + + /** + * The gamma ramp for the blue channel + */ + uint16_t* blue; + +} libgamma_gamma_ramps_t; + + +/** + * Gamma ramp structure for 32-bit gamma ramps + */ +typedef struct libgamma_gamma_ramps32 +{ + /** + * The size of `red` + */ + size_t red_size; + + /** + * The size of `green` + */ + size_t green_size; + + /** + * The size of `blue` + */ + size_t blue_size; + + /** + * The gamma ramp for the red channel + */ + uint32_t* red; + + /** + * The gamma ramp for the green channel + */ + uint32_t* green; + + /** + * The gamma ramp for the blue channel + */ + uint32_t* blue; + +} libgamma_gamma_ramps32_t; + + +/** + * Gamma ramp structure for 64-bit gamma ramps + */ +typedef struct libgamma_gamma_ramps64 +{ + /** + * The size of `red` + */ + size_t red_size; + + /** + * The size of `green` + */ + size_t green_size; + + /** + * The size of `blue` + */ + size_t blue_size; + + /** + * The gamma ramp for the red channel + */ + uint64_t* red; + + /** + * The gamma ramp for the green channel + */ + uint64_t* green; + + /** + * The gamma ramp for the blue channel + */ + uint64_t* blue; + +} libgamma_gamma_ramps64_t; + + +#endif + diff --git a/src/libgamma.h b/src/libgamma.h new file mode 100644 index 0000000..d6b727c --- /dev/null +++ b/src/libgamma.h @@ -0,0 +1,28 @@ +/** + * 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_H +#define LIBGAMMA_H + + +#include "libgamma-method.h" +#include "libgamma-facade.h" +#include "libgamma-error.h" + + +#endif + |