diff options
Diffstat (limited to 'src/gamma-x-randr.c')
| -rw-r--r-- | src/gamma-x-randr.c | 916 |
1 files changed, 0 insertions, 916 deletions
diff --git a/src/gamma-x-randr.c b/src/gamma-x-randr.c deleted file mode 100644 index 9870f6b..0000000 --- a/src/gamma-x-randr.c +++ /dev/null @@ -1,916 +0,0 @@ -/** - * 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 HAVE_LIBGAMMA_METHOD_X_RANDR -# error Compiling gamma-x-randr.c without HAVE_LIBGAMMA_METHOD_X_RANDR -#endif - -#include "gamma-x-randr.h" - -#include "libgamma-error.h" -#include "edid.h" - -#include <stdlib.h> -#include <errno.h> -#include <string.h> -#include <stdint.h> -#ifdef DEBUG -# include <stdio.h> -#endif - -#include <xcb/xcb.h> -#include <xcb/randr.h> - - -/** - * The major version of RandR the library expects. - */ -#define RANDR_VERSION_MAJOR 1 - -/** - * The minor version of RandR the library expects. - */ -#define RANDR_VERSION_MINOR 3 - - - -/** - * Data structure for partition data. - */ -typedef struct libgamma_x_randr_partition_data -{ - /** - * Mapping from CRTC indices to CRTC identifiers. - */ - xcb_randr_crtc_t* crtcs; - - /** - * Mapping from output indices to output identifiers. - */ - xcb_randr_output_t* outputs; - - /** - * The number of outputs available. - */ - size_t outputs_count; - - /** - * Mapping from CRTC indices to output indices. - * CRTC's without an output (should be impossible) - * have the value `SIZE_MAX` which is impossible - * for an existing mapping. - */ - size_t* crtc_to_output; - - /** - * Screen configuration timestamp. - */ - xcb_timestamp_t config_timestamp; - -} libgamma_x_randr_partition_data_t; - - - -/** - * Translate an xcb error into a libgamma error. - * - * @param error_code The xcb error. - * @param default_error The libgamma error to use if the xcb error is not recognised. - * @return The libgamma error. - */ -static int translate_error_(int error_code, int default_error) -{ - switch (error_code) - { - case XCB_CONN_ERROR: return errno = ECONNABORTED, LIBGAMMA_ERRNO_SET; - case XCB_CONN_CLOSED_EXT_NOTSUPPORTED: return errno = ENOPROTOOPT, LIBGAMMA_ERRNO_SET; - case XCB_CONN_CLOSED_MEM_INSUFFICIENT: return errno = ENOMEM, LIBGAMMA_ERRNO_SET; - case XCB_CONN_CLOSED_REQ_LEN_EXCEED: return errno = EMSGSIZE, LIBGAMMA_ERRNO_SET; - case XCB_CONN_CLOSED_PARSE_ERR: return LIBGAMMA_NO_SUCH_SITE; - case XCB_CONN_CLOSED_INVALID_SCREEN: return LIBGAMMA_NO_SUCH_PARTITION; - case XCB_CONN_CLOSED_FDPASSING_FAILED: return errno = EIO, LIBGAMMA_ERRNO_SET; - default: - return default_error; - } -} - - -/** - * Translate an xcb error into a libgamma error. - * - * @param error_code The xcb error. - * @param default_error The libgamma error to use if the xcb error is not recognised. - * @param return_errno Whether an `errno` value may be returned. - * @return The libgamma error. - */ -static int translate_error(int error_code, int default_error, int return_errno) -{ - int r = translate_error_(error_code, default_error); - return return_errno ? (r > 0 ? errno : r) : r; -} - - -/** - * 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) -{ - char* display = getenv("DISPLAY"); - this->crtc_information = LIBGAMMA_CRTC_INFO_EDID - | LIBGAMMA_CRTC_INFO_WIDTH_MM - | LIBGAMMA_CRTC_INFO_HEIGHT_MM - | LIBGAMMA_CRTC_INFO_WIDTH_MM_EDID - | LIBGAMMA_CRTC_INFO_HEIGHT_MM_EDID - | LIBGAMMA_CRTC_INFO_GAMMA_SIZE - | LIBGAMMA_CRTC_INFO_GAMMA_DEPTH - | LIBGAMMA_CRTC_INFO_SUBPIXEL_ORDER - | LIBGAMMA_CRTC_INFO_CONNECTOR_NAME - | LIBGAMMA_CRTC_INFO_CONNECTOR_TYPE - | LIBGAMMA_CRTC_INFO_GAMMA; - this->default_site_known = (display && *display) ? 1 : 0; - this->multiple_sites = 1; - this->multiple_partitions = 1; - this->multiple_crtcs = 1; - this->partitions_are_graphics_cards = 0; - this->site_restore = 0; - this->partition_restore = 0; - this->crtc_restore = 0; - this->identical_gamma_sizes = 1; - this->fixed_gamma_size = 0; - this->fixed_gamma_depth = 1; - this->real = 1; - this->fake = 0; -} - - -# pragma GCC diagnostic push -# pragma GCC diagnostic ignored "-Waggregate-return" - - -/** - * 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) -{ - xcb_generic_error_t* error = NULL; - xcb_connection_t* restrict connection; - xcb_randr_query_version_cookie_t cookie; - xcb_randr_query_version_reply_t* restrict reply; - const xcb_setup_t* restrict setup; - xcb_screen_iterator_t iter; - - this->data = connection = xcb_connect(site, NULL); - if (connection == NULL) - return LIBGAMMA_NO_SUCH_SITE; - - cookie = xcb_randr_query_version(connection, RANDR_VERSION_MAJOR, RANDR_VERSION_MINOR); - reply = xcb_randr_query_version_reply(connection, cookie, &error); - - if ((error != NULL) || (reply == NULL)) - { - free(reply); - xcb_disconnect(connection); - if (error != NULL) - return translate_error(error->error_code, LIBGAMMA_PROTOCOL_VERSION_QUERY_FAILED, 0); - return LIBGAMMA_PROTOCOL_VERSION_QUERY_FAILED; - } - - if ((reply->major_version != RANDR_VERSION_MAJOR) || - (reply->minor_version < RANDR_VERSION_MINOR)) - { -#ifdef DEBUG - fprintf(stderr, "libgamma: RandR protocol version: %u.%u", reply->major_version, reply->minor_version); -#endif - free(reply); - xcb_disconnect(connection); - return LIBGAMMA_PROTOCOL_VERSION_NOT_SUPPORTED; - } - - free(reply); - - if ((setup = xcb_get_setup(connection)) == NULL) - { - xcb_disconnect(connection); - return LIBGAMMA_LIST_PARTITIONS_FAILED; - } - iter = xcb_setup_roots_iterator(setup); - this->partitions_available = (size_t)(iter.rem); - - return iter.rem < 0 ? LIBGAMMA_NEGATIVE_PARTITION_COUNT : 0; -} - - -/** - * 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) -{ - xcb_disconnect((xcb_connection_t*)(this->data)); -} - - -/** - * 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) -{ - (void) this; - return errno = ENOTSUP, LIBGAMMA_ERRNO_SET; -} - - -/** - * Duplicate a memory area. - * - * @param ptr The memory aree. - * @param bytes The size, in bytes, of the memory area. - * @return A duplication of the memory, `NULL` if zero-length or on error. - */ -static inline void* memdup(void* restrict ptr, size_t bytes) -{ - char* restrict rc; - if (bytes == 0) - return NULL; - if ((rc = malloc(bytes)) == NULL) - return NULL; - memcpy(rc, ptr, bytes); - return rc; -} - - -/** - * 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) -{ - int fail_rc = LIBGAMMA_ERRNO_SET; - xcb_connection_t* restrict connection = site->data; - const xcb_setup_t* restrict setup = xcb_get_setup(connection); - xcb_screen_t* restrict screen = NULL; - xcb_generic_error_t* error = NULL; - xcb_screen_iterator_t iter; - xcb_randr_get_screen_resources_current_cookie_t cookie; - xcb_randr_get_screen_resources_current_reply_t* restrict reply; - xcb_randr_crtc_t* restrict crtcs; - xcb_randr_output_t* restrict outputs; - libgamma_x_randr_partition_data_t* restrict data; - size_t i; - - if (setup == NULL) - return LIBGAMMA_LIST_PARTITIONS_FAILED; - - for (i = 0; iter.rem > 0; i++, xcb_screen_next(&iter)) - if (i == partition) - { - screen = iter.data; - break; - } - if (iter.rem == 0) - return LIBGAMMA_NO_SUCH_PARTITION; - - if (screen == NULL) - return LIBGAMMA_NULL_PARTITION; - - cookie = xcb_randr_get_screen_resources_current(connection, screen->root); - reply = xcb_randr_get_screen_resources_current_reply(connection, cookie, &error); - if (error != NULL) - return translate_error(error->error_code, LIBGAMMA_LIST_CRTCS_FAILED, 0); - - this->crtcs_available = reply->num_crtcs; - crtcs = xcb_randr_get_screen_resources_current_crtcs(reply); - outputs = xcb_randr_get_screen_resources_current_outputs(reply); - if ((crtcs == NULL) || (outputs == NULL)) - { - free(reply); - return LIBGAMMA_REPLY_VALUE_EXTRACTION_FAILED; - } - - /* We use `calloc` because we want `data`'s pointers to be `NULL` if not allocated at `fail`. */ - data = calloc(1, sizeof(libgamma_x_randr_partition_data_t)); - if (data == NULL) - goto fail; - - /* Copy the CRTC:s, just so we do not have to keep the reply in memory. */ - data->crtcs = memdup(crtcs, (size_t)(reply->num_crtcs) * sizeof(xcb_randr_crtc_t)); - if ((data->crtcs == NULL) && (reply->num_crtcs > 0)) - goto fail; - - /* Copy the outputs as well. */ - data->outputs = memdup(outputs, (size_t)(reply->num_outputs) * sizeof(xcb_randr_output_t)); - if ((data->outputs == NULL) && (reply->num_outputs > 0)) - goto fail; - - data->outputs_count = (size_t)(reply->num_outputs); - - data->crtc_to_output = malloc((size_t)(reply->num_crtcs) * sizeof(size_t)); - if (data->crtc_to_output == NULL) - goto fail; - for (i = 0; i < (size_t)(reply->num_crtcs); i++) - data->crtc_to_output[i] = SIZE_MAX; - for (i = 0; i < (size_t)(reply->num_outputs); i++) - { - xcb_randr_get_output_info_cookie_t out_cookie; - xcb_randr_get_output_info_reply_t* out_reply; - uint16_t j; - - out_cookie = xcb_randr_get_output_info(connection, outputs[i], reply->config_timestamp); - out_reply = xcb_randr_get_output_info_reply(connection, out_cookie, &error); - if (error != NULL) - { - fail_rc = translate_error(error->error_code, LIBGAMMA_OUTPUT_INFORMATION_QUERY_FAILED, 0); - goto fail; - } - - for (j = 0; j < reply->num_crtcs; j++) - if (crtcs[j] == out_reply->crtc) - { - data->crtc_to_output[j] = i; - break; - } - - free(out_reply); - } - - data->config_timestamp = reply->config_timestamp; - this->data = data; - free(reply); - return 0; - - fail: - if (data != NULL) - { - free(data->crtcs); - free(data->outputs); - free(data->crtc_to_output); - free(data); - } - free(reply); - return fail_rc; -} - - -/** - * 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) -{ - libgamma_x_randr_partition_data_t* restrict data = this->data; - free(data->crtcs); - free(data->outputs); - free(data->crtc_to_output); - free(data); -} - - -/** - * 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) -{ - (void) this; - return errno = ENOTSUP, LIBGAMMA_ERRNO_SET; -} - - - -/** - * 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) -{ - libgamma_x_randr_partition_data_t* restrict screen_data = partition->data; - xcb_randr_crtc_t* restrict crtc_ids = screen_data->crtcs; - if (crtc >= partition->crtcs_available) - return LIBGAMMA_NO_SUCH_CRTC; - this->data = crtc_ids + crtc; - return 0; -} - - -/** - * 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) -{ - (void) 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_x_randr_crtc_restore(libgamma_crtc_state_t* restrict this) -{ - (void) this; - return errno = ENOTSUP, LIBGAMMA_ERRNO_SET; -} - - - -/** - * Get the gamma ramp size of 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. - * @return Non-zero on error. - */ -static int get_gamma_ramp_size(libgamma_crtc_information_t* restrict out, libgamma_crtc_state_t* restrict crtc) -{ - xcb_connection_t* restrict connection = crtc->partition->site->data; - xcb_randr_crtc_t* restrict crtc_id = crtc->data; - xcb_randr_get_crtc_gamma_size_cookie_t cookie; - xcb_randr_get_crtc_gamma_size_reply_t* restrict reply; - xcb_generic_error_t* error; - - out->gamma_size_error = 0; - cookie = xcb_randr_get_crtc_gamma_size(connection, *crtc_id); - reply = xcb_randr_get_crtc_gamma_size_reply(connection, cookie, &error); - if (error != NULL) - return out->gamma_size_error = translate_error(error->error_code, LIBGAMMA_GAMMA_RAMPS_SIZE_QUERY_FAILED, 1); - if (reply->size < 2) - out->gamma_size_error = LIBGAMMA_SINGLETON_GAMMA_RAMP; - out->red_gamma_size = out->green_gamma_size = out->blue_gamma_size = reply->size; - free(reply); - return out->gamma_size_error; -} - - -/** - * Read information from the CRTC's output. - * - * @param out Instance of a data structure to fill with the information about the CRTC. - * @param output The CRTC's output information. - * @return Non-zero if at least on error occured. - */ -static int read_output_data(libgamma_crtc_information_t* restrict out, xcb_randr_get_output_info_reply_t* restrict output) -{ - switch (output->connection) - { - case XCB_RANDR_CONNECTION_CONNECTED: - out->active = 1; - out->width_mm = output->mm_width; - out->height_mm = output->mm_height; -#define __select(value) \ - case XCB_RENDER_SUB_PIXEL_##value: out->subpixel_order = LIBGAMMA_SUBPIXEL_ORDER_##value; break - switch (output->subpixel_order) - { - __select (UNKNOWN); - __select (HORIZONTAL_RGB); - __select (HORIZONTAL_BGR); - __select (VERTICAL_RGB); - __select (VERTICAL_BGR); - __select (NONE); - default: - out->subpixel_order_error = LIBGAMMA_SUBPIXEL_ORDER_NOT_RECOGNISED; - break; - } -#undef __select - return 0; - - case XCB_RANDR_CONNECTION_DISCONNECTED: - out->active = 0; - out->width_mm_error = LIBGAMMA_NOT_CONNECTED; - out->height_mm_error = LIBGAMMA_NOT_CONNECTED; - out->subpixel_order_error = LIBGAMMA_NOT_CONNECTED; - return 0; - - default: - out->active = 0; - out->active_error = LIBGAMMA_STATE_UNKNOWN; - out->width_mm_error = LIBGAMMA_NOT_CONNECTED; - out->height_mm_error = LIBGAMMA_NOT_CONNECTED; - out->subpixel_order_error = LIBGAMMA_NOT_CONNECTED; - return -1; - } -} - - -/** - * Determine the connector type from the connector name. - * - * @param this The CRTC information to use and extend. - * @param Non-zero on error. - */ -static int get_connector_type(libgamma_crtc_information_t* restrict this) -{ - if ((this->connector_type_error = this->connector_name_error)) - return -1; - -#define __select(name, type) \ - if (strstr(this->connector_name, name "-") == this->connector_name) \ - return this->connector_type = LIBGAMMA_CONNECTOR_TYPE_##type, 0 - - __select ("None", Unknown); - __select ("VGA", VGA); - __select ("DVI-I", DVII); - __select ("DVI-D", DVID); - __select ("DVI-A", DVIA); - __select ("Composite", Composite); - __select ("S-Video", SVIDEO); - __select ("Component", Component); - __select ("LFP", LFP); - __select ("Proprietary", Unknown); - __select ("HDMI", HDMI); - __select ("DisplayPort", DisplayPort); - -#undef __select - - this->connector_name_error = LIBGAMMA_CONNECTOR_TYPE_NOT_RECOGNISED; - return -1; -} - - -/** - * Get the output name of a CRTC. - * - * @param this Instance of a data structure to fill with the information about the CRTC. - * @param output The CRTC's output's information. - * @return Non-zero on error. - */ -static int get_output_name(libgamma_crtc_information_t* restrict out, xcb_randr_get_output_info_reply_t* restrict output) -{ - char* restrict store; - uint8_t* restrict name; - uint16_t length; - size_t i; - - name = xcb_randr_get_output_info_name(output); - length = output->name_len; /* There is no NUL-termination. */ - if (name == NULL) - { - out->connector_name_error = LIBGAMMA_REPLY_VALUE_EXTRACTION_FAILED; - return -1; - } - - store = malloc(((size_t)length + 1) * sizeof(char)); - if (store == NULL) - { - out->connector_name_error = errno; - return -1; - } - - /* char is guaranteed to be (u)int_least8_t, but it is only guaranteed to be (u)int8_t - * on POSIX, so to be truly portable we will not assume that char is (u)int8_t. */ - for (i = 0; i < (size_t)length; i++) - store[i] = (char)(name[i]); - store[length] = '\0'; - - return 0; -} - - -/** - * Get the Extended Display Information Data of the monitor connected to the connector of a CRTC. - * - * @param out 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 output The CRTC's output. - * @return Non-zero on error. - */ -static int get_edid(libgamma_crtc_information_t* restrict out, - libgamma_crtc_state_t* restrict crtc, xcb_randr_output_t output) -{ - xcb_connection_t* restrict connection = crtc->partition->site->data; - xcb_randr_list_output_properties_cookie_t prop_cookie; - xcb_randr_list_output_properties_reply_t* restrict prop_reply; - xcb_atom_t* atoms; - xcb_atom_t* atoms_end; - xcb_generic_error_t* error; - - /* Acquire a list of all properties of the output. */ - prop_cookie = xcb_randr_list_output_properties(connection, output); - prop_reply = xcb_randr_list_output_properties_reply(connection, prop_cookie, &error); - - if (error != NULL) - return out->edid_error = translate_error(error->error_code, LIBGAMMA_LIST_PROPERTIES_FAILED, 1); - - /* Extract the properties form the data structure that holds them, */ - atoms = xcb_randr_list_output_properties_atoms(prop_reply); - /* and get the last one so that we can iterate over them nicely. */ - atoms_end = atoms + xcb_randr_list_output_properties_atoms_length(prop_reply); - - if (atoms == NULL) - { - free(prop_reply); - return out->edid_error = LIBGAMMA_REPLY_VALUE_EXTRACTION_FAILED;; - } - - /* For each property */ - for (; atoms != atoms_end; atoms++) - { - xcb_get_atom_name_cookie_t atom_name_cookie; - xcb_get_atom_name_reply_t* restrict atom_name_reply; - char* restrict atom_name; - int atom_name_len; - xcb_randr_get_output_property_cookie_t atom_cookie; - xcb_randr_get_output_property_reply_t* restrict atom_reply; - unsigned char* restrict atom_data; - int length; - - /* Acquire the atom name. */ - atom_name_cookie = xcb_get_atom_name(connection, *atoms); - atom_name_reply = xcb_get_atom_name_reply(connection, atom_name_cookie, &error); - if (error) - continue; - - /* Extract the atom name from the data structure that holds it. */ - atom_name = xcb_get_atom_name_name(atom_name_reply); - /* As well as the length of the name; it is not NUL-termianted.*/ - atom_name_len = xcb_get_atom_name_name_length(atom_name_reply); - - if (/* Check for errors. */ - (atom_name == NULL) || /* (atom_name_len < 1) || */ - /* Check that the length is the expected length for the EDID property. */ - (atom_name_len != 4) || - /* Check that the property is the EDID property. */ - (atom_name[0] != 'E') || (atom_name[1] != 'D') || (atom_name[2] != 'I') || (atom_name[3] != 'D')) - { - free(atom_name_reply); - continue; - } - - /* Acquire the property's value, we know that it is either 128 or 256 byte long. */ - atom_cookie = xcb_randr_get_output_property(connection, output, *atoms, - XCB_GET_PROPERTY_TYPE_ANY, 0, 256, 0, 0); - atom_reply = xcb_randr_get_output_property_reply(connection, atom_cookie, &error); - /* (*) EDID version 1.0 through 1.4 define it as 128 bytes long, - * but version 2.0 define it as 256 bytes long. However, - * version 2.0 is rare(?) and has been deprecated and replaced - * by version 1.3 (I guess that is with a new version epoch, - * but I do not know.) */ - if (error) - { - free(atom_name_reply); - free(prop_reply); - return out->edid_error = LIBGAMMA_PROPERTY_VALUE_QUERY_FAILED; - } - - /* Extract the property's value, */ - atom_data = xcb_randr_get_output_property_data(atom_reply); - /* and its actual length. */ - length = xcb_randr_get_output_property_data_length(atom_reply); - if ((atom_data == NULL) || (length < 1)) - { - free(atom_reply); - free(atom_name_reply); - free(prop_reply); - return out->edid_error = LIBGAMMA_REPLY_VALUE_EXTRACTION_FAILED; - } - - /* Store the EDID. */ - out->edid = malloc((size_t)length * sizeof(unsigned char)); - if (out->edid == NULL) - out->edid_error = errno; - else - memcpy(out->edid, atom_data, (size_t)length * sizeof(unsigned char)); - - free(atom_reply); - free(atom_name_reply); - free(prop_reply); - - return out->edid_error; - } - - return out->edid_error = LIBGAMMA_EDID_NOT_FOUND; -} - - -/** - * 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) -{ -#define _E(FIELD) ((fields & FIELD) ? LIBGAMMA_CRTC_INFO_NOT_SUPPORTED : 0) - int e = 0; - xcb_randr_get_output_info_reply_t* restrict output_info = NULL; - xcb_randr_output_t output; - int free_edid; - - /* Wipe all error indicators. */ - memset(this, 0, sizeof(libgamma_crtc_information_t)); - - /* We need to free the EDID after us if it is not explicitly requested. */ - free_edid = (fields & LIBGAMMA_CRTC_INFO_EDID) == 0; - - /* Figure out what fields we need to get the data for to get the data for other fields. */ - if ((fields & (LIBGAMMA_CRTC_INFO_WIDTH_MM_EDID | LIBGAMMA_CRTC_INFO_HEIGHT_MM_EDID | LIBGAMMA_CRTC_INFO_GAMMA))) - fields |= LIBGAMMA_CRTC_INFO_EDID; - if ((fields & LIBGAMMA_CRTC_INFO_CONNECTOR_TYPE)) - fields |= LIBGAMMA_CRTC_INFO_CONNECTOR_NAME; - if ((fields & (LIBGAMMA_CRTC_INFO_WIDTH_MM | LIBGAMMA_CRTC_INFO_HEIGHT_MM | LIBGAMMA_CRTC_INFO_SUBPIXEL_ORDER))) - fields |= LIBGAMMA_CRTC_INFO_ACTIVE; - - /* Jump if the output information is not required. */ - if ((fields & (LIBGAMMA_CRTC_INFO_ACTIVE | LIBGAMMA_CRTC_INFO_CONNECTOR_NAME)) == 0) - goto cont; - - /* Get connector and connector information. */ - { - xcb_connection_t* restrict connection = crtc->partition->site->data; - libgamma_x_randr_partition_data_t* restrict screen_data = crtc->partition->data; - size_t output_index = screen_data->crtc_to_output[crtc->crtc]; - xcb_randr_get_output_info_cookie_t cookie; - xcb_generic_error_t* error; - if (output_index == SIZE_MAX) - { - e |= this->edid_error = this->gamma_error = this->width_mm_edid_error - = this->height_mm_edid_error = this->connector_type_error - = this->connector_name_error = this->subpixel_order_error - = this->width_mm_error = this->height_mm_error - = this->active_error = LIBGAMMA_CONNECTOR_UNKNOWN; - goto cont; - } - output = screen_data->outputs[output_index]; - cookie = xcb_randr_get_output_info(connection, output, screen_data->config_timestamp); - output_info = xcb_randr_get_output_info_reply(connection, cookie, &error); - if (error != NULL) - { - e |= this->edid_error = this->gamma_error = this->width_mm_edid_error - = this->height_mm_edid_error = this->connector_type_error - = this->connector_name_error = this->subpixel_order_error - = this->width_mm_error = this->height_mm_error - = this->active_error = LIBGAMMA_OUTPUT_INFORMATION_QUERY_FAILED; - goto cont; - } - } - - e |= get_output_name(this, output_info); - if ((fields & LIBGAMMA_CRTC_INFO_CONNECTOR_TYPE)) - e |= get_connector_type(this); - e |= read_output_data(this, output_info); - if ((fields & (LIBGAMMA_CRTC_INFO_WIDTH_MM | LIBGAMMA_CRTC_INFO_HEIGHT_MM))) - e |= this->width_mm_error | this->height_mm_error; - e |= (fields & LIBGAMMA_CRTC_INFO_SUBPIXEL_ORDER) ? this->subpixel_order_error : 0; - - if ((fields & LIBGAMMA_CRTC_INFO_EDID) == 0) - goto cont; - if (this->active == 0) - { - e |= this->edid_error = this->gamma_error = this->width_mm_edid_error - = this->height_mm_edid_error = LIBGAMMA_NOT_CONNECTED; - goto cont; - } - e |= get_edid(this, crtc, output); - if (this->edid == NULL) - { - this->gamma_error = this->width_mm_edid_error = this->height_mm_edid_error = this->edid_error; - goto cont; - } - if ((fields & (LIBGAMMA_CRTC_INFO_WIDTH_MM_EDID | LIBGAMMA_CRTC_INFO_HEIGHT_MM_EDID | LIBGAMMA_CRTC_INFO_GAMMA))) - e |= libgamma_parse_edid(this, fields); - - cont: - e |= (fields & LIBGAMMA_CRTC_INFO_GAMMA_SIZE) ? get_gamma_ramp_size(this, crtc) : 0; - this->gamma_depth = 16; - e |= this->gamma_support_error = _E(LIBGAMMA_CRTC_INFO_GAMMA_SUPPORT); - - /* Free the EDID after us. */ - if (free_edid) - { - free(this->edid); - this->edid = NULL; - } - - free(output_info); - return e ? -1 : 0; -#undef _E -} - - -/** - * 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) -{ - xcb_connection_t* restrict connection = this->partition->site->data; - xcb_randr_get_crtc_gamma_cookie_t cookie; - xcb_randr_get_crtc_gamma_reply_t* restrict reply; - xcb_generic_error_t* error; - uint16_t* restrict red; - uint16_t* restrict green; - uint16_t* restrict blue; - -#ifdef DEBUG - if ((ramps->red_size != ramps->green_size) || - (ramps->red_size != ramps->blue_size)) - return LIBGAMMA_MIXED_GAMMA_RAMP_SIZE; -#endif - - cookie = xcb_randr_get_crtc_gamma(connection, *(xcb_randr_crtc_t*)(this->data)); - reply = xcb_randr_get_crtc_gamma_reply(connection, cookie, &error); - - if (error != NULL) - return translate_error(error->error_code, LIBGAMMA_GAMMA_RAMP_READ_FAILED, 0); - - red = xcb_randr_get_crtc_gamma_red(reply); - green = xcb_randr_get_crtc_gamma_green(reply); - blue = xcb_randr_get_crtc_gamma_blue(reply); - memcpy(ramps->red, red, ramps->red_size * sizeof(uint16_t)); - memcpy(ramps->green, green, ramps->green_size * sizeof(uint16_t)); - memcpy(ramps->blue, blue, ramps->blue_size * sizeof(uint16_t)); - - free(reply); - return 0; -} - - -/** - * 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) -{ - xcb_connection_t* restrict connection = this->partition->site->data; - xcb_void_cookie_t cookie; - xcb_generic_error_t* restrict error; -#ifdef DEBUG - if ((ramps.red_size != ramps.green_size) || - (ramps.red_size != ramps.blue_size)) - return LIBGAMMA_MIXED_GAMMA_RAMP_SIZE; -#endif - cookie = xcb_randr_set_crtc_gamma_checked(connection, *(xcb_randr_crtc_t*)(this->data), - (uint16_t)(ramps.red_size), ramps.red, ramps.green, ramps.blue); - if ((error = xcb_request_check(connection, cookie)) != NULL) - return translate_error(error->error_code, LIBGAMMA_GAMMA_RAMP_WRITE_FAILED, 0); - return 0; -} - - -# pragma GCC diagnostic pop - |