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Diffstat (limited to 'src/blueshift_idcrtc.c')
| -rw-r--r-- | src/blueshift_idcrtc.c | 406 |
1 files changed, 0 insertions, 406 deletions
diff --git a/src/blueshift_idcrtc.c b/src/blueshift_idcrtc.c deleted file mode 100644 index 8e41c11..0000000 --- a/src/blueshift_idcrtc.c +++ /dev/null @@ -1,406 +0,0 @@ -/** - * Copyright © 2014 Mattias Andrée (maandree@member.fsf.org) - * - * This program 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 program 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 program. If not, see <http://www.gnu.org/licenses/>. - */ -#include <stdlib.h> -#include <stdio.h> -#include <string.h> -#include <inttypes.h> -#include <alloca.h> - -#include <xcb/xcb.h> -#include <xcb/randr.h> - - - -/** - * The major version of RANDR the program expects - */ -#define RANDR_VERSION_MAJOR 1 - -/** - * The minor version of RANDR the program expects - */ -#define RANDR_VERSION_MINOR 3 - - - -/** - * Connection to the X server - */ -static xcb_connection_t* connection; - -/** - * Used to store errors in - */ -static xcb_generic_error_t* error; - - - -/** - * Main entry point of the program - * - * @param argc Length of `argv` - * @param argv Command line arguments - * @return Zero on success - */ - #pragma GCC diagnostic push - #pragma GCC diagnostic ignored "-Wstack-protector" -int main(int argc, char** argv) -{ - #pragma GCC diagnostic pop - char* display = NULL; - xcb_randr_query_version_cookie_t version_cookie; - xcb_randr_query_version_reply_t* randr_version; - xcb_screen_iterator_t iter; - int screen_count; - int screen_i; - int i; - - - /* Get X connection */ - - /* This acquires a connection to the - X display indicated by the DISPLAY - environ variable, or as indicated - by the first command line argument - if existent. */ - if (argc > 1) - display = *(argv + 1); - connection = xcb_connect(display, NULL); - - - /* Check RandR protocol version */ - - /* Check that the version of RandR is supported. */ - version_cookie = xcb_randr_query_version(connection, RANDR_VERSION_MAJOR, RANDR_VERSION_MINOR); - randr_version = xcb_randr_query_version_reply(connection, version_cookie, &error); - - if (error || (randr_version == NULL)) - { - /* If not possible, print an error message and - close the connection to the display. */ - fprintf(stderr, "RandR version query returned %i\n", error ? error->error_code : -1); - xcb_disconnect(connection); - return 1; - } - - if (randr_version->major_version != RANDR_VERSION_MAJOR || randr_version->minor_version < RANDR_VERSION_MINOR) - { - /* If the version did not match, print a warning, */ - fprintf(stderr, "Unsupported RandR version, got %u.%u, expected %u.%u\n", - randr_version->major_version, randr_version->minor_version, - RANDR_VERSION_MAJOR, RANDR_VERSION_MINOR); - /* free the version information resources, */ - free(randr_version); - /* and close the connection to the display. */ - xcb_disconnect(connection); - return 1; - } - - /* Free the version information resources. */ - free(randr_version); - - - /* Get screen information */ - - /* Acquire a list of all screens in the display, */ - iter = xcb_setup_roots_iterator(xcb_get_setup(connection)); - /* count the list. */ - screen_count = iter.rem; - - /* Print the number available screens. */ - printf("Screen count: %i\n", screen_count); - for (screen_i = 0; screen_i < screen_count; screen_i++) - { - /* For each screen */ - xcb_screen_t* screen = iter.data; - xcb_randr_get_screen_resources_current_cookie_t res_cookie; - xcb_randr_get_screen_resources_current_reply_t* res_reply; - xcb_randr_output_t* outputs; - xcb_randr_crtc_t* crtcs; - int output_i; - - /* We have acquired the screen, go to next in preperation for next iteration. */ - xcb_screen_next(&iter); - - /* Print the screen index. */ - printf("Screen: %i\n", screen_i); - - /* Acquire information about the screen. */ - res_cookie = xcb_randr_get_screen_resources_current(connection, screen->root); - res_reply = xcb_randr_get_screen_resources_current_reply(connection, res_cookie, &error); - - if (error) - { - /* On error print an error message and close the connection to the display. */ - fprintf(stderr, "RandR screen resource query returned %i\n", error->error_code); - xcb_disconnect(connection); - return 1; - } - - /* Print the CRTC count, */ - printf(" CRTC count: %i\n", res_reply->num_crtcs); - /* and the output count. */ - printf(" Output count: %i\n", res_reply->num_outputs); - /* There are as many outputs as there are - connectors, that is, the number of - monitors that you could potentially - plugg into the graphics cards that - are associated with the screen, even - if that many are not supported. But - there are only as many CRTC:s as - there are monitors actually plugged - in and supported. */ - - - /* Get output information */ - - /* Extract output list. */ - outputs = xcb_randr_get_screen_resources_current_outputs(res_reply); - /* Extract CRTC list. */ - crtcs = xcb_randr_get_screen_resources_current_crtcs(res_reply); - /* For each output */ - for (output_i = 0; output_i < res_reply->num_outputs; output_i++) - { - xcb_randr_get_output_info_cookie_t out_cookie; - xcb_randr_get_output_info_reply_t* out_reply; - uint8_t* name; - int name_len; - - /* Acquire information about the output. */ - out_cookie = xcb_randr_get_output_info(connection, outputs[output_i], res_reply->config_timestamp); - out_reply = xcb_randr_get_output_info_reply(connection, out_cookie, &error); - - if (error) - { - /* On error print an error message, release the screen resources, - and close the connection to the display. */ - fprintf(stderr, "RandR output query returned %i\n", error->error_code); - free(res_reply); - xcb_disconnect(connection); - return 1; - } - - /* Print the index, in the scope of the screen, of the output. */ - printf(" Output: %i\n", output_i); - - /* We use indention not for computer-readability, but - exclusively for human-readability, especially for - debugging. */ - - /* Extract the output name from the data structure that holds it. */ - name = xcb_randr_get_output_info_name(out_reply); - /* As well as the length of the name; it is not NUL-termianted. */ - name_len = out_reply->name_len; - - /* Print the output name, we specified length, so that - printf does not attempt to read outside the name, - as it is not NUL-terminated. */ - printf(" Name: %.*s\n", name_len, name); - - /* Check connection status */ - switch (out_reply->connection) - { - case XCB_RANDR_CONNECTION_CONNECTED: - /* If connectioned, do stuff! */ - { - xcb_randr_list_output_properties_cookie_t prop_cookie; - xcb_randr_list_output_properties_reply_t* prop_reply; - xcb_atom_t* atoms; - xcb_atom_t* atoms_end; - int crtc_i; - - /* Print that the connector is used. */ - printf(" Connection: connected\n"); - /* And print what dimensions RandR thinks the monitor has, - physically in millimeters, however common that it is - extremely wrong as it does not read it from the extended - display identication data, but tries to calculate it. */ - printf(" Size: %i %i\n", out_reply->mm_width, out_reply->mm_height); - - /* Iterate over all CRTC:s, */ - for (crtc_i = 0; crtc_i < res_reply->num_crtcs; crtc_i++) - /* and look for a CRTC with the same ID, */ - if (crtcs[crtc_i] == out_reply->crtc) - { - /* and print that CRTC:s index. */ - printf(" CRTC: %i\n", crtc_i); - break; - } - - /* Acquire a list of all properties of the output. */ - prop_cookie = xcb_randr_list_output_properties(connection, outputs[output_i]); - prop_reply = xcb_randr_list_output_properties_reply(connection, prop_cookie, &error); - - if (error) - { - /* On error print an error message, */ - fprintf(stderr, "RandR output property query returned %i\n", error->error_code); - /* and free that output and screen information resources, */ - free(out_reply); - free(res_reply); - /* and then close the connection to the display. */ - xcb_disconnect(connection); - return 1; - } - - - /* Get output atoms */ - - /* 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); - - /* For each property */ - for (; atoms != atoms_end; atoms++) - { - xcb_get_atom_name_cookie_t atom_name_cookie; - xcb_get_atom_name_reply_t* atom_name_reply; - char* atom_name; - char* atom_name_; - int atom_name_len; - - /* 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) - { - /* On error print an error message, */ - fprintf(stderr, "RandR atom name query returned %i\n", error->error_code); - /* and release the property list, */ - free(prop_reply); - /* the output information resources */ - free(out_reply); - /* and the screen information resources. */ - free(res_reply); - /* And then close the connection to the display. */ - xcb_disconnect(connection); - return 1; - } - - /* 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); - - /* NUL-terminate the atom name. */ - atom_name = alloca(((size_t)atom_name_len + 1U) * sizeof(char)); - memcpy(atom_name, atom_name_, (size_t)atom_name_len * sizeof(char)); - *(atom_name + atom_name_len) = 0; - /* (It is allocated on the stack, so it should not be free:d.) */ - - - /* Get output identifier */ - - /* Look for the the property named EDID. */ - if (!strcmp(atom_name, "EDID")) - { - xcb_randr_get_output_property_cookie_t atom_cookie; - xcb_randr_get_output_property_reply_t* atom_reply; - int length; - unsigned char* atom_data_; - char* atom_data; - - /* Acquire the property's value, we know that it is either 128 or 256 byte long. */ - atom_cookie = xcb_randr_get_output_property(connection, outputs[output_i], *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) - { - /* On error print an error message, */ - fprintf(stderr, "RandR atom data query returned %i\n", error->error_code); - /* and release the property name, */ - free(atom_name_reply); - /* release the property list, */ - free(prop_reply); - /* the output information resources */ - free(out_reply); - /* and the screen information resources. */ - free(res_reply); - /* And then close the connection to the display. */ - xcb_disconnect(connection); - return 1; - } - - /* 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); - - /* Convert to hexadecimal representation. */ - atom_data = alloca((2U * (size_t)length + 1U) * sizeof(char)); - for (i = 0; i < length; i++) - { - *(atom_data + i * 2 + 0) = "0123456789abcdef"[(*(atom_data_ + i) >> 4) & 15]; - *(atom_data + i * 2 + 1) = "0123456789abcdef"[(*(atom_data_ + i) >> 0) & 15]; - } - /* NUL-terminate. */ - *(atom_data + 2 * length) = 0; - - /* Print the property's name and values. */ - printf(" %s: %s\n", atom_name, atom_data); - - /* Free the proprty value. */ - free(atom_reply); - } - - /* Free the name of the atom. */ - free(atom_name_reply); - } - - /* Free the list of properties. */ - free(prop_reply); - } - break; - - case XCB_RANDR_CONNECTION_DISCONNECTED: - /* If disconnected, print that and continue to next output. */ - printf(" Connection: disconnected\n"); - break; - - case XCB_RANDR_CONNECTION_UNKNOWN: - default: - /* If the connection status is unkown, print that and continue to next output. */ - printf(" Connection: unknown\n"); - break; - } - - /* Free the output information resources. */ - free(out_reply); - } - - /* Free the screen information resources. */ - free(res_reply); - } - - - /* Free resources **/ - - /* Close the connection to the display.*/ - xcb_disconnect(connection); - return 0; -} - |