diff options
Diffstat (limited to 'src/blueshift_crtc_c.c')
| -rw-r--r-- | src/blueshift_crtc_c.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/src/blueshift_crtc_c.c b/src/blueshift_crtc_c.c new file mode 100644 index 0000000..a874f5e --- /dev/null +++ b/src/blueshift_crtc_c.c @@ -0,0 +1,171 @@ +/** + * 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 Affero 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#include <stdlib.h> +#include <stdio.h> +#include <inttypes.h> + +#include <xcb/xcb.h> +#include <xcb/randr.h> + + + +/** + * The major version of RANDR the program expects + */ +#define RANDR_VERSION_MAJOR 1U + +/** + * The minor version of RANDR the program expects + */ +#define RANDR_VERSION_MINOR 3U + + + +/** + * Connection to the X server + */ +static xcb_connection_t* connection; + +/** + * Used to store errors in + */ +static xcb_generic_error_t* error; + + +int main(int argc __attribute__((unused)), char** argv __attribute__((unused))) +{ + xcb_randr_query_version_cookie_t version_cookie; + xcb_randr_query_version_reply_t* randr_version; + const xcb_setup_t* setup; + xcb_screen_iterator_t iter; + int screen_count; + xcb_screen_t* screens; + int screen_i; + + + /* Get X connection */ + + connection = xcb_connect(NULL, NULL); + + + /* Check RANDR protocol version */ + + 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)) + { + fprintf(stderr, "RANDR version query returned %i", 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) + { + 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(randr_version); + xcb_disconnect(connection); + return 1; + } + + free(randr_version); + + + /* Get screen information */ + + setup = xcb_get_setup(connection); + iter = xcb_setup_roots_iterator(setup); + screen_count = iter.rem; + screens = iter.data; + + printf("Screen count: %i\n", screen_count); + for (screen_i = 0; screen_i < screen_count; screen_i++) + { + xcb_screen_t* screen = screens + screen_i; + 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; + + printf("Screen: %i\n", screen_i); + + 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) + { + fprintf(stderr, "RANDR screen resource query returned %i\n", error->error_code); + xcb_disconnect(connection); + return 1; + } + + printf(" CRTC count: %i\n", res_reply->num_crtcs); + printf(" Output count: %i\n", res_reply->num_outputs); + + outputs = xcb_randr_get_screen_resources_current_outputs(res_reply); + crtcs = xcb_randr_get_screen_resources_current_crtcs(res_reply); + 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; + + 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) + { + fprintf(stderr, "RANDR output query returned %i\n", error->error_code); + xcb_disconnect(connection); + return 1; + } + + printf(" Output: %i\n", output_i); + switch (out_reply->connection) + { + case XCB_RANDR_CONNECTION_CONNECTED: + { + int crtc_i; + printf(" Connection: connected\n"); + printf(" Size: %i %i\n", out_reply->mm_width, out_reply->mm_height); + for (crtc_i = 0; crtc_i < res_reply->num_crtcs; crtc_i++) + if (crtcs[crtc_i] == out_reply->crtc) + printf(" CRTC: %i\n", crtc_i); + } + break; + case XCB_RANDR_CONNECTION_DISCONNECTED: + printf(" Connection: disconnected\n"); + break; + case XCB_RANDR_CONNECTION_UNKNOWN: + default: + printf(" Connection: unknown\n"); + break; + } + } + + free(res_reply); + } + + + /* Free resources **/ + + xcb_disconnect(connection); + return 0; +} + |