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-rw-r--r--src/blueshift_crtc_c.c171
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;
+}
+