Implement kms vaapi capture

include/utils.h

@@ -0,0 +1,26 @@
+#ifndef GSR_UTILS_H
+#define GSR_UTILS_H
+
+#include "vec2.h"
+#include <stdbool.h>
+#include <X11/extensions/Xrandr.h>
+
+typedef struct {
+    vec2i pos;
+    vec2i size;
+} gsr_monitor;
+
+typedef struct {
+    const char *name;
+    int name_len;
+    gsr_monitor *monitor;
+    bool found_monitor;
+} get_monitor_by_name_userdata;
+
+double clock_get_monotonic_seconds(void);
+
+typedef void (*active_monitor_callback)(const XRROutputInfo *output_info, const XRRCrtcInfo *crt_info, const XRRModeInfo *mode_info, void *userdata);
+void for_each_active_monitor_output(Display *display, active_monitor_callback callback, void *userdata);
+bool get_monitor_by_name(Display *display, const char *name, gsr_monitor *monitor);
+
+#endif /* GSR_UTILS_H */