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DeeJanuz--frametop/screens/vr.h
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DeeJanuzandClaude Opus 5.5 8f051db083 Send typing to the panel clicked last
An ungrabbed keyboard reached both sides at once: gamescope, which in VR
reads every input device itself (the SteamOS build's InputStealer), typed
into its focused app, and ft-screens typed into the desktop. Space in the
desktop paused Spotify on the dashboard, including every space frame-voice
dictated. And while the SteamVR dashboard was open, the desktop got no
keys at all.

Typing now follows the last click. ft-screens sees clicks on its own
screens; the pointer helper reports the panel under the dot on each mouse
press, so a click on any other panel sends typing to Steam. While typing
goes to the desktop and the screens are showing, ft-screens tells the
relay every second, and the relay grabs pass-through keyboards. A grab
waits until no key is down, and the relay lets go if ft-screens stops
reporting. Controller clicks on other panels aren't visible to overlay
apps, so they don't move typing (noted in the README).

A program that reads every keyboard for a hotkey loses a grabbed one.
Repeating the keys on another input device doesn't work, since gamescope
reads that too, so with SHARE_KEYS=1 the relay sends them to
@frametop_keys as datagrams with the device name. It's off by default:
any local process that binds that name first would get every key typed
into the desktop.

The docs now say gamescope reads keyboards and the headset's buttons
itself; they said SteamVR passed keys on to it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-27 21:52:21 -06:00

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1.8 KiB
C

// The OpenVR side of ft-screens (vr.cpp), called from the wlroots compositor (compositor.c).
#pragma once
#include <stdbool.h>
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
struct ft_dmabuf {
int width, height;
uint32_t format; // DRM_FORMAT_*
uint64_t modifier; // DRM_FORMAT_MOD_*
int n_planes;
uint32_t offset[4], stride[4];
int fd[4];
};
enum ft_event_type { FT_MOTION, FT_BUTTON, FT_SCROLL, FT_LEAVE, FT_QUIT };
struct ft_event {
enum ft_event_type type;
int screen;
double x, y; // FT_MOTION: buffer pixels from the top left
uint32_t button; // FT_BUTTON: linux BTN_*
bool pressed;
double dx, dy; // FT_SCROLL: notches (positive dy: scroll down)
};
bool ft_vr_init(void);
void ft_vr_shutdown(void);
// Modifiers SteamVR can import for a DRM format. Returns the count (at most max).
int ft_vr_modifiers(uint32_t format, uint64_t *out, int max);
// The screens are showing (by the visibility mode; not counting a wrist-pinned screen).
bool ft_vr_screens_shown(void);
// A panel for screen `index`, width in metres, placed in a row in front of the head.
void ft_vr_screen_create(int index, double metres, int count);
void ft_vr_screen_destroy(int index);
// Show a client buffer (identified by `key`) on the screen's panel. False if SteamVR
// can't import it.
bool ft_vr_screen_present(int index, const void *key, const struct ft_dmabuf *buf);
// A buffer is going away: drop its import.
void ft_vr_forget(const void *key);
// Poll panel input and SteamVR events.
void ft_vr_poll(void (*handle)(const struct ft_event *, void *), void *data);
// A command from the control socket (@ft_screens); writes the reply (see vr.cpp).
void ft_vr_command(const char *command, char *reply, int reply_size);
#ifdef __cplusplus
}
#endif