khadzhibekovpa
292d61bb47
CI / build-and-test (push) Canceled after 0s
Semi-transparent always-on-top Windows overlay that shows the keymap of a Vial/QMK split keyboard (Silakka54). - draws all layers from a Vial .vil layout, transparent keys fall through - detects the active layer from the keyboard via a Raw HID command (firmware/) - shows characters of the active Windows input language - can split the two halves into separate, independently movable windows - highlights pressed keys; tray menu for opacity, size and options - Inno Setup installer and portable build; GitHub-style CI workflow
32 lines
1.1 KiB
C
32 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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//
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// KeyOverlay: lets the host ask which layer is active.
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//
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// Request (host -> keyboard): [0xE0, 0x01, ...]
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// Response (keyboard -> host): [0xE0, 0x01, highest_layer, layer_state (u32 LE), default_layer_state (u32 LE), ...]
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//
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// 0xE0 is outside the ids used by VIA (0x01..0x1F), Vial (0xFE) and "unhandled" (0xFF).
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// Only reads state; it changes nothing on the keyboard and works while Vial is locked.
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#include QMK_KEYBOARD_H
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#include "raw_hid.h"
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#include <string.h>
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#define KEYOVERLAY_CMD 0xE0
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#define KEYOVERLAY_PROTOCOL 0x01
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#define KEYOVERLAY_ID_UNHANDLED 0xFF
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#define KEYOVERLAY_MIN_LENGTH 11
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void raw_hid_receive_kb(uint8_t *data, uint8_t length) {
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if (data[0] != KEYOVERLAY_CMD || length < KEYOVERLAY_MIN_LENGTH) {
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data[0] = KEYOVERLAY_ID_UNHANDLED;
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return;
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}
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const uint32_t active = (uint32_t)layer_state;
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const uint32_t default_ = (uint32_t)default_layer_state;
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data[1] = KEYOVERLAY_PROTOCOL;
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data[2] = get_highest_layer(layer_state | default_layer_state);
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memcpy(&data[3], &active, sizeof(active));
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memcpy(&data[7], &default_, sizeof(default_));
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}
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