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RGB Matrix layer key indicator (#14626)

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* Add layer key indicator example

* Update description

* Deobfuscate with index variable

* Add missing layer variable

* Correct color name and indicator function

* Function typo

* Place layer variable outside loops to save firmware space

Co-authored-by: filterpaper <filterpaper@localhost>
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Albert Y 2021-12-27 11:16:18 +08:00 committed by GitHub
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docs/feature_rgb_matrix.md
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@ -790,6 +790,26 @@ void rgb_matrix_indicators_advanced_user(uint8_t led_min, uint8_t led_max) {
}
```
Layer indicator with only configured keys:
```c
void rgb_matrix_indicators_advanced_user(uint8_t led_min, uint8_t led_max) {
if (get_highest_layer(layer_state) > 0) {
uint8_t layer = get_highest_layer(layer_state);
for (uint8_t row = 0; row < MATRIX_ROWS; ++row) {
for (uint8_t col = 0; col < MATRIX_COLS; ++col) {
uint8_t index = g_led_config.matrix_co[row][col];
if (index >= led_min && index <= led_max && index != NO_LED &&
keymap_key_to_keycode(layer, (keypos_t){col,row}) > KC_TRNS) {
rgb_matrix_set_color(index, RGB_GREEN);
}
}
}
}
}
```
#### Examples :id=indicator-examples
This example sets the modifiers to be a specific color based on the layer state. You can use a switch case here, instead, if you would like. This uses HSV and then converts to RGB, because this allows the brightness to be limited (important when using the WS2812 driver).