Miami Sunset RGB theme.

keyboards/massdrop/alt/alt.c

@@ -0,0 +1,21 @@
+#include "alt.h"
+
+void matrix_init_kb(void) {
+    // Define initial values for the RGB configuration.
+    rgb_matrix_config.hsv.h = RGB_MATRIX_STARTUP_HUE;
+    rgb_matrix_config.speed = RGB_MATRIX_STARTUP_SPD;
+    eeconfig_init_user();
+}
+
+#ifdef CONSOLE_ENABLE
+bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
+    // put your per-action keyboard code here
+    // runs for every action, just before processing by the firmware
+
+    if (!record->event.pressed) {
+        dprintf("RGB: hue: %u, sat: %u, val: %u, spd: %u, mode: %u\n", rgb_matrix_config.hsv.h, rgb_matrix_config.hsv.s, rgb_matrix_config.hsv.v, rgb_matrix_config.speed, rgb_matrix_config.mode);
+    }
+
+    return process_record_user(keycode, record);
+}
+#endif

keyboards/massdrop/alt/config.h

@@ -124,4 +124,19 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGB_MATRIX_LED_PROCESS_LIMIT 15
 #define RGB_MATRIX_LED_FLUSH_LIMIT 10
 
+// Load our custom RGB by default
+#define RGB_MATRIX_STARTUP_MODE RGB_MATRIX_CUSTOM_RGB_CUSTOM
+
+#define RGB_MATRIX_STARTUP_HUE 136 // blue-magenta
+#define RGB_MATRIX_STARTUP_SPD 48
+
+#define RGB_MATRIX_UNDERGLOW_OFFSET_HUE 0-RGB_MATRIX_STARTUP_HUE // red-orange
+#define RGB_MATRIX_UNDERGLOW_OFFSET_SPD 14-RGB_MATRIX_STARTUP_SPD
+
+#define RGB_MATRIX_REACTIVE_HIGHLIGHT {80, 255, 0} // GRB!!!!
+#define RGB_MATRIX_REACTIVE_CROSS_SPEED 60
+#define RGB_MATRIX_REACTIVE_SIMPLE_SPEED 36
+// This effectively delays the fadout of the keys, max value 254
+#define RGB_MATRIX_REACTIVE_SIMPLE_THRESHOLD 100
+
 #include "config_led.h"

keyboards/massdrop/alt/rgb_matrix_kb.inc

@@ -0,0 +1,185 @@
+// !!! DO NOT ADD #pragma once !!! //
+
+// Step 1.
+// Declare custom effects using the RGB_MATRIX_EFFECT macro
+// (note the lack of semicolon after the macro!)
+RGB_MATRIX_EFFECT(RGB_CUSTOM)
+RGB_MATRIX_EFFECT(RGB_CUSTOM_MULTICROSS)
+RGB_MATRIX_EFFECT(RGB_CUSTOM_SOLID_REACTIVE_SIMPLE)
+RGB_MATRIX_EFFECT(RGB_CUSTOM_CYCLE)
+
+// Step 2.
+// Define effects inside the `RGB_MATRIX_CUSTOM_EFFECT_IMPLS` ifdef block
+#ifdef RGB_MATRIX_CUSTOM_EFFECT_IMPLS
+
+static uint8_t gradient_hue(uint8_t i) {
+    /* Calculate the custom gradient, and apply an offset gradient to the underglow. */
+
+    // The x range will be 0..224, map this to 0..7
+    // Relies on hue being 8-bit and wrapping
+    uint8_t hue   = rgb_matrix_config.hsv.h;
+    uint8_t speed = rgb_matrix_config.speed;
+
+    if (HAS_FLAGS(g_led_config.flags[i], LED_FLAG_UNDERGLOW)) {
+        // Shift the underglow colour.
+        hue   += RGB_MATRIX_UNDERGLOW_OFFSET_HUE;
+        speed += RGB_MATRIX_UNDERGLOW_OFFSET_SPD;
+        #ifdef RGB_MATRIX_BLEND_SQRT
+            uint8_t scale = scale8(64, speed);
+            return hue + (scale * g_led_config.point[i].x >> 5);
+        #endif
+    }
+    uint8_t scale = scale8(64, speed);
+
+    #ifdef RGB_MATRIX_BLEND_SQRT
+        int16_t offset16 = g_led_config.point[i].x - 112;  // -112 -> 112
+        offset16         = offset16 * 112;
+        if (offset16 < 0) {
+            offset16 = -sqrt16(-offset16);
+        } else {
+            offset16 = sqrt16(offset16);
+        }
+        uint8_t offset = offset16 + 112;
+        return hue + (scale * offset >> 5);
+    #else
+        return hue + (scale * g_led_config.point[i].x >> 5);
+    #endif
+}
+
+static bool RGB_CUSTOM(effect_params_t* params) {
+    RGB_MATRIX_USE_LIMITS(led_min, led_max);
+
+    HSV hsv = rgb_matrix_config.hsv;
+    for (uint8_t i = led_min; i < led_max; i++) {
+        RGB_MATRIX_TEST_LED_FLAGS();
+
+        hsv.h   = gradient_hue(i);
+        RGB rgb = hsv_to_rgb(hsv);
+
+        rgb_matrix_set_color(i, rgb.r, rgb.g, rgb.b);
+    }
+    return led_max < DRIVER_LED_TOTAL;
+}
+
+static bool RGB_CUSTOM_CYCLE(effect_params_t* params) {
+    RGB_MATRIX_USE_LIMITS(led_min, led_max);
+
+    HSV hsv = rgb_matrix_config.hsv;
+    for (uint8_t i = led_min; i < led_max; i++) {
+        RGB_MATRIX_TEST_LED_FLAGS();
+
+        hsv.h   = gradient_hue(i);
+        hsv.h  += scale16by8(g_rgb_counters.tick, rgb_matrix_config.speed / 24);
+        RGB rgb = hsv_to_rgb(hsv);
+
+        rgb_matrix_set_color(i, rgb.r, rgb.g, rgb.b);
+    }
+    return led_max < DRIVER_LED_TOTAL;
+}
+
+typedef RGB (*custom_reactive_splash_f)(RGB rgb, int16_t dx, int16_t dy, uint8_t dist, uint16_t tick);
+
+static bool custom_effect_runner_reactive_splash(uint8_t start, effect_params_t* params, custom_reactive_splash_f effect_func) {
+    RGB_MATRIX_USE_LIMITS(led_min, led_max);
+
+    uint8_t count = g_last_hit_tracker.count;
+    for (uint8_t i = led_min; i < led_max; i++) {
+        RGB_MATRIX_TEST_LED_FLAGS();
+        HSV hsv = rgb_matrix_config.hsv;
+
+        // Calculate the base gradient colour.
+        hsv.h   = gradient_hue(i);
+        RGB rgb = hsv_to_rgb(hsv);
+
+        for (uint8_t j = start; j < count; j++) {
+            if (g_last_hit_tracker.tick[j] > 2000) continue; // Optimise for keys which are long-expired.
+            int16_t  dx   = g_led_config.point[i].x - g_last_hit_tracker.x[j];
+            int16_t  dy   = g_led_config.point[i].y - g_last_hit_tracker.y[j];
+            uint8_t  dist = sqrt16(dx * dx + dy * dy);
+            uint16_t tick = scale16by8(g_last_hit_tracker.tick[j], RGB_MATRIX_REACTIVE_CROSS_SPEED);
+            rgb           = effect_func(rgb, dx, dy, dist, tick);
+        }
+
+        rgb_matrix_set_color(i, rgb.r, rgb.g, rgb.b);
+    }
+    return led_max < DRIVER_LED_TOTAL;
+}
+
+typedef RGB (*custom_reactive_f)(RGB rgb, uint16_t offset);
+
+static bool custom_effect_runner_reactive(effect_params_t* params, custom_reactive_f effect_func) {
+    RGB_MATRIX_USE_LIMITS(led_min, led_max);
+
+    uint16_t max_tick = 65535 / RGB_MATRIX_REACTIVE_SIMPLE_SPEED;
+    for (uint8_t i = led_min; i < led_max; i++) {
+        RGB_MATRIX_TEST_LED_FLAGS();
+        uint16_t tick = max_tick;
+        // Reverse search to find most recent key hit
+        for (int8_t j = g_last_hit_tracker.count - 1; j >= 0; j--) {
+            if (g_last_hit_tracker.index[j] == i && g_last_hit_tracker.tick[j] < tick) {
+                tick = g_last_hit_tracker.tick[j];
+                break;
+            }
+        }
+        HSV hsv = rgb_matrix_config.hsv;
+
+        // Calculate the base gradient colour
+        hsv.h   = gradient_hue(i);
+        RGB rgb = hsv_to_rgb(hsv);
+
+        uint16_t offset = scale16by8(tick, RGB_MATRIX_REACTIVE_SIMPLE_SPEED);
+        rgb             = effect_func(rgb, offset);
+        rgb_matrix_set_color(i, rgb.r, rgb.g, rgb.b);
+    }
+    return led_max < DRIVER_LED_TOTAL;
+}
+
+static RGB rgb_sqrt_blend(RGB a, RGB b, uint8_t t) {
+    RGB rgb;
+    // Compress the effect so the highlight is more pronounced
+    t     = t * t / 255;
+    // Blend RGB channels
+    rgb.r = sqrt16(scale16by8(a.r * a.r, (255 - t)) + scale16by8(b.r * b.r, t));
+    rgb.g = sqrt16(scale16by8(a.g * a.g, (255 - t)) + scale16by8(b.g * b.g, t));
+    rgb.b = sqrt16(scale16by8(a.b * a.b, (255 - t)) + scale16by8(b.b * b.b, t));
+
+    return rgb;
+}
+
+static RGB CUSTOM_SOLID_REACTIVE_CROSS_math(RGB bg, int16_t dx, int16_t dy, uint8_t dist, uint16_t tick) {
+    uint16_t effect = tick - dist;
+    // effect = 0 fully highlighted, 255 fully faded
+    if (effect >= 255 || dist > 54) return bg; // effect size, default=72
+    if ((dx > 8 || dx < -8) && (dy > 8 || dy < -8)) return bg; // effect spread, default=8
+
+    // if (rand()/RAND_MAX < 0.0001) dprintf("effect: %u\n", effect);
+
+    // Blend highlight over the gradient colour
+    RGB fg = RGB_MATRIX_REACTIVE_HIGHLIGHT;
+    bg     = rgb_sqrt_blend(fg, bg, effect);
+    return bg;
+}
+
+static bool RGB_CUSTOM_MULTICROSS(effect_params_t* params) {
+    return custom_effect_runner_reactive_splash(qsub8(g_last_hit_tracker.count, 12),  // Use only the previous 12 key samples for performance
+                                                params, &CUSTOM_SOLID_REACTIVE_CROSS_math);
+}
+
+static RGB CUSTOM_SOLID_REACTIVE_SIMPLE_math(RGB bg, uint16_t effect) {
+    // effect = 0 fully highlighted, 255 fully faded
+    if (effect >= 255) return bg;
+
+    // Hold the effect after initial keypress for a short time
+    uint8_t shifted = qsub8(effect, RGB_MATRIX_REACTIVE_SIMPLE_THRESHOLD);
+    effect          = shifted * 255 / (255 - RGB_MATRIX_REACTIVE_SIMPLE_THRESHOLD);
+    // if (rand()/RAND_MAX < 0.0001) dprintf("shifted: %u, effect: %u\n", shifted, effect);
+
+    // Blend highlight over the gradient colour
+    RGB fg = RGB_MATRIX_REACTIVE_HIGHLIGHT;
+    bg = rgb_sqrt_blend(fg, bg, effect);
+    return bg;
+}
+
+static bool RGB_CUSTOM_SOLID_REACTIVE_SIMPLE(effect_params_t* params) { return custom_effect_runner_reactive(params, &CUSTOM_SOLID_REACTIVE_SIMPLE_math); }
+
+#endif  // RGB_MATRIX_CUSTOM_EFFECT_IMPLS

keyboards/massdrop/alt/rules.mk

@@ -35,4 +35,7 @@ AUTO_SHIFT_ENABLE = no      # Auto Shift
 # Custom RGB matrix handling
 RGB_MATRIX_ENABLE = custom
 
+# Enable custom RGB effects
+RGB_MATRIX_CUSTOM_KB = yes
+
 LAYOUTS = 65_ansi_blocker