RGB Matrix Typing Heatmap (#5786)

* RGB Matrix Typing Heatmap Effect

* Fixing file name and effect init

2 files changed, 93 insertions, 15 deletions

diff --git a/quantum/rgb_matrix_animations/digital_rain_anim.h b/quantum/rgb_matrix_animations/digital_rain_anim.h
index 4ba3c1c87d..6ccba392aa 100644
--- a/quantum/rgb_matrix_animations/digital_rain_anim.h
+++ b/quantum/rgb_matrix_animations/digital_rain_anim.h
@@ -1,11 +1,13 @@
 #pragma once
-#ifndef DISABLE_RGB_MATRIX_DIGITAL_RAIN
+#if defined(RGB_MATRIX_FRAMEBUFFER_EFFECTS) && !defined(DISABLE_RGB_MATRIX_DIGITAL_RAIN)
 
 #ifndef RGB_DIGITAL_RAIN_DROPS
     // lower the number for denser effect/wider keyboard
     #define RGB_DIGITAL_RAIN_DROPS 24
 #endif
 
+extern uint8_t rgb_frame_buffer[MATRIX_ROWS][MATRIX_COLS];
+
 bool rgb_matrix_digital_rain(effect_params_t* params) {
   // algorithm ported from https://github.com/tremby/Kaleidoscope-LEDEffect-DigitalRain
   const uint8_t drop_ticks           = 28;
@@ -13,24 +15,24 @@ bool rgb_matrix_digital_rain(effect_params_t* params) {
   const uint8_t max_brightness_boost = 0xc0;
   const uint8_t max_intensity        = 0xff;
 
-  static uint8_t map[MATRIX_COLS][MATRIX_ROWS] = {{0}};
   static uint8_t drop = 0;
 
   if (params->init) {
     rgb_matrix_set_color_all(0, 0, 0);
-    memset(map, 0, sizeof map);
+    memset(rgb_frame_buffer, 0, sizeof rgb_frame_buffer);
     drop = 0;
   }
+
   for (uint8_t col = 0; col < MATRIX_COLS; col++) {
     for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
       if (row == 0 && drop == 0 && rand() < RAND_MAX / RGB_DIGITAL_RAIN_DROPS) {
         // top row, pixels have just fallen and we're
         // making a new rain drop in this column
-        map[col][row] = max_intensity;
+        rgb_frame_buffer[col][row] = max_intensity;
       }
-      else if (map[col][row] > 0 && map[col][row] < max_intensity) {
+      else if (rgb_frame_buffer[col][row] > 0 && rgb_frame_buffer[col][row] < max_intensity) {
         // neither fully bright nor dark, decay it
-        map[col][row]--;
+        rgb_frame_buffer[col][row]--;
       }
       // set the pixel colour
       uint8_t led[LED_HITS_TO_REMEMBER];
@@ -38,32 +40,33 @@ bool rgb_matrix_digital_rain(effect_params_t* params) {
 
       // TODO: multiple leds are supported mapped to the same row/column
       if (led_count > 0) {
-        if (map[col][row] > pure_green_intensity) {
-          const uint8_t boost = (uint8_t) ((uint16_t) max_brightness_boost * (map[col][row] - pure_green_intensity) / (max_intensity - pure_green_intensity));
+        if (rgb_frame_buffer[col][row] > pure_green_intensity) {
+          const uint8_t boost = (uint8_t) ((uint16_t) max_brightness_boost * (rgb_frame_buffer[col][row] - pure_green_intensity) / (max_intensity - pure_green_intensity));
           rgb_matrix_set_color(led[0], boost, max_intensity, boost);
         }
         else {
-          const uint8_t green = (uint8_t) ((uint16_t) max_intensity * map[col][row] / pure_green_intensity);
+          const uint8_t green = (uint8_t) ((uint16_t) max_intensity * rgb_frame_buffer[col][row] / pure_green_intensity);
           rgb_matrix_set_color(led[0], 0, green, 0);
         }
       }
     }
   }
+
   if (++drop > drop_ticks) {
     // reset drop timer
     drop = 0;
     for (uint8_t row = MATRIX_ROWS - 1; row > 0; row--) {
       for (uint8_t col = 0; col < MATRIX_COLS; col++) {
         // if ths is on the bottom row and bright allow decay
-        if (row == MATRIX_ROWS - 1 && map[col][row] == max_intensity) {
-          map[col][row]--;
+        if (row == MATRIX_ROWS - 1 && rgb_frame_buffer[col][row] == max_intensity) {
+          rgb_frame_buffer[col][row]--;
         }
         // check if the pixel above is bright
-        if (map[col][row - 1] == max_intensity) {
+        if (rgb_frame_buffer[col][row - 1] == max_intensity) {
           // allow old bright pixel to decay
-          map[col][row - 1]--;
+          rgb_frame_buffer[col][row - 1]--;
           // make this pixel bright
-          map[col][row] = max_intensity;
+          rgb_frame_buffer[col][row] = max_intensity;
         }
       }
     }
@@ -71,4 +74,4 @@ bool rgb_matrix_digital_rain(effect_params_t* params) {
   return false;
 }
 
-#endif // DISABLE_RGB_MATRIX_DIGITAL_RAIN
+#endif // defined(RGB_MATRIX_FRAMEBUFFER_EFFECTS) && !defined(DISABLE_RGB_MATRIX_DIGITAL_RAIN)
diff --git a/quantum/rgb_matrix_animations/typing_heatmap_anim.h b/quantum/rgb_matrix_animations/typing_heatmap_anim.h
new file mode 100644
index 0000000000..aade53fccc
--- /dev/null
+++ b/quantum/rgb_matrix_animations/typing_heatmap_anim.h
@@ -0,0 +1,75 @@
+#pragma once
+#if defined(RGB_MATRIX_FRAMEBUFFER_EFFECTS) && !defined(DISABLE_RGB_MATRIX_TYPING_HEATMAP)
+
+extern rgb_config_t rgb_matrix_config;
+extern uint8_t rgb_frame_buffer[MATRIX_ROWS][MATRIX_COLS];
+
+void process_rgb_matrix_typing_heatmap(keyrecord_t *record) {
+    uint8_t row = record->event.key.row;
+    uint8_t col = record->event.key.col;
+    uint8_t m_row = row - 1;
+    uint8_t p_row = row + 1;
+    uint8_t m_col = col - 1;
+    uint8_t p_col = col + 1;
+
+    if (m_col < col)
+      rgb_frame_buffer[row][m_col] = qadd8(rgb_frame_buffer[row][m_col], 16);
+    rgb_frame_buffer[row][col] = qadd8(rgb_frame_buffer[row][col], 32);
+    if (p_col < MATRIX_COLS)
+      rgb_frame_buffer[row][p_col] = qadd8(rgb_frame_buffer[row][p_col], 16);
+
+    if (p_row < MATRIX_ROWS) {
+      if (m_col < col)
+        rgb_frame_buffer[p_row][m_col] = qadd8(rgb_frame_buffer[p_row][m_col], 13);
+      rgb_frame_buffer[p_row][col] = qadd8(rgb_frame_buffer[p_row][col], 16);
+      if (p_col < MATRIX_COLS)
+        rgb_frame_buffer[p_row][p_col] = qadd8(rgb_frame_buffer[p_row][p_col], 13);
+    }
+
+    if (m_row < row) {
+      if (m_col < col)
+        rgb_frame_buffer[m_row][m_col] = qadd8(rgb_frame_buffer[m_row][m_col], 13);
+      rgb_frame_buffer[m_row][col] = qadd8(rgb_frame_buffer[m_row][col], 16);
+      if (p_col < MATRIX_COLS)
+        rgb_frame_buffer[m_row][p_col] = qadd8(rgb_frame_buffer[m_row][p_col], 13);
+    }
+}
+
+bool rgb_matrix_typing_heatmap(effect_params_t* params) {
+  // Modified version of RGB_MATRIX_USE_LIMITS to work off of matrix row / col size
+  uint8_t led_min = RGB_MATRIX_LED_PROCESS_LIMIT * params->iter;
+  uint8_t led_max = led_min + RGB_MATRIX_LED_PROCESS_LIMIT;
+  if (led_max > sizeof(rgb_frame_buffer))
+    led_max = sizeof(rgb_frame_buffer);
+
+  if (params->init) {
+    rgb_matrix_set_color_all(0, 0, 0);
+    memset(rgb_frame_buffer, 0, sizeof rgb_frame_buffer);
+  }
+
+  // Render heatmap & decrease
+  for (int i = led_min; i < led_max; i++) {
+    uint8_t row = i % MATRIX_ROWS;
+    uint8_t col = i / MATRIX_ROWS;
+    uint8_t val = rgb_frame_buffer[row][col];
+
+    // set the pixel colour
+    uint8_t led[LED_HITS_TO_REMEMBER];
+    uint8_t led_count = rgb_matrix_map_row_column_to_led(row, col, led);
+    for (uint8_t j = 0; j < led_count; ++j)
+    {
+      if (!HAS_ANY_FLAGS(g_led_config.flags[led[j]], params->flags))
+        continue;
+
+      HSV hsv = { 170 - qsub8(val, 85), rgb_matrix_config.sat, scale8((qadd8(170, val) - 170) * 3, rgb_matrix_config.val) };
+      RGB rgb = hsv_to_rgb(hsv);
+      rgb_matrix_set_color(led[j], rgb.r, rgb.g, rgb.b);
+    }
+
+    rgb_frame_buffer[row][col] = qsub8(val, 1);
+  }
+
+  return led_max < sizeof(rgb_frame_buffer);
+}
+
+#endif // defined(RGB_MATRIX_FRAMEBUFFER_EFFECTS) && !defined(DISABLE_RGB_MATRIX_TYPING_HEATMAP)