From 60eae7335b711e8d4be7d48ad2290141e04debe7 Mon Sep 17 00:00:00 2001
From: XScorpion2 <rcalt2vt@gmail.com>
Date: Tue, 7 May 2019 21:17:00 -0500
Subject: RGB Matrix Typing Heatmap (#5786)

* RGB Matrix Typing Heatmap Effect

* Fixing file name and effect init
---
 quantum/rgb_matrix_animations/digital_rain_anim.h | 33 ++++++++++++-----------
 1 file changed, 18 insertions(+), 15 deletions(-)

(limited to 'quantum/rgb_matrix_animations/digital_rain_anim.h')

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)
-- 
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