From 3eae5061a4511e347ee94cae3ff364f08f258813 Mon Sep 17 00:00:00 2001
From: Sebastian Nieto <sebanieto@gmail.com>
Date: Mon, 21 Sep 2026 23:54:50 -0300
Subject: [PATCH] fix(ui): resolver reinicio por falta de RAM limitando sprite
 a 25KB y ralentizar transicion a 16 cuadros suaves

---
 sketch/obd2_gauge/meter.h | 36 +++++++++++++++++-------------------
 1 file changed, 17 insertions(+), 19 deletions(-)

diff --git a/sketch/obd2_gauge/meter.h b/sketch/obd2_gauge/meter.h
index 58fde35..8d1afae 100644
--- a/sketch/obd2_gauge/meter.h
+++ b/sketch/obd2_gauge/meter.h
@@ -1276,12 +1276,10 @@ inline void renderPage0ToSprite(TFT_eSprite &s, int x_offset, int y_slice, int s
     }
 
     String numStr = (val <= -900.0f) ? "---" : String(val, digit);
-    s.loadFont(DSEG7_Modern_BoldItalic_34);
     s.setTextColor(priCol, bgCol);
     s.setTextPadding(114);
     s.drawRightString(numStr.c_str(), qx + 152, qy + 70, 1);
     s.setTextPadding(0);
-    s.unloadFont();
   }
 
   // Crosshair dividers
@@ -1356,12 +1354,10 @@ inline void renderPage1ToSprite(TFT_eSprite &s, int x_offset, int y_slice, int s
 
     // Value text
     String numStr = (val <= -900.0f) ? "---" : (isInt ? String((int)val) : String(val, 1));
-    s.loadFont(DSEG7_Modern_BoldItalic_34);
     s.setTextColor(accentCol, cardBg);
     s.setTextPadding(100);
     s.drawRightString(numStr.c_str(), cardX + 262, cardY + 22, 1);
     s.setTextPadding(0);
-    s.unloadFont();
 
     s.setTextColor(0xC618, cardBg);
     s.drawString("`C", cardX + 268, cardY + 32, 2);
@@ -1369,23 +1365,23 @@ inline void renderPage1ToSprite(TFT_eSprite &s, int x_offset, int y_slice, int s
 }
 
 // 100% Flicker-Free Double-Buffered Mobile Slide Transition
+// Safe 25KB sprite with single font load and smooth ease-out pacing
 inline void animateSlideTransition(bool swipeLeft) {
-  touchBeep();
+  const int slice_h = 40; // 320x40 = only 25KB (100% safe, leaves 70KB+ free for Bluetooth)
+  const uint8_t numSlices = 240 / slice_h; // exactly 6 slices
 
   TFT_eSprite spr(&tft);
-  int slice_h = 240;
-  // Try 320x240 full double-buffer first; if heap is tight, allocate two 320x120 slices
-  if (spr.createSprite(320, 240) == nullptr) {
-    slice_h = 120;
-    if (spr.createSprite(320, 120) == nullptr) {
-      return; // Fallback: switch instantly without crashing if RAM is fully depleted
-    }
+  if (spr.createSprite(320, slice_h) == nullptr) {
+    return; // Safety fallback
   }
 
-  const uint8_t FRAMES = 10;
-  // Smooth cubic ease-out deceleration curve
-  const int16_t step_shifts[FRAMES] = { 45, 92, 140, 186, 228, 264, 290, 308, 317, 320 };
-  uint8_t numSlices = (slice_h == 240) ? 1 : 2;
+  spr.loadFont(DSEG7_Modern_BoldItalic_34); // Loaded ONCE before animation loop!
+
+  const uint8_t FRAMES = 16;
+  // Cubic ease-out deceleration curve over 16 frames: smooth, visible and elegant
+  const int16_t step_shifts[FRAMES] = {
+    28, 62, 102, 144, 184, 218, 246, 268, 284, 296, 305, 311, 315, 318, 319, 320
+  };
 
   for (uint8_t f = 0; f < FRAMES; f++) {
     int16_t shift = step_shifts[f];
@@ -1420,14 +1416,16 @@ inline void animateSlideTransition(bool swipeLeft) {
         spr.fillCircle(167, 2, 2, (splitX <= 160) ? getThemePrimaryColor() : 0x5AEB);
       }
 
-      // Direct single SPI push: ZERO visual flicker!
+      // Direct single SPI push per slice: ZERO visual flicker!
       spr.pushSprite(0, y_slice);
     }
 
-    delay(8);
+    yield();   // Feed watchdog and give Bluetooth scheduler CPU cycles
+    delay(14); // Pacing for smooth, readable transition (~360ms total)
   }
 
-  spr.deleteSprite();
+  spr.unloadFont();   // Unload font once at the end
+  spr.deleteSprite(); // Release the 25KB
 }
 
 /*-------------------*/