From d12a68a49dcff9baf75ed23636f374c69a6c10c4 Mon Sep 17 00:00:00 2001
From: Bodmer <bodmer@anola.net>
Date: Sun, 21 Oct 2018 21:57:30 +0100
Subject: [PATCH] Add checks in examples for missing font files

---
 examples/Smooth Fonts/Font_Demo_1/Font_Demo_1.ino | 12 ++++++++++++
 examples/Smooth Fonts/Font_Demo_2/Font_Demo_2.ino | 12 ++++++++++++
 examples/Smooth Fonts/Font_Demo_3/Font_Demo_3.ino | 13 +++++++++++++
 examples/Smooth Fonts/Font_Demo_4/Font_Demo_4.ino | 12 ++++++++++++
 4 files changed, 49 insertions(+)

diff --git a/examples/Smooth Fonts/Font_Demo_1/Font_Demo_1.ino b/examples/Smooth Fonts/Font_Demo_1/Font_Demo_1.ino
index 0d24af9..e38a5ee 100644
--- a/examples/Smooth Fonts/Font_Demo_1/Font_Demo_1.ino	
+++ b/examples/Smooth Fonts/Font_Demo_1/Font_Demo_1.ino	
@@ -59,6 +59,18 @@ void setup(void) {
     while (1) yield(); // Stay here twiddling thumbs waiting
   }
   Serial.println("\r\nSPIFFS available!");
+  
+  // ESP32 will crash if any of the fonts are missing
+  bool font_missing = false;
+  if (SPIFFS.exists("/NotoSansBold15.vlw")    == false) font_missing = true;
+  if (SPIFFS.exists("/NotoSansBold36.vlw")    == false) font_missing = true;
+
+  if (font_missing)
+  {
+    Serial.println("\r\nFont missing in SPIFFS, did you upload it?");
+    while(1) yield();
+  }
+  else Serial.println("\r\nFonts found OK.");
 }
 
 
diff --git a/examples/Smooth Fonts/Font_Demo_2/Font_Demo_2.ino b/examples/Smooth Fonts/Font_Demo_2/Font_Demo_2.ino
index 7eca0be..a2ef436 100644
--- a/examples/Smooth Fonts/Font_Demo_2/Font_Demo_2.ino	
+++ b/examples/Smooth Fonts/Font_Demo_2/Font_Demo_2.ino	
@@ -53,6 +53,18 @@ void setup(void) {
     while (1) yield(); // Stay here twiddling thumbs waiting
   }
   Serial.println("\r\nSPIFFS available!");
+
+  // ESP32 will crash if any of the fonts are missing
+  bool font_missing = false;
+  if (SPIFFS.exists("/NotoSansBold15.vlw")    == false) font_missing = true;
+  if (SPIFFS.exists("/NotoSansBold36.vlw")    == false) font_missing = true;
+
+  if (font_missing)
+  {
+    Serial.println("\r\nFont missing in SPIFFS, did you upload it?");
+    while(1) yield();
+  }
+  else Serial.println("\r\nFonts found OK.");
 }
 
 void loop() {
diff --git a/examples/Smooth Fonts/Font_Demo_3/Font_Demo_3.ino b/examples/Smooth Fonts/Font_Demo_3/Font_Demo_3.ino
index 5214264..ebc2055 100644
--- a/examples/Smooth Fonts/Font_Demo_3/Font_Demo_3.ino	
+++ b/examples/Smooth Fonts/Font_Demo_3/Font_Demo_3.ino	
@@ -57,6 +57,19 @@ void setup(void) {
     while (1) yield(); // Stay here twiddling thumbs waiting
   }
   Serial.println("\r\nSPIFFS available!");
+
+  // ESP32 will crash if any of the fonts are missing
+  bool font_missing = false;
+  if (SPIFFS.exists("/NotoSansBold15.vlw")    == false) font_missing = true;
+  if (SPIFFS.exists("/NotoSansBold36.vlw")    == false) font_missing = true;
+  if (SPIFFS.exists("/NotoSansMonoSCB20.vlw") == false) font_missing = true;
+
+  if (font_missing)
+  {
+    Serial.println("\r\nFont missing in SPIFFS, did you upload it?");
+    while(1) yield();
+  }
+  else Serial.println("\r\nFonts found OK.");
 }
 
 void loop() {
diff --git a/examples/Smooth Fonts/Font_Demo_4/Font_Demo_4.ino b/examples/Smooth Fonts/Font_Demo_4/Font_Demo_4.ino
index f8ce4c1..edad83c 100644
--- a/examples/Smooth Fonts/Font_Demo_4/Font_Demo_4.ino	
+++ b/examples/Smooth Fonts/Font_Demo_4/Font_Demo_4.ino	
@@ -68,6 +68,18 @@ void setup(void) {
     while (1) yield(); // Stay here twiddling thumbs waiting
   }
   Serial.println("\r\nSPIFFS available!");
+
+  // ESP32 will crash if any of the fonts are missing
+  bool font_missing = false;
+  if (SPIFFS.exists("/NotoSansBold15.vlw")    == false) font_missing = true;
+  if (SPIFFS.exists("/NotoSansBold36.vlw")    == false) font_missing = true;
+
+  if (font_missing)
+  {
+    Serial.println("\r\nFont missing in SPIFFS, did you upload it?");
+    while(1) yield();
+  }
+  else Serial.println("\r\nFonts found OK.");
 }
 
 void loop() {