From f68c66f356c08a829c4b37e63cbf5d9ee005c2f2 Mon Sep 17 00:00:00 2001
From: Fisch <interfisch@gmx.net>
Date: Sat, 25 Nov 2023 14:58:31 +0100
Subject: [PATCH] calculate character spacing

---
 flipcontrol_esp32/src/image.cpp | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/flipcontrol_esp32/src/image.cpp b/flipcontrol_esp32/src/image.cpp
index fe11f66..17e3504 100644
--- a/flipcontrol_esp32/src/image.cpp
+++ b/flipcontrol_esp32/src/image.cpp
@@ -53,17 +53,25 @@ void Image::addBuffer_text(String text,uint8_t xoffset, uint8_t yoffset)
         char currentchar=text.charAt(textpos);
         Serial.print("Current Char "); Serial.print((uint8_t)currentchar); Serial.print(":"); Serial.println(currentchar);
         
-        for (uint8_t x=0;x<6;x++) {
+        uint8_t emptycolumncounter=0; //count how many empty trailing columns for a character
+        for (uint8_t x=0;x<font_width;x++) {
             uint16_t addBuffer;
             if (currentchar==' ') { //space
                 addBuffer=0; //empty
             }else{
                 addBuffer=( (uint16_t)( font_minecraftia[(uint8_t)currentchar-font_offset][x] ) << yoffset);
+                if (addBuffer==0) {
+                    emptycolumncounter++;
+                }else{
+                    emptycolumncounter=0; //reset
+                }
             }
             backBuffer[bufferxpos]|= addBuffer;
             Serial.print("Buffer at "); Serial.print(bufferxpos); Serial.print(" add ");Serial.print(addBuffer,2); Serial.print(" result="); Serial.println(backBuffer[bufferxpos],2);
-            bufferxpos++; //TODO: do not increment when font column is empty
+
+            bufferxpos++; 
         }
+        bufferxpos-= emptycolumncounter-font_spacing; //remove trailing empty columns except one
     }
     Serial.println("Finished Text");
 }