From 001780419373bc1fddf7f74031dd5416e76dde21 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cle=CC=81ment=20Grennerat?= <clement.grennerat@clgr.io>
Date: Sun, 14 Sep 2025 22:53:11 +0200
Subject: [PATCH] Char write using burst

---
 Core/Src/font.c | 37 +++++++++++++++++++------------------
 1 file changed, 19 insertions(+), 18 deletions(-)

diff --git a/Core/Src/font.c b/Core/Src/font.c
index 18bb37b..6ffb57d 100644
--- a/Core/Src/font.c
+++ b/Core/Src/font.c
@@ -22,7 +22,7 @@ void GFX_DrawChar(
   if (startX + glyph->width <= 0 || startX >= LCD_WIDTH) return;
   if (startY + glyph->height <= 0 || startY >= LCD_HEIGHT) return;
 
-//  LCD_Set_Address(startX, startY, startX + glyph->width - 1, startY + glyph->height - 1);
+  LCD_Set_Address(startX, startY, startX + glyph->width - 1, startY + glyph->height - 1);
   uint16_t pendingPixelCount = 0;
   uint8_t pendingPixelBit = 0;
 
@@ -33,25 +33,26 @@ void GFX_DrawChar(
       uint8_t bitIndex = bitPos % 8;
       uint8_t pixelBit = font->bitmaps[byteIndex] & (0x80 >> bitIndex);
 
-//      if(pixelBit == pendingPixelBit) {
-//        pendingPixelCount++;
-//      }else {
-//        if(pendingPixelCount != 0) {
-//          LCD_Draw_Colour_Burst(pendingPixelBit ? fg_color : bg_color, pendingPixelCount);
-//          pendingPixelCount = 0;
-//        }
-//        pendingPixelBit = pixelBit;
-//      }
-
-      uint16_t pixelColor = pixelBit ? fg_color : bg_color;
-
-      int16_t absX = startX + col;
-      int16_t absY = startY + row;
-
-      if (absX >= 0 && absX < LCD_WIDTH && absY >= 0 && absY < LCD_HEIGHT) {
-        LCD_Draw_Pixel(absX, absY, pixelColor);
+      if(pixelBit == pendingPixelBit) {
+        pendingPixelCount++;
+      }else {
+        if(pendingPixelCount != 0) {
+          LCD_Draw_Colour_Burst(pendingPixelBit ? fg_color : bg_color, pendingPixelCount);
+          pendingPixelCount = 1;
+        }
+        pendingPixelBit = pixelBit;
       }
 
+// Per pixel way: slower
+//      uint16_t pixelColor = pixelBit ? fg_color : bg_color;
+//
+//      int16_t absX = startX + col;
+//      int16_t absY = startY + row;
+//
+//      if (absX >= 0 && absX < LCD_WIDTH && absY >= 0 && absY < LCD_HEIGHT) {
+//        LCD_Draw_Pixel(absX, absY, pixelColor);
+//      }
+
       bitPos++;
     }
   }