From d5edba1fc21df0d2a2e4c2a00a4bfe796e5586b7 Mon Sep 17 00:00:00 2001
From: Armel FAUVEAU <armel.fauveau@globalis-ms.com>
Date: Mon, 27 Apr 2026 06:10:44 +0200
Subject: [PATCH] Add UI_PrintStringYOffset to shift big-font

---
 App/ui/helper.c | 40 ++++++++++++++++++++++++++++++++++++++++
 App/ui/helper.h |  1 +
 App/ui/main.c   |  8 +++++---
 3 files changed, 46 insertions(+), 3 deletions(-)

diff --git a/App/ui/helper.c b/App/ui/helper.c
index a0edd501..a21ca34f 100644
--- a/App/ui/helper.c
+++ b/App/ui/helper.c
@@ -98,6 +98,46 @@ void UI_PrintString(const char *pString, uint8_t Start, uint8_t End, uint8_t Lin
     }
 }
 
+// Same as UI_PrintString but shifts the glyph down by YOffset pixels (0..7).
+// When YOffset > 0, a third page (Line+2) is also written. Bits are OR-ed
+// so existing framebuffer content outside the glyph footprint is preserved.
+void UI_PrintStringYOffset(const char *pString, uint8_t Start, uint8_t End, uint8_t Line, uint8_t Width, uint8_t YOffset)
+{
+    size_t i;
+    size_t Length = strlen(pString);
+
+    if (End > Start)
+        Start += (((End - Start) - (Length * Width)) + 1) / 2;
+
+    YOffset &= 7;
+
+    for (i = 0; i < Length; i++)
+    {
+        const unsigned int ofs = (unsigned int)Start + (i * Width);
+        if (pString[i] > ' ' && pString[i] < 127)
+        {
+            const unsigned int index = pString[i] - ' ' - 1;
+
+            if (YOffset == 0)
+            {
+                memcpy(gFrameBuffer[Line + 0] + ofs, &gFontBig[index][0], 7);
+                memcpy(gFrameBuffer[Line + 1] + ofs, &gFontBig[index][7], 7);
+            }
+            else
+            {
+                for (unsigned int x = 0; x < 7; x++)
+                {
+                    const uint8_t top = gFontBig[index][x];
+                    const uint8_t bot = gFontBig[index][7 + x];
+                    gFrameBuffer[Line + 0][ofs + x] |= (uint8_t)(top << YOffset);
+                    gFrameBuffer[Line + 1][ofs + x] |= (uint8_t)(top >> (8 - YOffset)) | (uint8_t)(bot << YOffset);
+                    gFrameBuffer[Line + 2][ofs + x] |= (uint8_t)(bot >> (8 - YOffset));
+                }
+            }
+        }
+    }
+}
+
 void UI_PrintStringSmall(const char *pString, uint8_t Start, uint8_t End, uint8_t Line, uint8_t char_width, const uint8_t *font)
 {
     const size_t Length = strlen(pString);
diff --git a/App/ui/helper.h b/App/ui/helper.h
index 0002f2cb..ccd5da05 100644
--- a/App/ui/helper.h
+++ b/App/ui/helper.h
@@ -23,6 +23,7 @@
 void UI_GenerateChannelString(char *pString, const uint16_t Channel);
 void UI_GenerateChannelStringEx(char *pString, const bool bShowPrefix, const uint16_t ChannelNumber);
 void UI_PrintString(const char *pString, uint8_t Start, uint8_t End, uint8_t Line, uint8_t Width);
+void UI_PrintStringYOffset(const char *pString, uint8_t Start, uint8_t End, uint8_t Line, uint8_t Width, uint8_t YOffset);
 void UI_PrintStringSmallNormal(const char *pString, uint8_t Start, uint8_t End, uint8_t Line);
 void UI_PrintStringSmallNormalInverse(const char *pString, uint8_t Start, uint8_t End, uint8_t Line);
 void UI_PrintStringSmallBold(const char *pString, uint8_t Start, uint8_t End, uint8_t Line);
diff --git a/App/ui/main.c b/App/ui/main.c
index 576fa0fa..baa6b9cb 100644
--- a/App/ui/main.c
+++ b/App/ui/main.c
@@ -1597,7 +1597,8 @@ void UI_DisplayMain(void)
 
                     case MDF_CHANNEL:   // show the channel number
                         sprintf(String, "CH-%04u", gEeprom.ScreenChannel[vfo_num] + 1);
-                        UI_PrintString(String, 36, 0, line, 8);
+                        //UI_PrintString(String, 36, 0, line, 8);
+                        UI_PrintStringYOffset(String, 36, 0, line, 8, 3);
                         break;
 
                     case MDF_NAME:      // show the channel name
@@ -1611,14 +1612,15 @@ void UI_DisplayMain(void)
 
                         if (gEeprom.CHANNEL_DISPLAY_MODE == MDF_NAME) {
                             String[10] = 0;
-                            UI_PrintString(String, 33, 0, line, 8);
+                            UI_PrintStringYOffset(String, 33, 0, line, 8, 3);
                         }
                         else {
 #ifdef ENABLE_FEAT_F4HWN
                             if (isMainOnly())
                             {
                                 String[10] = 0;
-                                UI_PrintString(String, 33, 0, line, 8);
+                                //UI_PrintString(String, 33, 0, line, 8);
+                                UI_PrintStringYOffset(String, 33, 0, line, 8, 3);
                             }
                             else
                             {