From cb4292dccfb7eba8d609c99727564b78dedc73e4 Mon Sep 17 00:00:00 2001
From: Rafal Kupiec <belliash@codingworkshop.eu.org>
Date: Sun, 10 Mar 2024 10:02:30 +0100
Subject: [PATCH] Allow to use custom framebuffer fonts

---
 sdk/xtdk/xtfw.h     |  1 +
 xtoskrnl/hl/efifb.c | 13 +++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/sdk/xtdk/xtfw.h b/sdk/xtdk/xtfw.h
index ec490e3b..ca518e76 100644
--- a/sdk/xtdk/xtfw.h
+++ b/sdk/xtdk/xtfw.h
@@ -102,6 +102,7 @@ typedef struct _LOADER_GRAPHICS_INFORMATION_BLOCK
     UINT PixelsPerScanLine;
     UINT BitsPerPixel;
     UINT Pitch;
+    PVOID Font;
 } LOADER_GRAPHICS_INFORMATION_BLOCK, *PLOADER_GRAPHICS_INFORMATION_BLOCK;
 
 /* Boot Loader information block */
diff --git a/xtoskrnl/hl/efifb.c b/xtoskrnl/hl/efifb.c
index ba2b5b89..d110f0ec 100644
--- a/xtoskrnl/hl/efifb.c
+++ b/xtoskrnl/hl/efifb.c
@@ -7,6 +7,7 @@
  */
 
 #include <xtos.h>
+#include <xtfont.h>
 
 
 /**
@@ -108,6 +109,18 @@ HlInitializeFrameBuffer(VOID)
         return STATUS_DEVICE_NOT_READY;
     }
 
+    /* Check if custom font provided by bootloader */
+    if(KeInitializationBlock->LoaderInformation.FrameBuffer.Font)
+    {
+        /* Use custom font */
+        HlpFrameBufferData.Font = KeInitializationBlock->LoaderInformation.FrameBuffer.Font;
+    }
+    else
+    {
+        /* Use default font */
+        HlpFrameBufferData.Font = (PVOID)&XtFbDefaultFont;
+    }
+
     /* Save framebuffer information and mark display as initialized */
     HlpFrameBufferData.Address = KeInitializationBlock->LoaderInformation.FrameBuffer.Address;
     HlpFrameBufferData.Width = KeInitializationBlock->LoaderInformation.FrameBuffer.Width;