From 63fffe4e7227291ae5a74d0ee1b44ec2af0eff6a Mon Sep 17 00:00:00 2001
From: eric_tian <eric_tian@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Thu, 4 Jun 2009 13:50:14 +0000
Subject: [PATCH] fix the issue when passing a L"" string to PrintXY. 1.
 According to the value of RowInfoArraySize to get the actual number of
 printed line. 2. If RowInfoArraySize equates 0, then it means nothing is
 printed.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8464 6f19259b-4bc3-4df7-8a09-765794883524
---
 MdePkg/Library/UefiLib/UefiLibPrint.c | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/MdePkg/Library/UefiLib/UefiLibPrint.c b/MdePkg/Library/UefiLib/UefiLibPrint.c
index 9dc3a5a200..55487259fc 100644
--- a/MdePkg/Library/UefiLib/UefiLibPrint.c
+++ b/MdePkg/Library/UefiLib/UefiLibPrint.c
@@ -347,6 +347,9 @@ InternalPrintGraphic (
   EFI_UGA_DRAW_PROTOCOL               *UgaDraw;
   EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL     *Sto;
   EFI_HANDLE                          ConsoleHandle;
+  UINTN                               Width;
+  UINTN                               Height;
+  UINTN                               Delta;
 
   HorizontalResolution  = 0;
   VerticalResolution    = 0;
@@ -485,6 +488,15 @@ InternalPrintGraphic (
       //
       ASSERT (RowInfoArraySize <= 1);
 
+      if (RowInfoArraySize != 0) {
+        Width  = RowInfoArray[0].LineWidth;
+        Height = RowInfoArray[0].LineHeight;
+        Delta  = Blt->Width * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL);
+      } else {
+        Width  = 0;
+        Height = 0;
+        Delta  = 0;
+      }
       Status = UgaDraw->Blt (
                           UgaDraw,
                           (EFI_UGA_PIXEL *) Blt->Image.Bitmap,
@@ -493,9 +505,9 @@ InternalPrintGraphic (
                           PointY,
                           PointX,
                           PointY,
-                          RowInfoArray[0].LineWidth,
-                          RowInfoArray[0].LineHeight,
-                          Blt->Width * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL)
+                          Width,
+                          Height,
+                          Delta
                           );
     } else {
       goto Error;
@@ -507,7 +519,11 @@ InternalPrintGraphic (
   //
   // Calculate the number of actual printed characters
   //
-  PrintNum = RowInfoArray[0].EndIndex - RowInfoArray[0].StartIndex + 1;
+  if (RowInfoArraySize != 0) {
+    PrintNum = RowInfoArray[0].EndIndex - RowInfoArray[0].StartIndex + 1;
+  } else {
+    PrintNum = 0;
+  }
 
   FreePool (RowInfoArray);
   FreePool (Blt);
-- 
2.39.2