[reactos] 02/03: [FREELDR] Reimplement i386PrintText(), adding line wrap handling. CORE-16268

[Serge Gautherie]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=ad43210b41fba808b5e0c…

commit ad43210b41fba808b5e0c5b703eeaeec6ab6c6d5
Author:     Serge Gautherie <reactos-git_serge_171003(a)gautherie.fr>
AuthorDate: Wed Jul 31 15:48:46 2019 +0200
Commit:     Hermès Bélusca-Maïto <hermes.belusca-maito(a)reactos.org>
CommitDate: Wed Jan 1 21:14:08 2020 +0100

    [FREELDR] Reimplement i386PrintText(), adding line wrap handling. CORE-16268
    
    Co-Authored-By: Stanislav Motylkov <x86corez(a)gmail.com>
---
 boot/freeldr/freeldr/arch/i386/i386bug.c | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/boot/freeldr/freeldr/arch/i386/i386bug.c
b/boot/freeldr/freeldr/arch/i386/i386bug.c
index b0052d7e4b1..233b33332ef 100644
--- a/boot/freeldr/freeldr/arch/i386/i386bug.c
+++ b/boot/freeldr/freeldr/arch/i386/i386bug.c
@@ -49,21 +49,26 @@ i386PrintChar(CHAR chr, ULONG x, ULONG y)
 static void
 i386PrintText(CHAR *pszText)
 {
-    char chr;
-    while (1)
-    {
-        chr = *pszText++;
+    ULONG Width, Unused;
+
+    MachVideoGetDisplaySize(&Width, &Unused, &Unused);
 
-        if (chr == 0) break;
-        if (chr == '\n')
+    for (; *pszText != ANSI_NULL; ++pszText)
+    {
+        if (*pszText == '\n')
         {
-            i386_ScreenPosY++;
             i386_ScreenPosX = 0;
+            ++i386_ScreenPosY;
             continue;
         }
 
-        MachVideoPutChar(chr, SCREEN_ATTR, i386_ScreenPosX, i386_ScreenPosY);
-        i386_ScreenPosX++;
+        MachVideoPutChar(*pszText, SCREEN_ATTR, i386_ScreenPosX, i386_ScreenPosY);
+        if (++i386_ScreenPosX >= Width)
+        {
+            i386_ScreenPosX = 0;
+            ++i386_ScreenPosY;
+        }
+    // FIXME: Implement vertical screen scrolling if we are at the end of the screen.
     }
 }