[aandrejevic] 59671: [NTVDM] Clear the VGA memory during initialization. Clear the graphics framebuffer when switching to graphics mode.

Author: aandrejevic
Date: Wed Aug  7 21:15:02 2013
New Revision: 59671
URL: http://svn.reactos.org/svn/reactos?rev=59671&view=rev
Log:
[NTVDM]
Clear the VGA memory during initialization.
Clear the graphics framebuffer when switching to graphics mode.
Modified:
    branches/ntvdm/subsystems/ntvdm/vga.c
Modified: branches/ntvdm/subsystems/ntvdm/vga.c
URL:
http://svn.reactos.org/svn/reactos/branches/ntvdm/subsystems/ntvdm/vga.c?re…
==============================================================================
--- branches/ntvdm/subsystems/ntvdm/vga.c       [iso-8859-1] (original)
+++ branches/ntvdm/subsystems/ntvdm/vga.c       [iso-8859-1] Wed Aug  7 21:15:02 2013
@@ -254,6 +254,9 @@
     ConsoleFramebuffer = GraphicsBufferInfo.lpBitMap;
     ConsoleMutex = GraphicsBufferInfo.hMutex;
+    /* Clear the framebuffer */
+    ZeroMemory(ConsoleFramebuffer, BitmapInfo->bmiHeader.biSizeImage);
+
     /* Set the active buffer */
     SetConsoleActiveScreenBuffer(GraphicsConsoleBuffer);
@@ -946,6 +949,9 @@
     /* Set the global handle */
     TextConsoleBuffer = TextHandle;
+    /* Clear the VGA memory */
+    ZeroMemory(VgaMemory, VGA_NUM_BANKS * VGA_BANK_SIZE);
+
     /* Set the default video mode */
     BiosSetVideoMode(BIOS_DEFAULT_VIDEO_MODE);
     VgaUpdateMode();