Author: aandrejevic
Date: Fri Oct 4 21:16:58 2013
New Revision: 60526
URL: http://svn.reactos.org/svn/reactos?rev=60526&view=rev
Log:
[NTVDM]
Properly handle the case when the console framebuffer could not be created.
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] Fri Oct 4 21:16:58 2013
@@ -488,12 +488,22 @@
if (!(VgaGcRegisters[VGA_GC_MISC_REG] & VGA_GC_MISC_NOALPHA))
{
/* Enter new text mode */
- if (!VgaEnterTextMode(&Resolution)) return;
+ if (!VgaEnterTextMode(&Resolution))
+ {
+ DisplayMessage(L"An unexpected VGA error occurred while switching into text mode.");
+ VdmRunning = FALSE;
+ return;
+ }
}
else
{
/* Enter 8-bit graphics mode */
- if (!VgaEnterGraphicsMode(&Resolution)) return;
+ if (!VgaEnterGraphicsMode(&Resolution))
+ {
+ DisplayMessage(L"An unexpected VGA error occurred while switching into graphics mode.");
+ VdmRunning = FALSE;
+ return;
+ }
}
/* Trigger a full update of the screen */
@@ -515,6 +525,12 @@
DWORD Address = (VgaCrtcRegisters[VGA_CRTC_START_ADDR_HIGH_REG] << 8)
+ VgaCrtcRegisters[VGA_CRTC_START_ADDR_LOW_REG];
DWORD ScanlineSize = (DWORD)VgaCrtcRegisters[VGA_CRTC_OFFSET_REG] * 2;
+
+ /*
+ * If console framebuffer is NULL, that means something went wrong
+ * earlier and this is the final display refresh.
+ */
+ if (ConsoleFramebuffer == NULL) return;
/* Check if this is text mode or graphics mode */
if (VgaGcRegisters[VGA_GC_MISC_REG] & VGA_GC_MISC_NOALPHA)