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- implement screenbuffer resizing(required for console scrolling support)

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- still quite buggy :)

svn path=/trunk/; revision=28779
This commit is contained in:
Johannes Anderwald 2007-09-02 18:21:36 +00:00
parent b2454a486f
commit 1f4fc15d27
1 changed files with 43 additions and 5 deletions
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48
reactos/subsystems/win32/csrss/win32csr/guiconsole.c
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@ -1627,13 +1627,51 @@ GuiApplyUserSettings(PCSRSS_CONSOLE Console, PGUI_CONSOLE_DATA GuiData, PConsole
if (windx != Console->ActiveBuffer->MaxX || windy != Console->ActiveBuffer->MaxY)
{
//
// TODO
// resize screen buffer
BYTE * Buffer = HeapAlloc(Win32CsrApiHeap, 0, windx * windy * 2);
if (Buffer)
{
DWORD Offset = 0;
DWORD BufferOffset = 0;
USHORT CurrentY;
BYTE * OldBuffer;
DWORD diff;
DWORD value = ((((DWORD)Console->ActiveBuffer->DefaultAttrib) << 16) | 0x20);
OldBuffer = Console->ActiveBuffer->Buffer;
// Console->ActiveBuffer->MaxX = windx;
// Console->ActiveBuffer->MaxY = windy;
for (CurrentY = 0; CurrentY < min(Console->ActiveBuffer->MaxY, windy); CurrentY++)
{
if (windx < Console->ActiveBuffer->MaxX)
{
/* reduce size */
RtlCopyMemory(&Buffer[Offset], &OldBuffer[BufferOffset], windx * 2);
Offset += (windx * 2);
BufferOffset += (Console->ActiveBuffer->MaxX * 2);
}
else
{
/* enlarge size */
diff = windx - Console->ActiveBuffer->MaxX;
RtlCopyMemory(&Buffer[Offset], &OldBuffer[BufferOffset], Console->ActiveBuffer->MaxX * 2);
Offset += (Console->ActiveBuffer->MaxX * 2);
/* zero new part of it */
memset(&Buffer[Offset], value, (diff * 2));
Offset += (diff * 2);
BufferOffset += (Console->ActiveBuffer->MaxX * 2);
}
}
if (windy > Console->ActiveBuffer->MaxY)
{
diff = windy - Console->ActiveBuffer->MaxX;
memset(&Buffer[Offset], value, diff * 2 * windx);
}
(void)InterlockedExchangePointer((PVOID volatile *)Console->ActiveBuffer->Buffer, Buffer);
HeapFree(Win32CsrApiHeap, 0, OldBuffer);
Console->ActiveBuffer->MaxX = windx;
Console->ActiveBuffer->MaxY = windy;
}
}
windx = LOWORD(pConInfo->WindowSize);