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[NTVDM]

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Implement vertical scrolling in BiosScrollWindow.


svn path=/branches/ntvdm/; revision=60955
This commit is contained in:
Aleksandar Andrejevic 2013-11-11 20:41:55 +00:00
parent c7a7dbe7e2
commit b781febbfe
1 changed files with 46 additions and 4 deletions
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50
subsystems/ntvdm/bios.c
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@ -651,8 +651,9 @@ BOOLEAN BiosScrollWindow(INT Direction,
{
DWORD i;
LPWORD WindowData;
DWORD WindowSize = (Rectangle.Bottom - Rectangle.Top + 1)
* (Rectangle.Right - Rectangle.Left + 1);
WORD WindowWidth = Rectangle.Right - Rectangle.Left + 1;
WORD WindowHeight = Rectangle.Bottom - Rectangle.Top + 1;
DWORD WindowSize = WindowWidth * WindowHeight;
/* Allocate a buffer for the window */
WindowData = (LPWORD)HeapAlloc(GetProcessHeap(),
@ -663,7 +664,13 @@ BOOLEAN BiosScrollWindow(INT Direction,
/* Read the window data */
BiosReadWindow(WindowData, Rectangle, Page);
if (Amount == 0)
if ((Amount == 0)
|| (((Direction == SCROLL_DIRECTION_UP)
|| (Direction == SCROLL_DIRECTION_DOWN))
&& (Amount >= WindowHeight))
|| (((Direction == SCROLL_DIRECTION_LEFT)
|| (Direction == SCROLL_DIRECTION_RIGHT))
&& (Amount >= WindowWidth)))
{
/* Fill the window */
for (i = 0; i < WindowSize; i++)
@ -674,7 +681,42 @@ BOOLEAN BiosScrollWindow(INT Direction,
goto Done;
}
// TODO: Scroll the window!
switch (Direction)
{
case SCROLL_DIRECTION_UP:
{
RtlMoveMemory(WindowData,
&WindowData[WindowWidth * Amount],
(WindowSize - WindowWidth * Amount) * sizeof(WORD));
for (i = 0; i < Amount * WindowWidth; i++)
{
WindowData[WindowSize - i - 1] = MAKEWORD(' ', FillAttribute);
}
break;
}
case SCROLL_DIRECTION_DOWN:
{
RtlMoveMemory(&WindowData[WindowWidth * Amount],
WindowData,
(WindowSize - WindowWidth * Amount) * sizeof(WORD));
for (i = 0; i < Amount * WindowWidth; i++)
{
WindowData[i] = MAKEWORD(' ', FillAttribute);
}
break;
}
default:
{
// TODO: NOT IMPLEMENTED!
UNIMPLEMENTED;
}
}
Done:
/* Write back the window data */