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[BOOTVID] Improve text scrolling performance for PC-98 (#2936)

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Dmitry Borisov 2020-07-27 23:57:45 +06:00 committed by Stanislav Motylkov
parent 5d40981efa
commit c87be643f8
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GPG key ID: AFE513258CBA9E92
1 changed files with 7 additions and 7 deletions
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14
drivers/base/bootvid/i386/pc98/bootvid.c
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@ -283,24 +283,24 @@ PreserveRow(
_In_ ULONG TopDelta, _In_ ULONG TopDelta,
_In_ BOOLEAN Restore) _In_ BOOLEAN Restore)
{ {
PUCHAR OldPosition, NewPosition; PULONG OldPosition, NewPosition;
ULONG PixelCount = TopDelta * SCREEN_WIDTH; ULONG PixelCount = TopDelta * (SCREEN_WIDTH / sizeof(ULONG));
if (Restore) if (Restore)
{ {
/* Restore the row by copying back the contents saved off-screen */ /* Restore the row by copying back the contents saved off-screen */
OldPosition = (PUCHAR)(FrameBuffer + FB_OFFSET(0, SCREEN_HEIGHT)); OldPosition = (PULONG)(FrameBuffer + FB_OFFSET(0, SCREEN_HEIGHT));
NewPosition = (PUCHAR)(FrameBuffer + FB_OFFSET(0, CurrentTop)); NewPosition = (PULONG)(FrameBuffer + FB_OFFSET(0, CurrentTop));
} }
else else
{ {
/* Preserve the row by saving its contents off-screen */ /* Preserve the row by saving its contents off-screen */
OldPosition = (PUCHAR)(FrameBuffer + FB_OFFSET(0, CurrentTop)); OldPosition = (PULONG)(FrameBuffer + FB_OFFSET(0, CurrentTop));
NewPosition = (PUCHAR)(FrameBuffer + FB_OFFSET(0, SCREEN_HEIGHT)); NewPosition = (PULONG)(FrameBuffer + FB_OFFSET(0, SCREEN_HEIGHT));
} }
while (PixelCount--) while (PixelCount--)
WRITE_REGISTER_UCHAR(NewPosition++, READ_REGISTER_UCHAR(OldPosition++)); WRITE_REGISTER_ULONG(NewPosition++, READ_REGISTER_ULONG(OldPosition++));
} }
VOID VOID