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Optimized DstInvert32

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svn path=/trunk/; revision=15769
This commit is contained in:
Alex Ionescu 2005-06-04 13:20:34 +00:00
parent e13bb66f6e
commit e24313d28a
1 changed files with 28 additions and 19 deletions
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47
reactos/subsys/win32k/dib/dib32bpp.c
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@ -398,32 +398,41 @@ DIB_32BPP_BitBlt(PBLTINFO BltInfo)
}
/* optimze functions for bitblt */
BOOLEAN
VOID
FASTCALL
DIB_32DstInvert(PBLTINFO BltInfo)
{
// return(~Dest);
ULONG DestX, DestY;
ULONG Dest;
PULONG DestBits;
ULONG top = BltInfo->DestRect.top;
ULONG bottom = BltInfo->DestRect.left;
ULONG DestX = BltInfo->DestRect.right - left;
ULONG DestY = BltInfo->DestRect.bottom - top;
ULONG delta = BltInfo->DestSurface->lDelta - (DestX << 2);
ULONG bottom = BltInfo->DestRect.bottom;
ULONG right = BltInfo->DestRect.right;
ULONG delta = BltInfo->DestSurface->lDelta - ((BltInfo->DestRect.right - BltInfo->DestRect.left) <<2) ;
/* Calculate the Initial Destination */
DestBits = (PULONG)(BltInfo->DestSurface->pvScan0 + (left << 2) +
top * BltInfo->DestSurface->lDelta);
DestBits = (PULONG)(BltInfo->DestSurface->pvScan0 + (BltInfo->DestRect.left << 2) +
BltInfo->DestRect.top * BltInfo->DestSurface->lDelta);
for (DestY = BltInfo->DestRect.top; DestY < bottom; DestY++)
{
for (DestX = BltInfo->DestRect.left; DestX < right; DestX++, DestBits++)
{
Dest = *DestBits;
*DestBits = ~Dest;
}
do while (DestY > 0)
{
do while (DestX > 0)
{
/* Invert bits */
*DestBits =~ *DestBits;
/* Update Position */
DestBits++;
/* Decrease distance to do */
DestX--;
}
DestBits = (PULONG)((ULONG_PTR)DestBits + delta);
/* Update position */
DestBits = (PULONG)((ULONG_PTR)DestBits + delta);
/* Decrease distance to do */
DestY--;
}
return TRUE;
}
BOOLEAN