--- trunk/reactos/subsys/win32k/dib/dib32bpp.c 2005-06-04 10:05:20 UTC (rev 15768)
+++ trunk/reactos/subsys/win32k/dib/dib32bpp.c 2005-06-04 13:20:34 UTC (rev 15769)
@@ -398,32 +398,41 @@
}
/* 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