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eliminate unnecessary multiplications in the inner loops of DIB_1BPP_BitBltSrcCopy_From1BPP
svn path=/trunk/; revision=9507
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@ -16,7 +16,7 @@
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* $Id: dib1bpp.c,v 1.28 2004/05/14 22:56:17 gvg Exp $ */
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/* $Id: dib1bpp.c,v 1.29 2004/05/27 12:35:23 royce Exp $ */
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#include <w32k.h>
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VOID
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@ -77,6 +77,7 @@ DIB_1BPP_BitBltSrcCopy_From1BPP (
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// which direction are we going?
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int xinc;
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int yinc;
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int ySrcDelta, yDstDelta;
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// following 4 variables are used for the y-sweep
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int dy; // dest y
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@ -101,6 +102,8 @@ DIB_1BPP_BitBltSrcCopy_From1BPP (
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dy2 = DestRect->bottom - 1;
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sy1 = SourcePoint->y;
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yinc = 1;
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ySrcDelta = SourceSurf->lDelta;
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yDstDelta = DestSurf->lDelta;
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}
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else
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{
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@ -109,6 +112,8 @@ DIB_1BPP_BitBltSrcCopy_From1BPP (
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dy2 = DestRect->top;
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sy1 = SourcePoint->y + dy1 - dy2;
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yinc = -1;
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ySrcDelta = -SourceSurf->lDelta;
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yDstDelta = -DestSurf->lDelta;
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}
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if ( DestRect->left <= SourcePoint->x )
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{
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@ -161,8 +166,8 @@ DIB_1BPP_BitBltSrcCopy_From1BPP (
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if ( dy == dy2 )
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break;
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dy += yinc;
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pd += yinc * DestSurf->lDelta;
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ps += yinc * SourceSurf->lDelta;
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pd += yDstDelta;
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ps += ySrcDelta;
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}
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}
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else if ( !(0xFF00 & (srcmask<<shift) ) ) // check if ps[0] not needed...
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@ -176,8 +181,8 @@ DIB_1BPP_BitBltSrcCopy_From1BPP (
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if ( dy == dy2 )
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break;
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dy += yinc;
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pd += yinc * DestSurf->lDelta;
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ps += yinc * SourceSurf->lDelta;
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pd += yDstDelta;
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ps += ySrcDelta;
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}
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}
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else if ( !(0xFF & (srcmask<<shift) ) ) // check if ps[1] not needed...
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@ -191,8 +196,8 @@ DIB_1BPP_BitBltSrcCopy_From1BPP (
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if ( dy == dy2 )
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break;
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dy += yinc;
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pd += yinc * DestSurf->lDelta;
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ps += yinc * SourceSurf->lDelta;
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pd += yDstDelta;
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ps += ySrcDelta;
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}
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}
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else // both ps[0] and ps[1] are needed
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@ -206,8 +211,8 @@ DIB_1BPP_BitBltSrcCopy_From1BPP (
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if ( dy == dy2 )
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break;
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dy += yinc;
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pd += yinc * DestSurf->lDelta;
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ps += yinc * SourceSurf->lDelta;
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pd += yDstDelta;
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ps += ySrcDelta;
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}
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}
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