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gdi32: Try to compact the region. 

Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Huw Davies 2016-07-04 09:05:45 +01:00 committed by Alexandre Julliard
parent 27375d8476
commit 6526ac1999
1 changed files with 25 additions and 18 deletions
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43
dlls/gdi32/region.c
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@ -1598,6 +1598,28 @@ static INT REGION_Coalesce (
return (curStart);
}
/**********************************************************************
* REGION_compact
*
* To keep regions from growing without bound, shrink the array of rectangles
* to match the new number of rectangles in the region.
*
* Only do this if the number of rectangles allocated is more than
* twice the number of rectangles in the region.
*/
static void REGION_compact( WINEREGION *reg )
{
if ((reg->numRects < reg->size / 2) && (reg->numRects > 2))
{
RECT *new_rects = HeapReAlloc( GetProcessHeap(), 0, reg->rects, reg->numRects * sizeof(RECT) );
if (new_rects)
{
reg->rects = new_rects;
reg->size = reg->numRects;
}
}
}
/***********************************************************************
* REGION_RegionOp
*
@ -1839,23 +1861,7 @@ static BOOL REGION_RegionOp(
REGION_Coalesce (&newReg, prevBand, curBand);
}
/*
* A bit of cleanup. To keep regions from growing without bound,
* we shrink the array of rectangles to match the new number of
* rectangles in the region. This never goes to 0, however...
*
* Only do this stuff if the number of rectangles allocated is more than
* twice the number of rectangles in the region (a simple optimization...).
*/
if ((newReg.numRects < (newReg.size >> 1)) && (newReg.numRects > 2))
{
RECT *new_rects = HeapReAlloc( GetProcessHeap(), 0, newReg.rects, newReg.numRects * sizeof(RECT) );
if (new_rects)
{
newReg.rects = new_rects;
newReg.size = newReg.numRects;
}
}
REGION_compact( &newReg );
HeapFree( GetProcessHeap(), 0, destReg->rects );
destReg->rects = newReg.rects;
destReg->size = newReg.size;
@ -2633,8 +2639,9 @@ static BOOL REGION_PtsToRegion( struct point_block *FirstPtBlock, WINEREGION *re
extents->right = 0;
extents->bottom = 0;
}
REGION_compact( reg );
return(TRUE);
return TRUE;
}
/***********************************************************************