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gdi32: Don't update the bounds if any poly{line|gon} has fewer than two points.

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Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Huw Davies 2016-03-09 11:17:04 +00:00 committed by Alexandre Julliard
parent 2e4a37f2cf
commit 6e05189ba4
1 changed files with 23 additions and 10 deletions
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23
dlls/gdi32/enhmfdrv/graphics.c
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@ -484,28 +484,33 @@ EMFDRV_PolyPolylinegon( PHYSDEV dev, const POINT* pt, const INT* counts, UINT po
EMRPOLYPOLYLINE *emr;
DWORD cptl = 0, poly, size, i;
INT point;
RECTL bounds;
const RECTL empty = {0, 0, -1, -1};
RECTL bounds = empty;
const POINT *pts;
BOOL ret, use_small_emr = TRUE;
bounds.left = bounds.right = pt[0].x;
bounds.top = bounds.bottom = pt[0].y;
BOOL ret, use_small_emr = TRUE, bounds_valid = TRUE;
pts = pt;
for(poly = 0; poly < polys; poly++) {
cptl += counts[poly];
if(counts[poly] < 2) bounds_valid = FALSE;
for(point = 0; point < counts[poly]; point++) {
/* check whether all points fit in the SHORT int POINT structure */
if( ((pts->x+0x8000) & ~0xffff ) ||
((pts->y+0x8000) & ~0xffff ) )
use_small_emr = FALSE;
if(pts == pt) {
bounds.left = bounds.right = pts->x;
bounds.top = bounds.bottom = pts->y;
} else {
if(bounds.left > pts->x) bounds.left = pts->x;
else if(bounds.right < pts->x) bounds.right = pts->x;
if(bounds.top > pts->y) bounds.top = pts->y;
else if(bounds.bottom < pts->y) bounds.bottom = pts->y;
}
pts++;
}
}
if(!cptl) bounds_valid = FALSE;
size = FIELD_OFFSET(EMRPOLYPOLYLINE, aPolyCounts[polys]);
if(use_small_emr)
@ -519,7 +524,10 @@ EMFDRV_PolyPolylinegon( PHYSDEV dev, const POINT* pt, const INT* counts, UINT po
if(use_small_emr) emr->emr.iType += EMR_POLYPOLYLINE16 - EMR_POLYPOLYLINE;
emr->emr.nSize = size;
if(bounds_valid)
emr->rclBounds = bounds;
else
emr->rclBounds = empty;
emr->nPolys = polys;
emr->cptl = cptl;
@ -543,6 +551,11 @@ EMFDRV_PolyPolylinegon( PHYSDEV dev, const POINT* pt, const INT* counts, UINT po
}
ret = EMFDRV_WriteRecord( dev, &emr->emr );
if(ret && !bounds_valid)
{
ret = FALSE;
SetLastError( ERROR_INVALID_PARAMETER );
}
if(ret)
EMFDRV_UpdateBBox( dev, &emr->rclBounds );
HeapFree( GetProcessHeap(), 0, emr );