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gdiplus: Account for negative height/width in GdipDrawImagePointsRect.

This commit is contained in:
Vincent Povirk 2014-03-13 16:16:03 -05:00 committed by Alexandre Julliard
parent cbd7651552
commit 06555a96ad
1 changed files with 24 additions and 0 deletions
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24
dlls/gdiplus/graphics.c
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@ -2781,6 +2781,30 @@ GpStatus WINGDIPAPI GdipDrawImagePointsRect(GpGraphics *graphics, GpImage *image
debugstr_pointf(&points[2])); debugstr_pointf(&points[2]));
memcpy(ptf, points, 3 * sizeof(GpPointF)); memcpy(ptf, points, 3 * sizeof(GpPointF));
/* Ensure source width/height is positive */
if (srcwidth < 0)
{
GpPointF tmp = ptf[1];
srcx = srcx + srcwidth;
srcwidth = -srcwidth;
ptf[2].X = ptf[2].X + ptf[1].X - ptf[0].X;
ptf[2].Y = ptf[2].Y + ptf[1].Y - ptf[0].Y;
ptf[1] = ptf[0];
ptf[0] = tmp;
}
if (srcheight < 0)
{
GpPointF tmp = ptf[2];
srcy = srcy + srcheight;
srcheight = -srcheight;
ptf[1].X = ptf[1].X + ptf[2].X - ptf[0].X;
ptf[1].Y = ptf[1].Y + ptf[2].Y - ptf[0].Y;
ptf[2] = ptf[0];
ptf[0] = tmp;
}
ptf[3].X = ptf[2].X + ptf[1].X - ptf[0].X; ptf[3].X = ptf[2].X + ptf[1].X - ptf[0].X;
ptf[3].Y = ptf[2].Y + ptf[1].Y - ptf[0].Y; ptf[3].Y = ptf[2].Y + ptf[1].Y - ptf[0].Y;
if (!srcwidth || !srcheight || ptf[3].X == ptf[0].X || ptf[3].Y == ptf[0].Y) if (!srcwidth || !srcheight || ptf[3].X == ptf[0].X || ptf[3].Y == ptf[0].Y)