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gdiplus: Fix a possible floating point exception in path gradients. 

Signed-off-by: Vincent Povirk <vincent@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Vincent Povirk 2017-07-25 14:55:36 -05:00 committed by Alexandre Julliard
parent 4a70f67ffc
commit 331a7af37a
1 changed files with 11 additions and 2 deletions
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13
dlls/gdiplus/graphics.c
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@ -1493,8 +1493,17 @@ static GpStatus brush_fill_pixels(GpGraphics *graphics, GpBrush *brush,
REAL blend_amount, pdy, pdx;
pdy = yf - center_point.Y;
pdx = xf - center_point.X;
blend_amount = ( (center_point.Y - start_point.Y) * pdx + (start_point.X - center_point.X) * pdy ) / ( dy * pdx - dx * pdy );
outer_color = blend_colors(start_color, end_color, blend_amount);
if (fabs(pdx) <= 0.001 && fabs(pdy) <= 0.001)
{
/* Too close to center point, don't try to calculate outer color */
outer_color = start_color;
}
else
{
blend_amount = ( (center_point.Y - start_point.Y) * pdx + (start_point.X - center_point.X) * pdy ) / ( dy * pdx - dx * pdy );
outer_color = blend_colors(start_color, end_color, blend_amount);
}
}
distance = (end_point.Y - start_point.Y) * (start_point.X - xf) +