Re: [PATCH 0/1] MR3971: gdiplus: Optimize GdipDrawImagePointsRect and GDI32_GdipDrawPath

[Jeffrey Smith (＠whydoubt)]

Jeffrey Smith (@whydoubt) commented about dlls/gdiplus/graphics.c:
>  else{
>      /* Get an estimate for the amount the pen width is affected by the world
>       * transform. (This is similar to what some of the wine drivers do.) */
> -
>    pt[0].X = 0.0;
> -
>    pt[0].Y = 0.0;
> -
>    pt[1].X = 1.0;
> -
>    pt[1].Y = 1.0;
> -
>    GdipTransformMatrixPoints(&graphics->worldtrans, pt, 2);
> -
>    pt[0].X = graphics->worldtrans.matrix[4];
> -
>    pt[0].Y = graphics->worldtrans.matrix[5];
> -
>    pt[1].X = graphics->worldtrans.matrix[4] + graphics->worldtrans.matrix[0] + graphics->worldtrans.matrix[2];
> -
>    pt[1].Y = graphics->worldtrans.matrix[5] + graphics->worldtrans.matrix[1] + graphics->worldtrans.matrix[3];
> -
>    width = sqrt((pt[1].X - pt[0].X) * (pt[1].X - pt[0].X) +
>                 (pt[1].Y - pt[0].Y) * (pt[1].Y - pt[0].Y)) / sqrt(2.0);

If going for optimization, might as well go the rest of the way cleaning this up.
```suggestion:-6+0
        pt[1].X = graphics->worldtrans.matrix[0] + graphics->worldtrans.matrix[2];
        pt[1].Y = graphics->worldtrans.matrix[1] + graphics->worldtrans.matrix[3];

width = sqrt(pt[1].X * pt[1].X + pt[1].Y * pt[1].Y) / sqrt(2.0);
```
Note: the compiler converts `sqrt(2.0)` to the actual value, so no need move stuff around
to avoid a `sqrt` here.