Re: [PATCH v2 0/1] MR3971: gdiplus: Optimize GdipDrawImagePointsRect and GDI32_GdipDrawPath

[Bartosz Kosiorek (＠gang65)]

Bartosz Kosiorek (@gang65) commented about dlls/gdiplus/graphics.c:
>      pt[0].X = 0.0;
>      pt[0].Y = 0.0;
>      pt[1].X = 1.0;
>      pt[1].Y = 1.0;

We could optimize even more, by calculating only one sqrt, with:
```
        scale_x = graphics->worldtrans.matrix[0] + graphics->worldtrans.matrix[2];
        scale_y = graphics->worldtrans.matrix[1] + graphics->worldtrans.matrix[3];

width *= units_to_pixels(pen->width, pen->unit == UnitWorld ? graphics->unit : pen->unit,
                                 graphics->xres, graphics->printer_display);
        width *= graphics->scale;

pt[0].X = 0.0;
        pt[0].Y = 0.0;
        pt[1].X = scale_x;
        pt[1].Y = scale_y;

gdip_transform_points(graphics, WineCoordinateSpaceGdiDevice, CoordinateSpaceDevice, pt, 2);
        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);
```