Re: [PATCH 0/1] MR3871: gdiplus: implement PixelOffsetMode Half and HighQuality for GdipDrawImagePointsRect

[Bartosz Kosiorek (＠gang65)]

Bartosz Kosiorek (@gang65) commented about dlls/gdiplus/tests/image.c:
>      { 0.8, PixelOffsetModeHalf, image_080 }, /* 14 */
>      { 1.0, PixelOffsetModeHalf, image_100 },
> -
>    { 1.2, PixelOffsetModeHalf, image_120_half, TRUE },
> -
>    { 1.2, PixelOffsetModeHalf, image_120_half },
>    { 1.5, PixelOffsetModeHalf, image_150_half, TRUE },
> -
>    { 1.8, PixelOffsetModeHalf, image_180_half, TRUE },
> -
>    { 2.0, PixelOffsetModeHalf, image_200_half, TRUE },
> -
>    { 1.8, PixelOffsetModeHalf, image_180_half },
> -
>    { 2.0, PixelOffsetModeHalf, image_200_half },
>    { 2.5, PixelOffsetModeHalf, image_250_half, TRUE },

The colours of the HALF image is perfectly fine. 
What still needs to improvement is destination area calculation.

Destination area for Half pixel offset should use `Rounding half down` instead of current `Rounding half up`.

I will do that in separate Merge Request, to easier understand it.