Re: [PATCH v5 0/2] MR3877: gdiplus: implement PixelOffsetMode Half and HighQuality for GdipDrawImagePointsRect

[Jeffrey Smith (＠whydoubt)]

Jeffrey Smith (@whydoubt) commented about dlls/gdiplus/tests/image.c:
> +                                            0x40,0x40,0x40, 0x40,0x40,0x40, 0x40,0x40,0x40, 0x40,0x40,0x40 };
> +    static const BYTE image_bil_150[24] = { 0x40,0x40,0x40, 0x40,0x40,0x40, 0x99,0x99,0x99, 0xcc,0xcc,0xcc,
> +                                            0x6f,0x6f,0x6f, 0x40,0x40,0x40, 0x40,0x40,0x40, 0x40,0x40,0x40 };
> +    static const BYTE image_bil_180[24] = { 0x40,0x40,0x40, 0x40,0x40,0x40, 0x88,0x88,0x88, 0xb2,0xb2,0xb2,
> +                                            0xad,0xad,0xad, 0x5f,0x5f,0x5f, 0x40,0x40,0x40, 0x40,0x40,0x40 };
> +    static const BYTE image_bil_200[24] = { 0x40,0x40,0x40, 0x40,0x40,0x40, 0x80,0x80,0x80, 0xa6,0xa6,0xa6,
> +                                            0xcc,0xcc,0xcc, 0x86,0x86,0x86, 0x40,0x40,0x40, 0x40,0x40,0x40 };
> +    static const BYTE image_bil_250[24] = { 0x40,0x40,0x40, 0x40,0x40,0x40, 0x40,0x40,0x40, 0x8f,0x8f,0x8f,
> +                                            0xad,0xad,0xad, 0xcc,0xcc,0xcc, 0x95,0x95,0x95, 0x5c,0x5c,0x5c };
>      static const struct test_data
>      {
>          REAL scale_x;
> +        InterpolationMode interpolation_mode;
>          PixelOffsetMode pixel_offset_mode;
>          const BYTE *image;
> +        INT precision;
> Is this precision necessary because different versions of gdiplus give different results, in anticipation of some future work, or giving the current implementation some slack?

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https://gitlab.winehq.org/wine/wine/-/merge_requests/3877#note_45752