Re: [PATCH v2 0/2] MR7938: Draft: winemac: Use IOSurface to update native window layers instead of CGImage.

[Brendan Shanks (＠bshanks)]

Brendan Shanks (@bshanks) commented about dlls/winemac.drv/surface.c:
> +    if (shape_changed || surface->shape_changed)
>      {
> +        surface->shape_changed = FALSE;
> +
> +        /* No shape, fully opaque */
>          if (!shape_bits)
> -            macdrv_window_set_shape_image(surface->window, NULL);
> +        {
> +            Pixel_8888 alpha1 = { 0, 0, 0, 255 };
> +            vImage_Buffer dst = {
> +                .data = IOSurfaceGetBaseAddress(io_surface),
> +                .height = IOSurfaceGetHeight(io_surface),
> +                .width = IOSurfaceGetWidth(io_surface),
> +                .rowBytes = IOSurfaceGetBytesPerRow(io_surface),
> +            };
> +            vImageOverwriteChannelsWithPixel_ARGB8888(alpha1, &dst, &dst, 0x1, kvImageNoFlags);
> Need to unlock/lock `io_surface` around this call

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https://gitlab.winehq.org/wine/wine/-/merge_requests/7938#note_122157