Re: [PATCH 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:
>  CGImageAlphaInfo alpha_info = (window_surface->alpha_mask ? kCGImageAlphaPremultipliedFirst : kCGImageAlphaNoneSkipFirst);
>  CGColorSpaceRef colorspace;
>  CGImageRef image;
> - IOSurfaceRef io_surface = surface->back_buffer;
> - colorspace = CGColorSpaceCreateWithName(kCGColorSpaceSRGB);
> - image = CGImageCreate(color_info->bmiHeader.biWidth, abs(color_info->bmiHeader.biHeight), 8, 32,
> -
>                      color_info->bmiHeader.biSizeImage / abs(color_info->bmiHeader.biHeight), colorspace,
> -
>                      alpha_info | kCGBitmapByteOrder32Little, surface->provider, NULL, retina_on, kCGRenderingIntentDefault);
> - CGColorSpaceRelease(colorspace);
> - surface->back_buffer = surface->front_buffer;
> - surface->front_buffer = io_surface;
> - macdrv_window_set_color_image(surface->window, image, cgrect_from_rect(*rect), cgrect_from_rect(*dirty));
> - CGImageRelease(image);
> - {

Some comments describing what each of these operations does would be useful.