[PATCH 2/4] quartz: Images in Direct3D surfaces must be top-down

[Andrew Eikum]

Signed-off-by: Andrew Eikum <aeikum at codeweavers.com>

On Wed, Jul 20, 2016 at 02:37:10PM +1000, Jan Schmidt wrote:
> Invert images when copying to a Direct3D surface if
> they are provided bottom-up.
> 
> Signed-off-by: Jan Schmidt <jan at centricular.com>
> ---
>  dlls/quartz/vmr9.c | 12 +++++++++++-
>  1 file changed, 11 insertions(+), 1 deletion(-)
> 
> diff --git a/dlls/quartz/vmr9.c b/dlls/quartz/vmr9.c
> index f2c3d93..d590a71 100644
> --- a/dlls/quartz/vmr9.c
> +++ b/dlls/quartz/vmr9.c
> @@ -255,7 +255,17 @@ static DWORD VMR9_SendSampleData(struct quartz_vmr *This, VMR9PresentationInfo *
>          return hr;
>      }
>  
> -    if (lock.Pitch != width * bmiHeader->biBitCount / 8)
> +    if (height > 0) {
> +        /* Bottom up image needs inverting */
> +        lock.pBits = (char *)lock.pBits + (height * lock.Pitch);
> +        while (height--)
> +        {
> +            memcpy(lock.pBits, data, width * bmiHeader->biBitCount / 8);
> +            data = data + width * bmiHeader->biBitCount / 8;
> +            lock.pBits = (char *)lock.pBits - lock.Pitch;
> +        }
> +    }
> +    else if (lock.Pitch != width * bmiHeader->biBitCount / 8)
>      {
>          WARN("Slow path! %u/%u\n", lock.Pitch, width * bmiHeader->biBitCount/8);
>  
> -- 
> 2.7.4
> 
> 
>