[FFmpeg-devel] [PATCH] libavfilter/vf_overlay.c Correct small error in intersection detection.

[Stefano Sabatini]

On date Saturday 2013-10-26 15:22:44 +0200, Benedict Endemann encoded:
> The image size of the destination image was used to
>  determine if an source image was positioned in a way 
> 'left' or 'above' the destination image, that no
>  intersection could occur.
>  Actually for this two cases the size of the source image
>  has to be used!
> 
> ---
>  libavfilter/vf_overlay.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/libavfilter/vf_overlay.c b/libavfilter/vf_overlay.c
> index b5ade85..89e11e8 100644
> --- a/libavfilter/vf_overlay.c
> +++ b/libavfilter/vf_overlay.c
> @@ -346,8 +346,8 @@ static void blend_image(AVFilterContext *ctx,
>      const int dst_w = dst->width;
>      const int dst_h = dst->height;
>  
> -    if (x >= dst_w || x+dst_w  < 0 ||
> -        y >= dst_h || y+dst_h < 0)
> +    if (x >= dst_w || x+src_w < 0 ||
> +        y >= dst_h || y+src_h < 0)
>          return; /* no intersection */

Applied, thanks!
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