[Mesa-dev] [PATCH v2 21/27] i965: Support images with aux buffers

[Chad Versace]

On Thu 29 Jun 2017, Jason Ekstrand wrote:
> From: Ben Widawsky <ben at bwidawsk.net>
> 
> Previously images did not support any auxiliary compression surfaces
> (CCS, MCS, or HiZ).  That's about to change.  This patch just adds the
> fields to __DRIimageRec to make auxiliary surfaces possible.
> 
> v2 (Jason Ekstrand):
>  - Add an aux_pitch parameter as well as aux_offset
> 
> Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
> Acked-by: Daniel Stone <daniels at collabora.com>
> Reviewed-by: Topi Pohjolainen <topi.pohjolainen at intel.com>
> ---
>  src/mesa/drivers/dri/i965/intel_image.h | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/src/mesa/drivers/dri/i965/intel_image.h b/src/mesa/drivers/dri/i965/intel_image.h
> index cf06105..5ac5c31 100644
> --- a/src/mesa/drivers/dri/i965/intel_image.h
> +++ b/src/mesa/drivers/dri/i965/intel_image.h
> @@ -92,6 +92,12 @@ struct __DRIimageRec {
>     /** The image was created with EGL_EXT_image_dma_buf_import. */
>     bool dma_buf_imported;
>  
> +   /** Offset of the auxiliary compression surface in the bo. */
> +   uint32_t aux_offset;

Just to clarify... is aux_offset relative to the bo's base address, or
relative to __DRIimageRec::offset?