[RFC dri3proto 01/16] Add modifier/multi-plane requests, bump to v1.1

[Adam Jackson]

On Thu, 2017-06-08 at 19:43 +0100, Daniel Stone wrote:
> DRI3 version 1.1 adds support for explicit format modifiers, including
> multi-planar buffers.
> 
> Signed-off-by: Daniel Stone <daniels at collabora.com>
> ---
>  dri3proto.h | 142 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 140 insertions(+), 2 deletions(-)

Should update dri3proto.txt too.

> +typedef struct {
> +    CARD8   reqType;
> +    CARD8   dri3ReqType;
> +    CARD16  length B16;
> +    CARD32  pixmap B32;
> +    CARD32  drawable B32;
> +    CARD8   num_buffers; /* Number of file descriptors passed */
> +    CARD8   pad13;
> +    CARD16  pad14 B16;
> +    CARD16  width B16;
> +    CARD16  height B16;
> +    CARD32  stride0 B32;
> +    CARD32  offset0 B32;
> +    CARD32  stride1 B32;
> +    CARD32  offset1 B32;
> +    CARD32  stride2 B32;
> +    CARD32  offset2 B32;
> +    CARD32  stride3 B32;
> +    CARD32  offset3 B32;
> +    CARD32  format B32;
> +    CARD32  modifier_hi B32;
> +    CARD32  modifier_lo B32;
> +} xDRI3PixmapFromBuffersReq;
> +#define sz_xDRI3PixmapFromBuffersReq 64

Why exactly four strides/offsets?

- ajax