[Mesa-dev] [PATCH] [RFC] egl: propose simple EGL_MESA_image_dma_buf_export v2.2

[Daniel Stone]

Hi,

On 3 March 2015 at 18:40, Chad Versace <chad.versace at intel.com> wrote:
> On 03/03/2015 12:13 AM, Daniel Stone wrote:
>> On Tuesday, March 3, 2015, Dave Airlie <airlied at gmail.com <mailto:airlied at gmail.com>> wrote:
>>     +    EGLBoolean eglExportDMABUFImageQueryMESA(EGLDisplay dpy,
>>     +                                  EGLImageKHR image,
>>     +                                 int *fourcc,
>>     +                                 int *num_planes);
>>
>>
>> Shouldn't this contain the modifier(s) as well?
>
> What is the motivation for defining two export calls, and exporting
> a subset of information from each call? I don't understand why the
> fourcc values are exported by one call, but the strides exported a
> separate call.

Querying the image gives you what you need in order to know if you can
actually deal with the image, before you go to all the effort of
exporting it.

Cheers,
Daniel