[Mesa-dev] EXT_image_dma_buf_import for intel

[Eric Anholt]

Topi Pohjolainen <topi.pohjolainen at intel.com> writes:

> The set introduces new target for 'eglCreateImageKHR()' allowing one
> to create EGL images out of externally allocated buffers. Especially
> one can combine up to three separate buffers into one single logical
> entity. Low level native buffers may not support planar formats and
> hence EGL layer will instead combine native buffers each representing
> a single plane into one planar image.
>
> Until now an image in intel dri backend consisted of a single region.
> Here this is extended to accomodate YUV formats having each component
> in its own plane, but intended only for images that are to be bound
> as textures later on.
>
> As such the images are not much of use, but combined with the logic
> (OES_external_image) allowing one to create textures out of these
> images, one can start directly sampling the underlying buffers.

This seems the non-planar parts (certainly formats like
DRM_FORMAT_ARGB8888) ought to be testable immediately using the existing
GL_OES_EGL_image support.
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