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Overlay of more than 3 images in AM3517

Murali Manohar
Prodigy 50 points
Other Parts Discussed in Thread: AM3517

Hi,

Is there way to do more that 3 images overlay using display subsystem pipelines. If not, is there any other mechanism to perform using platform capabilities (other than doing in software)?

Can 2D accelarator or VPFE used for this purpose?

Rgds,

Murali

  • 0
    TI__Mastermind 41665 points

    Murali Manohar said:
    Is there way to do more that 3 images overlay using display subsystem pipelines. If not, is there any other mechanism to perform using platform capabilities (other than doing in software)?

    The typical solution here would be software as the display hardware only has three planes to be mixed/overlaid for the display output, much like the OMAP35xx display pipelines. You could accelerate this type of operation using the NEON on the Cortex-A8 or perhaps the SGX, though those could also be considered software, and the use of the SGX is really restricted to OpenGLES APIs so it is not as flexible.

    Murali Manohar said:
    Can 2D accelarator or VPFE used for this purpose?

    There is no real 2D accelerator on the AM3517, one could say that the SGX has some 2D abilities though it is not a typical blitter, it can only manage vector graphics operations. The VPFE has no mixing/overlay capabilities like this really, only scaling and conversion functions.