From the code you are right I think.
Stretchblit is implemented on the SH7722, but not on the SH7723 (and
never has been, afaik). Not sure why this is.. Don't know the
differences between these chips.
Greets
Niels
Markus Pietrek wrote:
Hello,
there is a report that Stretch Blit is hardware accelerated on the
SH7722.
http://directfb.org/index.php?path=Main%2FNews&entry=2007-09-21-0.dok
When I recently checked out DirectFB from git and ran df_dok on the
SH7723 (Renesas SH7723 0.9), I noted that Stretch Blit is no longer
reported as being hardware accelerated.
$ df_dok --stretch_blit
[...]
Stretch Blit 14.459 secs ( 2.295 MPixels/sec) [17.5%]
Blit is still hardware accelerated
$ df_dok --blit
[...]
Blit 3.494 secs (* 1.875 MPixel/sec) [2.2%]
Yet the driver's code itself has implemented StretchBlit in
DirectFB/gfxdrivers/sh772x/sh7722_blt.c:sh7722SetState/sh7722DoBlit()
Are there special requirements to use Stretch Blitting?
Mit freundlichen Grüßen / Best Regards
Markus Pietrek
Software engineer
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