[directfb-users] different blitting speed for surfaces other than layer's primary surface?

[Ha Nguyen]

Hello,

I'm trying to use DirectFB 1.4 5 for Opera browser with a BCM7405 STB
and noticed different blitting speeds from an source surface created
with description.caps = DSCAPS_VIDEOONLY from the super interface's
CreateSurface():
+) to a layer's primary surface created by layer->GetSurface(),
no-software, and same pixel format.It takes about 0.1ms.
+) to any surface created with description.caps = DSCAPS_VIDEOONLY
from the super interface's CreateSurface(), no-software, and same
pixel format. It takes about 1ms.

If I use "no-hardware" configuration, above blitting cases takes about 10ms.

So, can I ask if DirectFB prioritize layers' primary surface over
others surfaces when blitting, even when using hw accel? If not, could
you suggest how to create a surface to achieve similar blitting
performance as the layer's primary surface, please?

I created the surfaces like this:
sdsc.flags = DSDESC_CAPS | DSDESC_PIXELFORMAT | DSDESC_WIDTH | DSDESC_HEIGHT;
sdsc.caps = DSCAPS_VIDEOONLY
sdsc.pixelformat = DSPF_ARGB;
sdsc.width = screen_width;
sdsc.height = screen_height;
DFBCHECK(dfb->CreateSurface( dfb, &sdsc, &blitsurf ));

My box has two layers and I was thinking to use the non-primary
layer's primary surface to feed to Opera but it's only 720x422 size
while I need 720p.

Another notice is that while blitting on the layer's primary surface
is fast, flipping with DSFLIP_BLIT takes like 30 times slower. Is it
expected or it depends on the application how it is using the surface?

Thank you so much for your help,
Ha Nguyen

[Denis Oliver Kropp]

Post by Ha Nguyen
Hello,
I'm trying to use DirectFB 1.4 5 for Opera browser with a BCM7405 STB
and noticed different blitting speeds from an source surface created
with description.caps = DSCAPS_VIDEOONLY from the super interface's
+) to a layer's primary surface created by layer->GetSurface(),
no-software, and same pixel format.It takes about 0.1ms.
+) to any surface created with description.caps = DSCAPS_VIDEOONLY
from the super interface's CreateSurface(), no-software, and same
pixel format. It takes about 1ms.

Did you call IDirectFB::WaitIdle() before taking the second time stamp?

[Ha Nguyen]

Post by Denis Oliver Kropp

Post by Ha Nguyen
Hello,
I'm trying to use DirectFB 1.4 5 for Opera browser with a BCM7405 STB
and noticed different blitting speeds from an source surface created
with description.caps = DSCAPS_VIDEOONLY from the super interface's
+) to a layer's primary surface created by layer->GetSurface(),
no-software, and same pixel format.It takes about 0.1ms.
+) to any surface created with description.caps = DSCAPS_VIDEOONLY
from the super interface's CreateSurface(), no-software, and same
pixel format. It takes about 1ms.

Did you call IDirectFB::WaitIdle() before taking the second time stamp?

No, I didn't. Now blitting times are about the same, 2 or 3 ms. Thanks
for the input and promptly response.

Take care,
Ha Nguyen