🚀 go-pugleaf

I have seen other (pure) Java apps blit at 10 frames/second
(actual image blitting, not just refresh of drawn graphics primitives)
So it *can* do it if you tweak it right.

I am using an image that was created from a memory image source.
When I created the memory image source, I specified the same color space
as the panel had (using getColorSpace()) - I thought that perhaps the
problem
was a translation step between occurring for each pixel.

This did not help - how can I find out more about the execution path
followed when a blit is done so as to find the bottleneck?

Thanks!

-Benn

"John McGrath [TeamB]" wrote:

> On Mon, 23 Oct 2000 11:33:02 -0700, Benn Herrera wrote:
>
> > I am working on a hybrid Java GUI/C++ back end application
> > and have run into a major performance snag.  The C++ shared
> > library I am accessing through JNI does 3D rendering to an
> > image buffer provided by from the Java side.  The rendered
> > buffer is then displayed in a JPanel via the method drawImage.
> >
> > The blitting is terribly slow.  Using the same shared library
> > with a native front end, I get interactive speeds of 5-8 frames
> > per second.  With the Java front end i'm getting 2-3 frames per
> > second.
>
> Java's display mechanisms are fast enough for many applications, but it
> may be that they are not capable of displaying at the frame rates you
> need.
>
> One solution you might look at is the AWT Native Interface, which allows
> you to render part of the Java UI in native code.  I have not used it,
> but it sounds like it may be what you need.  For more information, see:
>
>     http://java.sun.com/j2se/1.3/docs/guide/awt/enhancements.html#native
>
> --
> Regards,
>
> John McGrath [TeamB]
>
> ---------------------------------------------------
> Before sending me e-mail, please read:
>     http://www.JPMcGrath.net/newsgroups/e-mail.html

--
Benn Herrera - Senior Software Engineer / Computing Operations
Resolution Sciences Corporation - http://www.resolve3d.com
527 Tamal Plaza, Corte Madera, CA 94925
T:415/945-7360xt27  F:415/945-7905  E:benn@resolve3d.com