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Re: SDL2 + POGL2 + PDL confluence

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From:
Chris Marshall
Date:
August 16, 2013 13:38
Subject:
Re: SDL2 + POGL2 + PDL confluence
Message ID:
CAPTtexLth14Uvyh4v-O9YPDCSRmD-xBQHXzOrmBFmL1DtoN4SA@mail.gmail.com
On Thu, Aug 15, 2013 at 6:05 PM, Kartik Thakore
<thakore.kartik@gmail.com> wrote:
>
> I am definitely interested in helping with this. Perhaps we should make a
> test module that tests just these integration.
>
> It will get latest branches of the 3 projects and run tests.
>
> What do you think?

I'm glad to see the interest but most of the base work
is still needing to be done as far as the OpenGL stuff.
We need modern OpenGL support in POGL before a lot of
the specific development can occur.

However, one important piece that could be investigated
is how we could make conversion between SDL2 objects
and PDL objects work.  Ideally we could have a fast
conversion to take a piddle and use it for an SDL2 surface
or texture or whatever and similarly for the other direction.

Currently, the approach used for SDL is to create the PDL
object with the right sized data segment and then pass that
to SDL to make a surface from that.  I'm not sure what would
work for SDL2 stuff.

--Chris

> On Thu, Aug 15, 2013 at 1:11 PM, Chris Marshall <devel.chm.01@gmail.com>
> wrote:
>>
>> PDL/SDL/OpenGL users-
>>
>> With the recently announced SDL2 release and in-progress work
>> to provide perl bindings for the same, I wanted to share my
>> thoughts for leveraging joint capabilities of these three
>> modules with a couple of specific points.
>>
>> 1) SDL2 brings integrated hardware acceleration via Direct3D and/or
>> OpenGL to both 2D and 3D graphics. This offers the possiblity
>> of using modern OpenGL API features like renderbuffers for
>> computation and display.
>>
>> 2) PDL provides a high level array computation language that
>> can be used as a back-end engine for SDL applications and
>> visualization. The PDL::Graphics::TriD currently uses
>> the OpenGL-1.x fixed pipeline interface.
>>
>> 3) Perl OpenGL currently supports the original fixed-pipeline
>> display process of OpenGL-1.x and some 2.x functionality.
>> Work is underway to update the support to modern OpenGL
>> APIs such as OpenGL-3.x, OpenGLES,...
>>
>> The common thread here is OpenGL, and I think that by updating
>> the OpenGL use and interfaces to the modern programmable display
>> pipeline we can generate significant synergy between the
>> projects:
>>
>> 1) Update Perl OpenGL to modern OpenGL (In progress by slowed
>> by the fact that my development time is spread too thin.
>> Am I the only one with a whole slew of projects for which
>> I know *exactly* what and how to do them but not having
>> the time to execute? :-)
>>
>> 2) Refactor PDL::Graphics::TriD to use modern OpenGL for
>> display rather than the fixed-function pipeline of OpenGL
>> API 1.x.
>>
>> 3) Update PDL to support (simply) the use of arbitrary
>> sources of data (e.g., I'm thinking framebuffer and
>> renderbuffer objects but deliberately being more
>> general since I could also imagine some sort of
>> generator that could act like a piddle for computation
>> with PDL).
>>
>> 4) Add GPGPU support to PDL computation.
>>
>> 5) Add support to the perl SDL2 interface to allow easy
>> mix and match operation with PDL for computation, IO,
>> and visualization. I could see PDL+GPGPU computing
>> working well with realtime game or display computations.
>>
>> Well, the above ideas have a some hand waving to make them
>> happen, but I think the pieces are there.
>>
>> Comments?
>> Chris

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