Well by the minimap I mean you create a mapping of what part of buffer data is where, wether it is processed in CPU or in GPU or over the network. By this way You reduce the tranfer of data. Basically in GPU the costliest thing is the Data transfer than the processing.
I dont feel such thing is used frequently but if you want to make a unified memory architechture then it would be much better. This thing will easily fit into the GEGL api.
I dint said OpenCL can not be used I just said OpenGl can do all the things needed and OpenCL or CUDA although can do this but they would be extra burden. OpenCl and CUDA use the Unified Compute architechture but I feel Gimp has much more worries of Data Transfer than the computation.
CUDA or OpenCL is used best in places where large computation and less transfer is needed. I hope you understand. By this way of mapping you not only save the Data Tranfer but the architechture is much more usable even of you try Cloud Computing.
On Mon, May 11, 2009 at 4:03 PM, Jerson Michael Perpetua <jersonperpetua@xxxxxxxxx> wrote:
Hello,
Sorry that you feel that way. I did tell the GIMP and GEGL
developer's during proposal period that I had no previous experience
with OpenGL. Moreover, you can read from my mailing list posts that I
admit to being a beginner in OpenGL, GObjects and GEGL. I can't
really speculate why they accepted me against someone experienced like
you. But one thing's for sure, I can and am willing to learn.
As to me being off-track, maybe we are approaching the same problem in
different perspectives? What I've written in my GSoC proposal is a
very murky way of parallelizing pixel operations by loading buffer
image data into OpenGL textures and using those textures inside
shaders. It's now extended into off-loading pixel data copy
operations and conversions to the GPU, so that the CPU can save
several cycles to do other tasks. In my view, OpenCL and similar APIs
aren't very different with respect to how I am envisioning to use
OpenGL for GEGL. I don't see why I can't use those so called
computing languages. Sure, I'm not positive that all operations could
be rewritten into shaders. What I'm sure is that the very basic of
them I could implement in time for GSoC.
I'm curious about your mention of minimaps though. I haven't really
heard about them being used in GPGPU techniques. The only thing I
know about minimaps is that they are "miniature map[s], often placed
in a corner of the screen in computer games to aid in reorientation"
[from Wikipedia]. Maybe you can shed some light into this dark mind?
Respectfully yours,
Daerd
--
Utkarsh Shukla,
Btech, Material Science and Metallurgy,
IIT KANPUR.
Mob: 9936339580
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