Re: Best way to drawing a lot of strings
Posted by Sven Gothel on Apr 07, 2012; 10:14pm
URL: https://forum.jogamp.org/Best-way-to-drawing-a-lot-of-strings-tp3893249p3893505.html
On 04/07/2012 09:16 PM, Djak [via jogamp] wrote:
>
>
> Hi :)
>
> In an application I need to draw 2000-20000 strings and I'm looking for
> hints to preserve ressources in doing this.
>
> I was using com.jogamp.opengl.util.awt.TextRenderer ang get some relatively
> good performances for 2000 strings but "bad" for 5000 (about 15 fps).
>
> I followed some topics on the forum relative to
> com.jogamp.graph.curve.opengl.TextRenderer and after testing it I got about
> 0.5 fps for 2000 strings.The problem here is the caching of the curve intermediate data ('curve').
The latter changes when creating new strings.
Having the tessellated 'curve' data available, rendering is high performance.
We really need to look at this, i.e. caching and the GC / memory usage
in the current implementation. Probably fixing the latter will already
fix the performance problem, which appear on mobile in a very dramatic fashion.
> I don't know well the new TextRenderer for now but
> do you think there is no way to get higher performances using it than using
> old pre-renderered textures method in awt.TextRenderer ? (as it is said in
> another topic)
pre-rendered .. or cached 'curve' data (graph) would be the key here, yes.
>
> Else anyone may have advises for drawing a lot of strings with JOGL ?
> Strings are all differents and positions may change between two rendering.
Yup, we know about such problems and currently graph generates all new curve
data for the hw accel. rendering.
>
> Thanks in advance for help :)
Right now we have no fast solution. However, we will look into the graph
problems before siggraph.
~Sven
URL: https://forum.jogamp.org/Best-way-to-drawing-a-lot-of-strings-tp3893249p3893505.html
On 04/07/2012 09:16 PM, Djak [via jogamp] wrote:
>
>
> Hi :)
>
> In an application I need to draw 2000-20000 strings and I'm looking for
> hints to preserve ressources in doing this.
>
> I was using com.jogamp.opengl.util.awt.TextRenderer ang get some relatively
> good performances for 2000 strings but "bad" for 5000 (about 15 fps).
>
> I followed some topics on the forum relative to
> com.jogamp.graph.curve.opengl.TextRenderer and after testing it I got about
> 0.5 fps for 2000 strings.
The latter changes when creating new strings.
Having the tessellated 'curve' data available, rendering is high performance.
We really need to look at this, i.e. caching and the GC / memory usage
in the current implementation. Probably fixing the latter will already
fix the performance problem, which appear on mobile in a very dramatic fashion.
> I don't know well the new TextRenderer for now but
> do you think there is no way to get higher performances using it than using
> old pre-renderered textures method in awt.TextRenderer ? (as it is said in
> another topic)
pre-rendered .. or cached 'curve' data (graph) would be the key here, yes.
>
> Else anyone may have advises for drawing a lot of strings with JOGL ?
> Strings are all differents and positions may change between two rendering.
Yup, we know about such problems and currently graph generates all new curve
data for the hw accel. rendering.
>
> Thanks in advance for help :)
Right now we have no fast solution. However, we will look into the graph
problems before siggraph.
~Sven
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