Re: [Haskell-cafe] Pixel plotter
On Oct 19, 2007, at 15:14 , Andrew Coppin wrote: Peter Verswyvelen wrote: I find it a petty the library does not work with GHCi :-( It has to do with the threaded RTS I guess. Any hints how I could fix this? Yeah, lots of things seem to dislike running in GHCi. (I'm guessing this is to do with trying to talk to C from inside an interpreter... I don't really know for sure why it doesn't work, but it doesn't surprise me.) Could be that (but I think unlikely), or threading (common; gtk2hs has hacks specifically for ghci/runghc), or special initialization needed for windowing programs (I think Windows requires this, and I know OSX does). -- brandon s. allbery [solaris,freebsd,perl,pugs,haskell] [EMAIL PROTECTED] system administrator [openafs,heimdal,too many hats] [EMAIL PROTECTED] electrical and computer engineering, carnegie mellon universityKF8NH ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Pixel plotter
Peter Verswyvelen wrote: Yeah I missed that too at first sight... A hint to the author: rename this into README.WIN32.txt or something :-) But I don't think the author of that library reads this mailing list? Mmm... I suppose technically somebody could submit a Darcs patch? ;-) [Darcs even has special support for renaming files...] I find it a petty the library does not work with GHCi :-( It has to do with the threaded RTS I guess. Any hints how I could fix this? Yeah, lots of things seem to dislike running in GHCi. (I'm guessing this is to do with trying to talk to C from inside an interpreter... I don't really know for sure why it doesn't work, but it doesn't surprise me.) ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Pixel plotter
I find it a petty the library does not work with GHCi :-( It has to do with the threaded RTS I guess. Any hints how I could fix this? Not sure how useful this is, but it works for me. I have a toy project that uses OpenGL and SDL and I have no problems running it from within GHCi in Linux. Perhaps the problem can be narrowed down to Windows. My versions: GHC-6.6.1 SDL-0.4.0 ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Pixel plotter
Bit Connor wrote: There should be a WIN32 file with instructions for installing on windows. Thanks. I didn't spot that... ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Pixel plotter
There should be a WIN32 file with instructions for installing on windows. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Pixel plotter
On Sunday 14 October 2007 13:31:56 Andrew Coppin wrote: PS. I've investigated existing APIs and I'm not seeing anything that looks useful. Lots of support for drawing lines and arcs and so on, but not for plotting individual pixels. I highly recommend OpenGL. Even if you are just filling texture maps for now, you have a future proof way to do far more sophisticated graphics. -- Dr Jon D Harrop, Flying Frog Consultancy Ltd. http://www.ffconsultancy.com/products/?e ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Pixel plotter
Jon Harrop wrote: On Sunday 14 October 2007 13:31:56 Andrew Coppin wrote: PS. I've investigated existing APIs and I'm not seeing anything that looks useful. Lots of support for drawing lines and arcs and so on, but not for plotting individual pixels. I highly recommend OpenGL. Even if you are just filling texture maps for now, you have a future proof way to do far more sophisticated graphics. ...just... the irony of using OpenGL to write a software ray tracer. ;-) Oh, and the irony of using OpenGL (an API of unimaginable complexity) just to write pixels to the screen. Isn't that kind of like using a thermonuclear device to crack a nut? ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Pixel plotter
On 14/10/2007, Andrew Coppin [EMAIL PROTECTED] wrote: Jon Harrop wrote: On Sunday 14 October 2007 13:31:56 Andrew Coppin wrote: PS. I've investigated existing APIs and I'm not seeing anything that looks useful. Lots of support for drawing lines and arcs and so on, but not for plotting individual pixels. I highly recommend OpenGL. Even if you are just filling texture maps for now, you have a future proof way to do far more sophisticated graphics. ...just... the irony of using OpenGL to write a software ray tracer. ;-) Oh, and the irony of using OpenGL (an API of unimaginable complexity) just to write pixels to the screen. Isn't that kind of like using a thermonuclear device to crack a nut? OpenGL is used as a pixel-plotting mechanism relatively often. You wouldn't be doing anything new if you did it that way. I say someone binds SDL[1]. (If it hasn't been done already.) - Jeremy [1] - http://libsdl.org ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Pixel plotter
I say someone binds SDL[1]. (If it hasn't been done already.) Ask and you shall receive: http://darcs.haskell.org/~lemmih/hsSDL/ I use those SDL bindings to plot pixels with OpenGL and play with 3D stuff in Haskell. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Pixel plotter
Andrew said: Oh, and the irony of using OpenGL (an API of unimaginable complexity) just to write pixels to the screen. Isn't that kind of like using a thermonuclear device to crack a nut? Saying that using OpenGL to write pixels to the screen is like using a thermonuclear device to crack a nut, is like saying that using a computer to edit files is like using a thermal lance to slice butter. (Do you like my higher order simile?) Incidentally, people raytrace with OpenGL all the time via GPGPU: http://www.gpgpu.org/cgi-bin/blosxom.cgi/Advanced%20Rendering/index.html I'm looking forward to someone implementing a nice Haskell API to all that yummy GPGPU stuff, like Python's http://www.cs.lth.se/home/Calle_Lejdfors/pygpu/ (I've heard rumours...) -- Dan ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Pixel plotter
Interesting! I just wanted to reply (although Andrew Coppin must have unsubscribed by now...) that I have an application that plots pixels using OpenGL (it's actually not that hard, just visit the new Haskell OpenGL page, and look at the examples given, e.g. http://darcs.haskell.org/packages/GLUT/examples/RedBook/Image.hs). But the SDL stuff seems easier... Thanks, Peter Verswyvelen Roel van Dijk wrote: I say someone binds SDL[1]. (If it hasn't been done already.) Ask and you shall receive: http://darcs.haskell.org/~lemmih/hsSDL/ I use those SDL bindings to plot pixels with OpenGL and play with 3D stuff in Haskell. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Pixel plotter
YEEESSS!! W00t11 I've been looking for that for a long time. I get so sick of glut... Thanks. Luke On 10/14/07, Roel van Dijk [EMAIL PROTECTED] wrote: I say someone binds SDL[1]. (If it hasn't been done already.) Ask and you shall receive: http://darcs.haskell.org/~lemmih/hsSDL/ I use those SDL bindings to plot pixels with OpenGL and play with 3D stuff in Haskell. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Pixel plotter
Andrew Coppin: As far as I know, all of this is *possible* with Gtk2hs right now - it's just vastly more complex than making a single function call. So what I'd like to do is write a small library which will enable me to do each of the above tasks in 1 function call. However, I'm getting nowhere fast with this. Anybody have any suggestions? Despite having a large API gtk2hs is pretty easy to use for these kind of tasks. You can look at this library [1] (for plotting charts) to see simple examples of opening windows, saving images etc. It uses the (nice) 2D cairo API for drawing, though it's not too hard to work with raw pixels via the functions in Graphics.UI.Gtk.Gdk.Pixbuf. You'll need to restrict your drawing calls to a single thread - most GUI toolkits will require this. Haskell makes this easy through its ability to pass drawing actions from thread to thread. Tim [1] http://hackage.haskell.org/cgi-bin/hackage-scripts/package/Chart-2007.8.8 ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
