July 2009 - HOpenGL - Haskell.org

problems running SmoothOpenGL3
by Michael [Plouj] Ploujnikov 02 Aug '09

02 Aug '09

Hi, I wanted to give the new SmoothOpenGL3.hs example a try, but I ran into a strange problem with it. Prior to trying this example, I unregistered the old OpenGL and GLUT packages and installed new ones with cabal. Below is a list of all the Haskell packages on my system: $ ghc-pkg list /usr/lib64/ghc-6.10.3/./package.conf: Cabal-1.6.0.3, HUnit-1.2.0.3, QuickCheck-1.2.0.0, X11-1.4.5, array-0.2.0.0, base-3.0.3.1, base-4.1.0.0, bytestring-0.9.1.4, containers-0.2.0.1, directory-1.0.0.3, (dph-base-0.3), (dph-par-0.3), (dph-prim-interface-0.3), (dph-prim-par-0.3), (dph-prim-seq-0.3), (dph-seq-0.3), extensible-exceptions-0.1.1.0, filepath-1.1.0.2, (ghc-6.10.3), ghc-prim-0.1.0.0, haddock-2.4.2, haskell-src-1.0.1.3, haskell98-1.0.1.0, hpc-0.5.0.3, html-1.0.1.2, integer-0.1.0.1, mtl-1.1.0.2, network-2.2.1, old-locale-1.0.0.1, old-time-1.0.0.2, packedstring-0.1.0.1, parallel-1.1.0.1, parsec-2.1.0.1, pretty-1.0.1.0, process-1.0.1.1, random-1.0.0.1, regex-base-0.72.0.2, regex-compat-0.71.0.1, regex-posix-0.72.0.3, rts-1.0, stm-2.1.1.2, syb-0.1.0.1, template-haskell-2.3.0.1, time-1.1.3, unix-2.3.2.0, xhtml-3000.2.0.1, xmonad-0.8.1 /home/plouj/.ghc/x86_64-linux-6.10.3/package.conf: GLURaw-1.0.0.0, GLUT-2.2.0.0, ObjectName-1.0.0.0, OpenGL-2.3.0.0, OpenGLRaw-1.0.1.0, SDL-0.5.5, StateVar-1.0.0.0, Tensor-1.0.0.1, X11-xft-0.3, hinotify-0.2, utf8-string-0.3.5, xmonad-contrib-0.8.1 I copied SmoothOpenGL3.hs from the GLUT-2.2.0.0.tar.gz tarball into the current directory and here is what happened when I tried running it with runghc: $ runghc SmoothOpenGL3.hs SmoothOpenGL3.hs: /home/plouj/.cabal/lib/GLUT-2.2.0.0/ghc-6.10.3/HSGLUT-2.2.0.0.o: unknown symbol `glutGet' SmoothOpenGL3.hs: SmoothOpenGL3.hs: unable to load package `GLUT-2.2.0.0' $ ghc-pkg list|grep GLUT GLURaw-1.0.0.0, GLUT-2.2.0.0, ObjectName-1.0.0.0, OpenGL-2.3.0.0, $ nm /home/plouj/.cabal/lib/GLUT-2.2.0.0/ghc-6.10.3/HSGLUT-2.2.0.0.o|grep glutGet 0000000000007720 D GLUTzm2zi2zi0zi0_GraphicsziUIziGLUTziState_ptrzuglutGetModeValues_closure 0000000000045060 T GLUTzm2zi2zi0zi0_GraphicsziUIziGLUTziState_ptrzuglutGetModeValues_info U glutGet U glutGetColor U glutGetMenu U glutGetModifiers U glutGetProcAddress U glutGetWindow I get a similar problem in ghci: $ ghci GHCi, version 6.10.3: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer ... linking ... done. Loading package base ... linking ... done. Prelude> :l SmoothOpenGL3.hs [1 of 1] Compiling Main ( SmoothOpenGL3.hs, interpreted ) Ok, modules loaded: Main. *Main> main Loading package syb ... linking ... done. Loading package base-3.0.3.1 ... linking ... done. Loading package array-0.2.0.0 ... linking ... done. Loading package containers-0.2.0.1 ... linking ... done. Loading package OpenGLRaw-1.0.1.0 ... linking ... done. Loading package GLURaw-1.0.0.0 ... linking ... done. Loading package ObjectName-1.0.0.0 ... linking ... done. Loading package StateVar-1.0.0.0 ... linking ... done. Loading package Tensor-1.0.0.1 ... linking ... done. Loading package OpenGL-2.3.0.0 ... linking ... done. Loading package GLUT-2.2.0.0 ... linking ... <interactive>: /home/plouj/.cabal/lib/GLUT-2.2.0.0/ghc-6.10.3/HSGLUT-2.2.0.0.o: unknown symbol `glutGet' ghc: unable to load package `GLUT-2.2.0.0' Finally, this is what I get if I try to compile with 'ghc --make': $ ghc --make -lglut SmoothOpenGL3.hs # the linker fails without -lglut similar to this: http://www.haskell.org/pipermail/hopengl/2008-September/000756.html [1 of 1] Compiling Main ( SmoothOpenGL3.hs, SmoothOpenGL3.o ) Linking SmoothOpenGL3 ... $ ./SmoothOpenGL3 SmoothOpenGL3: user error (unknown GLUT call glutInitContextVersion, check for freeglut) $ ldd ./SmoothOpenGL3 linux-vdso.so.1 => (0x00007fffd25ff000) libglut.so.3 => /usr/lib64/libglut.so.3 (0x000000323c000000) libGLU.so.1 => /usr/lib64/libGLU.so.1 (0x0000003242000000) libGL.so.1 => /usr/lib64/libGL.so.1 (0x0000003241c00000) libm.so.6 => /lib64/libm.so.6 (0x0000003239400000) libgmp.so.3 => /usr/lib64/libgmp.so.3 (0x000000323bc00000) libdl.so.2 => /lib64/libdl.so.2 (0x0000003239800000) librt.so.1 => /lib64/librt.so.1 (0x000000323a400000) libc.so.6 => /lib64/libc.so.6 (0x0000003239000000) libXext.so.6 => /usr/lib64/libXext.so.6 (0x000000323b400000) libX11.so.6 => /usr/lib64/libX11.so.6 (0x000000323a800000) libXxf86vm.so.1 => /usr/lib64/libXxf86vm.so.1 (0x0000003248a00000) libstdc++.so.6 => /usr/lib64/libstdc++.so.6 (0x0000003243e00000) libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x0000003241000000) libXdamage.so.1 => /usr/lib64/libXdamage.so.1 (0x000000323ec00000) libXfixes.so.3 => /usr/lib64/libXfixes.so.3 (0x000000323cc00000) libdrm.so.2 => /usr/lib64/libdrm.so.2 (0x0000003242400000) libpthread.so.0 => /lib64/libpthread.so.0 (0x0000003239c00000) /lib64/ld-linux-x86-64.so.2 (0x0000003238c00000) libXau.so.6 => /usr/lib64/libXau.so.6 (0x000000323ac00000) libxcb.so.1 => /usr/lib64/libxcb.so.1 (0x000000323b000000) I'm not sure if this problem is specific to my setup or if it's a bug in the new GLUT/OpenGL packages. I would appreciate any help either way. -- http://plouj.com/

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Fwd: [Haskell] ANNOUNCE: GLUT 2.2.0.0
by Sven Panne 30 Jul '09

30 Jul '09

[ Ooops, I forgot to CC: to the HOpenGL mailing list... ] ---------- Weitergeleitete Nachricht ---------- Betreff: [Haskell] ANNOUNCE: GLUT 2.2.0.0 Datum: Mittwoch, 29. Juli 2009 Von: Sven Panne <Sven.Panne(a)aedion.de> An: Haskell Mailing List <haskell(a)haskell.org> A new version of the GLUT package has been uploaded to Hackage. It depends on the new OpenGL, StateVar and Tensor packages, but apart from that the API is unchanged. Furthermore, a simple, pure OpenGL 3.1 demo has been added, which does not rely on any deprecated OpenGL functionality (SmoothOpenGL3). Cheers, S.

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Fwd: [Haskell] ANNOUNCE: OpenGL 2.3.0.0
by Sven Panne 30 Jul '09

30 Jul '09

[ Ooops, I forgot to CC: to the HOpenGL mailing list... ] ---------- Weitergeleitete Nachricht ---------- Betreff: [Haskell] ANNOUNCE: OpenGL 2.3.0.0 Datum: Mittwoch, 29. Juli 2009 Von: Sven Panne <Sven.Panne(a)aedion.de> An: Haskell Mailing List <haskell(a)haskell.org> A new version of the OpenGL package has bee uploaded to Hackage. The main change is that it is now only a convenience layer upon the OpenGLRaw and GLURaw packages, written in in pure Haskell without the FFI. The latter two packages load the native libraries dynamically and do not rely on any C headers, making it possible to build all OpenGL-related packages even on machines without any installed native OpenGL support. Apart from that, a bug in vertexAttribPointer has been fixed. Cheers, S.

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ghci + glut + osx broken?
by Conal Elliott 30 Jul '09

30 Jul '09

When I run a glut progam in os x under ghci, I get strange behavior, including a blank white title bar (no red/orange/green buttons and no title). If I compile with ghc --make and run, i get a normal title bar. Asking on #haskell today [1], I hear that glut and ghci don't get along on os x. What's known about this problem? Is it fixable? I get a lot of value out of having a REPL, so I hope there's a solution. Thanks, - Conal [1] http://tunes.org/~nef/logs/haskell/09.07.26

5 4

Pure, garbage-collected graphics resources
by Conal Elliott 23 Jul '09

23 Jul '09

I'd like to use some OpenGL resources (VBOs, textures, shaders, and shader programs) in a functional way, with immutability, garbage collection, and IO-free creation interfaces. Has anyone played with doing such a thing? I guess the GC part would involve foreign pointers with foreign finalizers (which now run promptly in GHC iiuc). I don't know of any reliable way to add finalizers to Ptr values, because of the unboxing problem [1]. One tricky issue is that graphics context initialization must take place before any of these "pure" resources get evaluated. If the APIs allowed access to to multiple graphics contexts, things would get stickier. Comments? - Conal [1] http://www.haskell.org/ghc/docs/latest/html/libraries/base/System-Mem-Weak.…

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vertexAttribPointer undefined?
by Conal Elliott 18 Jul '09

18 Jul '09

I found this code in Graphics.Rendering.OpenGL.GL.VertexArrays in the OpenGL package, version 2.2.3.0: vertexAttribPointer :: AttribLocation -> StateVar (IntegerHandling, VertexArrayDescriptor a) vertexAttribPointer location = undefined makeStateVar (getVertexAttribPointer_ location) (setVertexAttribPointer location) Is that "undefined" intentional? When I remove "undefined", it works fine. - Conal

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Querying GL info, including # of texture units.
by Conal Elliott 07 Jul '09

07 Jul '09

I'm looking for a way to query the number of available texture units to shaders. In C, I think the value can be extracted with glGetIntegerv<http://www.opengl.org/sdk/docs/man/xhtml/glGet.xml>passing in GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS. There are also getInteger1 and GetMaxCombinedTextureImageUnits in Graphics.Rendering.OpenGL.GL.QueryUtils, but that module isn't exported from the OpenGL package. Have I missed something? - Conal

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