Archives February 2014

It's not good, but it works...

So I wanted to work on a little web-toy that would let kids "hunt" for high frequency words  (basically vocabulary words that need to be immediately recognized) in a field of words. But as they don't necessarily know the words yet, it needs to be something that's read out audibly "Click on <blah>" and then I ...

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OSMesa Refactoring

We've had a binding/platform for the Off-Screen Mesa (OSMesa) library for a while now. It was originally coded such that it provided all of the OSMesa entry points from the platform package (not really appropriate, as these are the same level as things such as GLX and WGL). Long story short, they've been moved to ...

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PyOpenGL Working on the Raspberry Pi

I decided to use a USB key root for the RPi, and with that got a standard Raspbian setup going.  The really nice thing is that the EGL, GLES, etc entry points all resolved properly with the same code used for Linux/MESA EGL and GLES, yay.

Thing is, without the broadcom graphics module they're a ...

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Raspberry Pi BCM Window Needs Love

So as part of getting a PyOpenGL demo running on the Raspberry Pi I wrote a trivial subset of the Broadcom graphics interface api in ctypes.  There's an (abandoned? not very recent, anyway) full wrapper in Cython, but even getting that compiled just took too long for me working on the Pi (far longer than ...

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GL Arrogance Cleanup is Significant

There were (and still are) lots of places where PyOpenGL code assumed (assumes) that it is running GL. So far my cleanup efforts mean that on importing e.g. GLES1 you don't actually trigger a load of OpenGL. They also mean that most DLLs are lazy-loaded, something that means e.g. GLUT should no longer load on ...

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GL Arrogance

There are a number of places in PyOpenGL where GL has been arrogantly assumed. In particular, error handling and the shader/VBO convenience code.  The result was that you'd wind up having GL error-checking in GLES or trying to create GL VBOs under GLES. I've done a bit of refactoring to get the error-handling squared away, ...

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More consistency in array input/outputs

OpenGL often has situations where an argument is actually an output. PyOpenGL has traditionally wrapped those entry points such that they would be removed from the inputs and returned as an output.  I've just checked in code such that for most PyOpenGL entry points you can use either the Pythonic or the C-ish pattern (i.e. ...

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Step 2: Get an amd64-compatible VS 2010

So Python 3.3 and 3.4 require Visual Studio (Express) 2010 to compile extensions.  I already had my machine setup with Visual Studio Express 2008 + the platform SDK to get 32 and 64-bit compilers for Python 2.6 and 2.7, but to release for the 3.x's I needed to get the new compilers.  There is, however, ...

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Pygame-hosted EGL + ES1 works

So Pygame based EGL + OpenGL-ES1 context works with PyOpenGL 3.1 under Kubuntu amd64 with MESA EGL/GLES. Yay.

Really do need to get a couple SD cards ordered so I can port to the Raspberry Pi too. I expect that will be a matter of just getting the proper library-names defined in the platform loading ...

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