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Ken Martin authored
Lots of changes to make VTK work with both 2.1 and 3.2 versions of OpenGL. The main differences in OpenGL 3.2 are that the following features no longer are supported intensity textures - recoded to use red luminanace textures - recoded to use red line stipple - vtk error macro querying extensions in one string - replaced with multiple calls pixel transfer bias and scale - recoded to be done in the shader glPush and PopAttrib - recoded to get and set instead texelFetchBuffer - defined to texelFetch txture1D - defined to texture texture3D - defined to texture
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