Are all versions of GLSL and OpenGL compatible?

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I've been working through an openGL tutorial that simply renders a shape. I think all my code is correct however when i compile and run the code there is no shape rendered.

Is every version of GLSL compatible with every version of OpenGL?

Posted 8-Jan-13 14:27pm

Member 9731806

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Sergey Alexandrovich Kryukov 8-Jan-13 21:04pm

You thinking does not look convincing to me. If you blame GLSL.., perhaps you could get the shape rendering, but without proper shading, and then you would have to blame your code instead. After all, you could test it all with some simplified rendering, not using GLSL; is something like that possible?
—SA

Shao Voon Wong 8-Jan-13 21:30pm

There are different versions of GLSL. Have you checked whether your graphics card support that GLSL version you are using? Is there any error in the shader compilation?

Member 9731806 8-Jan-13 21:57pm

i don't think there are any errors with the shader. Errors are thrown if the shader cant load and there aren't any showing up.

Shao Voon Wong 8-Jan-13 22:19pm

OpenGL API is a C language based. They don't throw exceptions unless the C++ wrapper you are using, does that. You should always check for shader compilation errors. I think you are better off posting your shader code and your graphics card specs in an new question. Right now, I can only wild-guess what went wrong.

Sergey Alexandrovich Kryukov 9-Jan-13 10:50am

About C, this is not exactly so. Do you understand that there is no a concept of exception in C, but still C code can throw exception, due to the design of the OS? I you don't, I can explain it. So, be sure: an exception can be thrown by C code.
—SA

Sergey Alexandrovich Kryukov 9-Jan-13 10:48am

"I don't think" is not convincing. You can do appropriate testing to isolate possible problems.
—SA

Santhosh G_ 9-Jan-13 13:47pm

Please post the shader code, then we can identify the possible reason.
Compilers of some hardware venders are strict, I got different results on compiling same shader program in different machines. http://www.codeproject.com/Articles/89337/GLSL-Shader-for-Interpolating-Two-Textures#_comments

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Are all versions of GLSL and OpenGL compatible?

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