OpenGLSL error while compiling fragment shader using UBOs

Question

I am trying to get UBOs working, however I get a compilation error in the fragment shader:

ERROR 0:5:"(": synrax error.

Fragment Shader:

layout(std140) uniform Colors
{
    vec3  SCol;
    vec3  WCol;
    float DCool;
    float DWarm;
}colors;

Where am I going wrong?

Where's your #version directive? What's the value of GL_SHADING_LANGUAGE_VERSION? — genpfault
– genpfault, Commented Jan 22, 2013 at 16:53
If I add #version, it gives me another error: GLSL error: #version must occur before any other statement in the program — user1128265
– user1128265, Commented Jan 22, 2013 at 17:02
Please post your entire shader, and tell us what line 5 is. And if you're not using a #version declaration, please start. — Nicol Bolas
– Nicol Bolas, Commented Jan 22, 2013 at 19:33

Tomek · Accepted Answer · 2013-01-22 20:37:41Z

1

At the begining of your fragment shader source file (the very first line) put this:

#version 140

This means that you are telling the GLSL compiler that you use the version 1.40 of the shading language (you can, of course, use a higher version - see Wikipedia for details).

Alternatively, if your OpenGL driver (and/or hardware) doesn't support GLSL 1.40 fully (which is part of OpenGL 3.1), but only GLSL 1.30 (OpenGL 3.0), you can try the following:

#version 130
#extension GL_ARB_uniform_buffer_object : require

However, this one will work only if your OpenGL 3.0 driver supports the GL_ARB_uniform_buffer_object extension.

Hope this helps.

answered Jan 22, 2013 at 20:37

Tomek

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