CODEWITHSUNDEEP
openglglsl
Danny Ruijters
Danny Ruijters

Reputation: 3429

GLSL: What version is used when no version is specified?

When there is no version specified in the first line of a GLSL shader (so nothing like "#version 330", which version is actually used?

Is it vendor (or even driver) specific?

Upvotes: 2

Views: 1610

Answers (1)

vallentin
vallentin

Reputation: 26245

What is the default GLSL version?

  • Assume the default version is 1.10
  • Note that the #version directive always must be on the first line

The #version directive must appear before anything else in a shader, save for whitespace and comments. If a #version directive does not appear at the top, then it assumes 1.10, which is almost certainly not what you want.

– OpenGL Wiki

If it's in relation to combining sources, then you could leave out the #version directive and do something like this:

const GLsizei stringCount = 2;
const GLchar *strings[stringCount] = {
    "#version 330 core\n",
    shaderSource,
};

glShaderSource(shader, stringCount, strings, NULL);

Upvotes: 6

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