glCreateShader returns 0

OpenGL
1

Hi,

I’m currently trying to learn how to use the GLSL but I have this problem: whenever I call glCreateShader, with GL_FRAGMENT_SHADER or GL_VERTEX_SHADER, it returns 0…

I’m using SDL for the display but I don’t think it has an impact,I use GLee for the extentions, and whatever place I put the call, it returns 0.

Is there something to initialize? I don’t understand what’s going on.

If you have any idea please help.

2

is it possible its somewhere inside glBegin/glEnd calls?

3

It’s not…

EDIT:
OS:Windows XP Professional
dxdiag -> Intel® 89215G/GV/910GL Express Chipset
driver v6.14

4

What is your hardware configuration, OS, graphic driver version?

5

Try to use glCreateShaderObjectARB or glCreateShaderObject function instead.

6

is your context current?
i’ve seen people try to compile shaders in constructors before now, y’see.

7

I have GLee though it doesnt seem to have declared glCreateShaderObjectARB, what extention do I need?

@knackered, afaik it is…

8

GLee should have glCreateShaderObjectARB function declared. Are you using latest version, not some very old one?

Also - does your videocard/driver supports GL_ARB_shader_objects extension at all? Try chechking it with GLee:

if (GLEE_ARB_shader_objects == GL_FALSE)
{
   error("Sorry, GLSL shaders not supported!");
}
9

like always its better to download a working sample which uses shaders and see if it runs, just to be sure.

10

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