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glGetError problem

Started by ManaStone Sep 20, 2005 at 1:08 PM 2 replies 700+ views

Original Post

126

Sep 20, 2005 at 1:08 PM

Whenever I use this function I always get the GL_INVALID_OPERATION value returned. Even at the very beginning of the application I will repeatedly call the function and print out the return value but I always get GL_INVALID_OPERATION. Is the call itself causing the error? After the first call isn’t the flag supposed to be set to GL_NO_ERROR?

Brother Bob

Mod

218

Brother Bob

Sep 20, 2005 at 1:16 PM

Any function related to OpenGL requires a valid and active rendering context. Without it, nothing will work, and you should not trust any return values. I believe glGetError on Windows always returns GL_INVALID_OPERATION when the function is not attached to a particular implementation, which occurs at the point where the rendering context is made active.

zedzeek

164

zedzeek

Sep 20, 2005 at 2:45 PM

also see glIntercept if u run it during your program it will tell u exactly where errors are occuring

ManaStone

Author

126

ManaStone

Sep 20, 2005 at 2:48 PM

Quote:
Original post by Brother Bob
Any function related to OpenGL requires a valid and active rendering context. Without it, nothing will work, and you should not trust any return values. I believe glGetError on Windows always returns GL_INVALID_OPERATION when the function is not attached to a particular implementation, which occurs at the point where the rendering context is made active.

Thanks, that has also explained another problem I've been having.

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