If the parameters of a function call do not match the set of parameters allowed by OpenGL, or do not interact reasonably with state that is already set in the context, then an OpenGL Error will result. The errors are presented as an error code.
With the exception of the multi-bind functions, all OpenGL functions that emit an error will have no effect. No OpenGL state will be changed, no rendering will be initiated. It will be as if the function had not been called.
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Testing for errors
Meaning of errors
The glGetError function returns one of the following error codes, or GL_NO_ERROR if no (more) errors are available. Each error code represents a category of user error.
- GL_INVALID_ENUM, 0x0500
- Given when an enumeration parameter is not a legal enumeration for that function. This is given only for local problems; if the spec allows the enumeration in certain circumstances, where other parameters or state dictate those circumstances, then GL_INVALID_OPERATION is the result instead.
- GL_INVALID_VALUE, 0x0501
- Given when a value parameter is not a legal value for that function. This is only given for local problems; if the spec allows the value in certain circumstances, where other parameters or state dictate those circumstances, then GL_INVALID_OPERATION is the result instead.
- GL_INVALID_OPERATION, 0x0502
- Given when the set of state for a command is not legal for the parameters given to that command. It is also given for commands where combinations of parameters define what the legal parameters are.
- GL_STACK_OVERFLOW, 0x0503
- Given when a stack pushing operation cannot be done because it would overflow the limit of that stack's size.
- GL_STACK_UNDERFLOW, 0x0504
- Given when a stack popping operation cannot be done because the stack is already at its lowest point.
- GL_OUT_OF_MEMORY, 0x0505
- Given when performing an operation that can allocate memory, and the memory cannot be allocated. The results of OpenGL functions that return this error are undefined; it is allowable for partial operations to happen.
- GL_INVALID_FRAMEBUFFER_OPERATION, 0x0506
- Given when doing anything that would attempt to read from or write/render to a framebuffer that is not complete.
- GL_TABLE_TOO_LARGE1, 0x8031
- Part of the ARB_imaging extension.