Provided by: opengl-4-man-doc_1.0~svn33624-1_all 
NAME
glGetError - return error information
C SPECIFICATION
GLenum glGetError(void);
DESCRIPTION
glGetError returns the value of the error flag. Each detectable error is assigned a
numeric code and symbolic name. When an error occurs, the error flag is set to the
appropriate error code value. No other errors are recorded until glGetError is called, the
error code is returned, and the flag is reset to GL_NO_ERROR. If a call to glGetError
returns GL_NO_ERROR, there has been no detectable error since the last call to glGetError,
or since the GL was initialized.
To allow for distributed implementations, there may be several error flags. If any single
error flag has recorded an error, the value of that flag is returned and that flag is
reset to GL_NO_ERROR when glGetError is called. If more than one flag has recorded an
error, glGetError returns and clears an arbitrary error flag value. Thus, glGetError
should always be called in a loop, until it returns GL_NO_ERROR, if all error flags are to
be reset.
Initially, all error flags are set to GL_NO_ERROR.
The following errors are currently defined:
GL_NO_ERROR
No error has been recorded. The value of this symbolic constant is guaranteed to be 0.
GL_INVALID_ENUM
An unacceptable value is specified for an enumerated argument. The offending command
is ignored and has no other side effect than to set the error flag.
GL_INVALID_VALUE
A numeric argument is out of range. The offending command is ignored and has no other
side effect than to set the error flag.
GL_INVALID_OPERATION
The specified operation is not allowed in the current state. The offending command is
ignored and has no other side effect than to set the error flag.
GL_INVALID_FRAMEBUFFER_OPERATION
The framebuffer object is not complete. The offending command is ignored and has no
other side effect than to set the error flag.
GL_OUT_OF_MEMORY
There is not enough memory left to execute the command. The state of the GL is
undefined, except for the state of the error flags, after this error is recorded.
GL_STACK_UNDERFLOW
An attempt has been made to perform an operation that would cause an internal stack to
underflow.
GL_STACK_OVERFLOW
An attempt has been made to perform an operation that would cause an internal stack to
overflow.
When an error flag is set, results of a GL operation are undefined only if
GL_OUT_OF_MEMORY has occurred. In all other cases, the command generating the error is
ignored and has no effect on the GL state or frame buffer contents. If the generating
command returns a value, it returns 0. If glGetError itself generates an error, it returns
0.
VERSION SUPPORT
┌───────────┬───────────────────────────────────────────────────────────────────────┐
│ │ OpenGL Version │
├───────────┼─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┤
│Function │ 2.0 │ 2.1 │ 3.0 │ 3.1 │ 3.2 │ 3.3 │ 4.0 │ 4.1 │ 4.2 │ 4.3 │ 4.4 │ 4.5 │
│/ │ │ │ │ │ │ │ │ │ │ │ │ │
│Feature │ │ │ │ │ │ │ │ │ │ │ │ │
│Name │ │ │ │ │ │ │ │ │ │ │ │ │
├───────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
│glGetError │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │
└───────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘
SEE ALSO
COPYRIGHT
Copyright © 1991-2006 Silicon Graphics, Inc. Copyright © 2010-2014 Khronos Group. This
document is licensed under the SGI This document is licensed under the SGI Free Software B
License. For details, see http://oss.sgi.com/projects/FreeB/.
COPYRIGHT
Copyright © 1991-2006 Silicon Graphics, Inc.
Copyright © 2010-2014 Khronos Group
[FIXME: source] 01/03/2018 GLGETERROR(3G)