NAME

       glDebugMessageCallback - specify a callback to receive debugging messages from the GL

C SPECIFICATION

       void glDebugMessageCallback(DEBUGPROC callback, void * userParam);

PARAMETERS

       callback
           The address of a callback function that will be called when a debug message is generated.

       userParam
           A user supplied pointer that will be passed on each invocation of callback.

DESCRIPTION

       glDebugMessageCallback sets the current debug output callback function to the function whose address is
       given in callback. The callback function should have the following prototype (in C), or be otherwise
       compatible with such a prototype:

                   typedef void (APIENTRY *DEBUGPROC)(GLenum source,
                       GLenum type,
                       GLuint id,
                       GLenum severity,
                       GLsizei length,
                       const GLchar *message,
                       void *userParam);

       This function is defined to have the same calling convention as the GL API functions. In most cases this
       is defined as APIENTRY, although it will vary depending on platform, language and compiler.

       Each time a debug message is generated the debug callback function will be invoked with source, type, id,
       and severity associated with the message, and length set to the length of debug message whose character
       string is in the array pointed to by message userParam will be set to the value passed in the userParam
       parameter to the most recent call to glDebugMessageCallback.

NOTES

       When the GL is in use remotely, the server may not be able to call functions in the client's address
       space. In such cases, the callback function may not be invoked and the user should retrieve debug
       messages from the context's debug message log by calling glGetDebugMessageLog().

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                   │     │     │     │     │     │     │     │     │     │     │     │     │
       ├───────────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
       │glDebugMessageCallback │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  ✔  │  ✔  │  ✔  │
       └───────────────────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘

SEE ALSO

       glDebugMessageControl(), glDebugMessageInsert(), glGetDebugMessageLog().

COPYRIGHT

       Copyright © 2013-2014 Khronos Group. This material may be distributed subject to the terms and conditions
       set forth in the Open Publication License, v 1.0, 8 June 1999.  http://opencontent.org/openpub/.

COPYRIGHT

       Copyright © 2013-2014 Khronos Group

[FIXME: source]                                    01/03/2018                           GLDEBUGMESSAGECALLBA(3G)