glGetDebugMessageLog - retrieve messages from the debug message log

glGet() with argument GL_DEBUG_LOGGED_MESSAGESglGet() with argument GL_DEBUG_NEXT_LOGGED_MESSAGE_LENGTHglGet() with argument GL_MAX_DEBUG_MESSAGE_LENGTHglGet() with argument GL_MAX_DEBUG_LOGGED_MESSAGES

GLuintglGetDebugMessageLog(GLuintcount,GLsizeibufSize,GLenum*sources,Glenum*types,GLuint*ids,GLenum*severities,GLsizei*lengths,GLchar*messageLog);

       Copyright © 2013-2014 Khronos Group

[FIXME: source]                                    11/18/2024                           GLGETDEBUGMESSAGELOG(3G)

glGetDebugMessageLog retrieves messages from the debug message log. A maximum of count messages are
       retrieved from the log. If sources is not NULL then the source of each message is written into up to
       count elements of the array. If types is not NULL then the type of each message is written into up to
       count elements of the array. If id is not NULL then the identifier of each message is written into up to
       count elements of the array. If severities is not NULL then the severity of each message is written into
       up to count elements of the array. If lengths is not NULL then the length of each message is written into
       up to count elements of the array.

       messageLog specifies the address of a character array into which the debug messages will be written. Each
       message will be concatenated onto the array starting at the first element of messageLog.  bufSize
       specifies the size of the array messageLog. If a message will not fit into the remaining space in
       messageLog then the function terminates and returns the number of messages written so far, which may be
       zero.

       If glGetDebugMessageLog returns zero then no messages are present in the debug log, or there was not
       enough space in messageLog to retrieve the first message in the queue. If messageLog is NULL then no
       messages are written and the value of bufSize is ignored.

GL_INVALID_VALUE is generated if count or bufSize is negative.

       glGetDebugMessageLog - retrieve messages from the debug message log

       Although debug messages may be enabled in a non-debug context, the quantity and detail of such messages
       may be substantially inferior to those in a debug context. In particular, a valid implementation of the
       debug message queue in a non-debug context may produce no messages at all.

count
           The number of debug messages to retrieve from the log.

       bufSize
           The size of the buffer whose address is given by messageLog.

       sources
           The address of an array of variables to receive the sources of the retrieved messages.

       types
           The address of an array of variables to receive the types of the retrieved messages.

       ids
           The address of an array of unsigned integers to receive the ids of the retrieved messages.

       severities
           The address of an array of variables to receive the severites of the retrieved messages.

       lengths
           The address of an array of variables to receive the lengths of the received messages.

       messageLog
           The address of an array of characters that will receive the messages.

glDebugMessageInsert(), glDebugMessageCallback(), glDebugMessageControl().

       ┌──────────────────────┬───────────────────────────────────────────────────────────────────────┐
       │                      │                OpenGLVersion                                         │
       ├──────────────────────┼─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┤
       │ 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                 │     │     │     │     │     │     │     │     │     │     │     │     │
       ├──────────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
       │ glGetDebugMessageLog │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  ✔  │  ✔  │  ✔  │
       └──────────────────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘