specify a callback to receive debugging messages from the GL
Signature
Parameters
| Variables | Description |
|---|---|
| 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
glDebugMessageInsert
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
glDebugMessageInsert
.
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
.
See Also
Copyright
Copyright
2012 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/
.