03-09-2005
and to execute these unix commands through C program ... use system() library function...
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LEARN ABOUT OSX
glvalidateprogram
GLVALIDATEPROGRAM(3G) OpenGL 3.3 GLVALIDATEPROGRAM(3G)
NAME
glValidateProgram - Validates a program object
C SPECIFICATION
void glValidateProgram(GLuint program);
PARAMETERS
program
Specifies the handle of the program object to be validated.
DESCRIPTION
glValidateProgram checks to see whether the executables contained in program can execute given the current OpenGL state. The information
generated by the validation process will be stored in program's information log. The validation information may consist of an empty string,
or it may be a string containing information about how the current program object interacts with the rest of current OpenGL state. This
provides a way for OpenGL implementers to convey more information about why the current program is inefficient, suboptimal, failing to
execute, and so on.
The status of the validation operation will be stored as part of the program object's state. This value will be set to GL_TRUE if the
validation succeeded, and GL_FALSE otherwise. It can be queried by calling glGetProgram() with arguments program and GL_VALIDATE_STATUS. If
validation is successful, program is guaranteed to execute given the current state. Otherwise, program is guaranteed to not execute.
This function is typically useful only during application development. The informational string stored in the information log is completely
implementation dependent; therefore, an application should not expect different OpenGL implementations to produce identical information
strings.
NOTES
This function mimics the validation operation that OpenGL implementations must perform when rendering commands are issued while
programmable shaders are part of current state. The error GL_INVALID_OPERATION will be generated by any command that triggers the rendering
of geometry if:
o any two active samplers in the current program object are of different types, but refer to the same texture image unit,
o the number of active samplers in the program exceeds the maximum number of texture image units allowed.
It may be difficult or cause a performance degradation for applications to catch these errors when rendering commands are issued.
Therefore, applications are advised to make calls to glValidateProgram to detect these issues during application development.
ERRORS
GL_INVALID_VALUE is generated if program is not a value generated by OpenGL.
GL_INVALID_OPERATION is generated if program is not a program object.
ASSOCIATED GETS
glGetProgram() with arguments program and GL_VALIDATE_STATUS
glGetProgramInfoLog() with argument program
glIsProgram()
SEE ALSO
glLinkProgram(), glUseProgram()
COPYRIGHT
Copyright (C) 2003-2005 3Dlabs Inc. Ltd. 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/.
OpenGL 3.3 03/08/2011 GLVALIDATEPROGRAM(3G)