glGetShaderSource
3G
glGetShaderSource
Returns the source code string from a shader object
C Specification
void glGetShaderSource
GLuint shader
GLsizei bufSize
GLsizei *length
GLchar *source
Parameters
shader
Specifies the shader object to be
queried.
bufSize
Specifies the size of the character buffer for
storing the returned source code string.
length
Returns the length of the string returned in
source (excluding the null
terminator).
source
Specifies an array of characters that is used
to return the source code string.
Description
glGetShaderSource returns the
concatenation of the source code strings from the shader object
specified by shader. The source code
strings for a shader object are the result of a previous call to
glShaderSource.
The string returned by the function will be null
terminated.
glGetShaderSource returns in
source as much of the source code string
as it can, up to a maximum of bufSize
characters. The number of characters actually returned,
excluding the null termination character, is specified by
length. If the length of the returned
string is not required, a value of NULL can
be passed in the length argument. The
size of the buffer required to store the returned source code
string can be obtained by calling
glGetShader
with the value
GL_SHADER_SOURCE_LENGTH.
Errors
GL_INVALID_VALUE is generated if
shader is not a value generated by
OpenGL.
GL_INVALID_OPERATION is generated if
shader is not a shader object.
GL_INVALID_VALUE is generated if
bufSize is less than 0.
Associated Gets
glGetShader
with argument
GL_SHADER_SOURCE_LENGTH
glIsShader
See Also
glCreateShader,
glShaderSource
Copyright
Copyright 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/.