GLAPI/glGetShaderInfoLog: Difference between revisions

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== Function Definition ==
== Function Definition ==


   void '''glGetShaderInfoLog'''(GLuint ''shader'', GLsizei ''maxLength'', GLsizei *''length'', GLchar *''infoLog'');
   void '''glGetShaderInfoLog'''(GLuint {{param|shader}}, GLsizei {{param|maxLength}}, GLsizei *{{param|length}}, GLchar *{{param|infoLog}});


; shader
; shader
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: Specifies the size of the character buffer for storing the returned information log.
: Specifies the size of the character buffer for storing the returned information log.
; length
; length
: Returns the length of the string returned in ''infoLog'' (excluding the null terminator).
: Returns the length of the string returned in {{param|infoLog}} (excluding the null terminator).
; infoLog
; infoLog
: Specifies an array of characters that is used to return the information log.
: Specifies an array of characters that is used to return the information log.
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'''glGetShaderInfoLog''' returns the information log for the specified shader object. The information log for a shader object is modified when the shader is compiled. The string that is returned will be null terminated.
'''glGetShaderInfoLog''' returns the information log for the specified shader object. The information log for a shader object is modified when the shader is compiled. The string that is returned will be null terminated.


'''glGetShaderInfoLog''' returns in ''infoLog'' as much of the information log as it can, up to a maximum of ''maxLength'' 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 {{code|NULL}} can be passed in the ''length'' argument. The size of the buffer required to store the returned information log can be obtained by calling [[GLAPI/glGetShader|glGetShader]] with the value {{code|GL_INFO_LOG_LENGTH}}.
'''glGetShaderInfoLog''' returns in {{param|infoLog}} as much of the information log as it can, up to a maximum of {{param|maxLength}} characters. The number of characters actually returned, excluding the null termination character, is specified by {{param|length}}. If the length of the returned string is not required, a value of {{code|NULL}} can be passed in the {{param|length}} argument. The size of the buffer required to store the returned information log can be obtained by calling {{apifunc|glGetShader}} with the value {{enum|GL_INFO_LOG_LENGTH}}.


The information log for a shader object is a string that may contain diagnostic messages, warning messages, and other information about the last compile operation. When a shader object is created, its information log will be a string of length 0.
The information log for a shader object is a string that may contain diagnostic messages, warning messages, and other information about the last compile operation. When a shader object is created, its information log will be a string of length 0.
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== Errors ==
== Errors ==


{{code|GL_INVALID_VALUE}} is generated if ''shader'' is not a value generated by OpenGL.
{{enum|GL_INVALID_VALUE}} is generated if {{param|shader}} is not a value generated by OpenGL.


{{code|GL_INVALID_OPERATION}} is generated if ''shader'' is not a shader object.
{{enum|GL_INVALID_OPERATION}} is generated if {{param|shader}} is not a shader object.


{{code|GL_INVALID_VALUE}} is generated if ''maxLength'' is less than 0.
{{enum|GL_INVALID_VALUE}} is generated if {{param|maxLength}} is less than 0.


== Associated Gets ==
== Associated Gets ==


[[GLAPI/glGetShader|glGetShader]] with argument {{code|GL_INFO_LOG_LENGTH}}
{{apifunc|glGetShader}} with argument {{enum|GL_INFO_LOG_LENGTH}}


[[GLAPI/glIsShader|glIsShader]]
{{apifunc|glIsShader}}


== See Also ==
== See Also ==


[[GLAPI/glCompileShader|glCompileShader]], [[GLAPI/glGetProgramInfoLog|glGetProgramInfoLog]], [[GLAPI/glLinkProgram|glLinkProgram]], [[GLAPI/glValidateProgram|glValidateProgram]]
{{apifunc|glCompileShader}}, {{apifunc|glGetProgramInfoLog}}


== Copyright ==
== Copyright ==
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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/ http://opencontent.org/openpub/].
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/ http://opencontent.org/openpub/].


[[Category:API Reference 4|GetShaderInfoLog]]
[[Category:Core API Reference|GetShaderInfoLog]]
[[Category:GL 4 API Shader Program Creation|GetShaderInfoLog]]
[[Category:Core API Ref Shader Program Creation|GetShaderInfoLog]]
[[Category:Shader Object API State Functions|GetShaderInfoLog]]

Latest revision as of 10:01, 15 August 2013

glGetShaderInfoLog
Core in version 4.6
Core since version 2.0

glGetShaderInfoLog: Returns the information log for a shader object

Function Definition

 void glGetShaderInfoLog(GLuint shader​, GLsizei maxLength​, GLsizei *length​, GLchar *infoLog​);
shader
Specifies the shader object whose information log is to be queried.
maxLength
Specifies the size of the character buffer for storing the returned information log.
length
Returns the length of the string returned in infoLog​ (excluding the null terminator).
infoLog
Specifies an array of characters that is used to return the information log.

Description

glGetShaderInfoLog returns the information log for the specified shader object. The information log for a shader object is modified when the shader is compiled. The string that is returned will be null terminated.

glGetShaderInfoLog returns in infoLog​ as much of the information log as it can, up to a maximum of maxLength​ 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 information log can be obtained by calling glGetShader with the value GL_INFO_LOG_LENGTH.

The information log for a shader object is a string that may contain diagnostic messages, warning messages, and other information about the last compile operation. When a shader object is created, its information log will be a string of length 0.

Notes

The information log for a shader object is the OpenGL implementer's primary mechanism for conveying information about the compilation process. Therefore, the information log can be helpful to application developers during the development process, even when compilation is successful. Application developers should not expect different OpenGL implementations to produce identical information logs.

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 maxLength​ is less than 0.

Associated Gets

glGetShader with argument GL_INFO_LOG_LENGTH

glIsShader

See Also

glCompileShader, glGetProgramInfoLog

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/.

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