GLGETQUERYOBJECT - Online Linux Manual PageSection : 3G
Updated : 01/20/2022
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NAMEglGetQueryObject − return parameters of a query object

C SPECIFICATIONvoid glGetQueryObjectiv(GLuint id, GLenum pname, GLint * params); void glGetQueryObjectuiv(GLuint id, GLenum pname, GLuint * params); void glGetQueryObjecti64v(GLuint id, GLenum pname, GLint64 * params); void glGetQueryObjectui64v(GLuint id, GLenum pname, GLuint64 * params);

PARAMETERSid Specifies the name of a query object​. pname Specifies the symbolic name of a query object parameter​. Accepted values are GL_QUERY_RESULT or GL_QUERY_RESULT_AVAILABLE​. params If a buffer is bound to the GL_QUERY_RESULT_BUFFER target, then params is treated as an offset to a location within that buffer's data store to receive the result of the query​. If no buffer is bound to GL_QUERY_RESULT_BUFFER, then params is treated as an address in client memory of a variable to receive the resulting data​.

DESCRIPTIONglGetQueryObject returns in params a selected parameter of the query object specified by id​. pname names a specific query object parameter​. pname can be as follows: GL_QUERY_RESULT params returns the value of the query object's passed samples counter​. The initial value is 0​. GL_QUERY_RESULT_NO_WAIT If the result of the query is available (that is, a query of GL_QUERY_RESULT_AVAILABLE would return non−zero), then params returns the value of the query object's passed samples counter, otherwise, the data referred to by params is not modified​. The initial value is 0​. GL_QUERY_RESULT_AVAILABLE params returns whether the passed samples counter is immediately available​. If a delay would occur waiting for the query result, GL_FALSE is returned​. Otherwise, GL_TRUE is returned, which also indicates that the results of all previous queries are available as well​.

NOTESIf an error is generated, no change is made to the contents of params​. glGetQueryObject implicitly flushes the GL pipeline so that any incomplete rendering delimited by the occlusion query completes in finite time​. If multiple queries are issued using the same query object id before calling glGetQueryObject, the results of the most recent query will be returned​. In this case, when issuing a new query, the results of the previous query are discarded​. glGetQueryObjecti64v and glGetQueryObjectui64v are available only if the GL version is 3​.3 or greater​. GL_QUERY_RESULT_NO_WAIT is accepted for pname only if the GL version is 4​.4 or greater​. The GL_QUERY_RESULT_BUFFER target is available only if the GL version is 4​.4 or higher​. On earlier versions of the GL, params is always an address in client memory​.

ERRORSGL_INVALID_ENUM is generated if pname is not an accepted value​. GL_INVALID_OPERATION is generated if id is not the name of a query object​. GL_INVALID_OPERATION is generated if id is the name of a currently active query object​. GL_INVALID_OPERATION is generated if a buffer is currently bound to the GL_QUERY_RESULT_BUFFER target and the command would cause data to be written beyond the bounds of that buffer's data store​.

VERSION SUPPORT OpenGL Version Function / Feature Name 2​.0 none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'> 2​.1 3​.0 3​.1 3​.2 3​.3 4​.0 4​.1 4​.2 4​.3 4​.4 4​.5 glGetQueryObjecti64v glGetQueryObjectiv glGetQueryObjectui64v glGetQueryObjectuiv

SEE ALSOglBeginQuery(), glEndQuery, glGetQueryiv(), glIsQuery(), glQueryCounter()

COPYRIGHTCopyright © 2005 Addison−Wesley​. Copyright © 2010−2014 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/​.

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Copyright © 2005 Sams Publishing
Copyright © 2010-2014 Khronos Group
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