glgetbufferparameteriv(3g) [osx man page]
GLGETBUFFERPARAMETER(3G) OpenGL 3.3 GLGETBUFFERPARAMETER(3G) NAME
glGetBufferParameteriv - return parameters of a buffer object C SPECIFICATION
void glGetBufferParameteriv(GLenum target, GLenum value, GLint * data); PARAMETERS
target Specifies the target buffer object. The symbolic constant must be GL_ARRAY_BUFFER, GL_ELEMENT_ARRAY_BUFFER, GL_PIXEL_PACK_BUFFER, or GL_PIXEL_UNPACK_BUFFER. value Specifies the symbolic name of a buffer object parameter. Accepted values are GL_BUFFER_ACCESS, GL_BUFFER_MAPPED, GL_BUFFER_SIZE, or GL_BUFFER_USAGE. data Returns the requested parameter. DESCRIPTION
glGetBufferParameteriv returns in data a selected parameter of the buffer object specified by target. value names a specific buffer object parameter, as follows: GL_BUFFER_ACCESS params returns the access policy set while mapping the buffer object. The initial value is GL_READ_WRITE. GL_BUFFER_MAPPED params returns a flag indicating whether the buffer object is currently mapped. The initial value is GL_FALSE. GL_BUFFER_SIZE params returns the size of the buffer object, measured in bytes. The initial value is 0. GL_BUFFER_USAGE params returns the buffer object's usage pattern. The initial value is GL_STATIC_DRAW. NOTES
If an error is generated, no change is made to the contents of data. ERRORS
GL_INVALID_ENUM is generated if target or value is not an accepted value. GL_INVALID_OPERATION is generated if the reserved buffer object name 0 is bound to target. SEE ALSO
glBindBuffer(), glBufferData(), glMapBuffer(), glUnmapBuffer() COPYRIGHT
Copyright (C) 2005 Addison-Wesley. 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 GLGETBUFFERPARAMETER(3G)
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GLGETBUFFERSUBDATA(3G) OpenGL 3.3 GLGETBUFFERSUBDATA(3G) NAME
glGetBufferSubData - returns a subset of a buffer object's data store C SPECIFICATION
void glGetBufferSubData(GLenum target, GLintptr offset, GLsizeiptr size, GLvoid * data); PARAMETERS
target Specifies the target buffer object. The symbolic constant must be GL_ARRAY_BUFFER, GL_COPY_READ_BUFFER, GL_COPY_WRITE_BUFFER, GL_ELEMENT_ARRAY_BUFFER, GL_PIXEL_PACK_BUFFER, GL_PIXEL_UNPACK_BUFFER, GL_TEXTURE_BUFFER, GL_TRANSFORM_FEEDBACK_BUFFER, or GL_UNIFORM_BUFFER. offset Specifies the offset into the buffer object's data store from which data will be returned, measured in bytes. size Specifies the size in bytes of the data store region being returned. data Specifies a pointer to the location where buffer object data is returned. DESCRIPTION
glGetBufferSubData returns some or all of the data from the buffer object currently bound to target. Data starting at byte offset offset and extending for size bytes is copied from the data store to the memory pointed to by data. An error is thrown if the buffer object is currently mapped, or if offset and size together define a range beyond the bounds of the buffer object's data store. NOTES
If an error is generated, no change is made to the contents of data. ERRORS
GL_INVALID_ENUM is generated if target is not GL_ARRAY_BUFFER, GL_ELEMENT_ARRAY_BUFFER, GL_PIXEL_PACK_BUFFER, or GL_PIXEL_UNPACK_BUFFER. GL_INVALID_VALUE is generated if offset or size is negative, or if together they define a region of memory that extends beyond the buffer object's allocated data store. GL_INVALID_OPERATION is generated if the reserved buffer object name 0 is bound to target. GL_INVALID_OPERATION is generated if the buffer object being queried is mapped. SEE ALSO
glBindBuffer(), glBufferData(), glBufferSubData(), glMapBuffer(), glUnmapBuffer() COPYRIGHT
Copyright (C) 2005 Addison-Wesley. 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 GLGETBUFFERSUBDATA(3G)