GLCLEARBUFFERDATA(3G) OpenGL Manual GLCLEARBUFFERDATA(3G)NAME
glClearBufferData - fill a buffer object's data store with a fixed value
C SPECIFICATION
void glClearBufferData(GLenum target, GLenum internalformat, GLenum format, GLenum type, const void * data);
PARAMETERS
target
Specify the target of the operation. target must be one of the global buffer binding targets.
internalformat
The internal format with which the data will be stored in the buffer object.
size
The size, in basic machine units of the range of the data store to fill.
format
The format of the data in memory addressed by data.
type
The type of the data in memory addressed by data.
data
The address of a memory location storing the data to be replicated into the buffer's data store.
DESCRIPTION
glClearBufferData fills the entirety of a buffer object's data store with data from client memory. Data, initially supplied in a format
specified by format in data type type is read from the memory address given by data and converted into the internal representation given by
internalforamt. This converted data is then replicated throughout the buffer object's data store.
If data is NULL, then the buffer's data store is filled with zeros.
ERRORS
GL_INVALID_ENUM is generated if target not one of the generic buffer binding targets.
GL_INVALID_VALUE is generated if no buffer is bound to target.
GL_INVALID_ENUM is generated if internalformat is not a sized internal format.
GL_INVALID_OPERATION is generated if any part of the buffer's data store is mapped with glMapBufferRange() or glMapBuffer.()
SEE ALSO
glClearBufferSubData().
COPYRIGHT
Copyright (C) 2011-2012 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/.
AUTHORS
opengl.org
opengl.org 06/10/2014 GLCLEARBUFFERDATA(3G)
Check Out this Related Man Page
GLGETBUFFERSUBDATA(3G) OpenGL Manual 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_ATOMIC_COUNTER_BUFFER, GL_COPY_READ_BUFFER,
GL_COPY_WRITE_BUFFER, GL_DRAW_INDIRECT_BUFFER, GL_DISPATCH_INDIRECT_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.
The GL_ATOMIC_COUNTER_BUFER target is available only if the GL version is 4.2 or greater.
The GL_DISPATCH_INDIRECT_BUFFER target is available only if the GL version is 4.3 or greater.
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/.
AUTHORS
opengl.org
opengl.org 06/10/2014 GLGETBUFFERSUBDATA(3G)