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NAME
glBufferSubData, glNamedBufferSubData - updates a subset of a buffer object's data store
C SPECIFICATION
void glBufferSubData(GLenum target, GLintptr offset, GLsizeiptr size,
const GLvoid * data);
void glNamedBufferSubData(GLuint buffer, GLintptr offset, GLsizei size, const void *data);
PARAMETERS
target
Specifies the target to which the buffer object is bound for glBufferSubData, which
must be one of the buffer binding targets in the following table:
┌─────────────────────────────┬────────────────────────────────┐
│Buffer Binding Target │ Purpose │
├─────────────────────────────┼────────────────────────────────┤
│GL_ARRAY_BUFFER │ Vertex attributes │
├─────────────────────────────┼────────────────────────────────┤
│GL_ATOMIC_COUNTER_BUFFER │ Atomic counter storage │
├─────────────────────────────┼────────────────────────────────┤
│GL_COPY_READ_BUFFER │ Buffer copy source │
├─────────────────────────────┼────────────────────────────────┤
│GL_COPY_WRITE_BUFFER │ Buffer copy destination │
├─────────────────────────────┼────────────────────────────────┤
│GL_DISPATCH_INDIRECT_BUFFER │ Indirect compute dispatch │
│ │ commands │
├─────────────────────────────┼────────────────────────────────┤
│GL_DRAW_INDIRECT_BUFFER │ Indirect command arguments │
├─────────────────────────────┼────────────────────────────────┤
│GL_ELEMENT_ARRAY_BUFFER │ Vertex array indices │
├─────────────────────────────┼────────────────────────────────┤
│GL_PIXEL_PACK_BUFFER │ Pixel read target │
├─────────────────────────────┼────────────────────────────────┤
│GL_PIXEL_UNPACK_BUFFER │ Texture data source │
├─────────────────────────────┼────────────────────────────────┤
│GL_QUERY_BUFFER │ Query result buffer │
├─────────────────────────────┼────────────────────────────────┤
│GL_SHADER_STORAGE_BUFFER │ Read-write storage for shaders │
├─────────────────────────────┼────────────────────────────────┤
│GL_TEXTURE_BUFFER │ Texture data buffer │
├─────────────────────────────┼────────────────────────────────┤
│GL_TRANSFORM_FEEDBACK_BUFFER │ Transform feedback buffer │
├─────────────────────────────┼────────────────────────────────┤
│GL_UNIFORM_BUFFER │ Uniform block storage │
└─────────────────────────────┴────────────────────────────────┘
buffer
Specifies the name of the buffer object for glNamedBufferSubData.
offset
Specifies the offset into the buffer object's data store where data replacement will
begin, measured in bytes.
size
Specifies the size in bytes of the data store region being replaced.
data
Specifies a pointer to the new data that will be copied into the data store.
DESCRIPTION
glBufferSubData and glNamedBufferSubData redefine some or all of the data store for the
specified buffer object. Data starting at byte offset offset and extending for size bytes
is copied to the data store from the memory pointed to by data. offset and size must
define a range lying entirely within the buffer object's data store.
NOTES
When replacing the entire data store, consider using glBufferSubData rather than
completely recreating the data store with glBufferData. This avoids the cost of
reallocating the data store.
Consider using multiple buffer objects to avoid stalling the rendering pipeline during
data store updates. If any rendering in the pipeline makes reference to data in the buffer
object being updated by glBufferSubData, especially from the specific region being
updated, that rendering must drain from the pipeline before the data store can be updated.
Clients must align data elements consistent with the requirements of the client platform,
with an additional base-level requirement that an offset within a buffer to a datum
comprising $N$ bytes be a multiple of $N$.
The GL_ATOMIC_COUNTER_BUFFER target is available only if the GL version is 4.2 or greater.
The GL_DISPATCH_INDIRECT_BUFFER and GL_SHADER_STORAGE_BUFFER targets are available only if
the GL version is 4.3 or greater.
The GL_QUERY_BUFFER target is available only if the GL version is 4.4 or greater.
ERRORS
GL_INVALID_ENUM is generated by glBufferSubData if target is not one of the accepted
buffer targets.
GL_INVALID_OPERATION is generated by glBufferSubData if zero is bound to target.
GL_INVALID_OPERATION is generated by glNamedBufferSubData if buffer is not the name of an
existing buffer object.
GL_INVALID_VALUE is generated if offset or size is negative, or if $offset + size$ is
greater than the value of GL_BUFFER_SIZE for the specified buffer object.
GL_INVALID_OPERATION is generated if any part of the specified range of the buffer object
is mapped with glMapBufferRange() or glMapBuffer(), unless it was mapped with the
GL_MAP_PERSISTENT_BIT bit set in the glMapBufferRangeaccess flags.
GL_INVALID_OPERATION is generated if the value of the GL_BUFFER_IMMUTABLE_STORAGE flag of
the buffer object is GL_TRUE and the value of GL_BUFFER_STORAGE_FLAGS for the buffer
object does not have the GL_DYNAMIC_STORAGE_BIT bit set.
ASSOCIATED GETS
glGetBufferSubData()
VERSION SUPPORT
┌─────────────────────┬───────────────────────────────────────────────────────────────────────┐
│ │ OpenGL Version │
├─────────────────────┼─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┤
│Function │ 2.0 │ 2.1 │ 3.0 │ 3.1 │ 3.2 │ 3.3 │ 4.0 │ 4.1 │ 4.2 │ 4.3 │ 4.4 │ 4.5 │
│/ │ │ │ │ │ │ │ │ │ │ │ │ │
│Feature │ │ │ │ │ │ │ │ │ │ │ │ │
│Name │ │ │ │ │ │ │ │ │ │ │ │ │
├─────────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
│glBufferSubData │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │
├─────────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
│glNamedBufferSubData │ - │ - │ - │ - │ - │ - │ - │ - │ - │ - │ - │ ✔ │
└─────────────────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘
SEE ALSO
glBindBuffer(), glBufferData(), glMapBuffer(), glMapBufferRange(), glUnmapBuffer()
COPYRIGHT
Copyright © 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/.
COPYRIGHT
Copyright © 2005 Sams Publishing
Copyright © 2010-2014 Khronos Group
[FIXME: source] 07/22/2015 GLBUFFERSUBDATA(3G)