glGetBufferPointerv, glGetNamedBufferPointerv — return the pointer to a mapped buffer object's data store
void glGetBufferPointerv(
|
GLenum target, |
GLenum pname, | |
void ** params) ; |
void glGetNamedBufferPointerv(
|
GLuint buffer, |
GLenum pname, | |
void **params) ; |
target
Specifies the target to which the buffer object is bound
for glGetBufferPointerv
, 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
glGetNamedBufferPointerv
.
pname
Specifies the name of the pointer to be returned. Must
be GL_BUFFER_MAP_POINTER
.
params
Returns the pointer value specified by
pname
.
glGetBufferPointerv
and
glGetNamedBufferPointerv
return the buffer
pointer pname
, which must be
GL_BUFFER_MAP_POINTER
. The single buffer
map pointer is returned in params
. A
NULL
pointer is returned if the buffer
object's data store is not currently mapped; or if the
requesting context did not map the buffer object's data store,
and the implementation is unable to support mappings on multiple
clients.
If an error is generated, no change is made to the contents of
params
.
The initial value for the pointer is NULL
.
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.
GL_INVALID_ENUM
is generated if by
glGetBufferPointerv
if
target
is not one of the accepted buffer
targets, or if pname
is not
GL_BUFFER_MAP_POINTER
.
GL_INVALID_OPERATION
is generated by
glGetBufferPointerv
if zero is bound to
target
.
GL_INVALID_OPERATION
is generated by
glGetNamedBufferPointerv
if
buffer
is not the name of an existing
buffer object.
OpenGL Version | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Function / Feature Name | 2.0 | 2.1 | 3.0 | 3.1 | 3.2 | 3.3 | 4.0 | 4.1 | 4.2 | 4.3 | 4.4 | 4.5 |
glGetBufferPointerv
|
✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
glGetNamedBufferPointerv
|
- | - | - | - | - | - | - | - | - | - | - | ✔ |
Copyright © 2005 Addison-Wesley. Copyright © 2011-2014 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. https://opencontent.org/openpub/.