glClearBufferData, glClearNamedBufferData — fill a buffer object's data store with a fixed value
void glClearBufferData(
|
GLenum target, |
| GLenum internalformat, | |
| GLenum format, | |
| GLenum type, | |
const void * data); |
void glClearNamedBufferData(
|
GLuint buffer, |
| GLenum internalformat, | |
| GLenum format, | |
| GLenum type, | |
const void *data); |
target
Specifies the target to which the buffer object is bound
for glClearBufferData, 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
glClearNamedBufferData.
internalformat
The internal format with which the data will be stored in the buffer object.
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.
glClearBufferData and
glClearNamedBufferData fill 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
internalformat, which must be one of the
following sized internal formats:
| Component | |||||||
|---|---|---|---|---|---|---|---|
| Sized Internal Format | Base Type | Components | Norm | 0 | 1 | 2 | 3 |
GL_R8
|
ubyte | 1 | YES | R | 0 | 0 | 1 |
GL_R16
|
ushort | 1 | YES | R | 0 | 0 | 1 |
GL_R16F
|
half | 1 | NO | R | 0 | 0 | 1 |
GL_R32F
|
float | 1 | NO | R | 0 | 0 | 1 |
GL_R8I
|
byte | 1 | NO | R | 0 | 0 | 1 |
GL_R16I
|
short | 1 | NO | R | 0 | 0 | 1 |
GL_R32I
|
int | 1 | NO | R | 0 | 0 | 1 |
GL_R8UI
|
ubyte | 1 | NO | R | 0 | 0 | 1 |
GL_R16UI
|
ushort | 1 | NO | R | 0 | 0 | 1 |
GL_R32UI
|
uint | 1 | NO | R | 0 | 0 | 1 |
GL_RG8
|
ubyte | 2 | YES | R | G | 0 | 1 |
GL_RG16
|
ushort | 2 | YES | R | G | 0 | 1 |
GL_RG16F
|
half | 2 | NO | R | G | 0 | 1 |
GL_RG32F
|
float | 2 | NO | R | G | 0 | 1 |
GL_RG8I
|
byte | 2 | NO | R | G | 0 | 1 |
GL_RG16I
|
short | 2 | NO | R | G | 0 | 1 |
GL_RG32I
|
int | 2 | NO | R | G | 0 | 1 |
GL_RG8UI
|
ubyte | 2 | NO | R | G | 0 | 1 |
GL_RG16UI
|
ushort | 2 | NO | R | G | 0 | 1 |
GL_RG32UI
|
uint | 2 | NO | R | G | 0 | 1 |
GL_RGB32F
|
float | 3 | NO | R | G | B | 1 |
GL_RGB32I
|
int | 3 | NO | R | G | B | 1 |
GL_RGB32UI
|
uint | 3 | NO | R | G | B | 1 |
GL_RGBA8
|
uint | 4 | YES | R | G | B | A |
GL_RGBA16
|
short | 4 | YES | R | G | B | A |
GL_RGBA16F
|
half | 4 | NO | R | G | B | A |
GL_RGBA32F
|
float | 4 | NO | R | G | B | A |
GL_RGBA8I
|
byte | 4 | NO | R | G | B | A |
GL_RGBA16I
|
short | 4 | NO | R | G | B | A |
GL_RGBA32I
|
int | 4 | NO | R | G | B | A |
GL_RGBA8UI
|
ubyte | 4 | NO | R | G | B | A |
GL_RGBA16UI
|
ushort | 4 | NO | R | G | B | A |
GL_RGBA32UI
|
uint | 4 | NO | R | G | B | A |
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.
GL_INVALID_ENUM is generated by
glClearBufferData if
target is not one of the generic buffer
binding targets.
GL_INVALID_VALUE is generated by
glClearBufferData if no buffer is bound
target.
GL_INVALID_OPERATION is generated by
glClearNamedBufferData if
buffer is not the name of an existing
buffer object.
GL_INVALID_ENUM is generated if
internalformat is not one of the valid
sized internal formats listed in the table above.
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
glMapBufferRange
access flags.
GL_INVALID_VALUE is generated if
format is not a valid format, or
type is not a valid type.
| 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 |
glClearBufferData
|
- | - | - | - | - | - | - | - | - | ✔ | ✔ | ✔ |
glClearNamedBufferData
|
- | - | - | - | - | - | - | - | - | - | - | ✔ |
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. http://opencontent.org/openpub/.