glTexBufferRange — bind a range of a buffer's data store to a buffer texture
void glTexBufferRange( | GLenum target, |
GLenum internalFormat, | |
GLuint buffer, | |
GLintptr offset, | |
GLsizeiptr size) ; |
target
Specifies the target of the operation and must be GL_TEXTURE_BUFFER
.
internalFormat
Specifies the internal format of the data in the store belonging to buffer
.
buffer
Specifies the name of the buffer object whose storage to attach to the active buffer texture.
offset
Specifies the offset of the start of the range of the buffer's data store to attach.
size
Specifies the size of the range of the buffer's data store to attach.
glTexBufferRange
attaches the a range of the data store of the buffer object named buffer
to the active
buffer texture, and specifies the internal format for the texel array found in the attached buffer object. If buffer
is zero, any buffer object attached to the buffer texture is detached and no new buffer object is attached. If buffer
is non-zero, it must be the name of an existing buffer object. target
must be GL_TEXTURE_BUFFER
.
The start of the range is specified by offset
and the size of the range is specified by size
,
both measured in basic machine units. offset
must be greater than or equal to zero, size
must be greater
than zero, and the sum of offset
and size
not exceed the value
of GL_BUFFER_SIZE
for buffer
. Furthermore, offset
must be
an integer multiple of the value of GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT
.
internalformat
specifies the storage format, and 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 |
GL_INVALID_ENUM
is generated if target
is not
GL_TEXTURE_BUFFER
.
GL_INVALID_VALUE
is generated if offset
is less than zero.
GL_INVALID_VALUE
is generated if size
is less than or equal to zero.
GL_INVALID_VALUE
is generated if offset
+ size
is
greater than the value of GL_BUFFER_SIZE
for buffer
.
GL_INVALID_VALUE
is generated if offset
is not
an integer multiple of the value of GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT
.
glGet with argument GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT
glGetTexLevelParameter with arguments GL_TEXTURE_BUFFER_OFFSET
or GL_TEXTURE_BUFFER_SIZE
.
Copyright © 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/.