table of contents
| GLTEXBUFFER(3G) | OpenGL Manual | GLTEXBUFFER(3G) |
NAME¶
glTexBuffer - attach the storage for a buffer object to the active buffer texture
C SPECIFICATION¶
void glTexBuffer(GLenum target, GLenum internalFormat, Gluintbuffer);
PARAMETERS¶
target
internalFormat
buffer
DESCRIPTION¶
glTexBuffer attaches the storage for 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. 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 |
When a buffer object is attached to a buffer texture, the buffer object's data store is taken as the texture's texel array. The number of texels in the buffer texture's texel array is given by
buffer_size
components × sizeof(base_type)
.PP where buffer_size is the size of the buffer object, in basic
machine units and components and base type are the element count and base
data type for elements, as specified in the table above. The number of
texels in the texel array is then clamped to the implementation-dependent
limit GL_MAX_TEXTURE_BUFFER_SIZE. When a buffer texture is accessed
in a shader, the results of a texel fetch are undefined if the specified
texel coordinate is negative, or greater than or equal to the clamped number
of texels in the texel array.
ERRORS¶
GL_INVALID_ENUM is generated if target is not GL_TEXTURE_BUFFER.
GL_INVALID_ENUM is generated if internalFormat is not one of the accepted tokens.
GL_INVALID_OPERATION is generated if buffer is not zero or the name of an existing buffer object.
NOTES¶
glTexBuffer is available only if the GL version is 3.1 or greater.
ASSOCIATED GETS¶
glGet() with argument GL_MAX_TEXTURE_BUFFER_SIZE
glGet() with argument GL_TEXTURE_BINDING_BUFFER
glGetTexLevelParameter() with argument GL_TEXTURE_BUFFER_DATA_STORE_BINDING
SEE ALSO¶
glGenBuffers(), glBindBuffer(), glBufferData(), glDeleteBuffers(), glGenTextures(), glBindTexture(), glDeleteTextures()
COPYRIGHT¶
Copyright © 2010 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
| 05/02/2014 | opengl.org |