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NAME

       glTexBufferRange, glTextureBufferRange - attach a range of a buffer object's data store to
       a buffer texture object

C SPECIFICATION

       void glTexBufferRange(GLenum target, GLenum internalFormat, GLuint buffer,
                             GLintptr offset, GLsizeiptr size);

       void glTextureBufferRange(GLuint texture, GLenum internalformat, GLuint buffer,
                                 GLintptr offset, GLsizei size);

PARAMETERS

       target
           Specifies the target to which the texture object is bound for glTexBufferRange. Must
           be GL_TEXTURE_BUFFER.

       texture
           Specifies the texture object name for glTextureBufferRange.

       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.

DESCRIPTION

       glTexBufferRange and glTextureBufferRange attach a range of the data store of a specified
       buffer object to a specified texture object, and specify the storage format for the
       texture image found found in the buffer object. The texture object must be a buffer
       texture.

       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.

       The start and size of the range are specified by offset and size respectively, 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 must 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   │
       ├────────────┼───────────┼────────────┼──────┼───┬───┬───┬───┤
       │SizedBase TypeComponentsNorm0123 │
       │Internal    │           │            │      │   │   │   │   │
       │Format      │           │            │      │   │   │   │   │
       ├────────────┼───────────┼────────────┼──────┼───┼───┼───┼───┤
       │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 range of a buffer object is attached to a buffer texture, the specified range of
       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 $$ \left\lfloor { size \over { components
       \times sizeof(base\_type) } } \right\rfloor $$ where $components$ 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 value of 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 by glTexBufferRange if target is not GL_TEXTURE_BUFFER.

       GL_INVALID_OPERATION is generated by glTextureBufferRange if texture is not the name of an
       existing texture object.

       GL_INVALID_ENUM is generated by glTextureBufferRange if the effective target of texture is
       not GL_TEXTURE_BUFFER.

       GL_INVALID_ENUM is generated if internalformat is not one of the sized internal formats
       described above.

       GL_INVALID_OPERATION is generated if buffer is not zero and is not the name of an existing
       buffer object.

       GL_INVALID_VALUE is generated if offset is negative, if size is less than or equal to
       zero, or 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.

ASSOCIATED GETS

       glGet() with argument GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT

       glGetTexLevelParameter() with arguments GL_TEXTURE_BUFFER_OFFSET or
       GL_TEXTURE_BUFFER_SIZE.

VERSION SUPPORT

       ┌─────────────────────┬───────────────────────────────────────────────────────────────────────┐
       │                     │                OpenGL Version                                         │
       ├─────────────────────┼─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┤
       │Function2.02.13.03.13.23.34.04.14.24.34.44.5 │
       │/                    │     │     │     │     │     │     │     │     │     │     │     │     │
       │Feature              │     │     │     │     │     │     │     │     │     │     │     │     │
       │Name                 │     │     │     │     │     │     │     │     │     │     │     │     │
       ├─────────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
       │glTexBufferRange     │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  ✔  │  ✔  │  ✔  │
       ├─────────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
       │glTextureBufferRange │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  ✔  │
       └─────────────────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘

SEE ALSO

       glTexBuffer().

COPYRIGHT

       Copyright © 2012-2014 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 © 2012-2014 Khronos Group

[FIXME: source]                             01/03/2018                       GLTEXBUFFERRANGE(3G)