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1ARB_texture_float:
2
3    Silicon Graphics, Inc. owns US Patent #6,650,327, issued November 18,
4    2003 [1].
5
6    SGI believes this patent contains necessary IP for graphics systems
7    implementing floating point rasterization and floating point
8    framebuffer capabilities described in ARB_texture_float extension, and
9    will discuss licensing on RAND terms, on an individual basis with
10    companies wishing to use this IP in the context of conformant OpenGL
11    implementations [2].
12
13    The source code to implement ARB_texture_float extension is included
14    and can be toggled on at compile time, for those who purchased a
15    license from SGI, or are in a country where the patent does not apply,
16    etc.
17
18    The software is provided "as is", without warranty of any kind, express
19    or implied, including but not limited to the warranties of
20    merchantability, fitness for a particular purpose and noninfringement.
21    In no event shall the authors or copyright holders be liable for any
22    claim, damages or other liability, whether in an action of contract,
23    tort or otherwise, arising from, out of or in connection with the
24    software or the use or other dealings in the software.
25
26    You should contact a lawyer or SGI's legal department if you want to
27    enable this extension.
28
29
30[1] https://www.google.com/patents/about?id=mIIOAAAAEBAJ&dq=6650327
31[2] https://www.opengl.org/registry/specs/ARB/texture_float.txt
32