GLTEXTUREBARRIER - Online Linux Manual PageSection : 3G
Updated : 01/20/2022
Source : [FIXME: source]
Note : [FIXME: manual]

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NAMEglTextureBarrier − controls the ordering of reads and writes to rendered fragments across drawing commands

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C SPECIFICATIONvoid glTextureBarrier(void);

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DESCRIPTIONThe values of rendered fragments are undefined when a shader stage fetches texels and the same texels are written via fragment shader outputs, even if the reads and writes are not in the same drawing command​. To safely read the result of a written texel via a texel fetch in a subsequent drawing command, call glTextureBarrier between the two drawing commands to guarantee that writes have completed and caches have been invalidated before subsequent drawing commands are executed​.

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NOTESThe situation described above is referred to as a rendering feedback loop and is discussed in more detail in section 9​.3 of the OpenGL 4​.5 Specification​.

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ERRORSNone​.

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VERSION SUPPORT OpenGL Version Function / Feature Name 2​.0 none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'> 2​.1 3​.0 3​.1 3​.2 3​.3 4​.0 4​.1 4​.2 4​.3 4​.4 4​.5 glTextureBarrier − − − − − − − − − − − ✔

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SEE ALSOglMemoryBarrier()

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COPYRIGHTCopyright © 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/​.

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Copyright © 2014 Khronos Group
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