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W want to use GL_CLAMP_TO_BORDER in my GL ES 3 app. Based on documentation (https://www.khronos.org/registry/OpenGL-Refpages/es3/html/glTexParameter.xhtml), it seems to be supported, however, on iOS this #define is not present. Is it named differently? Maybe some extension?

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    \$\begingroup\$ @shallowThought - not relevant for ES. \$\endgroup\$ – Maximus Minimus Apr 30 '17 at 13:50
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GL_CLAMP_TO_BORDER became legal in GL ES 3.2 (link to specification), but may otherwise be available by one (or more) of the following extensions:

In the absence of one (or more) of these extensions, or if using an earlier version of GL ES, GL_CLAMP_TO_BORDER mode is not specified, and specifying a non-zero border value with your glTexImage parameters is documented to generate a GL_INVALID_VALUE error.

You are evidently working from an out-of-date header file, but you should also check that your hardware and driver are compatible.

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