glClampColor - specify whether data read via glReadPixels() should be clamped

glGet() with argument GL_CLAMP_READ_COLOR.

voidglClampColor(GLenumtarget,GLenumclamp);

       Copyright © 2010-2014 Khronos Group

[FIXME: source]                                    11/18/2024                                   GLCLAMPCOLOR(3G)

glClampColor controls color clamping that is performed during glReadPixels().  target must be
       GL_CLAMP_READ_COLOR. If clamp is GL_TRUE, read color clamping is enabled; if clamp is GL_FALSE, read
       color clamping is disabled. If clamp is GL_FIXED_ONLY, read color clamping is enabled only if the
       selected read buffer has fixed point components and disabled otherwise.

GL_INVALID_ENUM is generated if target is not GL_CLAMP_READ_COLOR.

       GL_INVALID_ENUM is generated if clamp is not GL_TRUE or GL_FALSE.

       glClampColor - specify whether data read via glReadPixels() should be clamped

target
           Target for color clamping.  target must be GL_CLAMP_READ_COLOR.

       clamp
           Specifies whether to apply color clamping.  clamp must be GL_TRUE or GL_FALSE.

       ┌──────────────┬───────────────────────────────────────────────────────────────────────┐
       │              │                OpenGLVersion                                         │
       ├──────────────┼─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┤
       │ Function     │ 2.0 │ 2.1 │ 3.0 │ 3.1 │ 3.2 │ 3.3 │ 4.0 │ 4.1 │ 4.2 │ 4.3 │ 4.4 │ 4.5 │
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       │ Feature      │     │     │     │     │     │     │     │     │     │     │     │     │
       │ Name         │     │     │     │     │     │     │     │     │     │     │     │     │
       ├──────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
       │ glClampColor │  -  │  -  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │
       └──────────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘