glPatchParameter - specifies the parameters for patch primitives

voidglPatchParameteri(GLenumpname,GLintvalue);voidglPatchParameterfv(GLenumpname,constGLfloat*values);

       Copyright © 2010-2014 Khronos Group.

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

glPatchParameter specifies the parameters that will be used for patch primitives.  pname specifies the
       parameter to modify and must be either GL_PATCH_VERTICES, GL_PATCH_DEFAULT_OUTER_LEVEL or
       GL_PATCH_DEFAULT_INNER_LEVEL. For glPatchParameteri, value specifies the new value for the parameter
       specified by pname. For glPatchParameterfv, values specifies the address of an array containing the new
       values for the parameter specified by pname.

       When pname is GL_PATCH_VERTICES, value specifies the number of vertices that will be used to make up a
       single patch primitive. Patch primitives are consumed by the tessellation control shader (if present) and
       subsequently used for tessellation. When primitives are specified using glDrawArrays() or a similar
       function, each patch will be made from parameter control points, each represented by a vertex taken from
       the enabeld vertex arrays.  parameter must be greater than zero, and less than or equal to the value of
       GL_MAX_PATCH_VERTICES.

       When pname is GL_PATCH_DEFAULT_OUTER_LEVEL or GL_PATCH_DEFAULT_INNER_LEVEL, values contains the address
       of an array contiaining the default outer or inner tessellation levels, respectively, to be used when no
       tessellation control shader is present.

GL_INVALID_ENUM is generated if pname is not an accepted value.

       GL_INVALID_VALUE is generated if pname is GL_PATCH_VERTICES and value is less than or equal to zero, or
       greater than the value of GL_MAX_PATCH_VERTICES.

       glPatchParameter - specifies the parameters for patch primitives

pname
           Specifies the name of the parameter to set. The symbolc constants GL_PATCH_VERTICES,
           GL_PATCH_DEFAULT_OUTER_LEVEL, and GL_PATCH_DEFAULT_INNER_LEVEL are accepted.

       value
           Specifies the new value for the parameter given by pname.

       values
           Specifies the address of an array containing the new values for the parameter given by pname.

glDrawArrays(), glDrawArraysInstanced(), glDrawElements(), glDrawRangeElements(),

       ┌────────────────────┬───────────────────────────────────────────────────────────────────────┐
       │                    │                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 │
       │ /                  │     │     │     │     │     │     │     │     │     │     │     │     │
       │ Feature            │     │     │     │     │     │     │     │     │     │     │     │     │
       │ Name               │     │     │     │     │     │     │     │     │     │     │     │     │
       ├────────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
       │ glPatchParameterfv │  -  │  -  │  -  │  -  │  -  │  -  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │
       ├────────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
       │ glPatchParameteri  │  -  │  -  │  -  │  -  │  -  │  -  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │
       └────────────────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘