glGetSamplerParameter - OpenGL ES 3.2 Reference Pages

## Name

glGetSamplerParameter — return sampler parameter values

## C Specification

`void glGetSamplerParameterfv(` | GLuint sampler,
| GLenum pname,
| GLfloat * params`)`;

`void glGetSamplerParameteriv(` | GLuint sampler,
| GLenum pname,
| GLint * params`)`;

`void glGetSamplerParameterIiv(` | GLuint sampler,
| GLenum pname,
| GLint * params`)`;

`void glGetSamplerParameterIuiv(` | GLuint sampler,
| GLenum pname,
| GLuint * params`)`;

## Parameters

`sampler`

  Specifies name of the sampler object from which to retrieve parameters.

`pname`

  Specifies the symbolic name of a sampler parameter. `GL_TEXTURE_MAG_FILTER`, `GL_TEXTURE_MIN_FILTER`, `GL_TEXTURE_MIN_LOD`, `GL_TEXTURE_MAX_LOD`, `GL_TEXTURE_WRAP_S`, `GL_TEXTURE_WRAP_T`, `GL_TEXTURE_WRAP_R`, `GL_TEXTURE_COMPARE_MODE`, `GL_TEXTURE_COMPARE_FUNC`, and `GL_TEXTURE_BORDER_COLOR` are accepted.

`params`

  Returns the sampler parameters.

## Description

`glGetSamplerParameter`* returns in `params` the value or values of the sampler parameter specified as `pname`. `sampler` defines the target sampler, and must be the name of an existing sampler object, returned from a previous call to glGenSamplers. `pname` accepts the same symbols as glSamplerParameter*, with the same interpretations:

`GL_TEXTURE_MAG_FILTER`

  Returns the single-valued texture magnification filter, a symbolic constant. The initial value is `GL_LINEAR`.

`GL_TEXTURE_MIN_FILTER`

  Returns the single-valued texture minification filter, a symbolic constant. The initial value is `GL_NEAREST_MIPMAP_LINEAR`.

`GL_TEXTURE_MIN_LOD`

  Returns the single-valued texture minimum level-of-detail value. The initial value is -1000 .

`GL_TEXTURE_MAX_LOD`

  Returns the single-valued texture maximum level-of-detail value. The initial value is 1000.

`GL_TEXTURE_WRAP_S`

  Returns the single-valued wrapping function for texture coordinate s, a symbolic constant. The initial value is `GL_REPEAT`.

`GL_TEXTURE_WRAP_T`

  Returns the single-valued wrapping function for texture coordinate t, a symbolic constant. The initial value is `GL_REPEAT`.

`GL_TEXTURE_WRAP_R`

  Returns the single-valued wrapping function for texture coordinate r, a symbolic constant. The initial value is `GL_REPEAT`.

`GL_TEXTURE_COMPARE_MODE`

  Returns a single-valued texture comparison mode, a symbolic constant. The initial value is `GL_NONE`. See glSamplerParameter.

`GL_TEXTURE_COMPARE_FUNC`

  Returns a single-valued texture comparison function, a symbolic constant. The initial value is `GL_LEQUAL`. See glSamplerParameter.

`GL_TEXTURE_BORDER_COLOR`

  Returns four integer or floating-point numbers that comprise the RGBA color of the texture border. Floating-point values are returned in the range 0 1 . Integer values are returned as a linear mapping of the internal floating-point representation such that 1.0 maps to the most positive representable integer and -1.0 maps to the most negative representable integer. The initial value is (0, 0, 0, 0).

## Notes

If an error is generated, no change is made to the contents of `params`.

## Errors

`GL_INVALID_OPERATION` is generated if `sampler` is not the name of a sampler object returned from a previous call to glGenSamplers.

`GL_INVALID_ENUM` is generated if `pname` is not an accepted value.

## API Version Support

| OpenGL ES API Version
--- | ---
Function Name | 2.0 | 3.0 | 3.1 | 3.2
`glGetSamplerParameterfv` | - | ✔ | ✔ | ✔
`glGetSamplerParameteriv` | - | ✔ | ✔ | ✔
`glGetSamplerParameterIiv` | - | - | - | ✔
`glGetSamplerParameterIuiv` | - | - | - | ✔

## See Also

glSamplerParameter, glGenSamplers, glDeleteSamplers, glSamplerParameter

## Copyright

Copyright © 2010-2015 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/.