2010 Khronos Group
glGetSamplerParameter 3G
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_LOD_BIAS`, `GL_TEXTURE_WRAP_S`, `GL_TEXTURE_WRAP_T`, `GL_TEXTURE_WRAP_R`, `GL_TEXTURE_BORDER_COLOR`, `GL_TEXTURE_COMPARE_MODE`, and `GL_TEXTURE_COMPARE_FUNC` 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_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).

`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.

## Notes

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

`glGetSamplerParameter` is available only if the GL version is 3.3 or higher.

## Errors

`GL_INVALID_VALUE` 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.

## See Also

glSamplerParameter, glGenSamplers, glDeleteSamplers, glSamplerParameter

## Copyright

Copyright 2010 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/.