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# docs.GL

OpenGL 4
OpenGL 3
OpenGL 2
OpenGL ES 3
OpenGL ES 2

# glGetTexParameter

## Name

glGetTexParameter — return texture parameter values

## C Specification

`void glGetTexParameterfv(` | GLenum | target,
| GLenum | pname,
| GLfloat * | params`)`;

`void glGetTexParameteriv(` | GLenum | target,
| GLenum | pname,
| GLint * | params`)`;

`void glGetTexParameterIiv(` | GLenum | target,
| GLenum | pname,
| GLint * | params`)`;

`void glGetTexParameterIuiv(` | GLenum | target,
| GLenum | pname,
| GLuint * | params`)`;

## Parameters

`target`

  Specifies the symbolic name of the target texture. `GL_TEXTURE_1D`, `GL_TEXTURE_2D`, `GL_TEXTURE_1D_ARRAY`, `GL_TEXTURE_2D_ARRAY`, `GL_TEXTURE_3D`, `GL_TEXTURE_RECTANGLE`, and `GL_TEXTURE_CUBE_MAP` are accepted.

`pname`

  Specifies the symbolic name of a texture parameter. `GL_TEXTURE_BASE_LEVEL`, `GL_TEXTURE_BORDER_COLOR`, `GL_TEXTURE_COMPARE_MODE`, `GL_TEXTURE_COMPARE_FUNC`, `GL_TEXTURE_LOD_BIAS`, `GL_TEXTURE_MAG_FILTER`, `GL_TEXTURE_MAX_LEVEL`, `GL_TEXTURE_MAX_LOD`, `GL_TEXTURE_MIN_FILTER`, `GL_TEXTURE_MIN_LOD`, `GL_TEXTURE_SWIZZLE_R`, `GL_TEXTURE_SWIZZLE_G`, `GL_TEXTURE_SWIZZLE_B`, `GL_TEXTURE_SWIZZLE_A`, `GL_TEXTURE_SWIZZLE_RGBA`, `GL_TEXTURE_WRAP_S`, `GL_TEXTURE_WRAP_T`, and `GL_TEXTURE_WRAP_R` are accepted.

`params`

  Returns the texture parameters.

## Description

`glGetTexParameter` returns in `params` the value or values of the texture parameter specified as `pname`. `target` defines the target texture. `GL_TEXTURE_1D`, `GL_TEXTURE_2D`, `GL_TEXTURE_3D`, `GL_TEXTURE_1D_ARRAY`, `GL_TEXTURE_2D_ARRAY`, `GL_TEXTURE_RECTANGLE`, and `GL_TEXTURE_CUBE_MAP` specify one-, two-, or three-dimensional, one-dimensional array, two-dimensional array, rectangle or cube-mapped texturing, respectively. `pname` accepts the same symbols as glTexParameter, 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_BASE_LEVEL`

  Returns the single-valued base texture mipmap level. The initial value is 0.

`GL_TEXTURE_MAX_LEVEL`

  Returns the single-valued maximum texture mipmap array level. The initial value is 1000.

`GL_TEXTURE_SWIZZLE_R`

  Returns the red component swizzle. The initial value is `GL_RED`.

`GL_TEXTURE_SWIZZLE_G`

  Returns the green component swizzle. The initial value is `GL_GREEN`.

`GL_TEXTURE_SWIZZLE_B`

  Returns the blue component swizzle. The initial value is `GL_BLUE`.

`GL_TEXTURE_SWIZZLE_A`

  Returns the alpha component swizzle. The initial value is `GL_ALPHA`.

`GL_TEXTURE_SWIZZLE_RGBA`

  Returns the component swizzle for all channels in a single query.

`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 glTexParameter.

`GL_TEXTURE_COMPARE_FUNC`

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

## Notes

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

## Errors

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

## See Also

glTexParameter

## Copyright

Copyright © 1991-2006 Silicon Graphics, Inc. Copyright © 2010 Khronos Group. This document is licensed under the SGI Free Software B License. For details, see https://web.archive.org/web/20171022161616/http://oss.sgi.com/projects/FreeB/.

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