1991-2006 Silicon Graphics, Inc.
glGetTexParameter 3G
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`, `GL_TEXTURE_CUBE_MAP`, and `GL_TEXTURE_CUBE_MAP_ARRAY` are accepted.

pname

  Specifies the symbolic name of a texture parameter. `GL_DEPTH_STENCIL_TEXTURE_MODE`, `GL_TEXTURE_BASE_LEVEL`, `GL_TEXTURE_BORDER_COLOR`, `GL_TEXTURE_COMPARE_MODE`, `GL_TEXTURE_COMPARE_FUNC`, `GL_TEXTURE_IMMUTABLE_FORMAT`, `GL_TEXTURE_IMMUTABLE_LEVELS`, `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_VIEW_MIN_LAYER`, `GL_TEXTURE_VIEW_MIN_LEVEL`, `GL_TEXTURE_VIEW_NUM_LAYERS`, `GL_TEXTURE_VIEW_NUM_LEVELS`, `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`, `GL_TEXTURE_CUBE_MAP`, `GL_TEXTURE_CUBE_MAP_ARRAY` specify one-, two-, or three-dimensional, one-dimensional array, two-dimensional array, rectangle, cube-mapped or cube-mapped array texturing, respectively. pname accepts the same symbols as glTexParameter, with the same interpretations:

`GL_DEPTH_STENCIL_TEXTURE_MODE`

  Returns the single-value depth stencil texture mode, a symbolic constant. The initial value is `GL_DEPTH_COMPONENT`.

`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.

`GL_TEXTURE_VIEW_MIN_LEVEL`

  Returns a single-valued base level of a texture view relative to its parent. The initial value is 0. See glTextureView.

`GL_TEXTURE_VIEW_NUM_LEVELS`

  Returns a single-valued number of levels of detail of a texture view. See glTextureView.

`GL_TEXTURE_VIEW_MIN_LAYER`

  Returns a single-valued first level of a texture array view relative to its parent. See glTextureView.

`GL_TEXTURE_VIEW_NUM_LAYERS`

  Returns a single-valued number of layers in a texture array view. See glTextureView.

`GL_TEXTURE_IMMUTABLE_LEVELS`

  Returns a single-valued number of immutable texture levels in a texture view. See glTextureView.

In addition to the parameters that may be set with glTexParameter, `glGetTexParameter` accepts the following read-only parameters:

`GL_TEXTURE_IMMUTABLE_FORMAT`

  Returns non-zero if the texture has an immutable format. Textures become immutable if their storage is specified with glTexStorage1D, glTexStorage2D or glTexStorage3D. The initial value is `GL_FALSE`.

## Notes

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

`GL_DEPTH_STENCIL_TEXTURE_MODE`, `GL_TEXTURE_VIEW_MIN_LEVEL`, `GL_TEXTURE_VIEW_NUM_LEVELS`, `GL_TEXTURE_VIEW_MIN_LAYER`, `GL_TEXTURE_VIEW_NUM_LAYERS` and `GL_TEXTURE_IMMUTABLE_LEVELS` are available only if the GL version is 4.3 or greater.

## Errors

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

## See Also

glTexParameter, glTexStorage1D, glTexStorage2D, glTexStorage3D, glTextureView

## Copyright

Copyright 1991-2006 Silicon Graphics, Inc. Copyright 2010-2012 Khronos Group. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.