GLGETTEXPARAMETER(3G) manual page

Table of Contents

## Name

glGetTexParameterfv, glGetTexParameteriv - return texture parameter

values

## C Specification

void glGetTexParameterfv( GLenum target,

        GLenum pname,
        GLfloat *params )

void glGetTexParameteriv( GLenum target,

        GLenum pname,
        GLint *params )

eqn not supported

## Parameters

target
  Specifies the symbolic name of the target texture. GL_TEXTURE_1D,GL_TEXTURE_2D, and GL_TEXTURE_3D are accepted.
pname
  Specifies the symbolic name of a texture parameter. GL_TEXTURE_MAG_FILTER, GL_TEXTURE_MIN_FILTER, GL_TEXTURE_MIN_LOD, GL_TEXTURE_MAX_LOD, GL_TEXTURE_BASE_LEVEL, GL_TEXTURE_MAX_LEVEL, GL_TEXTURE_WRAP_S, GL_TEXTURE_WRAP_T, GL_TEXTURE_WRAP_R, GL_TEXTURE_BORDER_COLOR, GL_TEXTURE_PRIORITY, and GL_TEXTURE_RESIDENT 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, either GL_TEXTURE_1D, GL_TEXTURE_2D, or GL_TEXTURE_3D to specify one-, two-, or three-dimensional texturing. 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_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_PRIORITY
  Returns the residence priority of the target texture (or the named texture bound to it). The initial value is 1. See glPrioritizeTextures.
GL_TEXTURE_RESIDENT
  Returns the residence status of the target texture. If the value returned in params is GL_TRUE, the texture is resident in texture memory. See glAreTexturesResident.

## Notes

GL_TEXTURE_PRIORITY and GL_TEXTURE_RESIDENT are available only if the GL version is 1.1 or greater.

GL_TEXTURE_3D, GL_TEXTURE_MIN_LOD, GL_TEXTURE_MAX_LOD, GL_TEXTURE_BASE_LEVEL, GL_TEXTURE_MAX_LEVEL, and GL_TEXTURE_WRAP_R are available only if the GL version is 1.2 or greater.

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.

GL_INVALID_OPERATION is generated if glGetTexParameter is executed between the execution of glBegin and the corresponding execution of glEnd.

## See Also

glAreTexturesResident(3G) , glPrioritizeTextures(3G) , glTexParameter(3G)

Table of Contents

- Name
- C Specification
- Parameters
- Description
- Notes
- Errors
- See Also