GLGETTEXPARAMETER(3G) GLGETTEXPARAMETER(3G)
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 )
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 sym-
bols 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)
GLGETTEXPARAMETER(3G)