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GLGETTEXPARAMETER() GLGETTEXPARAMETER()

glGetTexParameterfv, glGetTexParameteriv - return texture parameter values

void glGetTexParameterfv( GLenum target,
	GLenum pname,
	GLfloat *params )
void glGetTexParameteriv( GLenum target,
	GLenum pname,
	GLint *params )

target
Specifies the symbolic name of the target texture. GL_TEXTURE_1D and GL_TEXTURE_2D are accepted.
pname
Specifies the symbolic name of a texture parameter. GL_TEXTURE_MAG_FILTER, GL_TEXTURE_MIN_FILTER, GL_TEXTURE_WRAP_S, GL_TEXTURE_WRAP_T, GL_TEXTURE_BORDER_COLOR, GL_TEXTURE_PRIORITY, and GL_TEXTURE_RESIDENT are accepted.
params
Returns the texture parameters.

glGetTexParameter returns in params the value or values of the texture parameter specified as pname. target defines the target texture, either GL_TEXTURE_1D or GL_TEXTURE_2D, to specify one- or two-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_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_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.

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

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

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.

glAreTexturesResident, glPrioritizeTextures, glTexParameter

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