GLGETTEXPARAMETER - Online Linux Manual Page

Section : 3G
NAME"glGetTexParameterfv, glGetTexParameteriv − return texture parameter values
C SPECIFICATIONvoid glGetTexParameterfv( GLenum target, GLenum pname, GLfloat *params )void glGetTexParameteriv( GLenum target, GLenum pname, GLint *params )
PARAMETERStarget  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.
DESCRIPTION­glGetTexParameter 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. .BP ­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.
NOTES­GL_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.
ERRORS­GL_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 ALSO­glAreTexturesResident(3G), ­glPrioritizeTextures(3G), ­glTexParameter(3G) 0
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