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glGetTexParameterfv, glGetTexParameteriv - return texture parameter
values
void glGetTexParameterfv( GLenum target,
GLenum pname,
GLfloat *params )
void glGetTexParameteriv( GLenum target,
GLenum pname,
GLint *params )
eqn not supported
- 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.
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.
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.
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(3G)
, glPrioritizeTextures(3G)
, glTexParameter(3G)
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