NAME¶
glGetTexParameter - return texture parameter values
C SPECIFICATION¶
void glGetTexParameterfv(GLenum target,
GLenum pname,
GLfloat * params);
void glGetTexParameteriv(GLenum target,
GLenum pname,
GLint * params);
void
glGetTexParameterIiv(GLenum target,
GLenum pname,
GLint * params);
void
glGetTexParameterIuiv(GLenum target,
GLenum pname,
GLuint * params);
void
glGetTextureParameterfv(GLuint texture,
GLenum pname,
GLfloat *params);
void
glGetTextureParameteriv(GLuint texture,
GLenum pname,
GLint *params);
void
glGetTextureParameterIiv(GLuint texture,
GLenum pname,
GLint *params);
void
glGetTextureParameterIuiv(GLuint texture,
GLenum pname,
GLuint *params);
PARAMETERS¶
target
Specifies the target to which the texture is bound for
glGetTexParameterfv, glGetTexParameteriv,
glGetTexParameterIiv, and glGetTexParameterIuiv functions.
GL_TEXTURE_1D, GL_TEXTURE_1D_ARRAY, GL_TEXTURE_2D,
GL_TEXTURE_2D_ARRAY, GL_TEXTURE_2D_MULTISAMPLE,
GL_TEXTURE_2D_MULTISAMPLE_ARRAY, GL_TEXTURE_3D,
GL_TEXTURE_CUBE_MAP, GL_TEXTURE_RECTANGLE, and
GL_TEXTURE_CUBE_MAP_ARRAY are accepted.
texture
Specifies the texture object name for
glGetTextureParameterfv, glGetTextureParameteriv,
glGetTextureParameterIiv, and glGetTextureParameterIuiv
functions.
pname
Specifies the symbolic name of a texture parameter.
GL_DEPTH_STENCIL_TEXTURE_MODE,
GL_IMAGE_FORMAT_COMPATIBILITY_TYPE, GL_TEXTURE_BASE_LEVEL,
GL_TEXTURE_BORDER_COLOR, GL_TEXTURE_COMPARE_MODE,
GL_TEXTURE_COMPARE_FUNC, GL_TEXTURE_IMMUTABLE_FORMAT,
GL_TEXTURE_IMMUTABLE_LEVELS, GL_TEXTURE_LOD_BIAS,
GL_TEXTURE_MAG_FILTER, GL_TEXTURE_MAX_LEVEL,
GL_TEXTURE_MAX_LOD, GL_TEXTURE_MIN_FILTER,
GL_TEXTURE_MIN_LOD, GL_TEXTURE_SWIZZLE_R,
GL_TEXTURE_SWIZZLE_G, GL_TEXTURE_SWIZZLE_B,
GL_TEXTURE_SWIZZLE_A, GL_TEXTURE_SWIZZLE_RGBA,
GL_TEXTURE_TARGET, GL_TEXTURE_VIEW_MIN_LAYER,
GL_TEXTURE_VIEW_MIN_LEVEL, GL_TEXTURE_VIEW_NUM_LAYERS,
GL_TEXTURE_VIEW_NUM_LEVELS, GL_TEXTURE_WRAP_S,
GL_TEXTURE_WRAP_T, and GL_TEXTURE_WRAP_R are accepted.
params
Returns the texture parameters.
DESCRIPTION¶
glGetTexParameter and glGetTextureParameter return in
params the value or values of the texture parameter specified as
pname. target defines the target texture. GL_TEXTURE_1D,
GL_TEXTURE_2D, GL_TEXTURE_3D, GL_TEXTURE_1D_ARRAY,
GL_TEXTURE_2D_ARRAY, GL_TEXTURE_RECTANGLE,
GL_TEXTURE_CUBE_MAP, GL_TEXTURE_CUBE_MAP_ARRAY,
GL_TEXTURE_2D_MULTISAMPLE, or GL_TEXTURE_2D_MULTISAMPLE_ARRAY
specify one-, two-, or three-dimensional, one-dimensional array,
two-dimensional array, rectangle, cube-mapped or cube-mapped array,
two-dimensional multisample, or two-dimensional multisample array texturing,
respectively. pname accepts the same symbols as
glTexParameter(), with the same interpretations:
GL_DEPTH_STENCIL_TEXTURE_MODE
Returns the single-value depth stencil texture mode, a
symbolic constant. The initial value is GL_DEPTH_COMPONENT.
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_SWIZZLE_R
Returns the red component swizzle. The initial value is
GL_RED.
GL_TEXTURE_SWIZZLE_G
Returns the green component swizzle. The initial value is
GL_GREEN.
GL_TEXTURE_SWIZZLE_B
Returns the blue component swizzle. The initial value is
GL_BLUE.
GL_TEXTURE_SWIZZLE_A
Returns the alpha component swizzle. The initial value is
GL_ALPHA.
GL_TEXTURE_SWIZZLE_RGBA
Returns the component swizzle for all channels in a
single query.
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_COMPARE_MODE
Returns a single-valued texture comparison mode, a
symbolic constant. The initial value is GL_NONE. See
glTexParameter().
GL_TEXTURE_COMPARE_FUNC
Returns a single-valued texture comparison function, a
symbolic constant. The initial value is GL_LEQUAL. See
glTexParameter().
GL_TEXTURE_VIEW_MIN_LEVEL
Returns a single-valued base level of a texture view
relative to its parent. The initial value is 0. See
glTextureView().
GL_TEXTURE_VIEW_NUM_LEVELS
Returns a single-valued number of levels of detail of a
texture view. See glTextureView().
GL_TEXTURE_VIEW_MIN_LAYER
Returns a single-valued first level of a texture array
view relative to its parent. See glTextureView().
GL_TEXTURE_VIEW_NUM_LAYERS
Returns a single-valued number of layers in a texture
array view. See glTextureView().
GL_TEXTURE_IMMUTABLE_LEVELS
Returns a single-valued number of immutable texture
levels in a texture view. See glTextureView().
In addition to the parameters that may be set with
glTexParameter(), glGetTexParameter and
glGetTextureParameter accept the following read-only parameters:
GL_IMAGE_FORMAT_COMPATIBILITY_TYPE
Returns the matching criteria use for the texture when
used as an image texture. Can return
GL_IMAGE_FORMAT_COMPATIBILITY_BY_SIZE,
GL_IMAGE_FORMAT_COMPATIBILITY_BY_CLASS or GL_NONE.
GL_TEXTURE_IMMUTABLE_FORMAT
Returns non-zero if the texture has an immutable format.
Textures become immutable if their storage is specified with
glTexStorage1D(), glTexStorage2D() or glTexStorage3D().
The initial value is GL_FALSE.
GL_TEXTURE_TARGET
Returns the effective target of the texture object. For
glGetTex*Parameter functions, this is the target parameter. For
glGetTextureParameter*, it is the target to which the texture was
initially bound when it was created, or the value of the target parameter to
the call to glCreateTextures which created the texture.
NOTES¶
If an error is generated, no change is made to the contents of params.
GL_IMAGE_FORMAT_COMPATIBILITY_TYPE is available only if the
GL version is 4.2 or greater.
GL_DEPTH_STENCIL_TEXTURE_MODE,
GL_TEXTURE_VIEW_MIN_LEVEL, GL_TEXTURE_VIEW_NUM_LEVELS,
GL_TEXTURE_VIEW_MIN_LAYER, GL_TEXTURE_VIEW_NUM_LAYERS and
GL_TEXTURE_IMMUTABLE_LEVELS are available only if the GL version is
4.3 or greater.
GL_TEXTURE_TARGET are available only if the GL version is
4.5 or greater.
ERRORS¶
GL_INVALID_ENUM is generated if pname is not an accepted value.
GL_INVALID_ENUM error is generated by
glGetTexParameter if the effective target is not one of the
accepted texture targets.
GL_INVALID_OPERATION is generated by
glGetTextureParameter* if texture is not the name of an
existing texture object.
VERSION SUPPORT¶
|
OpenGL Version |
| Function / Feature Name |
2.0 |
2.1 |
3.0 |
3.1 |
3.2 |
3.3 |
4.0 |
4.1 |
4.2 |
4.3 |
4.4 |
4.5 |
| glGetTexParameterIiv |
- |
- |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
| glGetTexParameterIuiv |
- |
- |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
| glGetTexParameterfv |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
| glGetTexParameteriv |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
| glGetTextureParameterIiv |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
✔ |
| glGetTextureParameterIuiv |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
✔ |
| glGetTextureParameterfv |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
✔ |
| glGetTextureParameteriv |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
✔ |
SEE ALSO¶
glTexParameter(),
glTextureParameter, glTexStorage1D(),
glTexStorage2D(), glTexStorage3D(),
glTextureStorage1D,
glTextureStorage2D,
glTextureStorage3D, glTextureView()
COPYRIGHT¶
Copyright © 1991-2006 Silicon Graphics, Inc. Copyright © 2010-2014
Khronos Group. This document is licensed under the SGI Free Software B
License. For details, see http://oss.sgi.com/projects/FreeB/.
COPYRIGHT¶
Copyright © 1991-2006 Silicon Graphics, Inc.
Copyright © 2010-2014 Khronos Group
