glGetTexParameter(3g)

1GLGETTEXPARAMETER(3G)            OpenGL Manual           GLGETTEXPARAMETER(3G)
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NAME

6       glGetTexParameter - return texture parameter values
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C SPECIFICATION

9       void glGetTexParameterfv(GLenum target, GLenum pname,
10                                GLfloat * params);
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12       void glGetTexParameteriv(GLenum target, GLenum pname, GLint * params);
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14       void glGetTexParameterIiv(GLenum target, GLenum pname, GLint * params);
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16       void glGetTexParameterIuiv(GLenum target, GLenum pname,
17                                  GLuint * params);
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PARAMETERS

20       target
21           Specifies the symbolic name of the target texture.  GL_TEXTURE_1D,
22           GL_TEXTURE_2D, GL_TEXTURE_1D_ARRAY, GL_TEXTURE_2D_ARRAY,
23           GL_TEXTURE_3D, GL_TEXTURE_RECTANGLE, GL_TEXTURE_CUBE_MAP, and
24           GL_TEXTURE_CUBE_MAP_ARRAY are accepted.
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26       pname
27           Specifies the symbolic name of a texture parameter.
28           GL_DEPTH_STENCIL_TEXTURE_MODE, GL_TEXTURE_BASE_LEVEL,
29           GL_TEXTURE_BORDER_COLOR, GL_TEXTURE_COMPARE_MODE,
30           GL_TEXTURE_COMPARE_FUNC, GL_TEXTURE_IMMUTABLE_FORMAT,
31           GL_TEXTURE_IMMUTABLE_LEVELS, GL_TEXTURE_LOD_BIAS,
32           GL_TEXTURE_MAG_FILTER, GL_TEXTURE_MAX_LEVEL, GL_TEXTURE_MAX_LOD,
33           GL_TEXTURE_MIN_FILTER, GL_TEXTURE_MIN_LOD, GL_TEXTURE_SWIZZLE_R,
34           GL_TEXTURE_SWIZZLE_G, GL_TEXTURE_SWIZZLE_B, GL_TEXTURE_SWIZZLE_A,
35           GL_TEXTURE_SWIZZLE_RGBA, GL_TEXTURE_VIEW_MIN_LAYER,
36           GL_TEXTURE_VIEW_MIN_LEVEL, GL_TEXTURE_VIEW_NUM_LAYERS,
37           GL_TEXTURE_VIEW_NUM_LEVELS, GL_TEXTURE_WRAP_S, GL_TEXTURE_WRAP_T,
38           and GL_TEXTURE_WRAP_R are accepted.
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40       params
41           Returns the texture parameters.
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DESCRIPTION

44       glGetTexParameter returns in params the value or values of the texture
45       parameter specified as pname.  target defines the target texture.
46       GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D, GL_TEXTURE_1D_ARRAY,
47       GL_TEXTURE_2D_ARRAY, GL_TEXTURE_RECTANGLE, GL_TEXTURE_CUBE_MAP,
48       GL_TEXTURE_CUBE_MAP_ARRAY specify one-, two-, or three-dimensional,
49       one-dimensional array, two-dimensional array, rectangle, cube-mapped or
50       cube-mapped array texturing, respectively.  pname accepts the same
51       symbols as glTexParameter(), with the same interpretations:
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53       GL_DEPTH_STENCIL_TEXTURE_MODE
54           Returns the single-value depth stencil texture mode, a symbolic
55           constant. The initial value is GL_DEPTH_COMPONENT.
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57       GL_TEXTURE_MAG_FILTER
58           Returns the single-valued texture magnification filter, a symbolic
59           constant. The initial value is GL_LINEAR.
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61       GL_TEXTURE_MIN_FILTER
62           Returns the single-valued texture minification filter, a symbolic
63           constant. The initial value is GL_NEAREST_MIPMAP_LINEAR.
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65       GL_TEXTURE_MIN_LOD
66           Returns the single-valued texture minimum level-of-detail value.
67           The initial value is -1000.
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69       GL_TEXTURE_MAX_LOD
70           Returns the single-valued texture maximum level-of-detail value.
71           The initial value is 1000.
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73       GL_TEXTURE_BASE_LEVEL
74           Returns the single-valued base texture mipmap level. The initial
75           value is 0.
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77       GL_TEXTURE_MAX_LEVEL
78           Returns the single-valued maximum texture mipmap array level. The
79           initial value is 1000.
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81       GL_TEXTURE_SWIZZLE_R
82           Returns the red component swizzle. The initial value is GL_RED.
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84       GL_TEXTURE_SWIZZLE_G
85           Returns the green component swizzle. The initial value is GL_GREEN.
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87       GL_TEXTURE_SWIZZLE_B
88           Returns the blue component swizzle. The initial value is GL_BLUE.
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90       GL_TEXTURE_SWIZZLE_A
91           Returns the alpha component swizzle. The initial value is GL_ALPHA.
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93       GL_TEXTURE_SWIZZLE_RGBA
94           Returns the component swizzle for all channels in a single query.
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96       GL_TEXTURE_WRAP_S
97           Returns the single-valued wrapping function for texture coordinate
98           s, a symbolic constant. The initial value is GL_REPEAT.
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100       GL_TEXTURE_WRAP_T
101           Returns the single-valued wrapping function for texture coordinate
102           t, a symbolic constant. The initial value is GL_REPEAT.
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104       GL_TEXTURE_WRAP_R
105           Returns the single-valued wrapping function for texture coordinate
106           r, a symbolic constant. The initial value is GL_REPEAT.
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108       GL_TEXTURE_BORDER_COLOR
109           Returns four integer or floating-point numbers that comprise the
110           RGBA color of the texture border. Floating-point values are
111           returned in the range 0 1. Integer values are returned as a linear
112           mapping of the internal floating-point representation such that 1.0
113           maps to the most positive representable integer and -1.0 maps to
114           the most negative representable integer. The initial value is (0,
115           0, 0, 0).
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117       GL_TEXTURE_COMPARE_MODE
118           Returns a single-valued texture comparison mode, a symbolic
119           constant. The initial value is GL_NONE. See glTexParameter().
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121       GL_TEXTURE_COMPARE_FUNC
122           Returns a single-valued texture comparison function, a symbolic
123           constant. The initial value is GL_LEQUAL. See glTexParameter().
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125       GL_TEXTURE_VIEW_MIN_LEVEL
126           Returns a single-valued base level of a texture view relative to
127           its parent. The initial value is 0. See glTextureView().
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129       GL_TEXTURE_VIEW_NUM_LEVELS
130           Returns a single-valued number of levels of detail of a texture
131           view. See glTextureView().
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133       GL_TEXTURE_VIEW_MIN_LAYER
134           Returns a single-valued first level of a texture array view
135           relative to its parent. See glTextureView().
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137       GL_TEXTURE_VIEW_NUM_LAYERS
138           Returns a single-valued number of layers in a texture array view.
139           See glTextureView().
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141       GL_TEXTURE_IMMUTABLE_LEVELS
142           Returns a single-valued number of immutable texture levels in a
143           texture view. See glTextureView().
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145       In addition to the parameters that may be set with glTexParameter(),
146       glGetTexParameter accepts the following read-only parameters:
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148       GL_TEXTURE_IMMUTABLE_FORMAT
149           Returns non-zero if the texture has an immutable format. Textures
150           become immutable if their storage is specified with
151           glTexStorage1D(), glTexStorage2D() or glTexStorage3D(). The initial
152           value is GL_FALSE.
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NOTES

155       If an error is generated, no change is made to the contents of params.
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157       GL_DEPTH_STENCIL_TEXTURE_MODE, GL_TEXTURE_VIEW_MIN_LEVEL,
158       GL_TEXTURE_VIEW_NUM_LEVELS, GL_TEXTURE_VIEW_MIN_LAYER,
159       GL_TEXTURE_VIEW_NUM_LAYERS and GL_TEXTURE_IMMUTABLE_LEVELS are
160       available only if the GL version is 4.3 or greater.
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ERRORS

163       GL_INVALID_ENUM is generated if target or pname is not an accepted
164       value.
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COPYRIGHT

171       Copyright © 1991-2006 Silicon Graphics, Inc. Copyright © 2010-2012
172       Khronos Group. This document is licensed under the SGI Free Software B
173       License. For details, see http://oss.sgi.com/projects/FreeB/.
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AUTHORS

176       opengl.org
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180opengl.org                        06/10/2014             GLGETTEXPARAMETER(3G)