GLGETTEXPARAMETER - Online Linux Manual PageSection : 3G
Updated : 01/20/2022
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Note : [FIXME: manual]
NAMEglGetTexParameter − return texture parameter values
C SPECIFICATIONvoid 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);
PARAMETERStarget 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​.
DESCRIPTIONglGetTexParameter 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​.
NOTESIf 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​.
ERRORSGL_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 none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'> 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 ALSOglTexParameter(), glTextureParameter, glTexStorage1D(), glTexStorage2D(), glTexStorage3D(), glTextureStorage1D, glTextureStorage2D, glTextureStorage3D, glTextureView()
COPYRIGHTCopyright © 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/​.
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Copyright © 1991-2006 Silicon Graphics, Inc.
Copyright © 2010-2014 Khronos Group
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