glgetsamplerparameter(3g) [osx man page]
GLGETSAMPLERPARAMETE(3G) OpenGL 3.3 GLGETSAMPLERPARAMETE(3G) NAME
glGetSamplerParameter - return sampler parameter values C SPECIFICATION
void glGetSamplerParameterfv(GLuint sampler, GLenum pname, GLfloat * params); void glGetSamplerParameteriv(GLuint sampler, GLenum pname, GLint * params); PARAMETERS
sampler Specifies name of the sampler object from which to retrieve parameters. pname Specifies the symbolic name of a sampler parameter. GL_TEXTURE_MAG_FILTER, GL_TEXTURE_MIN_FILTER, GL_TEXTURE_MIN_LOD, GL_TEXTURE_MAX_LOD, GL_TEXTURE_LOD_BIAS, GL_TEXTURE_WRAP_S, GL_TEXTURE_WRAP_T, GL_TEXTURE_WRAP_R, GL_TEXTURE_BORDER_COLOR, GL_TEXTURE_COMPARE_MODE, and GL_TEXTURE_COMPARE_FUNC are accepted. params Returns the sampler parameters. DESCRIPTION
glGetSamplerParameter returns in params the value or values of the sampler parameter specified as pname. sampler defines the target sampler, and must be the name of an existing sampler object, returned from a previous call to glGenSamplers(). pname accepts the same symbols as glSamplerParameter(), 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_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 glSamplerParameter(). GL_TEXTURE_COMPARE_FUNC Returns a single-valued texture comparison function, a symbolic constant. The initial value is GL_LEQUAL. See glSamplerParameter(). NOTES
If an error is generated, no change is made to the contents of params. glGetSamplerParameter is available only if the GL version is 3.3 or higher. ERRORS
GL_INVALID_VALUE is generated if sampler is not the name of a sampler object returned from a previous call to glGenSamplers(). GL_INVALID_ENUM is generated if pname is not an accepted value. SEE ALSO
glSamplerParameter(), glGenSamplers(), glDeleteSamplers(), glSamplerParameter() COPYRIGHT
Copyright (C) 2010 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/. OpenGL 3.3 03/08/2011 GLGETSAMPLERPARAMETE(3G)
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GLGETTEXPARAMETER(3G) GLGETTEXPARAMETER(3G) NAME
glGetTexParameterfv, glGetTexParameteriv - return texture parameter values C SPECIFICATION
void glGetTexParameterfv( GLenum target, GLenum pname, GLfloat *params ) void glGetTexParameteriv( GLenum target, GLenum pname, GLint *params ) PARAMETERS
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. DESCRIPTION
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 sym- bols 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. NOTES
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. ERRORS
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. SEE ALSO
glAreTexturesResident(3G), glPrioritizeTextures(3G), glTexParameter(3G) GLGETTEXPARAMETER(3G)