glGetSamplerParameter man page on Darwin
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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 © 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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