glGetConvolutionParameter man page on Oracle
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GLGETCONVOLUTIONPARA(3G) OpenGL Manual GLGETCONVOLUTIONPARA(3G)
NAME
glGetConvolutionParameter - get convolution parameters
C SPECIFICATION
void glGetConvolutionParameterfv(GLenum target, GLenum pname,
GLfloat * params);
void glGetConvolutionParameteriv(GLenum target, GLenum pname,
GLint * params);
PARAMETERS
target
The filter whose parameters are to be retrieved. Must be one of
GL_CONVOLUTION_1D, GL_CONVOLUTION_2D, or GL_SEPARABLE_2D.
pname
The parameter to be retrieved. Must be one of
GL_CONVOLUTION_BORDER_MODE, GL_CONVOLUTION_BORDER_COLOR,
GL_CONVOLUTION_FILTER_SCALE, GL_CONVOLUTION_FILTER_BIAS,
GL_CONVOLUTION_FORMAT, GL_CONVOLUTION_WIDTH, GL_CONVOLUTION_HEIGHT,
GL_MAX_CONVOLUTION_WIDTH, or GL_MAX_CONVOLUTION_HEIGHT.
params
Pointer to storage for the parameters to be retrieved.
DESCRIPTION
glGetConvolutionParameter retrieves convolution parameters. target
determines which convolution filter is queried. pname determines which
parameter is returned:
GL_CONVOLUTION_BORDER_MODE
The convolution border mode. See glConvolutionParameter() for a
list of border modes.
GL_CONVOLUTION_BORDER_COLOR
The current convolution border color. params must be a pointer to
an array of four elements, which will receive the red, green, blue,
and alpha border colors.
GL_CONVOLUTION_FILTER_SCALE
The current filter scale factors. params must be a pointer to an
array of four elements, which will receive the red, green, blue,
and alpha filter scale factors in that order.
GL_CONVOLUTION_FILTER_BIAS
The current filter bias factors. params must be a pointer to an
array of four elements, which will receive the red, green, blue,
and alpha filter bias terms in that order.
GL_CONVOLUTION_FORMAT
The current internal format. See glConvolutionFilter1D(),
glConvolutionFilter2D(), and glSeparableFilter2D() for lists of
allowable formats.
GL_CONVOLUTION_WIDTH
The current filter image width.
GL_CONVOLUTION_HEIGHT
The current filter image height.
GL_MAX_CONVOLUTION_WIDTH
The maximum acceptable filter image width.
GL_MAX_CONVOLUTION_HEIGHT
The maximum acceptable filter image height.
ERRORS
GL_INVALID_ENUM is generated if target is not one of the allowable
values.
GL_INVALID_ENUM is generated if pname is not one of the allowable
values.
GL_INVALID_ENUM is generated if target is GL_CONVOLUTION_1D and pname
is GL_CONVOLUTION_HEIGHT or GL_MAX_CONVOLUTION_HEIGHT.
GL_INVALID_OPERATION is generated if glGetConvolutionParameter is
executed between the execution of glBegin() and the corresponding
execution of glEnd().
SEE ALSO
glGetConvolutionFilter(), glGetSeparableFilter(),
glConvolutionParameter()
COPYRIGHT
Copyright © 1991-2006 Silicon Graphics, Inc. This document is licensed
under the SGI Free Software B License. For details, see
http://oss.sgi.com/projects/FreeB/.
AUTHORS
opengl.org
opengl.org 04/29/2014 GLGETCONVOLUTIONPARA(3G)
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