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

6       glGetConvolutionParameter - get convolution parameters
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C SPECIFICATION

9       void glGetConvolutionParameterfv(GLenum target, GLenum pname,
10                                        GLfloat * params);
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12       void glGetConvolutionParameteriv(GLenum target, GLenum pname,
13                                        GLint * params);
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PARAMETERS

16       target
17           The filter whose parameters are to be retrieved. Must be one of
18           GL_CONVOLUTION_1D, GL_CONVOLUTION_2D, or GL_SEPARABLE_2D.
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20       pname
21           The parameter to be retrieved. Must be one of
22           GL_CONVOLUTION_BORDER_MODE, GL_CONVOLUTION_BORDER_COLOR,
23           GL_CONVOLUTION_FILTER_SCALE, GL_CONVOLUTION_FILTER_BIAS,
24           GL_CONVOLUTION_FORMAT, GL_CONVOLUTION_WIDTH, GL_CONVOLUTION_HEIGHT,
25           GL_MAX_CONVOLUTION_WIDTH, or GL_MAX_CONVOLUTION_HEIGHT.
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27       params
28           Pointer to storage for the parameters to be retrieved.
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DESCRIPTION

31       glGetConvolutionParameter retrieves convolution parameters.  target
32       determines which convolution filter is queried.  pname determines which
33       parameter is returned:
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35       GL_CONVOLUTION_BORDER_MODE
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37           The convolution border mode. See glConvolutionParameter() for a
38           list of border modes.
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40       GL_CONVOLUTION_BORDER_COLOR
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42           The current convolution border color.  params must be a pointer to
43           an array of four elements, which will receive the red, green, blue,
44           and alpha border colors.
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46       GL_CONVOLUTION_FILTER_SCALE
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48           The current filter scale factors.  params must be a pointer to an
49           array of four elements, which will receive the red, green, blue,
50           and alpha filter scale factors in that order.
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52       GL_CONVOLUTION_FILTER_BIAS
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54           The current filter bias factors.  params must be a pointer to an
55           array of four elements, which will receive the red, green, blue,
56           and alpha filter bias terms in that order.
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58       GL_CONVOLUTION_FORMAT
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60           The current internal format. See glConvolutionFilter1D(),
61           glConvolutionFilter2D(), and glSeparableFilter2D() for lists of
62           allowable formats.
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64       GL_CONVOLUTION_WIDTH
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66           The current filter image width.
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68       GL_CONVOLUTION_HEIGHT
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70           The current filter image height.
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72       GL_MAX_CONVOLUTION_WIDTH
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74           The maximum acceptable filter image width.
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76       GL_MAX_CONVOLUTION_HEIGHT
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78           The maximum acceptable filter image height.
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ERRORS

81       GL_INVALID_ENUM is generated if target is not one of the allowable
82       values.
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84       GL_INVALID_ENUM is generated if pname is not one of the allowable
85       values.
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87       GL_INVALID_ENUM is generated if target is GL_CONVOLUTION_1D and pname
88       is GL_CONVOLUTION_HEIGHT or GL_MAX_CONVOLUTION_HEIGHT.
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90       GL_INVALID_OPERATION is generated if glGetConvolutionParameter is
91       executed between the execution of glBegin() and the corresponding
92       execution of glEnd().
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SEE ALSO

95       glGetConvolutionFilter(), glGetSeparableFilter(),
96       glConvolutionParameter()
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99       Copyright © 1991-2006 Silicon Graphics, Inc. This document is licensed
100       under the SGI Free Software B License. For details, see
101       http://oss.sgi.com/projects/FreeB/.
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AUTHORS

104       opengl.org
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108opengl.org                        06/10/2014          GLGETCONVOLUTIONPARA(3G)
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