1991-2006 Silicon Graphics, Inc. glGetConvolutionParameter 3G glGetConvolutionParameter get convolution parameters void glGetConvolutionParameterfv GLenum target GLenum pname GLfloat * params void glGetConvolutionParameteriv GLenum target GLenum pname GLint * params 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. 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. 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. glGetConvolutionFilter, glGetSeparableFilter, glConvolutionParameter 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/.