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 . 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.