GLGETCONVOLUTIONPARAMETER - Online Linux Manual PageSection : 3G

NAME"glGetConvolutionParameterfv, glGetConvolutionParameteriv − get convolution parameters

C SPECIFICATIONvoid glGetConvolutionParameterfv( GLenum target, GLenum pname, GLfloat *params )void glGetConvolutionParameteriv( GLenum target, GLenum pname, GLint *params )

PARAMETERStarget  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.

DESCRIPTION­glGetConvolutionParameter 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.

ERRORS­GL_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 ALSO­glGetConvolutionFilter(3G), ­glGetSeparableFilter2D(3G), ­glConvolutionParameter(3G)
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