GLGETCONVOLUTIONPARAMETER(3G)											     GLGETCONVOLUTIONPARAMETER(3G)

NAME

       glGetConvolutionParameterfv, glGetConvolutionParameteriv - 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 .  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(3G), glGetSeparableFilter2D(3G), glConvolutionParameter(3G)

														     GLGETCONVOLUTIONPARAMETER(3G)