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_INVALID_ENUM is generated if target is not one of the allowable val-
       ues.

       GL_INVALID_ENUM is generated if pname is not one of the allowable  val-
       ues.

       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  exe-
       cuted  between the execution of glBegin and the corresponding execution
       of glEnd.

SEE ALSO

       glGetConvolutionFilter, glGetSeparableFilter2D, glConvolutionParameter



                                                 GLGETCONVOLUTIONPARAMETER(3G)