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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 fil-ter filter
       ter 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)