glGetConvolutionParameter man page on Darwin

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GLGETCONVOLUTIONPARAMETER(3G)			 GLGETCONVOLUTIONPARAMETER(3G)

NAME
       glGetConvolutionParameterfv, glGetConvolutionParameteriv - get convolu‐
       tion 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 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)
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