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Manual Reference Pages  - GLGETCONVOLUTIONPARAMETER (3G)

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glGetConvolutionParameterfv, glGetConvolutionParameteriv - get convolution parameters

CONTENTS

C Specification
Parameters
Description
Errors
See Also

void glGetConvolutionParameterfv( GLenum target,

                                GLenum pname,
                                GLfloat *params )

void glGetConvolutionParameteriv( GLenum target,

                                GLenum pname,
                                GLint *params )

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.

 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.

 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.

 glGetConvolutionFilter(3G),  glGetSeparableFilter2D(3G),  glConvolutionParameter(3G)

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