GL_EXT_convolution
http://oss.sgi.com/projects/ogl-sample/registry/EXT/convolution.txt
	GL_CONVOLUTION_1D_EXT 0x8010
	GL_CONVOLUTION_2D_EXT 0x8011
	GL_SEPARABLE_2D_EXT 0x8012
	GL_CONVOLUTION_BORDER_MODE_EXT 0x8013
	GL_CONVOLUTION_FILTER_SCALE_EXT 0x8014
	GL_CONVOLUTION_FILTER_BIAS_EXT 0x8015
	GL_REDUCE_EXT 0x8016
	GL_CONVOLUTION_FORMAT_EXT 0x8017
	GL_CONVOLUTION_WIDTH_EXT 0x8018
	GL_CONVOLUTION_HEIGHT_EXT 0x8019
	GL_MAX_CONVOLUTION_WIDTH_EXT 0x801A
	GL_MAX_CONVOLUTION_HEIGHT_EXT 0x801B
	GL_POST_CONVOLUTION_RED_SCALE_EXT 0x801C
	GL_POST_CONVOLUTION_GREEN_SCALE_EXT 0x801D
	GL_POST_CONVOLUTION_BLUE_SCALE_EXT 0x801E
	GL_POST_CONVOLUTION_ALPHA_SCALE_EXT 0x801F
	GL_POST_CONVOLUTION_RED_BIAS_EXT 0x8020
	GL_POST_CONVOLUTION_GREEN_BIAS_EXT 0x8021
	GL_POST_CONVOLUTION_BLUE_BIAS_EXT 0x8022
	GL_POST_CONVOLUTION_ALPHA_BIAS_EXT 0x8023
	void glConvolutionFilter1DEXT (GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const void* image)
	void glConvolutionFilter2DEXT (GLenum target, GLenum internalformat, GLsizei width, GLsizei height, GLenum format, GLenum type, const void* image)
	void glConvolutionParameterfEXT (GLenum target, GLenum pname, GLfloat param)
	void glConvolutionParameterfvEXT (GLenum target, GLenum pname, const GLfloat* params)
	void glConvolutionParameteriEXT (GLenum target, GLenum pname, GLint param)
	void glConvolutionParameterivEXT (GLenum target, GLenum pname, const GLint* params)
	void glCopyConvolutionFilter1DEXT (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width)
	void glCopyConvolutionFilter2DEXT (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height)
	void glGetConvolutionFilterEXT (GLenum target, GLenum format, GLenum type, void* image)
	void glGetConvolutionParameterfvEXT (GLenum target, GLenum pname, GLfloat* params)
	void glGetConvolutionParameterivEXT (GLenum target, GLenum pname, GLint* params)
	void glGetSeparableFilterEXT (GLenum target, GLenum format, GLenum type, void* row, void* column, void* span)
	void glSeparableFilter2DEXT (GLenum target, GLenum internalformat, GLsizei width, GLsizei height, GLenum format, GLenum type, const void* row, const void* column)