(
GLenum ( target ) , GLenum ( format ) , GLenum ( type ) , GLvoid * ( row ) , GLvoid * ( column ) , GLvoid * ( span ))-> void
Parameters Variables Description targetThe separable filter to be retrieved. Must be GL_SEPARABLE_2D .
formatFormat of the output images. Must be one of GL_RED , GL_GREEN , GL_BLUE , GL_ALPHA , GL_RGB , GL_BGR GL_RGBA , GL_BGRA , GL_LUMINANCE , or GL_LUMINANCE_ALPHA .
typeData type of components in the output images. Symbolic constants GL_UNSIGNED_BYTE , GL_BYTE , GL_BITMAP , GL_UNSIGNED_SHORT , GL_SHORT , GL_UNSIGNED_INT , GL_INT , GL_FLOAT , GL_UNSIGNED_BYTE_3_3_2 , GL_UNSIGNED_BYTE_2_3_3_REV , GL_UNSIGNED_SHORT_5_6_5 , GL_UNSIGNED_SHORT_5_6_5_REV , GL_UNSIGNED_SHORT_4_4_4_4 , GL_UNSIGNED_SHORT_4_4_4_4_REV , GL_UNSIGNED_SHORT_5_5_5_1 , GL_UNSIGNED_SHORT_1_5_5_5_REV , GL_UNSIGNED_INT_8_8_8_8 , GL_UNSIGNED_INT_8_8_8_8_REV , GL_UNSIGNED_INT_10_10_10_2 , and GL_UNSIGNED_INT_2_10_10_10_REV are accepted.
rowPointer to storage for the row filter image.
columnPointer to storage for the column filter image.
spanPointer to storage for the span filter image (currently unused).
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