Probably like this:
glConvolutionFilter2D(GL_CONVOLUTION_2D, GL_LUMINANCE4, size, size, GL_LUMINANCE, GL_FLOAT, varptr(filter[0]) )
glConvolutionFilter2D(GL_CONVOLUTION_2D, GL_LUMINANCE4, size, size, GL_LUMINANCE, GL_FLOAT, varptr(filter[0]) )
How to call :OGL Convolution Filter
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