C

SWFFilter 
newConvolutionFilter(SWFFilterMatrix matrix /* matrix */, 
                     float divisor /* divisor applied to matrix */,
                     float bias /* matrix bias */,
                     SWFColor color /* default color */,
                     int flags /* FILTER_FLAG_CLAMP , FILTER_FLAG_PRESERVE_ALPHA */)

/*
 * create a new FilterMatrix (constructor)
 * This function creates a new SFWFilterMatrix. Only useful 
 * for creating SWFFilter objects.
 */
SWFFilterMatrix 
newSWFFilterMatrix(int cols /* number of cols */, 
                   int rows /* number of rows */, 
                   float *vals /* vals[cols * rows]. Will be copied */)

Example

PHP

$f = new SWFFilter(SWFFILTER_TYPE_CONVOLUTION, $filterMatrix, $divisor, $bias, $colorHash, $flags);