#include "precomp.hpp"

CV_IMPL CvSeq* cvPointSeqFromMat( int seq_kind, const CvArr* arr,

CvContour* contour_header, CvSeqBlock* block )

{

CV_Assert( arr != 0 && contour_header != 0 && block != 0 );

int eltype;

CvMat hdr;

CvMat* mat = (CvMat*)arr;

if( !CV_IS_MAT( mat ))

CV_Error( CV_StsBadArg, "Input array is not a valid matrix" );

if( CV_MAT_CN(mat->type) == 1 && mat->width == 2 )

mat = cvReshape(mat, &hdr, 2);

eltype = CV_MAT_TYPE( mat->type );

if( eltype != CV_32SC2 && eltype != CV_32FC2 )

CV_Error( CV_StsUnsupportedFormat,

"The matrix can not be converted to point sequence because of "

"inappropriate element type" );

if( (mat->width != 1 && mat->height != 1) || !CV_IS_MAT_CONT(mat->type))

CV_Error( CV_StsBadArg,

"The matrix converted to point sequence must be "

"1-dimensional and continuous" );

cvMakeSeqHeaderForArray(

(seq_kind & (CV_SEQ_KIND_MASK|CV_SEQ_FLAG_CLOSED)) | eltype,

sizeof(CvContour), CV_ELEM_SIZE(eltype), mat->data.ptr,

mat->width*mat->height, (CvSeq*)contour_header, block );

return (CvSeq*)contour_header;

}

CV_IMPL void

cvCopyMakeBorder( const CvArr* srcarr, CvArr* dstarr, CvPoint offset,

}