git.maemo.org Git - opencv/blob - interfaces/swig/python/imagedata.i

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  10 //                        Intel License Agreement
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  41
  42
  43 // 2004-03-16, Gabriel Schreiber <schreiber@ient.rwth-aachen.de>
  44 //             Mark Asbach       <asbach@ient.rwth-aachen.de>
  45 //             Institute of Communications Engineering, RWTH Aachen University
  46
  47 // 2006-08-29  Roman Stanchak -- converted to use CvMat rather than IplImage
  48
  49
  50 %{
  51
  52 /// Accessor to convert a Python string into the imageData.
  53 void CvMat_imageData_set(CvMat * self, PyObject* object)
  54 {
  55         char* py_string = PyString_AsString(object);
  56         int depth = CV_MAT_DEPTH(self->type);
  57         int cn = CV_MAT_CN(self->type);
  58
  59         int step = self->step ? self->step : CV_ELEM_SIZE(self->type) * self->cols;
  60
  61         if (depth == CV_8U && cn==3){
  62                 // RGB case
  63                 // The data is reordered beause OpenCV uses BGR instead of RGB
  64
  65                 for (long line = 0; line < self->rows; ++line)
  66                         for (long pixel = 0; pixel < self->cols; ++pixel)
  67                         {
  68                                 // In OpenCV the beginning of the lines are aligned
  69                                 // to 4 Bytes. So use step instead of cols.
  70                                 long position = line*step + pixel*3;
  71                                 long sourcepos = line*self->cols*3 + pixel*3;
  72                                 self->data.ptr[position  ] = py_string[sourcepos+2];
  73                                 self->data.ptr[position+1] = py_string[sourcepos+1];
  74                                 self->data.ptr[position+2] = py_string[sourcepos  ];
  75                         }
  76         }
  77         else if (depth == CV_8U && cn==1)
  78         {
  79                 // Grayscale 8bit case
  80
  81                 for (long line = 0; line < self->rows; ++line)
  82                 {
  83                         // In OpenCV the beginning of the lines are aligned
  84                         // to 4 Bytes. So use step instead of cols.
  85                         memcpy
  86                                 (
  87                                  self->data.ptr + line*step,
  88                                  py_string + line*self->cols,
  89                                  step
  90                                 );
  91                 }
  92         }
  93         else if ( depth == CV_32F )
  94         {
  95                 // float (32bit) case
  96                 for (long line = 0; line < self->rows; ++line)
  97                 {
  98                         // here we don not have to care about alignment as the Floats are
  99                         // as long as the alignment
 100                         memcpy
 101                                 (
 102                                  self->data.ptr + line*step,
 103                                  py_string + line*self->cols*sizeof(float),
 104                                  step
 105                                 );
 106                 }
 107         }
 108         else if ( depth == CV_64F )
 109         {
 110                 // double (64bit) case
 111                 for (long line = 0; line < self->rows; ++line)
 112                 {
 113                         // here we don not have to care about alignment as the Floats are
 114                         // as long as the alignment
 115                         memcpy
 116                                 (
 117                                  self->data.ptr + line*step,
 118                                  py_string + line*self->cols*sizeof(double),
 119                                  step
 120                                 );
 121                 }
 122         }
 123         else
 124         {
 125           // make some noise
 126           SendErrorToPython (SWIG_TypeError,
 127                        "CvMat_imageData_set",
 128                        "cannot convert string data to this image format",
 129                        __FILE__, __LINE__, NULL);
 130         }
 131 }
 132
 133 /// Accessor to convert the imageData into a Python string.
 134 PyObject* CvMat_imageData_get(CvMat * self)
 135 {
 136         if (!self->data.ptr)
 137         {
 138                 PyErr_SetString(PyExc_TypeError, "Data pointer of CvMat is NULL");
 139                 return NULL;
 140         }
 141
 142
 143         int step = self->step ? self->step : CV_ELEM_SIZE(self->type) * self->cols;
 144         return PyString_FromStringAndSize((const char *)self->data.ptr, self->rows*step);
 145 }
 146
 147 %}
 148
 149 // add virtual member variable to CvMat
 150 %extend CvMat {
 151         PyObject * imageData;
 152 };