{

PyArrayObject* matrix = NULL;

/** If None either raise a TypeError or return an agg identity transform. */

if (obj == Py_None)

{

if (errors)

{

throw Py::TypeError("Cannot convert None to an affine transform.");

}

return agg::trans_affine();

}

/** Try turning the object into an affine transform matrix. */

try

{

matrix = (PyArrayObject*) PyArray_FromObject(obj, PyArray_DOUBLE, 2, 2);

if (!matrix)

throw std::exception();

}

catch (...)

{

Py_XDECREF(matrix);

if (errors)

{

throw Py::TypeError("Unable to get an affine transform matrix from the given object.");

}

return agg::trans_affine();

}

/** Try turning the matrix into an agg transform. */

try

{

if (PyArray_NDIM(matrix) == 2 || PyArray_DIM(matrix, 0) == 3 || PyArray_DIM(matrix, 1) == 3)

{

size_t stride0 = PyArray_STRIDE(matrix, 0);

size_t stride1 = PyArray_STRIDE(matrix, 1);

char* row0 = PyArray_BYTES(matrix);

char* row1 = row0 + stride0;

double a = *(double*)(row0);

row0 += stride1;

double c = *(double*)(row0);

row0 += stride1;

double e = *(double*)(row0);

double b = *(double*)(row1);

row1 += stride1;

double d = *(double*)(row1);

row1 += stride1;

double f = *(double*)(row1);

Py_XDECREF(matrix);

return agg::trans_affine(a, b, c, d, e, f);

}

throw std::exception();

}

catch (...)

{

if (errors)

{

Py_XDECREF(matrix);

throw Py::TypeError("Invalid affine transformation matrix.");

}

}

Py_XDECREF(matrix);

return agg::trans_affine();

{

PyArrayObject* bbox = NULL;

if (bbox_obj == Py_None)

return false;

try

{

bbox = (PyArrayObject*) PyArray_FromObject(bbox_obj, PyArray_DOUBLE, 2, 2);

if (!bbox || PyArray_NDIM(bbox) != 2 || PyArray_DIM(bbox, 0) != 2 || PyArray_DIM(bbox, 1) != 2)

{

throw Py::TypeError

("Expected a bbox array");

}

l = *(double*)PyArray_GETPTR2(bbox, 0, 0);

b = *(double*)PyArray_GETPTR2(bbox, 0, 1);

r = *(double*)PyArray_GETPTR2(bbox, 1, 0);

t = *(double*)PyArray_GETPTR2(bbox, 1, 1);

Py_XDECREF(bbox);

bbox = NULL;

return true;

}

catch (...)

{

Py_XDECREF(bbox);

bbox = NULL;

throw;

}

return false;