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Copy pathpy_converters.cpp
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602 lines (491 loc) · 14.9 KB
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#define NO_IMPORT_ARRAY
#define PY_SSIZE_T_CLEAN
#include "py_converters.h"
#include "numpy_cpp.h"
#include "agg_basics.h"
#include "agg_color_rgba.h"
#include "agg_math_stroke.h"
extern "C" {
static int convert_string_enum(PyObject *obj, const char *name, const char **names, int *values, int *result)
{
PyObject *bytesobj;
char *str;
if (obj == NULL || obj == Py_None) {
return 1;
}
if (PyUnicode_Check(obj)) {
bytesobj = PyUnicode_AsASCIIString(obj);
if (bytesobj == NULL) {
return 0;
}
} else if (PyBytes_Check(obj)) {
Py_INCREF(obj);
bytesobj = obj;
} else {
PyErr_Format(PyExc_TypeError, "%s must be str or bytes", name);
return 0;
}
str = PyBytes_AsString(bytesobj);
if (str == NULL) {
Py_DECREF(bytesobj);
return 0;
}
for ( ; *names != NULL; names++, values++) {
if (strncmp(str, *names, 64) == 0) {
*result = *values;
Py_DECREF(bytesobj);
return 1;
}
}
PyErr_Format(PyExc_ValueError, "invalid %s value", name);
Py_DECREF(bytesobj);
return 0;
}
int convert_from_method(PyObject *obj, const char *name, converter func, void *p)
{
PyObject *value;
value = PyObject_CallMethod(obj, name, NULL);
if (value == NULL) {
if (!PyObject_HasAttrString(obj, name)) {
PyErr_Clear();
return 1;
}
return 0;
}
if (!func(value, p)) {
Py_DECREF(value);
return 0;
}
Py_DECREF(value);
return 1;
}
int convert_from_attr(PyObject *obj, const char *name, converter func, void *p)
{
PyObject *value;
value = PyObject_GetAttrString(obj, name);
if (value == NULL) {
if (!PyObject_HasAttrString(obj, name)) {
PyErr_Clear();
return 1;
}
return 0;
}
if (!func(value, p)) {
Py_DECREF(value);
return 0;
}
Py_DECREF(value);
return 1;
}
int convert_double(PyObject *obj, void *p)
{
double *val = (double *)p;
*val = PyFloat_AsDouble(obj);
if (PyErr_Occurred()) {
return 0;
}
return 1;
}
int convert_bool(PyObject *obj, void *p)
{
bool *val = (bool *)p;
switch (PyObject_IsTrue(obj)) {
case 0: *val = false; break;
case 1: *val = true; break;
default: return 0; // errored.
}
return 1;
}
int convert_cap(PyObject *capobj, void *capp)
{
const char *names[] = {"butt", "round", "projecting", NULL};
int values[] = {agg::butt_cap, agg::round_cap, agg::square_cap};
int result = agg::butt_cap;
if (!convert_string_enum(capobj, "capstyle", names, values, &result)) {
return 0;
}
*(agg::line_cap_e *)capp = (agg::line_cap_e)result;
return 1;
}
int convert_join(PyObject *joinobj, void *joinp)
{
const char *names[] = {"miter", "round", "bevel", NULL};
int values[] = {agg::miter_join_revert, agg::round_join, agg::bevel_join};
int result = agg::miter_join_revert;
if (!convert_string_enum(joinobj, "joinstyle", names, values, &result)) {
return 0;
}
*(agg::line_join_e *)joinp = (agg::line_join_e)result;
return 1;
}
int convert_rect(PyObject *rectobj, void *rectp)
{
agg::rect_d *rect = (agg::rect_d *)rectp;
if (rectobj == NULL || rectobj == Py_None) {
rect->x1 = 0.0;
rect->y1 = 0.0;
rect->x2 = 0.0;
rect->y2 = 0.0;
} else {
PyArrayObject *rect_arr = (PyArrayObject *)PyArray_ContiguousFromAny(
rectobj, NPY_DOUBLE, 1, 2);
if (rect_arr == NULL) {
return 0;
}
if (PyArray_NDIM(rect_arr) == 2) {
if (PyArray_DIM(rect_arr, 0) != 2 ||
PyArray_DIM(rect_arr, 1) != 2) {
PyErr_SetString(PyExc_ValueError, "Invalid bounding box");
Py_DECREF(rect_arr);
return 0;
}
} else { // PyArray_NDIM(rect_arr) == 1
if (PyArray_DIM(rect_arr, 0) != 4) {
PyErr_SetString(PyExc_ValueError, "Invalid bounding box");
Py_DECREF(rect_arr);
return 0;
}
}
double *buff = (double *)PyArray_DATA(rect_arr);
rect->x1 = buff[0];
rect->y1 = buff[1];
rect->x2 = buff[2];
rect->y2 = buff[3];
Py_DECREF(rect_arr);
}
return 1;
}
int convert_rgba(PyObject *rgbaobj, void *rgbap)
{
agg::rgba *rgba = (agg::rgba *)rgbap;
PyObject *rgbatuple = NULL;
int success = 1;
if (rgbaobj == NULL || rgbaobj == Py_None) {
rgba->r = 0.0;
rgba->g = 0.0;
rgba->b = 0.0;
rgba->a = 0.0;
} else {
if (!(rgbatuple = PySequence_Tuple(rgbaobj))) {
success = 0;
goto exit;
}
rgba->a = 1.0;
if (!PyArg_ParseTuple(
rgbatuple, "ddd|d:rgba", &(rgba->r), &(rgba->g), &(rgba->b), &(rgba->a))) {
success = 0;
goto exit;
}
}
exit:
Py_XDECREF(rgbatuple);
return success;
}
int convert_dashes(PyObject *dashobj, void *dashesp)
{
Dashes *dashes = (Dashes *)dashesp;
double dash_offset = 0.0;
PyObject *dashes_seq = NULL;
if (!PyArg_ParseTuple(dashobj, "dO:dashes", &dash_offset, &dashes_seq)) {
return 0;
}
if (dashes_seq == Py_None) {
return 1;
}
if (!PySequence_Check(dashes_seq)) {
PyErr_SetString(PyExc_TypeError, "Invalid dashes sequence");
return 0;
}
Py_ssize_t nentries = PySequence_Size(dashes_seq);
// If the dashpattern has odd length, iterate through it twice (in
// accordance with the pdf/ps/svg specs).
Py_ssize_t dash_pattern_length = (nentries % 2) ? 2 * nentries : nentries;
for (Py_ssize_t i = 0; i < dash_pattern_length; ++i) {
PyObject *item;
double length;
double skip;
item = PySequence_GetItem(dashes_seq, i % nentries);
if (item == NULL) {
return 0;
}
length = PyFloat_AsDouble(item);
if (PyErr_Occurred()) {
Py_DECREF(item);
return 0;
}
Py_DECREF(item);
++i;
item = PySequence_GetItem(dashes_seq, i % nentries);
if (item == NULL) {
return 0;
}
skip = PyFloat_AsDouble(item);
if (PyErr_Occurred()) {
Py_DECREF(item);
return 0;
}
Py_DECREF(item);
dashes->add_dash_pair(length, skip);
}
dashes->set_dash_offset(dash_offset);
return 1;
}
int convert_dashes_vector(PyObject *obj, void *dashesp)
{
DashesVector *dashes = (DashesVector *)dashesp;
if (!PySequence_Check(obj)) {
return 0;
}
Py_ssize_t n = PySequence_Size(obj);
for (Py_ssize_t i = 0; i < n; ++i) {
PyObject *item;
Dashes subdashes;
item = PySequence_GetItem(obj, i);
if (item == NULL) {
return 0;
}
if (!convert_dashes(item, &subdashes)) {
Py_DECREF(item);
return 0;
}
Py_DECREF(item);
dashes->push_back(subdashes);
}
return 1;
}
int convert_trans_affine(PyObject *obj, void *transp)
{
agg::trans_affine *trans = (agg::trans_affine *)transp;
/** If None assume identity transform. */
if (obj == NULL || obj == Py_None) {
return 1;
}
PyArrayObject *array = (PyArrayObject *)PyArray_ContiguousFromAny(obj, NPY_DOUBLE, 2, 2);
if (array == NULL) {
return 0;
}
if (PyArray_DIM(array, 0) == 3 && PyArray_DIM(array, 1) == 3) {
double *buffer = (double *)PyArray_DATA(array);
trans->sx = buffer[0];
trans->shx = buffer[1];
trans->tx = buffer[2];
trans->shy = buffer[3];
trans->sy = buffer[4];
trans->ty = buffer[5];
Py_DECREF(array);
return 1;
}
Py_DECREF(array);
PyErr_SetString(PyExc_ValueError, "Invalid affine transformation matrix");
return 0;
}
int convert_path(PyObject *obj, void *pathp)
{
py::PathIterator *path = (py::PathIterator *)pathp;
PyObject *vertices_obj = NULL;
PyObject *codes_obj = NULL;
PyObject *should_simplify_obj = NULL;
PyObject *simplify_threshold_obj = NULL;
bool should_simplify;
double simplify_threshold;
int status = 0;
if (obj == NULL || obj == Py_None) {
return 1;
}
vertices_obj = PyObject_GetAttrString(obj, "vertices");
if (vertices_obj == NULL) {
goto exit;
}
codes_obj = PyObject_GetAttrString(obj, "codes");
if (codes_obj == NULL) {
goto exit;
}
should_simplify_obj = PyObject_GetAttrString(obj, "should_simplify");
if (should_simplify_obj == NULL) {
goto exit;
}
switch (PyObject_IsTrue(should_simplify_obj)) {
case 0: should_simplify = 0; break;
case 1: should_simplify = 1; break;
default: goto exit; // errored.
}
simplify_threshold_obj = PyObject_GetAttrString(obj, "simplify_threshold");
if (simplify_threshold_obj == NULL) {
goto exit;
}
simplify_threshold = PyFloat_AsDouble(simplify_threshold_obj);
if (PyErr_Occurred()) {
goto exit;
}
if (!path->set(vertices_obj, codes_obj, should_simplify, simplify_threshold)) {
goto exit;
}
status = 1;
exit:
Py_XDECREF(vertices_obj);
Py_XDECREF(codes_obj);
Py_XDECREF(should_simplify_obj);
Py_XDECREF(simplify_threshold_obj);
return status;
}
int convert_pathgen(PyObject *obj, void *pathgenp)
{
py::PathGenerator *paths = (py::PathGenerator *)pathgenp;
if (!paths->set(obj)) {
PyErr_SetString(PyExc_TypeError, "Not an iterable of paths");
return 0;
}
return 1;
}
int convert_clippath(PyObject *clippath_tuple, void *clippathp)
{
ClipPath *clippath = (ClipPath *)clippathp;
py::PathIterator path;
agg::trans_affine trans;
if (clippath_tuple != NULL && clippath_tuple != Py_None) {
if (!PyArg_ParseTuple(clippath_tuple,
"O&O&:clippath",
&convert_path,
&clippath->path,
&convert_trans_affine,
&clippath->trans)) {
return 0;
}
}
return 1;
}
int convert_snap(PyObject *obj, void *snapp)
{
e_snap_mode *snap = (e_snap_mode *)snapp;
if (obj == NULL || obj == Py_None) {
*snap = SNAP_AUTO;
} else {
switch (PyObject_IsTrue(obj)) {
case 0: *snap = SNAP_FALSE; break;
case 1: *snap = SNAP_TRUE; break;
default: return 0; // errored.
}
}
return 1;
}
int convert_sketch_params(PyObject *obj, void *sketchp)
{
SketchParams *sketch = (SketchParams *)sketchp;
if (obj == NULL || obj == Py_None) {
sketch->scale = 0.0;
} else if (!PyArg_ParseTuple(obj,
"ddd:sketch_params",
&sketch->scale,
&sketch->length,
&sketch->randomness)) {
return 0;
}
return 1;
}
int convert_gcagg(PyObject *pygc, void *gcp)
{
GCAgg *gc = (GCAgg *)gcp;
if (!(convert_from_attr(pygc, "_linewidth", &convert_double, &gc->linewidth) &&
convert_from_attr(pygc, "_alpha", &convert_double, &gc->alpha) &&
convert_from_attr(pygc, "_forced_alpha", &convert_bool, &gc->forced_alpha) &&
convert_from_attr(pygc, "_rgb", &convert_rgba, &gc->color) &&
convert_from_attr(pygc, "_antialiased", &convert_bool, &gc->isaa) &&
convert_from_attr(pygc, "_capstyle", &convert_cap, &gc->cap) &&
convert_from_attr(pygc, "_joinstyle", &convert_join, &gc->join) &&
convert_from_method(pygc, "get_dashes", &convert_dashes, &gc->dashes) &&
convert_from_attr(pygc, "_cliprect", &convert_rect, &gc->cliprect) &&
convert_from_method(pygc, "get_clip_path", &convert_clippath, &gc->clippath) &&
convert_from_method(pygc, "get_snap", &convert_snap, &gc->snap_mode) &&
convert_from_method(pygc, "get_hatch_path", &convert_path, &gc->hatchpath) &&
convert_from_method(pygc, "get_hatch_color", &convert_rgba, &gc->hatch_color) &&
convert_from_method(pygc, "get_hatch_linewidth", &convert_double, &gc->hatch_linewidth) &&
convert_from_method(pygc, "get_sketch_params", &convert_sketch_params, &gc->sketch))) {
return 0;
}
return 1;
}
int convert_face(PyObject *color, GCAgg &gc, agg::rgba *rgba)
{
if (!convert_rgba(color, rgba)) {
return 0;
}
if (color != NULL && color != Py_None) {
if (gc.forced_alpha || PySequence_Size(color) == 3) {
rgba->a = gc.alpha;
}
}
return 1;
}
int convert_points(PyObject *obj, void *pointsp)
{
numpy::array_view<double, 2> *points = (numpy::array_view<double, 2> *)pointsp;
if (obj == NULL || obj == Py_None) {
return 1;
}
points->set(obj);
if (points->size() == 0) {
return 1;
}
if (points->dim(1) != 2) {
PyErr_Format(PyExc_ValueError,
"Points must be Nx2 array, got %" NPY_INTP_FMT "x%" NPY_INTP_FMT,
points->dim(0), points->dim(1));
return 0;
}
return 1;
}
int convert_transforms(PyObject *obj, void *transp)
{
numpy::array_view<double, 3> *trans = (numpy::array_view<double, 3> *)transp;
if (obj == NULL || obj == Py_None) {
return 1;
}
trans->set(obj);
if (trans->size() == 0) {
return 1;
}
if (trans->dim(1) != 3 || trans->dim(2) != 3) {
PyErr_Format(PyExc_ValueError,
"Transforms must be Nx3x3 array, got %" NPY_INTP_FMT "x%" NPY_INTP_FMT "x%" NPY_INTP_FMT,
trans->dim(0), trans->dim(1), trans->dim(2));
return 0;
}
return 1;
}
int convert_bboxes(PyObject *obj, void *bboxp)
{
numpy::array_view<double, 3> *bbox = (numpy::array_view<double, 3> *)bboxp;
if (obj == NULL || obj == Py_None) {
return 1;
}
bbox->set(obj);
if (bbox->size() == 0) {
return 1;
}
if (bbox->dim(1) != 2 || bbox->dim(2) != 2) {
PyErr_Format(PyExc_ValueError,
"Bbox array must be Nx2x2 array, got %" NPY_INTP_FMT "x%" NPY_INTP_FMT "x%" NPY_INTP_FMT,
bbox->dim(0), bbox->dim(1), bbox->dim(2));
return 0;
}
return 1;
}
int convert_colors(PyObject *obj, void *colorsp)
{
numpy::array_view<double, 2> *colors = (numpy::array_view<double, 2> *)colorsp;
if (obj == NULL || obj == Py_None) {
return 1;
}
colors->set(obj);
if (colors->size() == 0) {
return 1;
}
if (colors->dim(1) != 4) {
PyErr_Format(PyExc_ValueError,
"Colors array must be Nx4 array, got %" NPY_INTP_FMT "x%" NPY_INTP_FMT,
colors->dim(0), colors->dim(1));
return 0;
}
return 1;
}
}