skia-python/src/skia/Point.cpp at main · skia-python/skia-python · GitHub

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#include "common.h"

#include <include/core/SkPoint3.h>

#include <pybind11/operators.h>

void initPoint(py::module &m) {

// IPoint

py::class_<SkIPoint>(m, "IPoint", R"docstring(

:py:class:`IPoint` holds two 32-bit integer coordinates.

Example::

point = skia.IPoint(0, 0)

point = skia.IPoint((0, 0)) # Convert from tuple

print(point.fX, point.fY)

point + (1, 1) # Add offset

point - (0, 0) # Subtract offset

x, y = tuple(point) # Convert to tuple

)docstring")

.def(py::init(&SkIPoint::Make),

R"docstring(

Sets fX to x, fY to y.

:x: integer x-axis value of constructed :py:class:`IPoint`

:y: integer y-axis value of constructed :py:class:`IPoint`

)docstring",

py::arg("x"), py::arg("y"))

.def(py::init(

[] (py::tuple t) {

if (t.size() != 2)

throw py::value_error("IPoint must have exactly two elements.");

return SkIPoint::Make(t[0].cast<int32_t>(), t[1].cast<int32_t>());

}),

py::arg("t"))

.def("x", &SkIPoint::x,

R"docstring(

Returns x-axis value of :py:class:`IPoint`.

)docstring")

.def("y", &SkIPoint::y,

R"docstring(

Returns y-axis value of :py:class:`IPoint`.

)docstring")

.def("isZero", &SkIPoint::isZero,

R"docstring(

Returns true if fX and fY are both zero.

)docstring")

.def("set", &SkIPoint::set,

R"docstring(

Sets fX to x and fY to y.

)docstring",

py::arg("x"), py::arg("y"))

.def(-py::self,

R"docstring(

Returns :py:class:`IPoint` changing the signs of fX and fY.

)docstring")

.def("__iadd__", [] (SkIPoint& p, const SkIPoint& v) { p += v; return p; },

R"docstring(

Offsets :py:class:`IPoint` by ivector v.

Sets :py:class:`IPoint` to ``(fX + v.fX, fY + v.fY)``.

)docstring",

py::arg("v"), py::is_operator())

.def("__isub__", [] (SkIPoint& p, const SkIPoint& v) { p -= v; return p; },

R"docstring(

Returns :py:class:`IPoint` changing the signs of fX and fY.

)docstring",

py::arg("v"), py::is_operator())

.def("equals", &SkIPoint::equals,

R"docstring(

Returns true if :py:class:`IPoint` is equivalent to :py:class:`IPoint`

constructed from (x, y).

:param x: value compared with fX

:param y: value compared with fY

)docstring",

py::arg("x"), py::arg("y"))

.def_static("Make", &SkIPoint::Make,

R"docstring(

Sets fX to x, fY to y.

:param x: integer x-axis value of constructed :py:class:`IPoint`

:param y: integer y-axis value of constructed :py:class:`IPoint`

:return: :py:class:`IPoint` (x, y)

)docstring",

py::arg("x"), py::arg("y"))

.def_readwrite("fX", &SkIPoint::fX, "x-axis value")

.def_readwrite("fY", &SkIPoint::fY, "y-axis value")

.def(py::self == py::self,

R"docstring(

Returns true if a is equivalent to b.

:param other: :py:class:`IPoint` to compare

:return: true if self.fX == other.fX and self.fY == other.fY

)docstring",

py::arg("other"))

.def(py::self != py::self,

R"docstring(

Returns true if a is not equivalent to b.

:param other: :py:class:`IPoint` to compare

:return: true if a.fX != b.fX or a.fY != b.fY

)docstring",

py::arg("other"))

.def(py::self - py::self,

R"docstring(

Returns ivector from other to self; computed as (self.fX - other.fX,

self.fY - other.fY).

Can also be used to subtract ivector from ivector, returning ivector.

:param other: ivector to subtract

:return: ivector from other to self

)docstring",

py::arg("other"))

.def(py::self + py::self,

R"docstring(

Returns :py:class:`IPoint` resulting from :py:class:`IPoint` self offset

by ivector other, computed as: (self.fX + other.fX, self.fY + other.fY).

Can also be used to offset :py:class:`IPoint` other by ivector self,

returning :py:class:`IPoint`. Can also be used to add ivector to

ivector, returning ivector.

:param other: :py:class:`IPoint` or ivector to add

:return: :py:class:`IPoint` equal to self offset by other

)docstring",

py::arg("other"))

.def("__iter__",

[] (const SkIPoint& p) {

return py::make_iterator(&p.fX, &p.fX + 2);

}, py::keep_alive<0, 1>())

.def("__len__", [] (const SkIPoint& p) { return 2; })

.def("__repr__",

[] (const SkIPoint& p) {

std::stringstream s;

s << "IPoint(" << p.fX << ", " << p.fY << ")";

return s.str();

})

;

py::implicitly_convertible<py::tuple, SkIPoint>();

// Point

py::class_<SkPoint>(m, "Point", R"docstring(

:py:class:`Point` holds two 32-bit floating point coordinates.

Example::

point = skia.Point(0.0, 0.0)

point = skia.Point((0.0, 0.0)) # Convert from tuple

print(point.fX, point.fY)

point + (1, 1) # Add offset

point - (0, 0) # Subtract offset

point * 2.0 # Scale

x, y = tuple(point) # Convert to tuple

)docstring")

.def(py::init(&SkPoint::Make),

R"docstring(

Sets fX to x, fY to y.

Used both to set :py:class:`Point` and vector.

:param float x: :py:class:`Scalar` x-axis value of constructed

:py:class:`Point` or vector

:param float y: :py:class:`Scalar` y-axis value of constructed

:py:class:`Point` or vector

:return: :py:class:`Point` (x, y)

)docstring",

py::arg("x"), py::arg("y"))

.def(py::init(

[] (const SkIPoint& p) { return SkPoint::Make(p.fX, p.fY); }),

py::arg("ipoint"))

.def(py::init(

[] (py::tuple t) {

if (t.size() != 2)

throw py::value_error("Point must have exactly two elements.");

return SkPoint::Make(t[0].cast<SkScalar>(), t[1].cast<SkScalar>());

}),

py::arg("t"))

.def("x", &SkPoint::x,

R"docstring(

Returns x-axis value of :py:class:`Point` or vector.

)docstring")

.def("y", &SkPoint::y,

R"docstring(

Returns y-axis value of :py:class:`Point` or vector.

)docstring")

.def("isZero", &SkPoint::isZero,

R"docstring(

Returns true if fX and fY are both zero.

:return: true if fX is zero and fY is zero

)docstring")

.def("set", &SkPoint::set,

R"docstring(

Sets fX to x and fY to y.

:param x: new value for fX

:param y: new value for fY

)docstring",

py::arg("x"), py::arg("y"))

.def("iset", py::overload_cast<int32_t, int32_t>(&SkPoint::iset),

R"docstring(

Sets fX to x and fY to y, promoting integers to SkScalar values.

Assigning a large integer value directly to fX or fY may cause a

compiler error, triggered by narrowing conversion of int to SkScalar.

This safely casts x and y to avoid the error.

:x: new value for fX

:y: new value for fY

)docstring",

py::arg("x"), py::arg("y"))

.def("iset", py::overload_cast<const SkIPoint&>(&SkPoint::iset),

R"docstring(

Sets fX to p.fX and fY to p.fY, promoting integers to SkScalar values.

Assigning an :py:class:`IPoint` containing a large integer value

directly to fX or fY may cause a compiler error, triggered by narrowing

conversion of int to SkScalar. This safely casts p.fX and p.fY to avoid

the error.

:p: :py:class:`IPoint` members promoted to SkScalar

)docstring",

py::arg("p"))

.def("setAbs", &SkPoint::setAbs,

R"docstring(

Sets fX to absolute value of pt.fX; and fY to absolute value of pt.fY.

:param pt: members providing magnitude for fX and fY

)docstring",

py::arg("pt"))

.def("offset", &SkPoint::offset,

R"docstring(

Adds offset (dx, dy) to :py:class:`Point`.

:param dx: added to fX

:param dy: added to fY

)docstring",

py::arg("dx"), py::arg("dy"))

.def("length", &SkPoint::length,

R"docstring(

Returns the Euclidean distance from origin, computed as:

sqrt(fX * fX + fY * fY)

:return: straight-line distance to origin

)docstring")

.def("distanceToOrigin", &SkPoint::distanceToOrigin,

R"docstring(

Returns the Euclidean distance from origin, computed as:

sqrt(fX * fX + fY * fY)

:return: straight-line distance to origin

)docstring")

.def("normalize", &SkPoint::normalize,

R"docstring(

Scales (fX, fY) so that :py:meth:`length` returns one, while preserving

ratio of fX to fY, if possible.

If prior length is nearly zero, sets vector to (0, 0) and returns false;

otherwise returns true.

:return: true if former length is not zero or nearly zero

)docstring")

.def("setNormalize", &SkPoint::setNormalize,

R"docstring(

Sets vector to (x, y) scaled so :py:meth:`length` returns one, and so

that (fX, fY) is proportional to (x, y).

If (x, y) length is nearly zero, sets vector to (0, 0) and returns

false; otherwise returns true.

:param x: proportional value for fX

:param y: proportional value for fY

:return: true if (x, y) length is not zero or nearly zero

)docstring",

py::arg("x"), py::arg("y"))

.def("setLength", py::overload_cast<SkScalar>(&SkPoint::setLength),

R"docstring(

Scales vector so that :py:meth:`distanceToOrigin` returns length, if

possible.

If former length is nearly zero, sets vector to (0, 0) and return false;

otherwise returns true.

:length: straight-line distance to origin

:return: true if former length is not zero or nearly zero

)docstring",

py::arg("length"))

.def("setLength",

py::overload_cast<SkScalar, SkScalar, SkScalar>(&SkPoint::setLength),

R"docstring(

Sets vector to (x, y) scaled to length, if possible.

If former length is nearly zero, sets vector to (0, 0) and return false;

otherwise returns true.

:x: proportional value for fX

:y: proportional value for fY

:length: straight-line distance to origin

:return: true if (x, y) length is not zero or nearly zero

)docstring",

py::arg("x"), py::arg("y"), py::arg("length"))

.def("scale",

[] (const SkPoint& p, SkScalar scale) {

SkPoint dst;

p.scale(scale, &dst);

return dst;

R"docstring(

Sets dst to :py:class:`Point` times scale.

dst may be :py:class:`Point` to modify :py:class:`Point` in place.

It is also possible to use operators::

p * scale

p *= scale # in-place

:param scale: factor to multiply :py:class:`Point` by

)docstring",

py::arg("scale"))

.def("negate", &SkPoint::negate,

R"docstring(

Changes the sign of fX and fY.

)docstring")

.def(-py::self,

R"docstring(

Returns :py:class:`Point` changing the signs of fX and fY.

)docstring")

.def("__iadd__", [](SkPoint& p, const SkPoint& v) { p += v; return p; },

R"docstring(

Adds vector v to :py:class:`Point`.

Sets :py:class:`Point` to: (fX + v.fX, fY + v.fY).

:param v: vector to add

)docstring",

py::arg("v"))

.def("__isub__", [](SkPoint& p, const SkPoint& v) { p -= v; return p; },

R"docstring(

Subtracts vector v from :py:class:`Point`.

Sets :py:class:`Point` to: (fX - v.fX, fY - v.fY).

:param v: vector to subtract

)docstring",

py::arg("v"))

.def(py::self * SkScalar(),

R"docstring(

Returns :py:class:`Point` multiplied by scale.

)docstring",

py::arg("scale"))

.def(py::self *= SkScalar(),

R"docstring(

Multiplies :py:class:`Point` by scale.

Sets :py:class:`Point` to: (fX * scale, fY * scale).

:param scale: scalar to multiply by

:return: reference to :py:class:`Point`

)docstring",

py::arg("scale"))

.def("isFinite", &SkPoint::isFinite,

R"docstring(

Returns true if both fX and fY are measurable values.

:return: true for values other than infinities and NaN

)docstring")

.def("equals", &SkPoint::equals,

R"docstring(

Returns true if :py:class:`Point` is equivalent to :py:class:`Point`

constructed from (x, y).

:param x: value compared with fX

:param y: value compared with fY

:return: true if :py:class:`Point` equals (x, y)

)docstring",

py::arg("x"), py::arg("y"))

.def("cross", &SkPoint::cross,

R"docstring(

Returns the cross product of vector and vec.

Vector and vec form three-dimensional vectors with z-axis value equal to

zero. The cross product is a three-dimensional vector with x-axis and

y-axis values equal to zero. The cross product z-axis component is

returned.

:param vec: right side of cross product

:return: area spanned by vectors signed by angle direction

)docstring",

py::arg("vec"))

.def("dot", &SkPoint::dot,

R"docstring(

Returns the dot product of vector and vector vec.

:param vec: right side of dot product

:return: product of input magnitudes and cosine of the angle between

them

)docstring",

py::arg("vec"))

.def_static("Make", &SkPoint::Make,

R"docstring(

Sets fX to x, fY to y.

Used both to set :py:class:`Point` and vector.

:param x: Scalar x-axis value of constructed :py:class:`Point` or vector

:param y: Scalar y-axis value of constructed :py:class:`Point` or vector

:return: :py:class:`Point` (x, y)

)docstring",

py::arg("x"), py::arg("y"))

.def_static("Offset",

[] (std::vector<SkPoint>& points, const SkVector& offset) {

SkPoint::Offset(&points[0], points.size(), offset);

return points;

R"docstring(

Adds offset to each :py:class:`Point` in points array with count

entries.

:points: :py:class:`Point` array

:offset: vector added to points

:return: :py:class:`Point` array applied offset

)docstring",

py::arg("points"), py::arg("offset"))

.def_static("Offset",

[] (std::vector<SkPoint>& points, SkScalar dx, SkScalar dy) {

SkPoint::Offset(&points[0], points.size(), dx, dy);

return points;

R"docstring(

Adds offset (dx, dy) to each :py:class:`Point` in points array of length

count.

:points: :py:class:`Point` array

:dx: added to fX in points

:dy: added to fY in points

)docstring",

py::arg("points"), py::arg("dx"), py::arg("dy"))

.def_static("Length", &SkPoint::Length,

R"docstring(

Returns the Euclidean distance from origin, computed as:

sqrt(x * x + y * y)

:param x: component of length

:param y: component of length

:return: straight-line distance to origin

)docstring",

py::arg("x"), py::arg("y"))

.def_static("Normalize", &SkPoint::Normalize,

R"docstring(

Scales (vec->fX, vec->fY) so that length() returns one, while preserving

ratio of vec->fX to vec->fY, if possible.

If original length is nearly zero, sets vec to (0, 0) and returns zero;

otherwise, returns length of vec before vec is scaled.

Returned prior length may be SK_ScalarInfinity if it can not be

represented by SkScalar.

Note that :py:meth:`normalize` is faster if prior length is not

required.

:param vec: normalized to unit length

:return: original vec length

)docstring",

py::arg("vec"))

.def_static("Distance", &SkPoint::Distance,

R"docstring(

Returns the Euclidean distance between a and b.

:param a: line end point

:param b: line end point

:return: straight-line distance from a to b

)docstring",

py::arg("a"), py::arg("b"))

.def_static("DotProduct", &SkPoint::DotProduct,

R"docstring(

Returns the dot product of vector a and vector b.

:param a: left side of dot product

:param b: right side of dot product

:return: product of input magnitudes and cosine of the angle between

them

)docstring",

py::arg("a"), py::arg("b"))

.def_static("CrossProduct", &SkPoint::CrossProduct,

R"docstring(

Returns the cross product of vector a and vector b.

a and b form three-dimensional vectors with z-axis value equal to zero.

The cross product is a three-dimensional vector with x-axis and y-axis

values equal to zero. The cross product z-axis component is returned.

:param a: left side of cross product

:param b: right side of cross product

:return: area spanned by vectors signed by angle direction

)docstring",

py::arg("a"), py::arg("b"))

.def_readwrite("fX", &SkPoint::fX, "x-axis value")

.def_readwrite("fY", &SkPoint::fY, "y-axis value")

.def(py::self == py::self,

R"docstring(

Returns true if self is not equivalent to other.

:param other: :py:class:`Point` to compare

:return: true if self.fX == other.fX and self.fY == other.fY

)docstring",

py::arg("other"))

.def(py::self != py::self,

R"docstring(

Returns true if self is equivalent to other.

:param other: :py:class:`Point` to compare

:return: true if self.fX != other.fX or self.fY != other.fY

)docstring",

py::arg("other"))

.def(py::self - py::self,

R"docstring(

Returns vector from other to self, computed as (self.fX - other.fX,

self.fY - other.fY).

Can also be used to subtract vector from :py:class:`Point`, returning

:py:class:`Point`. Can also be used to subtract vector from vector,

returning vector.

:param other: :py:class:`Point` to subtract

:return: vector from other to self

)docstring",

py::arg("other"))

.def(py::self + py::self,

R"docstring(

Returns :py:class:`Point` resulting from :py:class:`Point` self offset

by vector other, computed as: (self.fX + other.fX, self.fY + other.fY).

Can also be used to offset :py:class:`Point` other by vector self,

returning :py:class:`Point`. Can also be used to add vector to vector,

returning vector.

:param other: :py:class:`Point` or vector to add

:return: :py:class:`Point` equal to self offset by other

)docstring",

py::arg("other"))

.def("__iter__",

[] (const SkPoint& p) {

return py::make_iterator(&p.fX, &p.fX + 2);

}, py::keep_alive<0, 1>())

.def("__len__", [] (const SkPoint& p) { return 2; })

.def("__repr__",

[] (const SkPoint& p) {

std::stringstream s;

s << "Point(" << p.fX << ", " << p.fY << ")";

return s.str();

})

;

py::implicitly_convertible<py::tuple, SkPoint>();

py::implicitly_convertible<SkIPoint, SkPoint>();

// Point3

py::class_<SkPoint3>(m, "Point3",

R"docstring(

:py:class:`Point` holds three 32-bit floating point coordinates.

Example::

point = skia.Point3(0.0, 0.0, 0.0)

point = skia.Point3((0.0, 0.0, 0.0)) # Convert from tuple

print(point.fX, point.fY, point.fZ)

x, y, z = tuple(point) # Convert to tuple

)docstring")

.def(py::init(&SkPoint3::Make),

py::arg("x"), py::arg("y"), py::arg("z"))

.def(py::init(

[] (py::tuple t) {

if (t.size() != 3)

throw py::value_error("Point3 must have exactly 3 elements.");

return SkPoint3::Make(

t[0].cast<SkScalar>(),

t[1].cast<SkScalar>(),

t[2].cast<SkScalar>());

}),

py::arg("t"))

.def("x", &SkPoint3::x)

.def("y", &SkPoint3::y)

.def("z", &SkPoint3::z)

.def("set", &SkPoint3::set, py::arg("x"), py::arg("y"), py::arg("z"))

.def("length", &SkPoint3::length,

R"docstring(

Return the Euclidian distance from (0,0,0) to the point.

)docstring")

.def("normalize", &SkPoint3::normalize,

R"docstring(

Set the point (vector) to be unit-length in the same direction as it

already points.

If the point has a degenerate length (i.e., nearly 0) then set it to

(0,0,0) and return false; otherwise return true.

)docstring")

.def("makeScale", &SkPoint3::makeScale,

R"docstring(

Return a new point whose X, Y and Z coordinates are scaled.

)docstring",

py::arg("scale"))

.def("scale", &SkPoint3::scale,

R"docstring(

Scale the point's coordinates by scale.

)docstring",

py::arg("scale"))

.def(-py::self,

R"docstring(

Return a new point whose X, Y and Z coordinates are the negative of the

original point's.

)docstring")

.def("__iadd__", [] (SkPoint3& p, const SkPoint3& v) { p += v; return p; },

R"docstring(

Add v's coordinates to the point's.

)docstring",

py::arg("v"), py::is_operator())

.def("__isub__", [] (SkPoint3& p, const SkPoint3& v) { p -= v; return p; },

R"docstring(

Subtract v's coordinates from the point's.

)docstring",

py::arg("v"), py::is_operator())

.def("isFinite", &SkPoint3::isFinite,

"Returns true if fX, fY, and fZ are measurable values.")

.def("dot", &SkPoint3::dot, py::arg("vec"))

.def("cross", &SkPoint3::cross, py::arg("vec"))

.def_static("Make", &SkPoint3::Make,

py::arg("x"), py::arg("y"), py::arg("z"))

.def_static("Length", &SkPoint3::Length,

R"docstring(

Returns the Euclidian distance from (0,0,0) to (x,y,z)

)docstring",

py::arg("x"), py::arg("y"), py::arg("z"))

.def_static("DotProduct", &SkPoint3::DotProduct,

R"docstring(

Returns the dot product of a and b, treating them as 3D vectors.

)docstring",

py::arg("a"), py::arg("b"))

.def_static("CrossProduct", &SkPoint3::CrossProduct,

R"docstring(

Returns the cross product of a and b, treating them as 3D vectors.

)docstring",

py::arg("a"), py::arg("b"))

.def_readwrite("fX", &SkPoint3::fX, "x-axis value")

.def_readwrite("fY", &SkPoint3::fY, "y-axis value")

.def_readwrite("fZ", &SkPoint3::fZ, "z-axis value")

.def(py::self == py::self, py::arg("other"))

.def(py::self != py::self, py::arg("other"))

.def(py::self - py::self,

R"docstring(

Returns a new point whose coordinates are the difference between a and b

(i.e., a - b)

)docstring",

py::arg("other"))

.def(py::self + py::self,

R"docstring(

Returns a new point whose coordinates are the sum of a and b (a + b)

)docstring",

py::arg("other"))

.def(SkScalar() * py::self, py::arg("scale"))

.def("__iter__",

[] (const SkPoint3& p) {

return py::make_iterator(&p.fX, &p.fX + 3);

}, py::keep_alive<0, 1>())

.def("__len__", [] (const SkPoint3& p) { return 3; })

.def("__repr__",

[] (const SkPoint3& p) {

std::stringstream s;

s << "Point3(" << p.fX << ", " << p.fY << ", " << p.fZ << ")";

return s.str();

})

;

py::implicitly_convertible<py::tuple, SkPoint3>();

}

skia-python/src/skia/Point.cpp at main · skia-python/skia-python · GitHub

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