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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkottyProperties.h"
#include "SkColor.h"
#include "SkottyPriv.h"
#include "SkPath.h"
#include "SkSGTransform.h"
namespace skotty {
namespace {
using PointArray = SkSTArray<64, SkPoint, true>;
bool ParsePoints(const Json::Value& v, PointArray* pts) {
if (!v.isArray()) {
return false;
}
for (Json::ArrayIndex i = 0; i < v.size(); ++i) {
const auto& pt = v[i];
if (!pt.isArray() || pt.size() != 2 ||
!pt[0].isConvertibleTo(Json::realValue) ||
!pt[1].isConvertibleTo(Json::realValue)) {
return false;
}
pts->push_back(SkPoint::Make(ParseScalar(pt[0], 0), ParseScalar(pt[1], 0)));
}
return true;
}
} // namespace
bool ScalarValue::Parse(const Json::Value& v, ScalarValue* scalar) {
// Some files appear to wrap keyframes in arrays for no reason.
if (v.isArray() && v.size() == 1) {
return Parse(v[0], scalar);
}
if (v.isNull() || !v.isConvertibleTo(Json::realValue))
return false;
scalar->fVal = ParseScalar(v, 0);
return true;
}
bool VectorValue::Parse(const Json::Value& v, VectorValue* vec) {
SkASSERT(vec->fVals.empty());
if (!v.isArray())
return false;
for (Json::ArrayIndex i = 0; i < v.size(); ++i) {
const auto& el = v[i];
if (el.isNull() || !el.isConvertibleTo(Json::realValue))
return false;
vec->fVals.emplace_back(ParseScalar(el, 0));
}
return true;
}
bool ShapeValue::Parse(const Json::Value& v, ShapeValue* shape) {
PointArray inPts,
outPts,
verts;
// Some files appear to wrap keyframes in arrays for no reason.
if (v.isArray() && v.size() == 1) {
return Parse(v[0], shape);
}
if (!v.isObject() ||
!ParsePoints(v["i"], &inPts) ||
!ParsePoints(v["o"], &outPts) ||
!ParsePoints(v["v"], &verts) ||
inPts.count() != outPts.count() ||
inPts.count() != verts.count()) {
return false;
}
SkASSERT(shape->fVertices.empty());
for (int i = 0; i < inPts.count(); ++i) {
shape->fVertices.emplace_back(BezierVertex({inPts[i], outPts[i], verts[i]}));
}
shape->fClose = ParseBool(v["c"], false);
return true;
}
template <>
SkColor VectorValue::as<SkColor>() const {
// best effort to turn this into a color
const auto r = fVals.count() > 0 ? fVals[0].as<SkScalar>() : 0,
g = fVals.count() > 1 ? fVals[1].as<SkScalar>() : 0,
b = fVals.count() > 2 ? fVals[2].as<SkScalar>() : 0,
a = fVals.count() > 3 ? fVals[3].as<SkScalar>() : 1;
return SkColorSetARGB(SkTPin<SkScalar>(a, 0, 1) * 255,
SkTPin<SkScalar>(r, 0, 1) * 255,
SkTPin<SkScalar>(g, 0, 1) * 255,
SkTPin<SkScalar>(b, 0, 1) * 255);
}
template <>
SkPoint VectorValue::as<SkPoint>() const {
// best effort to turn this into a point
const auto x = fVals.count() > 0 ? fVals[0].as<SkScalar>() : 0,
y = fVals.count() > 1 ? fVals[1].as<SkScalar>() : 0;
return SkPoint::Make(x, y);
}
template <>
SkPath ShapeValue::as<SkPath>() const {
SkPath path;
if (!fVertices.empty()) {
path.moveTo(fVertices.front().fVertex);
}
const auto& addCubic = [](const BezierVertex& from, const BezierVertex& to, SkPath* path) {
path->cubicTo(from.fVertex + from.fOutPoint,
to.fVertex + to.fInPoint,
to.fVertex);
};
for (int i = 1; i < fVertices.count(); ++i) {
addCubic(fVertices[i - 1], fVertices[i], &path);
}
if (fClose) {
addCubic(fVertices.back(), fVertices.front(), &path);
path.close();
}
return path;
}
CompositeTransform::CompositeTransform(sk_sp<sksg::RenderNode> wrapped_node)
: fTransformNode(sksg::Transform::Make(std::move(wrapped_node), SkMatrix::I())) {}
void CompositeTransform::apply() {
SkMatrix t = SkMatrix::MakeTrans(-fAnchorPoint.x(), -fAnchorPoint.y());
t.postScale(fScale.x() / 100, fScale.y() / 100); // 100% based
t.postRotate(fRotation);
t.postTranslate(fPosition.x(), fPosition.y());
// TODO: skew
fTransformNode->setMatrix(t);
}
} // namespace skotty
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