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/*
* Copyright 2018 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkottieJson.h"
#include "SkData.h"
#include "SkScalar.h"
#include "SkPath.h"
#include "SkPoint.h"
#include "SkStream.h"
#include "SkString.h"
#include "SkottieValue.h"
#include <vector>
namespace skottie {
using namespace skjson;
template <>
bool Parse<SkScalar>(const Value& v, SkScalar* s) {
// Some versions wrap values as single-element arrays.
if (const skjson::ArrayValue* array = v) {
if (array->size() > 0) {
return Parse((*array)[0], s);
}
}
if (const skjson::NumberValue* num = v) {
*s = static_cast<SkScalar>(**num);
return true;
}
return false;
}
template <>
bool Parse<bool>(const Value& v, bool* b) {
switch(v.getType()) {
case Value::Type::kNumber:
*b = SkToBool(*v.as<NumberValue>());
return true;
case Value::Type::kBool:
*b = *v.as<BoolValue>();
return true;
default:
break;
}
return false;
}
template <>
bool Parse<int>(const Value& v, int* i) {
if (const skjson::NumberValue* num = v) {
const auto dbl = **num;
*i = dbl;
return *i == dbl;
}
return false;
}
template <>
bool Parse<SkString>(const Value& v, SkString* s) {
if (const skjson::StringValue* sv = v) {
s->set(sv->begin(), sv->size());
return true;
}
return false;
}
template <>
bool Parse<SkPoint>(const Value& v, SkPoint* pt) {
if (!v.is<ObjectValue>())
return false;
const auto& ov = v.as<ObjectValue>();
return Parse<SkScalar>(ov["x"], &pt->fX)
&& Parse<SkScalar>(ov["y"], &pt->fY);
}
template <>
bool Parse<std::vector<float>>(const Value& v, std::vector<float>* vec) {
if (!v.is<ArrayValue>())
return false;
const auto& av = v.as<ArrayValue>();
vec->resize(av.size());
for (size_t i = 0; i < av.size(); ++i) {
if (!Parse(av[i], vec->data() + i)) {
return false;
}
}
return true;
}
namespace {
bool ParsePointVec(const Value& v, std::vector<SkPoint>* pts) {
if (!v.is<ArrayValue>())
return false;
const auto& av = v.as<ArrayValue>();
pts->clear();
pts->reserve(av.size());
std::vector<float> vec;
for (size_t i = 0; i < av.size(); ++i) {
if (!Parse(av[i], &vec) || vec.size() != 2)
return false;
pts->push_back(SkPoint::Make(vec[0], vec[1]));
}
return true;
}
} // namespace
template <>
bool Parse<ShapeValue>(const Value& v, ShapeValue* sh) {
SkASSERT(sh->fVertices.empty());
// Some versions wrap values as single-element arrays.
if (const skjson::ArrayValue* av = v) {
if (av->size() == 1) {
return Parse((*av)[0], sh);
}
}
if (!v.is<skjson::ObjectValue>())
return false;
const auto& ov = v.as<ObjectValue>();
std::vector<SkPoint> inPts, // Cubic Bezier "in" control points, relative to vertices.
outPts, // Cubic Bezier "out" control points, relative to vertices.
verts; // Cubic Bezier vertices.
if (!ParsePointVec(ov["i"], &inPts) ||
!ParsePointVec(ov["o"], &outPts) ||
!ParsePointVec(ov["v"], &verts) ||
inPts.size() != outPts.size() ||
inPts.size() != verts.size()) {
return false;
}
sh->fVertices.reserve(inPts.size());
for (size_t i = 0; i < inPts.size(); ++i) {
sh->fVertices.push_back(BezierVertex({inPts[i], outPts[i], verts[i]}));
}
sh->fClosed = ParseDefault<bool>(ov["c"], false);
return true;
}
} // namespace skottie
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