cf8ed52895
Consolidate parsing utils into their own CU. TBR= Change-Id: Idbf6db5220135ba91df6ebefce3a241c6ec4af15 Reviewed-on: https://skia-review.googlesource.com/99721 Reviewed-by: Florin Malita <fmalita@chromium.org> Commit-Queue: Florin Malita <fmalita@chromium.org>
161 lines
3.5 KiB
C++
161 lines
3.5 KiB
C++
/*
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* Copyright 2018 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkottieParser.h"
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#include "SkJSONCPP.h"
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#include "SkScalar.h"
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#include "SkPath.h"
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#include "SkPoint.h"
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#include "SkString.h"
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#include <vector>
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namespace skottie {
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template <>
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bool Parse<SkScalar>(const Json::Value& jv, SkScalar* v) {
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// Some versions wrap values as single-element arrays.
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if (jv.isArray() && jv.size() == 1) {
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return Parse(jv[0], v);
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}
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if (jv.isNull() || !jv.isConvertibleTo(Json::realValue))
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return false;
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*v = jv.asFloat();
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return true;
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}
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template <>
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bool Parse<bool>(const Json::Value& jv, bool* v) {
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if (jv.isNull() || !jv.isConvertibleTo(Json::booleanValue))
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return false;
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*v = jv.asBool();
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return true;
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}
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template <>
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bool Parse<int>(const Json::Value& jv, int* v) {
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if (jv.isNull() || !jv.isConvertibleTo(Json::intValue))
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return false;
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*v = jv.asInt();
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return true;
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}
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template <>
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bool Parse<SkString>(const Json::Value& jv, SkString* v) {
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if (jv.isNull() || !jv.isConvertibleTo(Json::stringValue))
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return false;
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v->set(jv.asCString());
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return true;
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}
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template <>
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bool Parse<SkPoint>(const Json::Value& jv, SkPoint* v) {
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if (!jv.isObject())
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return false;
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const auto& jvx = jv["x"],
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jvy = jv["y"];
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// Some BM versions seem to store x/y as single-element arrays.
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return Parse(jvx.isArray() ? jvx[0] : jvx, &v->fX)
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&& Parse(jvy.isArray() ? jvy[0] : jvy, &v->fY);
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}
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template <>
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bool Parse<std::vector<float>>(const Json::Value& jv, std::vector<float>* v) {
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if (!jv.isArray())
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return false;
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v->resize(jv.size());
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for (Json::ArrayIndex i = 0; i < jv.size(); ++i) {
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if (!Parse(jv[i], v->data() + i)) {
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return false;
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}
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}
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return true;
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}
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namespace {
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bool ParsePointVec(const Json::Value& jv, std::vector<SkPoint>* pts) {
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if (!jv.isArray())
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return false;
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pts->clear();
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pts->reserve(jv.size());
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std::vector<float> vec;
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for (Json::ArrayIndex i = 0; i < jv.size(); ++i) {
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if (!Parse(jv[i], &vec) || vec.size() != 2)
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return false;
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pts->push_back(SkPoint::Make(vec[0], vec[1]));
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}
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return true;
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}
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} // namespace
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template <>
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bool Parse<SkPath>(const Json::Value& jv, SkPath* v) {
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SkASSERT(v->isEmpty());
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// Some versions wrap values as single-element arrays.
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if (jv.isArray() && jv.size() == 1) {
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return Parse(jv[0], v);
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}
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std::vector<SkPoint> inPts, // Cubic Bezier "in" control points, relative to vertices.
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outPts, // Cubic Bezier "out" control points, relative to vertices.
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verts; // Cubic Bezier vertices.
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if (!jv.isObject() ||
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!ParsePointVec(jv["i"], &inPts) ||
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!ParsePointVec(jv["o"], &outPts) ||
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!ParsePointVec(jv["v"], &verts) ||
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inPts.size() != outPts.size() ||
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inPts.size() != verts.size()) {
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return false;
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}
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if (!verts.empty()) {
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v->moveTo(verts.front());
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}
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const auto& addCubic = [&](size_t from, size_t to) {
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v->cubicTo(verts[from] + outPts[from],
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verts[to] + inPts[to],
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verts[to]);
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};
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for (size_t i = 1; i < verts.size(); ++i) {
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addCubic(i - 1, i);
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}
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if (!verts.empty() && ParseDefault(jv["c"], false)) {
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addCubic(verts.size() - 1, 0);
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v->close();
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}
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return true;
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}
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} // nasmespace skottie
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