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thorvg/src/loaders/lottie/tvgLottieParser.cpp
Hermet Park e34ba91ff1 lottie: code refactoring 
removed a unused parameter.
2024-12-12 13:38:55 +09:00

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/*
* Copyright (c) 2023 - 2024 the ThorVG project. All rights reserved.
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "tvgStr.h"
#include "tvgCompressor.h"
#include "tvgLottieModel.h"
#include "tvgLottieParser.h"
#include "tvgLottieExpressions.h"
/************************************************************************/
/* Internal Class Implementation */
/************************************************************************/
#define KEY_AS(name) !strcmp(key, name)
static LottieExpression* _expression(char* code, LottieComposition* comp, LottieLayer* layer, LottieObject* object, LottieProperty* property)
{
if (!comp->expressions) comp->expressions = true;
auto inst = new LottieExpression;
inst->code = code;
inst->comp = comp;
inst->layer = layer;
inst->object = object;
inst->property = property;
return inst;
}
static unsigned long _int2str(int num)
{
char str[20];
snprintf(str, 20, "%d", num);
return djb2Encode(str);
}
LottieEffect* LottieParser::getEffect(int type)
{
switch (type) {
case 25: return new LottieDropShadow;
case 29: return new LottieGaussianBlur;
default: return nullptr;
}
}
MaskMethod LottieParser::getMaskMethod(bool inversed)
{
auto mode = getString();
if (!mode) return MaskMethod::None;
switch (mode[0]) {
case 'a': {
if (inversed) return MaskMethod::InvAlpha;
else return MaskMethod::Add;
}
case 's': return MaskMethod::Subtract;
case 'i': return MaskMethod::Intersect;
case 'f': return MaskMethod::Difference;
case 'l': return MaskMethod::Lighten;
case 'd': return MaskMethod::Darken;
default: return MaskMethod::None;
}
}
RGB24 LottieParser::getColor(const char *str)
{
RGB24 color = {0, 0, 0};
if (!str) return color;
auto len = strlen(str);
// some resource has empty color string, return a default color for those cases.
if (len != 7 || str[0] != '#') return color;
char tmp[3] = {'\0', '\0', '\0'};
tmp[0] = str[1];
tmp[1] = str[2];
color.rgb[0] = uint8_t(strtol(tmp, nullptr, 16));
tmp[0] = str[3];
tmp[1] = str[4];
color.rgb[1] = uint8_t(strtol(tmp, nullptr, 16));
tmp[0] = str[5];
tmp[1] = str[6];
color.rgb[2] = uint8_t(strtol(tmp, nullptr, 16));
return color;
}
FillRule LottieParser::getFillRule()
{
switch (getInt()) {
case 1: return FillRule::Winding;
default: return FillRule::EvenOdd;
}
}
MaskMethod LottieParser::getMatteType()
{
switch (getInt()) {
case 1: return MaskMethod::Alpha;
case 2: return MaskMethod::InvAlpha;
case 3: return MaskMethod::Luma;
case 4: return MaskMethod::InvLuma;
default: return MaskMethod::None;
}
}
StrokeCap LottieParser::getStrokeCap()
{
switch (getInt()) {
case 1: return StrokeCap::Butt;
case 2: return StrokeCap::Round;
default: return StrokeCap::Square;
}
}
StrokeJoin LottieParser::getStrokeJoin()
{
switch (getInt()) {
case 1: return StrokeJoin::Miter;
case 2: return StrokeJoin::Round;
default: return StrokeJoin::Bevel;
}
}
bool LottieParser::getValue(TextDocument& doc)
{
enterObject();
while (auto key = nextObjectKey()) {
if (KEY_AS("s")) doc.size = getFloat() * 0.01f;
else if (KEY_AS("f")) doc.name = getStringCopy();
else if (KEY_AS("t")) doc.text = getStringCopy();
else if (KEY_AS("j")) doc.justify = getInt();
else if (KEY_AS("ca")) doc.caps = getInt();
else if (KEY_AS("tr")) doc.tracking = getFloat() * 0.1f;
else if (KEY_AS("lh")) doc.height = getFloat();
else if (KEY_AS("ls")) doc.shift = getFloat();
else if (KEY_AS("fc")) getValue(doc.color);
else if (KEY_AS("ps")) getValue(doc.bbox.pos);
else if (KEY_AS("sz")) getValue(doc.bbox.size);
else if (KEY_AS("sc")) getValue(doc.stroke.color);
else if (KEY_AS("sw")) doc.stroke.width = getFloat();
else if (KEY_AS("of")) doc.stroke.render = getBool();
else skip();
}
return false;
}
bool LottieParser::getValue(PathSet& path)
{
Array<Point> outs, ins, pts;
bool closed = false;
/* The shape object could be wrapped by a array
if its part of the keyframe object */
auto arrayWrapper = (peekType() == kArrayType) ? true : false;
if (arrayWrapper) enterArray();
enterObject();
while (auto key = nextObjectKey()) {
if (KEY_AS("i")) getValue(ins);
else if (KEY_AS("o")) getValue(outs);
else if (KEY_AS("v")) getValue(pts);
else if (KEY_AS("c")) closed = getBool();
else skip();
}
//exit properly from the array
if (arrayWrapper) nextArrayValue();
//valid path data?
if (ins.empty() || outs.empty() || pts.empty()) return false;
if (ins.count != outs.count || outs.count != pts.count) return false;
//convert path
auto out = outs.begin();
auto in = ins.begin();
auto pt = pts.begin();
//Store manipulated results
Array<Point> outPts;
Array<PathCommand> outCmds;
//Reuse the buffers
outPts.data = path.pts;
outPts.reserved = path.ptsCnt;
outCmds.data = path.cmds;
outCmds.reserved = path.cmdsCnt;
size_t extra = closed ? 3 : 0;
outPts.reserve(pts.count * 3 + 1 + extra);
outCmds.reserve(pts.count + 2);
outCmds.push(PathCommand::MoveTo);
outPts.push(*pt);
for (++pt, ++out, ++in; pt < pts.end(); ++pt, ++out, ++in) {
outCmds.push(PathCommand::CubicTo);
outPts.push(*(pt - 1) + *(out - 1));
outPts.push(*pt + *in);
outPts.push(*pt);
}
if (closed) {
outPts.push(pts.last() + outs.last());
outPts.push(pts.first() + ins.first());
outPts.push(pts.first());
outCmds.push(PathCommand::CubicTo);
outCmds.push(PathCommand::Close);
}
path.pts = outPts.data;
path.cmds = outCmds.data;
path.ptsCnt = outPts.count;
path.cmdsCnt = outCmds.count;
outPts.data = nullptr;
outCmds.data = nullptr;
return false;
}
bool LottieParser::getValue(ColorStop& color)
{
if (peekType() == kArrayType) {
enterArray();
if (!nextArrayValue()) return true;
}
if (!color.input) color.input = new Array<float>(static_cast<LottieGradient*>(context.parent)->colorStops.count * 6);
else color.input->clear();
do color.input->push(getFloat());
while (nextArrayValue());
return true;
}
bool LottieParser::getValue(Array<Point>& pts)
{
enterArray();
while (nextArrayValue()) {
enterArray();
Point pt;
getValue(pt);
pts.push(pt);
}
return false;
}
bool LottieParser::getValue(int8_t& val)
{
if (peekType() == kArrayType) {
enterArray();
if (nextArrayValue()) val = getInt();
//discard rest
while (nextArrayValue()) getInt();
} else {
val = (int8_t) getFloat();
}
return false;
}
bool LottieParser::getValue(uint8_t& val)
{
if (peekType() == kArrayType) {
enterArray();
if (nextArrayValue()) val = (uint8_t)(getFloat() * 2.55f);
//discard rest
while (nextArrayValue()) getFloat();
} else {
val = (uint8_t)(getFloat() * 2.55f);
}
return false;
}
bool LottieParser::getValue(float& val)
{
if (peekType() == kArrayType) {
enterArray();
if (nextArrayValue()) val = getFloat();
//discard rest
while (nextArrayValue()) getFloat();
} else {
val = getFloat();
}
return false;
}
bool LottieParser::getValue(Point& pt)
{
if (peekType() == kNullType) return false;
if (peekType() == kArrayType) {
enterArray();
if (!nextArrayValue()) return false;
}
pt.x = getFloat();
pt.y = getFloat();
while (nextArrayValue()) getFloat(); //drop
return true;
}
bool LottieParser::getValue(RGB24& color)
{
if (peekType() == kArrayType) {
enterArray();
if (!nextArrayValue()) return false;
}
color.rgb[0] = REMAP255(getFloat());
color.rgb[1] = REMAP255(getFloat());
color.rgb[2] = REMAP255(getFloat());
while (nextArrayValue()) getFloat(); //drop
//TODO: color filter?
return true;
}
void LottieParser::getInterpolatorPoint(Point& pt)
{
enterObject();
while (auto key = nextObjectKey()) {
if (KEY_AS("x")) getValue(pt.x);
else if (KEY_AS("y")) getValue(pt.y);
}
}
template<LottieProperty::Type type, typename T>
void LottieParser::parseSlotProperty(T& prop)
{
while (auto key = nextObjectKey()) {
if (KEY_AS("p")) parseProperty<type>(prop);
else skip();
}
}
template<typename T>
bool LottieParser::parseTangent(const char *key, LottieVectorFrame<T>& value)
{
if (KEY_AS("ti") && getValue(value.inTangent)) ;
else if (KEY_AS("to") && getValue(value.outTangent)) ;
else return false;
value.hasTangent = true;
return true;
}
template<typename T>
bool LottieParser::parseTangent(const char *key, LottieScalarFrame<T>& value)
{
return false;
}
LottieInterpolator* LottieParser::getInterpolator(const char* key, Point& in, Point& out)
{
char buf[20];
if (!key) {
snprintf(buf, sizeof(buf), "%.2f_%.2f_%.2f_%.2f", in.x, in.y, out.x, out.y);
key = buf;
}
LottieInterpolator* interpolator = nullptr;
//get a cached interpolator if it has any.
for (auto i = comp->interpolators.begin(); i < comp->interpolators.end(); ++i) {
if (!strncmp((*i)->key, key, sizeof(buf))) interpolator = *i;
}
//new interpolator
if (!interpolator) {
interpolator = static_cast<LottieInterpolator*>(malloc(sizeof(LottieInterpolator)));
interpolator->set(key, in, out);
comp->interpolators.push(interpolator);
}
return interpolator;
}
template<typename T>
void LottieParser::parseKeyFrame(T& prop)
{
Point inTangent, outTangent;
const char* interpolatorKey = nullptr;
auto& frame = prop.newFrame();
auto interpolator = false;
enterObject();
while (auto key = nextObjectKey()) {
if (KEY_AS("i")) {
interpolator = true;
getInterpolatorPoint(inTangent);
} else if (KEY_AS("o")) {
getInterpolatorPoint(outTangent);
} else if (KEY_AS("n")) {
if (peekType() == kStringType) {
interpolatorKey = getString();
} else {
enterArray();
while (nextArrayValue()) {
if (!interpolatorKey) interpolatorKey = getString();
else skip();
}
}
} else if (KEY_AS("t")) {
frame.no = getFloat();
} else if (KEY_AS("s")) {
getValue(frame.value);
} else if (KEY_AS("e")) {
//current end frame and the next start frame is duplicated,
//We propagate the end value to the next frame to avoid having duplicated values.
auto& frame2 = prop.nextFrame();
getValue(frame2.value);
} else if (parseTangent(key, frame)) {
continue;
} else if (KEY_AS("h")) {
frame.hold = getInt();
} else skip();
}
if (interpolator) {
frame.interpolator = getInterpolator(interpolatorKey, inTangent, outTangent);
}
}
template<typename T>
void LottieParser::parsePropertyInternal(T& prop)
{
//single value property
if (peekType() == kNumberType) {
getValue(prop.value);
//multi value property
} else {
enterArray();
while (nextArrayValue()) {
if (peekType() == kObjectType) parseKeyFrame(prop); //keyframes value
else if (getValue(prop.value)) break; //multi value property with no keyframes
}
prop.prepare();
}
}
template<LottieProperty::Type type>
void LottieParser::registerSlot(LottieObject* obj, const char* sid)
{
//append object if the slot already exists.
for (auto slot = comp->slots.begin(); slot < comp->slots.end(); ++slot) {
if (strcmp((*slot)->sid, sid)) continue;
(*slot)->pairs.push({obj});
return;
}
comp->slots.push(new LottieSlot(strdup(sid), obj, type));
}
template<LottieProperty::Type type, typename T>
void LottieParser::parseProperty(T& prop, LottieObject* obj)
{
enterObject();
while (auto key = nextObjectKey()) {
if (KEY_AS("k")) parsePropertyInternal(prop);
else if (obj && KEY_AS("sid")) registerSlot<type>(obj, getString());
else if (KEY_AS("x")) prop.exp = _expression(getStringCopy(), comp, context.layer, context.parent, &prop);
else if (KEY_AS("ix")) prop.ix = getInt();
else skip();
}
prop.type = type;
}
bool LottieParser::parseCommon(LottieObject* obj, const char* key)
{
if (KEY_AS("nm")) {
obj->id = djb2Encode(getString());
return true;
} else if (KEY_AS("hd")) {
obj->hidden = getBool();
return true;
} else return false;
}
bool LottieParser::parseDirection(LottieShape* shape, const char* key)
{
if (KEY_AS("d")) {
if (getInt() == 3) {
shape->clockwise = false; //default is true
}
return true;
}
return false;
}
LottieRect* LottieParser::parseRect()
{
auto rect = new LottieRect;
context.parent = rect;
while (auto key = nextObjectKey()) {
if (parseCommon(rect, key)) continue;
else if (KEY_AS("s")) parseProperty<LottieProperty::Type::Point>(rect->size);
else if (KEY_AS("p")) parseProperty<LottieProperty::Type::Position>(rect->position);
else if (KEY_AS("r")) parseProperty<LottieProperty::Type::Float>(rect->radius);
else if (parseDirection(rect, key)) continue;
else skip();
}
return rect;
}
LottieEllipse* LottieParser::parseEllipse()
{
auto ellipse = new LottieEllipse;
context.parent = ellipse;
while (auto key = nextObjectKey()) {
if (parseCommon(ellipse, key)) continue;
else if (KEY_AS("p")) parseProperty<LottieProperty::Type::Position>(ellipse->position);
else if (KEY_AS("s")) parseProperty<LottieProperty::Type::Point>(ellipse->size);
else if (parseDirection(ellipse, key)) continue;
else skip();
}
return ellipse;
}
LottieTransform* LottieParser::parseTransform(bool ddd)
{
auto transform = new LottieTransform;
context.parent = transform;
if (ddd) {
transform->rotationEx = new LottieTransform::RotationEx;
TVGLOG("LOTTIE", "3D transform(ddd) is not totally compatible.");
}
while (auto key = nextObjectKey()) {
if (parseCommon(transform, key)) continue;
else if (KEY_AS("p"))
{
enterObject();
while (auto key = nextObjectKey()) {
if (KEY_AS("k")) parsePropertyInternal(transform->position);
else if (KEY_AS("s") && getBool()) transform->coords = new LottieTransform::SeparateCoord;
//check separateCoord to figure out whether "x(expression)" / "x(coord)"
else if (transform->coords && KEY_AS("x")) parseProperty<LottieProperty::Type::Float>(transform->coords->x);
else if (transform->coords && KEY_AS("y")) parseProperty<LottieProperty::Type::Float>(transform->coords->y);
else if (KEY_AS("x")) transform->position.exp = _expression(getStringCopy(), comp, context.layer, context.parent, &transform->position);
else skip();
}
transform->position.type = LottieProperty::Type::Position;
}
else if (KEY_AS("a")) parseProperty<LottieProperty::Type::Point>(transform->anchor);
else if (KEY_AS("s")) parseProperty<LottieProperty::Type::Point>(transform->scale);
else if (KEY_AS("r")) parseProperty<LottieProperty::Type::Float>(transform->rotation);
else if (KEY_AS("o")) parseProperty<LottieProperty::Type::Opacity>(transform->opacity);
else if (transform->rotationEx && KEY_AS("rx")) parseProperty<LottieProperty::Type::Float>(transform->rotationEx->x);
else if (transform->rotationEx && KEY_AS("ry")) parseProperty<LottieProperty::Type::Float>(transform->rotationEx->y);
else if (transform->rotationEx && KEY_AS("rz")) parseProperty<LottieProperty::Type::Float>(transform->rotation);
else if (KEY_AS("sk")) parseProperty<LottieProperty::Type::Float>(transform->skewAngle);
else if (KEY_AS("sa")) parseProperty<LottieProperty::Type::Float>(transform->skewAxis);
else skip();
}
return transform;
}
LottieSolidFill* LottieParser::parseSolidFill()
{
auto fill = new LottieSolidFill;
context.parent = fill;
while (auto key = nextObjectKey()) {
if (parseCommon(fill, key)) continue;
else if (KEY_AS("c")) parseProperty<LottieProperty::Type::Color>(fill->color, fill);
else if (KEY_AS("o")) parseProperty<LottieProperty::Type::Opacity>(fill->opacity, fill);
else if (KEY_AS("fillEnabled")) fill->hidden |= !getBool();
else if (KEY_AS("r")) fill->rule = getFillRule();
else skip();
}
return fill;
}
void LottieParser::parseStrokeDash(LottieStroke* stroke)
{
enterArray();
while (nextArrayValue()) {
enterObject();
int idx = 0;
while (auto key = nextObjectKey()) {
if (KEY_AS("n")) {
auto style = getString();
if (!strcmp("o", style)) idx = 0; //offset
else if (!strcmp("d", style)) idx = 1; //dash
else if (!strcmp("g", style)) idx = 2; //gap
} else if (KEY_AS("v")) {
parseProperty<LottieProperty::Type::Float>(stroke->dash(idx));
} else skip();
}
}
}
LottieSolidStroke* LottieParser::parseSolidStroke()
{
auto stroke = new LottieSolidStroke;
context.parent = stroke;
while (auto key = nextObjectKey()) {
if (parseCommon(stroke, key)) continue;
else if (KEY_AS("c")) parseProperty<LottieProperty::Type::Color>(stroke->color, stroke);
else if (KEY_AS("o")) parseProperty<LottieProperty::Type::Opacity>(stroke->opacity, stroke);
else if (KEY_AS("w")) parseProperty<LottieProperty::Type::Float>(stroke->width, stroke);
else if (KEY_AS("lc")) stroke->cap = getStrokeCap();
else if (KEY_AS("lj")) stroke->join = getStrokeJoin();
else if (KEY_AS("ml")) stroke->miterLimit = getFloat();
else if (KEY_AS("fillEnabled")) stroke->hidden |= !getBool();
else if (KEY_AS("d")) parseStrokeDash(stroke);
else skip();
}
return stroke;
}
void LottieParser::getPathSet(LottiePathSet& path)
{
enterObject();
while (auto key = nextObjectKey()) {
if (KEY_AS("k")) {
if (peekType() == kArrayType) {
enterArray();
while (nextArrayValue()) parseKeyFrame(path);
} else {
getValue(path.value);
}
} else if (KEY_AS("x")) {
path.exp = _expression(getStringCopy(), comp, context.layer, context.parent, &path);
} else skip();
}
path.type = LottieProperty::Type::PathSet;
}
LottiePath* LottieParser::parsePath()
{
auto path = new LottiePath;
while (auto key = nextObjectKey()) {
if (parseCommon(path, key)) continue;
else if (KEY_AS("ks")) getPathSet(path->pathset);
else if (parseDirection(path, key)) continue;
else skip();
}
return path;
}
LottiePolyStar* LottieParser::parsePolyStar()
{
auto star = new LottiePolyStar;
context.parent = star;
while (auto key = nextObjectKey()) {
if (parseCommon(star, key)) continue;
else if (KEY_AS("p")) parseProperty<LottieProperty::Type::Position>(star->position);
else if (KEY_AS("pt")) parseProperty<LottieProperty::Type::Float>(star->ptsCnt);
else if (KEY_AS("ir")) parseProperty<LottieProperty::Type::Float>(star->innerRadius);
else if (KEY_AS("is")) parseProperty<LottieProperty::Type::Float>(star->innerRoundness);
else if (KEY_AS("or")) parseProperty<LottieProperty::Type::Float>(star->outerRadius);
else if (KEY_AS("os")) parseProperty<LottieProperty::Type::Float>(star->outerRoundness);
else if (KEY_AS("r")) parseProperty<LottieProperty::Type::Float>(star->rotation);
else if (KEY_AS("sy")) star->type = (LottiePolyStar::Type) getInt();
else if (parseDirection(star, key)) continue;
else skip();
}
return star;
}
LottieRoundedCorner* LottieParser::parseRoundedCorner()
{
auto corner = new LottieRoundedCorner;
context.parent = corner;
while (auto key = nextObjectKey()) {
if (parseCommon(corner, key)) continue;
else if (KEY_AS("r")) parseProperty<LottieProperty::Type::Float>(corner->radius);
else skip();
}
return corner;
}
void LottieParser::parseColorStop(LottieGradient* gradient)
{
enterObject();
while (auto key = nextObjectKey()) {
if (KEY_AS("p")) gradient->colorStops.count = getInt();
else if (KEY_AS("k")) parseProperty<LottieProperty::Type::ColorStop>(gradient->colorStops, gradient);
else if (KEY_AS("sid")) registerSlot<LottieProperty::Type::ColorStop>(gradient, getString());
else skip();
}
}
void LottieParser::parseGradient(LottieGradient* gradient, const char* key)
{
if (KEY_AS("t")) gradient->id = getInt();
else if (KEY_AS("o")) parseProperty<LottieProperty::Type::Opacity>(gradient->opacity, gradient);
else if (KEY_AS("g")) parseColorStop(gradient);
else if (KEY_AS("s")) parseProperty<LottieProperty::Type::Point>(gradient->start, gradient);
else if (KEY_AS("e")) parseProperty<LottieProperty::Type::Point>(gradient->end, gradient);
else if (KEY_AS("h")) parseProperty<LottieProperty::Type::Float>(gradient->height, gradient);
else if (KEY_AS("a")) parseProperty<LottieProperty::Type::Float>(gradient->angle, gradient);
else skip();
}
LottieGradientFill* LottieParser::parseGradientFill()
{
auto fill = new LottieGradientFill;
context.parent = fill;
while (auto key = nextObjectKey()) {
if (parseCommon(fill, key)) continue;
else if (KEY_AS("r")) fill->rule = getFillRule();
else parseGradient(fill, key);
}
fill->prepare();
return fill;
}
LottieGradientStroke* LottieParser::parseGradientStroke()
{
auto stroke = new LottieGradientStroke;
context.parent = stroke;
while (auto key = nextObjectKey()) {
if (parseCommon(stroke, key)) continue;
else if (KEY_AS("lc")) stroke->cap = getStrokeCap();
else if (KEY_AS("lj")) stroke->join = getStrokeJoin();
else if (KEY_AS("ml")) stroke->miterLimit = getFloat();
else if (KEY_AS("w")) parseProperty<LottieProperty::Type::Float>(stroke->width);
else if (KEY_AS("d")) parseStrokeDash(stroke);
else parseGradient(stroke, key);
}
stroke->prepare();
return stroke;
}
LottieTrimpath* LottieParser::parseTrimpath()
{
auto trim = new LottieTrimpath;
context.parent = trim;
while (auto key = nextObjectKey()) {
if (parseCommon(trim, key)) continue;
else if (KEY_AS("s")) parseProperty<LottieProperty::Type::Float>(trim->start);
else if (KEY_AS("e")) parseProperty<LottieProperty::Type::Float>(trim->end);
else if (KEY_AS("o")) parseProperty<LottieProperty::Type::Float>(trim->offset);
else if (KEY_AS("m")) trim->type = static_cast<LottieTrimpath::Type>(getInt());
else skip();
}
return trim;
}
LottieRepeater* LottieParser::parseRepeater()
{
auto repeater = new LottieRepeater;
context.parent = repeater;
while (auto key = nextObjectKey()) {
if (parseCommon(repeater, key)) continue;
else if (KEY_AS("c")) parseProperty<LottieProperty::Type::Float>(repeater->copies);
else if (KEY_AS("o")) parseProperty<LottieProperty::Type::Float>(repeater->offset);
else if (KEY_AS("m")) repeater->inorder = getInt() == 2;
else if (KEY_AS("tr"))
{
enterObject();
while (auto key = nextObjectKey()) {
if (KEY_AS("a")) parseProperty<LottieProperty::Type::Point>(repeater->anchor);
else if (KEY_AS("p")) parseProperty<LottieProperty::Type::Position>(repeater->position);
else if (KEY_AS("r")) parseProperty<LottieProperty::Type::Float>(repeater->rotation);
else if (KEY_AS("s")) parseProperty<LottieProperty::Type::Point>(repeater->scale);
else if (KEY_AS("so")) parseProperty<LottieProperty::Type::Opacity>(repeater->startOpacity);
else if (KEY_AS("eo")) parseProperty<LottieProperty::Type::Opacity>(repeater->endOpacity);
else skip();
}
}
else skip();
}
return repeater;
}
LottieOffsetPath* LottieParser::parseOffsetPath()
{
auto offsetPath = new LottieOffsetPath;
context.parent = offsetPath;
while (auto key = nextObjectKey()) {
if (parseCommon(offsetPath, key)) continue;
else if (KEY_AS("a")) parseProperty<LottieProperty::Type::Float>(offsetPath->offset);
else if (KEY_AS("lj")) offsetPath->join = getStrokeJoin();
else if (KEY_AS("ml")) parseProperty<LottieProperty::Type::Float>(offsetPath->miterLimit);
else skip();
}
return offsetPath;
}
LottieObject* LottieParser::parseObject()
{
auto type = getString();
if (!type) return nullptr;
if (!strcmp(type, "gr")) return parseGroup();
else if (!strcmp(type, "rc")) return parseRect();
else if (!strcmp(type, "el")) return parseEllipse();
else if (!strcmp(type, "tr")) return parseTransform();
else if (!strcmp(type, "fl")) return parseSolidFill();
else if (!strcmp(type, "st")) return parseSolidStroke();
else if (!strcmp(type, "sh")) return parsePath();
else if (!strcmp(type, "sr")) return parsePolyStar();
else if (!strcmp(type, "rd")) return parseRoundedCorner();
else if (!strcmp(type, "gf")) return parseGradientFill();
else if (!strcmp(type, "gs")) return parseGradientStroke();
else if (!strcmp(type, "tm")) return parseTrimpath();
else if (!strcmp(type, "rp")) return parseRepeater();
else if (!strcmp(type, "mm")) TVGLOG("LOTTIE", "MergePath(mm) is not supported yet");
else if (!strcmp(type, "pb")) TVGLOG("LOTTIE", "Puker/Bloat(pb) is not supported yet");
else if (!strcmp(type, "tw")) TVGLOG("LOTTIE", "Twist(tw) is not supported yet");
else if (!strcmp(type, "op")) return parseOffsetPath();
else if (!strcmp(type, "zz")) TVGLOG("LOTTIE", "ZigZag(zz) is not supported yet");
return nullptr;
}
void LottieParser::parseObject(Array<LottieObject*>& parent)
{
enterObject();
while (auto key = nextObjectKey()) {
if (KEY_AS("ty")) {
if (auto child = parseObject()) {
if (child->hidden) delete(child);
else parent.push(child);
}
} else skip();
}
}
void LottieParser::parseImage(LottieImage* image, const char* data, const char* subPath, bool embedded, float width, float height)
{
//embedded image resource. should start with "data:"
//header look like "data:image/png;base64," so need to skip till ','.
if (embedded && !strncmp(data, "data:", 5)) {
//figure out the mimetype
auto mimeType = data + 11;
auto needle = strstr(mimeType, ";");
image->data.mimeType = strDuplicate(mimeType, needle - mimeType);
//b64 data
auto b64Data = strstr(data, ",") + 1;
size_t length = strlen(data) - (b64Data - data);
image->data.size = b64Decode(b64Data, length, &image->data.b64Data);
//external image resource
} else {
auto len = strlen(dirName) + strlen(subPath) + strlen(data) + 2;
image->data.path = static_cast<char*>(malloc(len));
snprintf(image->data.path, len, "%s/%s%s", dirName, subPath, data);
}
image->data.width = width;
image->data.height = height;
image->prepare();
}
LottieObject* LottieParser::parseAsset()
{
enterObject();
LottieObject* obj = nullptr;
unsigned long id = 0;
//Used for Image Asset
const char* sid = nullptr;
const char* data = nullptr;
const char* subPath = nullptr;
float width = 0.0f;
float height = 0.0f;
auto embedded = false;
while (auto key = nextObjectKey()) {
if (KEY_AS("id"))
{
if (peekType() == kStringType) {
id = djb2Encode(getString());
} else {
id = _int2str(getInt());
}
}
else if (KEY_AS("layers")) obj = parseLayers(comp->root);
else if (KEY_AS("u")) subPath = getString();
else if (KEY_AS("p")) data = getString();
else if (KEY_AS("w")) width = getFloat();
else if (KEY_AS("h")) height = getFloat();
else if (KEY_AS("e")) embedded = getInt();
else if (KEY_AS("sid")) sid = getString();
else skip();
}
if (data) {
obj = new LottieImage;
parseImage(static_cast<LottieImage*>(obj), data, subPath, embedded, width, height);
if (sid) registerSlot<LottieProperty::Type::Image>(obj, sid);
}
if (obj) obj->id = id;
return obj;
}
LottieFont* LottieParser::parseFont()
{
enterObject();
auto font = new LottieFont;
while (auto key = nextObjectKey()) {
if (KEY_AS("fName")) font->name = getStringCopy();
else if (KEY_AS("fFamily")) font->family = getStringCopy();
else if (KEY_AS("fStyle")) font->style = getStringCopy();
else if (KEY_AS("ascent")) font->ascent = getFloat();
else if (KEY_AS("origin")) font->origin = (LottieFont::Origin) getInt();
else skip();
}
return font;
}
void LottieParser::parseAssets()
{
enterArray();
while (nextArrayValue()) {
auto asset = parseAsset();
if (asset) comp->assets.push(asset);
else TVGERR("LOTTIE", "Invalid Asset!");
}
}
LottieMarker* LottieParser::parseMarker()
{
enterObject();
auto marker = new LottieMarker;
while (auto key = nextObjectKey()) {
if (KEY_AS("cm")) marker->name = getStringCopy();
else if (KEY_AS("tm")) marker->time = getFloat();
else if (KEY_AS("dr")) marker->duration = getFloat();
else skip();
}
return marker;
}
void LottieParser::parseMarkers()
{
enterArray();
while (nextArrayValue()) {
comp->markers.push(parseMarker());
}
}
void LottieParser::parseChars(Array<LottieGlyph*>& glyphs)
{
enterArray();
while (nextArrayValue()) {
enterObject();
//a new glyph
auto glyph = new LottieGlyph;
while (auto key = nextObjectKey()) {
if (KEY_AS("ch")) glyph->code = getStringCopy();
else if (KEY_AS("size")) glyph->size = static_cast<uint16_t>(getFloat());
else if (KEY_AS("style")) glyph->style = getStringCopy();
else if (KEY_AS("w")) glyph->width = getFloat();
else if (KEY_AS("fFamily")) glyph->family = getStringCopy();
else if (KEY_AS("data"))
{ //glyph shapes
enterObject();
while (auto key = nextObjectKey()) {
if (KEY_AS("shapes")) parseShapes(glyph->children);
}
} else skip();
}
glyph->prepare();
glyphs.push(glyph);
}
}
void LottieParser::parseFonts()
{
enterObject();
while (auto key = nextObjectKey()) {
if (KEY_AS("list")) {
enterArray();
while (nextArrayValue()) {
comp->fonts.push(parseFont());
}
} else skip();
}
}
LottieObject* LottieParser::parseGroup()
{
auto group = new LottieGroup;
while (auto key = nextObjectKey()) {
if (parseCommon(group, key)) continue;
else if (KEY_AS("it")) {
enterArray();
while (nextArrayValue()) parseObject(group->children);
} else skip();
}
if (group->children.empty()) {
delete(group);
return nullptr;
}
group->prepare();
return group;
}
void LottieParser::parseTimeRemap(LottieLayer* layer)
{
parseProperty<LottieProperty::Type::Float>(layer->timeRemap);
}
void LottieParser::parseShapes(Array<LottieObject*>& parent)
{
enterArray();
while (nextArrayValue()) {
enterObject();
while (auto key = nextObjectKey()) {
if (KEY_AS("it")) {
enterArray();
while (nextArrayValue()) parseObject(parent);
} else if (KEY_AS("ty")) {
if (auto child = parseObject()) {
if (child->hidden) delete(child);
else parent.push(child);
}
} else skip();
}
}
}
void LottieParser::parseTextAlignmentOption(LottieText* text)
{
enterObject();
while (auto key = nextObjectKey()) {
if (KEY_AS("g")) text->alignOption.grouping = (LottieText::AlignOption::Group) getInt();
else if (KEY_AS("a")) parseProperty<LottieProperty::Type::Point>(text->alignOption.anchor);
else skip();
}
}
void LottieParser::parseTextRange(LottieText* text)
{
enterArray();
while (nextArrayValue()) {
enterObject();
auto selector = new LottieTextRange;
while (auto key = nextObjectKey()) {
if (KEY_AS("s")) { // text range selector
enterObject();
while (auto key = nextObjectKey()) {
if (KEY_AS("t")) selector->expressible = (bool) getInt();
else if (KEY_AS("xe")) {
parseProperty<LottieProperty::Type::Float>(selector->maxEase);
selector->interpolator = static_cast<LottieInterpolator*>(malloc(sizeof(LottieInterpolator)));
}
else if (KEY_AS("ne")) parseProperty<LottieProperty::Type::Float>(selector->minEase);
else if (KEY_AS("a")) parseProperty<LottieProperty::Type::Float>(selector->maxAmount);
else if (KEY_AS("b")) selector->based = (LottieTextRange::Based) getInt();
else if (KEY_AS("rn")) selector->random = getInt() ? rand() : 0;
else if (KEY_AS("sh")) selector->shape = (LottieTextRange::Shape) getInt();
else if (KEY_AS("o")) parseProperty<LottieProperty::Type::Float>(selector->offset);
else if (KEY_AS("r")) selector->rangeUnit = (LottieTextRange::Unit) getInt();
else if (KEY_AS("sm")) parseProperty<LottieProperty::Type::Float>(selector->smoothness);
else if (KEY_AS("s")) parseProperty<LottieProperty::Type::Float>(selector->start);
else if (KEY_AS("e")) parseProperty<LottieProperty::Type::Float>(selector->end);
else skip();
}
} else if (KEY_AS("a")) { // text style
enterObject();
while (auto key = nextObjectKey()) {
if (KEY_AS("t")) parseProperty<LottieProperty::Type::Float>(selector->style.letterSpacing);
else if (KEY_AS("ls")) parseProperty<LottieProperty::Type::Color>(selector->style.lineSpacing);
else if (KEY_AS("fc")) parseProperty<LottieProperty::Type::Color>(selector->style.fillColor);
else if (KEY_AS("fo")) parseProperty<LottieProperty::Type::Color>(selector->style.fillOpacity);
else if (KEY_AS("sw")) parseProperty<LottieProperty::Type::Float>(selector->style.strokeWidth);
else if (KEY_AS("sc")) parseProperty<LottieProperty::Type::Color>(selector->style.strokeColor);
else if (KEY_AS("so")) parseProperty<LottieProperty::Type::Opacity>(selector->style.strokeOpacity);
else if (KEY_AS("o")) parseProperty<LottieProperty::Type::Opacity>(selector->style.opacity);
else if (KEY_AS("p")) parseProperty<LottieProperty::Type::Position>(selector->style.position);
else if (KEY_AS("s")) parseProperty<LottieProperty::Type::Position>(selector->style.scale);
else if (KEY_AS("r")) parseProperty<LottieProperty::Type::Float>(selector->style.rotation);
else skip();
}
} else skip();
}
text->ranges.push(selector);
}
}
void LottieParser::parseText(Array<LottieObject*>& parent)
{
enterObject();
auto text = new LottieText;
while (auto key = nextObjectKey()) {
if (KEY_AS("d")) parseProperty<LottieProperty::Type::TextDoc>(text->doc, text);
else if (KEY_AS("a")) parseTextRange(text);
else if (KEY_AS("m")) parseTextAlignmentOption(text);
else if (KEY_AS("p"))
{
TVGLOG("LOTTIE", "Text Follow Path (p) is not supported");
skip();
}
else skip();
}
parent.push(text);
}
void LottieParser::getLayerSize(float& val)
{
if (val == 0.0f) {
val = getFloat();
} else {
//layer might have both w(width) & sw(solid color width)
//override one if the a new size is smaller.
auto w = getFloat();
if (w < val) val = w;
}
}
LottieMask* LottieParser::parseMask()
{
auto mask = new LottieMask;
auto valid = true; //skip if the mask mode is none.
enterObject();
while (auto key = nextObjectKey()) {
if (KEY_AS("inv")) mask->inverse = getBool();
else if (KEY_AS("mode"))
{
mask->method = getMaskMethod(mask->inverse);
if (mask->method == MaskMethod::None) valid = false;
}
else if (valid && KEY_AS("pt")) getPathSet(mask->pathset);
else if (valid && KEY_AS("o")) parseProperty<LottieProperty::Type::Opacity>(mask->opacity);
else if (valid && KEY_AS("x")) parseProperty<LottieProperty::Type::Float>(mask->expand);
else skip();
}
if (!valid) {
delete(mask);
return nullptr;
}
return mask;
}
void LottieParser::parseMasks(LottieLayer* layer)
{
enterArray();
while (nextArrayValue()) {
if (auto mask = parseMask()) {
layer->masks.push(mask);
}
}
}
void LottieParser::parseGaussianBlur(LottieGaussianBlur* effect)
{
int idx = 0; //blurness -> direction -> wrap
enterArray();
while (nextArrayValue()) {
enterObject();
while (auto key = nextObjectKey()) {
if (KEY_AS("v")) {
enterObject();
while (auto key = nextObjectKey()) {
if (KEY_AS("k")) {
if (idx == 0) parsePropertyInternal(effect->blurness);
else if (idx == 1) parsePropertyInternal(effect->direction);
else if (idx == 2) parsePropertyInternal(effect->wrap);
else skip();
++idx;
} else skip();
}
} else skip();
}
}
}
void LottieParser::parseDropShadow(LottieDropShadow* effect)
{
int idx = 0; //color -> opacity -> angle -> distance -> blur
enterArray();
while (nextArrayValue()) {
enterObject();
while (auto key = nextObjectKey()) {
if (KEY_AS("v")) {
enterObject();
while (auto key = nextObjectKey()) {
if (KEY_AS("k")) {
if (idx == 0) parsePropertyInternal(effect->color);
else if (idx == 1) parsePropertyInternal(effect->opacity);
else if (idx == 2) parsePropertyInternal(effect->angle);
else if (idx == 3) parsePropertyInternal(effect->distance);
else if (idx == 4) parsePropertyInternal(effect->blurness);
else skip();
++idx;
} else skip();
}
} else skip();
}
}
}
void LottieParser::parseEffect(LottieEffect* effect)
{
switch (effect->type) {
case LottieEffect::GaussianBlur: {
parseGaussianBlur(static_cast<LottieGaussianBlur*>(effect));
break;
}
case LottieEffect::DropShadow: {
parseDropShadow(static_cast<LottieDropShadow*>(effect));
break;
}
default: break;
}
}
void LottieParser::parseEffects(LottieLayer* layer)
{
auto invalid = true;
enterArray();
while (nextArrayValue()) {
LottieEffect* effect = nullptr;
enterObject();
while (auto key = nextObjectKey()) {
//type must be priortized.
if (KEY_AS("ty"))
{
effect = getEffect(getInt());
if (!effect) break;
else invalid = false;
}
else if (effect && KEY_AS("en")) effect->enable = getInt();
else if (effect && KEY_AS("ef")) parseEffect(effect);
else skip();
}
//TODO: remove when all effects were guaranteed.
if (invalid) {
TVGLOG("LOTTIE", "Not supported Layer Effect = %d", effect ? (int)effect->type : -1);
while (nextObjectKey()) skip();
} else layer->effects.push(effect);
}
}
LottieLayer* LottieParser::parseLayer(LottieLayer* precomp)
{
auto layer = new LottieLayer;
layer->comp = precomp;
context.layer = layer;
auto ddd = false;
RGB24 color;
enterObject();
while (auto key = nextObjectKey()) {
if (KEY_AS("nm"))
{
layer->name = getStringCopy();
layer->id = djb2Encode(layer->name);
}
else if (KEY_AS("ddd")) ddd = getInt(); //3d layer
else if (KEY_AS("ind")) layer->idx = getInt();
else if (KEY_AS("ty")) layer->type = (LottieLayer::Type) getInt();
else if (KEY_AS("sr")) layer->timeStretch = getFloat();
else if (KEY_AS("ks"))
{
enterObject();
layer->transform = parseTransform(ddd);
}
else if (KEY_AS("ao")) layer->autoOrient = getInt();
else if (KEY_AS("shapes")) parseShapes(layer->children);
else if (KEY_AS("ip")) layer->inFrame = getFloat();
else if (KEY_AS("op")) layer->outFrame = getFloat();
else if (KEY_AS("st")) layer->startFrame = getFloat();
else if (KEY_AS("bm")) layer->blendMethod = (BlendMethod) getInt();
else if (KEY_AS("parent")) layer->pidx = getInt();
else if (KEY_AS("tm")) parseTimeRemap(layer);
else if (KEY_AS("w") || KEY_AS("sw")) getLayerSize(layer->w);
else if (KEY_AS("h") || KEY_AS("sh")) getLayerSize(layer->h);
else if (KEY_AS("sc")) color = getColor(getString());
else if (KEY_AS("tt")) layer->matteType = getMatteType();
else if (KEY_AS("tp")) layer->mid = getInt();
else if (KEY_AS("masksProperties")) parseMasks(layer);
else if (KEY_AS("hd")) layer->hidden = getBool();
else if (KEY_AS("refId")) layer->rid = djb2Encode(getString());
else if (KEY_AS("td")) layer->matteSrc = getInt(); //used for matte layer
else if (KEY_AS("t")) parseText(layer->children);
else if (KEY_AS("ef")) parseEffects(layer);
else skip();
}
layer->prepare(&color);
return layer;
}
LottieLayer* LottieParser::parseLayers(LottieLayer* root)
{
auto precomp = new LottieLayer;
precomp->type = LottieLayer::Precomp;
precomp->comp = root;
enterArray();
while (nextArrayValue()) {
precomp->children.push(parseLayer(precomp));
}
precomp->prepare();
return precomp;
}
void LottieParser::postProcess(Array<LottieGlyph*>& glyphs)
{
//aggregate font characters
for (uint32_t g = 0; g < glyphs.count; ++g) {
auto glyph = glyphs[g];
for (uint32_t i = 0; i < comp->fonts.count; ++i) {
auto& font = comp->fonts[i];
if (!strcmp(font->family, glyph->family) && !strcmp(font->style, glyph->style)) {
font->chars.push(glyph);
free(glyph->family);
free(glyph->style);
break;
}
}
}
}
/************************************************************************/
/* External Class Implementation */
/************************************************************************/
const char* LottieParser::sid(bool first)
{
if (first) {
//verify json
if (!parseNext()) return nullptr;
enterObject();
}
return nextObjectKey();
}
bool LottieParser::apply(LottieSlot* slot, bool byDefault)
{
enterObject();
//OPTIMIZE: we can create the property directly, without object
LottieObject* obj = nullptr; //slot object
switch (slot->type) {
case LottieProperty::Type::Opacity: {
obj = new LottieSolid;
context.parent = obj;
parseSlotProperty<LottieProperty::Type::Opacity>(static_cast<LottieSolid*>(obj)->opacity);
break;
}
case LottieProperty::Type::Color: {
obj = new LottieSolid;
context.parent = obj;
parseSlotProperty<LottieProperty::Type::Color>(static_cast<LottieSolid*>(obj)->color);
break;
}
case LottieProperty::Type::ColorStop: {
obj = new LottieGradient;
context.parent = obj;
while (auto key = nextObjectKey()) {
if (KEY_AS("p")) parseColorStop(static_cast<LottieGradient*>(obj));
else skip();
}
break;
}
case LottieProperty::Type::TextDoc: {
obj = new LottieText;
context.parent = obj;
parseSlotProperty<LottieProperty::Type::TextDoc>(static_cast<LottieText*>(obj)->doc);
break;
}
case LottieProperty::Type::Image: {
while (auto key = nextObjectKey()) {
if (KEY_AS("p")) obj = parseAsset();
else skip();
}
context.parent = obj;
break;
}
default: break;
}
if (!obj || Invalid()) {
delete(obj);
return false;
}
slot->assign(obj, byDefault);
delete(obj);
return true;
}
void LottieParser::captureSlots(const char* key)
{
free(slots);
// TODO: Replace with immediate parsing, once the slot spec is confirmed by the LAC
auto begin = getPos();
auto end = getPos();
auto depth = 1;
auto invalid = true;
//get slots string
while (++end) {
if (*end == '}') {
--depth;
if (depth == 0) {
invalid = false;
break;
}
} else if (*end == '{') {
++depth;
}
}
if (invalid) {
TVGERR("LOTTIE", "Invalid Slots!");
skip();
return;
}
//composite '{' + slots + '}'
auto len = (end - begin + 2);
slots = (char*)malloc(sizeof(char) * len + 1);
slots[0] = '{';
memcpy(slots + 1, begin, len);
slots[len] = '\0';
skip();
}
bool LottieParser::parse()
{
//verify json.
if (!parseNext()) return false;
enterObject();
if (comp) delete(comp);
comp = new LottieComposition;
Array<LottieGlyph*> glyphs;
auto startFrame = 0.0f;
auto endFrame = 0.0f;
while (auto key = nextObjectKey()) {
if (KEY_AS("v")) comp->version = getStringCopy();
else if (KEY_AS("fr")) comp->frameRate = getFloat();
else if (KEY_AS("ip")) startFrame = getFloat();
else if (KEY_AS("op")) endFrame = getFloat();
else if (KEY_AS("w")) comp->w = getFloat();
else if (KEY_AS("h")) comp->h = getFloat();
else if (KEY_AS("nm")) comp->name = getStringCopy();
else if (KEY_AS("assets")) parseAssets();
else if (KEY_AS("layers")) comp->root = parseLayers(comp->root);
else if (KEY_AS("fonts")) parseFonts();
else if (KEY_AS("chars")) parseChars(glyphs);
else if (KEY_AS("markers")) parseMarkers();
else if (KEY_AS("slots")) captureSlots(key);
else skip();
}
if (Invalid() || !comp->root) {
delete(comp);
return false;
}
comp->root->inFrame = startFrame;
comp->root->outFrame = endFrame;
postProcess(glyphs);
return true;
}
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