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/*
* Copyright 2019 Google LLC
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "include/core/SkCanvas.h"
#include "include/core/SkImage.h"
#include "include/core/SkString.h"
#include "include/core/SkTypes.h"
#include "modules/skottie/include/Skottie.h"
#include "modules/sksg/include/SkSGInvalidationController.h"
#include <string>
#include <vector>
#include <emscripten.h>
#include <emscripten/bind.h>
#include "modules/canvaskit/WasmCommon.h"
#if SK_INCLUDE_MANAGED_SKOTTIE
#include "modules/skottie/include/SkottieProperty.h"
#include "modules/skottie/utils/SkottieUtils.h"
#include "modules/skresources/include/SkResources.h"
#endif // SK_INCLUDE_MANAGED_SKOTTIE
using namespace emscripten;
#if SK_INCLUDE_MANAGED_SKOTTIE
namespace {
// WebTrack wraps a JS object that has a 'seek' method.
// Playback logic is kept there.
class WebTrack final : public skresources::ExternalTrackAsset {
public:
explicit WebTrack(emscripten::val player) : fPlayer(std::move(player)) {}
private:
void seek(float t) override {
fPlayer.call<void>("seek", val(t));
}
const emscripten::val fPlayer;
};
class SkottieAssetProvider : public skottie::ResourceProvider {
public:
~SkottieAssetProvider() override = default;
// Tried using a map, but that gave strange errors like
// https://emscripten.org/docs/porting/guidelines/function_pointer_issues.html
// Not entirely sure why, but perhaps the iterator in the map was
// confusing enscripten.
using AssetVec = std::vector<std::pair<SkString, sk_sp<SkData>>>;
static sk_sp<SkottieAssetProvider> Make(AssetVec assets, emscripten::val soundMap) {
return sk_sp<SkottieAssetProvider>(new SkottieAssetProvider(std::move(assets),
std::move(soundMap)));
}
sk_sp<skottie::ImageAsset> loadImageAsset(const char[] /* path */,
const char name[],
const char[] /* id */) const override {
// For CK/Skottie we ignore paths & IDs, and identify images based solely on name.
if (auto data = this->findAsset(name)) {
return skresources::MultiFrameImageAsset::Make(std::move(data));
}
return nullptr;
}
sk_sp<skresources::ExternalTrackAsset> loadAudioAsset(const char[] /* path */,
const char[] /* name */,
const char id[]) override {
emscripten::val player = this->findSoundAsset(id);
if (player.as<bool>()) {
return sk_make_sp<WebTrack>(std::move(player));
}
return nullptr;
}
sk_sp<SkData> loadFont(const char name[], const char[] /* url */) const override {
// Same as images paths, we ignore font URLs.
return this->findAsset(name);
}
sk_sp<SkData> load(const char[]/*path*/, const char name[]) const override {
// Ignore paths.
return this->findAsset(name);
}
private:
explicit SkottieAssetProvider(AssetVec assets, emscripten::val soundMap)
: fAssets(std::move(assets))
, fSoundMap(std::move(soundMap)) {}
sk_sp<SkData> findAsset(const char name[]) const {
for (const auto& asset : fAssets) {
if (asset.first.equals(name)) {
return asset.second;
}
}
SkDebugf("Could not find %s\n", name);
return nullptr;
}
emscripten::val findSoundAsset(const char name[]) const {
if (fSoundMap.as<bool>() && fSoundMap.hasOwnProperty("getPlayer")) {
emscripten::val player = fSoundMap.call<emscripten::val>("getPlayer", val(name));
if (player.as<bool>() && player.hasOwnProperty("seek")) {
return player;
}
}
return emscripten::val::null();
}
const AssetVec fAssets;
const emscripten::val fSoundMap;
};
// Wraps a JS object with 'onError' and 'onWarning' methods.
class JSLogger final : public skottie::Logger {
public:
static sk_sp<JSLogger> Make(emscripten::val logger) {
return logger.as<bool>()
&& logger.hasOwnProperty(kWrnFunc)
&& logger.hasOwnProperty(kErrFunc)
? sk_sp<JSLogger>(new JSLogger(std::move(logger)))
: nullptr;
}
private:
explicit JSLogger(emscripten::val logger) : fLogger(std::move(logger)) {}
void log(Level lvl, const char msg[], const char* json) override {
const auto* func = lvl == Level::kError ? kErrFunc : kWrnFunc;
fLogger.call<void>(func, std::string(msg), std::string(json));
}
static constexpr char kWrnFunc[] = "onWarning",
kErrFunc[] = "onError";
const emscripten::val fLogger;
};
class ManagedAnimation final : public SkRefCnt {
public:
static sk_sp<ManagedAnimation> Make(const std::string& json,
sk_sp<skottie::ResourceProvider> rp,
std::string prop_prefix,
emscripten::val logger) {
auto mgr = std::make_unique<skottie_utils::CustomPropertyManager>(
skottie_utils::CustomPropertyManager::Mode::kCollapseProperties,
prop_prefix.empty() ? nullptr : prop_prefix.c_str());
static constexpr char kInterceptPrefix[] = "__";
auto pinterceptor =
sk_make_sp<skottie_utils::ExternalAnimationPrecompInterceptor>(rp, kInterceptPrefix);
auto animation = skottie::Animation::Builder()
.setMarkerObserver(mgr->getMarkerObserver())
.setPropertyObserver(mgr->getPropertyObserver())
.setResourceProvider(std::move(rp))
.setPrecompInterceptor(std::move(pinterceptor))
.setLogger(JSLogger::Make(std::move(logger)))
.make(json.c_str(), json.size());
return animation
? sk_sp<ManagedAnimation>(new ManagedAnimation(std::move(animation), std::move(mgr)))
: nullptr;
}
~ManagedAnimation() override = default;
// skottie::Animation API
void render(SkCanvas* canvas, const SkRect* dst) const { fAnimation->render(canvas, dst); }
// Returns a damage rect.
SkRect seek(SkScalar t) {
sksg::InvalidationController ic;
fAnimation->seek(t, &ic);
return ic.bounds();
}
// Returns a damage rect.
SkRect seekFrame(double t) {
sksg::InvalidationController ic;
fAnimation->seekFrame(t, &ic);
return ic.bounds();
}
double duration() const { return fAnimation->duration(); }
double fps() const { return fAnimation->fps(); }
const SkSize& size() const { return fAnimation->size(); }
std::string version() const { return std::string(fAnimation->version().c_str()); }
// CustomPropertyManager API
JSArray getColorProps() const {
JSArray props = emscripten::val::array();
for (const auto& cp : fPropMgr->getColorProps()) {
JSObject prop = emscripten::val::object();
prop.set("key", cp);
prop.set("value", fPropMgr->getColor(cp));
props.call<void>("push", prop);
}
return props;
}
JSArray getOpacityProps() const {
JSArray props = emscripten::val::array();
for (const auto& op : fPropMgr->getOpacityProps()) {
JSObject prop = emscripten::val::object();
prop.set("key", op);
prop.set("value", fPropMgr->getOpacity(op));
props.call<void>("push", prop);
}
return props;
}
JSArray getTextProps() const {
JSArray props = emscripten::val::array();
for (const auto& key : fPropMgr->getTextProps()) {
const auto txt = fPropMgr->getText(key);
JSObject txt_val = emscripten::val::object();
txt_val.set("text", txt.fText.c_str());
txt_val.set("size", txt.fTextSize);
JSObject prop = emscripten::val::object();
prop.set("key", key);
prop.set("value", std::move(txt_val));
props.call<void>("push", prop);
}
return props;
}
bool setColor(const std::string& key, SkColor c) {
return fPropMgr->setColor(key, c);
}
bool setOpacity(const std::string& key, float o) {
return fPropMgr->setOpacity(key, o);
}
bool setText(const std::string& key, std::string text, float size) {
// preserve all other text fields
auto t = fPropMgr->getText(key);
t.fText = SkString(text);
t.fTextSize = size;
return fPropMgr->setText(key, t);
}
JSArray getMarkers() const {
JSArray markers = emscripten::val::array();
for (const auto& m : fPropMgr->markers()) {
JSObject marker = emscripten::val::object();
marker.set("name", m.name);
marker.set("t0" , m.t0);
marker.set("t1" , m.t1);
markers.call<void>("push", marker);
}
return markers;
}
private:
ManagedAnimation(sk_sp<skottie::Animation> animation,
std::unique_ptr<skottie_utils::CustomPropertyManager> propMgr)
: fAnimation(std::move(animation))
, fPropMgr(std::move(propMgr))
{}
const sk_sp<skottie::Animation> fAnimation;
const std::unique_ptr<skottie_utils::CustomPropertyManager> fPropMgr;
};
} // anonymous ns
#endif // SK_INCLUDE_MANAGED_SKOTTIE
EMSCRIPTEN_BINDINGS(Skottie) {
// Animation things (may eventually go in own library)
class_<skottie::Animation>("Animation")
.smart_ptr<sk_sp<skottie::Animation>>("sk_sp<Animation>")
.function("version", optional_override([](skottie::Animation& self)->std::string {
return std::string(self.version().c_str());
}))
.function("_size", optional_override([](skottie::Animation& self,
WASMPointerF32 oPtr)->void {
SkSize* output = reinterpret_cast<SkSize*>(oPtr);
*output = self.size();
}))
.function("duration", &skottie::Animation::duration)
.function("fps" , &skottie::Animation::fps)
.function("seek", optional_override([](skottie::Animation& self, SkScalar t)->void {
self.seek(t);
}))
.function("seekFrame", optional_override([](skottie::Animation& self, double t)->void {
self.seekFrame(t);
}))
.function("_render", optional_override([](skottie::Animation& self, SkCanvas* canvas,
WASMPointerF32 fPtr)->void {
const SkRect* dst = reinterpret_cast<const SkRect*>(fPtr);
self.render(canvas, dst);
}), allow_raw_pointers());
function("MakeAnimation", optional_override([](std::string json)->sk_sp<skottie::Animation> {
return skottie::Animation::Make(json.c_str(), json.length());
}));
constant("skottie", true);
#if SK_INCLUDE_MANAGED_SKOTTIE
class_<ManagedAnimation>("ManagedAnimation")
.smart_ptr<sk_sp<ManagedAnimation>>("sk_sp<ManagedAnimation>")
.function("version" , &ManagedAnimation::version)
.function("_size", optional_override([](ManagedAnimation& self,
WASMPointerF32 oPtr)->void {
SkSize* output = reinterpret_cast<SkSize*>(oPtr);
*output = self.size();
}))
.function("duration" , &ManagedAnimation::duration)
.function("fps" , &ManagedAnimation::fps)
.function("_render", optional_override([](ManagedAnimation& self, SkCanvas* canvas,
WASMPointerF32 fPtr)->void {
const SkRect* dst = reinterpret_cast<const SkRect*>(fPtr);
self.render(canvas, dst);
}), allow_raw_pointers())
.function("_seek", optional_override([](ManagedAnimation& self, SkScalar t,
WASMPointerF32 fPtr) {
SkRect* damageRect = reinterpret_cast<SkRect*>(fPtr);
damageRect[0] = self.seek(t);
}))
.function("_seekFrame", optional_override([](ManagedAnimation& self, double frame,
WASMPointerF32 fPtr) {
SkRect* damageRect = reinterpret_cast<SkRect*>(fPtr);
damageRect[0] = self.seekFrame(frame);
}))
.function("seekFrame" , &ManagedAnimation::seekFrame)
.function("_setColor" , optional_override([](ManagedAnimation& self, const std::string& key, WASMPointerF32 cPtr) {
float* fourFloats = reinterpret_cast<float*>(cPtr);
SkColor4f color = { fourFloats[0], fourFloats[1], fourFloats[2], fourFloats[3] };
return self.setColor(key, color.toSkColor());
}))
.function("setOpacity", &ManagedAnimation::setOpacity)
.function("getMarkers", &ManagedAnimation::getMarkers)
.function("getColorProps" , &ManagedAnimation::getColorProps)
.function("getOpacityProps", &ManagedAnimation::getOpacityProps)
.function("getTextProps" , &ManagedAnimation::getTextProps)
.function("setText" , &ManagedAnimation::setText);
function("_MakeManagedAnimation", optional_override([](std::string json,
size_t assetCount,
WASMPointerU32 nptr,
WASMPointerU32 dptr,
WASMPointerU32 sptr,
std::string prop_prefix,
emscripten::val soundMap,
emscripten::val logger)
->sk_sp<ManagedAnimation> {
const auto assetNames = reinterpret_cast<char** >(nptr);
const auto assetDatas = reinterpret_cast<uint8_t**>(dptr);
const auto assetSizes = reinterpret_cast<size_t* >(sptr);
SkottieAssetProvider::AssetVec assets;
assets.reserve(assetCount);
for (size_t i = 0; i < assetCount; i++) {
auto name = SkString(assetNames[i]);
auto bytes = SkData::MakeFromMalloc(assetDatas[i], assetSizes[i]);
assets.push_back(std::make_pair(std::move(name), std::move(bytes)));
}
return ManagedAnimation::Make(json,
skresources::DataURIResourceProviderProxy::Make(
SkottieAssetProvider::Make(std::move(assets),
std::move(soundMap))),
prop_prefix, std::move(logger));
}));
constant("managed_skottie", true);
#endif // SK_INCLUDE_MANAGED_SKOTTIE
}