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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include <unordered_map>
#include <vector>
#include "SkData.h"
#include "SkMatrix.h"
#include "SkValue.h"
class SkValue::Obj {
public:
void set(SkValue::Key k, SkValue&& v) { fMap[k] = std::move(v); }
const SkValue* get(SkValue::Key k) const {
auto it = fMap.find(k);
return it != fMap.end() ? &it->second : nullptr;
}
void foreach(std::function<void(Key, const SkValue&)> fn) const {
for (const auto& pair : fMap) {
fn(pair.first, pair.second);
}
}
private:
std::unordered_map<SkValue::Key, SkValue> fMap;
};
class SkValue::Arr {
public:
size_t length() const { return fVec.size(); }
void append(SkValue&& val) { fVec.emplace_back(std::move(val)); }
const SkValue& at(size_t index) const {
SkASSERT(index < fVec.size());
return fVec[index];
}
private:
std::vector<SkValue> fVec;
};
SkValue::SkValue() : fType(Null) {}
SkValue::SkValue(Type type) : fType(type) {}
SkValue::SkValue(const SkValue& o) {
memcpy(this, &o, sizeof(o));
if (this->isData()) {
fBytes->ref();
} else if (this->isObject()) {
fObject = new Obj(*fObject);
} else if (Array == fType) {
fArray = new Arr(*fArray);
}
}
SkValue::SkValue(SkValue&& o) {
memcpy(this, &o, sizeof(o));
new (&o) SkValue();
}
SkValue& SkValue::operator=(const SkValue& o) {
if (this != &o) {
this->~SkValue();
new (this) SkValue(o);
}
return *this;
}
SkValue& SkValue::operator=(SkValue&& o) {
if (this != &o) {
this->~SkValue();
new (this) SkValue(std::move(o));
}
return *this;
}
SkValue::~SkValue() {
if (this->isData()) {
fBytes->unref();
} else if (this->isObject()) {
delete fObject;
} else if (Array == fType) {
delete fArray;
}
}
template <typename T>
SkValue SkValue::FromT(SkValue::Type type, T SkValue::*mp, T t) {
SkValue v(type);
v.*mp = t;
return v;
}
SkValue SkValue::FromS32(int32_t x) { return FromT(S32, &SkValue::fS32, x); }
SkValue SkValue::FromU32(uint32_t x) { return FromT(U32, &SkValue::fU32, x); }
SkValue SkValue::FromF32(float x) { return FromT(F32, &SkValue::fF32, x); }
int32_t SkValue::s32() const { SkASSERT(S32 == fType); return fS32; }
uint32_t SkValue::u32() const { SkASSERT(U32 == fType); return fU32; }
float SkValue::f32() const { SkASSERT(F32 == fType); return fF32; }
SkValue SkValue::FromBytes(SkData* data) {
if (!data) {
return SkValue();
}
SkValue v(Bytes);
v.fBytes = SkRef(data);
return v;
}
SkValue SkValue::Object(SkValue::Type t) {
SkValue v(t);
SkASSERT(v.isObject());
v.fObject = new Obj;
return v;
}
SkValue SkValue::ValueArray() {
SkValue v(Array);
v.fArray = new Arr;
return v;
}
SkData* SkValue::bytes() const {
SkASSERT(this->isData());
return fBytes;
}
void SkValue::set(SkValue::Key k, SkValue v) {
SkASSERT(this->isObject());
fObject->set(k, std::move(v));
}
const SkValue* SkValue::get(Key k) const {
SkASSERT(this->isObject());
return fObject->get(k);
}
void SkValue::foreach(std::function<void(Key, const SkValue&)> fn) const {
SkASSERT(this->isObject());
fObject->foreach(fn);
}
size_t SkValue::length() const {
SkASSERT(Array == fType);
return fArray->length();
}
const SkValue& SkValue::at(size_t index) const {
SkASSERT(Array == fType);
return fArray->at(index);
}
void SkValue::append(SkValue val) {
SkASSERT(Array == fType);
fArray->append(std::move(val));
}
template <typename T>
const T* SkValue::asTs(SkValue::Type t, int* count) const {
SkASSERT(t == fType && this->isData());
SkASSERT(count);
*count = fBytes->size() / sizeof(T);
return static_cast<const T*>(fBytes->data());
}
const uint16_t* SkValue::u16s(int* c) const { return this->asTs<uint16_t>(U16s, c); }
const uint32_t* SkValue::u32s(int* c) const { return this->asTs<uint32_t>(U32s, c); }
const float* SkValue::f32s(int* c) const { return this->asTs<float >(F32s, c); }
template <typename T>
SkValue SkValue::FromTs(SkValue::Type type, SkData* data) {
SkValue val(type);
val.fBytes = SkRef(data);
SkASSERT(val.isData());
SkASSERT(0 == (reinterpret_cast<uintptr_t>(data->bytes()) & (sizeof(T)-1)));
return val;
}
SkValue SkValue::FromU16s(SkData* d) { return FromTs<uint16_t>(U16s, d); }
SkValue SkValue::FromU32s(SkData* d) { return FromTs<uint32_t>(U32s, d); }
SkValue SkValue::FromF32s(SkData* d) { return FromTs< float>(F32s, d); }
////////////////////////////////////////////////////////////////////////////////
#define REQUIRE(cond) do { if (!(cond)) { SkASSERT(false); return false; } } while (false)
template<> SkValue SkToValue<SkMatrix>(const SkMatrix& mat) {
auto val = SkValue::Object(SkValue::Matrix);
for (int i = 0; i < 9; ++i) {
if (mat[i] != SkMatrix::I()[i]) {
val.set(i, SkValue::FromF32(mat[i]));
}
}
return val;
}
template<> bool SkFromValue<float>(const SkValue& val, float* f) {
REQUIRE(val.type() == SkValue::F32);
*f = val.f32();
return true;
}
template<> bool SkFromValue<SkMatrix>(const SkValue& val, SkMatrix* m){
REQUIRE(val.type() == SkValue::Matrix);
*m = SkMatrix::I();
for (int i = 0; i < 9; i++) {
if (auto v = val.get(i)) {
REQUIRE(SkFromValue(*v, &(*m)[i]));
}
}
return true;
}
#undef REQUIRE
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