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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 "SkArithmeticMode.h"
#include "SkLerpXfermode.h"
#include "SkMatrix.h"
#include "SkPixelXorXfermode.h"
#include "SkToFromValue.h"
#include "SkValueKeys.h"
#include "SkXfermode.h"
////////////////////////////////////////////////////////////////////////////////
#define REQUIRE(cond) do { if (!(cond)) { SkASSERT(false); return false; } } while (false)
template <typename T>
bool getT(const SkValue& obj, SkValue::Key key, T* ptr) {
auto v = obj.get(key);
return v ? SkFromValue(*v, ptr) : false;
}
template<> bool SkFromValue<float>(const SkValue& val, float* f) {
REQUIRE(val.type() == SkValue::F32);
*f = val.f32();
return true;
}
template<> bool SkFromValue<int32_t>(const SkValue& val, int32_t* x) {
REQUIRE(val.type() == SkValue::S32);
*x = val.s32();
return true;
}
template<> bool SkFromValue<uint32_t>(const SkValue& val, uint32_t* x) {
REQUIRE(val.type() == SkValue::U32);
*x = val.u32();
return true;
}
////////////////////////////////////////////////////////////////////////////////
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<SkMatrix>(const SkValue& val, SkMatrix* m) {
REQUIRE(val.type() == SkValue::Matrix);
*m = SkMatrix::I();
for (int i = 0; i < 9; i++) {
getT(val, i, &(*m)[i]);
}
return true;
}
////////////////////////////////////////////////////////////////////////////////
template<> SkValue SkToValue<SkXfermode>(const SkXfermode* x) {
return x ? x->asValue() : SkValue::Object(SkValue::DefaultXfermode);
}
static bool from_value_DefaultXfermode(const SkValue& val,
SkAutoTUnref<SkXfermode>* dst) {
dst->reset(nullptr);
return true;
}
static bool from_value_ArithmeticXfermode(const SkValue& val,
SkAutoTUnref<SkXfermode>* dst) {
using namespace SkValueKeys::ArithmeticXfermode;
float k[4];
REQUIRE(getT(val, kK0, &k[0]));
REQUIRE(getT(val, kK1, &k[1]));
REQUIRE(getT(val, kK2, &k[2]));
REQUIRE(getT(val, kK3, &k[3]));
int32_t enforce = true;
getT(val, kEnforcePMColor, &enforce);
dst->reset(SkArithmeticMode::Create(
k[0], k[1], k[2], k[3], SkToBool(enforce)));
return true;
}
static bool from_value_LerpXfermode(const SkValue& val,
SkAutoTUnref<SkXfermode>* dst) {
float scale;
REQUIRE(getT(val, SkValueKeys::LerpXfermode::kScale, &scale));
dst->reset(SkLerpXfermode::Create(scale));
return true;
}
static bool from_value_PixelXorXfermode(const SkValue& val,
SkAutoTUnref<SkXfermode>* dst) {
uint32_t opColor;
REQUIRE(getT(val, SkValueKeys::PixelXorXfermode::kOpColor, &opColor));
dst->reset(SkPixelXorXfermode::Create(opColor));
return true;
}
static bool from_value_ProcCoeffXfermode(const SkValue& val,
SkAutoTUnref<SkXfermode>* dst) {
uint32_t mode;
REQUIRE(getT(val, SkValueKeys::ProcCoeffXfermode::kMode, &mode));
dst->reset(SkXfermode::Create((SkXfermode::Mode)mode));
return true;
}
template<> bool SkFromValue< SkAutoTUnref<SkXfermode> >(
const SkValue& val, SkAutoTUnref<SkXfermode>* dst) {
switch (val.type()) {
case SkValue::DefaultXfermode: return from_value_DefaultXfermode(val, dst);
case SkValue::ArithmeticXfermode: return from_value_ArithmeticXfermode(val, dst);
case SkValue::LerpXfermode: return from_value_LerpXfermode(val, dst);
case SkValue::PixelXorXfermode: return from_value_PixelXorXfermode(val, dst);
case SkValue::ProcCoeffXfermode: return from_value_ProcCoeffXfermode(val, dst);
default: REQUIRE(false);
}
}
////////////////////////////////////////////////////////////////////////////////
#undef REQUIRE
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