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/*
* Copyright 2018 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkottieAdapter.h"
#include "SkMatrix.h"
#include "SkPath.h"
#include "SkRRect.h"
#include "SkSGGradient.h"
#include "SkSGPath.h"
#include "SkSGRect.h"
#include "SkSGTransform.h"
#include "SkSGTrimEffect.h"
#include "SkTo.h"
#include "SkottieValue.h"
#include <cmath>
#include <utility>
namespace skottie {
RRectAdapter::RRectAdapter(sk_sp<sksg::RRect> wrapped_node)
: fRRectNode(std::move(wrapped_node)) {}
void RRectAdapter::apply() {
// BM "position" == "center position"
auto rr = SkRRect::MakeRectXY(SkRect::MakeXYWH(fPosition.x() - fSize.width() / 2,
fPosition.y() - fSize.height() / 2,
fSize.width(), fSize.height()),
fRadius.width(),
fRadius.height());
fRRectNode->setRRect(rr);
}
TransformAdapter::TransformAdapter(sk_sp<sksg::Matrix> matrix)
: fMatrixNode(std::move(matrix)) {}
void TransformAdapter::apply() {
SkMatrix t = SkMatrix::MakeTrans(-fAnchorPoint.x(), -fAnchorPoint.y());
t.postScale(fScale.x() / 100, fScale.y() / 100); // 100% based
t.postRotate(fRotation);
t.postTranslate(fPosition.x(), fPosition.y());
// TODO: skew
fMatrixNode->setMatrix(t);
}
PolyStarAdapter::PolyStarAdapter(sk_sp<sksg::Path> wrapped_node, Type t)
: fPathNode(std::move(wrapped_node))
, fType(t) {}
void PolyStarAdapter::apply() {
static constexpr int kMaxPointCount = 100000;
const auto count = SkToUInt(SkTPin(SkScalarRoundToInt(fPointCount), 0, kMaxPointCount));
const auto arc = sk_ieee_float_divide(SK_ScalarPI * 2, count);
const auto pt_on_circle = [](const SkPoint& c, SkScalar r, SkScalar a) {
return SkPoint::Make(c.x() + r * std::cos(a),
c.y() + r * std::sin(a));
};
// TODO: inner/outer "roundness"?
SkPath poly;
auto angle = SkDegreesToRadians(fRotation);
poly.moveTo(pt_on_circle(fPosition, fOuterRadius, angle));
poly.incReserve(fType == Type::kStar ? count * 2 : count);
for (unsigned i = 0; i < count; ++i) {
if (fType == Type::kStar) {
poly.lineTo(pt_on_circle(fPosition, fInnerRadius, angle + arc * 0.5f));
}
angle += arc;
poly.lineTo(pt_on_circle(fPosition, fOuterRadius, angle));
}
poly.close();
fPathNode->setPath(poly);
}
GradientAdapter::GradientAdapter(sk_sp<sksg::Gradient> grad, size_t stopCount)
: fGradient(std::move(grad))
, fStopCount(stopCount) {}
void GradientAdapter::apply() {
this->onApply();
// |fColorStops| holds |fStopCount| x [ pos, r, g, g ] + ? x [ pos, alpha ]
if (fColorStops.size() < fStopCount * 4 || ((fColorStops.size() - fStopCount * 4) % 2)) {
SkDebugf("!! Invalid gradient stop array size: %zu", fColorStops.size());
return;
}
std::vector<sksg::Gradient::ColorStop> stops;
// TODO: merge/lerp opacity stops
const auto csEnd = fColorStops.cbegin() + fStopCount * 4;
for (auto cs = fColorStops.cbegin(); cs != csEnd; cs += 4) {
const auto pos = cs[0];
const VectorValue rgb({ cs[1], cs[2], cs[3] });
stops.push_back({ pos, ValueTraits<VectorValue>::As<SkColor>(rgb) });
}
fGradient->setColorStops(std::move(stops));
}
LinearGradientAdapter::LinearGradientAdapter(sk_sp<sksg::LinearGradient> grad, size_t stopCount)
: INHERITED(std::move(grad), stopCount) {}
void LinearGradientAdapter::onApply() {
auto* grad = static_cast<sksg::LinearGradient*>(fGradient.get());
grad->setStartPoint(this->startPoint());
grad->setEndPoint(this->endPoint());
}
RadialGradientAdapter::RadialGradientAdapter(sk_sp<sksg::RadialGradient> grad, size_t stopCount)
: INHERITED(std::move(grad), stopCount) {}
void RadialGradientAdapter::onApply() {
auto* grad = static_cast<sksg::RadialGradient*>(fGradient.get());
grad->setStartCenter(this->startPoint());
grad->setEndCenter(this->startPoint());
grad->setStartRadius(0);
grad->setEndRadius(SkPoint::Distance(this->startPoint(), this->endPoint()));
}
TrimEffectAdapter::TrimEffectAdapter(sk_sp<sksg::TrimEffect> trimEffect)
: fTrimEffect(std::move(trimEffect)) {
SkASSERT(fTrimEffect);
}
void TrimEffectAdapter::apply() {
// BM semantics: start/end are percentages, offset is "degrees" (?!).
const auto start = fStart / 100,
end = fEnd / 100,
offset = fOffset / 360;
auto startT = SkTMin(start, end) + offset,
stopT = SkTMax(start, end) + offset;
auto mode = SkTrimPathEffect::Mode::kNormal;
if (stopT - startT < 1) {
startT -= SkScalarFloorToScalar(startT);
stopT -= SkScalarFloorToScalar(stopT);
if (startT > stopT) {
using std::swap;
swap(startT, stopT);
mode = SkTrimPathEffect::Mode::kInverted;
}
} else {
startT = 0;
stopT = 1;
}
fTrimEffect->setStart(startT);
fTrimEffect->setStop(stopT);
fTrimEffect->setMode(mode);
}
} // namespace skottie
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