Florin Malita | a6e30f7 | 2018-03-23 13:41:58 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2018 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | #include "SkottieAdapter.h" |
| 9 | |
| 10 | #include "SkMatrix.h" |
| 11 | #include "SkottieValue.h" |
| 12 | #include "SkPath.h" |
| 13 | #include "SkRRect.h" |
| 14 | #include "SkSGGradient.h" |
| 15 | #include "SkSGPath.h" |
| 16 | #include "SkSGRect.h" |
| 17 | #include "SkSGTransform.h" |
| 18 | #include "SkSGTrimEffect.h" |
| 19 | |
| 20 | #include <cmath> |
| 21 | |
| 22 | namespace skottie { |
| 23 | |
| 24 | RRectAdapter::RRectAdapter(sk_sp<sksg::RRect> wrapped_node) |
| 25 | : fRRectNode(std::move(wrapped_node)) {} |
| 26 | |
| 27 | void RRectAdapter::apply() { |
| 28 | // BM "position" == "center position" |
| 29 | auto rr = SkRRect::MakeRectXY(SkRect::MakeXYWH(fPosition.x() - fSize.width() / 2, |
| 30 | fPosition.y() - fSize.height() / 2, |
| 31 | fSize.width(), fSize.height()), |
| 32 | fRadius.width(), |
| 33 | fRadius.height()); |
| 34 | fRRectNode->setRRect(rr); |
| 35 | } |
| 36 | |
| 37 | TransformAdapter::TransformAdapter(sk_sp<sksg::Matrix> matrix) |
| 38 | : fMatrixNode(std::move(matrix)) {} |
| 39 | |
| 40 | void TransformAdapter::apply() { |
| 41 | SkMatrix t = SkMatrix::MakeTrans(-fAnchorPoint.x(), -fAnchorPoint.y()); |
| 42 | |
| 43 | t.postScale(fScale.x() / 100, fScale.y() / 100); // 100% based |
| 44 | t.postRotate(fRotation); |
| 45 | t.postTranslate(fPosition.x(), fPosition.y()); |
| 46 | // TODO: skew |
| 47 | |
| 48 | fMatrixNode->setMatrix(t); |
| 49 | } |
| 50 | |
| 51 | PolyStarAdapter::PolyStarAdapter(sk_sp<sksg::Path> wrapped_node, Type t) |
| 52 | : fPathNode(std::move(wrapped_node)) |
| 53 | , fType(t) {} |
| 54 | |
| 55 | void PolyStarAdapter::apply() { |
| 56 | const auto count = SkScalarTruncToInt(fPointCount); |
| 57 | const auto arc = SK_ScalarPI * 2 / count; |
| 58 | |
| 59 | const auto pt_on_circle = [](const SkPoint& c, SkScalar r, SkScalar a) { |
| 60 | return SkPoint::Make(c.x() + r * std::cos(a), |
| 61 | c.y() + r * std::sin(a)); |
| 62 | }; |
| 63 | |
| 64 | // TODO: inner/outer "roundness"? |
| 65 | |
| 66 | SkPath poly; |
| 67 | |
| 68 | auto angle = SkDegreesToRadians(fRotation); |
| 69 | poly.moveTo(pt_on_circle(fPosition, fOuterRadius, angle)); |
| 70 | |
| 71 | for (int i = 0; i < count; ++i) { |
| 72 | if (fType == Type::kStar) { |
| 73 | poly.lineTo(pt_on_circle(fPosition, fInnerRadius, angle + arc * 0.5f)); |
| 74 | } |
| 75 | angle += arc; |
| 76 | poly.lineTo(pt_on_circle(fPosition, fOuterRadius, angle)); |
| 77 | } |
| 78 | |
| 79 | poly.close(); |
| 80 | fPathNode->setPath(poly); |
| 81 | } |
| 82 | |
| 83 | GradientAdapter::GradientAdapter(sk_sp<sksg::Gradient> grad, size_t stopCount) |
| 84 | : fGradient(std::move(grad)) |
| 85 | , fStopCount(stopCount) {} |
| 86 | |
| 87 | void GradientAdapter::apply() { |
| 88 | this->onApply(); |
| 89 | |
| 90 | // |fColorStops| holds |fStopCount| x [ pos, r, g, g ] + ? x [ pos, alpha ] |
| 91 | |
| 92 | if (fColorStops.size() < fStopCount * 4 || ((fColorStops.size() - fStopCount * 4) % 2)) { |
| 93 | SkDebugf("!! Invalid gradient stop array size: %zu", fColorStops.size()); |
| 94 | return; |
| 95 | } |
| 96 | |
| 97 | std::vector<sksg::Gradient::ColorStop> stops; |
| 98 | |
| 99 | // TODO: merge/lerp opacity stops |
| 100 | const auto csEnd = fColorStops.cbegin() + fStopCount * 4; |
| 101 | for (auto cs = fColorStops.cbegin(); cs != csEnd; cs += 4) { |
| 102 | const auto pos = cs[0]; |
| 103 | const VectorValue rgb({ cs[1], cs[2], cs[3] }); |
| 104 | |
| 105 | stops.push_back({ pos, ValueTraits<VectorValue>::As<SkColor>(rgb) }); |
| 106 | } |
| 107 | |
| 108 | fGradient->setColorStops(std::move(stops)); |
| 109 | } |
| 110 | |
| 111 | LinearGradientAdapter::LinearGradientAdapter(sk_sp<sksg::LinearGradient> grad, size_t stopCount) |
| 112 | : INHERITED(std::move(grad), stopCount) {} |
| 113 | |
| 114 | void LinearGradientAdapter::onApply() { |
| 115 | auto* grad = static_cast<sksg::LinearGradient*>(fGradient.get()); |
| 116 | grad->setStartPoint(this->startPoint()); |
| 117 | grad->setEndPoint(this->endPoint()); |
| 118 | } |
| 119 | |
| 120 | RadialGradientAdapter::RadialGradientAdapter(sk_sp<sksg::RadialGradient> grad, size_t stopCount) |
| 121 | : INHERITED(std::move(grad), stopCount) {} |
| 122 | |
| 123 | void RadialGradientAdapter::onApply() { |
| 124 | auto* grad = static_cast<sksg::RadialGradient*>(fGradient.get()); |
| 125 | grad->setStartCenter(this->startPoint()); |
| 126 | grad->setEndCenter(this->startPoint()); |
| 127 | grad->setStartRadius(0); |
| 128 | grad->setEndRadius(SkPoint::Distance(this->startPoint(), this->endPoint())); |
| 129 | } |
| 130 | |
| 131 | TrimEffectAdapter::TrimEffectAdapter(sk_sp<sksg::TrimEffect> trimEffect) |
| 132 | : fTrimEffect(std::move(trimEffect)) { |
| 133 | SkASSERT(fTrimEffect); |
| 134 | } |
| 135 | |
| 136 | void TrimEffectAdapter::apply() { |
| 137 | // BM semantics: start/end are percentages, offset is "degrees" (?!). |
| 138 | const auto start = fStart / 100, |
| 139 | end = fEnd / 100, |
| 140 | offset = fOffset / 360; |
| 141 | |
| 142 | auto startT = SkTMin(start, end) + offset, |
| 143 | stopT = SkTMax(start, end) + offset; |
| 144 | auto mode = SkTrimPathEffect::Mode::kNormal; |
| 145 | |
| 146 | if (stopT - startT < 1) { |
| 147 | startT -= SkScalarFloorToScalar(startT); |
| 148 | stopT -= SkScalarFloorToScalar(stopT); |
| 149 | |
| 150 | if (startT > stopT) { |
| 151 | SkTSwap(startT, stopT); |
| 152 | mode = SkTrimPathEffect::Mode::kInverted; |
| 153 | } |
| 154 | } else { |
| 155 | startT = 0; |
| 156 | stopT = 1; |
| 157 | } |
| 158 | |
| 159 | fTrimEffect->setStart(startT); |
| 160 | fTrimEffect->setStop(stopT); |
| 161 | fTrimEffect->setMode(mode); |
| 162 | } |
| 163 | |
| 164 | } // namespace skottie |