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561 行
18 KiB

using System;
using System.Collections.Generic;
using System.Linq;
using Unity.UIWidgets.foundation;
using Unity.UIWidgets.external;
using Unity.UIWidgets.ui;
using UnityEngine;
using Color = Unity.UIWidgets.ui.Color;
using Rect = Unity.UIWidgets.ui.Rect;
namespace Unity.UIWidgets.painting {
class _ColorsAndStops {
public _ColorsAndStops(List<Color> colors, List<float> stops) {
this.colors = colors;
this.stops = stops;
}
public readonly List<Color> colors;
public readonly List<float> stops;
static Color _sample(List<Color> colors, List<float> stops, float t) {
D.assert(colors != null);
D.assert(colors.isNotEmpty);
D.assert(stops != null);
D.assert(stops.isNotEmpty);
if (t < stops.first()) {
return colors.first();
}
if (t > stops.last()) {
return colors.last();
}
int index = stops.FindLastIndex((float s) => { return s <= t; });
D.assert(index != -1);
return Color.lerp(colors[index], colors[index + 1],
(t - stops[index]) / (stops[index + 1] - stops[index]));
}
internal static _ColorsAndStops _interpolateColorsAndStops(
List<Color> aColors,
List<float> aStops,
List<Color> bColors,
List<float> bStops,
float t) {
D.assert(aColors.Count >= 2);
D.assert(bColors.Count >= 2);
D.assert(aStops.Count == aColors.Count);
D.assert(bStops.Count == bColors.Count);
SplayTree<float, bool> stops = new SplayTree<float, bool>();
stops.AddAll(aStops);
stops.AddAll(bStops);
List<float> interpolatedStops = stops.Keys.ToList();
List<Color> interpolatedColors = interpolatedStops.Select<float, Color>((float stop) => {
return Color.lerp(_sample(aColors, aStops, stop), _sample(bColors, bStops, stop), t);
}).ToList();
return new _ColorsAndStops(interpolatedColors, interpolatedStops);
}
}
public abstract class Gradient {
public Gradient(
List<Color> colors = null,
List<float> stops = null
) {
D.assert(colors != null);
this.colors = colors;
this.stops = stops;
}
public readonly List<Color> colors;
public readonly List<float> stops;
protected List<float> _impliedStops() {
if (this.stops != null) {
return this.stops;
}
D.assert(this.colors.Count >= 2, () => "colors list must have at least two colors");
float separation = 1.0f / (this.colors.Count - 1);
return Enumerable.Range(0, this.colors.Count).Select(i => i * separation).ToList();
}
public abstract PaintShader createShader(Rect rect);
public abstract Gradient scale(float factor);
protected virtual Gradient lerpFrom(Gradient a, float t) {
if (a == null) {
return this.scale(t);
}
return null;
}
protected virtual Gradient lerpTo(Gradient b, float t) {
if (b == null) {
return this.scale(1.0f - t);
}
return null;
}
public static Gradient lerp(Gradient a, Gradient b, float t) {
Gradient result = null;
if (b != null) {
result = b.lerpFrom(a, t); // if a is null, this must return non-null
}
if (result == null && a != null) {
result = a.lerpTo(b, t); // if b is null, this must return non-null
}
if (result != null) {
return result;
}
if (a == null && b == null) {
return null;
}
D.assert(a != null && b != null);
return t < 0.5 ? a.scale(1.0f - (t * 2.0f)) : b.scale((t - 0.5f) * 2.0f);
}
}
public class LinearGradient : Gradient, IEquatable<LinearGradient> {
public LinearGradient(
Alignment begin = null,
Alignment end = null,
List<Color> colors = null,
List<float> stops = null,
TileMode tileMode = TileMode.clamp
) : base(colors: colors, stops: stops) {
this.begin = begin ?? Alignment.centerLeft;
this.end = end ?? Alignment.centerRight;
this.tileMode = tileMode;
}
public readonly Alignment begin;
public readonly Alignment end;
public readonly TileMode tileMode;
public override PaintShader createShader(Rect rect) {
return ui.Gradient.linear(
this.begin.withinRect(rect),
this.end.withinRect(rect),
this.colors, this._impliedStops(),
this.tileMode
);
}
public override Gradient scale(float factor) {
return new LinearGradient(
begin: this.begin,
end: this.end,
colors: this.colors.Select(color => Color.lerp(null, color, factor)).ToList(),
stops: this.stops,
tileMode: this.tileMode
);
}
protected override Gradient lerpFrom(Gradient a, float t) {
if (a == null || (a is LinearGradient)) {
return lerp((LinearGradient) a, this, t);
}
return base.lerpFrom(a, t);
}
protected override Gradient lerpTo(Gradient b, float t) {
if (b == null || (b is LinearGradient)) {
return lerp(this, (LinearGradient) b, t);
}
return base.lerpTo(b, t);
}
public static LinearGradient lerp(LinearGradient a, LinearGradient b, float t) {
if (a == null && b == null) {
return null;
}
if (a == null) {
return (LinearGradient) b.scale(t);
}
if (b == null) {
return (LinearGradient) a.scale(1.0f - t);
}
_ColorsAndStops interpolated = _ColorsAndStops._interpolateColorsAndStops(
a.colors,
a._impliedStops(),
b.colors,
b._impliedStops(),
t);
return new LinearGradient(
begin: Alignment.lerp(a.begin, b.begin, t),
end: Alignment.lerp(a.end, b.end, t),
colors: interpolated.colors,
stops: interpolated.stops,
tileMode: t < 0.5 ? a.tileMode : b.tileMode
);
}
public bool Equals(LinearGradient other) {
if (ReferenceEquals(null, other)) {
return false;
}
if (ReferenceEquals(this, other)) {
return true;
}
return
this.colors.equalsList(other.colors) &&
this.stops.equalsList(other.stops) &&
Equals(this.begin, other.begin) &&
Equals(this.end, other.end) &&
this.tileMode == other.tileMode;
}
public override bool Equals(object obj) {
if (ReferenceEquals(null, obj)) {
return false;
}
if (ReferenceEquals(this, obj)) {
return true;
}
if (obj.GetType() != this.GetType()) {
return false;
}
return this.Equals((LinearGradient) obj);
}
public override int GetHashCode() {
unchecked {
var hashCode = this.colors.hashList();
hashCode = (hashCode * 397) ^ this.stops.hashList();
hashCode = (hashCode * 397) ^ (this.begin != null ? this.begin.GetHashCode() : 0);
hashCode = (hashCode * 397) ^ (this.end != null ? this.end.GetHashCode() : 0);
hashCode = (hashCode * 397) ^ (int) this.tileMode;
return hashCode;
}
}
public static bool operator ==(LinearGradient left, LinearGradient right) {
return Equals(left, right);
}
public static bool operator !=(LinearGradient left, LinearGradient right) {
return !Equals(left, right);
}
public override string ToString() {
return $"{this.GetType()}({this.begin}, {this.end}," +
$"{this.colors.toStringList()}, {this.stops.toStringList()}, {this.tileMode})";
}
}
public class RadialGradient : Gradient, IEquatable<RadialGradient> {
public RadialGradient(
Alignment center = null,
float radius = 0.5f,
List<Color> colors = null,
List<float> stops = null,
TileMode tileMode = TileMode.clamp
) : base(colors: colors, stops: stops) {
this.center = center ?? Alignment.center;
this.radius = radius;
this.tileMode = tileMode;
}
public readonly Alignment center;
public readonly float radius;
public readonly TileMode tileMode;
public override PaintShader createShader(Rect rect) {
return ui.Gradient.radial(
this.center.withinRect(rect),
this.radius * rect.shortestSide,
this.colors, this._impliedStops(),
this.tileMode
);
}
public override Gradient scale(float factor) {
return new RadialGradient(
center: this.center,
radius: this.radius,
colors: this.colors.Select(color => Color.lerp(null, color, factor)).ToList(),
stops: this.stops,
tileMode: this.tileMode
);
}
protected override Gradient lerpFrom(Gradient a, float t) {
if (a == null || (a is RadialGradient)) {
return lerp((RadialGradient) a, this, t);
}
return base.lerpFrom(a, t);
}
protected override Gradient lerpTo(Gradient b, float t) {
if (b == null || (b is RadialGradient)) {
return lerp(this, (RadialGradient) b, t);
}
return base.lerpTo(b, t);
}
public static RadialGradient lerp(RadialGradient a, RadialGradient b, float t) {
if (a == null && b == null) {
return null;
}
if (a == null) {
return (RadialGradient) b.scale(t);
}
if (b == null) {
return (RadialGradient) a.scale(1.0f - t);
}
_ColorsAndStops interpolated = _ColorsAndStops._interpolateColorsAndStops(
a.colors,
a._impliedStops(),
b.colors,
b._impliedStops(),
t);
return new RadialGradient(
center: Alignment.lerp(a.center, b.center, t),
radius: Mathf.Max(0.0f, MathUtils.lerpFloat(a.radius, b.radius, t)),
colors: interpolated.colors,
stops: interpolated.stops,
tileMode: t < 0.5 ? a.tileMode : b.tileMode
);
}
public bool Equals(RadialGradient other) {
if (ReferenceEquals(null, other)) {
return false;
}
if (ReferenceEquals(this, other)) {
return true;
}
return
this.colors.equalsList(other.colors) &&
this.stops.equalsList(other.stops) &&
Equals(this.center, other.center) &&
Equals(this.radius, other.radius) &&
this.tileMode == other.tileMode;
}
public override bool Equals(object obj) {
if (ReferenceEquals(null, obj)) {
return false;
}
if (ReferenceEquals(this, obj)) {
return true;
}
if (obj.GetType() != this.GetType()) {
return false;
}
return this.Equals((RadialGradient) obj);
}
public override int GetHashCode() {
unchecked {
var hashCode = this.colors.hashList();
hashCode = (hashCode * 397) ^ this.stops.hashList();
hashCode = (hashCode * 397) ^ (this.center != null ? this.center.GetHashCode() : 0);
hashCode = (hashCode * 397) ^ this.radius.GetHashCode();
hashCode = (hashCode * 397) ^ (int) this.tileMode;
return hashCode;
}
}
public static bool operator ==(RadialGradient left, RadialGradient right) {
return Equals(left, right);
}
public static bool operator !=(RadialGradient left, RadialGradient right) {
return !Equals(left, right);
}
public override string ToString() {
return $"{this.GetType()}({this.center}, {this.radius}," +
$"{this.colors.toStringList()}, {this.stops.toStringList()}, {this.tileMode})";
}
}
public class SweepGradient : Gradient, IEquatable<SweepGradient> {
public SweepGradient(
Alignment center = null,
float startAngle = 0.0f,
float endAngle = Mathf.PI * 2,
List<Color> colors = null,
List<float> stops = null,
TileMode tileMode = TileMode.clamp
) : base(colors: colors, stops: stops) {
this.center = center ?? Alignment.center;
this.startAngle = startAngle;
this.endAngle = endAngle;
this.tileMode = tileMode;
}
public readonly Alignment center;
public readonly float startAngle;
public readonly float endAngle;
public readonly TileMode tileMode;
public override PaintShader createShader(Rect rect) {
return ui.Gradient.sweep(
this.center.withinRect(rect),
this.colors, this._impliedStops(),
this.tileMode,
this.startAngle, this.endAngle
);
}
public override Gradient scale(float factor) {
return new SweepGradient(
center: this.center,
startAngle: this.startAngle,
endAngle: this.endAngle,
colors: this.colors.Select(color => Color.lerp(null, color, factor)).ToList(),
stops: this.stops,
tileMode: this.tileMode
);
}
protected override Gradient lerpFrom(Gradient a, float t) {
if (a == null || (a is SweepGradient && a.colors.Count == this.colors.Count)) {
return lerp((SweepGradient) a, this, t);
}
return base.lerpFrom(a, t);
}
protected override Gradient lerpTo(Gradient b, float t) {
if (b == null || (b is SweepGradient && b.colors.Count == this.colors.Count)) {
return lerp(this, (SweepGradient) b, t);
}
return base.lerpTo(b, t);
}
public static SweepGradient lerp(SweepGradient a, SweepGradient b, float t) {
if (a == null && b == null) {
return null;
}
if (a == null) {
return (SweepGradient) b.scale(t);
}
if (b == null) {
return (SweepGradient) a.scale(1.0f - t);
}
_ColorsAndStops interpolated =
_ColorsAndStops._interpolateColorsAndStops(a.colors, a.stops, b.colors, b.stops, t);
return new SweepGradient(
center: Alignment.lerp(a.center, b.center, t),
startAngle: Mathf.Max(0.0f, MathUtils.lerpFloat(a.startAngle, b.startAngle, t)),
endAngle: Mathf.Max(0.0f, MathUtils.lerpFloat(a.endAngle, b.endAngle, t)),
colors: interpolated.colors,
stops: interpolated.stops,
tileMode: t < 0.5 ? a.tileMode : b.tileMode
);
}
public bool Equals(SweepGradient other) {
if (ReferenceEquals(null, other)) {
return false;
}
if (ReferenceEquals(this, other)) {
return true;
}
return
this.colors.equalsList(other.colors) &&
this.stops.equalsList(other.stops) &&
Equals(this.center, other.center) &&
Equals(this.startAngle, other.startAngle) &&
Equals(this.endAngle, other.endAngle) &&
this.tileMode == other.tileMode;
}
public override bool Equals(object obj) {
if (ReferenceEquals(null, obj)) {
return false;
}
if (ReferenceEquals(this, obj)) {
return true;
}
if (obj.GetType() != this.GetType()) {
return false;
}
return this.Equals((SweepGradient) obj);
}
public override int GetHashCode() {
unchecked {
var hashCode = this.colors.hashList();
hashCode = (hashCode * 397) ^ this.stops.hashList();
hashCode = (hashCode * 397) ^ (this.center != null ? this.center.GetHashCode() : 0);
hashCode = (hashCode * 397) ^ this.startAngle.GetHashCode();
hashCode = (hashCode * 397) ^ this.endAngle.GetHashCode();
hashCode = (hashCode * 397) ^ (int) this.tileMode;
return hashCode;
}
}
public static bool operator ==(SweepGradient left, SweepGradient right) {
return Equals(left, right);
}
public static bool operator !=(SweepGradient left, SweepGradient right) {
return !Equals(left, right);
}
public override string ToString() {
return $"{this.GetType()}({this.center}, {this.startAngle}, {this.endAngle}, " +
$"{this.colors.toStringList()}, {this.stops.toStringList()}, {this.tileMode})";
}
}
}