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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2498 | - | 1 | |
| 2 | namespace GMap.NET.Internals |
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| 3 | { |
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| 4 | using System; |
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| 5 | using System.Collections.Generic; |
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| 6 | using System.Diagnostics; |
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| 7 | using System.Threading; |
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| 8 | |||
| 9 | /// <summary> |
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| 10 | /// represent tile |
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| 11 | /// </summary> |
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| 12 | public struct Tile : IDisposable |
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| 13 | { |
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| 14 | public static readonly Tile Empty = new Tile(); |
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| 15 | |||
| 16 | GPoint pos; |
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| 17 | int zoom; |
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| 18 | PureImage[] overlays; |
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| 19 | long OverlaysCount; |
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| 20 | |||
| 21 | public readonly bool NotEmpty; |
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| 22 | |||
| 23 | public Tile(int zoom, GPoint pos) |
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| 24 | { |
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| 25 | this.NotEmpty = true; |
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| 26 | this.zoom = zoom; |
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| 27 | this.pos = pos; |
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| 28 | this.overlays = null; |
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| 29 | this.OverlaysCount = 0; |
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| 30 | } |
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| 31 | |||
| 32 | public IEnumerable<PureImage> Overlays |
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| 33 | { |
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| 34 | get |
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| 35 | { |
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| 36 | #if PocketPC |
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| 37 | for (long i = 0, size = OverlaysCount; i < size; i++) |
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| 38 | #else |
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| 39 | for (long i = 0, size = Interlocked.Read(ref OverlaysCount); i < size; i++) |
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| 40 | #endif |
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| 41 | { |
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| 42 | yield return overlays[i]; |
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| 43 | } |
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| 44 | } |
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| 45 | } |
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| 46 | |||
| 47 | internal void AddOverlay(PureImage i) |
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| 48 | { |
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| 49 | if (overlays == null) |
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| 50 | { |
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| 51 | overlays = new PureImage[4]; |
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| 52 | } |
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| 53 | #if !PocketPC |
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| 54 | overlays[Interlocked.Increment(ref OverlaysCount) - 1] = i; |
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| 55 | #else |
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| 56 | overlays[++OverlaysCount - 1] = i; |
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| 57 | #endif |
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| 58 | } |
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| 59 | |||
| 60 | internal bool HasAnyOverlays |
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| 61 | { |
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| 62 | get |
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| 63 | { |
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| 64 | #if PocketPC |
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| 65 | return OverlaysCount > 0; |
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| 66 | #else |
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| 67 | return Interlocked.Read(ref OverlaysCount) > 0; |
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| 68 | #endif |
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| 69 | } |
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| 70 | } |
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| 71 | |||
| 72 | public int Zoom |
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| 73 | { |
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| 74 | get |
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| 75 | { |
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| 76 | return zoom; |
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| 77 | } |
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| 78 | private set |
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| 79 | { |
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| 80 | zoom = value; |
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| 81 | } |
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| 82 | } |
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| 83 | |||
| 84 | public GPoint Pos |
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| 85 | { |
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| 86 | get |
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| 87 | { |
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| 88 | return pos; |
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| 89 | } |
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| 90 | private set |
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| 91 | { |
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| 92 | pos = value; |
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| 93 | } |
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| 94 | } |
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| 95 | |||
| 96 | #region IDisposable Members |
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| 97 | |||
| 98 | public void Dispose() |
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| 99 | { |
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| 100 | if (overlays != null) |
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| 101 | { |
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| 102 | #if PocketPC |
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| 103 | for (long i = OverlaysCount - 1; i >= 0; i--) |
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| 104 | |||
| 105 | #else |
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| 106 | for (long i = Interlocked.Read(ref OverlaysCount) - 1; i >= 0; i--) |
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| 107 | #endif |
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| 108 | { |
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| 109 | #if !PocketPC |
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| 110 | Interlocked.Decrement(ref OverlaysCount); |
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| 111 | #else |
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| 112 | OverlaysCount--; |
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| 113 | #endif |
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| 114 | overlays[i].Dispose(); |
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| 115 | overlays[i] = null; |
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| 116 | } |
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| 117 | overlays = null; |
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| 118 | } |
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| 119 | } |
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| 120 | |||
| 121 | #endregion |
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| 122 | |||
| 123 | public static bool operator ==(Tile m1, Tile m2) |
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| 124 | { |
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| 125 | return m1.pos == m2.pos && m1.zoom == m2.zoom; |
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| 126 | } |
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| 127 | |||
| 128 | public static bool operator !=(Tile m1, Tile m2) |
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| 129 | { |
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| 130 | return !(m1 == m2); |
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| 131 | } |
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| 132 | |||
| 133 | public override bool Equals(object obj) |
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| 134 | { |
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| 135 | if (!(obj is Tile)) |
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| 136 | return false; |
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| 137 | |||
| 138 | Tile comp = (Tile)obj; |
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| 139 | return comp.Zoom == this.Zoom && comp.Pos == this.Pos; |
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| 140 | } |
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| 141 | |||
| 142 | public override int GetHashCode() |
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| 143 | { |
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| 144 | return zoom ^ pos.GetHashCode(); |
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| 145 | } |
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| 146 | } |
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| 147 | } |