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1 module doodle.dia.layer_stack;
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2
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3 public {
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4 import doodle.dia.icanvas;
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5 }
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6
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7 final class LayerStack {
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8 this(in Layer[] layers) {
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9 _layers = layers.dup;
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10 }
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11
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12 Rectangle bounds() const {
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13 // Take the union of all layer bounds
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14 Rectangle bounds = Rectangle.DEFAULT;
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15 foreach (layer; _layers) { bounds = bounds | layer.bounds; }
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16 assert(bounds.valid);
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17 return bounds;
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18 }
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19
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20 void draw(in Rectangle pixelDamage, scope Context pixelCr,
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21 in Rectangle modelDamage, scope Context modelCr) {
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22 foreach(layer; _layers) {
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23 layer.draw(pixelDamage, pixelCr, modelDamage, modelCr);
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24 }
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25 }
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26
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27 private {
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28 Layer[] _layers;
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29 }
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30 }
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