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node_modules/pixi.js/lib/rendering/renderers/shared/texture/CanvasPool.js

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+'use strict';
+
+var adapter = require('../../../../environment/adapter.js');
+var pow2 = require('../../../../maths/misc/pow2.js');
+
+"use strict";
+class CanvasPoolClass {
+  constructor(canvasOptions) {
+    this._canvasPool = /* @__PURE__ */ Object.create(null);
+    this.canvasOptions = canvasOptions || {};
+    this.enableFullScreen = false;
+  }
+  /**
+   * Creates texture with params that were specified in pool constructor.
+   * @param pixelWidth - Width of texture in pixels.
+   * @param pixelHeight - Height of texture in pixels.
+   */
+  _createCanvasAndContext(pixelWidth, pixelHeight) {
+    const canvas = adapter.DOMAdapter.get().createCanvas();
+    canvas.width = pixelWidth;
+    canvas.height = pixelHeight;
+    const context = canvas.getContext("2d");
+    return { canvas, context };
+  }
+  /**
+   * Gets a Power-of-Two render texture or fullScreen texture
+   * @param minWidth - The minimum width of the render texture.
+   * @param minHeight - The minimum height of the render texture.
+   * @param resolution - The resolution of the render texture.
+   * @returns The new render texture.
+   */
+  getOptimalCanvasAndContext(minWidth, minHeight, resolution = 1) {
+    minWidth = Math.ceil(minWidth * resolution - 1e-6);
+    minHeight = Math.ceil(minHeight * resolution - 1e-6);
+    minWidth = pow2.nextPow2(minWidth);
+    minHeight = pow2.nextPow2(minHeight);
+    const key = (minWidth << 17) + (minHeight << 1);
+    if (!this._canvasPool[key]) {
+      this._canvasPool[key] = [];
+    }
+    let canvasAndContext = this._canvasPool[key].pop();
+    if (!canvasAndContext) {
+      canvasAndContext = this._createCanvasAndContext(minWidth, minHeight);
+    }
+    return canvasAndContext;
+  }
+  /**
+   * Place a render texture back into the pool.
+   * @param canvasAndContext
+   */
+  returnCanvasAndContext(canvasAndContext) {
+    const canvas = canvasAndContext.canvas;
+    const { width, height } = canvas;
+    const key = (width << 17) + (height << 1);
+    this._canvasPool[key].push(canvasAndContext);
+  }
+  clear() {
+    this._canvasPool = {};
+  }
+}
+const CanvasPool = new CanvasPoolClass();
+
+exports.CanvasPool = CanvasPool;
+exports.CanvasPoolClass = CanvasPoolClass;
+//# sourceMappingURL=CanvasPool.js.map