@pixi/core/lib/mask/MaskSystem.js

"use strict";
var constants = require("@pixi/constants"), extensions = require("@pixi/extensions"), SpriteMaskFilter = require("../filters/spriteMask/SpriteMaskFilter.js"), MaskData = require("./MaskData.js");
class MaskSystem {
  /**
   * @param renderer - The renderer this System works for.
   */
  constructor(renderer) {
    this.renderer = renderer, this.enableScissor = !0, this.alphaMaskPool = [], this.maskDataPool = [], this.maskStack = [], this.alphaMaskIndex = 0;
  }
  /**
   * Changes the mask stack that is used by this System.
   * @param maskStack - The mask stack
   */
  setMaskStack(maskStack) {
    this.maskStack = maskStack, this.renderer.scissor.setMaskStack(maskStack), this.renderer.stencil.setMaskStack(maskStack);
  }
  /**
   * Enables the mask and appends it to the current mask stack.
   *
   * NOTE: The batch renderer should be flushed beforehand to prevent pending renders from being masked.
   * @param {PIXI.DisplayObject} target - Display Object to push the mask to
   * @param {PIXI.MaskData|PIXI.Sprite|PIXI.Graphics|PIXI.DisplayObject} maskDataOrTarget - The masking data.
   */
  push(target, maskDataOrTarget) {
    let maskData = maskDataOrTarget;
    if (!maskData.isMaskData) {
      const d = this.maskDataPool.pop() || new MaskData.MaskData();
      d.pooled = !0, d.maskObject = maskDataOrTarget, maskData = d;
    }
    const maskAbove = this.maskStack.length !== 0 ? this.maskStack[this.maskStack.length - 1] : null;
    if (maskData.copyCountersOrReset(maskAbove), maskData._colorMask = maskAbove ? maskAbove._colorMask : 15, maskData.autoDetect && this.detect(maskData), maskData._target = target, maskData.type !== constants.MASK_TYPES.SPRITE && this.maskStack.push(maskData), maskData.enabled)
      switch (maskData.type) {
        case constants.MASK_TYPES.SCISSOR:
          this.renderer.scissor.push(maskData);
          break;
        case constants.MASK_TYPES.STENCIL:
          this.renderer.stencil.push(maskData);
          break;
        case constants.MASK_TYPES.SPRITE:
          maskData.copyCountersOrReset(null), this.pushSpriteMask(maskData);
          break;
        case constants.MASK_TYPES.COLOR:
          this.pushColorMask(maskData);
          break;
        default:
          break;
      }
    maskData.type === constants.MASK_TYPES.SPRITE && this.maskStack.push(maskData);
  }
  /**
   * Removes the last mask from the mask stack and doesn't return it.
   *
   * NOTE: The batch renderer should be flushed beforehand to render the masked contents before the mask is removed.
   * @param {PIXI.IMaskTarget} target - Display Object to pop the mask from
   */
  pop(target) {
    const maskData = this.maskStack.pop();
    if (!(!maskData || maskData._target !== target)) {
      if (maskData.enabled)
        switch (maskData.type) {
          case constants.MASK_TYPES.SCISSOR:
            this.renderer.scissor.pop(maskData);
            break;
          case constants.MASK_TYPES.STENCIL:
            this.renderer.stencil.pop(maskData.maskObject);
            break;
          case constants.MASK_TYPES.SPRITE:
            this.popSpriteMask(maskData);
            break;
          case constants.MASK_TYPES.COLOR:
            this.popColorMask(maskData);
            break;
          default:
            break;
        }
      if (maskData.reset(), maskData.pooled && this.maskDataPool.push(maskData), this.maskStack.length !== 0) {
        const maskCurrent = this.maskStack[this.maskStack.length - 1];
        maskCurrent.type === constants.MASK_TYPES.SPRITE && maskCurrent._filters && (maskCurrent._filters[0].maskSprite = maskCurrent.maskObject);
      }
    }
  }
  /**
   * Sets type of MaskData based on its maskObject.
   * @param maskData
   */
  detect(maskData) {
    const maskObject = maskData.maskObject;
    maskObject ? maskObject.isSprite ? maskData.type = constants.MASK_TYPES.SPRITE : this.enableScissor && this.renderer.scissor.testScissor(maskData) ? maskData.type = constants.MASK_TYPES.SCISSOR : maskData.type = constants.MASK_TYPES.STENCIL : maskData.type = constants.MASK_TYPES.COLOR;
  }
  /**
   * Applies the Mask and adds it to the current filter stack.
   * @param maskData - Sprite to be used as the mask.
   */
  pushSpriteMask(maskData) {
    const { maskObject } = maskData, target = maskData._target;
    let alphaMaskFilter = maskData._filters;
    alphaMaskFilter || (alphaMaskFilter = this.alphaMaskPool[this.alphaMaskIndex], alphaMaskFilter || (alphaMaskFilter = this.alphaMaskPool[this.alphaMaskIndex] = [new SpriteMaskFilter.SpriteMaskFilter()])), alphaMaskFilter[0].resolution = maskData.resolution, alphaMaskFilter[0].multisample = maskData.multisample, alphaMaskFilter[0].maskSprite = maskObject;
    const stashFilterArea = target.filterArea;
    target.filterArea = maskObject.getBounds(!0), this.renderer.filter.push(target, alphaMaskFilter), target.filterArea = stashFilterArea, maskData._filters || this.alphaMaskIndex++;
  }
  /**
   * Removes the last filter from the filter stack and doesn't return it.
   * @param maskData - Sprite to be used as the mask.
   */
  popSpriteMask(maskData) {
    this.renderer.filter.pop(), maskData._filters ? maskData._filters[0].maskSprite = null : (this.alphaMaskIndex--, this.alphaMaskPool[this.alphaMaskIndex][0].maskSprite = null);
  }
  /**
   * Pushes the color mask.
   * @param maskData - The mask data
   */
  pushColorMask(maskData) {
    const currColorMask = maskData._colorMask, nextColorMask = maskData._colorMask = currColorMask & maskData.colorMask;
    nextColorMask !== currColorMask && this.renderer.gl.colorMask(
      (nextColorMask & 1) !== 0,
      (nextColorMask & 2) !== 0,
      (nextColorMask & 4) !== 0,
      (nextColorMask & 8) !== 0
    );
  }
  /**
   * Pops the color mask.
   * @param maskData - The mask data
   */
  popColorMask(maskData) {
    const currColorMask = maskData._colorMask, nextColorMask = this.maskStack.length > 0 ? this.maskStack[this.maskStack.length - 1]._colorMask : 15;
    nextColorMask !== currColorMask && this.renderer.gl.colorMask(
      (nextColorMask & 1) !== 0,
      (nextColorMask & 2) !== 0,
      (nextColorMask & 4) !== 0,
      (nextColorMask & 8) !== 0
    );
  }
  destroy() {
    this.renderer = null;
  }
}
MaskSystem.extension = {
  type: extensions.ExtensionType.RendererSystem,
  name: "mask"
};
extensions.extensions.add(MaskSystem);
exports.MaskSystem = MaskSystem;
//# sourceMappingURL=MaskSystem.js.map