swOperation/node_modules/@antv/g-plugin-canvas-renderer/dist/index.esm.js

import { ElementEvent, AABB, CustomEvent, CanvasEvent, Shape, isPattern, GradientType, runtime, AbstractRendererPlugin } from '@antv/g-lite';
import { isNil, isString } from '@antv/util';
import { mat4, vec3 } from 'gl-matrix';

function _extends() {
  _extends = Object.assign ? Object.assign.bind() : function (target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i];
      for (var key in source) {
        if (Object.prototype.hasOwnProperty.call(source, key)) {
          target[key] = source[key];
        }
      }
    }
    return target;
  };
  return _extends.apply(this, arguments);
}
function _inheritsLoose(subClass, superClass) {
  subClass.prototype = Object.create(superClass.prototype);
  subClass.prototype.constructor = subClass;
  _setPrototypeOf(subClass, superClass);
}
function _setPrototypeOf(o, p) {
  _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function _setPrototypeOf(o, p) {
    o.__proto__ = p;
    return o;
  };
  return _setPrototypeOf(o, p);
}

/**
 * support 2 modes in rendering:
 * * immediate
 * * delayed: render at the end of frame with dirty-rectangle
 */
var CanvasRendererPlugin = /*#__PURE__*/function () {
  function CanvasRendererPlugin(canvasRendererPluginOptions) {
    this.canvasRendererPluginOptions = void 0;
    this.context = void 0;
    this.pathGeneratorFactory = void 0;
    /**
     * RBush used in dirty rectangle rendering
     */
    this.rBush = void 0;
    this.removedRBushNodeAABBs = [];
    this.renderQueue = [];
    /**
     * This stack is only used by clipPath for now.
     */
    this.restoreStack = [];
    this.clearFullScreen = false;
    /**
     * view projection matrix
     */
    this.vpMatrix = mat4.create();
    this.dprMatrix = mat4.create();
    this.tmpMat4 = mat4.create();
    this.vec3a = vec3.create();
    this.vec3b = vec3.create();
    this.vec3c = vec3.create();
    this.vec3d = vec3.create();
    this.canvasRendererPluginOptions = canvasRendererPluginOptions;
  }
  var _proto = CanvasRendererPlugin.prototype;
  _proto.apply = function apply(context, runtime) {
    var _this = this;
    this.context = context;
    var config = context.config,
      camera = context.camera,
      renderingService = context.renderingService,
      renderingContext = context.renderingContext,
      rBushRoot = context.rBushRoot,
      pathGeneratorFactory = context.pathGeneratorFactory;
    this.rBush = rBushRoot;
    this.pathGeneratorFactory = pathGeneratorFactory;
    var contextService = context.contextService;
    var canvas = renderingContext.root.ownerDocument.defaultView;
    var handleUnmounted = function handleUnmounted(e) {
      var object = e.target;
      // remove r-bush node
      // @ts-ignore
      var rBushNode = object.rBushNode;
      if (rBushNode.aabb) {
        // save removed aabbs for dirty-rectangle rendering later
        _this.removedRBushNodeAABBs.push(rBushNode.aabb);
      }
    };
    var handleCulled = function handleCulled(e) {
      var object = e.target;
      // @ts-ignore
      var rBushNode = object.rBushNode;
      if (rBushNode.aabb) {
        // save removed aabbs for dirty-rectangle rendering later
        _this.removedRBushNodeAABBs.push(rBushNode.aabb);
      }
    };
    renderingService.hooks.init.tap(CanvasRendererPlugin.tag, function () {
      canvas.addEventListener(ElementEvent.UNMOUNTED, handleUnmounted);
      canvas.addEventListener(ElementEvent.CULLED, handleCulled);
      // clear fullscreen
      var dpr = contextService.getDPR();
      var width = config.width,
        height = config.height;
      var context = contextService.getContext();
      _this.clearRect(context, 0, 0, width * dpr, height * dpr, config.background);
    });
    renderingService.hooks.destroy.tap(CanvasRendererPlugin.tag, function () {
      canvas.removeEventListener(ElementEvent.UNMOUNTED, handleUnmounted);
      canvas.removeEventListener(ElementEvent.CULLED, handleCulled);
      // this.renderQueue = [];
      // this.removedRBushNodeAABBs = [];
      // this.restoreStack = [];
    });

    renderingService.hooks.beginFrame.tap(CanvasRendererPlugin.tag, function () {
      var context = contextService.getContext();
      var dpr = contextService.getDPR();
      var width = config.width,
        height = config.height;
      var _this$canvasRendererP = _this.canvasRendererPluginOptions,
        dirtyObjectNumThreshold = _this$canvasRendererP.dirtyObjectNumThreshold,
        dirtyObjectRatioThreshold = _this$canvasRendererP.dirtyObjectRatioThreshold;
      // some heuristic conditions such as 80% object changed
      var _renderingService$get = renderingService.getStats(),
        total = _renderingService$get.total,
        rendered = _renderingService$get.rendered;
      var ratio = rendered / total;
      _this.clearFullScreen = renderingService.disableDirtyRectangleRendering() || rendered > dirtyObjectNumThreshold && ratio > dirtyObjectRatioThreshold;
      if (context) {
        context.resetTransform ? context.resetTransform() : context.setTransform(1, 0, 0, 1, 0, 0);
        if (_this.clearFullScreen) {
          _this.clearRect(context, 0, 0, width * dpr, height * dpr, config.background);
        }
      }
    });
    var renderByZIndex = function renderByZIndex(object, context) {
      if (object.isVisible() && !object.isCulled()) {
        _this.renderDisplayObject(object, context, _this.context, _this.restoreStack, runtime);
        // if (object.renderable.) {
        // if we did a full screen rendering last frame
        _this.saveDirtyAABB(object);
        // }
      }

      var sorted = object.sortable.sorted || object.childNodes;
      // should account for z-index
      sorted.forEach(function (child) {
        renderByZIndex(child, context);
      });
    };
    // render at the end of frame
    renderingService.hooks.endFrame.tap(CanvasRendererPlugin.tag, function () {
      var context = contextService.getContext();
      // clear & clip dirty rectangle
      var dpr = contextService.getDPR();
      mat4.fromScaling(_this.dprMatrix, [dpr, dpr, 1]);
      mat4.multiply(_this.vpMatrix, _this.dprMatrix, camera.getOrthoMatrix());
      // if (this.clearFullScreen) {
      if (_this.clearFullScreen) {
        // console.log('canvas renderer fcp...');
        renderByZIndex(renderingContext.root, context);
      } else {
        // console.log('canvas renderer next...');
        // merge removed AABB
        var dirtyRenderBounds = _this.safeMergeAABB.apply(_this, [_this.mergeDirtyAABBs(_this.renderQueue)].concat(_this.removedRBushNodeAABBs.map(function (_ref) {
          var minX = _ref.minX,
            minY = _ref.minY,
            maxX = _ref.maxX,
            maxY = _ref.maxY;
          var aabb = new AABB();
          aabb.setMinMax(
          // vec3.fromValues(minX, minY, 0),
          // vec3.fromValues(maxX, maxY, 0),
          [minX, minY, 0], [maxX, maxY, 0]);
          return aabb;
        })));
        _this.removedRBushNodeAABBs = [];
        if (AABB.isEmpty(dirtyRenderBounds)) {
          _this.renderQueue = [];
          return;
        }
        var dirtyRect = _this.convertAABB2Rect(dirtyRenderBounds);
        var x = dirtyRect.x,
          y = dirtyRect.y,
          width = dirtyRect.width,
          height = dirtyRect.height;
        var tl = vec3.transformMat4(_this.vec3a, [x, y, 0], _this.vpMatrix);
        var tr = vec3.transformMat4(_this.vec3b, [x + width, y, 0], _this.vpMatrix);
        var bl = vec3.transformMat4(_this.vec3c, [x, y + height, 0], _this.vpMatrix);
        var br = vec3.transformMat4(_this.vec3d, [x + width, y + height, 0], _this.vpMatrix);
        var minx = Math.min(tl[0], tr[0], br[0], bl[0]);
        var miny = Math.min(tl[1], tr[1], br[1], bl[1]);
        var maxx = Math.max(tl[0], tr[0], br[0], bl[0]);
        var maxy = Math.max(tl[1], tr[1], br[1], bl[1]);
        var ix = Math.floor(minx);
        var iy = Math.floor(miny);
        var iwidth = Math.ceil(maxx - minx);
        var iheight = Math.ceil(maxy - miny);
        context.save();
        _this.clearRect(context, ix, iy, iwidth, iheight, config.background);
        context.beginPath();
        context.rect(ix, iy, iwidth, iheight);
        context.clip();
        // @see https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API/Tutorial/Transformations
        context.setTransform(_this.vpMatrix[0], _this.vpMatrix[1], _this.vpMatrix[4], _this.vpMatrix[5], _this.vpMatrix[12], _this.vpMatrix[13]);
        // draw dirty rectangle
        var _config$renderer$getC = config.renderer.getConfig(),
          enableDirtyRectangleRenderingDebug = _config$renderer$getC.enableDirtyRectangleRenderingDebug;
        if (enableDirtyRectangleRenderingDebug) {
          canvas.dispatchEvent(new CustomEvent(CanvasEvent.DIRTY_RECTANGLE, {
            dirtyRect: {
              x: ix,
              y: iy,
              width: iwidth,
              height: iheight
            }
          }));
        }
        // search objects intersect with dirty rectangle
        var dirtyObjects = _this.searchDirtyObjects(dirtyRenderBounds);
        // do rendering
        dirtyObjects
        // sort by z-index
        .sort(function (a, b) {
          return a.sortable.renderOrder - b.sortable.renderOrder;
        }).forEach(function (object) {
          // culled object should not be rendered
          if (object && object.isVisible() && !object.isCulled()) {
            _this.renderDisplayObject(object, context, _this.context, _this.restoreStack, runtime);
          }
        });
        context.restore();
        // save dirty AABBs in last frame
        _this.renderQueue.forEach(function (object) {
          _this.saveDirtyAABB(object);
        });
        // clear queue
        _this.renderQueue = [];
      }
      // pop restore stack, eg. root -> parent -> child
      _this.restoreStack.forEach(function () {
        context.restore();
      });
      // clear restore stack
      _this.restoreStack = [];
    });
    renderingService.hooks.render.tap(CanvasRendererPlugin.tag, function (object) {
      if (!_this.clearFullScreen) {
        // render at the end of frame
        _this.renderQueue.push(object);
      }
    });
  };
  _proto.clearRect = function clearRect(context, x, y, width, height, background) {
    // clearRect is faster than fillRect @see https://stackoverflow.com/a/30830253
    context.clearRect(x, y, width, height);
    if (background) {
      context.fillStyle = background;
      context.fillRect(x, y, width, height);
    }
  };
  _proto.renderDisplayObject = function renderDisplayObject(object, context, canvasContext, restoreStack, runtime) {
    var nodeName = object.nodeName;
    // console.log('canvas render:', object);
    // restore to its ancestor
    var parent = restoreStack[restoreStack.length - 1];
    if (parent && !(object.compareDocumentPosition(parent) & Node.DOCUMENT_POSITION_CONTAINS)) {
      context.restore();
      restoreStack.pop();
    }
    // @ts-ignore
    var styleRenderer = this.context.styleRendererFactory[nodeName];
    var generatePath = this.pathGeneratorFactory[nodeName];
    // clip path
    var clipPath = object.parsedStyle.clipPath;
    if (clipPath) {
      this.applyWorldTransform(context, clipPath);
      // generate path in local space
      var _generatePath = this.pathGeneratorFactory[clipPath.nodeName];
      if (_generatePath) {
        context.save();
        // save clip
        restoreStack.push(object);
        context.beginPath();
        _generatePath(context, clipPath.parsedStyle);
        context.closePath();
        context.clip();
      }
    }
    // fill & stroke
    if (styleRenderer) {
      this.applyWorldTransform(context, object);
      context.save();
      // apply attributes to context
      this.applyAttributesToContext(context, object);
    }
    if (generatePath) {
      context.beginPath();
      generatePath(context, object.parsedStyle);
      if (object.nodeName !== Shape.LINE && object.nodeName !== Shape.PATH && object.nodeName !== Shape.POLYLINE) {
        context.closePath();
      }
    }
    // fill & stroke
    if (styleRenderer) {
      styleRenderer.render(context, object.parsedStyle, object, canvasContext, this, runtime);
      // restore applied attributes, eg. shadowBlur shadowColor...
      context.restore();
    }
    // finish rendering, clear dirty flag
    object.renderable.dirty = false;
  };
  _proto.convertAABB2Rect = function convertAABB2Rect(aabb) {
    var min = aabb.getMin();
    var max = aabb.getMax();
    // expand the rectangle a bit to avoid artifacts
    // @see https://www.yuque.com/antv/ou292n/bi8nix#ExvCu
    var minX = Math.floor(min[0]);
    var minY = Math.floor(min[1]);
    var maxX = Math.ceil(max[0]);
    var maxY = Math.ceil(max[1]);
    var width = maxX - minX;
    var height = maxY - minY;
    return {
      x: minX,
      y: minY,
      width: width,
      height: height
    };
  }
  /**
   * TODO: merge dirty rectangles with some strategies.
   * For now, we just simply merge all the rectangles into one.
   * @see https://idom.me/articles/841.html
   */;
  _proto.mergeDirtyAABBs = function mergeDirtyAABBs(dirtyObjects) {
    // merge into a big AABB
    // TODO: skip descendant if ancestor is caculated, but compareNodePosition is really slow
    var aabb = new AABB();
    dirtyObjects.forEach(function (object) {
      var renderBounds = object.getRenderBounds();
      aabb.add(renderBounds);
      var dirtyRenderBounds = object.renderable.dirtyRenderBounds;
      if (dirtyRenderBounds) {
        aabb.add(dirtyRenderBounds);
      }
    });
    return aabb;
  };
  _proto.searchDirtyObjects = function searchDirtyObjects(dirtyRectangle) {
    // search in r-tree, get all affected nodes
    var _dirtyRectangle$getMi = dirtyRectangle.getMin(),
      minX = _dirtyRectangle$getMi[0],
      minY = _dirtyRectangle$getMi[1];
    var _dirtyRectangle$getMa = dirtyRectangle.getMax(),
      maxX = _dirtyRectangle$getMa[0],
      maxY = _dirtyRectangle$getMa[1];
    var rBushNodes = this.rBush.search({
      minX: minX,
      minY: minY,
      maxX: maxX,
      maxY: maxY
    });
    return rBushNodes.map(function (_ref2) {
      var displayObject = _ref2.displayObject;
      return displayObject;
    });
  };
  _proto.saveDirtyAABB = function saveDirtyAABB(object) {
    var renderable = object.renderable;
    if (!renderable.dirtyRenderBounds) {
      renderable.dirtyRenderBounds = new AABB();
    }
    var renderBounds = object.getRenderBounds();
    if (renderBounds) {
      // save last dirty aabb
      renderable.dirtyRenderBounds.update(renderBounds.center, renderBounds.halfExtents);
    }
  }
  /**
   * TODO: batch the same global attributes
   */;
  _proto.applyAttributesToContext = function applyAttributesToContext(context, object) {
    var _object$parsedStyle = object.parsedStyle,
      stroke = _object$parsedStyle.stroke,
      fill = _object$parsedStyle.fill,
      opacity = _object$parsedStyle.opacity,
      lineDash = _object$parsedStyle.lineDash,
      lineDashOffset = _object$parsedStyle.lineDashOffset;
    // @see https://developer.mozilla.org/zh-CN/docs/Web/API/CanvasRenderingContext2D/setLineDash
    if (lineDash) {
      context.setLineDash(lineDash);
    }
    // @see https://developer.mozilla.org/zh-CN/docs/Web/API/CanvasRenderingContext2D/lineDashOffset
    if (!isNil(lineDashOffset)) {
      context.lineDashOffset = lineDashOffset;
    }
    if (!isNil(opacity)) {
      context.globalAlpha *= opacity;
    }
    if (!isNil(stroke) && !Array.isArray(stroke) && !stroke.isNone) {
      context.strokeStyle = object.attributes.stroke;
    }
    if (!isNil(fill) && !Array.isArray(fill) && !fill.isNone) {
      context.fillStyle = object.attributes.fill;
    }
  };
  _proto.applyWorldTransform = function applyWorldTransform(context, object, matrix) {
    var tx = 0;
    var ty = 0;
    var _ref3 = object.parsedStyle || {},
      anchor = _ref3.anchor;
    var anchorX = anchor && anchor[0] || 0;
    var anchorY = anchor && anchor[1] || 0;
    if (anchorX !== 0 || anchorY !== 0) {
      // const bounds = object.getGeometryBounds();
      var bounds = object.geometry.contentBounds;
      var width = bounds && bounds.halfExtents[0] * 2 || 0;
      var height = bounds && bounds.halfExtents[1] * 2 || 0;
      tx = -(anchorX * width);
      ty = -(anchorY * height);
    }
    // apply clip shape's RTS
    if (matrix) {
      mat4.copy(this.tmpMat4, object.getLocalTransform());
      this.vec3a[0] = tx;
      this.vec3a[1] = ty;
      this.vec3a[2] = 0;
      mat4.translate(this.tmpMat4, this.tmpMat4, this.vec3a);
      mat4.multiply(this.tmpMat4, matrix, this.tmpMat4);
      mat4.multiply(this.tmpMat4, this.vpMatrix, this.tmpMat4);
    } else {
      // apply RTS transformation in world space
      mat4.copy(this.tmpMat4, object.getWorldTransform());
      this.vec3a[0] = tx;
      this.vec3a[1] = ty;
      this.vec3a[2] = 0;
      mat4.translate(this.tmpMat4, this.tmpMat4, this.vec3a);
      mat4.multiply(this.tmpMat4, this.vpMatrix, this.tmpMat4);
    }
    // @see https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API/Tutorial/Transformations
    context.setTransform(this.tmpMat4[0], this.tmpMat4[1], this.tmpMat4[4], this.tmpMat4[5], this.tmpMat4[12], this.tmpMat4[13]);
  };
  _proto.safeMergeAABB = function safeMergeAABB() {
    var merged = new AABB();
    for (var _len = arguments.length, aabbs = new Array(_len), _key = 0; _key < _len; _key++) {
      aabbs[_key] = arguments[_key];
    }
    aabbs.forEach(function (aabb) {
      merged.add(aabb);
    });
    return merged;
  };
  return CanvasRendererPlugin;
}();
CanvasRendererPlugin.tag = 'CanvasRenderer';

var DefaultRenderer = /*#__PURE__*/function () {
  function DefaultRenderer(imagePool) {
    this.imagePool = void 0;
    this.imagePool = imagePool;
  }
  var _proto = DefaultRenderer.prototype;
  _proto.render = function render(context, parsedStyle, object, canvasContext, plugin, runtime) {
    var fill = parsedStyle.fill,
      fillRule = parsedStyle.fillRule,
      opacity = parsedStyle.opacity,
      fillOpacity = parsedStyle.fillOpacity,
      stroke = parsedStyle.stroke,
      strokeOpacity = parsedStyle.strokeOpacity,
      lineWidth = parsedStyle.lineWidth,
      lineCap = parsedStyle.lineCap,
      lineJoin = parsedStyle.lineJoin,
      shadowType = parsedStyle.shadowType,
      shadowColor = parsedStyle.shadowColor,
      shadowBlur = parsedStyle.shadowBlur,
      filter = parsedStyle.filter,
      miterLimit = parsedStyle.miterLimit;
    var hasFill = !isNil(fill) && !fill.isNone;
    var hasStroke = !isNil(stroke) && !stroke.isNone && lineWidth > 0;
    var isFillTransparent = fill.alpha === 0;
    var hasFilter = !!(filter && filter.length);
    var hasShadow = !isNil(shadowColor) && shadowBlur > 0;
    var nodeName = object.nodeName;
    var isInnerShadow = shadowType === 'inner';
    var shouldDrawShadowWithStroke = hasStroke && hasShadow && (nodeName === Shape.PATH || nodeName === Shape.LINE || nodeName === Shape.POLYLINE || isFillTransparent || isInnerShadow);
    if (hasFill) {
      context.globalAlpha = opacity * fillOpacity;
      if (!shouldDrawShadowWithStroke) {
        setShadowAndFilter(object, context, hasShadow);
      }
      this.fill(context, object, fill, fillRule, canvasContext, plugin, runtime);
      if (!shouldDrawShadowWithStroke) {
        this.clearShadowAndFilter(context, hasFilter, hasShadow);
      }
    }
    if (hasStroke) {
      context.globalAlpha = opacity * strokeOpacity;
      context.lineWidth = lineWidth;
      if (!isNil(miterLimit)) {
        context.miterLimit = miterLimit;
      }
      if (!isNil(lineCap)) {
        context.lineCap = lineCap;
      }
      if (!isNil(lineJoin)) {
        context.lineJoin = lineJoin;
      }
      if (shouldDrawShadowWithStroke) {
        if (isInnerShadow) {
          context.globalCompositeOperation = 'source-atop';
        }
        setShadowAndFilter(object, context, true);
        if (isInnerShadow) {
          this.stroke(context, object, stroke, canvasContext, plugin, runtime);
          context.globalCompositeOperation = 'source-over';
          this.clearShadowAndFilter(context, hasFilter, true);
        }
      }
      this.stroke(context, object, stroke, canvasContext, plugin, runtime);
    }
  };
  _proto.clearShadowAndFilter = function clearShadowAndFilter(context, hasFilter, hasShadow) {
    if (hasShadow) {
      context.shadowColor = 'transparent';
      context.shadowBlur = 0;
    }
    if (hasFilter) {
      // save drop-shadow filter
      var oldFilter = context.filter;
      if (!isNil(oldFilter) && oldFilter.indexOf('drop-shadow') > -1) {
        context.filter = oldFilter.replace(/drop-shadow\([^)]*\)/, '').trim() || 'none';
      }
    }
  };
  _proto.fill = function fill(context, object, _fill, fillRule, canvasContext, plugin, runtime) {
    var _this = this;
    if (Array.isArray(_fill)) {
      _fill.forEach(function (gradient) {
        context.fillStyle = _this.getColor(gradient, object, context);
        fillRule ? context.fill(fillRule) : context.fill();
      });
    } else {
      if (isPattern(_fill)) {
        context.fillStyle = this.getPattern(_fill, object, context, canvasContext, plugin, runtime);
      }
      fillRule ? context.fill(fillRule) : context.fill();
    }
  };
  _proto.stroke = function stroke(context, object, _stroke, canvasContext, plugin, runtime) {
    var _this2 = this;
    if (Array.isArray(_stroke)) {
      _stroke.forEach(function (gradient) {
        context.strokeStyle = _this2.getColor(gradient, object, context);
        context.stroke();
      });
    } else {
      if (isPattern(_stroke)) {
        context.strokeStyle = this.getPattern(_stroke, object, context, canvasContext, plugin, runtime);
      }
      context.stroke();
    }
  };
  _proto.getPattern = function getPattern(pattern, object, context, canvasContext, plugin, runtime) {
    var $offscreenCanvas;
    var dpr;
    if (pattern.image.nodeName === 'rect') {
      var _pattern$image$parsed = pattern.image.parsedStyle,
        width = _pattern$image$parsed.width,
        height = _pattern$image$parsed.height;
      dpr = canvasContext.contextService.getDPR();
      var offscreenCanvas = canvasContext.config.offscreenCanvas;
      $offscreenCanvas = runtime.offscreenCanvas.getOrCreateCanvas(offscreenCanvas);
      $offscreenCanvas.width = width * dpr;
      $offscreenCanvas.height = height * dpr;
      var offscreenCanvasContext = runtime.offscreenCanvas.getOrCreateContext(offscreenCanvas);
      var restoreStack = [];
      // offscreenCanvasContext.scale(1 / dpr, 1 / dpr);
      pattern.image.forEach(function (object) {
        plugin.renderDisplayObject(object, offscreenCanvasContext, canvasContext, restoreStack, runtime);
      });
      restoreStack.forEach(function () {
        offscreenCanvasContext.restore();
      });
    }
    var canvasPattern = this.imagePool.getOrCreatePatternSync(pattern, context, $offscreenCanvas, dpr, function () {
      // set dirty rectangle flag
      object.renderable.dirty = true;
      canvasContext.renderingService.dirtify();
    });
    return canvasPattern;
  };
  _proto.getColor = function getColor(parsedColor, object, context) {
    var color;
    if (parsedColor.type === GradientType.LinearGradient || parsedColor.type === GradientType.RadialGradient) {
      var bounds = object.getGeometryBounds();
      var width = bounds && bounds.halfExtents[0] * 2 || 1;
      var height = bounds && bounds.halfExtents[1] * 2 || 1;
      color = this.imagePool.getOrCreateGradient(_extends({
        type: parsedColor.type
      }, parsedColor.value, {
        width: width,
        height: height
      }), context);
    }
    return color;
  };
  return DefaultRenderer;
}();
/**
 * apply before fill and stroke but only once
 */
function setShadowAndFilter(object, context, hasShadow) {
  var _object$parsedStyle = object.parsedStyle,
    filter = _object$parsedStyle.filter,
    shadowColor = _object$parsedStyle.shadowColor,
    shadowBlur = _object$parsedStyle.shadowBlur,
    shadowOffsetX = _object$parsedStyle.shadowOffsetX,
    shadowOffsetY = _object$parsedStyle.shadowOffsetY;
  if (filter && filter.length) {
    // use raw filter string
    context.filter = object.style.filter;
  }
  if (hasShadow) {
    context.shadowColor = shadowColor.toString();
    context.shadowBlur = shadowBlur || 0;
    context.shadowOffsetX = shadowOffsetX || 0;
    context.shadowOffsetY = shadowOffsetY || 0;
  }
}

var ImageRenderer = /*#__PURE__*/function () {
  function ImageRenderer(imagePool) {
    this.imagePool = void 0;
    this.imagePool = imagePool;
  }
  var _proto = ImageRenderer.prototype;
  _proto.render = function render(context, parsedStyle, object) {
    var width = parsedStyle.width,
      height = parsedStyle.height,
      img = parsedStyle.img,
      shadowColor = parsedStyle.shadowColor,
      shadowBlur = parsedStyle.shadowBlur;
    var image;
    var iw = width;
    var ih = height;
    if (isString(img)) {
      // image has been loaded in `mounted` hook
      image = this.imagePool.getImageSync(img);
    } else {
      iw || (iw = img.width);
      ih || (ih = img.height);
      image = img;
    }
    if (image) {
      var hasShadow = !isNil(shadowColor) && shadowBlur > 0;
      setShadowAndFilter(object, context, hasShadow);
      // node-canvas will throw the following err:
      // Error: Image given has not completed loading
      try {
        context.drawImage(image, 0, 0, iw, ih);
      } catch (e) {}
    }
  };
  return ImageRenderer;
}();

var TextRenderer = /*#__PURE__*/function () {
  function TextRenderer() {}
  var _proto = TextRenderer.prototype;
  _proto.render = function render(context, parsedStyle, object) {
    var lineWidth = parsedStyle.lineWidth,
      textAlign = parsedStyle.textAlign,
      textBaseline = parsedStyle.textBaseline,
      lineJoin = parsedStyle.lineJoin,
      miterLimit = parsedStyle.miterLimit,
      letterSpacing = parsedStyle.letterSpacing,
      stroke = parsedStyle.stroke,
      fill = parsedStyle.fill,
      fillOpacity = parsedStyle.fillOpacity,
      strokeOpacity = parsedStyle.strokeOpacity,
      opacity = parsedStyle.opacity,
      metrics = parsedStyle.metrics,
      dx = parsedStyle.dx,
      dy = parsedStyle.dy,
      shadowColor = parsedStyle.shadowColor,
      shadowBlur = parsedStyle.shadowBlur;
    var font = metrics.font,
      lines = metrics.lines,
      height = metrics.height,
      lineHeight = metrics.lineHeight,
      lineMetrics = metrics.lineMetrics;
    context.font = font;
    context.lineWidth = lineWidth;
    context.textAlign = textAlign === 'middle' ? 'center' : textAlign;
    var formattedTextBaseline = textBaseline;
    if (
    // formattedTextBaseline === 'bottom' ||
    !runtime.enableCSSParsing && formattedTextBaseline === 'alphabetic') {
      formattedTextBaseline = 'bottom';
    }
    context.lineJoin = lineJoin;
    if (!isNil(miterLimit)) {
      context.miterLimit = miterLimit;
    }
    var linePositionY = 0;
    // handle vertical text baseline
    if (textBaseline === 'middle') {
      linePositionY = -height / 2 - lineHeight / 2;
    } else if (textBaseline === 'bottom' || textBaseline === 'alphabetic' || textBaseline === 'ideographic') {
      linePositionY = -height;
    } else if (textBaseline === 'top' || textBaseline === 'hanging') {
      linePositionY = -lineHeight;
    }
    // account for dx & dy
    var offsetX = dx || 0;
    linePositionY += dy || 0;
    if (lines.length === 1) {
      if (formattedTextBaseline === 'bottom') {
        formattedTextBaseline = 'middle';
        linePositionY -= 0.5 * height;
      } else if (formattedTextBaseline === 'top') {
        formattedTextBaseline = 'middle';
        linePositionY += 0.5 * height;
      }
    }
    context.textBaseline = formattedTextBaseline;
    var hasShadow = !isNil(shadowColor) && shadowBlur > 0;
    setShadowAndFilter(object, context, hasShadow);
    // draw lines line by line
    for (var i = 0; i < lines.length; i++) {
      var linePositionX = lineWidth / 2 + offsetX;
      linePositionY += lineHeight;
      // no need to re-position X, cause we already set text align
      // @see https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/textAlign
      if (!isNil(stroke) && !stroke.isNone && lineWidth) {
        this.drawLetterSpacing(context, lines[i], lineMetrics[i], textAlign, linePositionX, linePositionY, letterSpacing, fillOpacity, strokeOpacity, opacity, true);
      }
      if (!isNil(fill)) {
        this.drawLetterSpacing(context, lines[i], lineMetrics[i], textAlign, linePositionX, linePositionY, letterSpacing, fillOpacity, strokeOpacity, opacity);
      }
    }
  };
  _proto.drawLetterSpacing = function drawLetterSpacing(context, text, lineMetrics, textAlign, x, y, letterSpacing, fillOpacity, strokeOpacity, opacity, isStroke) {
    if (isStroke === void 0) {
      isStroke = false;
    }
    // letterSpacing of 0 means normal, render all texts directly
    if (letterSpacing === 0) {
      if (isStroke) {
        this.strokeText(context, text, x, y, strokeOpacity);
      } else {
        this.fillText(context, text, x, y, fillOpacity, opacity);
      }
      return;
    }
    // draw text using left align
    var currentTextAlign = context.textAlign;
    context.textAlign = 'left';
    var currentPosition = x;
    if (textAlign === 'center' || textAlign === 'middle') {
      currentPosition = x - lineMetrics.width / 2;
    } else if (textAlign === 'right' || textAlign === 'end') {
      currentPosition = x - lineMetrics.width;
    }
    var stringArray = Array.from(text);
    var previousWidth = context.measureText(text).width;
    var currentWidth = 0;
    for (var i = 0; i < stringArray.length; ++i) {
      var currentChar = stringArray[i];
      if (isStroke) {
        this.strokeText(context, currentChar, currentPosition, y, strokeOpacity);
      } else {
        this.fillText(context, currentChar, currentPosition, y, fillOpacity, opacity);
      }
      currentWidth = context.measureText(text.substring(i + 1)).width;
      currentPosition += previousWidth - currentWidth + letterSpacing;
      previousWidth = currentWidth;
    }
    context.textAlign = currentTextAlign;
  };
  _proto.fillText = function fillText(context, text, x, y, fillOpacity, opacity) {
    var currentGlobalAlpha;
    var applyOpacity = !isNil(fillOpacity) && fillOpacity !== 1;
    if (applyOpacity) {
      currentGlobalAlpha = context.globalAlpha;
      context.globalAlpha = fillOpacity * opacity;
    }
    context.fillText(text, x, y);
    if (applyOpacity) {
      context.globalAlpha = currentGlobalAlpha;
    }
  };
  _proto.strokeText = function strokeText(context, text, x, y, strokeOpacity) {
    var currentGlobalAlpha;
    var applyOpacity = !isNil(strokeOpacity) && strokeOpacity !== 1;
    if (applyOpacity) {
      currentGlobalAlpha = context.globalAlpha;
      context.globalAlpha = strokeOpacity;
    }
    context.strokeText(text, x, y);
    if (applyOpacity) {
      context.globalAlpha = currentGlobalAlpha;
    }
  };
  return TextRenderer;
}();

var RectRenderer = /*#__PURE__*/function (_DefaultRenderer) {
  _inheritsLoose(RectRenderer, _DefaultRenderer);
  function RectRenderer() {
    return _DefaultRenderer.apply(this, arguments) || this;
  }
  return RectRenderer;
}(DefaultRenderer);

var CircleRenderer = /*#__PURE__*/function (_DefaultRenderer) {
  _inheritsLoose(CircleRenderer, _DefaultRenderer);
  function CircleRenderer() {
    return _DefaultRenderer.apply(this, arguments) || this;
  }
  return CircleRenderer;
}(DefaultRenderer);

var EllipseRenderer = /*#__PURE__*/function (_DefaultRenderer) {
  _inheritsLoose(EllipseRenderer, _DefaultRenderer);
  function EllipseRenderer() {
    return _DefaultRenderer.apply(this, arguments) || this;
  }
  return EllipseRenderer;
}(DefaultRenderer);

var LineRenderer = /*#__PURE__*/function (_DefaultRenderer) {
  _inheritsLoose(LineRenderer, _DefaultRenderer);
  function LineRenderer() {
    return _DefaultRenderer.apply(this, arguments) || this;
  }
  return LineRenderer;
}(DefaultRenderer);

var PolylineRenderer = /*#__PURE__*/function (_DefaultRenderer) {
  _inheritsLoose(PolylineRenderer, _DefaultRenderer);
  function PolylineRenderer() {
    return _DefaultRenderer.apply(this, arguments) || this;
  }
  return PolylineRenderer;
}(DefaultRenderer);

var PolygonRenderer = /*#__PURE__*/function (_DefaultRenderer) {
  _inheritsLoose(PolygonRenderer, _DefaultRenderer);
  function PolygonRenderer() {
    return _DefaultRenderer.apply(this, arguments) || this;
  }
  return PolygonRenderer;
}(DefaultRenderer);

var PathRenderer = /*#__PURE__*/function (_DefaultRenderer) {
  _inheritsLoose(PathRenderer, _DefaultRenderer);
  function PathRenderer() {
    return _DefaultRenderer.apply(this, arguments) || this;
  }
  return PathRenderer;
}(DefaultRenderer);

var Plugin = /*#__PURE__*/function (_AbstractRendererPlug) {
  _inheritsLoose(Plugin, _AbstractRendererPlug);
  function Plugin(options) {
    var _this;
    if (options === void 0) {
      options = {};
    }
    _this = _AbstractRendererPlug.call(this) || this;
    _this.options = void 0;
    _this.name = 'canvas-renderer';
    _this.options = options;
    return _this;
  }
  var _proto = Plugin.prototype;
  _proto.init = function init() {
    var _defaultStyleRenderer;
    var canvasRendererPluginOptions = _extends({
      dirtyObjectNumThreshold: 500,
      dirtyObjectRatioThreshold: 0.8
    }, this.options);
    // @ts-ignore
    var imagePool = this.context.imagePool;
    var defaultRenderer = new DefaultRenderer(imagePool);
    var defaultStyleRendererFactory = (_defaultStyleRenderer = {}, _defaultStyleRenderer[Shape.CIRCLE] = defaultRenderer, _defaultStyleRenderer[Shape.ELLIPSE] = defaultRenderer, _defaultStyleRenderer[Shape.RECT] = defaultRenderer, _defaultStyleRenderer[Shape.IMAGE] = new ImageRenderer(imagePool), _defaultStyleRenderer[Shape.TEXT] = new TextRenderer(), _defaultStyleRenderer[Shape.LINE] = defaultRenderer, _defaultStyleRenderer[Shape.POLYLINE] = defaultRenderer, _defaultStyleRenderer[Shape.POLYGON] = defaultRenderer, _defaultStyleRenderer[Shape.PATH] = defaultRenderer, _defaultStyleRenderer[Shape.GROUP] = undefined, _defaultStyleRenderer[Shape.HTML] = undefined, _defaultStyleRenderer[Shape.MESH] = undefined, _defaultStyleRenderer);
    this.context.defaultStyleRendererFactory = defaultStyleRendererFactory;
    this.context.styleRendererFactory = defaultStyleRendererFactory;
    this.addRenderingPlugin(new CanvasRendererPlugin(canvasRendererPluginOptions));
  };
  _proto.destroy = function destroy() {
    this.removeAllRenderingPlugins();
    delete this.context.defaultStyleRendererFactory;
    delete this.context.styleRendererFactory;
  };
  return Plugin;
}(AbstractRendererPlugin);

export { CircleRenderer, EllipseRenderer, ImageRenderer, LineRenderer, PathRenderer, Plugin, PolygonRenderer, PolylineRenderer, RectRenderer, TextRenderer };