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| goog.provide('ol.render.canvas.ReplayGroup');
goog.require('ol');
goog.require('ol.array');
goog.require('ol.dom');
goog.require('ol.extent');
goog.require('ol.geom.flat.transform');
goog.require('ol.obj');
goog.require('ol.render.ReplayGroup');
goog.require('ol.render.canvas.Replay');
goog.require('ol.render.canvas.ImageReplay');
goog.require('ol.render.canvas.LineStringReplay');
goog.require('ol.render.canvas.PolygonReplay');
goog.require('ol.render.canvas.TextReplay');
goog.require('ol.render.replay');
goog.require('ol.transform');
/**
* @constructor
* @extends {ol.render.ReplayGroup}
* @param {number} tolerance Tolerance.
* @param {ol.Extent} maxExtent Max extent.
* @param {number} resolution Resolution.
* @param {boolean} overlaps The replay group can have overlapping geometries.
* @param {number=} opt_renderBuffer Optional rendering buffer.
* @struct
*/
ol.render.canvas.ReplayGroup = function(
tolerance, maxExtent, resolution, overlaps, opt_renderBuffer) {
ol.render.ReplayGroup.call(this);
/**
* @private
* @type {number}
*/
this.tolerance_ = tolerance;
/**
* @private
* @type {ol.Extent}
*/
this.maxExtent_ = maxExtent;
/**
* @private
* @type {boolean}
*/
this.overlaps_ = overlaps;
/**
* @private
* @type {number}
*/
this.resolution_ = resolution;
/**
* @private
* @type {number|undefined}
*/
this.renderBuffer_ = opt_renderBuffer;
/**
* @private
* @type {!Object.<string,
* Object.<ol.render.ReplayType, ol.render.canvas.Replay>>}
*/
this.replaysByZIndex_ = {};
/**
* @private
* @type {CanvasRenderingContext2D}
*/
this.hitDetectionContext_ = ol.dom.createCanvasContext2D(1, 1);
/**
* @private
* @type {ol.Transform}
*/
this.hitDetectionTransform_ = ol.transform.create();
};
ol.inherits(ol.render.canvas.ReplayGroup, ol.render.ReplayGroup);
/**
* This cache is used for storing calculated pixel circles for increasing performance.
* It is a static property to allow each Replaygroup to access it.
* @type {Object.<number, Array.<Array.<(boolean|undefined)>>>}
* @private
*/
ol.render.canvas.ReplayGroup.circleArrayCache_ = {
0: [[true]]
};
/**
* This method fills a row in the array from the given coordinate to the
* middle with `true`.
* @param {Array.<Array.<(boolean|undefined)>>} array The array that will be altered.
* @param {number} x X coordinate.
* @param {number} y Y coordinate.
* @private
*/
ol.render.canvas.ReplayGroup.fillCircleArrayRowToMiddle_ = function(array, x, y) {
var i;
var radius = Math.floor(array.length / 2);
if (x >= radius) {
for (i = radius; i < x; i++) {
array[i][y] = true;
}
} else Eif (x < radius) {
for (i = x + 1; i < radius; i++) {
array[i][y] = true;
}
}
};
/**
* This methods creates a circle inside a fitting array. Points inside the
* circle are marked by true, points on the outside are undefined.
* It uses the midpoint circle algorithm.
* A cache is used to increase performance.
* @param {number} radius Radius.
* @returns {Array.<Array.<(boolean|undefined)>>} An array with marked circle points.
* @private
*/
ol.render.canvas.ReplayGroup.getCircleArray_ = function(radius) {
if (ol.render.canvas.ReplayGroup.circleArrayCache_[radius] !== undefined) {
return ol.render.canvas.ReplayGroup.circleArrayCache_[radius];
}
var arraySize = radius * 2 + 1;
var arr = new Array(arraySize);
for (var i = 0; i < arraySize; i++) {
arr[i] = new Array(arraySize);
}
var x = radius;
var y = 0;
var error = 0;
while (x >= y) {
ol.render.canvas.ReplayGroup.fillCircleArrayRowToMiddle_(arr, radius + x, radius + y);
ol.render.canvas.ReplayGroup.fillCircleArrayRowToMiddle_(arr, radius + y, radius + x);
ol.render.canvas.ReplayGroup.fillCircleArrayRowToMiddle_(arr, radius - y, radius + x);
ol.render.canvas.ReplayGroup.fillCircleArrayRowToMiddle_(arr, radius - x, radius + y);
ol.render.canvas.ReplayGroup.fillCircleArrayRowToMiddle_(arr, radius - x, radius - y);
ol.render.canvas.ReplayGroup.fillCircleArrayRowToMiddle_(arr, radius - y, radius - x);
ol.render.canvas.ReplayGroup.fillCircleArrayRowToMiddle_(arr, radius + y, radius - x);
ol.render.canvas.ReplayGroup.fillCircleArrayRowToMiddle_(arr, radius + x, radius - y);
y++;
error += 1 + 2 * y;
if (2 * (error - x) + 1 > 0) {
x -= 1;
error += 1 - 2 * x;
}
}
ol.render.canvas.ReplayGroup.circleArrayCache_[radius] = arr;
return arr;
};
/**
* @param {Array.<ol.render.ReplayType>} replays Replays.
* @return {boolean} Has replays of the provided types.
*/
ol.render.canvas.ReplayGroup.prototype.hasReplays = function(replays) {
for (var zIndex in this.replaysByZIndex_) {
var candidates = this.replaysByZIndex_[zIndex];
for (var i = 0, ii = replays.length; i < ii; ++i) {
if (replays[i] in candidates) {
return true;
}
}
}
return false;
};
/**
* FIXME empty description for jsdoc
*/
ol.render.canvas.ReplayGroup.prototype.finish = function() {
var zKey;
for (zKey in this.replaysByZIndex_) {
var replays = this.replaysByZIndex_[zKey];
var replayKey;
for (replayKey in replays) {
replays[replayKey].finish();
}
}
};
/**
* @param {ol.Coordinate} coordinate Coordinate.
* @param {number} resolution Resolution.
* @param {number} rotation Rotation.
* @param {number} hitTolerance Hit tolerance in pixels.
* @param {Object.<string, boolean>} skippedFeaturesHash Ids of features
* to skip.
* @param {function((ol.Feature|ol.render.Feature)): T} callback Feature
* callback.
* @return {T|undefined} Callback result.
* @template T
*/
ol.render.canvas.ReplayGroup.prototype.forEachFeatureAtCoordinate = function(
coordinate, resolution, rotation, hitTolerance, skippedFeaturesHash, callback) {
hitTolerance = Math.round(hitTolerance);
var contextSize = hitTolerance * 2 + 1;
var transform = ol.transform.compose(this.hitDetectionTransform_,
hitTolerance + 0.5, hitTolerance + 0.5,
1 / resolution, -1 / resolution,
-rotation,
-coordinate[0], -coordinate[1]);
var context = this.hitDetectionContext_;
if (context.canvas.width !== contextSize || context.canvas.height !== contextSize) {
context.canvas.width = contextSize;
context.canvas.height = contextSize;
} else {
context.clearRect(0, 0, contextSize, contextSize);
}
/**
* @type {ol.Extent}
*/
var hitExtent;
Eif (this.renderBuffer_ !== undefined) {
hitExtent = ol.extent.createEmpty();
ol.extent.extendCoordinate(hitExtent, coordinate);
ol.extent.buffer(hitExtent, resolution * (this.renderBuffer_ + hitTolerance), hitExtent);
}
var mask = ol.render.canvas.ReplayGroup.getCircleArray_(hitTolerance);
return this.replayHitDetection_(context, transform, rotation,
skippedFeaturesHash,
/**
* @param {ol.Feature|ol.render.Feature} feature Feature.
* @return {?} Callback result.
*/
function(feature) {
var imageData = context.getImageData(0, 0, contextSize, contextSize).data;
for (var i = 0; i < contextSize; i++) {
for (var j = 0; j < contextSize; j++) {
if (mask[i][j]) {
if (imageData[(j * contextSize + i) * 4 + 3] > 0) {
var result = callback(feature);
if (result) {
return result;
} else {
context.clearRect(0, 0, contextSize, contextSize);
return undefined;
}
}
}
}
}
}, hitExtent);
};
/**
* @param {ol.Transform} transform Transform.
* @return {Array.<number>} Clip coordinates.
*/
ol.render.canvas.ReplayGroup.prototype.getClipCoords = function(transform) {
var maxExtent = this.maxExtent_;
var minX = maxExtent[0];
var minY = maxExtent[1];
var maxX = maxExtent[2];
var maxY = maxExtent[3];
var flatClipCoords = [minX, minY, minX, maxY, maxX, maxY, maxX, minY];
ol.geom.flat.transform.transform2D(
flatClipCoords, 0, 8, 2, transform, flatClipCoords);
return flatClipCoords;
};
/**
* @inheritDoc
*/
ol.render.canvas.ReplayGroup.prototype.getReplay = function(zIndex, replayType) {
var zIndexKey = zIndex !== undefined ? zIndex.toString() : '0';
var replays = this.replaysByZIndex_[zIndexKey];
if (replays === undefined) {
replays = {};
this.replaysByZIndex_[zIndexKey] = replays;
}
var replay = replays[replayType];
if (replay === undefined) {
var Constructor = ol.render.canvas.ReplayGroup.BATCH_CONSTRUCTORS_[replayType];
replay = new Constructor(this.tolerance_, this.maxExtent_,
this.resolution_, this.overlaps_);
replays[replayType] = replay;
}
return replay;
};
/**
* @inheritDoc
*/
ol.render.canvas.ReplayGroup.prototype.isEmpty = function() {
return ol.obj.isEmpty(this.replaysByZIndex_);
};
/**
* @param {CanvasRenderingContext2D} context Context.
* @param {number} pixelRatio Pixel ratio.
* @param {ol.Transform} transform Transform.
* @param {number} viewRotation View rotation.
* @param {Object.<string, boolean>} skippedFeaturesHash Ids of features
* to skip.
* @param {Array.<ol.render.ReplayType>=} opt_replayTypes Ordered replay types
* to replay. Default is {@link ol.render.replay.ORDER}
*/
ol.render.canvas.ReplayGroup.prototype.replay = function(context, pixelRatio,
transform, viewRotation, skippedFeaturesHash, opt_replayTypes) {
/** @type {Array.<number>} */
var zs = Object.keys(this.replaysByZIndex_).map(Number);
zs.sort(ol.array.numberSafeCompareFunction);
// setup clipping so that the parts of over-simplified geometries are not
// visible outside the current extent when panning
var flatClipCoords = this.getClipCoords(transform);
context.save();
context.beginPath();
context.moveTo(flatClipCoords[0], flatClipCoords[1]);
context.lineTo(flatClipCoords[2], flatClipCoords[3]);
context.lineTo(flatClipCoords[4], flatClipCoords[5]);
context.lineTo(flatClipCoords[6], flatClipCoords[7]);
context.clip();
var replayTypes = opt_replayTypes ? opt_replayTypes : ol.render.replay.ORDER;
var i, ii, j, jj, replays, replay;
for (i = 0, ii = zs.length; i < ii; ++i) {
replays = this.replaysByZIndex_[zs[i].toString()];
for (j = 0, jj = replayTypes.length; j < jj; ++j) {
replay = replays[replayTypes[j]];
if (replay !== undefined) {
replay.replay(context, pixelRatio, transform, viewRotation,
skippedFeaturesHash);
}
}
}
context.restore();
};
/**
* @private
* @param {CanvasRenderingContext2D} context Context.
* @param {ol.Transform} transform Transform.
* @param {number} viewRotation View rotation.
* @param {Object.<string, boolean>} skippedFeaturesHash Ids of features
* to skip.
* @param {function((ol.Feature|ol.render.Feature)): T} featureCallback
* Feature callback.
* @param {ol.Extent=} opt_hitExtent Only check features that intersect this
* extent.
* @return {T|undefined} Callback result.
* @template T
*/
ol.render.canvas.ReplayGroup.prototype.replayHitDetection_ = function(
context, transform, viewRotation, skippedFeaturesHash,
featureCallback, opt_hitExtent) {
/** @type {Array.<number>} */
var zs = Object.keys(this.replaysByZIndex_).map(Number);
zs.sort(function(a, b) {
return b - a;
});
var i, ii, j, replays, replay, result;
for (i = 0, ii = zs.length; i < ii; ++i) {
replays = this.replaysByZIndex_[zs[i].toString()];
for (j = ol.render.replay.ORDER.length - 1; j >= 0; --j) {
replay = replays[ol.render.replay.ORDER[j]];
if (replay !== undefined) {
result = replay.replayHitDetection(context, transform, viewRotation,
skippedFeaturesHash, featureCallback, opt_hitExtent);
if (result) {
return result;
}
}
}
}
return undefined;
};
/**
* @const
* @private
* @type {Object.<ol.render.ReplayType,
* function(new: ol.render.canvas.Replay, number, ol.Extent,
* number, boolean)>}
*/
ol.render.canvas.ReplayGroup.BATCH_CONSTRUCTORS_ = {
'Circle': ol.render.canvas.PolygonReplay,
'Default': ol.render.canvas.Replay,
'Image': ol.render.canvas.ImageReplay,
'LineString': ol.render.canvas.LineStringReplay,
'Polygon': ol.render.canvas.PolygonReplay,
'Text': ol.render.canvas.TextReplay
};
|