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| goog.provide('ol.renderer.canvas.VectorTileLayer');
goog.require('ol');
goog.require('ol.LayerType');
goog.require('ol.TileState');
goog.require('ol.dom');
goog.require('ol.extent');
goog.require('ol.layer.VectorTileRenderType');
goog.require('ol.proj');
goog.require('ol.proj.Units');
goog.require('ol.render.ReplayType');
goog.require('ol.render.canvas');
goog.require('ol.render.canvas.ReplayGroup');
goog.require('ol.render.replay');
goog.require('ol.renderer.Type');
goog.require('ol.renderer.canvas.TileLayer');
goog.require('ol.renderer.vector');
goog.require('ol.transform');
/**
* @constructor
* @extends {ol.renderer.canvas.TileLayer}
* @param {ol.layer.VectorTile} layer VectorTile layer.
* @api
*/
ol.renderer.canvas.VectorTileLayer = function(layer) {
/**
* @type {CanvasRenderingContext2D}
*/
this.context = null;
ol.renderer.canvas.TileLayer.call(this, layer);
/**
* @private
* @type {boolean}
*/
this.dirty_ = false;
/**
* @private
* @type {number}
*/
this.renderedLayerRevision_;
/**
* @private
* @type {ol.Transform}
*/
this.tmpTransform_ = ol.transform.create();
// Use lower resolution for pure vector rendering. Closest resolution otherwise.
this.zDirection =
layer.getRenderMode() == ol.layer.VectorTileRenderType.VECTOR ? 1 : 0;
};
ol.inherits(ol.renderer.canvas.VectorTileLayer, ol.renderer.canvas.TileLayer);
/**
* Determine if this renderer handles the provided layer.
* @param {ol.renderer.Type} type The renderer type.
* @param {ol.layer.Layer} layer The candidate layer.
* @return {boolean} The renderer can render the layer.
*/
ol.renderer.canvas.VectorTileLayer['handles'] = function(type, layer) {
return type === ol.renderer.Type.CANVAS && layer.getType() === ol.LayerType.VECTOR_TILE;
};
/**
* Create a layer renderer.
* @param {ol.renderer.Map} mapRenderer The map renderer.
* @param {ol.layer.Layer} layer The layer to be rendererd.
* @return {ol.renderer.canvas.VectorTileLayer} The layer renderer.
*/
ol.renderer.canvas.VectorTileLayer['create'] = function(mapRenderer, layer) {
return new ol.renderer.canvas.VectorTileLayer(/** @type {ol.layer.VectorTile} */ (layer));
};
/**
* @const
* @type {!Object.<string, Array.<ol.render.ReplayType>>}
*/
ol.renderer.canvas.VectorTileLayer.IMAGE_REPLAYS = {
'image': [ol.render.ReplayType.POLYGON, ol.render.ReplayType.CIRCLE,
ol.render.ReplayType.LINE_STRING, ol.render.ReplayType.IMAGE, ol.render.ReplayType.TEXT],
'hybrid': [ol.render.ReplayType.POLYGON, ol.render.ReplayType.LINE_STRING]
};
/**
* @const
* @type {!Object.<string, Array.<ol.render.ReplayType>>}
*/
ol.renderer.canvas.VectorTileLayer.VECTOR_REPLAYS = {
'image': [ol.render.ReplayType.DEFAULT],
'hybrid': [ol.render.ReplayType.IMAGE, ol.render.ReplayType.TEXT, ol.render.ReplayType.DEFAULT],
'vector': ol.render.replay.ORDER
};
/**
* @inheritDoc
*/
ol.renderer.canvas.VectorTileLayer.prototype.prepareFrame = function(frameState, layerState) {
var layer = this.getLayer();
var layerRevision = layer.getRevision();
if (this.renderedLayerRevision_ != layerRevision) {
this.renderedTiles.length = 0;
var renderMode = layer.getRenderMode();
if (!this.context && renderMode != ol.layer.VectorTileRenderType.VECTOR) {
this.context = ol.dom.createCanvasContext2D();
}
Iif (this.context && renderMode == ol.layer.VectorTileRenderType.VECTOR) {
this.context = null;
}
}
this.renderedLayerRevision_ = layerRevision;
return ol.renderer.canvas.TileLayer.prototype.prepareFrame.apply(this, arguments);
};
/**
* @param {ol.VectorImageTile} tile Tile.
* @param {olx.FrameState} frameState Frame state.
* @private
*/
ol.renderer.canvas.VectorTileLayer.prototype.createReplayGroup_ = function(
tile, frameState) {
var layer = this.getLayer();
var pixelRatio = frameState.pixelRatio;
var projection = frameState.viewState.projection;
var revision = layer.getRevision();
var renderOrder = /** @type {ol.RenderOrderFunction} */
(layer.getRenderOrder()) || null;
var replayState = tile.getReplayState(layer);
if (!replayState.dirty && replayState.renderedRevision == revision &&
replayState.renderedRenderOrder == renderOrder) {
return;
}
var source = /** @type {ol.source.VectorTile} */ (layer.getSource());
var sourceTileGrid = source.getTileGrid();
var tileGrid = source.getTileGridForProjection(projection);
var resolution = tileGrid.getResolution(tile.tileCoord[0]);
var tileExtent = tileGrid.getTileCoordExtent(tile.wrappedTileCoord);
for (var t = 0, tt = tile.tileKeys.length; t < tt; ++t) {
var sourceTile = tile.getTile(tile.tileKeys[t]);
Iif (sourceTile.getState() == ol.TileState.ERROR) {
continue;
}
var sourceTileCoord = sourceTile.tileCoord;
var sourceTileExtent = sourceTileGrid.getTileCoordExtent(sourceTileCoord);
var sharedExtent = ol.extent.getIntersection(tileExtent, sourceTileExtent);
var tileProjection = sourceTile.getProjection();
var reproject = false;
if (!ol.proj.equivalent(projection, tileProjection)) {
reproject = true;
sourceTile.setProjection(projection);
}
replayState.dirty = false;
var replayGroup = new ol.render.canvas.ReplayGroup(0, sharedExtent,
resolution, source.getOverlaps(), layer.getRenderBuffer());
var squaredTolerance = ol.renderer.vector.getSquaredTolerance(
resolution, pixelRatio);
/**
* @param {ol.Feature|ol.render.Feature} feature Feature.
* @this {ol.renderer.canvas.VectorTileLayer}
*/
var renderFeature = function(feature) {
var styles;
var styleFunction = feature.getStyleFunction();
if (styleFunction) {
styles = styleFunction.call(/** @type {ol.Feature} */ (feature), resolution);
} else {
styleFunction = layer.getStyleFunction();
Eif (styleFunction) {
styles = styleFunction(feature, resolution);
}
}
Eif (styles) {
Iif (!Array.isArray(styles)) {
styles = [styles];
}
var dirty = this.renderFeature(feature, squaredTolerance, styles,
replayGroup);
this.dirty_ = this.dirty_ || dirty;
replayState.dirty = replayState.dirty || dirty;
}
};
var features = sourceTile.getFeatures();
Iif (renderOrder && renderOrder !== replayState.renderedRenderOrder) {
features.sort(renderOrder);
}
var feature;
for (var i = 0, ii = features.length; i < ii; ++i) {
feature = features[i];
if (reproject) {
if (tileProjection.getUnits() == ol.proj.Units.TILE_PIXELS) {
// projected tile extent
tileProjection.setWorldExtent(sourceTileExtent);
// tile extent in tile pixel space
tileProjection.setExtent(sourceTile.getExtent());
}
feature.getGeometry().transform(tileProjection, projection);
}
renderFeature.call(this, feature);
}
replayGroup.finish();
sourceTile.setReplayGroup(layer, tile.tileCoord.toString(), replayGroup);
}
replayState.renderedRevision = revision;
replayState.renderedRenderOrder = renderOrder;
};
/**
* @inheritDoc
*/
ol.renderer.canvas.VectorTileLayer.prototype.drawTileImage = function(
tile, frameState, layerState, x, y, w, h, gutter) {
var vectorImageTile = /** @type {ol.VectorImageTile} */ (tile);
this.createReplayGroup_(vectorImageTile, frameState);
if (this.context) {
this.renderTileImage_(vectorImageTile, frameState, layerState);
ol.renderer.canvas.TileLayer.prototype.drawTileImage.apply(this, arguments);
}
};
/**
* @inheritDoc
*/
ol.renderer.canvas.VectorTileLayer.prototype.forEachFeatureAtCoordinate = function(coordinate, frameState, hitTolerance, callback, thisArg) {
var resolution = frameState.viewState.resolution;
var rotation = frameState.viewState.rotation;
hitTolerance = hitTolerance == undefined ? 0 : hitTolerance;
var layer = this.getLayer();
/** @type {Object.<string, boolean>} */
var features = {};
/** @type {Array.<ol.VectorImageTile>} */
var renderedTiles = this.renderedTiles;
var source = /** @type {ol.source.VectorTile} */ (layer.getSource());
var tileGrid = source.getTileGridForProjection(frameState.viewState.projection);
var bufferedExtent, found;
var i, ii, replayGroup;
var tile, tileCoord, tileExtent;
for (i = 0, ii = renderedTiles.length; i < ii; ++i) {
tile = renderedTiles[i];
tileCoord = tile.tileCoord;
tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent);
bufferedExtent = ol.extent.buffer(tileExtent, hitTolerance * resolution, bufferedExtent);
if (!ol.extent.containsCoordinate(bufferedExtent, coordinate)) {
continue;
}
for (var t = 0, tt = tile.tileKeys.length; t < tt; ++t) {
var sourceTile = tile.getTile(tile.tileKeys[t]);
Iif (sourceTile.getState() == ol.TileState.ERROR) {
continue;
}
replayGroup = sourceTile.getReplayGroup(layer, tile.tileCoord.toString());
found = found || replayGroup.forEachFeatureAtCoordinate(
coordinate, resolution, rotation, hitTolerance, {},
/**
* @param {ol.Feature|ol.render.Feature} feature Feature.
* @return {?} Callback result.
*/
function(feature) {
var key = ol.getUid(feature).toString();
if (!(key in features)) {
features[key] = true;
return callback.call(thisArg, feature, layer);
}
});
}
}
return found;
};
/**
* @param {ol.VectorTile} tile Tile.
* @param {olx.FrameState} frameState Frame state.
* @return {ol.Transform} transform Transform.
* @private
*/
ol.renderer.canvas.VectorTileLayer.prototype.getReplayTransform_ = function(tile, frameState) {
var layer = this.getLayer();
var source = /** @type {ol.source.VectorTile} */ (layer.getSource());
var tileGrid = source.getTileGrid();
var tileCoord = tile.tileCoord;
var tileResolution = tileGrid.getResolution(tileCoord[0]);
var viewState = frameState.viewState;
var pixelRatio = frameState.pixelRatio;
var renderResolution = viewState.resolution / pixelRatio;
var tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent);
var center = viewState.center;
var origin = ol.extent.getTopLeft(tileExtent);
var size = frameState.size;
var offsetX = Math.round(pixelRatio * size[0] / 2);
var offsetY = Math.round(pixelRatio * size[1] / 2);
return ol.transform.compose(this.tmpTransform_,
offsetX, offsetY,
tileResolution / renderResolution, tileResolution / renderResolution,
viewState.rotation,
(origin[0] - center[0]) / tileResolution,
(center[1] - origin[1]) / tileResolution);
};
/**
* Handle changes in image style state.
* @param {ol.events.Event} event Image style change event.
* @private
*/
ol.renderer.canvas.VectorTileLayer.prototype.handleStyleImageChange_ = function(event) {
this.renderIfReadyAndVisible();
};
/**
* @inheritDoc
*/
ol.renderer.canvas.VectorTileLayer.prototype.postCompose = function(context, frameState, layerState) {
var layer = this.getLayer();
var source = /** @type {ol.source.VectorTile} */ (layer.getSource());
var renderMode = layer.getRenderMode();
var replays = ol.renderer.canvas.VectorTileLayer.VECTOR_REPLAYS[renderMode];
var pixelRatio = frameState.pixelRatio;
var rotation = frameState.viewState.rotation;
var size = frameState.size;
var offsetX = Math.round(pixelRatio * size[0] / 2);
var offsetY = Math.round(pixelRatio * size[1] / 2);
var tiles = this.renderedTiles;
var tileGrid = source.getTileGridForProjection(frameState.viewState.projection);
var clips = [];
var zs = [];
for (var i = tiles.length - 1; i >= 0; --i) {
var tile = /** @type {ol.VectorImageTile} */ (tiles[i]);
Iif (tile.getState() == ol.TileState.ABORT) {
continue;
}
var tileCoord = tile.tileCoord;
var worldOffset = tileGrid.getTileCoordExtent(tileCoord)[0] -
tileGrid.getTileCoordExtent(tile.wrappedTileCoord)[0];
for (var t = 0, tt = tile.tileKeys.length; t < tt; ++t) {
var sourceTile = tile.getTile(tile.tileKeys[t]);
Iif (sourceTile.getState() == ol.TileState.ERROR) {
continue;
}
var replayGroup = sourceTile.getReplayGroup(layer, tileCoord.toString());
if (renderMode != ol.layer.VectorTileRenderType.VECTOR && !replayGroup.hasReplays(replays)) {
continue;
}
var currentZ = sourceTile.tileCoord[0];
var transform = this.getTransform(frameState, worldOffset);
var currentClip = replayGroup.getClipCoords(transform);
context.save();
context.globalAlpha = layerState.opacity;
ol.render.canvas.rotateAtOffset(context, -rotation, offsetX, offsetY);
// Create a clip mask for regions in this low resolution tile that are
// already filled by a higher resolution tile
for (var j = 0, jj = clips.length; j < jj; ++j) {
var clip = clips[j];
Iif (currentZ < zs[j]) {
context.beginPath();
// counter-clockwise (outer ring) for current tile
context.moveTo(currentClip[0], currentClip[1]);
context.lineTo(currentClip[2], currentClip[3]);
context.lineTo(currentClip[4], currentClip[5]);
context.lineTo(currentClip[6], currentClip[7]);
// clockwise (inner ring) for higher resolution tile
context.moveTo(clip[6], clip[7]);
context.lineTo(clip[4], clip[5]);
context.lineTo(clip[2], clip[3]);
context.lineTo(clip[0], clip[1]);
context.clip();
}
}
replayGroup.replay(context, pixelRatio, transform, rotation, {}, replays);
context.restore();
clips.push(currentClip);
zs.push(currentZ);
}
}
ol.renderer.canvas.TileLayer.prototype.postCompose.apply(this, arguments);
};
/**
* @param {ol.Feature|ol.render.Feature} feature Feature.
* @param {number} squaredTolerance Squared tolerance.
* @param {(ol.style.Style|Array.<ol.style.Style>)} styles The style or array of
* styles.
* @param {ol.render.canvas.ReplayGroup} replayGroup Replay group.
* @return {boolean} `true` if an image is loading.
*/
ol.renderer.canvas.VectorTileLayer.prototype.renderFeature = function(feature, squaredTolerance, styles, replayGroup) {
Iif (!styles) {
return false;
}
var loading = false;
Eif (Array.isArray(styles)) {
for (var i = 0, ii = styles.length; i < ii; ++i) {
loading = ol.renderer.vector.renderFeature(
replayGroup, feature, styles[i], squaredTolerance,
this.handleStyleImageChange_, this) || loading;
}
} else {
loading = ol.renderer.vector.renderFeature(
replayGroup, feature, styles, squaredTolerance,
this.handleStyleImageChange_, this) || loading;
}
return loading;
};
/**
* @param {ol.VectorImageTile} tile Tile.
* @param {olx.FrameState} frameState Frame state.
* @param {ol.LayerState} layerState Layer state.
* @private
*/
ol.renderer.canvas.VectorTileLayer.prototype.renderTileImage_ = function(
tile, frameState, layerState) {
var layer = this.getLayer();
var replayState = tile.getReplayState(layer);
var revision = layer.getRevision();
var replays = ol.renderer.canvas.VectorTileLayer.IMAGE_REPLAYS[layer.getRenderMode()];
if (replays && replayState.renderedTileRevision !== revision) {
replayState.renderedTileRevision = revision;
var tileCoord = tile.wrappedTileCoord;
var z = tileCoord[0];
var pixelRatio = frameState.pixelRatio;
var source = /** @type {ol.source.VectorTile} */ (layer.getSource());
var tileGrid = source.getTileGridForProjection(frameState.viewState.projection);
var resolution = tileGrid.getResolution(z);
var context = tile.getContext(layer);
var size = source.getTilePixelSize(z, pixelRatio, frameState.viewState.projection);
context.canvas.width = size[0];
context.canvas.height = size[1];
var tileExtent = tileGrid.getTileCoordExtent(tileCoord);
for (var i = 0, ii = tile.tileKeys.length; i < ii; ++i) {
var sourceTile = tile.getTile(tile.tileKeys[i]);
Iif (sourceTile.getState() == ol.TileState.ERROR) {
continue;
}
var pixelScale = pixelRatio / resolution;
var transform = ol.transform.reset(this.tmpTransform_);
ol.transform.scale(transform, pixelScale, -pixelScale);
ol.transform.translate(transform, -tileExtent[0], -tileExtent[3]);
var replayGroup = sourceTile.getReplayGroup(layer, tile.tileCoord.toString());
replayGroup.replay(context, pixelRatio, transform, 0, {}, replays, true);
}
}
};
|