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import type SourceCache from './source_cache';
import type StyleLayer from '../style/style_layer';
import type CollisionIndex from '../symbol/collision_index';
import type Transform from '../geo/transform';
import type {RetainedQueryData} from '../symbol/placement';
import type {FilterSpecification} from '../style-spec/types';
import assert from 'assert';
import {mat4} from 'gl-matrix';
/*
* Returns a matrix that can be used to convert from tile coordinates to viewport pixel coordinates.
*/
function getPixelPosMatrix(transform, tileID) {
const t = mat4.identity([]);
mat4.translate(t, t, [1, 1, 0]);
mat4.scale(t, t, [transform.width * 0.5, transform.height * 0.5, 1]);
return mat4.multiply(t, t, transform.calculatePosMatrix(tileID.toUnwrapped()));
}
function queryIncludes3DLayer(layers?: Array<string>, styleLayers: {[_: string]: StyleLayer}, sourceID: string) {
if (layers) {
for (const layerID of layers) {
const layer = styleLayers[layerID];
if (layer && layer.source === sourceID && layer.type === 'fill-extrusion') {
return true;
}
}
} else {
for (const key in styleLayers) {
const layer = styleLayers[key];
if (layer.source === sourceID && layer.type === 'fill-extrusion') {
return true;
}
}
}
return false;
}
export function queryRenderedFeatures(sourceCache: SourceCache,
styleLayers: {[_: string]: StyleLayer},
serializedLayers: {[_: string]: Object},
queryGeometry: Array<Point>,
params: { filter: FilterSpecification, layers: Array<string>, availableImages: Array<string> },
transform: Transform) {
const has3DLayer = queryIncludes3DLayer(params && params.layers, styleLayers, sourceCache.id);
const maxPitchScaleFactor = transform.maxPitchScaleFactor();
const tilesIn = sourceCache.tilesIn(queryGeometry, maxPitchScaleFactor, has3DLayer);
tilesIn.sort(sortTilesIn);
const renderedFeatureLayers = [];
for (const tileIn of tilesIn) {
renderedFeatureLayers.push({
wrappedTileID: tileIn.tileID.wrapped().key,
queryResults: tileIn.tile.queryRenderedFeatures(
styleLayers,
serializedLayers,
sourceCache._state,
tileIn.queryGeometry,
tileIn.cameraQueryGeometry,
tileIn.scale,
params,
transform,
maxPitchScaleFactor,
getPixelPosMatrix(sourceCache.transform, tileIn.tileID))
});
}
const result = mergeRenderedFeatureLayers(renderedFeatureLayers);
// Merge state from SourceCache into the results
for (const layerID in result) {
result[layerID].forEach((featureWrapper) => {
const feature = featureWrapper.feature;
const state = sourceCache.getFeatureState(feature.layer['source-layer'], feature.id);
feature.source = feature.layer.source;
if (feature.layer['source-layer']) {
feature.sourceLayer = feature.layer['source-layer'];
}
feature.state = state;
});
}
return result;
}
export function queryRenderedSymbols(styleLayers: {[_: string]: StyleLayer},
serializedLayers: {[_: string]: StyleLayer},
sourceCaches: {[_: string]: SourceCache},
queryGeometry: Array<Point>,
params: { filter: FilterSpecification, layers: Array<string>, availableImages: Array<string> },
collisionIndex: CollisionIndex,
retainedQueryData: {[_: number]: RetainedQueryData}) {
const result = {};
const renderedSymbols = collisionIndex.queryRenderedSymbols(queryGeometry);
const bucketQueryData = [];
for (const bucketInstanceId of Object.keys(renderedSymbols).map(Number)) {
bucketQueryData.push(retainedQueryData[bucketInstanceId]);
}
bucketQueryData.sort(sortTilesIn);
for (const queryData of bucketQueryData) {
const bucketSymbols = queryData.featureIndex.lookupSymbolFeatures(
renderedSymbols[queryData.bucketInstanceId],
serializedLayers,
queryData.bucketIndex,
queryData.sourceLayerIndex,
params.filter,
params.layers,
params.availableImages,
styleLayers);
for (const layerID in bucketSymbols) {
const resultFeatures = result[layerID] = result[layerID] || [];
const layerSymbols = bucketSymbols[layerID];
layerSymbols.sort((a, b) => {
// Match topDownFeatureComparator from FeatureIndex, but using
// most recent sorting of features from bucket.sortFeatures
const featureSortOrder = queryData.featureSortOrder;
if (featureSortOrder) {
// queryRenderedSymbols documentation says we'll return features in
// "top-to-bottom" rendering order (aka last-to-first).
// Actually there can be multiple symbol instances per feature, so
// we sort each feature based on the first matching symbol instance.
const sortedA = featureSortOrder.indexOf(a.featureIndex);
const sortedB = featureSortOrder.indexOf(b.featureIndex);
assert(sortedA >= 0);
assert(sortedB >= 0);
return sortedB - sortedA;
} else {
// Bucket hasn't been re-sorted based on angle, so use the
// reverse of the order the features appeared in the data.
return b.featureIndex - a.featureIndex;
}
});
for (const symbolFeature of layerSymbols) {
resultFeatures.push(symbolFeature);
}
}
}
// Merge state from SourceCache into the results
for (const layerName in result) {
result[layerName].forEach((featureWrapper) => {
const feature = featureWrapper.feature;
const layer = styleLayers[layerName];
const sourceCache = sourceCaches[layer.source];
const state = sourceCache.getFeatureState(feature.layer['source-layer'], feature.id);
feature.source = feature.layer.source;
if (feature.layer['source-layer']) {
feature.sourceLayer = feature.layer['source-layer'];
}
feature.state = state;
});
}
return result;
}
export function querySourceFeatures(sourceCache: SourceCache, params: any) {
const tiles = sourceCache.getRenderableIds().map((id) => {
return sourceCache.getTileByID(id);
});
const result = [];
const dataTiles = {};
for (let i = 0; i < tiles.length; i++) {
const tile = tiles[i];
const dataID = tile.tileID.canonical.key;
if (!dataTiles[dataID]) {
dataTiles[dataID] = true;
tile.querySourceFeatures(result, params);
}
}
return result;
}
function sortTilesIn(a, b) {
const idA = a.tileID;
const idB = b.tileID;
return (idA.overscaledZ - idB.overscaledZ) || (idA.canonical.y - idB.canonical.y) || (idA.wrap - idB.wrap) || (idA.canonical.x - idB.canonical.x);
}
function mergeRenderedFeatureLayers(tiles) {
// Merge results from all tiles, but if two tiles share the same
// wrapped ID, don't duplicate features between the two tiles
const result = {};
const wrappedIDLayerMap = {};
for (const tile of tiles) {
const queryResults = tile.queryResults;
const wrappedID = tile.wrappedTileID;
const wrappedIDLayers = wrappedIDLayerMap[wrappedID] = wrappedIDLayerMap[wrappedID] || {};
for (const layerID in queryResults) {
const tileFeatures = queryResults[layerID];
const wrappedIDFeatures = wrappedIDLayers[layerID] = wrappedIDLayers[layerID] || {};
const resultFeatures = result[layerID] = result[layerID] || [];
for (const tileFeature of tileFeatures) {
if (!wrappedIDFeatures[tileFeature.featureIndex]) {
wrappedIDFeatures[tileFeature.featureIndex] = true;
resultFeatures.push(tileFeature);
}
}
}
}
return result;
}
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