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fix(CogSource): add zoom property and check in extentInsideLimit #2727

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fix(CogSource): add zoom property and check in extentInsideLimit #2727

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15 changes: 13 additions & 2 deletions packages/Main/src/Source/CogSource.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,13 @@ type CogSourceConfig = {
* An optional decoder pool to use when extracting data from a COG image.
*/
pool?: GeoTIFF.Pool;
/**
* Zoom level bounds for this source. Limits which tile zoom levels will
* request data from this COG. Required when used as an ElevationLayer
* source, since the tile system reads `source.zoom.max` to determine
* maximum subdivision depth.
*/
zoom?: { min: number, max: number };
[key: string]: any; // eslint-disable-line @typescript-eslint/no-explicit-any
}

Expand Down Expand Up @@ -61,6 +68,7 @@ class CogSource extends Source {
defaultAlpha: number;
resampleMethod: string;
pool: GeoTIFF.Pool;
zoom: { min: number, max: number };

/**
* @param config - Source configuration.
Expand All @@ -70,6 +78,7 @@ class CogSource extends Source {
pool = new GeoTIFF.Pool(),
defaultAlpha = 255,
resampleMethod = 'nearest',
zoom = { min: 0, max: Infinity },
...sourceConfig
} = config;

Expand All @@ -83,6 +92,7 @@ class CogSource extends Source {
this.defaultAlpha = defaultAlpha;
this.pool = pool;
this.resampleMethod = resampleMethod;
this.zoom = zoom;

this.overviews = [];

Expand Down Expand Up @@ -126,8 +136,9 @@ class CogSource extends Source {
});
}

extentInsideLimit(extent: Extent) {
return this.extent.intersectsExtent(extent);
extentInsideLimit(extent: Extent, zoom: number) {
return zoom >= this.zoom.min && zoom <= this.zoom.max
&& this.extent.intersectsExtent(extent);
}

urlFromExtent() {
Expand Down
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