From a7cb2810ce20fc78a58d6c51a0c608699b9f77aa Mon Sep 17 00:00:00 2001
From: Wentao Kuang <wkuang@linz.govt.nz>
Date: Thu, 5 Dec 2024 14:29:51 +1300
Subject: [PATCH] Add resize Kernel into bundled config.

---
 packages/config-loader/src/json/json.config.ts    | 1 +
 packages/config-loader/src/json/parse.tile.set.ts | 5 ++++-
 packages/config/src/config/tile.set.ts            | 2 +-
 packages/tiler/src/raster.ts                      | 2 +-
 4 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/packages/config-loader/src/json/json.config.ts b/packages/config-loader/src/json/json.config.ts
index bd4eb7111..c328583b9 100644
--- a/packages/config-loader/src/json/json.config.ts
+++ b/packages/config-loader/src/json/json.config.ts
@@ -247,6 +247,7 @@ export class ConfigJson {
     if (tileSet.type === TileSetType.Raster) {
       if (ts.outputs) tileSet.outputs = ts.outputs;
       if (ts.background) tileSet.background = ts.background;
+      if (ts.resizeKernel) tileSet.resizeKernel = ts.resizeKernel;
     }
 
     if (ts.format) {
diff --git a/packages/config-loader/src/json/parse.tile.set.ts b/packages/config-loader/src/json/parse.tile.set.ts
index 040c08e99..2a641df6d 100644
--- a/packages/config-loader/src/json/parse.tile.set.ts
+++ b/packages/config-loader/src/json/parse.tile.set.ts
@@ -1,4 +1,4 @@
-import { ConfigTileSetOutputParser, parseRgba, TileSetType } from '@basemaps/config';
+import { ConfigTileSetOutputParser, parseRgba, TileResizeKernel, TileSetType } from '@basemaps/config';
 import { z } from 'zod';
 
 export function validateColor(str: string): boolean {
@@ -57,6 +57,8 @@ const zLayerConfig = z
     },
   );
 
+const TileResizeKernel = z.enum(['nearest', 'mitchell', 'lanczos3', 'lanczos2']);
+
 export const zTileSetConfig = z.object({
   type: z.nativeEnum(TileSetType),
   id: z.string(),
@@ -68,6 +70,7 @@ export const zTileSetConfig = z.object({
   minZoom: zZoom.optional(),
   maxZoom: zZoom.optional(),
   format: z.string().optional(),
+  resizeKernel: z.object({ in: TileResizeKernel, out: TileResizeKernel }).optional(),
   outputs: z.array(ConfigTileSetOutputParser).optional(),
 });
 
diff --git a/packages/config/src/config/tile.set.ts b/packages/config/src/config/tile.set.ts
index 07aa1e505..0642f62f3 100644
--- a/packages/config/src/config/tile.set.ts
+++ b/packages/config/src/config/tile.set.ts
@@ -31,7 +31,7 @@ export interface ConfigLayer extends Partial<Record<EpsgCode, string>> {
   maxZoom?: number;
 }
 
-export type TileResizeKernel = 'nearest' | 'lanczos3' | 'lanczos2';
+export type TileResizeKernel = 'nearest' | 'mitchell' | 'lanczos3' | 'lanczos2';
 
 export interface ConfigTileSetBase extends ConfigBase {
   /** Human friendly display name for the tileset */
diff --git a/packages/tiler/src/raster.ts b/packages/tiler/src/raster.ts
index 7278549b7..4ad658628 100644
--- a/packages/tiler/src/raster.ts
+++ b/packages/tiler/src/raster.ts
@@ -7,7 +7,7 @@ export interface TileMaker {
   compose(ctx: TileMakerContext): Promise<{ buffer: Buffer; metrics: Metrics }>;
 }
 
-export type ResizeKernelType = 'nearest' | 'lanczos3' | 'lanczos2';
+export type ResizeKernelType = 'nearest' | 'mitchell' | 'lanczos3' | 'lanczos2';
 export type TileMakerResizeKernel = { in: ResizeKernelType; out: ResizeKernelType };
 
 export interface TileMakerContext {