Add a icon rendering API

src/routes/berrydash/render-icon/get.ts

@@ -0,0 +1,99 @@
+import { Context } from 'elysia'
+import axios from 'axios'
+import sharp from 'sharp'
+
+const parseIntParam = (value: string): number | null => {
+  const parsed = Number(value)
+  if (isNaN(parsed)) return null
+  return parsed
+}
+
+const clamp = (n: number): number => Math.max(0, Math.min(255, n))
+
+const recolor = async (imgBuffer: Buffer, color: number[]): Promise<Buffer> => {
+  const [r, g, b] = color
+
+  const image = sharp(imgBuffer)
+
+  const raw = await image
+    .ensureAlpha()
+    .raw()
+    .toBuffer({ resolveWithObject: true })
+
+  const pixels = raw.data
+  const { width: w, height: h } = raw.info
+
+  for (let i = 0; i < pixels.length; i += 4) {
+    pixels[i] = Math.round((pixels[i] / 255) * r)
+    pixels[i + 1] = Math.round((pixels[i + 1] / 255) * g)
+    pixels[i + 2] = Math.round((pixels[i + 2] / 255) * b)
+  }
+
+  return sharp(pixels, {
+    raw: { width: w, height: h!, channels: 4 }
+  })
+    .png()
+    .toBuffer()
+}
+
+export const handler = async (context: Context) => {
+  let icon = Math.max(-4, Math.min(8, parseIntParam(context.query.icon) ?? 1))
+  let overlay = Math.max(
+    0,
+    Math.min(14, parseIntParam(context.query.overlay) ?? 0)
+  )
+  const birdColor = [
+    clamp(parseIntParam(context.query.birdR) ?? 255),
+    clamp(parseIntParam(context.query.birdG) ?? 255),
+    clamp(parseIntParam(context.query.birdB) ?? 255)
+  ]
+  const overlayColor = [
+    clamp(parseIntParam(context.query.overlayR) ?? 255),
+    clamp(parseIntParam(context.query.overlayG) ?? 255),
+    clamp(parseIntParam(context.query.overlayB) ?? 255)
+  ]
+
+  let overlayImg: Buffer | null = null
+  let iconImg: Buffer | null = null
+  if (overlay !== 0) {
+    try {
+      const result = await axios.get(
+        `https://games-r2.lncvrt.xyz/game-assets/berrydash/overlays/overlay_${overlay}.png`,
+        { responseType: 'arraybuffer' }
+      )
+      overlayImg = Buffer.from(result.data)
+    } catch {}
+  }
+  try {
+    const result = await axios.get(
+      `https://games-r2.lncvrt.xyz/game-assets/berrydash/icons/bird_${icon}.png`,
+      { responseType: 'arraybuffer' }
+    )
+    iconImg = Buffer.from(result.data)
+  } catch {}
+  if (!iconImg) {
+    return new Response(null, { status: 400 })
+  }
+
+  let result = await recolor(iconImg, birdColor)
+
+  if (overlayImg) {
+    const recoloredOverlay = await recolor(overlayImg, overlayColor)
+
+    result = await sharp(result)
+      .composite([
+        {
+          input: recoloredOverlay,
+          top: overlay == 8 ? 25 : 13,
+          left: overlay == 8 ? 10 : 15,
+          blend: 'over'
+        }
+      ])
+      .png()
+      .toBuffer()
+  }
+
+  return new Response(result.buffer as ArrayBuffer, {
+    headers: { 'Content-Type': 'image/png' }
+  })
+}