fix png compression

README.md

@@ -22,12 +22,13 @@ Scrollsmith is a Node.js tool for generating Dungeons & Dragons one-page dungeon
 
 - Node.js 22+
 - Ollama server running and accessible
-- Nextcloud (optional) for PDF uploads
+- Gitea Releases (optional) for PDF uploads
 - `.env` file with:
 
 ```env
 OLLAMA_API_URL=http://localhost:3000/api/chat/completions
 OLLAMA_API_KEY=your_api_key_here
+COMFYUI_URL=http://192.168.1.124:8188
 ````
 
 ---

compressPng.js

@@ -1,27 +0,0 @@
-import fs from 'fs/promises';
-import UPNG from 'upng-js';
-
-const countUniqueColors = (data) => {
-  const uniqueColors = new Set();
-  for (let i = 0; i < data.length; i += 4) {
-    uniqueColors.add(`${data[i]},${data[i + 1]},${data[i + 2]},${data[i + 3]}`);
-    if (uniqueColors.size > 256) {
-      return uniqueColors.size;
-    }
-  }
-  return uniqueColors.size;
-};
-
-export async function compressPng (filePath) {
-  const buffer = await fs.readFile(filePath);
-  const arrayBuffer = buffer.buffer.slice(buffer.byteOffset, buffer.byteOffset + buffer.byteLength);
-  const img = UPNG.decode(arrayBuffer);
-  const rgba = new Uint8Array(img.data);
-  const frameData = new Uint8Array(img.width * img.height * 4);
-  frameData.set(rgba.subarray(0, frameData.length));
-  const cnum = countUniqueColors(rgba) <= 256 ? 256 : 0;
-  const optimizedArrayBuffer = UPNG.encode([frameData.buffer], img.width, img.height, cnum, img.depth);
-  const optimizedBuffer = Buffer.from(optimizedArrayBuffer);
-  await fs.writeFile(filePath, optimizedBuffer);
-  return filePath;
-};

imageGenerator.js

@@ -2,7 +2,6 @@ import path from "path";
 import { mkdir, writeFile } from "fs/promises";
 import { fileURLToPath } from "url";
 import { callOllama } from "./ollamaClient.js";
-import { compressPng } from "./compressPng.js";
 
 const __dirname = path.dirname(fileURLToPath(import.meta.url));
 const COMFYUI_URL = process.env.COMFYUI_URL || "http://localhost:8188";
@@ -182,9 +181,6 @@ async function generateImageViaComfyUI(prompt, filename) {
 
     console.log("Downloading image...");
     const filepath = await downloadImage(comfyFilename, filename);
-
-    console.log("Compressing PNG...");
-    await compressPng(filepath);
     return filepath;
 
   } catch (err) {