Added Support For kra & krz (Krita Files) to PNG

src/handlers/index.ts

@@ -72,6 +72,8 @@ import xcursorHandler from "./xcursor.ts";
 import shToElfHandler from "./shToElf.ts";
 import cssHandler from "./css.ts";
 import TypstHandler from "./typst.ts";
+import kraHandler from "./kra.ts";
+import krzHandler from "./krz.ts";
 import BRARCHIVEHandler from "./brarchive.ts";
 import wasiRunnerHandler from "./wasiRunner.ts";
 import clangWasiHandler from "./clang-wasi.ts";
@@ -157,6 +159,8 @@ try { handlers.push(new xcursorHandler()) } catch (_) { };
 try { handlers.push(new shToElfHandler()) } catch (_) { };
 try { handlers.push(new cssHandler()) } catch (_) { };
 try { handlers.push(new TypstHandler()) } catch (_) { };
+try { handlers.push(new kraHandler()) } catch (_) { };
+try { handlers.push(new krzHandler()) } catch (_) { };
 try { handlers.push(new BRARCHIVEHandler()) } catch (_) { };
 try { handlers.push(new wasiRunnerHandler()) } catch (_) { };
 try { handlers.push(new clangWasiHandler()) } catch (_) { };

src/handlers/kra.ts

@@ -0,0 +1,66 @@
+import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
+import CommonFormats from "src/CommonFormats.ts";
+import JSZip from "jszip";
+
+class kraHandler implements FormatHandler {
+  public name: string = "kra";
+  public supportedFormats?: FileFormat[];
+  public ready: boolean = false;
+
+  async init() {
+    this.supportedFormats = [
+      CommonFormats.PNG.builder("png").allowFrom(false).allowTo(true),
+
+      {
+        name: "Krita Raster Archive (KRA)",
+        format: "kra",
+        extension: "kra",
+        mime: "application/x-krita",
+        from: true,
+        to: false,
+        internal: "kra",
+        category: ["archive"],
+        lossless: false,
+      },
+    ];
+    this.ready = true;
+  }
+
+  async doConvert(
+    inputFiles: FileData[],
+    inputFormat: FileFormat,
+    outputFormat: FileFormat,
+  ): Promise<FileData[]> {
+    const outputFiles: FileData[] = [];
+    if (inputFormat.format == "kra" && outputFormat.format == "png") {
+      for (const inputFile of inputFiles) {
+        const zip = new JSZip();
+        const zipContent = await zip.loadAsync(inputFile.bytes);
+        let imageFile;
+
+        try {
+          imageFile = zipContent.file("mergedimage.png");
+
+          if (!imageFile) {
+            throw new Error();
+          }
+        } catch {
+          imageFile = zipContent.file("preview.png");
+
+          if (!imageFile) {
+            throw new Error("Could not find image in KRA file");
+          }
+        }
+        const imageData = await imageFile.async("uint8array");
+        outputFiles.push({
+          name: inputFile.name.replace(/\.kra$/, ".png"),
+          bytes: imageData,
+        });
+      }
+    }
+
+    return outputFiles;
+  }
+}
+
+export default kraHandler;

src/handlers/krz.ts

@@ -0,0 +1,57 @@
+import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
+import CommonFormats from "src/CommonFormats.ts";
+import JSZip from "jszip";
+
+class krzHandler implements FormatHandler {
+  public name: string = "krz";
+  public supportedFormats?: FileFormat[];
+  public ready: boolean = false;
+
+  async init() {
+    this.supportedFormats = [
+      CommonFormats.PNG.builder("png").allowFrom(false).allowTo(true),
+
+      {
+        name: "Krita Raster Archive (krz)",
+        format: "krz",
+        extension: "krz",
+        mime: "application/x-krita",
+        from: true,
+        to: false,
+        internal: "krz",
+        category: ["archive"],
+        lossless: false,
+      },
+    ];
+    this.ready = true;
+  }
+
+  async doConvert(
+    inputFiles: FileData[],
+    inputFormat: FileFormat,
+    outputFormat: FileFormat,
+  ): Promise<FileData[]> {
+    const outputFiles: FileData[] = [];
+    if (inputFormat.format == "krz" && outputFormat.format == "png") {
+      for (const inputFile of inputFiles) {
+        const zip = new JSZip();
+        const zipContent = await zip.loadAsync(inputFile.bytes);
+        const imageFile = zipContent.file("preview.png");
+
+        if (!imageFile) {
+          throw new Error("Could not find image in krz file");
+        }
+
+        const imageData = await imageFile.async("uint8array");
+        outputFiles.push({
+          name: inputFile.name.replace(/\.krz$/, ".png"),
+          bytes: imageData,
+        });
+      }
+    }
+
+    return outputFiles;
+  }
+}
+
+export default krzHandler;