From 0e94fe354fc4a125e90bb193ae40af6b81bfc140 Mon Sep 17 00:00:00 2001
From: radhakrishnan <gingeekrishna@gmail.com>
Date: Tue, 22 Jul 2025 20:21:06 +0530
Subject: [PATCH] Fix EMF to PNG conversion issue #362

- Add EMF-specific handling in ImageMagick converter to avoid LibreOffice delegate issues
- Disable EMF delegate and set proper conversion parameters (density: 300, background: white, alpha: remove)
- Prioritize Inkscape over ImageMagick for EMF files as it handles them natively
- Resolves LibreOffice delegate command failures when converting EMF files

Fixes #362
---
 src/converters/imagemagick.ts | 7 +++++++
 src/converters/main.ts        | 9 +++++----
 2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/src/converters/imagemagick.ts b/src/converters/imagemagick.ts
index 4122a24..e3959f8 100644
--- a/src/converters/imagemagick.ts
+++ b/src/converters/imagemagick.ts
@@ -460,6 +460,13 @@ export function convert(
     }
   }
 
+  // Handle EMF files specifically to avoid LibreOffice delegate issues
+  if (fileType === "emf") {
+    // Use direct conversion without delegates for EMF files
+    inputArgs = ["-define", "emf:delegate=false", "-density", "300"];
+    outputArgs = ["-background", "white", "-alpha", "remove"];
+  }
+
   return new Promise((resolve, reject) => {
     execFile(
       "magick",
diff --git a/src/converters/main.ts b/src/converters/main.ts
index a9f2e42..1726f44 100644
--- a/src/converters/main.ts
+++ b/src/converters/main.ts
@@ -47,6 +47,11 @@ const properties: Record<
     ) => unknown;
   }
 > = {
+  // Prioritize Inkscape for EMF files as it handles them better than ImageMagick
+  inkscape: {
+    properties: propertiesInkscape,
+    converter: convertInkscape,
+  },
   libjxl: {
     properties: propertiesLibjxl,
     converter: convertLibjxl,
@@ -87,10 +92,6 @@ const properties: Record<
     properties: propertiesGraphicsmagick,
     converter: convertGraphicsmagick,
   },
-  inkscape: {
-    properties: propertiesInkscape,
-    converter: convertInkscape,
-  },
   assimp: {
     properties: propertiesassimp,
     converter: convertassimp,