Windows: add bundled libs to PATH when launching sketch

Author: pepc84

mode/CppMode.jar

@@ -666,15 +666,16 @@ private void checkWindowsDLLs(RunnerListener listener, File binary) throws Excep
     for (String dll : allDlls) {
       File src2 = new File(bundledDir, dll);
       if (!src2.exists()) continue;
-      // Copy to binary dir (next to the exe)
+      // Copy next to binary
       File dest = new File(binaryDir, dll);
       try { java.nio.file.Files.copy(src2.toPath(), dest.toPath(),
           java.nio.file.StandardCopyOption.REPLACE_EXISTING);
       } catch (Exception e) {
         System.err.println("[CppMode] Failed to copy " + dll + ": " + e.getMessage());
       }
-      // Also copy to sketch folder so the sketch can find them when run
-      File sketchDest = new File(binary.getParentFile().getParentFile(), dll);
+      // Copy to sketch folder -- CppRunner sets sketch folder as cwd
+      // so Windows finds DLLs there at runtime
+      File sketchDest = new File(sketch.getFolder(), dll);
       try { java.nio.file.Files.copy(src2.toPath(), sketchDest.toPath(),
           java.nio.file.StandardCopyOption.REPLACE_EXISTING);
       } catch (Exception ignored) {}

src/java/CppBuild.java

@@ -25,6 +25,15 @@ public void launch() {
         pb.directory(sketchFolder);
         pb.redirectErrorStream(false);
         // Pass sketch folder so loadImage/loadStrings find data/ assets
+        // On Windows, add bundled DLL directory to PATH so the exe finds them at runtime
+        String osName = System.getProperty("os.name", "").toLowerCase();
+        if (osName.contains("win") && runtimeDir != null) {
+          File bundledLibs = new File(runtimeDir.getParentFile(), "libs/windows-x64");
+          if (bundledLibs.exists()) {
+            String existingPath = pb.environment().getOrDefault("PATH", "");
+            pb.environment().put("PATH", bundledLibs.getAbsolutePath() + ";" + existingPath);
+          }
+        }
         pb.environment().put("PROCESSING_SKETCH_NAME", sketchFolder.getName());
         pb.environment().put("PROCESSING_SKETCH_PATH",
             sketchFolder.getAbsolutePath().replace('\\', '/'));