fix(stream): return raw content for uncompressed streams in decompressed_content()

When a stream has no /Filter entry, decompressed_content() would fail
because filters() propagates the dictionary lookup error. Unfiltered
streams are already uncompressed, so the correct behavior is to return
the raw content as-is.

This fixes text extraction from Form XObjects generated by pdfrw and
similar tools that use uncompressed streams (no /Filter, just raw
content like "/FullPage Do").

Author: abimaelmartell

src/object.rs

@@ -678,7 +678,11 @@ impl Stream {
 
     pub fn decompressed_content(&self) -> Result<Vec<u8>> {
         let params = self.dict.get(b"DecodeParms").and_then(Object::as_dict).ok();
-        let filters = self.filters()?;
+        let filters = match self.filters() {
+            Ok(f) => f,
+            // No /Filter key means the stream is uncompressed
+            Err(_) => return Ok(self.content.clone()),
+        };
 
         let mut input = self.content.as_slice();
         let mut output = vec![];
@@ -889,4 +893,19 @@ mod test {
         let result = Stream::decompress_zlib(&compressed, None).unwrap();
         assert_eq!(result, original);
     }
+
+    #[test]
+    fn test_uncompressed_stream_returns_raw_content() {
+        use crate::Dictionary;
+
+        // A stream with no /Filter should return its raw content from decompressed_content()
+        let content = b"/FullPage Do
+".to_vec();
+        let mut dict = Dictionary::new();
+        dict.set("Length", content.len() as i64);
+        let stream = Stream::new(dict, content.clone());
+
+        let result = stream.decompressed_content().expect("should succeed for uncompressed stream");
+        assert_eq!(result, content);
+    }
 }