TJCompressor.compress(): Fix lossls buf size calc

ChangeLog.md

@@ -28,6 +28,11 @@ unless the `-precision` option was specified before the `-lossless` option.
 calling applications to generate 12-bit-per-sample arithmetic-coded lossy JPEG
 images using the TurboJPEG API.
 
+5. Fixed an error ("Destination buffer is not large enough") that occurred when
+attempting to generate a full-color lossless JPEG image using the TurboJPEG
+Java API's `byte[] TJCompressor.compress()` method if the value of
+`TJ.PARAM_SUBSAMP` was not `TJ.SAMP_444`.
+
 
 3.0.3
 =====

java/org/libjpegturbo/turbojpeg/TJCompressor.java

@@ -485,6 +485,8 @@ public class TJCompressor implements Closeable {
     } else {
       checkSubsampling();
       int subsamp = get(TJ.PARAM_SUBSAMP);
+      if (get(TJ.PARAM_LOSSLESS) == 1 && subsamp != TJ.SAMP_GRAY)
+        subsamp = TJ.SAMP_444;
       buf = new byte[TJ.bufSize(srcWidth, srcHeight, subsamp)];
     }
     compress(buf);