From de4bbac55eac877fb00052de73d714274b4fd37d Mon Sep 17 00:00:00 2001
From: DRC <information@libjpeg-turbo.org>
Date: Fri, 23 Aug 2024 12:48:01 -0400
Subject: [PATCH] TJCompressor.compress(): Fix lossls buf size calc

---
 ChangeLog.md                                      | 5 +++++
 java/org/libjpegturbo/turbojpeg/TJCompressor.java | 2 ++
 2 files changed, 7 insertions(+)

diff --git a/ChangeLog.md b/ChangeLog.md
index 6962f5f7..17558ff7 100644
--- a/ChangeLog.md
+++ b/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
 =====
diff --git a/java/org/libjpegturbo/turbojpeg/TJCompressor.java b/java/org/libjpegturbo/turbojpeg/TJCompressor.java
index b18cb07d..dff38bf7 100644
--- a/java/org/libjpegturbo/turbojpeg/TJCompressor.java
+++ b/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);