Issue 4lex4#164 - Fix TIFF saving when JPEG and posterized

hfiguiere · Jan 6, 2021 · f6ae162 · f6ae162
1 parent 3d1e74e
commit f6ae162
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/src/core/TiffWriter.cpp b/src/core/TiffWriter.cpp
@@ -222,8 +222,10 @@ bool TiffWriter::writeBitonalOrIndexed8Image(const TiffHandle& tif, const QImage
   }
 
   if (image.format() == QImage::Format_Indexed8) {
-    TIFFSetField(tif.handle(), TIFFTAG_COMPRESSION,
-                 uint16(ApplicationSettings::getInstance().getTiffColorCompression()));
+    uint16 compress = (photometric == PHOTOMETRIC_PALETTE) ?
+                      COMPRESSION_LZW :
+                      uint16(ApplicationSettings::getInstance().getTiffColorCompression());
+    TIFFSetField(tif.handle(), TIFFTAG_COMPRESSION, compress);
   } else {
     TIFFSetField(tif.handle(), TIFFTAG_COMPRESSION, uint16(ApplicationSettings::getInstance().getTiffBwCompression()));
   }