use pdf L_FLATE_ENCODE only for png input; fixes #1961

tesseract-ocr · Oct 7, 2018 · f794571 · f794571
1 parent 5cf5c80
commit f794571
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/api/pdfrenderer.cpp b/src/api/pdfrenderer.cpp
@@ -716,7 +716,8 @@ bool TessPDFRenderer::imageToPDFObj(Pix *pix,
   const int kJpegQuality = jpg_quality;
 
   int format, sad;
-  sad = pixGenerateCIData(pix, L_FLATE_ENCODE, 0, 0, &cid);
+  if (pixGetInputFormat(pix) == IFF_PNG)
+    sad = pixGenerateCIData(pix, L_FLATE_ENCODE, 0, 0, &cid);
   if (!cid) {
     sad = l_generateCIDataForPdf(filename, pix, kJpegQuality, &cid);
   }