shithub: jbig2

Info  •  Files  •  Log  •  Branches

Skip generic regions using TPGDON and issue a warning.

We don't yet implement this, and discarding the data is better than
proceeding with the incorrect decoding proceedures, which generally
just produce noise. Ghostscript bug 690791.

--- a/jbig2_generic.c

+++ b/jbig2_generic.c

@@ -494,6 +494,11 @@

 {

   const int8_t *gbat = params->gbat;

+  if (!params->MMR && params->TPGDON) {

+    return jbig2_error(ctx, JBIG2_SEVERITY_WARNING, segment->number,

+	"NYI: typical prediction in a generic region\n");

+  }

+

   if (!params->MMR && params->GBTEMPLATE == 0) {

     if (gbat[0] == +3 && gbat[1] == -1 &&

         gbat[2] == -3 && gbat[3] == -1 &&