Ghostscript Bug 701324. Improved robustness of lcms2mt

lcmsmt will give up if it can't find the perceptual MLUT.
This fix will have it check to see if the colorimetric or
saturation intents are present also.

1 files changed, 11 insertions, 2 deletions

diff --git a/lcms2mt/src/cmsio1.c b/lcms2mt/src/cmsio1.c
index f95a19be1..627f8598e 100644
--- a/lcms2mt/src/cmsio1.c
+++ b/lcms2mt/src/cmsio1.c
@@ -308,6 +308,7 @@ cmsPipeline* CMSEXPORT _cmsReadInputLUT(cmsContext ContextID, cmsHPROFILE hProfi
     cmsTagTypeSignature OriginalType;
     cmsTagSignature tag16;
     cmsTagSignature tagFloat;
+    int k;
 
     // On named color, take the appropriate tag
     if (cmsGetDeviceClass(ContextID, hProfile) == cmsSigNamedColorClass) {
@@ -345,9 +346,17 @@ cmsPipeline* CMSEXPORT _cmsReadInputLUT(cmsContext ContextID, cmsHPROFILE hProfi
             return _cmsReadFloatInputTag(ContextID, hProfile, tagFloat);
         }
 
-        // Revert to perceptual if no tag is found
+        /* There are profiles out there (not legal) that may only have a
+           colorimetric or saturation tag and no perceptual tag.  If we
+           can't find the specified intent be a bit robust and not give
+           up until we can't find any table, starting with perceptual */
         if (!cmsIsTag(ContextID, hProfile, tag16)) {
-            tag16 = Device2PCS16[0];
+            for (k = 0; k < 3; k++) {
+                if (cmsIsTag(ContextID, hProfile, Device2PCS16[k])) {
+                    tag16 = Device2PCS16[k];
+                    break;
+                }
+            }
         }
 
         if (cmsIsTag(ContextID, hProfile, tag16)) { // Is there any LUT-Based table?