Fix CMYK range on fast float plugin

Range should be in %

1 files changed, 20 insertions, 0 deletions

diff --git a/plugins/fast_float/src/fast_float_tethra.c b/plugins/fast_float/src/fast_float_tethra.c
index 72c872b..ef4fccf 100644
--- a/plugins/fast_float/src/fast_float_tethra.c
+++ b/plugins/fast_float/src/fast_float_tethra.c
@@ -273,9 +273,29 @@ cmsBool OptimizeCLUTRGBTransform(_cmsTransform2Fn* TransformFn,
     // Add the CLUT to the destination LUT
     cmsPipelineInsertStage(OptimizedLUT, cmsAT_BEGIN, OptimizedCLUTmpe);
 
+    // If output is CMYK, add a conversion stage to get %   
+    if (T_COLORSPACE(*OutputFormat) == PT_CMYK) {
+
+        static const cmsFloat64Number mat[] = { 100.0,   0,     0,     0,
+                                                  0,   100.0,   0,     0,
+                                                  0,     0,   100.0,   0,
+                                                  0,     0,     0,   100.0 };
+
+        cmsStage* percent = cmsStageAllocMatrix(ContextID, 4, 4, mat, NULL);
+        if (percent == NULL) goto Error;
+
+        cmsPipelineInsertStage(OriginalLut, cmsAT_END, percent);
+    }
+
     // Resample the LUT
     if (!cmsStageSampleCLutFloat(OptimizedCLUTmpe, XFormSampler, (void*)OriginalLut, 0)) goto Error;
 
+    
+    if (T_COLORSPACE(*OutputFormat) == PT_CMYK) {
+
+        cmsPipelineUnlinkStage(OriginalLut, cmsAT_END, NULL);
+    }
+
     // Set the evaluator, copy parameters   
     data = (_cmsStageCLutData*) cmsStageData(OptimizedCLUTmpe);