1 files changed, 32 insertions, 0 deletions
diff --git a/source/blender/imbuf/intern/dds/PixelFormat.h b/source/blender/imbuf/intern/dds/PixelFormat.h
index 2602681d979..35c6eacb972 100644
--- a/source/blender/imbuf/intern/dds/PixelFormat.h
+++ b/source/blender/imbuf/intern/dds/PixelFormat.h
@@ -107,6 +107,38 @@
 			}
 		}
 
+        inline float quantizeCeil(float f, int inbits, int outbits)
+        {
+            //uint i = f * (float(1 << inbits) - 1);
+            //i = convert(i, inbits, outbits);
+            //float result = float(i) / (float(1 << outbits) - 1);
+            //nvCheck(result >= f);
+            float result;
+            int offset = 0;
+            do {
+                uint i = offset + uint(f * (float(1 << inbits) - 1));
+                i = convert(i, inbits, outbits);
+                result = float(i) / (float(1 << outbits) - 1);
+                offset++;
+            } while (result < f);
+
+            return result;
+        }
+
+        /*
+        inline float quantizeRound(float f, int bits)
+        {
+            float scale = float(1 << bits);
+            return fround(f * scale) / scale;
+        }
+
+        inline float quantizeFloor(float f, int bits)
+        {
+            float scale = float(1 << bits);
+            return floor(f * scale) / scale;
+        }
+        */
+
 	} // PixelFormat namespace
 
 #endif // _DDS_IMAGE_PIXELFORMAT_H