--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hostsupport/hostopenvg/src/sfMask.h	Wed Oct 06 17:59:01 2010 +0100
@@ -0,0 +1,85 @@
+/* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and /or associated documentation files
+ * (the "Materials "), to deal in the Materials without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Materials,
+ * and to permit persons to whom the Materials are furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Materials.
+ *
+ * THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE MATERIALS OR
+ * THE USE OR OTHER DEALINGS IN THE MATERIALS.
+ */
+
+#ifndef __SFMASK_H
+#define __SFMASK_H
+
+#include "VG/openvg.h"
+
+#ifndef __RIDEFS_H
+#   include "riDefs.h"
+#endif
+
+#ifndef __RIIMAGE_H
+#   include "riImage.h"
+#endif
+
+// Contains implementations of some mask operations that are needed in both the
+// pixel-pipeline and the blitter.
+
+namespace OpenVGRI {
+
+RI_INLINE IntegerColor intMaskOperation(RIuint32 coverage, const IntegerColor& d, VGMaskOperation maskOperation);
+
+RI_INLINE IntegerColor intMaskOperation(RIuint32 coverage, const IntegerColor& d, VGMaskOperation maskOperation)
+{
+    RIuint32 newCoverage;
+    switch (maskOperation)
+    {
+        case VG_SET_MASK:
+            // \note This should work approximately if coverage < 256 always.
+            // See other cases for proper conversions.
+            return IntegerColor(0, 0, 0, coverage); // nop.
+            break;
+        case VG_UNION_MASK:
+        {
+            RIuint32 oldCoverage = d.a;
+            oldCoverage += (oldCoverage >> 7);
+            RIuint32 im = 256 - coverage;
+            RIuint32 ip = 256 - oldCoverage;
+            newCoverage = 256 - ((im * ip) >> 8);
+            break;
+        }
+        case VG_INTERSECT_MASK:
+        {
+            RIuint32 oldCoverage = d.a;
+            oldCoverage += (oldCoverage >> 7);
+            newCoverage = (coverage * oldCoverage) >> 8;
+            break;
+        }
+        default:
+        {
+            RI_ASSERT(maskOperation == VG_SUBTRACT_MASK);
+            RIuint32 im = 256 - coverage;
+            RIuint32 oldCoverage = d.a;
+            oldCoverage += (oldCoverage >> 7);
+            newCoverage = (oldCoverage * im) >> 8;
+            break;
+        }
+    }
+    return IntegerColor(0, 0, 0, newCoverage - (newCoverage >> 8));
+}
+
+}
+
+#endif
+