1 files changed, 49 insertions, 0 deletions
diff --git a/skia/include/SkUnitMappers.h b/skia/include/SkUnitMappers.h
new file mode 100644
index 0000000..a1331bb
--- /dev/null
+++ b/skia/include/SkUnitMappers.h
@@ -0,0 +1,49 @@
+#ifndef SkUnitMappers_DEFINED
+#define SkUnitMappers_DEFINED
+
+#include "SkUnitMapper.h"
+
+/** This discretizes the range [0...1) into N discret values.
+*/
+class SkDiscreteMapper : public SkUnitMapper {
+public:
+    SkDiscreteMapper(int segments);
+    // override from SkUnitMapper
+    virtual uint16_t mapUnit16(uint16_t x);
+
+protected:
+    SkDiscreteMapper(SkFlattenableReadBuffer& );
+    // overrides from SkFlattenable
+    virtual void flatten(SkFlattenableWriteBuffer& );
+    virtual Factory getFactory();
+private:
+    int     fSegments;
+    SkFract fScale;    // computed from fSegments
+
+    static SkFlattenable* Create(SkFlattenableReadBuffer& buffer);
+    
+    typedef SkUnitMapper INHERITED;
+};
+
+/** This returns cos(x), to simulate lighting a sphere, where 0 maps to the
+    center of the sphere, and 1 maps to the edge.
+*/
+class SkCosineMapper : public SkUnitMapper {
+public:
+    SkCosineMapper() {}
+    // override from SkUnitMapper
+    virtual uint16_t mapUnit16(uint16_t x);
+
+protected:
+    SkCosineMapper(SkFlattenableReadBuffer&);
+    // overrides from SkFlattenable
+    virtual Factory getFactory();
+
+private:
+    static SkFlattenable* Create(SkFlattenableReadBuffer&);
+
+    typedef SkUnitMapper INHERITED;
+};
+
+#endif
+