1 files changed, 63 insertions, 0 deletions
diff --git a/libs/graphics/animator/SkDisplayRandom.cpp b/libs/graphics/animator/SkDisplayRandom.cpp
new file mode 100644
index 0000000000..53775d30d8
--- /dev/null
+++ b/libs/graphics/animator/SkDisplayRandom.cpp
@@ -0,0 +1,63 @@
+#include "SkDisplayRandom.h"
+#include "SkInterpolator.h"
+
+enum SkDisplayRandom_Properties {
+	SK_PROPERTY(random),
+	SK_PROPERTY(seed)
+};
+
+#if SK_USE_CONDENSED_INFO == 0
+
+const SkMemberInfo SkDisplayRandom::fInfo[] = {
+	SK_MEMBER(blend, Float),
+	SK_MEMBER(max, Float),
+	SK_MEMBER(min, Float),
+	SK_MEMBER_DYNAMIC_PROPERTY(random, Float),
+	SK_MEMBER_PROPERTY(seed, Int)
+};
+
+#endif
+
+DEFINE_GET_MEMBER(SkDisplayRandom);
+
+SkDisplayRandom::SkDisplayRandom() : blend(0), min(0), max(SK_Scalar1) {
+}
+
+#ifdef SK_DUMP_ENABLED
+void SkDisplayRandom::dump(SkAnimateMaker* maker) {
+    dumpBase(maker);
+#ifdef SK_CAN_USE_FLOAT
+    SkDebugf("min=\"%g\" ", SkScalarToFloat(min));
+    SkDebugf("max=\"%g\" ", SkScalarToFloat(max));
+    SkDebugf("blend=\"%g\" ", SkScalarToFloat(blend));    
+#else
+    SkDebugf("min=\"%x\" ", min);
+    SkDebugf("max=\"%x\" ", max);
+    SkDebugf("blend=\"%x\" ", blend);    
+#endif
+    SkDebugf("/>\n");
+}
+#endif
+
+bool SkDisplayRandom::getProperty(int index, SkScriptValue* value) const {
+	switch(index) {
+		case SK_PROPERTY(random): {
+			SkScalar random = fRandom.nextUScalar1();
+			SkScalar relativeT = SkInterpolatorBase::Blend(random, blend);
+			value->fOperand.fScalar = min + SkScalarMul(max - min, relativeT);
+			value->fType = SkType_Float;
+			return true;
+		}
+		default:
+			SkASSERT(0);
+	}
+	return false;
+}
+
+bool SkDisplayRandom::setProperty(int index, SkScriptValue& value) {
+	SkASSERT(index == SK_PROPERTY(seed));
+	SkASSERT(value.fType == SkType_Int);
+	fRandom.setSeed(value.fOperand.fS32);
+	return true;
+}
+