1 files changed, 80 insertions, 0 deletions
diff --git a/src/animator/SkDisplayRandom.cpp b/src/animator/SkDisplayRandom.cpp
new file mode 100644
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--- /dev/null
+++ b/src/animator/SkDisplayRandom.cpp
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+/* libs/graphics/animator/SkDisplayRandom.cpp
+**
+** Copyright 2006, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License"); 
+** you may not use this file except in compliance with the License. 
+** You may obtain a copy of the License at 
+**
+**     http://www.apache.org/licenses/LICENSE-2.0 
+**
+** Unless required by applicable law or agreed to in writing, software 
+** distributed under the License is distributed on an "AS IS" BASIS, 
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
+** See the License for the specific language governing permissions and 
+** limitations under the License.
+*/
+
+#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 = SkUnitCubicInterp(random, SK_Scalar1 - blend, 0, 0, SK_Scalar1 - 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;
+}
+