1
2 /*
3 * Copyright 2006 The Android Open Source Project
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9
10 #include "SkDisplayRandom.h"
11 #include "SkInterpolator.h"
12
13 enum SkDisplayRandom_Properties {
14 SK_PROPERTY(random),
15 SK_PROPERTY(seed)
16 };
17
18 #if SK_USE_CONDENSED_INFO == 0
19
20 const SkMemberInfo SkDisplayRandom::fInfo[] = {
21 SK_MEMBER(blend, Float),
22 SK_MEMBER(max, Float),
23 SK_MEMBER(min, Float),
24 SK_MEMBER_DYNAMIC_PROPERTY(random, Float),
25 SK_MEMBER_PROPERTY(seed, Int)
26 };
27
28 #endif
29
30 DEFINE_GET_MEMBER(SkDisplayRandom);
31
SkDisplayRandom()32 SkDisplayRandom::SkDisplayRandom() : blend(0), min(0), max(SK_Scalar1) {
33 }
34
35 #ifdef SK_DUMP_ENABLED
dump(SkAnimateMaker * maker)36 void SkDisplayRandom::dump(SkAnimateMaker* maker) {
37 dumpBase(maker);
38 SkDebugf("min=\"%g\" ", SkScalarToFloat(min));
39 SkDebugf("max=\"%g\" ", SkScalarToFloat(max));
40 SkDebugf("blend=\"%g\" ", SkScalarToFloat(blend));
41 SkDebugf("/>\n");
42 }
43 #endif
44
getProperty(int index,SkScriptValue * value) const45 bool SkDisplayRandom::getProperty(int index, SkScriptValue* value) const {
46 switch(index) {
47 case SK_PROPERTY(random): {
48 SkScalar random = fRandom.nextUScalar1();
49 SkScalar relativeT = SkUnitCubicInterp(random, SK_Scalar1 - blend, 0, 0, SK_Scalar1 - blend);
50 value->fOperand.fScalar = min + SkScalarMul(max - min, relativeT);
51 value->fType = SkType_Float;
52 return true;
53 }
54 default:
55 SkASSERT(0);
56 }
57 return false;
58 }
59
setProperty(int index,SkScriptValue & value)60 bool SkDisplayRandom::setProperty(int index, SkScriptValue& value) {
61 SkASSERT(index == SK_PROPERTY(seed));
62 SkASSERT(value.fType == SkType_Int);
63 fRandom.setSeed(value.fOperand.fS32);
64 return true;
65 }
66