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 #ifdef SK_CAN_USE_FLOAT
39 SkDebugf("min=\"%g\" ", SkScalarToFloat(min));
40 SkDebugf("max=\"%g\" ", SkScalarToFloat(max));
41 SkDebugf("blend=\"%g\" ", SkScalarToFloat(blend));
42 #else
43 SkDebugf("min=\"%x\" ", min);
44 SkDebugf("max=\"%x\" ", max);
45 SkDebugf("blend=\"%x\" ", blend);
46 #endif
47 SkDebugf("/>\n");
48 }
49 #endif
50
getProperty(int index,SkScriptValue * value) const51 bool SkDisplayRandom::getProperty(int index, SkScriptValue* value) const {
52 switch(index) {
53 case SK_PROPERTY(random): {
54 SkScalar random = fRandom.nextUScalar1();
55 SkScalar relativeT = SkUnitCubicInterp(random, SK_Scalar1 - blend, 0, 0, SK_Scalar1 - blend);
56 value->fOperand.fScalar = min + SkScalarMul(max - min, relativeT);
57 value->fType = SkType_Float;
58 return true;
59 }
60 default:
61 SkASSERT(0);
62 }
63 return false;
64 }
65
setProperty(int index,SkScriptValue & value)66 bool SkDisplayRandom::setProperty(int index, SkScriptValue& value) {
67 SkASSERT(index == SK_PROPERTY(seed));
68 SkASSERT(value.fType == SkType_Int);
69 fRandom.setSeed(value.fOperand.fS32);
70 return true;
71 }
72
73