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
13enum SkDisplayRandom_Properties {
14    SK_PROPERTY(random),
15    SK_PROPERTY(seed)
16};
17
18#if SK_USE_CONDENSED_INFO == 0
19
20const 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
30DEFINE_GET_MEMBER(SkDisplayRandom);
31
32SkDisplayRandom::SkDisplayRandom() : blend(0), min(0), max(SK_Scalar1) {
33}
34
35#ifdef SK_DUMP_ENABLED
36void 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
51bool 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
66bool 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