1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "SMILIntegerType.h"
#include "mozilla/SMILValue.h"
#include "nsDebug.h"
#include <math.h>
namespace mozilla {
void SMILIntegerType::Init(SMILValue& aValue) const {
MOZ_ASSERT(aValue.IsNull(), "Unexpected value type");
aValue.mU.mInt = 0;
aValue.mType = this;
}
void SMILIntegerType::Destroy(SMILValue& aValue) const {
MOZ_ASSERT(aValue.mType == this, "Unexpected SMIL value");
aValue.mU.mInt = 0;
aValue.mType = SMILNullType::Singleton();
}
nsresult SMILIntegerType::Assign(SMILValue& aDest,
const SMILValue& aSrc) const {
MOZ_ASSERT(aDest.mType == aSrc.mType, "Incompatible SMIL types");
MOZ_ASSERT(aDest.mType == this, "Unexpected SMIL value");
aDest.mU.mInt = aSrc.mU.mInt;
return NS_OK;
}
bool SMILIntegerType::IsEqual(const SMILValue& aLeft,
const SMILValue& aRight) const {
MOZ_ASSERT(aLeft.mType == aRight.mType, "Incompatible SMIL types");
MOZ_ASSERT(aLeft.mType == this, "Unexpected type for SMIL value");
return aLeft.mU.mInt == aRight.mU.mInt;
}
nsresult SMILIntegerType::Add(SMILValue& aDest, const SMILValue& aValueToAdd,
uint32_t aCount) const {
MOZ_ASSERT(aValueToAdd.mType == aDest.mType, "Trying to add invalid types");
MOZ_ASSERT(aValueToAdd.mType == this, "Unexpected source type");
aDest.mU.mInt += aValueToAdd.mU.mInt * aCount;
return NS_OK;
}
nsresult SMILIntegerType::ComputeDistance(const SMILValue& aFrom,
const SMILValue& aTo,
double& aDistance) const {
MOZ_ASSERT(aFrom.mType == aTo.mType, "Trying to compare different types");
MOZ_ASSERT(aFrom.mType == this, "Unexpected source type");
aDistance = fabs(double(aTo.mU.mInt - aFrom.mU.mInt));
return NS_OK;
}
nsresult SMILIntegerType::Interpolate(const SMILValue& aStartVal,
const SMILValue& aEndVal,
double aUnitDistance,
SMILValue& aResult) const {
MOZ_ASSERT(aStartVal.mType == aEndVal.mType,
"Trying to interpolate different types");
MOZ_ASSERT(aStartVal.mType == this, "Unexpected types for interpolation");
MOZ_ASSERT(aResult.mType == this, "Unexpected result type");
const double startVal = double(aStartVal.mU.mInt);
const double endVal = double(aEndVal.mU.mInt);
const double currentVal = startVal + (endVal - startVal) * aUnitDistance;
// When currentVal is exactly midway between its two nearest integers, we
// jump to the "next" integer to provide simple, easy to remember and
// consistent behaviour (from the SMIL author's point of view).
if (startVal < endVal) {
aResult.mU.mInt = int64_t(floor(currentVal + 0.5)); // round mid up
} else {
aResult.mU.mInt = int64_t(ceil(currentVal - 0.5)); // round mid down
}
return NS_OK;
}
} // namespace mozilla
|
