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
|
/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkLinearBitmapPipeline_DEFINED
#define SkLinearBitmapPipeline_DEFINED
#include "SkColor.h"
#include "SkImageInfo.h"
#include "SkMatrix.h"
#include "SkNx.h"
#include "SkShader.h"
class SkLinearBitmapPipeline {
public:
SkLinearBitmapPipeline(
const SkMatrix& inverse,
SkFilterQuality filterQuality,
SkShader::TileMode xTile, SkShader::TileMode yTile,
const SkPixmap& srcPixmap);
~SkLinearBitmapPipeline();
void shadeSpan4f(int x, int y, SkPM4f* dst, int count);
template<typename Base, size_t kSize>
class PolymorphicUnion {
public:
PolymorphicUnion() : fIsInitialized{false} {}
~PolymorphicUnion() {
if (fIsInitialized) {
get()->~Base();
}
}
template<typename Variant, typename... Args>
void Initialize(Args&&... args) {
SkASSERTF(sizeof(Variant) <= sizeof(fSpace),
"Size Variant: %d, Space: %d", sizeof(Variant), sizeof(fSpace));
new(&fSpace) Variant(std::forward<Args>(args)...);
fIsInitialized = true;
};
Base* get() const { return reinterpret_cast<Base*>(&fSpace); }
Base* operator->() const { return get(); }
Base& operator*() const { return *get(); }
private:
struct SK_STRUCT_ALIGN(16) Space {
char space[kSize];
};
bool fIsInitialized;
mutable Space fSpace;
};
class PointProcessorInterface;
class BilerpProcessorInterface;
class PixelPlacerInterface;
using MatrixStage = PolymorphicUnion<PointProcessorInterface, 112>;
using FilterStage = PolymorphicUnion<PointProcessorInterface, 8>;
using TileStage = PolymorphicUnion<BilerpProcessorInterface, 96>;
using SampleStage = PolymorphicUnion<BilerpProcessorInterface, 80>;
using PixelStage = PolymorphicUnion<PixelPlacerInterface, 80>;
private:
PointProcessorInterface* fFirstStage;
MatrixStage fMatrixStage;
FilterStage fFilterStage;
TileStage fTileXOrBothStage;
TileStage fTileYStage;
SampleStage fSampleStage;
PixelStage fPixelStage;
};
#endif // SkLinearBitmapPipeline_DEFINED
|