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
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
// Some shared code used by both SkBigPicture and SkMiniPicture.
// SkTextHunter -- SkRecord visitor that returns true when the op draws text.
// SkBitmapHunter -- SkRecord visitor that returns true when the op draws a bitmap or image.
// SkPathCounter -- SkRecord visitor that counts paths that draw slowly on the GPU.
#include "SkPathEffect.h"
#include "SkRecords.h"
#include "SkTLogic.h"
// N.B. This name is slightly historical: hunting season is now open for SkImages too.
struct SkBitmapHunter {
// Some ops have a paint, some have an optional paint. Either way, get back a pointer.
static const SkPaint* AsPtr(const SkPaint& p) { return &p; }
static const SkPaint* AsPtr(const SkRecords::Optional<SkPaint>& p) { return p; }
// Main entry for visitor:
// If the op is a DrawPicture, recurse.
// If the op has a bitmap or image directly, return true.
// If the op has a paint and the paint has a bitmap, return true.
// Otherwise, return false.
bool operator()(const SkRecords::DrawPicture& op) { return op.picture->willPlayBackBitmaps(); }
bool operator()(const SkRecords::DrawDrawable&) { /*TODO*/ return false; }
template <typename T>
bool operator()(const T& op) { return CheckBitmap(op); }
// If the op is tagged as having an image, return true.
template <typename T>
static SK_WHEN(T::kTags & SkRecords::kHasImage_Tag, bool) CheckBitmap(const T&) {
return true;
}
// If not, look for one in its paint (if it has a paint).
template <typename T>
static SK_WHEN(!(T::kTags & SkRecords::kHasImage_Tag), bool) CheckBitmap(const T& op) {
return CheckPaint(op);
}
// Most draws-type ops have paints.
template <typename T>
static SK_WHEN(T::kTags & SkRecords::kDraw_Tag, bool) CheckPaint(const T& op) {
return PaintHasBitmap(AsPtr(op.paint));
}
// SaveLayers also have a paint to check.
static bool CheckPaint(const SkRecords::SaveLayer& op) {
return PaintHasBitmap(AsPtr(op.paint));
}
// Shouldn't be any non-Draw non-SaveLayer ops with paints.
template <typename T>
static SK_WHEN(!(T::kTags & SkRecords::kDraw_Tag), bool) CheckPaint(const T&) {
return false;
}
private:
static bool PaintHasBitmap(const SkPaint* paint) {
if (paint) {
const SkShader* shader = paint->getShader();
if (shader && shader->isABitmap()) {
return true;
}
}
return false;
}
};
// TODO: might be nicer to have operator() return an int (the number of slow paths) ?
struct SkPathCounter {
// Some ops have a paint, some have an optional paint. Either way, get back a pointer.
static const SkPaint* AsPtr(const SkPaint& p) { return &p; }
static const SkPaint* AsPtr(const SkRecords::Optional<SkPaint>& p) { return p; }
SkPathCounter() : fNumSlowPathsAndDashEffects(0) {}
// Recurse into nested pictures.
void operator()(const SkRecords::DrawPicture& op) {
fNumSlowPathsAndDashEffects += op.picture->numSlowPaths();
}
void operator()(const SkRecords::DrawDrawable&) { /* TODO */ }
void checkPaint(const SkPaint* paint) {
if (paint && paint->getPathEffect()) {
// Initially assume it's slow.
fNumSlowPathsAndDashEffects++;
}
}
void operator()(const SkRecords::DrawPoints& op) {
this->checkPaint(&op.paint);
const SkPathEffect* effect = op.paint.getPathEffect();
if (effect) {
SkPathEffect::DashInfo info;
SkPathEffect::DashType dashType = effect->asADash(&info);
if (2 == op.count && SkPaint::kRound_Cap != op.paint.getStrokeCap() &&
SkPathEffect::kDash_DashType == dashType && 2 == info.fCount) {
fNumSlowPathsAndDashEffects--;
}
}
}
void operator()(const SkRecords::DrawPath& op) {
this->checkPaint(&op.paint);
if (op.paint.isAntiAlias() && !op.path.isConvex()) {
SkPaint::Style paintStyle = op.paint.getStyle();
const SkRect& pathBounds = op.path.getBounds();
if (SkPaint::kStroke_Style == paintStyle &&
0 == op.paint.getStrokeWidth()) {
// AA hairline concave path is not slow.
} else if (SkPaint::kFill_Style == paintStyle && pathBounds.width() < 64.f &&
pathBounds.height() < 64.f && !op.path.isVolatile()) {
// AADF eligible concave path is not slow.
} else {
fNumSlowPathsAndDashEffects++;
}
}
}
void operator()(const SkRecords::ClipPath& op) {
// TODO: does the SkRegion op matter?
if (op.opAA.aa && !op.path.isConvex()) {
fNumSlowPathsAndDashEffects++;
}
}
void operator()(const SkRecords::SaveLayer& op) {
this->checkPaint(AsPtr(op.paint));
}
template <typename T>
SK_WHEN(T::kTags & SkRecords::kDraw_Tag, void) operator()(const T& op) {
this->checkPaint(AsPtr(op.paint));
}
template <typename T>
SK_WHEN(!(T::kTags & SkRecords::kDraw_Tag), void) operator()(const T& op) { /* do nothing */ }
int fNumSlowPathsAndDashEffects;
};
|
