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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
#include "SkLayer.h"
#include "SkCanvas.h"
//#define DEBUG_DRAW_LAYER_BOUNDS
//#define DEBUG_TRACK_NEW_DELETE
#ifdef DEBUG_TRACK_NEW_DELETE
static int gLayerAllocCount;
#endif
///////////////////////////////////////////////////////////////////////////////
SkLayer::SkLayer() {
fParent = NULL;
m_opacity = SK_Scalar1;
m_size.set(0, 0);
m_position.set(0, 0);
m_anchorPoint.set(SK_ScalarHalf, SK_ScalarHalf);
fMatrix.reset();
fChildrenMatrix.reset();
#ifdef DEBUG_TRACK_NEW_DELETE
gLayerAllocCount += 1;
SkDebugf("SkLayer new: %d\n", gLayerAllocCount);
#endif
}
SkLayer::SkLayer(const SkLayer& src) {
fParent = NULL;
m_opacity = src.m_opacity;
m_size = src.m_size;
m_position = src.m_position;
m_anchorPoint = src.m_anchorPoint;
fMatrix = src.fMatrix;
fChildrenMatrix = src.fChildrenMatrix;
#ifdef DEBUG_TRACK_NEW_DELETE
gLayerAllocCount += 1;
SkDebugf("SkLayer copy: %d\n", gLayerAllocCount);
#endif
}
SkLayer::~SkLayer() {
this->removeChildren();
#ifdef DEBUG_TRACK_NEW_DELETE
gLayerAllocCount -= 1;
SkDebugf("SkLayer delete: %d\n", gLayerAllocCount);
#endif
}
///////////////////////////////////////////////////////////////////////////////
void SkLayer::setMatrix(const SkMatrix& matrix) {
fMatrix = matrix;
}
void SkLayer::setChildrenMatrix(const SkMatrix& matrix) {
fChildrenMatrix = matrix;
}
///////////////////////////////////////////////////////////////////////////////
int SkLayer::countChildren() const {
return m_children.count();
}
SkLayer* SkLayer::getChild(int index) const {
if ((unsigned)index < (unsigned)m_children.count()) {
return m_children[index];
}
return NULL;
}
SkLayer* SkLayer::addChild(SkLayer* child) {
child->ref();
if (child->fParent) {
child->fParent->removeChild(child);
}
SkASSERT(child->fParent == NULL);
child->fParent = this;
*m_children.append() = child;
return child;
}
bool SkLayer::removeChild(SkLayer* child) {
int index = m_children.find(child);
if (index >= 0) {
SkASSERT(child->fParent == this);
child->fParent = NULL;
child->unref();
m_children.remove(index);
return true;
}
return false;
}
void SkLayer::removeChildren() {
m_children.unrefAll();
m_children.reset();
}
SkLayer* SkLayer::getRootLayer() const {
const SkLayer* root = this;
while (root->fParent != NULL) {
root = root->fParent;
}
return const_cast<SkLayer*>(root);
}
///////////////////////////////////////////////////////////////////////////////
void SkLayer::getLocalTransform(SkMatrix* matrix) const {
matrix->setTranslate(m_position.fX, m_position.fY);
SkScalar tx = SkScalarMul(m_anchorPoint.fX, m_size.width());
SkScalar ty = SkScalarMul(m_anchorPoint.fY, m_size.height());
matrix->preTranslate(tx, ty);
matrix->preConcat(this->getMatrix());
matrix->preTranslate(-tx, -ty);
}
void SkLayer::localToGlobal(SkMatrix* matrix) const {
this->getLocalTransform(matrix);
const SkLayer* layer = this;
while (layer->fParent != NULL) {
layer = layer->fParent;
SkMatrix tmp;
layer->getLocalTransform(&tmp);
tmp.preConcat(layer->getChildrenMatrix());
matrix->postConcat(tmp);
}
}
///////////////////////////////////////////////////////////////////////////////
void SkLayer::onDraw(SkCanvas*, SkScalar opacity) {
// SkDebugf("----- no onDraw for %p\n", this);
}
#include "SkString.h"
void SkLayer::draw(SkCanvas* canvas, SkScalar opacity) {
#if 0
SkString str1, str2;
// this->getMatrix().toDumpString(&str1);
// this->getChildrenMatrix().toDumpString(&str2);
SkDebugf("--- drawlayer %p opacity %g size [%g %g] pos [%g %g] matrix %s children %s\n",
this, opacity * this->getOpacity(), m_size.width(), m_size.height(),
m_position.fX, m_position.fY, str1.c_str(), str2.c_str());
#endif
opacity = SkScalarMul(opacity, this->getOpacity());
if (opacity <= 0) {
// SkDebugf("---- abort drawing %p opacity %g\n", this, opacity);
return;
}
SkAutoCanvasRestore acr(canvas, true);
// apply our local transform
{
canvas->translate(m_position.fX, m_position.fY);
SkScalar tx = SkScalarMul(m_anchorPoint.fX, m_size.width());
SkScalar ty = SkScalarMul(m_anchorPoint.fY, m_size.height());
canvas->translate(tx, ty);
canvas->concat(this->getMatrix());
canvas->translate(-tx, -ty);
}
this->onDraw(canvas, opacity);
#ifdef DEBUG_DRAW_LAYER_BOUNDS
{
SkRect r = SkRect::MakeSize(this->getSize());
SkPaint p;
p.setAntiAlias(true);
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(SkIntToScalar(2));
p.setColor(0xFFFF44DD);
canvas->drawRect(r, p);
canvas->drawLine(r.fLeft, r.fTop, r.fRight, r.fBottom, p);
canvas->drawLine(r.fLeft, r.fBottom, r.fRight, r.fTop, p);
}
#endif
int count = this->countChildren();
if (count > 0) {
canvas->concat(this->getChildrenMatrix());
for (int i = 0; i < count; i++) {
this->getChild(i)->draw(canvas, opacity);
}
}
}
|
