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Side by Side Diff: skia/effects/SkLayerDrawLooper.cpp

Issue 113827: Remove the remainder of the skia source code from the Chromium repo.... (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/
Patch Set: Created 11 years, 7 months ago
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1 #include "SkCanvas.h"
2 #include "SkLayerDrawLooper.h"
3 #include "SkPaint.h"
4
5 SkLayerDrawLooper::SkLayerDrawLooper() {
6 fRecs = NULL;
7 fCount = 0;
8 }
9
10 SkLayerDrawLooper::~SkLayerDrawLooper() {
11 Rec* rec = fRecs;
12 while (rec) {
13 Rec* next = rec->fNext;
14 SkDELETE(rec);
15 rec = next;
16 }
17 }
18
19 SkPaint* SkLayerDrawLooper::addLayer(SkScalar dx, SkScalar dy) {
20 fCount += 1;
21
22 Rec* rec = SkNEW(Rec);
23 rec->fNext = fRecs;
24 rec->fOffset.set(dx, dy);
25 fRecs = rec;
26
27 return &rec->fPaint;
28 }
29
30 void SkLayerDrawLooper::init(SkCanvas* canvas, SkPaint* paint) {
31 fIter.fSavedPaint = *paint;
32 fIter.fPaint = paint;
33 fIter.fCanvas = canvas;
34 fIter.fRec = fRecs;
35 canvas->save(SkCanvas::kMatrix_SaveFlag);
36 }
37
38 bool SkLayerDrawLooper::next() {
39 Rec* rec = fIter.fRec;
40 if (rec) {
41 *fIter.fPaint = rec->fPaint;
42 fIter.fCanvas->restore();
43 fIter.fCanvas->save(SkCanvas::kMatrix_SaveFlag);
44 fIter.fCanvas->translate(rec->fOffset.fX, rec->fOffset.fY);
45
46 fIter.fRec = rec->fNext;
47 return true;
48 }
49 return false;
50 }
51
52 void SkLayerDrawLooper::restore() {
53 fIter.fCanvas->restore();
54 *fIter.fPaint = fIter.fSavedPaint;
55 }
56
57 SkLayerDrawLooper::Rec* SkLayerDrawLooper::Rec::Reverse(Rec* head) {
58 Rec* rec = head;
59 Rec* prev = NULL;
60 while (rec) {
61 Rec* next = rec->fNext;
62 rec->fNext = prev;
63 prev = rec;
64 rec = next;
65 }
66 return prev;
67 }
68
69 ///////////////////////////////////////////////////////////////////////////////
70
71 void SkLayerDrawLooper::flatten(SkFlattenableWriteBuffer& buffer) {
72 this->INHERITED::flatten(buffer);
73
74 #ifdef SK_DEBUG
75 {
76 Rec* rec = fRecs;
77 int count = 0;
78 while (rec) {
79 rec = rec->fNext;
80 count += 1;
81 }
82 SkASSERT(count == fCount);
83 }
84 #endif
85
86 buffer.writeInt(fCount);
87
88 Rec* rec = fRecs;
89 for (int i = 0; i < fCount; i++) {
90 buffer.writeScalar(rec->fOffset.fX);
91 buffer.writeScalar(rec->fOffset.fY);
92 rec->fPaint.flatten(buffer);
93 rec = rec->fNext;
94 }
95 }
96
97 SkLayerDrawLooper::SkLayerDrawLooper(SkFlattenableReadBuffer& buffer)
98 : INHERITED(buffer) {
99 fRecs = NULL;
100 fCount = 0;
101
102 int count = buffer.readInt();
103
104 for (int i = 0; i < count; i++) {
105 SkScalar dx = buffer.readScalar();
106 SkScalar dy = buffer.readScalar();
107 this->addLayer(dx, dy)->unflatten(buffer);
108 }
109 SkASSERT(count == fCount);
110
111 // we're in reverse order, so fix it now
112 fRecs = Rec::Reverse(fRecs);
113
114 #ifdef SK_DEBUG
115 {
116 Rec* rec = fRecs;
117 int n = 0;
118 while (rec) {
119 rec = rec->fNext;
120 n += 1;
121 }
122 SkASSERT(count == n);
123 }
124 #endif
125 }
126
127 ///////////////////////////////////////////////////////////////////////////////
128
129 static SkFlattenable::Registrar gReg("SkLayerDrawLooper",
130 SkLayerDrawLooper::CreateProc);
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