1 /*
2 * Copyright (c) 2020 Samsung Electronics Co., Ltd. All rights reserved.
3
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20 * SOFTWARE.
21 */
22
23 #ifndef VRLE_H
24 #define VRLE_H
25
26 #include <vector>
27 #include "vcowptr.h"
28 #include "vglobal.h"
29 #include "vpoint.h"
30 #include "vrect.h"
31
32 V_BEGIN_NAMESPACE
33
34 class VRle {
35 public:
36 struct Span {
37 short x{0};
38 short y{0};
39 ushort len{0};
40 uchar coverage{0};
41 };
42 using VRleSpanCb = void (*)(size_t count, const VRle::Span *spans,
43 void *userData);
empty()44 bool empty() const { return d->empty(); }
boundingRect()45 VRect boundingRect() const { return d->bbox(); }
setBoundingRect(const VRect & bbox)46 void setBoundingRect(const VRect &bbox) { d->setBbox(bbox); }
addSpan(const VRle::Span * span,size_t count)47 void addSpan(const VRle::Span *span, size_t count)
48 {
49 d.write().addSpan(span, count);
50 }
51
reset()52 void reset() { d.write().reset(); }
translate(const VPoint & p)53 void translate(const VPoint &p) { d.write().translate(p); }
54
55 void operator*=(uchar alpha) { d.write() *= alpha; }
56
57 void intersect(const VRect &r, VRleSpanCb cb, void *userData) const;
58 void intersect(const VRle &rle, VRleSpanCb cb, void *userData) const;
59
60 void operator&=(const VRle &o);
61 VRle operator&(const VRle &o) const;
62 VRle operator-(const VRle &o) const;
63 VRle operator+(const VRle &o) const { return opGeneric(o, Data::Op::Add); }
64 VRle operator^(const VRle &o) const { return opGeneric(o, Data::Op::Xor); }
65
66 friend VRle operator-(const VRect &rect, const VRle &o);
67 friend VRle operator&(const VRect &rect, const VRle &o);
68
unique()69 bool unique() const { return d.unique(); }
refCount()70 size_t refCount() const { return d.refCount(); }
clone(const VRle & o)71 void clone(const VRle &o) { d.write().clone(o.d.read()); }
72
73 public:
74 struct View {
75 Span * _data;
76 size_t _size;
ViewView77 View(const Span *data, size_t sz) : _data((Span *)data), _size(sz) {}
dataView78 Span * data() { return _data; }
sizeView79 size_t size() { return _size; }
80 };
81 struct Data {
82 enum class Op { Add, Xor, Substract };
viewData83 VRle::View view() const
84 {
85 return VRle::View(mSpans.data(), mSpans.size());
86 }
emptyData87 bool empty() const { return mSpans.empty(); }
88 void addSpan(const VRle::Span *span, size_t count);
89 void updateBbox() const;
90 VRect bbox() const;
91 void setBbox(const VRect &bbox) const;
92 void reset();
93 void translate(const VPoint &p);
94 void operator*=(uchar alpha);
95 void opGeneric(const VRle::Data &, const VRle::Data &, Op code);
96 void opSubstract(const VRle::Data &, const VRle::Data &);
97 void opIntersect(VRle::View a, VRle::View b);
98 void opIntersect(const VRect &, VRle::VRleSpanCb, void *) const;
99 void addRect(const VRect &rect);
100 void clone(const VRle::Data &);
101
102 std::vector<VRle::Span> mSpans;
103 VPoint mOffset;
104 mutable VRect mBbox;
105 mutable bool mBboxDirty = true;
106 };
107
108 private:
109 VRle opGeneric(const VRle &o, Data::Op opcode) const;
110
111 vcow_ptr<Data> d;
112 };
113
intersect(const VRect & r,VRleSpanCb cb,void * userData)114 inline void VRle::intersect(const VRect &r, VRleSpanCb cb, void *userData) const
115 {
116 d->opIntersect(r, cb, userData);
117 }
118
119 V_END_NAMESPACE
120
121 #endif // VRLE_H
122