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1// Copyright (C) 2008-2012 Nikolaus Gebhardt
2// This file is part of the "Irrlicht Engine".
3// For conditions of distribution and use, see copyright notice in irrlicht.h
4
5#ifndef __C_INDEX_BUFFER_H_INCLUDED__
6#define __C_INDEX_BUFFER_H_INCLUDED__
7
8#include "IIndexBuffer.h"
9
10namespace irr
11{
12namespace scene
13{
14
15 class CIndexBuffer : public IIndexBuffer
16 {
17
18 class IIndexList
19 {
20 public:
21 virtual ~IIndexList(){};
22
23 virtual u32 stride() const =0;
24 virtual u32 size() const =0;
25 virtual void push_back(const u32 &element) =0;
26 virtual u32 operator [](u32 index) const =0;
27 virtual u32 getLast() =0;
28 virtual void setValue(u32 index, u32 value) =0;
29 virtual void set_used(u32 usedNow) =0;
30 virtual void reallocate(u32 new_size) =0;
31 virtual u32 allocated_size() const =0;
32 virtual void* pointer() =0;
33 virtual video::E_INDEX_TYPE getType() const =0;
34 };
35
36 template <class T>
37 class CSpecificIndexList : public IIndexList
38 {
39 public:
40 core::array<T> Indices;
41
42 virtual u32 stride() const {return sizeof(T);}
43
44 virtual u32 size() const {return Indices.size();}
45
46 virtual void push_back(const u32 &element)
47 {
48 // push const ref due to compiler problem with gcc 4.6, big endian
49 Indices.push_back((const T&)element);
50 }
51
52 virtual u32 operator [](u32 index) const
53 {
54 return (u32)(Indices[index]);
55 }
56
57 virtual u32 getLast() {return (u32)Indices.getLast();}
58
59 virtual void setValue(u32 index, u32 value)
60 {
61 Indices[index]=(T)value;
62 }
63
64 virtual void set_used(u32 usedNow)
65 {
66 Indices.set_used(usedNow);
67 }
68
69 virtual void reallocate(u32 new_size)
70 {
71 Indices.reallocate(new_size);
72 }
73
74 virtual u32 allocated_size() const
75 {
76 return Indices.allocated_size();
77 }
78
79 virtual void* pointer() {return Indices.pointer();}
80
81 virtual video::E_INDEX_TYPE getType() const
82 {
83 if (sizeof(T)==sizeof(u16))
84 return video::EIT_16BIT;
85 else
86 return video::EIT_32BIT;
87 }
88 };
89
90 public:
91 IIndexList *Indices;
92
93 CIndexBuffer(video::E_INDEX_TYPE IndexType) :Indices(0), MappingHint(EHM_NEVER), ChangedID(1)
94 {
95 setType(IndexType);
96 }
97
98 CIndexBuffer(const IIndexBuffer &IndexBufferCopy) :Indices(0), MappingHint(EHM_NEVER), ChangedID(1)
99 {
100 setType(IndexBufferCopy.getType());
101 reallocate(IndexBufferCopy.size());
102
103 for (u32 n=0;n<IndexBufferCopy.size();++n)
104 push_back(IndexBufferCopy[n]);
105 }
106
107 virtual ~CIndexBuffer()
108 {
109 delete Indices;
110 }
111
112 //virtual void setType(video::E_INDEX_TYPE IndexType);
113 virtual void setType(video::E_INDEX_TYPE IndexType)
114 {
115 IIndexList *NewIndices=0;
116
117 switch (IndexType)
118 {
119 case video::EIT_16BIT:
120 {
121 NewIndices=new CSpecificIndexList<u16>;
122 break;
123 }
124 case video::EIT_32BIT:
125 {
126 NewIndices=new CSpecificIndexList<u32>;
127 break;
128 }
129 }
130
131 if (Indices)
132 {
133 NewIndices->reallocate( Indices->size() );
134
135 for(u32 n=0;n<Indices->size();++n)
136 NewIndices->push_back((*Indices)[n]);
137
138 delete Indices;
139 }
140
141 Indices=NewIndices;
142 }
143
144 virtual void* getData() {return Indices->pointer();}
145
146 virtual video::E_INDEX_TYPE getType() const {return Indices->getType();}
147
148 virtual u32 stride() const {return Indices->stride();}
149
150 virtual u32 size() const
151 {
152 return Indices->size();
153 }
154
155 virtual void push_back(const u32 &element)
156 {
157 Indices->push_back(element);
158 }
159
160 virtual u32 operator [](u32 index) const
161 {
162 return (*Indices)[index];
163 }
164
165 virtual u32 getLast()
166 {
167 return Indices->getLast();
168 }
169
170 virtual void setValue(u32 index, u32 value)
171 {
172 Indices->setValue(index, value);
173 }
174
175 virtual void set_used(u32 usedNow)
176 {
177 Indices->set_used(usedNow);
178 }
179
180 virtual void reallocate(u32 new_size)
181 {
182 Indices->reallocate(new_size);
183 }
184
185 virtual u32 allocated_size() const
186 {
187 return Indices->allocated_size();
188 }
189
190 virtual void* pointer()
191 {
192 return Indices->pointer();
193 }
194
195 //! get the current hardware mapping hint
196 virtual E_HARDWARE_MAPPING getHardwareMappingHint() const
197 {
198 return MappingHint;
199 }
200
201 //! set the hardware mapping hint, for driver
202 virtual void setHardwareMappingHint( E_HARDWARE_MAPPING NewMappingHint )
203 {
204 MappingHint=NewMappingHint;
205 }
206
207 //! flags the mesh as changed, reloads hardware buffers
208 virtual void setDirty()
209 {
210 ++ChangedID;
211 }
212
213 //! Get the currently used ID for identification of changes.
214 /** This shouldn't be used for anything outside the VideoDriver. */
215 virtual u32 getChangedID() const {return ChangedID;}
216
217 E_HARDWARE_MAPPING MappingHint;
218 u32 ChangedID;
219 };
220
221
222} // end namespace scene
223} // end namespace irr
224
225#endif
226