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
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
|
// Geometric Tools, LLC
// Copyright (c) 1998-2014
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
// http://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
//
// File Version: 5.0.1 (2011/05/01)
#include "Wm5GraphicsPCH.h"
#include "Wm5TextureCube.h"
#include "Wm5BitHacks.h"
#include "Wm5Renderer.h"
using namespace Wm5;
WM5_IMPLEMENT_RTTI(Wm5, Texture, TextureCube);
WM5_IMPLEMENT_STREAM(TextureCube);
WM5_IMPLEMENT_FACTORY(TextureCube);
WM5_IMPLEMENT_DEFAULT_NAMES(Texture, TextureCube);
WM5_IMPLEMENT_DEFAULT_STREAM(Texture, TextureCube);
//----------------------------------------------------------------------------
TextureCube::TextureCube (Format tformat, int dimension, int numLevels,
Buffer::Usage usage)
:
Texture(tformat, TT_CUBE, usage, numLevels)
{
assertion(dimension > 0, "Dimension must be positive\n");
mDimension[0][0] = dimension;
mDimension[1][0] = dimension;
unsigned int logDim = Log2OfPowerOfTwo((unsigned int)dimension);
int maxLevels = (int)logDim + 1;
if (numLevels == 0)
{
// The user wants the maximum number of levels.
mNumLevels = maxLevels;
}
else if (numLevels <= maxLevels)
{
// The user wants the specified number of levels.
mNumLevels = numLevels;
}
else
{
assertion(false, "Invalid number of levels\n");
}
ComputeNumLevelBytes();
mData = new1<char>(mNumTotalBytes);
}
//----------------------------------------------------------------------------
TextureCube::~TextureCube ()
{
Renderer::UnbindAll(this);
}
//----------------------------------------------------------------------------
void TextureCube::GenerateMipmaps ()
{
// Destroy the texture bindings if it does not have the maximum miplevels.
// The bindings will be recreated later.
unsigned int logDim = Log2OfPowerOfTwo((unsigned int)mDimension[0][0]);
int maxLevels = (int)logDim + 1;
int face, faceOffset, level;
bool retainBindings = true;
if (mNumLevels != maxLevels)
{
retainBindings = false;
Renderer::UnbindAll(this);
mNumLevels = maxLevels;
int oldNumTotalBytes = mNumTotalBytes/6;
ComputeNumLevelBytes();
char* newData = new1<char>(mNumTotalBytes);
for (face = 0; face < 6; ++face)
{
int oldFaceOffset = face*oldNumTotalBytes;
faceOffset = face*mNumTotalBytes/6;
memcpy(newData + faceOffset, mData + oldFaceOffset,
mNumLevelBytes[0]);
}
delete1(mData);
mData = newData;
}
// Temporary storage for generating mipmaps.
Float4* rgba = new1<Float4>(mDimension[0][0]*mDimension[1][0]);
for (face = 0; face < 6; ++face)
{
faceOffset = face*mNumTotalBytes/6;
char* texels = mData + faceOffset;
int dimension = mDimension[0][0];
for (level = 1; level < mNumLevels; ++level)
{
char* texelsNext = mData + faceOffset + mLevelOffsets[level];
int dimensionNext = mDimension[0][level];
GenerateNextMipmap(dimension, texels, dimensionNext, texelsNext,
rgba);
dimension = dimensionNext;
texels = texelsNext;
}
}
delete1(rgba);
if (retainBindings)
{
for (face = 0; face < 6; ++face)
{
for (level = 0; level < mNumLevels; ++level)
{
Renderer::UpdateAll(this, face, level);
}
}
}
}
//----------------------------------------------------------------------------
bool TextureCube::HasMipmaps () const
{
unsigned int logDim = Log2OfPowerOfTwo((unsigned int)mDimension[0][0]);
int maxLevels = (int)logDim + 1;
return mNumLevels == maxLevels;
}
//----------------------------------------------------------------------------
char* TextureCube::GetData (int face, int level) const
{
if (mData && 0 <= face && face < 6 && 0 <= level && level < mNumLevels)
{
int faceOffset = face*mNumTotalBytes/6;
return mData + faceOffset + mLevelOffsets[level];
}
assertion(false, "Null pointer or invalid level in GetData\n");
return 0;
}
//----------------------------------------------------------------------------
void TextureCube::ComputeNumLevelBytes ()
{
if (mFormat == TF_R32F
|| mFormat == TF_G32R32F
|| mFormat == TF_A32B32G32R32F)
{
if (mNumLevels > 1)
{
assertion(false, "No mipmaps for 32-bit float textures\n");
mNumLevels = 1;
}
}
else if (mFormat == TF_D24S8)
{
if (mNumLevels > 1)
{
assertion(false, "No mipmaps for 2D depth textures\n");
mNumLevels = 1;
}
}
int dim0 = mDimension[0][0];
int dim1 = mDimension[1][0];
int level;
mNumTotalBytes = 0;
if (mFormat == TF_DXT1)
{
for (level = 0; level < mNumLevels; ++level)
{
int max0 = dim0/4;
if (max0 < 1)
{
max0 = 1;
}
int max1 = dim1/4;
if (max1 < 1)
{
max1 = 1;
}
mNumLevelBytes[level] = 8*max0*max1;
mNumTotalBytes += mNumLevelBytes[level];
mDimension[0][level] = dim0;
mDimension[1][level] = dim1;
if (dim0 > 1)
{
dim0 >>= 1;
}
if (dim1 > 1)
{
dim1 >>= 1;
}
}
}
else if (mFormat == TF_DXT3 || mFormat == TF_DXT5)
{
for (level = 0; level < mNumLevels; ++level)
{
int max0 = dim0/4;
if (max0 < 1)
{
max0 = 1;
}
int max1 = dim1/4;
if (max1 < 1)
{
max1 = 1;
}
mNumLevelBytes[level] = 16*max0*max1;
mNumTotalBytes += mNumLevelBytes[level];
mDimension[0][level] = dim0;
mDimension[1][level] = dim1;
if (dim0 > 1)
{
dim0 >>= 1;
}
if (dim1 > 1)
{
dim1 >>= 1;
}
}
}
else
{
for (level = 0; level < mNumLevels; ++level)
{
mNumLevelBytes[level] = msPixelSize[mFormat]*dim0*dim1;
mNumTotalBytes += mNumLevelBytes[level];
mDimension[0][level] = dim0;
mDimension[1][level] = dim1;
if (dim0 > 1)
{
dim0 >>= 1;
}
if (dim1 > 1)
{
dim1 >>= 1;
}
}
}
mNumTotalBytes *= 6;
mLevelOffsets[0] = 0;
for (level = 0; level < mNumLevels-1; ++level)
{
mLevelOffsets[level+1] = mLevelOffsets[level] + mNumLevelBytes[level];
}
}
//----------------------------------------------------------------------------
void TextureCube::GenerateNextMipmap (int dimension, const char* texels,
int dimensionNext, char* texelsNext, Float4* rgba)
{
// Convert the texels from native format to 32-bit RGBA.
int numTexels = dimension*dimension;
msConvertFrom[mFormat](numTexels, texels, rgba);
// Create the next miplevel in-place.
for (int i1 = 0; i1 < dimensionNext; ++i1)
{
for (int i0 = 0; i0 < dimensionNext; ++i0)
{
int j = i0 + dimensionNext*i1;
int base = 2*(i0 + dimension*i1);
for (int c = 0; c < 4; ++c)
{
rgba[j][c] = 0.25f*(
rgba[base][c] +
rgba[base + 1][c] +
rgba[base + dimension][c] +
rgba[base + dimension + 1][c]);
}
}
}
// Convert the texels from 32-bit RGBA to native format.
int numTexelsNext = dimensionNext*dimensionNext;
msConvertTo[mFormat](numTexelsNext, rgba, texelsNext);
}
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
// Support for load of raw data.
//----------------------------------------------------------------------------
TextureCube* TextureCube::LoadWMTF (const std::string& name, int mode)
{
Texture* texture = Texture::LoadWMTF(name, mode);
if (texture && texture->IsExactly(TextureCube::TYPE))
{
return (TextureCube*)texture;
}
delete0(texture);
return 0;
}
//----------------------------------------------------------------------------
|
