/
ddslib.h
235 lines (205 loc) · 6.2 KB
/
ddslib.h
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
/* -----------------------------------------------------------------------------
DDS Library
Based on code from Nvidia's DDS example:
http://www.nvidia.com/object/dxtc_decompression_code.html
Copyright (c) 2003 Randy Reddig
All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright notice, this list
of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice, this
list of conditions and the following disclaimer in the documentation and/or
other materials provided with the distribution.
Neither the names of the copyright holders nor the names of its contributors may
be used to endorse or promote products derived from this software without
specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
----------------------------------------------------------------------------- */
#pragma once
#include <cstdint>
/* dds definition */
enum ddsPF_t
{
DDS_PF_ARGB8888,
DDS_PF_DXT1,
DDS_PF_DXT2,
DDS_PF_DXT3,
DDS_PF_DXT4,
DDS_PF_DXT5,
DDS_PF_DXT5_RXGB, /* Doom 3's swizzled format */
DDS_PF_UNKNOWN
};
// greebo: General parameters which depend on the DDS format
/*struct DDSLoadInfo
{
unsigned int divSize = 4;
unsigned int blockBytes;
GLenum internalFormat;
};
DDSLoadInfo loadInfoDXT1 = {
8, GL_COMPRESSED_RGBA_S3TC_DXT1
};
DdsLoadInfo loadInfoDXT3 = {
16, GL_COMPRESSED_RGBA_S3TC_DXT3
};
DdsLoadInfo loadInfoDXT5 = {
16, GL_COMPRESSED_RGBA_S3TC_DXT5
};*/
/* 16bpp stuff */
#define DDS_LOW_5 0x001F;
#define DDS_MID_6 0x07E0;
#define DDS_HIGH_5 0xF800;
#define DDS_MID_555 0x03E0;
#define DDS_HI_555 0x7C00;
/* structures */
struct ddsColorKey_t
{
unsigned int colorSpaceLowValue;
unsigned int colorSpaceHighValue;
};
struct ddsCaps_t
{
unsigned int caps1;
unsigned int caps2;
unsigned int caps3;
unsigned int caps4;
};
struct ddsMultiSampleCaps_t
{
unsigned short flipMSTypes;
unsigned short bltMSTypes;
};
struct ddsPixelFormat_t
{
unsigned int size;
unsigned int flags;
unsigned char fourCC[4];
union
{
unsigned int rgbBitCount;
unsigned int yuvBitCount;
unsigned int zBufferBitDepth;
unsigned int alphaBitDepth;
unsigned int luminanceBitCount;
unsigned int bumpBitCount;
unsigned int privateFormatBitCount;
};
union
{
unsigned int rBitMask;
unsigned int yBitMask;
unsigned int stencilBitDepth;
unsigned int luminanceBitMask;
unsigned int bumpDuBitMask;
unsigned int operations;
};
union
{
unsigned int gBitMask;
unsigned int uBitMask;
unsigned int zBitMask;
unsigned int bumpDvBitMask;
ddsMultiSampleCaps_t multiSampleCaps;
};
union
{
unsigned int bBitMask;
unsigned int vBitMask;
unsigned int stencilBitMask;
unsigned int bumpLuminanceBitMask;
};
union
{
unsigned int rgbAlphaBitMask;
unsigned int yuvAlphaBitMask;
unsigned int luminanceAlphaBitMask;
unsigned int rgbZBitMask;
unsigned int yuvZBitMask;
};
};
// DDS header flags
#define DDSD_CAPS 0x00000001
#define DDSD_HEIGHT 0x00000002
#define DDSD_WIDTH 0x00000004
#define DDSD_PITCH 0x00000008
#define DDSD_PIXELFORMAT 0x00001000
#define DDSD_MIPMAPCOUNT 0x00020000
#define DDSD_LINEARSIZE 0x00080000
#define DDSD_DEPTH 0x00800000
struct DDSHeader
{
/* magic: 'dds ' */
char magic[ 4 ];
/* directdraw surface */
uint32_t size;
uint32_t flags;
uint32_t height;
uint32_t width;
union
{
int32_t pitch;
uint32_t linearSize;
};
uint32_t backBufferCount;
union
{
uint32_t mipMapCount;
uint32_t refreshRate;
uint32_t srcVBHandle;
};
uint32_t alphaBitDepth;
uint32_t reserved;
uint32_t surface;
union
{
ddsColorKey_t ckDestOverlay;
uint32_t emptyFaceColor;
};
ddsColorKey_t ckDestBlt;
ddsColorKey_t ckSrcOverlay;
ddsColorKey_t ckSrcBlt;
ddsPixelFormat_t pixelFormat;
ddsCaps_t ddsCaps;
uint32_t textureStage;
};
struct ddsBuffer_t
{
DDSHeader header;
/* data (Varying size) */
unsigned char data[ 4 ];
};
/** greebo: This represents a 64 bit DDS block containing
* either the alpha or the colour data.
*/
struct ddsColorBlock_t
{
unsigned short colors[ 2 ];// 32 bit (2 x 16 bit)
unsigned char row[ 4 ]; // 32 bit (4 x 8 bit)
};
struct ddsAlphaBlockExplicit_t
{
unsigned short row[ 4 ];
};
struct ddsAlphaBlock3BitLinear_t
{
unsigned char alpha0;
unsigned char alpha1;
unsigned char stuff[ 6 ];
};
struct ddsColor_t
{
unsigned char r, g, b, a;
};
/* public functions */
int DDSGetInfo( const DDSHeader* header, int *width, int *height, ddsPF_t *pf );
int DDSDecompress( const DDSHeader* header, const unsigned char* buffer, unsigned char *pixels );