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
|
/**
* \file format_utils.h
* A collection of format conversion utility functions.
*/
/*
* Mesa 3-D graphics library
*
* Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
* Copyright (C) 2014 Intel Corporation All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef FORMAT_UTILS_H
#define FORMAT_UTILS_H
#include "imports.h"
#include "macros.h"
extern const mesa_array_format RGBA32_FLOAT;
extern const mesa_array_format RGBA8_UBYTE;
extern const mesa_array_format RGBA32_UINT;
extern const mesa_array_format RGBA32_INT;
/* Only guaranteed to work for BITS <= 32 */
#define MAX_UINT(BITS) ((BITS) == 32 ? UINT32_MAX : ((1u << (BITS)) - 1))
#define MAX_INT(BITS) ((int)MAX_UINT((BITS) - 1))
#define MIN_INT(BITS) ((BITS) == 32 ? INT32_MIN : (-(1 << (BITS - 1))))
/* Extends an integer of size SRC_BITS to one of size DST_BITS linearly */
#define EXTEND_NORMALIZED_INT(X, SRC_BITS, DST_BITS) \
(((X) * (int)(MAX_UINT(DST_BITS) / MAX_UINT(SRC_BITS))) + \
((DST_BITS % SRC_BITS) ? ((X) >> (SRC_BITS - DST_BITS % SRC_BITS)) : 0))
static inline float
_mesa_unorm_to_float(unsigned x, unsigned src_bits)
{
return x * (1.0f / (float)MAX_UINT(src_bits));
}
static inline float
_mesa_snorm_to_float(int x, unsigned src_bits)
{
if (x <= -MAX_INT(src_bits))
return -1.0f;
else
return x * (1.0f / (float)MAX_INT(src_bits));
}
static inline uint16_t
_mesa_unorm_to_half(unsigned x, unsigned src_bits)
{
return _mesa_float_to_half(_mesa_unorm_to_float(x, src_bits));
}
static inline uint16_t
_mesa_snorm_to_half(int x, unsigned src_bits)
{
return _mesa_float_to_half(_mesa_snorm_to_float(x, src_bits));
}
static inline unsigned
_mesa_float_to_unorm(float x, unsigned dst_bits)
{
if (x < 0.0f)
return 0;
else if (x > 1.0f)
return MAX_UINT(dst_bits);
else
return F_TO_I(x * MAX_UINT(dst_bits));
}
static inline unsigned
_mesa_half_to_unorm(uint16_t x, unsigned dst_bits)
{
return _mesa_float_to_unorm(_mesa_half_to_float(x), dst_bits);
}
static inline unsigned
_mesa_unorm_to_unorm(unsigned x, unsigned src_bits, unsigned dst_bits)
{
if (src_bits < dst_bits) {
return EXTEND_NORMALIZED_INT(x, src_bits, dst_bits);
} else {
unsigned src_half = (1 << (src_bits - 1)) - 1;
if (src_bits + dst_bits > sizeof(x) * 8) {
assert(src_bits + dst_bits <= sizeof(uint64_t) * 8);
return (((uint64_t) x * MAX_UINT(dst_bits) + src_half) /
MAX_UINT(src_bits));
} else {
return (x * MAX_UINT(dst_bits) + src_half) / MAX_UINT(src_bits);
}
}
}
static inline unsigned
_mesa_snorm_to_unorm(int x, unsigned src_bits, unsigned dst_bits)
{
if (x < 0)
return 0;
else
return _mesa_unorm_to_unorm(x, src_bits - 1, dst_bits);
}
static inline int
_mesa_float_to_snorm(float x, unsigned dst_bits)
{
if (x < -1.0f)
return -MAX_INT(dst_bits);
else if (x > 1.0f)
return MAX_INT(dst_bits);
else
return F_TO_I(x * MAX_INT(dst_bits));
}
static inline int
_mesa_half_to_snorm(uint16_t x, unsigned dst_bits)
{
return _mesa_float_to_snorm(_mesa_half_to_float(x), dst_bits);
}
static inline int
_mesa_unorm_to_snorm(unsigned x, unsigned src_bits, unsigned dst_bits)
{
return _mesa_unorm_to_unorm(x, src_bits, dst_bits - 1);
}
static inline int
_mesa_snorm_to_snorm(int x, unsigned src_bits, unsigned dst_bits)
{
if (x < -MAX_INT(src_bits))
return -MAX_INT(dst_bits);
else if (src_bits < dst_bits)
return EXTEND_NORMALIZED_INT(x, src_bits - 1, dst_bits - 1);
else
return x >> (src_bits - dst_bits);
}
static inline unsigned
_mesa_unsigned_to_unsigned(unsigned src, unsigned dst_size)
{
return MIN2(src, MAX_UINT(dst_size));
}
static inline int
_mesa_unsigned_to_signed(unsigned src, unsigned dst_size)
{
return MIN2(src, (unsigned)MAX_INT(dst_size));
}
static inline int
_mesa_signed_to_signed(int src, unsigned dst_size)
{
return CLAMP(src, MIN_INT(dst_size), MAX_INT(dst_size));
}
static inline unsigned
_mesa_signed_to_unsigned(int src, unsigned dst_size)
{
return CLAMP(src, 0, MAX_UINT(dst_size));
}
static inline unsigned
_mesa_float_to_unsigned(float src, unsigned dst_bits)
{
if (src < 0.0f)
return 0;
if (src > (float)MAX_UINT(dst_bits))
return MAX_UINT(dst_bits);
return _mesa_signed_to_unsigned(src, dst_bits);
}
static inline unsigned
_mesa_float_to_signed(float src, unsigned dst_bits)
{
if (src < (float)(-MAX_INT(dst_bits)))
return -MAX_INT(dst_bits);
if (src > (float)MAX_INT(dst_bits))
return MAX_INT(dst_bits);
return _mesa_signed_to_signed(src, dst_bits);
}
static inline unsigned
_mesa_half_to_unsigned(uint16_t src, unsigned dst_bits)
{
if (_mesa_half_is_negative(src))
return 0;
return _mesa_unsigned_to_unsigned(_mesa_float_to_half(src), dst_bits);
}
static inline unsigned
_mesa_half_to_signed(uint16_t src, unsigned dst_bits)
{
return _mesa_float_to_signed(_mesa_half_to_float(src), dst_bits);
}
bool
_mesa_format_to_array(mesa_format, GLenum *type, int *num_components,
uint8_t swizzle[4], bool *normalized);
void
_mesa_swizzle_and_convert(void *dst,
enum mesa_array_format_datatype dst_type,
int num_dst_channels,
const void *src,
enum mesa_array_format_datatype src_type,
int num_src_channels,
const uint8_t swizzle[4], bool normalized, int count);
bool
_mesa_compute_rgba2base2rgba_component_mapping(GLenum baseFormat, uint8_t *map);
void
_mesa_format_convert(void *void_dst, uint32_t dst_format, size_t dst_stride,
void *void_src, uint32_t src_format, size_t src_stride,
size_t width, size_t height, uint8_t *rebase_swizzle);
#endif
|
