Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5564 | serge | 1 | /** |
| 2 | * \file format_utils.h |
||
| 3 | * A collection of format conversion utility functions. |
||
| 4 | */ |
||
| 5 | |||
| 6 | /* |
||
| 7 | * Mesa 3-D graphics library |
||
| 8 | * |
||
| 9 | * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. |
||
| 10 | * Copyright (C) 2014 Intel Corporation All Rights Reserved. |
||
| 11 | * |
||
| 12 | * Permission is hereby granted, free of charge, to any person obtaining a |
||
| 13 | * copy of this software and associated documentation files (the "Software"), |
||
| 14 | * to deal in the Software without restriction, including without limitation |
||
| 15 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
||
| 16 | * and/or sell copies of the Software, and to permit persons to whom the |
||
| 17 | * Software is furnished to do so, subject to the following conditions: |
||
| 18 | * |
||
| 19 | * The above copyright notice and this permission notice shall be included |
||
| 20 | * in all copies or substantial portions of the Software. |
||
| 21 | * |
||
| 22 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
||
| 23 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
||
| 24 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
||
| 25 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
||
| 26 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
||
| 27 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
||
| 28 | * OTHER DEALINGS IN THE SOFTWARE. |
||
| 29 | */ |
||
| 30 | |||
| 31 | #ifndef FORMAT_UTILS_H |
||
| 32 | #define FORMAT_UTILS_H |
||
| 33 | |||
| 34 | #include "imports.h" |
||
| 35 | #include "macros.h" |
||
| 36 | |||
| 37 | extern const mesa_array_format RGBA32_FLOAT; |
||
| 38 | extern const mesa_array_format RGBA8_UBYTE; |
||
| 39 | extern const mesa_array_format RGBA32_UINT; |
||
| 40 | extern const mesa_array_format RGBA32_INT; |
||
| 41 | |||
| 42 | /* Only guaranteed to work for BITS <= 32 */ |
||
| 43 | #define MAX_UINT(BITS) ((BITS) == 32 ? UINT32_MAX : ((1u << (BITS)) - 1)) |
||
| 44 | #define MAX_INT(BITS) ((int)MAX_UINT((BITS) - 1)) |
||
| 45 | #define MIN_INT(BITS) ((BITS) == 32 ? INT32_MIN : (-(1 << (BITS - 1)))) |
||
| 46 | |||
| 47 | /* Extends an integer of size SRC_BITS to one of size DST_BITS linearly */ |
||
| 48 | #define EXTEND_NORMALIZED_INT(X, SRC_BITS, DST_BITS) \ |
||
| 49 | (((X) * (int)(MAX_UINT(DST_BITS) / MAX_UINT(SRC_BITS))) + \ |
||
| 50 | ((DST_BITS % SRC_BITS) ? ((X) >> (SRC_BITS - DST_BITS % SRC_BITS)) : 0)) |
||
| 51 | |||
| 52 | static inline float |
||
| 53 | _mesa_unorm_to_float(unsigned x, unsigned src_bits) |
||
| 54 | { |
||
| 55 | return x * (1.0f / (float)MAX_UINT(src_bits)); |
||
| 56 | } |
||
| 57 | |||
| 58 | static inline float |
||
| 59 | _mesa_snorm_to_float(int x, unsigned src_bits) |
||
| 60 | { |
||
| 61 | if (x <= -MAX_INT(src_bits)) |
||
| 62 | return -1.0f; |
||
| 63 | else |
||
| 64 | return x * (1.0f / (float)MAX_INT(src_bits)); |
||
| 65 | } |
||
| 66 | |||
| 67 | static inline uint16_t |
||
| 68 | _mesa_unorm_to_half(unsigned x, unsigned src_bits) |
||
| 69 | { |
||
| 70 | return _mesa_float_to_half(_mesa_unorm_to_float(x, src_bits)); |
||
| 71 | } |
||
| 72 | |||
| 73 | static inline uint16_t |
||
| 74 | _mesa_snorm_to_half(int x, unsigned src_bits) |
||
| 75 | { |
||
| 76 | return _mesa_float_to_half(_mesa_snorm_to_float(x, src_bits)); |
||
| 77 | } |
||
| 78 | |||
| 79 | static inline unsigned |
||
| 80 | _mesa_float_to_unorm(float x, unsigned dst_bits) |
||
| 81 | { |
||
| 82 | if (x < 0.0f) |
||
| 83 | return 0; |
||
| 84 | else if (x > 1.0f) |
||
| 85 | return MAX_UINT(dst_bits); |
||
| 86 | else |
||
| 87 | return F_TO_I(x * MAX_UINT(dst_bits)); |
||
| 88 | } |
||
| 89 | |||
| 90 | static inline unsigned |
||
| 91 | _mesa_half_to_unorm(uint16_t x, unsigned dst_bits) |
||
| 92 | { |
||
| 93 | return _mesa_float_to_unorm(_mesa_half_to_float(x), dst_bits); |
||
| 94 | } |
||
| 95 | |||
| 96 | static inline unsigned |
||
| 97 | _mesa_unorm_to_unorm(unsigned x, unsigned src_bits, unsigned dst_bits) |
||
| 98 | { |
||
| 99 | if (src_bits < dst_bits) { |
||
| 100 | return EXTEND_NORMALIZED_INT(x, src_bits, dst_bits); |
||
| 101 | } else { |
||
| 102 | unsigned src_half = (1 << (src_bits - 1)) - 1; |
||
| 103 | |||
| 104 | if (src_bits + dst_bits > sizeof(x) * 8) { |
||
| 105 | assert(src_bits + dst_bits <= sizeof(uint64_t) * 8); |
||
| 106 | return (((uint64_t) x * MAX_UINT(dst_bits) + src_half) / |
||
| 107 | MAX_UINT(src_bits)); |
||
| 108 | } else { |
||
| 109 | return (x * MAX_UINT(dst_bits) + src_half) / MAX_UINT(src_bits); |
||
| 110 | } |
||
| 111 | } |
||
| 112 | } |
||
| 113 | |||
| 114 | static inline unsigned |
||
| 115 | _mesa_snorm_to_unorm(int x, unsigned src_bits, unsigned dst_bits) |
||
| 116 | { |
||
| 117 | if (x < 0) |
||
| 118 | return 0; |
||
| 119 | else |
||
| 120 | return _mesa_unorm_to_unorm(x, src_bits - 1, dst_bits); |
||
| 121 | } |
||
| 122 | |||
| 123 | static inline int |
||
| 124 | _mesa_float_to_snorm(float x, unsigned dst_bits) |
||
| 125 | { |
||
| 126 | if (x < -1.0f) |
||
| 127 | return -MAX_INT(dst_bits); |
||
| 128 | else if (x > 1.0f) |
||
| 129 | return MAX_INT(dst_bits); |
||
| 130 | else |
||
| 131 | return F_TO_I(x * MAX_INT(dst_bits)); |
||
| 132 | } |
||
| 133 | |||
| 134 | static inline int |
||
| 135 | _mesa_half_to_snorm(uint16_t x, unsigned dst_bits) |
||
| 136 | { |
||
| 137 | return _mesa_float_to_snorm(_mesa_half_to_float(x), dst_bits); |
||
| 138 | } |
||
| 139 | |||
| 140 | static inline int |
||
| 141 | _mesa_unorm_to_snorm(unsigned x, unsigned src_bits, unsigned dst_bits) |
||
| 142 | { |
||
| 143 | return _mesa_unorm_to_unorm(x, src_bits, dst_bits - 1); |
||
| 144 | } |
||
| 145 | |||
| 146 | static inline int |
||
| 147 | _mesa_snorm_to_snorm(int x, unsigned src_bits, unsigned dst_bits) |
||
| 148 | { |
||
| 149 | if (x < -MAX_INT(src_bits)) |
||
| 150 | return -MAX_INT(dst_bits); |
||
| 151 | else if (src_bits < dst_bits) |
||
| 152 | return EXTEND_NORMALIZED_INT(x, src_bits - 1, dst_bits - 1); |
||
| 153 | else |
||
| 154 | return x >> (src_bits - dst_bits); |
||
| 155 | } |
||
| 156 | |||
| 157 | static inline unsigned |
||
| 158 | _mesa_unsigned_to_unsigned(unsigned src, unsigned dst_size) |
||
| 159 | { |
||
| 160 | return MIN2(src, MAX_UINT(dst_size)); |
||
| 161 | } |
||
| 162 | |||
| 163 | static inline int |
||
| 164 | _mesa_unsigned_to_signed(unsigned src, unsigned dst_size) |
||
| 165 | { |
||
| 166 | return MIN2(src, (unsigned)MAX_INT(dst_size)); |
||
| 167 | } |
||
| 168 | |||
| 169 | static inline int |
||
| 170 | _mesa_signed_to_signed(int src, unsigned dst_size) |
||
| 171 | { |
||
| 172 | return CLAMP(src, MIN_INT(dst_size), MAX_INT(dst_size)); |
||
| 173 | } |
||
| 174 | |||
| 175 | static inline unsigned |
||
| 176 | _mesa_signed_to_unsigned(int src, unsigned dst_size) |
||
| 177 | { |
||
| 178 | return CLAMP(src, 0, MAX_UINT(dst_size)); |
||
| 179 | } |
||
| 180 | |||
| 181 | static inline unsigned |
||
| 182 | _mesa_float_to_unsigned(float src, unsigned dst_bits) |
||
| 183 | { |
||
| 184 | if (src < 0.0f) |
||
| 185 | return 0; |
||
| 186 | if (src > (float)MAX_UINT(dst_bits)) |
||
| 187 | return MAX_UINT(dst_bits); |
||
| 188 | return _mesa_signed_to_unsigned(src, dst_bits); |
||
| 189 | } |
||
| 190 | |||
| 191 | static inline unsigned |
||
| 192 | _mesa_float_to_signed(float src, unsigned dst_bits) |
||
| 193 | { |
||
| 194 | if (src < (float)(-MAX_INT(dst_bits))) |
||
| 195 | return -MAX_INT(dst_bits); |
||
| 196 | if (src > (float)MAX_INT(dst_bits)) |
||
| 197 | return MAX_INT(dst_bits); |
||
| 198 | return _mesa_signed_to_signed(src, dst_bits); |
||
| 199 | } |
||
| 200 | |||
| 201 | static inline unsigned |
||
| 202 | _mesa_half_to_unsigned(uint16_t src, unsigned dst_bits) |
||
| 203 | { |
||
| 204 | if (_mesa_half_is_negative(src)) |
||
| 205 | return 0; |
||
| 206 | return _mesa_unsigned_to_unsigned(_mesa_float_to_half(src), dst_bits); |
||
| 207 | } |
||
| 208 | |||
| 209 | static inline unsigned |
||
| 210 | _mesa_half_to_signed(uint16_t src, unsigned dst_bits) |
||
| 211 | { |
||
| 212 | return _mesa_float_to_signed(_mesa_half_to_float(src), dst_bits); |
||
| 213 | } |
||
| 214 | |||
| 215 | bool |
||
| 216 | _mesa_format_to_array(mesa_format, GLenum *type, int *num_components, |
||
| 217 | uint8_t swizzle[4], bool *normalized); |
||
| 218 | |||
| 219 | void |
||
| 220 | _mesa_swizzle_and_convert(void *dst, |
||
| 221 | enum mesa_array_format_datatype dst_type, |
||
| 222 | int num_dst_channels, |
||
| 223 | const void *src, |
||
| 224 | enum mesa_array_format_datatype src_type, |
||
| 225 | int num_src_channels, |
||
| 226 | const uint8_t swizzle[4], bool normalized, int count); |
||
| 227 | |||
| 228 | bool |
||
| 229 | _mesa_compute_rgba2base2rgba_component_mapping(GLenum baseFormat, uint8_t *map); |
||
| 230 | |||
| 231 | void |
||
| 232 | _mesa_format_convert(void *void_dst, uint32_t dst_format, size_t dst_stride, |
||
| 233 | void *void_src, uint32_t src_format, size_t src_stride, |
||
| 234 | size_t width, size_t height, uint8_t *rebase_swizzle); |
||
| 235 | |||
| 236 | #endif |