diff options
Diffstat (limited to 'libskrift_srgb_preprocess.c')
| -rw-r--r-- | libskrift_srgb_preprocess.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/libskrift_srgb_preprocess.c b/libskrift_srgb_preprocess.c new file mode 100644 index 0000000..e290fc9 --- /dev/null +++ b/libskrift_srgb_preprocess.c @@ -0,0 +1,27 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" + +#define GAMMA(TYPE, POW) (t <= (TYPE)0.04045f ? t / (TYPE)12.92f : POW((t + (TYPE)0.055f) / (TYPE)1.055f, (TYPE)2.4f)) + +static const uint8_t gamma_u8[] = { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, + 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, + 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, + 8, 8, 8, 8, 9, 9, 9, 10, 10, 10, 11, 11, 12, 12, 12, 13, + 13, 13, 14, 14, 15, 15, 16, 16, 17, 17, 17, 18, 18, 19, 19, 20, + 20, 21, 22, 22, 23, 23, 24, 24, 25, 25, 26, 27, 27, 28, 29, 29, + 30, 30, 31, 32, 32, 33, 34, 35, 35, 36, 37, 37, 38, 39, 40, 41, + 41, 42, 43, 44, 45, 45, 46, 47, 48, 49, 50, 51, 51, 52, 53, 54, + 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, + 71, 72, 73, 74, 76, 77, 78, 79, 80, 81, 82, 84, 85, 86, 87, 88, + 90, 91, 92, 93, 95, 96, 97, 99, 100, 101, 103, 104, 105, 107, 108, 109, + 111, 112, 114, 115, 116, 118, 119, 121, 122, 124, 125, 127, 128, 130, 131, 133, + 134, 136, 138, 139, 141, 142, 144, 146, 147, 149, 151, 152, 154, 156, 157, 159, + 161, 163, 164, 166, 168, 170, 171, 173, 175, 177, 179, 181, 183, 184, 186, 188, + 190, 192, 194, 196, 198, 200, 202, 204, 206, 208, 210, 212, 214, 216, 218, 220, + 222, 224, 226, 229, 231, 233, 235, 237, 239, 242, 244, 246, 248, 250, 253, 255 +}; + +#define FUNCTION_NAME libskrift_srgb_preprocess + +#include "srgb-gamma.h" |