diff options
| author | Brian Paul <brian.paul@tungstengraphics.com> | 2004-02-08 00:37:32 +0000 |
|---|---|---|
| committer | Brian Paul <brian.paul@tungstengraphics.com> | 2004-02-08 00:37:32 +0000 |
| commit | 08a45d4d4f01100d3c99d1c8fc4b7db1242b78ef (patch) | |
| tree | 64f168fb240c0ae1edd36453b72dd1995f546c6d /src | |
| parent | 875f763c9fbe00661335e6b252aa3740101ea8d0 (diff) | |
fully parameterize the macros for fixed-point arithmetic
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/main/mtypes.h | 20 |
1 files changed, 7 insertions, 13 deletions
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h index 5ed79424d5..37fb9a2408 100644 --- a/src/mesa/main/mtypes.h +++ b/src/mesa/main/mtypes.h @@ -108,21 +108,15 @@ typedef int GLfixed; /* * Fixed point arithmetic macros */ -#ifdef FIXED_14 -#define FIXED_ONE 0x00004000 -#define FIXED_HALF 0x00002000 -#define FIXED_FRAC_MASK 0x00003FFF -#define FIXED_SCALE 16384.0f -#define FIXED_SHIFT 14 -#else -#define FIXED_ONE 0x00000800 -#define FIXED_HALF 0x00000400 -#define FIXED_FRAC_MASK 0x000007FF -#define FIXED_SCALE 2048.0f -#define FIXED_SHIFT 11 -#endif +#define FIXED_FRAC_BITS 11 + +#define FIXED_SHIFT FIXED_FRAC_BITS +#define FIXED_ONE (1 << FIXED_SHIFT) +#define FIXED_HALF (1 << (FIXED_SHIFT-1)) +#define FIXED_FRAC_MASK (FIXED_ONE - 1) #define FIXED_INT_MASK (~FIXED_FRAC_MASK) #define FIXED_EPSILON 1 +#define FIXED_SCALE ((float) FIXED_ONE) #define FloatToFixed(X) (IROUND((X) * FIXED_SCALE)) #define IntToFixed(I) ((I) << FIXED_SHIFT) #define FixedToInt(X) ((X) >> FIXED_SHIFT) |