diff options
| author | Brian Paul <brian.paul@tungstengraphics.com> | 2004-02-17 04:24:52 +0000 |
|---|---|---|
| committer | Brian Paul <brian.paul@tungstengraphics.com> | 2004-02-17 04:24:52 +0000 |
| commit | c2f6d6d092cb769416af453a9b8e216b20747bec (patch) | |
| tree | 5783e10cc525d46c7d94da21bbfed5d26bf1eeb5 /src/mesa/main | |
| parent | 84b4a3a087a1475d4e9bd713e4bae91ba6363a50 (diff) | |
added FixedToDouble() macro
Diffstat (limited to 'src/mesa/main')
| -rw-r--r-- | src/mesa/main/mtypes.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h index 37fb9a2408..a8f0edba8b 100644 --- a/src/mesa/main/mtypes.h +++ b/src/mesa/main/mtypes.h @@ -108,7 +108,9 @@ typedef int GLfixed; /* * Fixed point arithmetic macros */ +#ifndef FIXED_FRAC_BITS #define FIXED_FRAC_BITS 11 +#endif #define FIXED_SHIFT FIXED_FRAC_BITS #define FIXED_ONE (1 << FIXED_SHIFT) @@ -117,7 +119,9 @@ typedef int GLfixed; #define FIXED_INT_MASK (~FIXED_FRAC_MASK) #define FIXED_EPSILON 1 #define FIXED_SCALE ((float) FIXED_ONE) +#define FIXED_DBL_SCALE ((double) FIXED_ONE) #define FloatToFixed(X) (IROUND((X) * FIXED_SCALE)) +#define FixedToDouble(X) ((X) * (1.0 / FIXED_DBL_SCALE)) #define IntToFixed(I) ((I) << FIXED_SHIFT) #define FixedToInt(X) ((X) >> FIXED_SHIFT) #define FixedToUns(X) (((unsigned int)(X)) >> FIXED_SHIFT) |