diff options
Diffstat (limited to 'src/mesa')
| -rw-r--r-- | src/mesa/main/imports.h | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/src/mesa/main/imports.h b/src/mesa/main/imports.h index 0c0a291e164..5cdac06ba82 100644 --- a/src/mesa/main/imports.h +++ b/src/mesa/main/imports.h @@ -8,9 +8,9 @@ /* * Mesa 3-D graphics library - * Version: 5.1 + * Version: 6.0 * - * Copyright (C) 1999-2003 Brian Paul All Rights Reserved. + * Copyright (C) 1999-2004 Brian Paul 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"), @@ -510,8 +510,8 @@ static INLINE int iceil(float f) /*** - *** UNCLAMPED_FLOAT_TO_UBYTE: map float from {0,1} to ubyte in [0,255] - *** CLAMPED_FLOAT_TO_UBYTE: map float in [0,1] to ubyte in [0,255] + *** UNCLAMPED_FLOAT_TO_UBYTE: clamp float to [0,1] and map to ubyte in [0,255] + *** CLAMPED_FLOAT_TO_UBYTE: map float known to be in [0,1] to ubyte in [0,255] ***/ #if defined(USE_IEEE) && !defined(DEBUG) #define IEEE_0996 0x3f7f0000 /* 0.996 or so */ @@ -522,13 +522,21 @@ static INLINE int iceil(float f) do { \ fi_type __tmp; \ __tmp.f = (F); \ - UB = ((__tmp.i >= IEEE_0996) \ - ? ((GLint)__tmp.i < 0) ? (GLubyte)0 : (GLubyte)255 \ - : (__tmp.f = __tmp.f*(255.0F/256.0F) + 32768.0F, \ - (GLubyte)__tmp.i)); \ + if (__tmp.i < 0) \ + UB = (GLubyte) 0; \ + else if (__tmp.i >= IEEE_0996) \ + UB = (GLubyte) 255; \ + else { \ + __tmp.f = __tmp.f * (255.0F/256.0F) + 32768.0F; \ + UB = (GLubyte) __tmp.i; \ + } \ + } while (0) +#define CLAMPED_FLOAT_TO_UBYTE(UB, F) \ + do { \ + fi_type __tmp; \ + __tmp.f = (F) * (255.0F/256.0F) + 32768.0F; \ + UB = (GLubyte) __tmp.i; \ } while (0) -#define CLAMPED_FLOAT_TO_UBYTE(ub, f) \ - UNCLAMPED_FLOAT_TO_UBYTE(ub, f) #else #define UNCLAMPED_FLOAT_TO_UBYTE(ub, f) \ ub = ((GLubyte) IROUND(CLAMP((f), 0.0F, 1.0F) * 255.0F)) |