/*
* 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"),
return r;
}
#define IROUND(x) iround(x)
-#elif defined(USE_X86_ASM) && defined(__WATCOMC__)
+#elif defined(__WATCOMC__) && defined(__386__)
long iround(float f);
-#pragma aux iround = \
+#pragma aux iround = \
"push eax" \
"fistp dword ptr [esp]" \
"pop eax" \
value [eax] \
modify exact [eax];
#define IROUND(x) iround(x)
-#elif defined(__OS2__)
-#ifndef FIST_MAGIC
-#define FIST_MAGIC ((((65536.0 * 65536.0 * 16)+(65536.0 * 0.5))* 65536.0))
-#endif
-static INLINE int iround(float x)
-{
- double dtemp = FIST_MAGIC + x;
- return ((*(int *)&dtemp) - 0x80000000);
-}
-#define IROUND(f) iround((float)f)
#else
#define IROUND(f) ((int) (((f) >= 0.0F) ? ((f) + 0.5F) : ((f) - 0.5F)))
#endif
/***
- *** 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 */
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))
extern unsigned int
_mesa_bitcount(unsigned int n);
+extern GLhalfNV
+_mesa_float_to_half(float f);
+
+extern float
+_mesa_half_to_float(GLhalfNV h);
+
extern char *
_mesa_getenv( const char *var );