/*
* Mesa 3-D graphics library
- * Version: 5.1
+ * Version: 6.3
*
- * 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"),
#include "imports.h"
#include "context.h"
+#include "version.h"
#define MAXSTRING 4000 /* for vsnprintf() */
#ifdef WIN32
#define vsnprintf _vsnprintf
-#elif defined(__IBMC__) || defined(__IBMCPP__) || defined(VMS)
+#elif defined(__IBMC__) || defined(__IBMCPP__) || ( defined(__VMS) && __CRTL_VER < 70312000 )
extern int vsnprintf(char *str, size_t count, const char *fmt, va_list arg);
+#ifdef __VMS
+#include "vsnprintf.c"
+#endif
#endif
}
+/**
+ * Single precision square root.
+ */
float
_mesa_sqrtf( float x )
{
#elif defined(XFree86LOADER) && defined(IN_MODULE)
return 1.0F / xf86sqrt(n);
#else
- return 1.0F / sqrt(n);
+ return (float) (1.0 / sqrt(n));
#endif
}
-/** Wrapper around either pow() or xf86pow() */
+/**
+ * Wrapper around either pow() or xf86pow().
+ */
double
_mesa_pow(double x, double y)
{
}
-/*
+/**
* Return number of bits set in given GLuint.
*/
unsigned int
return bits;
}
+
+/**
+ * Convert a 4-byte float to a 2-byte half float.
+ * Based on code from:
+ * http://www.opengl.org/discussion_boards/ubb/Forum3/HTML/008786.html
+ */
+GLhalfARB
+_mesa_float_to_half(float val)
+{
+ const int flt = *((int *) (void *) &val);
+ const int flt_m = flt & 0x7fffff;
+ const int flt_e = (flt >> 23) & 0xff;
+ const int flt_s = (flt >> 31) & 0x1;
+ int s, e, m = 0;
+ GLhalfARB result;
+
+ /* sign bit */
+ s = flt_s;
+
+ /* handle special cases */
+ if ((flt_e == 0) && (flt_m == 0)) {
+ /* zero */
+ /* m = 0; - already set */
+ e = 0;
+ }
+ else if ((flt_e == 0) && (flt_m != 0)) {
+ /* denorm -- denorm float maps to 0 half */
+ /* m = 0; - already set */
+ e = 0;
+ }
+ else if ((flt_e == 0xff) && (flt_m == 0)) {
+ /* infinity */
+ /* m = 0; - already set */
+ e = 31;
+ }
+ else if ((flt_e == 0xff) && (flt_m != 0)) {
+ /* NaN */
+ m = 1;
+ e = 31;
+ }
+ else {
+ /* regular number */
+ const int new_exp = flt_e - 127;
+ if (new_exp < -24) {
+ /* this maps to 0 */
+ /* m = 0; - already set */
+ e = 0;
+ }
+ else if (new_exp < -14) {
+ /* this maps to a denorm */
+ unsigned int exp_val = (unsigned int) (-14 - new_exp); /* 2^-exp_val*/
+ e = 0;
+ switch (exp_val) {
+ case 0:
+ _mesa_warning(NULL,
+ "float_to_half: logical error in denorm creation!\n");
+ /* m = 0; - already set */
+ break;
+ case 1: m = 512 + (flt_m >> 14); break;
+ case 2: m = 256 + (flt_m >> 15); break;
+ case 3: m = 128 + (flt_m >> 16); break;
+ case 4: m = 64 + (flt_m >> 17); break;
+ case 5: m = 32 + (flt_m >> 18); break;
+ case 6: m = 16 + (flt_m >> 19); break;
+ case 7: m = 8 + (flt_m >> 20); break;
+ case 8: m = 4 + (flt_m >> 21); break;
+ case 9: m = 2 + (flt_m >> 22); break;
+ case 10: m = 1; break;
+ }
+ }
+ else if (new_exp > 15) {
+ /* map this value to infinity */
+ /* m = 0; - already set */
+ e = 31;
+ }
+ else {
+ /* regular */
+ e = new_exp + 15;
+ m = flt_m >> 13;
+ }
+ }
+
+ result = (s << 15) | (e << 10) | m;
+ return result;
+}
+
+
+/**
+ * Convert a 2-byte half float to a 4-byte float.
+ * Based on code from:
+ * http://www.opengl.org/discussion_boards/ubb/Forum3/HTML/008786.html
+ */
+float
+_mesa_half_to_float(GLhalfARB val)
+{
+ /* XXX could also use a 64K-entry lookup table */
+ const int m = val & 0x3ff;
+ const int e = (val >> 10) & 0x1f;
+ const int s = (val >> 15) & 0x1;
+ int flt_m, flt_e, flt_s, flt;
+ float result;
+
+ /* sign bit */
+ flt_s = s;
+
+ /* handle special cases */
+ if ((e == 0) && (m == 0)) {
+ /* zero */
+ flt_m = 0;
+ flt_e = 0;
+ }
+ else if ((e == 0) && (m != 0)) {
+ /* denorm -- denorm half will fit in non-denorm single */
+ const float half_denorm = 1.0f / 16384.0f; /* 2^-14 */
+ float mantissa = ((float) (m)) / 1024.0f;
+ float sign = s ? -1.0f : 1.0f;
+ return sign * mantissa * half_denorm;
+ }
+ else if ((e == 31) && (m == 0)) {
+ /* infinity */
+ flt_e = 0xff;
+ flt_m = 0;
+ }
+ else if ((e == 31) && (m != 0)) {
+ /* NaN */
+ flt_e = 0xff;
+ flt_m = 1;
+ }
+ else {
+ /* regular */
+ flt_e = e + 112;
+ flt_m = m << 13;
+ }
+
+ flt = (flt_s << 31) | (flt_e << 23) | flt_m;
+ result = *((float *) (void *) &flt);
+ return result;
+}
+
/*@}*/
/** \name Environment vars */
/*@{*/
-/** Wrapper around either () or xf86() */
+/**
+ * Wrapper for getenv().
+ */
char *
_mesa_getenv( const char *var )
{
va_end( args );
#if defined(XFree86LOADER) && defined(IN_MODULE)
- xf86fprintf(stderr, "Mesa implementation error: %s\n", str);
- xf86fprintf(stderr, "Please report to the DRI project at dri.sourceforge.net\n");
+ xf86fprintf(stderr, "Mesa %s implementation error: %s\n", MESA_VERSION_STRING, str);
+ xf86fprintf(stderr, "Please report at bugzilla.freedesktop.org\n");
#else
- fprintf(stderr, "Mesa implementation error: %s\n", str);
- fprintf(stderr, "Please report to the Mesa bug database at www.mesa3d.org\n" );
+ fprintf(stderr, "Mesa %s implementation error: %s\n", MESA_VERSION_STRING, str);
+ fprintf(stderr, "Please report at bugzilla.freedesktop.org\n");
#endif
}
errstr = "unknown";
break;
}
- _mesa_debug(ctx, "Mesa user error: %s in %s\n", errstr, where);
+ _mesa_debug(ctx, "User error: %s in %s\n", errstr, where);
}
_mesa_record_error(ctx, error);
{
char s[MAXSTRING];
va_list args;
+ (void) ctx;
va_start(args, fmtString);
vsnprintf(s, MAXSTRING, fmtString, args);
va_end(args);
{
int r;
va_list args;
+ (void) gc;
va_start( args, fmt );
r = vsprintf( str, fmt, args );
va_end( args );
static void * CAPI
default_fopen(__GLcontext *gc, const char *path, const char *mode)
{
+ (void) gc;
return fopen(path, mode);
}
static int CAPI
default_fclose(__GLcontext *gc, void *stream)
{
+ (void) gc;
return fclose((FILE *) stream);
}
{
int r;
va_list args;
+ (void) gc;
va_start( args, fmt );
r = vfprintf( (FILE *) stream, fmt, args );
va_end( args );
static __GLdrawablePrivate *
default_GetDrawablePrivate(__GLcontext *gc)
{
+ (void) gc;
return NULL;
}
projects / mesa.git / blobdiff