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wined3d: Move float_32_to_16() to surface_base.c which is the only place where it's used, and because it needs port.h for isinf().

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Francois Gouget 2008-07-10 00:23:07 +02:00 committed by Alexandre Julliard
parent 888cf5a4af
commit 8320d214d4
2 changed files with 53 additions and 49 deletions
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51
dlls/wined3d/surface_base.c
View File

@ -34,6 +34,57 @@
WINE_DEFAULT_DEBUG_CHANNEL(d3d_surface);
/* See also float_16_to_32() in wined3d_private.h */
static inline unsigned short float_32_to_16(const float *in)
{
int exp = 0;
float tmp = fabs(*in);
unsigned int mantissa;
unsigned short ret;
/* Deal with special numbers */
if(*in == 0.0) return 0x0000;
if(isnan(*in)) return 0x7C01;
if(isinf(*in)) return (*in < 0.0 ? 0xFC00 : 0x7c00);
if(tmp < pow(2, 10)) {
do
{
tmp = tmp * 2.0;
exp--;
}while(tmp < pow(2, 10));
} else if(tmp >= pow(2, 11)) {
do
{
tmp /= 2.0;
exp++;
}while(tmp >= pow(2, 11));
}
mantissa = (unsigned int) tmp;
if(tmp - mantissa >= 0.5) mantissa++; /* round to nearest, away from zero */
exp += 10; /* Normalize the mantissa */
exp += 15; /* Exponent is encoded with excess 15 */
if(exp > 30) { /* too big */
ret = 0x7c00; /* INF */
} else if(exp <= 0) {
/* exp == 0: Non-normalized mantissa. Returns 0x0000 (=0.0) for too small numbers */
while(exp <= 0) {
mantissa = mantissa >> 1;
exp++;
}
ret = mantissa & 0x3ff;
} else {
ret = (exp << 10) | (mantissa & 0x3ff);
}
ret |= ((*in < 0.0 ? 1 : 0) << 15); /* Add the sign */
return ret;
}
/* Do NOT define GLINFO_LOCATION in this file. THIS CODE MUST NOT USE IT */
/* *******************************************

51
dlls/wined3d/wined3d_private.h
View File

@ -126,7 +126,8 @@ void init_type_lookup(WineD3D_GL_Info *gl_info);
#define WINED3D_ATR_NORMALIZED(type) GLINFO_LOCATION.glTypeLookup[type].normalized
#define WINED3D_ATR_TYPESIZE(type) GLINFO_LOCATION.glTypeLookup[type].typesize
/* The following functions convert 16 bit floats in the FLOAT16 data type
/* float_16_to_32() and float_32_to_16() (see implementation in
* surface_base.c) convert 16 bit floats in the FLOAT16 data type
* to standard C floats and vice versa. They do not depend on the encoding
* of the C float, so they are platform independent, but slow. On x86 and
* other IEEE 754 compliant platforms the conversion can be accelerated by
@ -152,54 +153,6 @@ static inline float float_16_to_32(const unsigned short *in) {
}
}
static inline unsigned short float_32_to_16(const float *in) {
int exp = 0;
float tmp = fabs(*in);
unsigned int mantissa;
unsigned short ret;
/* Deal with special numbers */
if(*in == 0.0) return 0x0000;
if(isnan(*in)) return 0x7C01;
if(isinf(*in)) return (*in < 0.0 ? 0xFC00 : 0x7c00);
if(tmp < pow(2, 10)) {
do
{
tmp = tmp * 2.0;
exp--;
}while(tmp < pow(2, 10));
} else if(tmp >= pow(2, 11)) {
do
{
tmp /= 2.0;
exp++;
}while(tmp >= pow(2, 11));
}
mantissa = (unsigned int) tmp;
if(tmp - mantissa >= 0.5) mantissa++; /* round to nearest, away from zero */
exp += 10; /* Normalize the mantissa */
exp += 15; /* Exponent is encoded with excess 15 */
if(exp > 30) { /* too big */
ret = 0x7c00; /* INF */
} else if(exp <= 0) {
/* exp == 0: Non-normalized mantissa. Returns 0x0000 (=0.0) for too small numbers */
while(exp <= 0) {
mantissa = mantissa >> 1;
exp++;
}
ret = mantissa & 0x3ff;
} else {
ret = (exp << 10) | (mantissa & 0x3ff);
}
ret |= ((*in < 0.0 ? 1 : 0) << 15); /* Add the sign */
return ret;
}
/**
* Settings
*/