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polymost_invsqrt(), reorganize pthtyp for better member alignment 

git-svn-id: https://svn.eduke32.com/eduke32@4636 1a8010ca-5511-0410-912e-c29ae57300e0
This commit is contained in:
terminx 2014-09-30 04:17:37 +00:00
parent 0f5be25a68
commit ff74aa613e
1 changed files with 27 additions and 13 deletions
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40
polymer/eduke32/build/include/polymost.h
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@ -6,7 +6,7 @@
#include "glbuild.h"
#include "hightile.h"
typedef struct { char r, g, b, a; } coltype;
typedef struct { uint8_t r, g, b, a; } coltype;
extern int32_t rendmode;
extern float gtang;
@ -117,6 +117,19 @@ static inline int polymost_is_npotmode(void)
r_npotwallmode;
}
static inline float polymost_invsqrt(float x)
{
#ifdef B_LITTLE_ENDIAN
const float haf = x*.5f;
struct conv { union { uint32_t i; float f; } u; } * const n = (struct conv *)&x;
n->u.i = 0x5f3759df-(n->u.i>>1);
return n->u.f*(1.5f-haf*(n->u.f*n->u.f));
#else
// this is the comment
return 1.f/Bsqrtf(x);
#endif
}
// Flags of the <dameth> argument of various functions
enum {
DAMETH_CLAMPED = 4,
@ -128,7 +141,7 @@ enum {
};
// DAMETH_CLAMPED -> PTH_CLAMPED conversion
#define TO_PTH_CLAMPED(dameth) ((((dameth)&4))>>2)
#define TO_PTH_CLAMPED(dameth) (((dameth)&DAMETH_CLAMPED)>>2)
// Do we want a NPOT-y-as-classic texture for this <dameth> and <ysiz>?
static inline int polymost_want_npotytex(int32_t dameth, int32_t ysiz)
@ -152,18 +165,19 @@ enum {
typedef struct pthtyp_t
{
struct pthtyp_t *next;
uint32_t glpic;
int16_t picnum;
char palnum;
char shade;
char effects;
char flags; // 1 = clamped (dameth&4), 2 = hightile, 4 = skybox face, 8 = hasalpha, 16 = hasfullbright, 128 = invalidated
char skyface;
hicreplctyp *hicr;
struct pthtyp_t *ofb; // fullbright pixels
hicreplctyp *hicr;
uint16_t sizx, sizy;
float scalex, scaley;
struct pthtyp_t *ofb; // only fullbright
uint32_t glpic;
vec2f_t scale;
vec2_t siz;
int16_t picnum;
char palnum;
char shade;
char effects;
char flags; // 1 = clamped (dameth&4), 2 = hightile, 4 = skybox face, 8 = hasalpha, 16 = hasfullbright, 128 = invalidated
char skyface;
} pthtyp;
extern void gloadtile_art(int32_t,int32_t,int32_t,int32_t,pthtyp *,int32_t);