fxt1.c File Reference

#include <stdlib.h>
#include <string.h>
#include "types.h"
#include "internal.h"
#include "fxt1.h"

Go to the source code of this file.

Defines
#define	MAX_COMP   4 /* ever needed maximum number of components in texel */
#define	MAX_VECT   4 /* ever needed maximum number of base vectors to find */
#define	N_TEXELS   32 /* number of texels in a block (always 32) */
#define	LL_N_REP   50 /* number of iterations in lloyd's vq */
#define	LL_RMS_D   10 /* fault tolerance (maximum delta) */
#define	LL_RMS_E   255 /* fault tolerance (maximum error) */
#define	ALPHA_TS   2 /* alpha threshold: (255 - ALPHA_TS) deemed opaque */
#define	ISTBLACK(v)   (*((dword *)(v)) == 0)
#define	COPY_4UBV(DST, SRC)   *((dword *)(DST)) = *((dword *)(SRC))
#define	CC_SEL(cc, which)   (((dword *)(cc))[(which) / 32] >> ((which) & 31))
#define	UP5(c)   _rgb_scale_5[(c) & 31]
#define	UP6(c, b)   _rgb_scale_6[(((c) & 31) << 1) | ((b) & 1)]
#define	LERP(n, t, c0, c1)   (((n) - (t)) * (c0) + (t) * (c1) + (n) / 2) / (n)
#define	ZERO_4UBV(v)   *((dword *)(v)) = 0
Functions
static int	fxt1_bestcol (float vec[][MAX_COMP], int nv, byte input[MAX_COMP], int nc)
static int	fxt1_worst (float vec[MAX_COMP], byte input[N_TEXELS][MAX_COMP], int nc, int n)
static int	fxt1_variance (double variance[MAX_COMP], byte input[N_TEXELS][MAX_COMP], int nc, int n)
static int	fxt1_choose (float vec[][MAX_COMP], int nv, byte input[N_TEXELS][MAX_COMP], int nc, int n)
static int	fxt1_lloyd (float vec[][MAX_COMP], int nv, byte input[N_TEXELS][MAX_COMP], int nc, int n)
static void	fxt1_quantize_CHROMA (dword *cc, byte input[N_TEXELS][MAX_COMP])
static void	fxt1_quantize_ALPHA0 (dword *cc, byte input[N_TEXELS][MAX_COMP], byte reord[N_TEXELS][MAX_COMP], int n)
static void	fxt1_quantize_ALPHA1 (dword *cc, byte input[N_TEXELS][MAX_COMP])
static void	fxt1_quantize_HI (dword *cc, byte input[N_TEXELS][MAX_COMP], byte reord[N_TEXELS][MAX_COMP], int n)
static void	fxt1_quantize_MIXED1 (dword *cc, byte input[N_TEXELS][MAX_COMP])
static void	fxt1_quantize_MIXED0 (dword *cc, byte input[N_TEXELS][MAX_COMP])
static void	fxt1_quantize (dword *cc, const byte *lines[], int comps)
TAPI int TAPIENTRY	fxt1_encode (int width, int height, int comps, const void *source, int srcRowStride, void *dest, int destRowStride)
static void	fxt1_decode_1HI (const byte *code, int t, byte *rgba)
static void	fxt1_decode_1CHROMA (const byte *code, int t, byte *rgba)
static void	fxt1_decode_1MIXED (const byte *code, int t, byte *rgba)
static void	fxt1_decode_1ALPHA (const byte *code, int t, byte *rgba)
TAPI void TAPIENTRY	fxt1_decode_1 (const void *texture, int stride, int i, int j, byte *rgba)
Variables
static const byte	_rgb_scale_5 []
static const byte	_rgb_scale_6 []