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#define COLORTYPE unsigned char
typedef struct { unsigned char r,g,b; } rgb_group;
struct image
{
rgb_group *img;
INT32 xsize,ysize;
};
static unsigned char swap_bits[256] =
{ 0,128,64,192,32,160,96,224,16,144,80,208,48,176,112,
240,8,136,72,200,40,168,104,232,24,152,88,216,56,184,
120,248,4,132,68,196,36,164,100,228,20,148,84,212,52,
180,116,244,12,140,76,204,44,172,108,236,28,156,92,220,
60,188,124,252,2,130,66,194,34,162,98,226,18,146,82,
210,50,178,114,242,10,138,74,202,42,170,106,234,26,154,
90,218,58,186,122,250,6,134,70,198,38,166,102,230,22,
150,86,214,54,182,118,246,14,142,78,206,46,174,110,238,
30,158,94,222,62,190,126,254,1,129,65,193,33,161,97,
225,17,145,81,209,49,177,113,241,9,137,73,201,41,169,
105,233,25,153,89,217,57,185,121,249,5,133,69,197,37,
165,101,229,21,149,85,213,53,181,117,245,13,141,77,205,
45,173,109,237,29,157,93,221,61,189,125,253,3,131,67,
195,35,163,99,227,19,147,83,211,51,179,115,243,11,139,
75,203,43,171,107,235,27,155,91,219,59,187,123,251,7,
135,71,199,39,167,103,231,23,151,87,215,55,183,119,247,
15,143,79,207,47,175,111,239,31,159,95,223,63,191,127,255};
static void encode_truecolor_24_rgb_swapped( rgb_group *s,
unsigned char *d,
int q, int w )
{
while(q--)
{
*(d++) = s->b;
*(d++) = s->g;
*(d++) = (s++)->r;
}
}
static void encode_truecolor_24_rgb( rgb_group *s,
unsigned char *d,
int q, int w )
{
MEMCPY(d,(unsigned char *)s,q);
}
static void encode_truecolor_24_rgb_al32_swapped( rgb_group *s,
unsigned char *d,
int q, int w )
{
int l;
while(q)
{
l=w;
while(l--)
{
*(d++) = s->b;
*(d++) = s->g;
*(d++) = (s++)->r;
q--;
}
d += (w*3)&3;
}
}
static void encode_truecolor_24_rgb_al32( rgb_group *s,
unsigned char *d,
int q, int w )
{
int l;
while(q)
{
for(l=0; l<(q/w)/3; l++)
{
MEMCPY(d,(unsigned char *)s,w*3);
d += (w*3)&3;
}
}
}
#define encode_truecolor_24_bgr encode_truecolor_24_rgb_swapped
#define encode_truecolor_24_bgr_swapped encode_truecolor_24_rgb
#define encode_truecolor_24_bgr_al32 encode_truecolor_24_rgb_al32_swapped
#define encode_truecolor_24_bgr_al32_swapped encode_truecolor_24_rgb_al32
static void encode_truecolor_32_argb_swapped( rgb_group *s,
unsigned char *d,
int q,int w )
{
while(q--)
{
*(d++) = s->b;
*(d++) = s->g;
*(d++) = (s++)->r;
*(d++) = 0;
}
}
static void encode_truecolor_32_argb( rgb_group *s,
unsigned char *d,
int q,int w )
{
while(q--)
{
*(d++) = 0;
*(d++) = s->r;
*(d++) = s->g;
*(d++) = (s++)->b;
}
}
static void encode_truecolor_32_abgr( rgb_group *s,
unsigned char *d,
int q,int w )
{
while(q--)
{
*(d++) = 0;
*(d++) = s->b;
*(d++) = s->g;
*(d++) = (s++)->r;
}
}
static void encode_truecolor_32_abgr_swapped( rgb_group *s,
unsigned char *d,
int q,int w )
{
while(q--)
{
*(d++) = s->r;
*(d++) = s->g;
*(d++) = (s++)->b;
*(d++) = 0;
}
}
#define ENCODE_8(X,Y,Z) \
static void encode_truecolor_##X##_##Y( rgb_group *s, unsigned char *d, int q,int w ) \
{ \
while(q--) \
*(d++)=(Z); \
} \
\
static void encode_truecolor_##X##_##Y##_swapped( rgb_group *s, unsigned char *d, int q ,int w) \
{ \
while(q--) \
*(d++)=(Z); \
}
#define ENCODE_16(X,Y,Z) \
static void encode_truecolor_##X##_##Y( rgb_group *s, unsigned char *d, int q,int w ) \
{ \
while(q--) \
{ \
unsigned short v = (Z); \
*(d++)=v>>8; \
*(d++)=v&255; \
} \
} \
\
static void encode_truecolor_##X##_##Y##_swapped( rgb_group *s, unsigned char *d, int q ,int w) \
{ \
while(q--) \
{ \
unsigned short v = (Z); \
*(d++)=v&255; \
*(d++)=v>>8; \
} \
}
ENCODE_16(565,rgb,((s->r>>3)<<11) | (s->g>>2)<<5 | ((s++)->b>>3));
ENCODE_16(565,bgr,((s->b>>3)<<11) | (s->g>>2)<<5 | ((s++)->r>>3));
ENCODE_16(555,rgb,((s->r>>3)<<10) | (s->g>>3)<<5 | ((s++)->b>>3));
ENCODE_16(555,bgr,((s->b>>3)<<10) | (s->g>>3)<<5 | ((s++)->r>>3));
ENCODE_8(232,rgb,((s->r>>6)<<5) | (s->g>>5)<<2 | ((s++)->b>>6));
ENCODE_8(332,rgb,((s->r>>5)<<5) | (s->g>>5)<<2 | ((s++)->b>>6));
ENCODE_8(242,rgb,((s->r>>5)<<6) | (s->g>>4)<<2 | ((s++)->b>>6));
ENCODE_8(233,rgb,((s->r>>5)<<6) | (s->g>>4)<<3 | ((s++)->b>>5));
ENCODE_8(232,bgr,((s->b>>6)<<5) | (s->g>>5)<<2 | ((s++)->r>>6));
ENCODE_8(332,bgr,((s->b>>5)<<5) | (s->g>>5)<<2 | ((s++)->r>>6));
ENCODE_8(242,bgr,((s->b>>5)<<6) | (s->g>>4)<<2 | ((s++)->r>>6));
ENCODE_8(233,bgr,((s->b>>5)<<6) | (s->g>>4)<<3 | ((s++)->r>>5));
static void encode_truecolor_generic(int rbits, int rshift, int gbits,
int gshift, int bbits, int bshift,
int bpp, int alignbits,int swap_bytes,
struct image *img, unsigned char *dest,
int len)
{
unsigned char *d = dest;
INT32 x,y;
rgb_group *s;
s=img->img;
if(!alignbits) alignbits=1;
#define OPTIMIZE(rb,rs,gb,gs,bb,bs,al,fun) if(rbits==rb&&rshift==rs&&gbits==gb&&gshift==gs&&bbits==bb&&bshift==bs&&alignbits==al) {DEBUG_PF(("Optimized case %s%s\n",#fun,swap_bytes?"_swapped":""));return (swap_bytes?fun##_swapped(s,(void *)dest,img->xsize*img->ysize,img->xsize):fun(s,(void *)dest,img->xsize*img->ysize,img->xsize));}
switch(bpp)
{
case 32: /* 4 alternatives */
OPTIMIZE(8,16,8,8,8,0,1,encode_truecolor_32_argb);
OPTIMIZE(8,0,8,8,8,16,1,encode_truecolor_32_abgr);
break;
case 24: /* 8 alternatives */
OPTIMIZE(8,16,8,8,8,0,32,encode_truecolor_24_rgb_al32);
OPTIMIZE(8,0,8,8,8,16,32,encode_truecolor_24_bgr_al32);
OPTIMIZE(8,16,8,8,8,0,1,encode_truecolor_24_rgb);
OPTIMIZE(8,0,8,8,8,16,1,encode_truecolor_24_bgr);
break;
case 16: /* 8 alternatives */
OPTIMIZE(5,11,6,5,5,0,1,encode_truecolor_565_rgb);
OPTIMIZE(5,10,5,5,5,0,1,encode_truecolor_555_rgb);
OPTIMIZE(5,0,6,5,5,11,1,encode_truecolor_565_bgr);
OPTIMIZE(5,0,5,5,5,10,1,encode_truecolor_555_bgr);
break;
case 8: /* 16 alternatives */
OPTIMIZE(2,5,3,2,2,0,1,encode_truecolor_232_rgb);
OPTIMIZE(3,5,3,2,2,0,1,encode_truecolor_332_rgb);
OPTIMIZE(2,6,4,2,2,0,1,encode_truecolor_242_rgb);
OPTIMIZE(2,6,3,3,3,0,1,encode_truecolor_233_rgb);
OPTIMIZE(2,0,3,2,2,5,1,encode_truecolor_232_bgr);
OPTIMIZE(3,0,3,2,2,5,1,encode_truecolor_332_bgr);
OPTIMIZE(2,0,4,2,2,6,1,encode_truecolor_242_bgr);
OPTIMIZE(2,0,3,3,3,6,1,encode_truecolor_233_bgr);
break;
}
#undef OPTIMIZE
DEBUG_PF(("Generic encode_truecolor for r%dxg%dxb%d (%d bpp, shift=r%d,g%d,b%d)\n",
rbits,gbits,bbits,bpp,rshift,gshift,bshift));
{
INT32 rfmask,gfmask,bfmask;
INT32 rfshift,gfshift,bfshift,rzshift,gzshift,bzshift;
INT32 bpshift,blinemod,bit;
*d=0;
rfshift=rshift-(sizeof(COLORTYPE)*8-rbits);
gfshift=gshift-(sizeof(COLORTYPE)*8-gbits);
bfshift=bshift-(sizeof(COLORTYPE)*8-bbits);
if (rfshift<0) rzshift=-rfshift,rfshift=0; else rzshift=0;
if (gfshift<0) gzshift=-gfshift,gfshift=0; else gzshift=0;
if (bfshift<0) bzshift=-bfshift,bfshift=0; else bzshift=0;
rfmask=(((1<<rbits)-1)<<(sizeof(COLORTYPE)*8-rbits));
gfmask=(((1<<gbits)-1)<<(sizeof(COLORTYPE)*8-gbits));
bfmask=(((1<<bbits)-1)<<(sizeof(COLORTYPE)*8-bbits));
bpshift=sizeof(unsigned long)*8-bpp;
blinemod=alignbits-( (img->xsize*bpp+alignbits-1) % alignbits)-1;
bit=0;
y = img->ysize;
while (y--)
{
INT32 bp;
x=img->xsize;
while (x--)
{
register unsigned long b =
((((s->r&rfmask)>>rzshift)<<rfshift)|
(((s->g&gfmask)>>gzshift)<<gfshift)|
(((s->b&bfmask)>>bzshift)<<bfshift))<<bpshift;
bp = bpp;
while (bp>8-bit)
{
*d|=(unsigned char)(b>>(24+bit));
b<<=8-bit;
bp-=8-bit;
*(++d)=0; bit=0;
}
*d|=b>>(24+bit);
bit+=bp;
if (bit==8) *(++d)=0,bit=0;
s++;
}
bp=blinemod;
while (bp>8-bit) *(++d)=0,bp-=8-bit,bit=0;
bit+=bp;
if (bit==8) *(++d)=0,bit=0;
}
}
if (swap_bytes)
{
d=dest;
x=len;
switch (bpp)
{
case 32:
while (x>=4)
{
d[0]^=d[3],d[3]^=d[0],d[0]^=d[3];
d[1]^=d[2],d[2]^=d[1],d[1]^=d[2];
d+=4;
x-=4;
}
break;
case 24:
while (x>=3)
{
d[0]^=d[2],d[2]^=d[0],d[0]^=d[2];
d+=3;
x-=3;
}
break;
case 16:
while (x>=2)
{
d[0]^=d[1],d[1]^=d[0],d[0]^=d[1];
d+=2;
x-=2;
}
break;
case 1:
while (x--) *(d++)=swap_bits[*d];
break;
}
}
}
static INLINE void examine_mask(unsigned int x, int *bits,int *shift)
{
*bits=0;
*shift=0;
if (!x) return;
while (!(x&1)) x>>=1,(*shift)++;
while (x&1) x>>=1,(*bits)++;
}
void pgtk_encode_grey(struct image *i, unsigned char *dest, int bpp, int bpl )
{
int x, y;
rgb_group *s = i->img;
switch(bpp)
{
case 1:
for(y=0; y<i->ysize; y++)
{
unsigned char *d = dest+y*bpl;
for(x=0; x<i->xsize; x++)
*d = (s->r + s->g*2 + (s++)->b)>>2;
}
return;
case 2:
for(y=0; y<i->ysize; y++)
{
unsigned short *d = (unsigned short *)(dest+y*bpl);
for(x=0; x<i->xsize; x++)
*d = (s->r + s->g*2 + (s++)->b)<<6;
}
return;
default:
error("This greyscale is to wide for me!\n");
}
}
void pgtk_encode_truecolor_masks(struct image *i,
int bitspp,
int pad,
int byteorder,
unsigned int red_mask,
unsigned int green_mask,
unsigned int blue_mask,
unsigned char *buffer,
int debug_len)
{
int rbits,rshift,gbits,gshift,bbits,bshift;
examine_mask(red_mask,&rbits,&rshift);
examine_mask(green_mask,&gbits,&gshift);
examine_mask(blue_mask,&bbits,&bshift);
encode_truecolor_generic( rbits, rshift, gbits, gshift, bbits, bshift,
bitspp, pad, byteorder, i, buffer, debug_len );
}
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