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#include "fitz.h"
typedef unsigned char byte;
/* These C implementations use SWAR (SIMD-within-a-register) techniques. */
#if 0 /* TODO: move into porterduff.c functions */
#define MASK 0xFF00FF00;
static void
path_w4i1o4_32bit(byte *rgba,
byte * restrict src, byte cov, int len, byte * restrict dst)
{
/* COLOR * coverage + DST * (256-coverage) = (COLOR - DST)*coverage + DST*256 */
unsigned int *dst32 = (unsigned int *)(void *)dst;
int alpha = rgba[3];
unsigned int rb = rgba[0] | (rgba[2] << 16);
unsigned int ga = rgba[1] | 0xFF0000;
if (alpha == 0)
return;
if (alpha != 255)
{
alpha += alpha>>7; /* alpha is now in the 0...256 range */
while (len--)
{
unsigned int ca, drb, dga, crb, cga;
cov += *src; *src++ = 0;
ca = cov + (cov>>7); /* ca is in 0...256 range */
ca = (ca*alpha)>>8; /* ca is is in 0...256 range */
drb = *dst32++;
if (ca != 0)
{
dga = drb & MASK;
drb = (drb<<8) & MASK;
cga = ga - (dga>>8);
crb = rb - (drb>>8);
dga += cga * ca;
drb += crb * ca;
dga &= MASK;
drb &= MASK;
drb = dga | (drb>>8);
dst32[-1] = drb;
}
}
}
else
{
while (len--)
{
unsigned int ca, drb, dga, crb, cga;
cov += *src; *src++ = 0;
ca = cov + (cov>>7); /* ca is in 0...256 range */
drb = *dst32++;
if (ca == 0)
continue;
if (ca == 255)
{
drb = (ga<<8) | rb;
}
else
{
dga = drb & MASK;
drb = (drb<<8) & MASK;
cga = ga - (dga>>8);
crb = rb - (drb>>8);
dga += cga * ca;
drb += crb * ca;
dga &= MASK;
drb &= MASK;
drb = dga |(drb>>8);
}
dst32[-1] = drb;
}
}
}
static void
text_w4i1o4_32bit(byte *rgba,
byte * restrict src, int srcw,
byte * restrict dst, int dstw, int w0, int h)
{
unsigned int *dst32 = (unsigned int *)(void *)dst;
unsigned int alpha = rgba[3];
unsigned int rb = rgba[0] | (rgba[2] << 16);
unsigned int ga = rgba[1] | 0xFF0000;
if (alpha == 0)
return;
srcw -= w0;
dstw = (dstw>>2)-w0;
if (alpha != 255)
{
alpha += alpha>>7; /* alpha is now in the 0...256 range */
while (h--)
{
int w = w0;
while (w--)
{
unsigned int ca, drb, dga, crb, cga;
ca = *src++;
drb = *dst32++;
ca += ca>>7;
ca = (ca*alpha)>>8;
if (ca == 0)
continue;
dga = drb & MASK;
drb = (drb<<8) & MASK;
cga = ga - (dga>>8);
crb = rb - (drb>>8);
dga += cga * ca;
drb += crb * ca;
dga &= MASK;
drb &= MASK;
drb = dga | (drb>>8);
dst32[-1] = drb;
}
src += srcw;
dst32 += dstw;
}
}
else
{
while (h--)
{
int w = w0;
while (w--)
{
unsigned int ca, drb, dga, crb, cga;
ca = *src++;
drb = *dst32++;
ca += ca>>7;
if (ca == 0)
continue;
dga = drb & MASK;
drb = (drb<<8) & MASK;
cga = ga - (dga>>8);
crb = rb - (drb>>8);
dga += cga * ca;
drb += crb * ca;
dga &= MASK;
drb &= MASK;
drb = dga | (drb>>8);
dst32[-1] = drb;
}
src += srcw;
dst32 += dstw;
}
}
}
static void
img_4o4_32bit(byte * restrict src, byte cov, int len, byte * restrict dst,
fz_pixmap *image, int u, int v, int fa, int fb)
{
unsigned int *dst32 = (unsigned int *)(void *)dst;
unsigned int *samples = (unsigned int *)(void *)image->samples;
int w = image->w;
int h = image->h-1;
while (len--)
{
unsigned int a, a1, d, d1;
int sa;
cov += *src; *src = 0; src++;
/* (a,a1) = sampleargb(samples, w, h, u, v, argb); */
{
int ui, ui1, vi, vi1, ud, vd;
unsigned int b, b1, c, c1;
ui1 = 1;
ui = u >> 16;
if (ui < 0)
{
ui = 0;
ui1 = 0;
}
else if (ui >= w-1)
{
ui = w-1;
ui1 = 0;
}
vi1 = w;
vi = v >> 16;
if (vi < 0)
{
vi = 0;
vi1 = 0;
}
else if (vi >= h)
{
vi = h;
vi1 = 0;
}
ui += vi*w;
a = samples[ui];
b = samples[ui + ui1];
c = samples[ui + vi1];
d = samples[ui + ui1 + vi1];
ud = (u>>8) & 0xFF;
vd = (v>>8) & 0xFF;
ud = FZ_EXPAND(ud);
vd = FZ_EXPAND(vd);
/* (a,a1) = blend(a,b,ud) */
a1 = a & MASK;
a = (a<<8) & MASK;
b1 = (b>>8) & ~MASK;
b = b & ~MASK;
a = ((b -(a >>8)) * ud + a ) & MASK;
a1 = ((b1-(a1>>8)) * ud + a1) & MASK;
/* (c,c1) = blend(c,d,ud) */
c1 = c & MASK;
c = (c<<8) & MASK;
d1 = (d>>8) & ~MASK;
d = d & ~MASK;
c = ((d -(c >>8)) * ud + c ) & MASK;
c1 = ((d1-(c1>>8)) * ud + c1) & MASK;
/* (a,a1) = blend((a,a1),(c,c1),vd) */
a = (((c >>8)-(a >>8)) * vd + a ) & MASK;
a1 = (((c1>>8)-(a1>>8)) * vd + a1) & MASK;
}
sa = (a1>>24);
sa = FZ_COMBINE(FZ_EXPAND(sa), FZ_EXPAND(cov));
a1 |= 0xFF000000;
d = *dst32++;
d1 = d & MASK;
d = (d<<8) & MASK;
a = (((a >>8)-(d >>8)) * sa + d ) & MASK;
a1 = (((a1>>8)-(d1>>8)) * sa + d1) & MASK;
dst32[-1] = (a>>8) | a1;
u += fa;
v += fb;
}
}
static void
img_w4i1o4_32bit(byte *rgba, byte * restrict src, byte cov, int len,
byte * restrict dst, fz_pixmap *image, int u, int v, int fa, int fb)
{
byte *samples = image->samples;
int w = image->w;
int h = image->h-1;
int alpha = FZ_EXPAND(rgba[3]);
unsigned int rb = rgba[0] | (rgba[2] << 16);
unsigned int ga = rgba[1] | 0xFF0000;
unsigned int *dst32 = (unsigned int *)(void *)dst;
if (alpha == 0)
return;
if (alpha != 256)
{
while (len--)
{
unsigned int ca, drb, dga, crb, cga;
unsigned int a, b;
cov += *src; *src = 0; src++;
drb = *dst32++;
ca = FZ_COMBINE(FZ_EXPAND(cov), alpha);
if (ca != 0)
{
int ui, ui1, vi, vi1, ud, vd;
/* a = samplemask(samples, w, h, u, v); */
ui1 = 1;
ui = u >> 16;
if (ui < 0)
{
ui = 0;
ui1 = 0;
}
else if (ui >= w-1)
{
ui = w-1;
ui1 = 0;
}
vi1 = w;
vi = v >> 16;
if (vi < 0)
{
vi = 0;
vi1 = 0;
}
else if (vi >= h)
{
vi = h;
vi1 = 0;
}
ui += vi*w;
a = samples[ui];
b = samples[ui + ui1];
a |= samples[ui + vi1]<<16;
b |= samples[ui + ui1 + vi1]<<16;
ud = (u>>8) & 0xFF;
vd = (v>>8) & 0xFF;
ud = FZ_EXPAND(ud);
vd = FZ_EXPAND(vd);
/* a = blend(a,b,ud) */
a = ((b-a) * ud + (a<<8)) & MASK;
/* a = blend(a,a>>16,vd) */
a = (((a>>24)-(a>>8)) * vd + a);
a = (a>>8) & 0xFF;
ca = FZ_COMBINE(ca, FZ_EXPAND(a));
}
if (ca != 0)
{
dga = drb & MASK;
drb = (drb<<8) & MASK;
cga = ga - (dga>>8);
crb = rb - (drb>>8);
dga += cga * ca;
drb += crb * ca;
dga &= MASK;
drb &= MASK;
drb = dga | (drb>>8);
dst32[-1] = drb;
}
u += fa;
v += fb;
}
}
else
{
while (len--)
{
unsigned int ca, drb, dga, crb, cga;
unsigned int a, b;
cov += *src; *src = 0; src++;
drb = *dst32++;
if (cov != 0)
{
int ui, ui1, vi, vi1, ud, vd;
/* a = samplemask(samples, w, h, u, v); */
ui1 = 1;
ui = u >> 16;
if (ui < 0)
{
ui = 0;
ui1 = 0;
}
else if (ui >= w-1)
{
ui = w-1;
ui1 = 0;
}
vi1 = w;
vi = v >> 16;
if (vi < 0)
{
vi = 0;
vi1 = 0;
}
else if (vi >= h)
{
vi = h;
vi1 = 0;
}
ui += vi*w;
a = samples[ui];
b = samples[ui + ui1];
a |= samples[ui + vi1]<<16;
b |= samples[ui + ui1 + vi1]<<16;
ud = (u>>8) & 0xFF;
vd = (v>>8) & 0xFF;
ud = FZ_EXPAND(ud);
vd = FZ_EXPAND(vd);
/* a = blend(a,b,ud) */
a = ((b-a) * ud + (a<<8)) & MASK;
/* a = blend(a,a>>16,vd) */
a = (((a>>24)-(a>>8)) * vd + a);
a = (a>>8) & 0xFF;
ca = FZ_COMBINE(FZ_EXPAND(cov),FZ_EXPAND(a));
if (ca != 0)
{
if (ca == 256)
{
drb = (ga<<8) | rb;
}
else
{
dga = drb & MASK;
drb = (drb<<8) & MASK;
cga = ga - (dga>>8);
crb = rb - (drb>>8);
dga += cga * ca;
drb += crb * ca;
dga &= MASK;
drb &= MASK;
drb = dga | (drb>>8);
}
dst32[-1] = drb;
}
}
u += fa;
v += fb;
}
}
}
static void
img_1o1_32bit(byte * restrict src, byte cov, int len, byte * restrict dst,
fz_pixmap *image, int u, int v, int fa, int fb)
{
byte *samples = image->samples;
int w = image->w;
int h = image->h-1;
while (len--)
{
unsigned int a, b;
cov += *src; *src = 0; src++;
if (cov != 0)
{
int ui, ui1, vi, vi1, ud, vd;
/* sa = samplemask(samples, w, h, u, v); */
ui1 = 1;
ui = u >> 16;
if (ui < 0)
{
ui = 0;
ui1 = 0;
}
else if (ui >= w-1)
{
ui = w-1;
ui1 = 0;
}
vi1 = w;
vi = v >> 16;
if (vi < 0)
{
vi = 0;
vi1 = 0;
}
else if (vi >= h)
{
vi = h;
vi1 = 0;
}
ui += vi*w;
a = samples[ui];
b = samples[ui + ui1];
a |= samples[ui + vi1]<<16;
b |= samples[ui + ui1 + vi1]<<16;
ud = (u>>8) & 0xFF;
vd = (v>>8) & 0xFF;
ud = FZ_EXPAND(ud);
vd = FZ_EXPAND(vd);
/* a = blend(a,b,ud) */
a = ((b-a) * ud + (a<<8)) & MASK;
/* a = blend(a,a>>16,vd) */
a = (((a>>24)-(a>>8)) * vd + a);
a = (a>>8) & 0xFF;
a = FZ_COMBINE(FZ_EXPAND(a), FZ_EXPAND(cov));
if (a != 0)
{
if (a == 256)
dst[0] = 255;
else
dst[0] = FZ_BLEND(255, dst[0], a);
}
}
dst++;
u += fa;
v += fb;
}
}
#endif
void fz_accelerate(void)
{
if (sizeof(int) == 4 && sizeof(unsigned int) == 4 && !fz_isbigendian())
{
// fz_path_w4i1o4 = path_w4i1o4_32bit;
// fz_text_w4i1o4 = text_w4i1o4_32bit;
// fz_img_4o4 = img_4o4_32bit;
// fz_img_w4i1o4 = img_w4i1o4_32bit;
// fz_img_1o1 = img_1o1_32bit;
}
#ifdef HAVE_CPUDEP
fz_acceleratearch();
#endif
}
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