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#include "fitz.h"
typedef unsigned char byte;
/*
* Blend pixmap regions
*/
/* dst = src over dst */
static void
duff_non(byte * restrict sp0, int sw, int sn, byte * restrict dp0, int dw, int w0, int h)
{
int k;
while (h--)
{
byte *sp = sp0;
byte *dp = dp0;
int w = w0;
while (w--)
{
byte sa = sp[0];
byte ssa = 255 - sa;
for (k = 0; k < sn; k++)
{
dp[k] = sp[k] + fz_mul255(dp[k], ssa);
}
sp += sn;
dp += sn;
}
sp0 += sw;
dp0 += dw;
}
}
/* dst = src in msk */
static void
duff_nimcn(byte * restrict sp0, int sw, int sn, byte * restrict mp0, int mw, int mn, byte * restrict dp0, int dw, int w0, int h)
{
int k;
while (h--)
{
byte *sp = sp0;
byte *mp = mp0;
byte *dp = dp0;
int w = w0;
while (w--)
{
byte ma = mp[0];
for (k = 0; k < sn; k++)
dp[k] = fz_mul255(sp[k], ma);
sp += sn;
mp += mn;
dp += sn;
}
sp0 += sw;
mp0 += mw;
dp0 += dw;
}
}
/* dst = src in msk over dst */
static void
duff_nimon(byte * restrict sp0, int sw, int sn, byte * restrict mp0, int mw, int mn, byte * restrict dp0, int dw, int w0, int h)
{
int k;
while (h--)
{
byte *sp = sp0;
byte *mp = mp0;
byte *dp = dp0;
int w = w0;
while (w--)
{
/* TODO: validate this */
byte ma = mp[0];
byte sa = fz_mul255(sp[0], ma);
byte ssa = 255 - sa;
for (k = 0; k < sn; k++)
{
dp[k] = fz_mul255(sp[k], ma) + fz_mul255(dp[k], ssa);
}
sp += sn;
mp += mn;
dp += sn;
}
sp0 += sw;
mp0 += mw;
dp0 += dw;
}
}
static void duff_1o1(byte * restrict sp0, int sw, byte * restrict dp0, int dw, int w0, int h)
{
/* duff_non(sp0, sw, 1, dp0, dw, w0, h); */
while (h--)
{
byte *sp = sp0;
byte *dp = dp0;
int w = w0;
while (w--)
{
dp[0] = sp[0] + fz_mul255(dp[0], 255 - sp[0]);
sp ++;
dp ++;
}
sp0 += sw;
dp0 += dw;
}
}
static void duff_4o4(byte *sp0, int sw, byte *dp0, int dw, int w0, int h)
{
/* duff_non(sp0, sw, 4, dp0, dw, w0, h); */
while (h--)
{
byte *sp = sp0;
byte *dp = dp0;
int w = w0;
while (w--)
{
byte ssa = 255 - sp[0];
dp[0] = sp[0] + fz_mul255(dp[0], ssa);
dp[1] = sp[1] + fz_mul255(dp[1], ssa);
dp[2] = sp[2] + fz_mul255(dp[2], ssa);
dp[3] = sp[3] + fz_mul255(dp[3], ssa);
sp += 4;
dp += 4;
}
sp0 += sw;
dp0 += dw;
}
}
static void duff_1i1c1(byte * restrict sp0, int sw, byte * restrict mp0, int mw, byte * restrict dp0, int dw, int w0, int h)
{
/* duff_nimcn(sp0, sw, 1, mp0, mw, 1, dp0, dw, w0, h); */
while (h--)
{
byte *sp = sp0;
byte *mp = mp0;
byte *dp = dp0;
int w = w0;
while (w--)
{
dp[0] = fz_mul255(sp[0], mp[0]);
sp ++;
mp ++;
dp ++;
}
sp0 += sw;
mp0 += mw;
dp0 += dw;
}
}
static void duff_4i1c4(byte * restrict sp0, int sw, byte * restrict mp0, int mw, byte * restrict dp0, int dw, int w0, int h)
{
/* duff_nimcn(sp0, sw, 4, mp0, mw, 1, dp0, dw, w0, h); */
while (h--)
{
byte *sp = sp0;
byte *mp = mp0;
byte *dp = dp0;
int w = w0;
while (w--)
{
byte ma = mp[0];
dp[0] = fz_mul255(sp[0], ma);
dp[1] = fz_mul255(sp[1], ma);
dp[2] = fz_mul255(sp[2], ma);
dp[3] = fz_mul255(sp[3], ma);
sp += 4;
mp += 1;
dp += 4;
}
sp0 += sw;
mp0 += mw;
dp0 += dw;
}
}
static void duff_1i1o1(byte * restrict sp0, int sw, byte * restrict mp0, int mw, byte * restrict dp0, int dw, int w0, int h)
{
/* duff_nimon(sp0, sw, 1, mp0, mw, 1, dp0, dw, w0, h); */
while (h--)
{
byte *sp = sp0;
byte *mp = mp0;
byte *dp = dp0;
int w = w0;
while (w--)
{
byte ma = mp[0];
byte sa = fz_mul255(sp[0], ma);
byte ssa = 255 - sa;
dp[0] = fz_mul255(sp[0], ma) + fz_mul255(dp[0], ssa);
sp ++;
mp ++;
dp ++;
}
sp0 += sw;
mp0 += mw;
dp0 += dw;
}
}
static void duff_4i1o4(byte * restrict sp0, int sw, byte * restrict mp0, int mw, byte * restrict dp0, int dw, int w0, int h)
{
/* duff_nimon(sp0, sw, 4, mp0, mw, 1, dp0, dw, w0, h); */
while (h--)
{
byte *sp = sp0;
byte *mp = mp0;
byte *dp = dp0;
int w = w0;
while (w--)
{
byte ma = mp[0];
byte sa = fz_mul255(sp[0], ma);
byte ssa = 255 - sa;
dp[0] = fz_mul255(sp[0], ma) + fz_mul255(dp[0], ssa);
dp[1] = fz_mul255(sp[1], ma) + fz_mul255(dp[1], ssa);
dp[2] = fz_mul255(sp[2], ma) + fz_mul255(dp[2], ssa);
dp[3] = fz_mul255(sp[3], ma) + fz_mul255(dp[3], ssa);
sp += 4;
mp += 1;
dp += 4;
}
sp0 += sw;
mp0 += mw;
dp0 += dw;
}
}
/*
* Path and text masks
*/
static void path_1c1(byte * restrict src, byte cov, int len, byte * restrict dst)
{
while (len--)
{
cov += *src; *src = 0; src++;
*dst++ = cov;
}
}
static void path_1o1(byte * restrict src, byte cov, int len, byte * restrict dst)
{
while (len--)
{
cov += *src; *src = 0; src++;
dst[0] = cov + fz_mul255(dst[0], 255 - cov);
dst++;
}
}
// With 4 In 1 Over 4
static void path_w4i1o4(byte * restrict argb, byte * restrict src, byte cov, int len, byte * restrict dst)
{
byte alpha = argb[0];
byte r = argb[1];
byte g = argb[2];
byte b = argb[3];
while (len--)
{
byte ca;
cov += *src; *src = 0; src++;
ca = fz_mul255(cov, alpha);
dst[0] = ca + fz_mul255(dst[0], 255 - ca);
dst[1] = fz_mul255((short)r - dst[1], ca) + dst[1];
dst[2] = fz_mul255((short)g - dst[2], ca) + dst[2];
dst[3] = fz_mul255((short)b - dst[3], ca) + dst[3];
dst += 4;
}
}
static void text_1c1(byte * restrict src0, int srcw, byte * restrict dst0, int dstw, int w0, int h)
{
while (h--)
{
byte * restrict src = src0;
byte * restrict dst = dst0;
int w = w0;
while (w--)
{
*dst++ = *src++;
}
src0 += srcw;
dst0 += dstw;
}
}
static void text_1o1(byte * restrict src0, int srcw, byte * restrict dst0, int dstw, int w0, int h)
{
while (h--)
{
byte *src = src0;
byte *dst = dst0;
int w = w0;
while (w--)
{
dst[0] = src[0] + fz_mul255(dst[0], 255 - src[0]);
src++;
dst++;
}
src0 += srcw;
dst0 += dstw;
}
}
static void text_w4i1o4(byte * restrict argb, byte * restrict src0, int srcw, byte * restrict dst0, int dstw, int w0, int h)
{
unsigned char alpha = argb[0];
unsigned char r = argb[4];
unsigned char g = argb[5];
unsigned char b = argb[6];
while (h--)
{
byte *src = src0;
byte *dst = dst0;
int w = w0;
while (w--)
{
byte ca = fz_mul255(src[0], alpha);
dst[0] = ca + fz_mul255(dst[0], 255 - ca);
dst[1] = fz_mul255((short)r - dst[1], ca) + dst[1];
dst[2] = fz_mul255((short)g - dst[2], ca) + dst[2];
dst[3] = fz_mul255((short)b - dst[3], ca) + dst[3];
src ++;
dst += 4;
}
src0 += srcw;
dst0 += dstw;
}
}
/*
* ... and the function pointers
*/
void (*fz_duff_non)(byte*,int,int,byte*,int,int,int) = duff_non;
void (*fz_duff_nimcn)(byte*,int,int,byte*,int,int,byte*,int,int,int) = duff_nimcn;
void (*fz_duff_nimon)(byte*,int,int,byte*,int,int,byte*,int,int,int) = duff_nimon;
void (*fz_duff_1o1)(byte*,int,byte*,int,int,int) = duff_1o1;
void (*fz_duff_4o4)(byte*,int,byte*,int,int,int) = duff_4o4;
void (*fz_duff_1i1c1)(byte*,int,byte*,int,byte*,int,int,int) = duff_1i1c1;
void (*fz_duff_4i1c4)(byte*,int,byte*,int,byte*,int,int,int) = duff_4i1c4;
void (*fz_duff_1i1o1)(byte*,int,byte*,int,byte*,int,int,int) = duff_1i1o1;
void (*fz_duff_4i1o4)(byte*,int,byte*,int,byte*,int,int,int) = duff_4i1o4;
void (*fz_path_1c1)(byte*,byte,int,byte*) = path_1c1;
void (*fz_path_1o1)(byte*,byte,int,byte*) = path_1o1;
void (*fz_path_w4i1o4)(byte*,byte*,byte,int,byte*) = path_w4i1o4;
void (*fz_text_1c1)(byte*,int,byte*,int,int,int) = text_1c1;
void (*fz_text_1o1)(byte*,int,byte*,int,int,int) = text_1o1;
void (*fz_text_w4i1o4)(byte*,byte*,int,byte*,int,int,int) = text_w4i1o4;
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