#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "spdo_prv.h"
#define DEBUG 0
#define LOCAL static
#define ABS(X) ( (X < 0) ? -X : X)
#if DEBUG
#include <stdio.h>
#define SHOW(X) printf("X = %d\n", X)
#else
#define SHOW(X)
#endif
#if INCL_BLACK
static void sp_add_intercept_black(PROTO_DECL2 fix15 y, fix15 x);
static void sp_proc_intercepts_black(PROTO_DECL1);
#endif
#if INCL_BLACK
FUNCTION boolean init_black(
GDECL
specs_t GLOBALFAR *specsarg)
{
#if DEBUG
printf("INIT_BLK()\n");
#endif
if (specsarg->flags & CURVES_OUT)
return FALSE;
return (TRUE);
}
#endif
#if INCL_BLACK
FUNCTION boolean begin_char_black(
GDECL
point_t Psw,
point_t Pmin,
point_t Pmax)
{
#if DEBUG
printf("BEGIN_CHAR_BLACK(%3.1f, %3.1f, %3.1f, %3.1f, %3.1f, %3.1f\n",
(real)Psw.x / (real)sp_globals.onepix, (real)Psw.y / (real)sp_globals.onepix,
(real)Pmin.x / (real)sp_globals.onepix, (real)Pmin.y / (real)sp_globals.onepix,
(real)Pmax.x / (real)sp_globals.onepix, (real)Pmax.y / (real)sp_globals.onepix);
#endif
init_char_out(Psw,Pmin,Pmax);
return TRUE;
}
#endif
#if INCL_BLACK
FUNCTION void begin_contour_black(
GDECL
point_t P1,
boolean outside)
{
#if DEBUG
printf("BEGIN_CONTOUR_BLACK(%3.1f, %3.1f, %s)\n",
(real)P1.x / (real)sp_globals.onepix, (real)P1.y / (real)sp_globals.onepix, outside? "outside": "inside");
#endif
sp_globals.x0_spxl = P1.x;
sp_globals.y0_spxl = P1.y;
sp_globals.y_pxl = (sp_globals.y0_spxl + sp_globals.pixrnd) >> sp_globals.pixshift;
}
#endif
#if INCL_BLACK
FUNCTION void line_black(
GDECL
point_t P1)
{
register fix15 how_many_y;
register fix15 yc, i;
fix15 temp1;
fix15 temp2;
register fix31 dx_dy;
register fix31 xc;
fix15 x0,y0,x1,y1;
x0 = sp_globals.x0_spxl;
y0 = sp_globals.y0_spxl;
sp_globals.x0_spxl = x1 = P1.x;
sp_globals.y0_spxl = y1 = P1.y;
yc = sp_globals.y_pxl;
sp_globals.y_pxl = (y1 + sp_globals.pixrnd) >> sp_globals.pixshift;
#if DEBUG
printf("LINE_BLACK(%3.4f, %3.4f)\n",
(real)P1.x/(real)sp_globals.onepix,
(real)P1.y/(real)sp_globals.onepix);
#endif
if (sp_globals.extents_running)
{
if (sp_globals.x0_spxl > sp_globals.bmap_xmax)
sp_globals.bmap_xmax = sp_globals.x0_spxl;
if (sp_globals.x0_spxl < sp_globals.bmap_xmin)
sp_globals.bmap_xmin = sp_globals.x0_spxl;
if (sp_globals.y0_spxl > sp_globals.bmap_ymax)
sp_globals.bmap_ymax = sp_globals.y0_spxl;
if (sp_globals.y0_spxl < sp_globals.bmap_ymin)
sp_globals.bmap_ymin = sp_globals.y0_spxl;
}
if (sp_globals.intercept_oflo) return;
if ((how_many_y = sp_globals.y_pxl - yc) == 0) return;
if (how_many_y < 0) yc--;
if (yc > sp_globals.y_band.band_max)
{
if (sp_globals.y_pxl > sp_globals.y_band.band_max) return;
how_many_y = sp_globals.y_pxl - (yc = sp_globals.y_band.band_max) - 1;
}
if (yc < sp_globals.y_band.band_min)
{
if (sp_globals.y_pxl < sp_globals.y_band.band_min) return;
how_many_y = sp_globals.y_pxl - (yc = sp_globals.y_band.band_min);
}
xc = (fix31)(x0 + sp_globals.pixrnd) << (16 - sp_globals.pixshift);
if ( (temp1 = (x1 - x0)) == 0)
{
yc -= sp_globals.y_band.band_min;
temp1 = (fix15)(xc >> 16);
if (how_many_y < 0)
{
if ((how_many_y += yc + 1) < 0) how_many_y = 0;
for (i = yc; i >= how_many_y; i--)
sp_add_intercept_black(i,temp1);
}
else
{
if ((how_many_y += yc) > sp_globals.no_y_lists) how_many_y = sp_globals.no_y_lists;
for (i = yc; i != how_many_y; i++)
sp_add_intercept_black(i,temp1);
}
return;
}
dx_dy = ( (fix31)temp1 << 16 )/(fix31)(y1 - y0);
temp1 = (yc << sp_globals.pixshift) - y0 + sp_globals.pixrnd;
temp2 = (fix15)(MULT16(temp1,(fix15)(dx_dy >> 16)) >> 15);
if ( (temp2 != (fix15)0xFFFF) &&
(temp2 != 0x0000) &&
(ABS(temp1) < ABS((yc << sp_globals.pixshift) - y1 + sp_globals.pixrnd)) )
{
xc = (fix31)(x1 + sp_globals.pixrnd) << (16 - sp_globals.pixshift);
}
else
{
xc += ((fix31)temp1 * dx_dy) >> sp_globals.pixshift;
}
yc -= sp_globals.y_band.band_min;
if (how_many_y < 0)
{
if (how_many_y == -1)
sp_add_intercept_black(yc, (fix15) (xc >> 16));
else
{
if ((how_many_y += yc + 1) < 0) how_many_y = 0;
for (i = yc; i >= how_many_y; i--)
{
temp1 = (fix15)(xc >> 16);
sp_add_intercept_black(i,temp1);
xc -= dx_dy;
}
}
}
else
{
if (how_many_y == 1)
sp_add_intercept_black(yc, (fix15) (xc >> 16));
else
{
if ((how_many_y += yc) > sp_globals.no_y_lists) how_many_y = sp_globals.no_y_lists;
for (i = yc; i != how_many_y; i++)
{
temp1 = (fix15)(xc >> 16);
sp_add_intercept_black(i,temp1);
xc += dx_dy;
}
}
}
}
#endif
#if INCL_BLACK
FUNCTION boolean end_char_black()
GDECL
{
fix31 xorg;
fix31 yorg;
#if INCL_CLIPPING
fix31 bmap_max, bmap_min;
#endif
#if DEBUG
printf("END_CHAR_BLACK()\n");
#endif
if (sp_globals.first_pass)
{
if (sp_globals.bmap_xmax >= sp_globals.bmap_xmin)
{
sp_globals.xmin = (sp_globals.bmap_xmin + sp_globals.pixrnd + 1) >> sp_globals.pixshift;
sp_globals.xmax = (sp_globals.bmap_xmax + sp_globals.pixrnd) >> sp_globals.pixshift;
}
else
{
sp_globals.xmin = sp_globals.xmax = 0;
}
if (sp_globals.bmap_ymax >= sp_globals.bmap_ymin)
{
#if INCL_CLIPPING
switch(sp_globals.tcb0.xtype)
{
case 1:
if (sp_globals.specs.flags & CLIP_TOP)
{
sp_globals.clip_ymin = (fix31)((fix31)EM_TOP * sp_globals.tcb0.yppo + ((1<<sp_globals.multshift)/2));
sp_globals.clip_ymin = sp_globals.clip_ymin >> sp_globals.multshift;
bmap_min = (sp_globals.bmap_ymin + sp_globals.pixrnd + 1) >> sp_globals.pixshift;
sp_globals.clip_ymin = -1 * sp_globals.clip_ymin;
if (bmap_min < sp_globals.clip_ymin)
sp_globals.ymin = sp_globals.clip_ymin;
else
sp_globals.ymin = bmap_min;
}
if (sp_globals.specs.flags & CLIP_BOTTOM)
{
sp_globals.clip_ymax = (fix31)((fix31)(-1 * EM_BOT) * sp_globals.tcb0.yppo + ((1<<sp_globals.multshift)/2));
sp_globals.clip_ymax = sp_globals.clip_ymax >> sp_globals.multshift;
bmap_max = (sp_globals.bmap_ymax + sp_globals.pixrnd) >> sp_globals.pixshift;
if (bmap_max < sp_globals.clip_ymax)
sp_globals.ymax = bmap_max;
else
sp_globals.ymax = sp_globals.clip_ymax;
}
sp_globals.clip_xmax = -sp_globals.xmin;
sp_globals.clip_xmin = ((sp_globals.set_width.x+32768L) >> 16) -
sp_globals.xmin;
break;
case 2:
if (sp_globals.specs.flags & CLIP_TOP)
{
sp_globals.clip_xmin = (fix31)((fix31)(-1 * EM_BOT) * sp_globals.tcb0.yppo + ((1<<sp_globals.multshift)/2));
sp_globals.clip_xmin = sp_globals.clip_xmin >> sp_globals.multshift;
sp_globals.clip_xmin = -1 * sp_globals.clip_xmin;
bmap_min = (sp_globals.bmap_xmin + sp_globals.pixrnd + 1) >> sp_globals.pixshift;
if (bmap_min > sp_globals.clip_xmin)
sp_globals.clip_xmin = bmap_min;
sp_globals.clip_xmin -= sp_globals.xmin;
}
if (sp_globals.specs.flags & CLIP_BOTTOM)
{
sp_globals.clip_xmax = (fix31)((fix31)EM_TOP * sp_globals.tcb0.yppo + ((1<<sp_globals.multshift)/2));
sp_globals.clip_xmax = sp_globals.clip_xmax >> sp_globals.multshift;
bmap_max = (sp_globals.bmap_xmax + sp_globals.pixrnd) >> sp_globals.pixshift;
if (bmap_max < sp_globals.clip_xmax)
sp_globals.xmax = bmap_max;
else
sp_globals.xmax = sp_globals.clip_xmax;
sp_globals.clip_ymax = 0;
if ((sp_globals.specs.flags & CLIP_TOP) &&
(sp_globals.ymax > sp_globals.clip_ymax))
sp_globals.ymax = sp_globals.clip_ymax;
sp_globals.clip_ymin = ((sp_globals.set_width.y+32768L) >> 16);
if ((sp_globals.specs.flags & CLIP_BOTTOM) &&
(sp_globals.ymin < sp_globals.clip_ymin))
sp_globals.ymin = sp_globals.clip_ymin;
sp_globals.clip_xmax -= sp_globals.xmin;
}
break;
case 3:
if (sp_globals.specs.flags & CLIP_TOP)
{
sp_globals.clip_xmin = (fix31)((fix31)EM_TOP * sp_globals.tcb0.yppo + ((1<<sp_globals.multshift)/2));
sp_globals.clip_xmin = sp_globals.clip_xmin >> sp_globals.multshift;
sp_globals.clip_xmin = -1 * sp_globals.clip_xmin;
bmap_min = (sp_globals.bmap_xmin + sp_globals.pixrnd + 1) >> sp_globals.pixshift;
if (bmap_min > sp_globals.clip_xmin)
sp_globals.clip_xmin = bmap_min;
sp_globals.clip_xmin -= sp_globals.xmin;
}
if (sp_globals.specs.flags & CLIP_BOTTOM)
{
sp_globals.clip_xmax = (fix31)((fix31)(-1 * EM_BOT) * sp_globals.tcb0.yppo + ((1<<sp_globals.multshift)/2));
sp_globals.clip_xmax = sp_globals.clip_xmax >> sp_globals.multshift;
bmap_max = (sp_globals.bmap_xmax + sp_globals.pixrnd) >> sp_globals.pixshift;
if (bmap_max < sp_globals.clip_xmax)
{
sp_globals.xmax = bmap_max;
sp_globals.clip_xmax = bmap_max;
}
else
sp_globals.xmax = sp_globals.clip_xmax;
sp_globals.clip_xmax -= sp_globals.xmin;
}
sp_globals.clip_ymax = ((sp_globals.set_width.y+32768L) >> 16);
if ((sp_globals.specs.flags & CLIP_TOP) &&
(sp_globals.ymax > sp_globals.clip_ymax))
sp_globals.ymax = sp_globals.clip_ymax;
sp_globals.clip_ymin = 0;
if ((sp_globals.specs.flags & CLIP_BOTTOM) &&
(sp_globals.ymin < sp_globals.clip_ymin))
sp_globals.ymin = sp_globals.clip_ymin;
break;
default:
if (sp_globals.specs.flags & CLIP_TOP)
{
sp_globals.clip_ymax = (fix31)((fix31)EM_TOP * sp_globals.tcb0.yppo + ((1<<sp_globals.multshift)/2));
sp_globals.clip_ymax = sp_globals.clip_ymax >> sp_globals.multshift;
bmap_max = (sp_globals.bmap_ymax + sp_globals.pixrnd) >> sp_globals.pixshift;
if (bmap_max > sp_globals.clip_ymax)
sp_globals.ymax = bmap_max;
else
sp_globals.ymax = sp_globals.clip_ymax;
}
if (sp_globals.specs.flags & CLIP_BOTTOM)
{
sp_globals.clip_ymin = (fix31)((fix31)(-1 * EM_BOT) * sp_globals.tcb0.yppo + ((1<<sp_globals.multshift)/2));
sp_globals.clip_ymin = sp_globals.clip_ymin >> sp_globals.multshift;
sp_globals.clip_ymin = - sp_globals.clip_ymin;
bmap_min = (sp_globals.bmap_ymin + sp_globals.pixrnd + 1) >> sp_globals.pixshift;
if (bmap_min < sp_globals.clip_ymin)
sp_globals.ymin = sp_globals.clip_ymin;
else
sp_globals.ymin = bmap_min;
}
sp_globals.clip_xmin = -sp_globals.xmin;
sp_globals.clip_xmax = ((sp_globals.set_width.x+32768L) >> 16) -
sp_globals.xmin;
break;
}
if ( !(sp_globals.specs.flags & CLIP_TOP))
#endif
sp_globals.ymax = (sp_globals.bmap_ymax + sp_globals.pixrnd) >> sp_globals.pixshift;
#if INCL_CLIPPING
if ( !(sp_globals.specs.flags & CLIP_BOTTOM))
#endif
sp_globals.ymin = (sp_globals.bmap_ymin + sp_globals.pixrnd + 1) >> sp_globals.pixshift;
}
else
{
sp_globals.ymin = sp_globals.ymax = 0;
}
if (sp_globals.tcb.xmode == 0)
xorg = (((fix31)sp_globals.xmin << 16) + (sp_globals.rnd_xmin << sp_globals.poshift));
else
if (sp_globals.tcb.xmode == 1)
xorg = (((fix31)sp_globals.xmin << 16) - (sp_globals.rnd_xmin << sp_globals.poshift)) ;
else
xorg = (fix31)sp_globals.xmin << 16;
if (sp_globals.tcb.ymode == 2)
yorg = (((fix31)sp_globals.ymin << 16) + (sp_globals.rnd_xmin << sp_globals.poshift));
else
if (sp_globals.tcb.ymode == 3)
yorg = (((fix31)sp_globals.ymin << 16) - (sp_globals.rnd_xmin << sp_globals.poshift));
else
yorg = (fix31)sp_globals.ymin << 16;
open_bitmap(sp_globals.set_width.x, sp_globals.set_width.y, xorg, yorg,
sp_globals.xmax - sp_globals.xmin, sp_globals.ymax - sp_globals.ymin);
if (sp_globals.intercept_oflo)
{
sp_globals.y_band.band_min = sp_globals.ymin;
sp_globals.y_band.band_max = sp_globals.ymax;
init_intercepts_out();
sp_globals.first_pass = FALSE;
sp_globals.extents_running = FALSE;
return FALSE;
}
else
{
sp_proc_intercepts_black();
close_bitmap();
return TRUE;
}
}
else
{
if (sp_globals.intercept_oflo)
{
reduce_band_size_out();
init_intercepts_out();
return FALSE;
}
else
{
sp_proc_intercepts_black();
if (next_band_out())
{
init_intercepts_out();
return FALSE;
}
close_bitmap();
return TRUE;
}
}
}
#endif
#if INCL_BLACK
FUNCTION LOCAL void sp_add_intercept_black(
GDECL
fix15 y,
fix15 x)
{
register fix15 from;
register fix15 to;
#if DEBUG
printf(" Add intercept(%2d, %d)\n", y + sp_globals.y_band.band_min,x);
if (y < 0)
{
printf(" Intecerpt less than 0!!!\007\n");
return;
}
if (y > (sp_globals.no_y_lists - 1))
{
printf(" Intercept too big for band!!!!!\007\n");
return;
}
#endif
sp_intercepts.car[sp_globals.next_offset] = x;
from = y;
while( (to = sp_intercepts.cdr[from]) >= sp_globals.first_offset)
{
if (x <= sp_intercepts.car[to])
goto insert_element;
from = to;
}
insert_element:
sp_intercepts.cdr[from] = sp_globals.next_offset;
sp_intercepts.cdr[sp_globals.next_offset] = to;
if (++sp_globals.next_offset >= MAX_INTERCEPTS)
{
sp_globals.intercept_oflo = TRUE;
sp_globals.next_offset = sp_globals.first_offset;
}
}
#endif
#if INCL_BLACK
FUNCTION LOCAL void sp_proc_intercepts_black()
GDECL
{
register fix15 i;
register fix15 from, to;
register fix15 y;
register fix15 scan_line;
fix15 first_y, last_y;
#if DEBUG
printf("\nIntercept lists:\n");
#endif
#if INCL_CLIPPING
if ((sp_globals.specs.flags & CLIP_LEFT) != 0)
clipleft = TRUE;
else
clipleft = FALSE;
if ((sp_globals.specs.flags & CLIP_RIGHT) != 0)
clipright = TRUE;
else
clipright = FALSE;
if (clipleft || clipright)
{
xmax = sp_globals.clip_xmax;
xmin = sp_globals.clip_xmin;
}
if (!clipright)
xmax = ((sp_globals.set_width.x+32768L) >> 16);
#endif
if ((first_y = sp_globals.y_band.band_max) >= sp_globals.ymax)
first_y = sp_globals.ymax - 1;
if ((last_y = sp_globals.y_band.band_min) < sp_globals.ymin)
last_y = sp_globals.ymin;
last_y -= sp_globals.y_band.band_min;
#if DEBUG
scan_line = sp_globals.ymax - first_y - 1;
for (y = first_y - sp_globals.y_band.band_min; y >= last_y; y--, scan_line++)
{
i = y;
while ((i = sp_intercepts.cdr[i]) != 0)
{
if ((from = sp_intercepts.car[i] - sp_globals.xmin) < 0)
from = 0;
i = sp_intercepts.cdr[i];
if (i == 0)
{
printf("****** proc_intercepts: odd number of intercepts\n");
break;
}
if ((to = sp_intercepts.car[i]) > sp_globals.xmax)
to = sp_globals.xmax - sp_globals.xmin;
else
to -= sp_globals.xmin;
printf(" Y = %2d (scanline %2d): %d %d:\n",
y + sp_globals.y_band.band_min, scan_line, from, to);
}
}
#endif
scan_line = sp_globals.ymax - first_y - 1;
for (y = first_y - sp_globals.y_band.band_min; y >= last_y; y--, scan_line++)
{
i = y;
while ((i = sp_intercepts.cdr[i]) != 0)
{
if ((from = sp_intercepts.car[i] - sp_globals.xmin) < 0)
from = 0;
i = sp_intercepts.cdr[i];
if ((to = sp_intercepts.car[i]) > sp_globals.xmax)
to = sp_globals.xmax - sp_globals.xmin;
else
to -= sp_globals.xmin;
if (from >= to)
{
if (from >= sp_globals.xmax - sp_globals.xmin)
{
--from ;
}
to = from+1;
}
#if INCL_CLIPPING
if (clipleft)
{
if (to <= xmin)
continue;
if (from < xmin)
from = xmin;
}
if (clipright)
{
if (from >= xmax)
continue;
if (to > xmax)
to = xmax;
}
#endif
set_bitmap_bits(scan_line, from, to);
}
}
}
#endif