mirror of
https://github.com/isometimes/rpi4-osdev
synced 2024-11-24 11:10:40 +00:00
100 lines
2 KiB
C
100 lines
2 KiB
C
#include "../include/wgt.h"
|
|
|
|
extern short *pinit_array;
|
|
extern short *pstartx;
|
|
extern short *pendx;
|
|
extern short polygon_buffer_size;
|
|
|
|
static void wspolyline (short x1, short y1, short x2, short y2)
|
|
{
|
|
short tmx, tmy, y;
|
|
long x, m;
|
|
|
|
if (y2 != y1)
|
|
{
|
|
if (y2 < y1)
|
|
{
|
|
tmy = y1;
|
|
y1 = y2;
|
|
y2 = tmy;
|
|
tmx = x1;
|
|
x1 = x2;
|
|
x2 = tmx;
|
|
}
|
|
|
|
x = (long)x1 << 8;
|
|
m = ((long)(x2 - x1) << 8) / ((long)(y2 - y1));
|
|
x++;
|
|
y1++;
|
|
|
|
for (y = y1; y <= y2; y++)
|
|
{
|
|
if ((y >= 0) && (y < WGT_SYS.yres)) {
|
|
if (pstartx[y] == -16000) {
|
|
pstartx[y] = x >> 8;
|
|
} else {
|
|
pendx[y] = x >> 8;
|
|
}
|
|
}
|
|
x += m;
|
|
}
|
|
}
|
|
}
|
|
|
|
void wsolidpoly (tpolypoint *vertexlist, short numvertex, short x, short y, void (*customline)(short, short, short))
|
|
{
|
|
short i;
|
|
tpolypoint *curpt, *nextpt;
|
|
|
|
if (customline == NULL)
|
|
customline = whline;
|
|
|
|
curpt = vertexlist;
|
|
nextpt = vertexlist + 1;
|
|
|
|
memcpy (pstartx, pinit_array, polygon_buffer_size << 1);
|
|
memcpy (pendx, pinit_array, polygon_buffer_size << 1);
|
|
|
|
for (i = 0; i < numvertex - 1; i++)
|
|
{
|
|
wspolyline (curpt->x + x, curpt->y + y, nextpt->x + x, nextpt->y + y);
|
|
curpt++;
|
|
nextpt++;
|
|
}
|
|
|
|
nextpt = vertexlist;
|
|
wspolyline (curpt->x + x, curpt->y + y, nextpt->x + x, nextpt->y + y);
|
|
|
|
for (i = 0; i < WGT_SYS.yres; i++)
|
|
{
|
|
if (pstartx[i] != -16000)
|
|
{
|
|
if (pendx[i] == -16000)
|
|
pendx[i] = pstartx[i];
|
|
(*customline)(pstartx[i], pendx[i], i);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void whollowpoly(tpolypoint *vertexlist, short numvertex, short x, short y, short closemode)
|
|
{
|
|
short i;
|
|
tpolypoint *curpt, *nextpt;
|
|
|
|
curpt = vertexlist;
|
|
nextpt = vertexlist + 1;
|
|
|
|
for (i = 0; i < numvertex - 1; i++)
|
|
{
|
|
wline (curpt->x + x, curpt->y + y, nextpt->x + x, nextpt->y + y);
|
|
curpt++;
|
|
nextpt++;
|
|
}
|
|
|
|
if (closemode == CLOSED_POLY)
|
|
{
|
|
nextpt = vertexlist;
|
|
wline (curpt->x + x, curpt->y + y, nextpt->x + x, nextpt->y + y);
|
|
}
|
|
}
|