public static void *stbtt__hheap_alloc(stbtt__hheap *hh, ulong size, void *userdata)
{
if ((hh->first_free) != null)
{
void *p = hh->first_free;
hh->first_free = *(void **)(p);
return(p);
}
else
{
if ((hh->num_remaining_in_head_chunk) == (0))
{
int count = (int)((size) < (32) ? 2000 : (size) < (128) ? 800 : 100);
stbtt__hheap_chunk *c = (stbtt__hheap_chunk *)(CRuntime.malloc((ulong)((ulong)sizeof(stbtt__hheap_chunk) + size * (ulong)(count))));
if ((c) == (null))
{
return(null);
}
c->next = hh->head;
hh->head = c;
hh->num_remaining_in_head_chunk = (int)(count);
}
--hh->num_remaining_in_head_chunk;
return((sbyte *)(hh->head) + sizeof(stbtt__hheap_chunk) + size * (ulong)hh->num_remaining_in_head_chunk);
}
}
public static void *stbtt__hheap_alloc(stbtt__hheap *hh, ulong size, void *userdata)
{
if (hh->first_free != null)
{
var p = hh->first_free;
hh->first_free = *(void **)p;
return(p);
}
if (hh->num_remaining_in_head_chunk == 0)
{
var count = size < 32 ? 2000 : size < 128 ? 800 : 100;
var c = (stbtt__hheap_chunk *)CRuntime.malloc((ulong)sizeof(stbtt__hheap_chunk) +
size * (ulong)count);
if (c == null)
{
return(null);
}
c->next = hh->head;
hh->head = c;
hh->num_remaining_in_head_chunk = count;
}
--hh->num_remaining_in_head_chunk;
return((sbyte *)hh->head + sizeof(stbtt__hheap_chunk) + size * (ulong)hh->num_remaining_in_head_chunk);
}
public static void stbtt__hheap_cleanup(stbtt__hheap *hh, void *userdata)
{
stbtt__hheap_chunk *c = hh->head;
while ((c) != null)
{
stbtt__hheap_chunk *n = c->next;
CRuntime.free(c);
c = n;
}
}
public static stbtt__active_edge *stbtt__new_active(stbtt__hheap *hh, stbtt__edge *e, int off_x, float start_point, void *userdata)
{
stbtt__active_edge *z = (stbtt__active_edge *)(stbtt__hheap_alloc(hh, (ulong)(sizeof(stbtt__active_edge)), userdata));
float dxdy = (float)((e->x1 - e->x0) / (e->y1 - e->y0));
if (z == null)
{
return(z);
}
z->fdx = (float)(dxdy);
z->fdy = (float)(dxdy != 0.0f ? (1.0f / dxdy) : 0.0f);
z->fx = (float)(e->x0 + dxdy * (start_point - e->y0));
z->fx -= (float)(off_x);
z->direction = (float)((e->invert) != 0 ? 1.0f : -1.0f);
z->sy = (float)(e->y0);
z->ey = (float)(e->y1);
z->next = null;
return(z);
}
public static stbtt__active_edge *stbtt__new_active(stbtt__hheap *hh, stbtt__edge *e, int off_x,
float start_point, void *userdata)
{
var z = (stbtt__active_edge *)stbtt__hheap_alloc(hh, (ulong)sizeof(stbtt__active_edge), userdata);
var dxdy = (e->x1 - e->x0) / (e->y1 - e->y0);
if (z == null)
{
return(z);
}
z->fdx = dxdy;
z->fdy = dxdy != 0.0f ? 1.0f / dxdy : 0.0f;
z->fx = e->x0 + dxdy * (start_point - e->y0);
z->fx -= off_x;
z->direction = e->invert != 0 ? 1.0f : -1.0f;
z->sy = e->y0;
z->ey = e->y1;
z->next = null;
return(z);
}
public static void stbtt__hheap_free(stbtt__hheap *hh, void *p)
{
*(void **)(p) = hh->first_free;
hh->first_free = p;
}
