public static void stbtt__rasterize(stbtt__bitmap *result, stbtt__point *pts, int *wcount, int windings,
float scale_x, float scale_y, float shift_x, float shift_y, int off_x, int off_y, int invert,
void *userdata)
{
var y_scale_inv = invert != 0 ? -scale_y : scale_y;
stbtt__edge *e;
var n = 0;
var i = 0;
var j = 0;
var k = 0;
var m = 0;
var vsubsample = 1;
n = 0;
for (i = 0; i < windings; ++i)
{
n += wcount[i];
}
e = (stbtt__edge *)CRuntime.malloc((ulong)(sizeof(stbtt__edge) * (n + 1)));
if (e == null)
{
return;
}
n = 0;
m = 0;
for (i = 0; i < windings; ++i)
{
var p = pts + m;
m += wcount[i];
j = wcount[i] - 1;
for (k = 0; k < wcount[i]; j = k++)
{
var a = k;
var b = j;
if (p[j].y == p[k].y)
{
continue;
}
e[n].invert = 0;
if (invert != 0 && p[j].y > p[k].y ||
invert == 0 && p[j].y < p[k].y)
{
e[n].invert = 1;
a = j;
b = k;
}
e[n].x0 = p[a].x * scale_x + shift_x;
e[n].y0 = (p[a].y * y_scale_inv + shift_y) * vsubsample;
e[n].x1 = p[b].x * scale_x + shift_x;
e[n].y1 = (p[b].y * y_scale_inv + shift_y) * vsubsample;
++n;
}
}
stbtt__sort_edges(e, n);
stbtt__rasterize_sorted_edges(result, e, n, vsubsample, off_x, off_y, userdata);
CRuntime.free(e);
}
public static void stbtt__rasterize(stbtt__bitmap *result, stbtt__point *pts, int *wcount, int windings, float scale_x, float scale_y, float shift_x, float shift_y, int off_x, int off_y, int invert, void *userdata)
{
float y_scale_inv = (invert) != 0 ? -scale_y : scale_y;
stbtt__edge *e;
int n = 0;
int i = 0;
int j = 0;
int k = 0;
int m = 0;
int vsubsample = 1;
n = 0;
for (i = 0; (i) < (windings); ++i)
{
n += wcount[i];
}
e = (stbtt__edge *)(CRuntime.Malloc((ulong)(sizeof(stbtt__edge) * (n + 1))));
if ((e) == (null))
{
return;
}
n = 0;
m = 0;
for (i = 0; (i) < (windings); ++i)
{
stbtt__point *p = pts + m;
m += wcount[i];
j = wcount[i] - 1;
for (k = 0; (k) < (wcount[i]); j = k++)
{
int a = k;
int b = j;
if ((p[j].y) == (p[k].y))
{
continue;
}
e[n].invert = 0;
if ((((invert) != 0) && ((p[j].y) > (p[k].y))) || ((invert == 0) && ((p[j].y) < (p[k].y))))
{
e[n].invert = 1;
a = j;
b = k;
}
e[n].x0 = p[a].x * scale_x + shift_x;
e[n].y0 = (p[a].y * y_scale_inv + shift_y) * vsubsample;
e[n].x1 = p[b].x * scale_x + shift_x;
e[n].y1 = (p[b].y * y_scale_inv + shift_y) * vsubsample;
++n;
}
}
stbtt__sort_edges(e, n);
stbtt__rasterize_sorted_edges(result, e, n, vsubsample, off_x, off_y, userdata);
CRuntime.Free(e);
}
public static void stbtt__rasterize(stbtt__bitmap *result, stbtt__point *pts, int *wcount, int windings, float scale_x, float scale_y, float shift_x, float shift_y, int off_x, int off_y, int invert, void *userdata)
{
float y_scale_inv = (float)((invert) != 0 ? -scale_y : scale_y);
stbtt__edge *e;
int n = 0;
int i = 0;
int j = 0;
int k = 0;
int m = 0;
int vsubsample = (int)(1);
n = (int)(0);
for (i = (int)(0); (i) < (windings); ++i)
{
n += (int)(wcount[i]);
}
e = (stbtt__edge *)(CRuntime.malloc((ulong)(sizeof(stbtt__edge) * (n + 1))));
if ((e) == (null))
{
return;
}
n = (int)(0);
m = (int)(0);
for (i = (int)(0); (i) < (windings); ++i)
{
stbtt__point *p = pts + m;
m += (int)(wcount[i]);
j = (int)(wcount[i] - 1);
for (k = (int)(0); (k) < (wcount[i]); j = (int)(k++))
{
int a = (int)(k);
int b = (int)(j);
if ((p[j].y) == (p[k].y))
{
continue;
}
e[n].invert = (int)(0);
if ((((invert) != 0) && ((p[j].y) > (p[k].y))) || ((invert == 0) && ((p[j].y) < (p[k].y))))
{
e[n].invert = (int)(1);
a = (int)(j);
b = (int)(k);
}
e[n].x0 = (float)(p[a].x * scale_x + shift_x);
e[n].y0 = (float)((p[a].y * y_scale_inv + shift_y) * vsubsample);
e[n].x1 = (float)(p[b].x * scale_x + shift_x);
e[n].y1 = (float)((p[b].y * y_scale_inv + shift_y) * vsubsample);
++n;
}
}
stbtt__sort_edges(e, (int)(n));
stbtt__rasterize_sorted_edges(result, e, (int)(n), (int)(vsubsample), (int)(off_x), (int)(off_y), userdata);
CRuntime.free(e);
}
public static void stbtt_Rasterize(stbtt__bitmap *result, float flatness_in_pixels, stbtt_vertex *vertices, int num_verts, float scale_x, float scale_y, float shift_x, float shift_y, int x_off, int y_off, int invert, void *userdata)
{
float scale = (scale_x) > (scale_y) ? scale_y : scale_x;
int winding_count = 0;
int * winding_lengths = (null);
stbtt__point *windings = stbtt_FlattenCurves(vertices, num_verts, flatness_in_pixels / scale, &winding_lengths, &winding_count, userdata);
if ((windings) != null)
{
stbtt__rasterize(result, windings, winding_lengths, winding_count, scale_x, scale_y, shift_x, shift_y, x_off, y_off, invert, userdata);
CRuntime.Free(winding_lengths);
CRuntime.Free(windings);
}
}
public static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e, int n, int vsubsample, int off_x, int off_y, void *userdata)
{
stbtt__hheap hh = new stbtt__hheap();
stbtt__active_edge *active = (null);
int y = 0;
int j = 0;
int i = 0;
float *scanline_data = stackalloc float[129];
float *scanline;
float *scanline2;
if ((result->w) > (64))
{
scanline = (float *)(CRuntime.Malloc((ulong)((result->w * 2 + 1) * sizeof(float))));
}
else
{
scanline = scanline_data;
}
scanline2 = scanline + result->w;
y = off_y;
e[n].y0 = (float)(off_y + result->h) + 1;
while ((j) < (result->h))
{
float scan_y_top = y + 0.0f;
float scan_y_bottom = y + 1.0f;
stbtt__active_edge **step = &active;
CRuntime.Memset(scanline, 0, (ulong)(result->w * sizeof(float)));
CRuntime.Memset(scanline2, 0, (ulong)((result->w + 1) * sizeof(float)));
while ((*step) != null)
{
stbtt__active_edge *z = *step;
if (z->ey <= scan_y_top)
{
*step = z->next;
z->direction = 0;
stbtt__hheap_free(&hh, z);
}
else
{
step = &((*step)->next);
}
}
while (e->y0 <= scan_y_bottom)
{
if (e->y0 != e->y1)
{
stbtt__active_edge *z = stbtt__new_active(&hh, e, off_x, scan_y_top, userdata);
if (z != (null))
{
if (((j) == (0)) && (off_y != 0))
{
if ((z->ey) < (scan_y_top))
{
z->ey = scan_y_top;
}
}
z->next = active;
active = z;
}
}
++e;
}
if ((active) != null)
{
stbtt__fill_active_edges_new(scanline, scanline2 + 1, result->w, active, scan_y_top);
}
{
float sum = 0;
for (i = 0; (i) < (result->w); ++i)
{
float k = 0;
int m = 0;
sum += scanline2[i];
k = scanline[i] + sum;
k = CRuntime.Fabs(k) * 255 + 0.5f;
m = ((int)(k));
if ((m) > (255))
{
m = 255;
}
result->pixels[j * result->stride + i] = ((byte)(m));
}
}
step = &active;
while ((*step) != null)
{
stbtt__active_edge *z = *step;
z->fx += z->fdx;
step = &((*step)->next);
}
++y;
++j;
}
stbtt__hheap_cleanup(&hh, userdata);
if (scanline != scanline_data)
{
CRuntime.Free(scanline);
}
}
public static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e, int n, int vsubsample,
int off_x, int off_y, void *userdata)
{
var hh = new stbtt__hheap();
stbtt__active_edge *active = null;
var y = 0;
var j = 0;
var i = 0;
var scanline_data = stackalloc float[129];
float *scanline;
float *scanline2;
if (result->w > 64)
{
scanline = (float *)CRuntime.malloc((ulong)((result->w * 2 + 1) * sizeof(float)));
}
else
{
scanline = scanline_data;
}
scanline2 = scanline + result->w;
y = off_y;
e[n].y0 = (float)(off_y + result->h) + 1;
while (j < result->h)
{
var scan_y_top = y + 0.0f;
var scan_y_bottom = y + 1.0f;
var step = &active;
CRuntime.memset(scanline, 0, (ulong)(result->w * sizeof(float)));
CRuntime.memset(scanline2, 0, (ulong)((result->w + 1) * sizeof(float)));
while (*step != null)
{
var z = *step;
if (z->ey <= scan_y_top)
{
*step = z->next;
z->direction = 0;
stbtt__hheap_free(&hh, z);
}
else
{
step = &(*step)->next;
}
}
while (e->y0 <= scan_y_bottom)
{
if (e->y0 != e->y1)
{
var z = stbtt__new_active(&hh, e, off_x, scan_y_top, userdata);
if (z != null)
{
if (j == 0 && off_y != 0)
{
if (z->ey < scan_y_top)
{
z->ey = scan_y_top;
}
}
z->next = active;
active = z;
}
}
++e;
}
if (active != null)
{
stbtt__fill_active_edges_new(scanline, scanline2 + 1, result->w, active, scan_y_top);
}
{
float sum = 0;
for (i = 0; i < result->w; ++i)
{
float k = 0;
var m = 0;
sum += scanline2[i];
k = scanline[i] + sum;
k = CRuntime.fabs(k) * 255 + 0.5f;
m = (int)k;
if (m > 255)
{
m = 255;
}
result->pixels[j * result->stride + i] = (byte)m;
}
}
step = &active;
while (*step != null)
{
var z = *step;
z->fx += z->fdx;
step = &(*step)->next;
}
++y;
++j;
}
stbtt__hheap_cleanup(&hh, userdata);
if (scanline != scanline_data)
{
CRuntime.free(scanline);
}
}
