public static void stbtt_setvertex(stbtt_vertex *v, byte type, int x, int y, int cx, int cy)
{
v->type = type;
v->x = (short)x;
v->y = (short)y;
v->cx = (short)cx;
v->cy = (short)cy;
}
public static void stbtt_setvertex(stbtt_vertex *v, byte type, int x, int y, int cx, int cy)
{
v->type = type;
v->x = ((short)(x));
v->y = ((short)(y));
v->cx = ((short)(cx));
v->cy = ((short)(cy));
}
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 stbtt__point *stbtt_FlattenCurves(stbtt_vertex *vertices, int num_verts, float objspace_flatness,
int **contour_lengths, int *num_contours, void *userdata)
{
stbtt__point *points = null;
var num_points = 0;
var objspace_flatness_squared = objspace_flatness * objspace_flatness;
var i = 0;
var n = 0;
var start = 0;
var pass = 0;
for (i = 0; i < num_verts; ++i)
{
if (vertices[i].type == STBTT_vmove)
{
++n;
}
}
*num_contours = n;
if (n == 0)
{
return(null);
}
*contour_lengths = (int *)CRuntime.malloc((ulong)(sizeof(int) * n));
if (*contour_lengths == null)
{
*num_contours = 0;
return(null);
}
for (pass = 0; pass < 2; ++pass)
{
float x = 0;
float y = 0;
if (pass == 1)
{
points = (stbtt__point *)CRuntime.malloc((ulong)(num_points * sizeof(stbtt__point)));
if (points == null)
{
goto error;
}
}
num_points = 0;
n = -1;
for (i = 0; i < num_verts; ++i)
{
switch (vertices[i].type)
{
case STBTT_vmove:
if (n >= 0)
{
(*contour_lengths)[n] = num_points - start;
}
++n;
start = num_points;
x = vertices[i].x;
y = vertices[i].y;
stbtt__add_point(points, num_points++, x, y);
break;
case STBTT_vline:
x = vertices[i].x;
y = vertices[i].y;
stbtt__add_point(points, num_points++, x, y);
break;
case STBTT_vcurve:
stbtt__tesselate_curve(points, &num_points, x, y, vertices[i].cx, vertices[i].cy,
vertices[i].x, vertices[i].y, objspace_flatness_squared, 0);
x = vertices[i].x;
y = vertices[i].y;
break;
case STBTT_vcubic:
stbtt__tesselate_cubic(points, &num_points, x, y, vertices[i].cx, vertices[i].cy,
vertices[i].cx1, vertices[i].cy1, vertices[i].x, vertices[i].y,
objspace_flatness_squared, 0);
x = vertices[i].x;
y = vertices[i].y;
break;
}
}
(*contour_lengths)[n] = num_points - start;
}
return(points);
error :;
CRuntime.free(points);
CRuntime.free(*contour_lengths);
*contour_lengths = null;
*num_contours = 0;
return(null);
}
public static int stbtt__compute_crossings_x(float x, float y, int nverts, stbtt_vertex *verts)
{
var i = 0;
var orig = stackalloc float[2];
var ray = stackalloc float[] { 1, 0 };
float y_frac = 0;
var winding = 0;
y_frac = (float)CRuntime.fmod(y, 1.0f);
if (y_frac < 0.01f)
{
y += 0.01f;
}
else if (y_frac > 0.99f)
{
y -= 0.01f;
}
orig[0] = x;
orig[1] = y;
for (i = 0; i < nverts; ++i)
{
if (verts[i].type == STBTT_vline)
{
int x0 = verts[i - 1].x;
int y0 = verts[i - 1].y;
int x1 = verts[i].x;
int y1 = verts[i].y;
if (y > (y0 < y1 ? y0 : y1) && y < (y0 < y1 ? y1 : y0) && x > (x0 < x1 ? x0 : x1))
{
var x_inter = (y - y0) / (y1 - y0) * (x1 - x0) + x0;
if (x_inter < x)
{
winding += y0 < y1 ? 1 : -1;
}
}
}
if (verts[i].type == STBTT_vcurve)
{
int x0 = verts[i - 1].x;
int y0 = verts[i - 1].y;
int x1 = verts[i].cx;
int y1 = verts[i].cy;
int x2 = verts[i].x;
int y2 = verts[i].y;
var ax = x0 < (x1 < x2 ? x1 : x2) ? x0 : x1 < x2 ? x1 : x2;
var ay = y0 < (y1 < y2 ? y1 : y2) ? y0 : y1 < y2 ? y1 : y2;
var by = y0 < (y1 < y2 ? y2 : y1) ? y1 < y2 ? y2 : y1 : y0;
if (y > ay && y < by && x > ax)
{
var q0 = stackalloc float[2];
var q1 = stackalloc float[2];
var q2 = stackalloc float[2];
var hitsArray = new UnsafeArray2D <float>(2, 2);
var hits = (float **)hitsArray;
q0[0] = x0;
q0[1] = y0;
q1[0] = x1;
q1[1] = y1;
q2[0] = x2;
q2[1] = y2;
if (equal(q0, q1) != 0 || equal(q1, q2) != 0)
{
x0 = verts[i - 1].x;
y0 = verts[i - 1].y;
x1 = verts[i].x;
y1 = verts[i].y;
if (y > (y0 < y1 ? y0 : y1) && y < (y0 < y1 ? y1 : y0) && x > (x0 < x1 ? x0 : x1))
{
var x_inter = (y - y0) / (y1 - y0) * (x1 - x0) + x0;
if (x_inter < x)
{
winding += y0 < y1 ? 1 : -1;
}
}
}
else
{
var num_hits = stbtt__ray_intersect_bezier(orig, ray, q0, q1, q2, hits);
if (num_hits >= 1)
{
if (hits[0][0] < 0)
{
winding += hits[0][1] < 0 ? -1 : 1;
}
}
if (num_hits >= 2)
{
if (hits[1][0] < 0)
{
winding += hits[1][1] < 0 ? -1 : 1;
}
}
}
}
}
}
return(winding);
}
public static int stbtt__compute_crossings_x(float x, float y, int nverts, stbtt_vertex *verts)
{
int i = 0;
float *orig = stackalloc float[2];
float *ray = stackalloc float[2];
ray[0] = 1;
ray[1] = 0;
float y_frac = 0;
int winding = 0;
orig[0] = x;
orig[1] = y;
y_frac = ((float)(CRuntime.Fmod(y, 1.0f)));
if ((y_frac) < (0.01f))
{
y += 0.01f;
}
else if ((y_frac) > (0.99f))
{
y -= 0.01f;
}
orig[1] = y;
for (i = 0; (i) < (nverts); ++i)
{
if ((verts[i].type) == (STBTT_vline))
{
int x0 = verts[i - 1].x;
int y0 = verts[i - 1].y;
int x1 = verts[i].x;
int y1 = verts[i].y;
if ((((y) > ((y0) < (y1) ? (y0) : (y1))) && ((y) < ((y0) < (y1) ? (y1) : (y0)))) && ((x) > ((x0) < (x1) ? (x0) : (x1))))
{
float x_inter = (y - y0) / (y1 - y0) * (x1 - x0) + x0;
if ((x_inter) < (x))
{
winding += ((y0) < (y1)) ? 1 : -1;
}
}
}
if ((verts[i].type) == (STBTT_vcurve))
{
int x0 = verts[i - 1].x;
int y0 = verts[i - 1].y;
int x1 = verts[i].cx;
int y1 = verts[i].cy;
int x2 = verts[i].x;
int y2 = verts[i].y;
int ax = (x0) < ((x1) < (x2) ? (x1) : (x2)) ? (x0) : ((x1) < (x2) ? (x1) : (x2));
int ay = (y0) < ((y1) < (y2) ? (y1) : (y2)) ? (y0) : ((y1) < (y2) ? (y1) : (y2));
int by = (y0) < ((y1) < (y2) ? (y2) : (y1)) ? ((y1) < (y2) ? (y2) : (y1)) : (y0);
if ((((y) > (ay)) && ((y) < (by))) && ((x) > (ax)))
{
float *q0 = stackalloc float[2];
float *q1 = stackalloc float[2];
float *q2 = stackalloc float[2];
float *hits = stackalloc float[4];
q0[0] = x0;
q0[1] = y0;
q1[0] = x1;
q1[1] = y1;
q2[0] = x2;
q2[1] = y2;
if (((equal(q0, q1)) != 0) || ((equal(q1, q2)) != 0))
{
x0 = verts[i - 1].x;
y0 = verts[i - 1].y;
x1 = verts[i].x;
y1 = verts[i].y;
if ((((y) > ((y0) < (y1) ? (y0) : (y1))) && ((y) < ((y0) < (y1) ? (y1) : (y0)))) && ((x) > ((x0) < (x1) ? (x0) : (x1))))
{
float x_inter = (y - y0) / (y1 - y0) * (x1 - x0) + x0;
if ((x_inter) < (x))
{
winding += ((y0) < (y1)) ? 1 : -1;
}
}
}
else
{
int num_hits = stbtt__ray_intersect_bezier(orig, ray, q0, q1, q2, hits);
if ((num_hits) >= (1))
{
if ((hits[0]) < (0))
{
winding += (hits[1]) < (0) ? -1 : 1;
}
}
if ((num_hits) >= (2))
{
if ((hits[2]) < (0))
{
winding += (hits[3]) < (0) ? -1 : 1;
}
}
}
}
}
}
return(winding);
}
public static stbtt__point *stbtt_FlattenCurves(stbtt_vertex *vertices, int num_verts, float objspace_flatness, int **contour_lengths, int *num_contours, void *userdata)
{
stbtt__point *points = null;
int num_points = (int)(0);
float objspace_flatness_squared = (float)(objspace_flatness * objspace_flatness);
int i = 0;
int n = (int)(0);
int start = (int)(0);
int pass = 0;
for (i = (int)(0); (i) < (num_verts); ++i)
{
if ((vertices[i].type) == (STBTT_vmove))
{
++n;
}
}
*num_contours = (int)(n);
if ((n) == (0))
{
return(null);
}
*contour_lengths = (int *)(CRuntime.malloc((ulong)(sizeof(int) * n)));
if ((*contour_lengths) == (null))
{
*num_contours = (int)(0);
return(null);
}
for (pass = (int)(0); (pass) < (2); ++pass)
{
float x = (float)(0);
float y = (float)(0);
if ((pass) == (1))
{
points = (stbtt__point *)(CRuntime.malloc((ulong)(num_points * sizeof(stbtt__point))));
if ((points) == (null))
{
goto error;
}
}
num_points = (int)(0);
n = (int)(-1);
for (i = (int)(0); (i) < (num_verts); ++i)
{
switch (vertices[i].type)
{
case STBTT_vmove:
if ((n) >= (0))
{
(*contour_lengths)[n] = (int)(num_points - start);
}
++n;
start = (int)(num_points);
x = (float)(vertices[i].x);
y = (float)(vertices[i].y);
stbtt__add_point(points, (int)(num_points++), (float)(x), (float)(y));
break;
case STBTT_vline:
x = (float)(vertices[i].x);
y = (float)(vertices[i].y);
stbtt__add_point(points, (int)(num_points++), (float)(x), (float)(y));
break;
case STBTT_vcurve:
stbtt__tesselate_curve(points, &num_points, (float)(x), (float)(y), (float)(vertices[i].cx), (float)(vertices[i].cy), (float)(vertices[i].x), (float)(vertices[i].y), (float)(objspace_flatness_squared), (int)(0));
x = (float)(vertices[i].x);
y = (float)(vertices[i].y);
break;
case STBTT_vcubic:
stbtt__tesselate_cubic(points, &num_points, (float)(x), (float)(y), (float)(vertices[i].cx), (float)(vertices[i].cy), (float)(vertices[i].cx1), (float)(vertices[i].cy1), (float)(vertices[i].x), (float)(vertices[i].y), (float)(objspace_flatness_squared), (int)(0));
x = (float)(vertices[i].x);
y = (float)(vertices[i].y);
break;
}
}
(*contour_lengths)[n] = (int)(num_points - start);
}
return(points);
error:
;
CRuntime.free(points);
CRuntime.free(*contour_lengths);
*contour_lengths = null;
*num_contours = (int)(0);
return(null);
}
