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__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 int stbtt_PackFontRanges(stbtt_pack_context spc, byte *fontdata, int font_index, stbtt_pack_range *ranges, int num_ranges)
{
stbtt_fontinfo info = new stbtt_fontinfo();
int i = 0;
int j = 0;
int n = 0;
int return_value = (int)(1);
stbrp_rect * rects;
for (i = (int)(0); (i) < (num_ranges); ++i)
{
for (j = (int)(0); (j) < (ranges[i].num_chars); ++j)
{
ranges[i].chardata_for_range[j].x0 = (ushort)(ranges[i].chardata_for_range[j].y0 = (ushort)(ranges[i].chardata_for_range[j].x1 = (ushort)(ranges[i].chardata_for_range[j].y1 = (ushort)(0))));
}
}
n = (int)(0);
for (i = (int)(0); (i) < (num_ranges); ++i)
{
n += (int)(ranges[i].num_chars);
}
rects = (stbrp_rect *)(CRuntime.malloc((ulong)(sizeof(stbrp_rect) * n)));
if ((rects) == (null))
{
return((int)(0));
}
info.userdata = spc.user_allocator_context;
stbtt_InitFont(info, fontdata, (int)(stbtt_GetFontOffsetForIndex(fontdata, (int)(font_index))));
n = (int)(stbtt_PackFontRangesGatherRects(spc, info, ranges, (int)(num_ranges), rects));
stbtt_PackFontRangesPackRects(spc, rects, (int)(n));
return_value = (int)(stbtt_PackFontRangesRenderIntoRects(spc, info, ranges, (int)(num_ranges), rects));
CRuntime.free(rects);
return((int)(return_value));
}
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__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);
}
/// <summary>
/// Creates and initializes a font from ttf/otf/ttc data
/// </summary>
/// <param name="data"></param>
/// <param name="offset"></param>
/// <returns>null if the data was invalid</returns>
public static stbtt_fontinfo CreateFont(byte[] data, int offset)
{
var dataCopy = (byte *)CRuntime.malloc(data.Length);
Marshal.Copy(data, 0, new IntPtr(dataCopy), data.Length);
var info = new stbtt_fontinfo
{
isDataCopy = true
};
if (stbtt_InitFont_internal(info, dataCopy, offset) == 0)
{
info.Dispose();
return(null);
}
return(info);
}
public static int stbtt_PackBegin(stbtt_pack_context spc, byte *pixels, int pw, int ph, int stride_in_bytes,
int padding, void *alloc_context)
{
var context = (stbrp_context *)CRuntime.malloc((ulong)sizeof(stbrp_context));
var num_nodes = pw - padding;
var nodes = (stbrp_node *)CRuntime.malloc((ulong)(sizeof(stbrp_node) * num_nodes));
if (context == null || nodes == null)
{
if (context != null)
{
CRuntime.free(context);
}
if (nodes != null)
{
CRuntime.free(nodes);
}
return(0);
}
spc.user_allocator_context = alloc_context;
spc.width = pw;
spc.height = ph;
spc.pixels = pixels;
spc.pack_info = context;
spc.nodes = nodes;
spc.padding = padding;
spc.stride_in_bytes = stride_in_bytes != 0 ? stride_in_bytes : pw;
spc.h_oversample = 1;
spc.v_oversample = 1;
spc.skip_missing = 0;
stbrp_init_target(context, pw - padding, ph - padding, nodes, num_nodes);
if (pixels != null)
{
CRuntime.memset(pixels, 0, (ulong)(pw * ph));
}
return(1);
}
public static int stbtt_PackFontRanges(stbtt_pack_context spc, byte *fontdata, int font_index,
stbtt_pack_range *ranges, int num_ranges)
{
var info = new stbtt_fontinfo();
var i = 0;
var j = 0;
var n = 0;
var return_value = 1;
stbrp_rect *rects;
for (i = 0; i < num_ranges; ++i)
{
for (j = 0; j < ranges[i].num_chars; ++j)
{
ranges[i].chardata_for_range[j].x0 = ranges[i].chardata_for_range[j].y0 =
ranges[i].chardata_for_range[j].x1 = ranges[i].chardata_for_range[j].y1 = 0;
}
}
n = 0;
for (i = 0; i < num_ranges; ++i)
{
n += ranges[i].num_chars;
}
rects = (stbrp_rect *)CRuntime.malloc((ulong)(sizeof(stbrp_rect) * n));
if (rects == null)
{
return(0);
}
info.userdata = spc.user_allocator_context;
stbtt_InitFont(info, fontdata, stbtt_GetFontOffsetForIndex(fontdata, font_index));
n = stbtt_PackFontRangesGatherRects(spc, info, ranges, num_ranges, rects);
stbtt_PackFontRangesPackRects(spc, rects, n);
return_value = stbtt_PackFontRangesRenderIntoRects(spc, info, ranges, num_ranges, rects);
CRuntime.free(rects);
return(return_value);
}
public static int stbtt_PackBegin(stbtt_pack_context spc, byte *pixels, int pw, int ph, int stride_in_bytes, int padding, void *alloc_context)
{
stbrp_context *context = (stbrp_context *)(CRuntime.malloc((ulong)(sizeof(stbrp_context))));
int num_nodes = (int)(pw - padding);
stbrp_node * nodes = (stbrp_node *)(CRuntime.malloc((ulong)(sizeof(stbrp_node) * num_nodes)));
if (((context) == (null)) || ((nodes) == (null)))
{
if (context != (null))
{
CRuntime.free(context);
}
if (nodes != (null))
{
CRuntime.free(nodes);
}
return((int)(0));
}
spc.user_allocator_context = alloc_context;
spc.width = (int)(pw);
spc.height = (int)(ph);
spc.pixels = pixels;
spc.pack_info = context;
spc.nodes = nodes;
spc.padding = (int)(padding);
spc.stride_in_bytes = (int)(stride_in_bytes != 0 ? stride_in_bytes : pw);
spc.h_oversample = (uint)(1);
spc.v_oversample = (uint)(1);
spc.skip_missing = (int)(0);
stbrp_init_target(context, (int)(pw - padding), (int)(ph - padding), nodes, (int)(num_nodes));
if ((pixels) != null)
{
CRuntime.memset(pixels, (int)(0), (ulong)(pw * ph));
}
return((int)(1));
}
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 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);
}
}
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 = (int)(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 = (int)(off_y);
e[n].y0 = (float)((float)(off_y + result->h) + 1);
while ((j) < (result->h))
{
float scan_y_top = (float)(y + 0.0f);
float scan_y_bottom = (float)(y + 1.0f);
stbtt__active_edge **step = &active;
CRuntime.memset(scanline, (int)(0), (ulong)(result->w * sizeof(float)));
CRuntime.memset(scanline2, (int)(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 = (float)(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, (int)(off_x), (float)(scan_y_top), userdata);
if (z != (null))
{
if (((j) == (0)) && (off_y != 0))
{
if ((z->ey) < (scan_y_top))
{
z->ey = (float)(scan_y_top);
}
}
z->next = active;
active = z;
}
}
++e;
}
if ((active) != null)
{
stbtt__fill_active_edges_new(scanline, scanline2 + 1, (int)(result->w), active, (float)(scan_y_top));
}
{
float sum = (float)(0);
for (i = (int)(0); (i) < (result->w); ++i)
{
float k = 0;
int m = 0;
sum += (float)(scanline2[i]);
k = (float)(scanline[i] + sum);
k = (float)((float)(CRuntime.fabs((double)(k))) * 255 + 0.5f);
m = ((int)(k));
if ((m) > (255))
{
m = (int)(255);
}
result->pixels[j * result->stride + i] = ((byte)(m));
}
}
step = &active;
while ((*step) != null)
{
stbtt__active_edge *z = *step;
z->fx += (float)(z->fdx);
step = &((*step)->next);
}
++y;
++j;
}
stbtt__hheap_cleanup(&hh, userdata);
if (scanline != scanline_data)
{
CRuntime.free(scanline);
}
}
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);
}