public static int stbi_write_hdr_core(StbiWriteContext s, int x, int y, int comp, float *data)
{
if ((y <= 0) || (x <= 0) || (data == null))
{
return(0);
}
var scratch = (byte *)(CRuntime.Malloc((ulong)(x * 4)));
int i;
var header = "#?RADIANCE\n# Written by stb_image_write.h\nFORMAT=32-bit_rle_rgbe\n";
var bytes = Encoding.UTF8.GetBytes(header);
fixed(byte *ptr = bytes)
{
s.Func(s.Context, ((sbyte *)ptr), bytes.Length);
}
var str = string.Format("EXPOSURE= 1.0000000000000\n\n-Y {0} +X {1}\n", y, x);
bytes = Encoding.UTF8.GetBytes(str);
fixed(byte *ptr = bytes)
{
s.Func(s.Context, ((sbyte *)ptr), bytes.Length);
}
for (i = 0; i < y; i++)
{
stbiw__write_hdr_scanline(s, x, comp, scratch, data + comp * i * x);
}
CRuntime.Free(scratch);
return(1);
}
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 *stbi__do_png(StbiPng p, int *x, int *y, int *n, int reqComp, StbiResultInfo *ri)
{
void *result = null;
if (reqComp < 0 || reqComp > 4)
{
return((byte *)(ulong)(stbi__err("bad req_comp") != 0 ? (byte *)null : null));
}
if (stbi__parse_png_file(p, STBI_SCAN_LOAD, reqComp) != 0)
{
if (p.Depth < 8)
{
ri->bits_per_channel = 8;
}
else
{
ri->bits_per_channel = p.Depth;
}
result = p.Out;
p.Out = null;
if (reqComp != 0 && reqComp != p.S.ImgOutN)
{
if (ri->bits_per_channel == 8)
{
result = stbi__convert_format((byte *)result, p.S.ImgOutN, reqComp, p.S.ImgX, p.S.ImgY);
}
else
{
result = stbi__convert_format16((ushort *)result, p.S.ImgOutN, reqComp, p.S.ImgX,
p.S.ImgY);
}
p.S.ImgOutN = reqComp;
if (result == null)
{
return(result);
}
}
*x = (int)p.S.ImgX;
*y = (int)p.S.ImgY;
if (n != null)
{
*n = p.S.ImgN;
}
}
CRuntime.Free(p.Out);
p.Out = null;
CRuntime.Free(p.Expanded);
p.Expanded = null;
CRuntime.Free(p.Idata);
p.Idata = null;
return(result);
}
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 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, 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 byte *stbi__convert_16_to_8(ushort *orig, int w, int h, int channels)
{
var i = 0;
var img_len = w * h * channels;
byte *reduced;
reduced = (byte *)stbi__malloc((ulong)img_len);
if (reduced == null)
{
return((byte *)(ulong)(stbi__err("outofmem") != 0 ? (byte *)null : null));
}
for (i = 0; i < img_len; ++i)
{
reduced[i] = (byte)((orig[i] >> 8) & 0xFF);
}
CRuntime.Free(orig);
return(reduced);
}
public static ushort *stbi__convert_8_to_16(byte *orig, int w, int h, int channels)
{
var i = 0;
var img_len = w * h * channels;
ushort *enlarged;
enlarged = (ushort *)stbi__malloc((ulong)(img_len * 2));
if (enlarged == null)
{
return((ushort *)(byte *)(ulong)(stbi__err("outofmem") != 0 ? (byte *)null : null));
}
for (i = 0; i < img_len; ++i)
{
enlarged[i] = (ushort)((orig[i] << 8) + orig[i]);
}
CRuntime.Free(orig);
return(enlarged);
}
public static int stbi__expand_png_palette(StbiPng a, byte *palette, int len, int palImgN)
{
uint i = 0;
var pixel_count = a.S.ImgX * a.S.ImgY;
byte *p;
byte *temp_out;
var orig = a.Out;
p = (byte *)stbi__malloc_mad2((int)pixel_count, palImgN, 0);
if (p == null)
{
return(stbi__err("outofmem"));
}
temp_out = p;
if (palImgN == 3)
{
for (i = (uint)0; i < pixel_count; ++i)
{
var n = orig[i] * 4;
p[0] = palette[n];
p[1] = palette[n + 1];
p[2] = palette[n + 2];
p += 3;
}
}
else
{
for (i = (uint)0; i < pixel_count; ++i)
{
var n = orig[i] * 4;
p[0] = palette[n];
p[1] = palette[n + 1];
p[2] = palette[n + 2];
p[3] = palette[n + 3];
p += 4;
}
}
CRuntime.Free(a.Out);
a.Out = temp_out;
return(1);
}
public void Dispose()
{
if (Pal != null)
{
CRuntime.Free(Pal);
Pal = null;
}
if (Lpal != null)
{
CRuntime.Free(Lpal);
Lpal = null;
}
if (Codes != null)
{
CRuntime.Free(Codes);
Codes = null;
}
}
public static int stbi_write_png_to_func(WriteCallback func,
void *context,
int x,
int y,
int comp,
void *data,
int strideBytes
)
{
int len;
var png = stbi_write_png_to_mem((byte *)(data), strideBytes, x, y, comp, &len);
if (png == null)
{
return(0);
}
func(context, png, len);
CRuntime.Free(png);
return(1);
}
public static sbyte *stbi_zlib_decode_malloc_guesssize(sbyte *buffer, int len, int initialSize, int *outlen)
{
var a = new StbiZbuf();
var p = (sbyte *)stbi__malloc((ulong)initialSize);
if (p == null)
{
return(null);
}
a.zbuffer = (byte *)buffer;
a.zbuffer_end = (byte *)buffer + len;
if (stbi__do_zlib(&a, p, initialSize, 1, 1) != 0)
{
if (outlen != null)
{
*outlen = (int)(a.zout - a.zout_start);
}
return(a.zout_start);
}
CRuntime.Free(a.zout_start);
return(null);
}
public static unsafe ImageResult FromStream(Stream stream,
ColorComponents requiredComponents = ColorComponents.Default)
{
byte *result = null;
try
{
int x, y, comp;
var context = new StbImage.StbiContext(stream);
result = StbImage.stbi__load_and_postprocess_8bit(context, &x, &y, &comp, (int)requiredComponents);
return(FromResult(result, x, y, (ColorComponents)comp, requiredComponents));
}
finally
{
if (result != null)
{
CRuntime.Free(result);
}
}
}
public static sbyte *stbi_zlib_decode_noheader_malloc(sbyte *buffer, int len, int *outlen)
{
var a = new StbiZbuf();
var p = (sbyte *)stbi__malloc((ulong)16384);
if (p == null)
{
return(null);
}
a.zbuffer = (byte *)buffer;
a.zbuffer_end = (byte *)buffer + len;
if (stbi__do_zlib(&a, p, 16384, 1, 0) != 0)
{
if (outlen != null)
{
*outlen = (int)(a.zout - a.zout_start);
}
return(a.zout_start);
}
CRuntime.Free(a.zout_start);
return(null);
}
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 void stbtt_PackEnd(stbtt_pack_context spc)
{
CRuntime.Free(spc.nodes);
CRuntime.Free(spc.pack_info);
}
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 int stbi__parse_png_file(StbiPng z, int scan, int reqComp)
{
var palette = stackalloc byte[1024];
var pal_img_n = (byte)0;
var has_trans = (byte)0;
var tc = stackalloc byte[3];
tc[0] = 0;
var tc16 = stackalloc ushort[3];
var ioff = (uint)0;
var idata_limit = (uint)0;
uint i = 0;
var pal_len = (uint)0;
var first = 1;
var k = 0;
var interlace = 0;
var color = 0;
var is_iphone = 0;
var s = z.S;
z.Expanded = null;
z.Idata = null;
z.Out = null;
if (stbi__check_png_header(s) == 0)
{
return(0);
}
if (scan == STBI_SCAN_TYPE)
{
return(1);
}
for (; ;)
{
var c = stbi__get_chunk_header(s);
switch (c.type)
{
case ((uint)'C' << 24) + ((uint)'g' << 16) + ((uint)'B' << 8) + 'I':
is_iphone = 1;
stbi__skip(s, (int)c.length);
break;
case ((uint)'I' << 24) + ((uint)'H' << 16) + ((uint)'D' << 8) + 'R':
{
var comp = 0;
var filter = 0;
if (first == 0)
{
return(stbi__err("multiple IHDR"));
}
first = 0;
if (c.length != 13)
{
return(stbi__err("bad IHDR len"));
}
s.ImgX = stbi__get32be(s);
if (s.ImgX > 1 << 24)
{
return(stbi__err("too large"));
}
s.ImgY = stbi__get32be(s);
if (s.ImgY > 1 << 24)
{
return(stbi__err("too large"));
}
z.Depth = stbi__get8(s);
if (z.Depth != 1 && z.Depth != 2 && z.Depth != 4 && z.Depth != 8 && z.Depth != 16)
{
return(stbi__err("1/2/4/8/16-bit only"));
}
color = stbi__get8(s);
if (color > 6)
{
return(stbi__err("bad ctype"));
}
if (color == 3 && z.Depth == 16)
{
return(stbi__err("bad ctype"));
}
if (color == 3)
{
pal_img_n = 3;
}
else if ((color & 1) != 0)
{
return(stbi__err("bad ctype"));
}
comp = stbi__get8(s);
if (comp != 0)
{
return(stbi__err("bad comp method"));
}
filter = stbi__get8(s);
if (filter != 0)
{
return(stbi__err("bad filter method"));
}
interlace = stbi__get8(s);
if (interlace > 1)
{
return(stbi__err("bad interlace method"));
}
if (s.ImgX == 0 || s.ImgY == 0)
{
return(stbi__err("0-pixel image"));
}
if (pal_img_n == 0)
{
s.ImgN = ((color & 2) != 0 ? 3 : 1) + ((color & 4) != 0 ? 1 : 0);
if ((1 << 30) / s.ImgX / s.ImgN < s.ImgY)
{
return(stbi__err("too large"));
}
if (scan == STBI_SCAN_HEADER)
{
return(1);
}
}
else
{
s.ImgN = 1;
if ((1 << 30) / s.ImgX / 4 < s.ImgY)
{
return(stbi__err("too large"));
}
}
break;
}
case ((uint)'P' << 24) + ((uint)'L' << 16) + ((uint)'T' << 8) + 'E':
{
if (first != 0)
{
return(stbi__err("first not IHDR"));
}
if (c.length > 256 * 3)
{
return(stbi__err("invalid PLTE"));
}
pal_len = c.length / 3;
if (pal_len * 3 != c.length)
{
return(stbi__err("invalid PLTE"));
}
for (i = (uint)0; i < pal_len; ++i)
{
palette[i * 4 + 0] = stbi__get8(s);
palette[i * 4 + 1] = stbi__get8(s);
palette[i * 4 + 2] = stbi__get8(s);
palette[i * 4 + 3] = 255;
}
break;
}
case ((uint)'t' << 24) + ((uint)'R' << 16) + ((uint)'N' << 8) + 'S':
{
if (first != 0)
{
return(stbi__err("first not IHDR"));
}
if (z.Idata != null)
{
return(stbi__err("tRNS after IDAT"));
}
if (pal_img_n != 0)
{
if (scan == STBI_SCAN_HEADER)
{
s.ImgN = 4;
return(1);
}
if (pal_len == 0)
{
return(stbi__err("tRNS before PLTE"));
}
if (c.length > pal_len)
{
return(stbi__err("bad tRNS len"));
}
pal_img_n = 4;
for (i = (uint)0; i < c.length; ++i)
{
palette[i * 4 + 3] = stbi__get8(s);
}
}
else
{
if ((s.ImgN & 1) == 0)
{
return(stbi__err("tRNS with alpha"));
}
if (c.length != (uint)s.ImgN * 2)
{
return(stbi__err("bad tRNS len"));
}
has_trans = 1;
if (z.Depth == 16)
{
for (k = 0; k < s.ImgN; ++k)
{
tc16[k] = (ushort)stbi__get16be(s);
}
}
else
{
for (k = 0; k < s.ImgN; ++k)
{
tc[k] = (byte)((byte)(stbi__get16be(s) & 255) * StbiDepthScaleTable[z.Depth]);
}
}
}
break;
}
case ((uint)'I' << 24) + ((uint)'D' << 16) + ((uint)'A' << 8) + 'T':
{
if (first != 0)
{
return(stbi__err("first not IHDR"));
}
if (pal_img_n != 0 && pal_len == 0)
{
return(stbi__err("no PLTE"));
}
if (scan == STBI_SCAN_HEADER)
{
s.ImgN = pal_img_n;
return(1);
}
if ((int)(ioff + c.length) < (int)ioff)
{
return(0);
}
if (ioff + c.length > idata_limit)
{
var idata_limit_old = idata_limit;
byte *p;
if (idata_limit == 0)
{
idata_limit = c.length > 4096 ? c.length : 4096;
}
while (ioff + c.length > idata_limit)
{
idata_limit *= 2;
}
p = (byte *)CRuntime.Realloc(z.Idata, (ulong)idata_limit);
if (p == null)
{
return(stbi__err("outofmem"));
}
z.Idata = p;
}
if (stbi__getn(s, z.Idata + ioff, (int)c.length) == 0)
{
return(stbi__err("outofdata"));
}
ioff += c.length;
break;
}
case ((uint)'I' << 24) + ((uint)'E' << 16) + ((uint)'N' << 8) + 'D':
{
uint raw_len = 0;
uint bpl = 0;
if (first != 0)
{
return(stbi__err("first not IHDR"));
}
if (scan != STBI_SCAN_LOAD)
{
return(1);
}
if (z.Idata == null)
{
return(stbi__err("no IDAT"));
}
bpl = (uint)((s.ImgX * z.Depth + 7) / 8);
raw_len = (uint)(bpl * s.ImgY * s.ImgN + s.ImgY);
z.Expanded = (byte *)stbi_zlib_decode_malloc_guesssize_headerflag((sbyte *)z.Idata, (int)ioff,
(int)raw_len, (int *)&raw_len, is_iphone != 0 ? 0 : 1);
if (z.Expanded == null)
{
return(0);
}
CRuntime.Free(z.Idata);
z.Idata = null;
if (reqComp == s.ImgN + 1 && reqComp != 3 && pal_img_n == 0 || has_trans != 0)
{
s.ImgOutN = s.ImgN + 1;
}
else
{
s.ImgOutN = s.ImgN;
}
if (stbi__create_png_image(z, z.Expanded, raw_len, s.ImgOutN, z.Depth, color, interlace) == 0)
{
return(0);
}
if (has_trans != 0)
{
if (z.Depth == 16)
{
if (stbi__compute_transparency16(z, tc16, s.ImgOutN) == 0)
{
return(0);
}
}
else
{
if (stbi__compute_transparency(z, tc, s.ImgOutN) == 0)
{
return(0);
}
}
}
if (is_iphone != 0 && StbiDeIphoneFlag != 0 && s.ImgOutN > 2)
{
stbi__de_iphone(z);
}
if (pal_img_n != 0)
{
s.ImgN = pal_img_n;
s.ImgOutN = pal_img_n;
if (reqComp >= 3)
{
s.ImgOutN = reqComp;
}
if (stbi__expand_png_palette(z, palette, (int)pal_len, s.ImgOutN) == 0)
{
return(0);
}
}
else if (has_trans != 0)
{
++s.ImgN;
}
CRuntime.Free(z.Expanded);
z.Expanded = null;
return(1);
}
default:
if (first != 0)
{
return(stbi__err("first not IHDR"));
}
if ((c.type & (1 << 29)) == 0)
{
var invalid_chunk = c.type + " PNG chunk not known";
return(stbi__err(invalid_chunk));
}
stbi__skip(s, (int)c.length);
break;
}
stbi__get32be(s);
}
}
public static int stbi__create_png_image(StbiPng a, byte *imageData, uint imageDataLen, int outN,
int depth, int color, int interlaced)
{
var bytes = depth == 16 ? 2 : 1;
var out_bytes = outN * bytes;
byte *final;
var p = 0;
if (interlaced == 0)
{
return(stbi__create_png_image_raw(a, imageData, imageDataLen, outN, a.S.ImgX, a.S.ImgY, depth,
color));
}
final = (byte *)stbi__malloc_mad3((int)a.S.ImgX, (int)a.S.ImgY, out_bytes, 0);
for (p = 0; p < 7; ++p)
{
var xorig = stackalloc int[7];
xorig[0] = 0;
xorig[1] = 4;
xorig[2] = 0;
xorig[3] = 2;
xorig[4] = 0;
xorig[5] = 1;
xorig[6] = 0;
var yorig = stackalloc int[7];
yorig[0] = 0;
yorig[1] = 0;
yorig[2] = 4;
yorig[3] = 0;
yorig[4] = 2;
yorig[5] = 0;
yorig[6] = 1;
var xspc = stackalloc int[7];
xspc[0] = 8;
xspc[1] = 8;
xspc[2] = 4;
xspc[3] = 4;
xspc[4] = 2;
xspc[5] = 2;
xspc[6] = 1;
var yspc = stackalloc int[7];
yspc[0] = 8;
yspc[1] = 8;
yspc[2] = 8;
yspc[3] = 4;
yspc[4] = 4;
yspc[5] = 2;
yspc[6] = 2;
var i = 0;
var j = 0;
var x = 0;
var y = 0;
x = (int)((a.S.ImgX - xorig[p] + xspc[p] - 1) / xspc[p]);
y = (int)((a.S.ImgY - yorig[p] + yspc[p] - 1) / yspc[p]);
if (x != 0 && y != 0)
{
var img_len = (uint)((((a.S.ImgN * x * depth + 7) >> 3) + 1) * y);
if (stbi__create_png_image_raw(a, imageData, imageDataLen, outN, (uint)x, (uint)y, depth,
color) == 0)
{
CRuntime.Free(final);
return(0);
}
for (j = 0; j < y; ++j)
{
for (i = 0; i < x; ++i)
{
var out_y = j * yspc[p] + yorig[p];
var out_x = i * xspc[p] + xorig[p];
CRuntime.Memcpy(final + out_y * a.S.ImgX * out_bytes + out_x * out_bytes,
a.Out + (j * x + i) * out_bytes, (ulong)out_bytes);
}
}
CRuntime.Free(a.Out);
imageData += img_len;
imageDataLen -= img_len;
}
}
a.Out = final;
return(1);
}
public static void *stbi__bmp_load(StbiContext s, int *x, int *y, int *comp, int reqComp,
StbiResultInfo *ri)
{
byte *out_;
var mr = (uint)0;
var mg = (uint)0;
var mb = (uint)0;
var ma = (uint)0;
uint all_a = 0;
var pal = stackalloc byte[256 * 4];
var psize = 0;
var i = 0;
var j = 0;
var width = 0;
var flip_vertically = 0;
var pad = 0;
var target = 0;
var info = new StbiBmpData();
info.all_a = 255;
if (stbi__bmp_parse_header(s, &info) == null)
{
return(null);
}
flip_vertically = (int)s.ImgY > 0 ? 1 : 0;
s.ImgY = (uint)CRuntime.Abs((int)s.ImgY);
mr = info.mr;
mg = info.mg;
mb = info.mb;
ma = info.ma;
all_a = info.all_a;
if (info.hsz == 12)
{
if (info.bpp < 24)
{
psize = (info.offset - 14 - 24) / 3;
}
}
else
{
if (info.bpp < 16)
{
psize = (info.offset - 14 - info.hsz) >> 2;
}
}
s.ImgN = ma != 0 ? 4 : 3;
if (reqComp != 0 && reqComp >= 3)
{
target = reqComp;
}
else
{
target = s.ImgN;
}
if (stbi__mad3sizes_valid(target, (int)s.ImgX, (int)s.ImgY, 0) == 0)
{
return((byte *)(ulong)(stbi__err("too large") != 0 ? (byte *)null : null));
}
out_ = (byte *)stbi__malloc_mad3(target, (int)s.ImgX, (int)s.ImgY, 0);
if (out_ == null)
{
return((byte *)(ulong)(stbi__err("outofmem") != 0 ? (byte *)null : null));
}
if (info.bpp < 16)
{
var z = 0;
if (psize == 0 || psize > 256)
{
CRuntime.Free(out_);
return((byte *)(ulong)(stbi__err("invalid") != 0 ? (byte *)null : null));
}
for (i = 0; i < psize; ++i)
{
pal[i * 4 + 2] = stbi__get8(s);
pal[i * 4 + 1] = stbi__get8(s);
pal[i * 4 + 0] = stbi__get8(s);
if (info.hsz != 12)
{
stbi__get8(s);
}
pal[i * 4 + 3] = 255;
}
stbi__skip(s, info.offset - 14 - info.hsz - psize * (info.hsz == 12 ? 3 : 4));
if (info.bpp == 1)
{
width = (int)((s.ImgX + 7) >> 3);
}
else if (info.bpp == 4)
{
width = (int)((s.ImgX + 1) >> 1);
}
else if (info.bpp == 8)
{
width = (int)s.ImgX;
}
else
{
CRuntime.Free(out_);
return((byte *)(ulong)(stbi__err("bad bpp") != 0 ? (byte *)null : null));
}
pad = -width & 3;
if (info.bpp == 1)
{
for (j = 0; j < (int)s.ImgY; ++j)
{
var bit_offset = 7;
var v = (int)stbi__get8(s);
for (i = 0; i < (int)s.ImgX; ++i)
{
var color = (v >> bit_offset) & 0x1;
out_[z++] = pal[color * 4 + 0];
out_[z++] = pal[color * 4 + 1];
out_[z++] = pal[color * 4 + 2];
if (target == 4)
{
out_[z++] = 255;
}
if (i + 1 == (int)s.ImgX)
{
break;
}
if (--bit_offset < 0)
{
bit_offset = 7;
v = stbi__get8(s);
}
}
stbi__skip(s, pad);
}
}
else
{
for (j = 0; j < (int)s.ImgY; ++j)
{
for (i = 0; i < (int)s.ImgX; i += 2)
{
var v = (int)stbi__get8(s);
var v2 = 0;
if (info.bpp == 4)
{
v2 = v & 15;
v >>= 4;
}
out_[z++] = pal[v * 4 + 0];
out_[z++] = pal[v * 4 + 1];
out_[z++] = pal[v * 4 + 2];
if (target == 4)
{
out_[z++] = 255;
}
if (i + 1 == (int)s.ImgX)
{
break;
}
v = info.bpp == 8 ? stbi__get8(s) : v2;
out_[z++] = pal[v * 4 + 0];
out_[z++] = pal[v * 4 + 1];
out_[z++] = pal[v * 4 + 2];
if (target == 4)
{
out_[z++] = 255;
}
}
stbi__skip(s, pad);
}
}
}
else
{
var rshift = 0;
var gshift = 0;
var bshift = 0;
var ashift = 0;
var rcount = 0;
var gcount = 0;
var bcount = 0;
var acount = 0;
var z = 0;
var easy = 0;
stbi__skip(s, info.offset - 14 - info.hsz);
if (info.bpp == 24)
{
width = (int)(3 * s.ImgX);
}
else if (info.bpp == 16)
{
width = (int)(2 * s.ImgX);
}
else
{
width = 0;
}
pad = -width & 3;
if (info.bpp == 24)
{
easy = 1;
}
else if (info.bpp == 32)
{
if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 && ma == 0xff000000)
{
easy = 2;
}
}
if (easy == 0)
{
if (mr == 0 || mg == 0 || mb == 0)
{
CRuntime.Free(out_);
return((byte *)(ulong)(stbi__err("bad masks") != 0 ? (byte *)null : null));
}
rshift = stbi__high_bit(mr) - 7;
rcount = stbi__bitcount(mr);
gshift = stbi__high_bit(mg) - 7;
gcount = stbi__bitcount(mg);
bshift = stbi__high_bit(mb) - 7;
bcount = stbi__bitcount(mb);
ashift = stbi__high_bit(ma) - 7;
acount = stbi__bitcount(ma);
}
for (j = 0; j < (int)s.ImgY; ++j)
{
if (easy != 0)
{
for (i = 0; i < (int)s.ImgX; ++i)
{
byte a = 0;
out_[z + 2] = stbi__get8(s);
out_[z + 1] = stbi__get8(s);
out_[z + 0] = stbi__get8(s);
z += 3;
a = (byte)(easy == 2 ? stbi__get8(s) : 255);
all_a |= a;
if (target == 4)
{
out_[z++] = a;
}
}
}
else
{
var bpp = info.bpp;
for (i = 0; i < (int)s.ImgX; ++i)
{
var v = bpp == 16 ? (uint)stbi__get16le(s) : stbi__get32le(s);
uint a = 0;
out_[z++] = (byte)(stbi__shiftsigned(v & mr, rshift, rcount) & 255);
out_[z++] = (byte)(stbi__shiftsigned(v & mg, gshift, gcount) & 255);
out_[z++] = (byte)(stbi__shiftsigned(v & mb, bshift, bcount) & 255);
a = (uint)(ma != 0 ? stbi__shiftsigned(v & ma, ashift, acount) : 255);
all_a |= a;
if (target == 4)
{
out_[z++] = (byte)(a & 255);
}
}
}
stbi__skip(s, pad);
}
}
if (target == 4 && all_a == 0)
{
for (i = (int)(4 * s.ImgX * s.ImgY - 1); i >= 0; i -= 4)
{
out_[i] = 255;
}
}
if (flip_vertically != 0)
{
byte t = 0;
for (j = 0; j < (int)s.ImgY >> 1; ++j)
{
var p1 = out_ + j * s.ImgX * target;
var p2 = out_ + (s.ImgY - 1 - j) * s.ImgX * target;
for (i = 0; i < (int)s.ImgX * target; ++i)
{
t = p1[i];
p1[i] = p2[i];
p2[i] = t;
}
}
}
if (reqComp != 0 && reqComp != target)
{
out_ = stbi__convert_format(out_, target, reqComp, s.ImgX, s.ImgY);
if (out_ == null)
{
return(out_);
}
}
*x = (int)s.ImgX;
*y = (int)s.ImgY;
if (comp != null)
{
*comp = s.ImgN;
}
return(out_);
}
public static ushort *stbi__convert_format16(ushort *data, int imgN, int reqComp, uint x, uint y)
{
var i = 0;
var j = 0;
ushort *good;
if (reqComp == imgN)
{
return(data);
}
good = (ushort *)stbi__malloc((ulong)(reqComp * x * y * 2));
if (good == null)
{
CRuntime.Free(data);
return((ushort *)(byte *)(ulong)(stbi__err("outofmem") != 0 ? (byte *)null : null));
}
for (j = 0; j < (int)y; ++j)
{
var src = data + j * x * imgN;
var dest = good + j * x * reqComp;
switch (imgN * 8 + reqComp)
{
case 1 * 8 + 2:
for (i = (int)(x - 1); i >= 0; --i, src += 1, dest += 2)
{
dest[0] = src[0];
dest[1] = 0xffff;
}
break;
case 1 * 8 + 3:
for (i = (int)(x - 1); i >= 0; --i, src += 1, dest += 3)
{
dest[0] = dest[1] = dest[2] = src[0];
}
break;
case 1 * 8 + 4:
for (i = (int)(x - 1); i >= 0; --i, src += 1, dest += 4)
{
dest[0] = dest[1] = dest[2] = src[0];
dest[3] = 0xffff;
}
break;
case 2 * 8 + 1:
for (i = (int)(x - 1); i >= 0; --i, src += 2, dest += 1)
{
dest[0] = src[0];
}
break;
case 2 * 8 + 3:
for (i = (int)(x - 1); i >= 0; --i, src += 2, dest += 3)
{
dest[0] = dest[1] = dest[2] = src[0];
}
break;
case 2 * 8 + 4:
for (i = (int)(x - 1); i >= 0; --i, src += 2, dest += 4)
{
dest[0] = dest[1] = dest[2] = src[0];
dest[3] = src[1];
}
break;
case 3 * 8 + 4:
for (i = (int)(x - 1); i >= 0; --i, src += 3, dest += 4)
{
dest[0] = src[0];
dest[1] = src[1];
dest[2] = src[2];
dest[3] = 0xffff;
}
break;
case 3 * 8 + 1:
for (i = (int)(x - 1); i >= 0; --i, src += 3, dest += 1)
{
dest[0] = stbi__compute_y_16(src[0], src[1], src[2]);
}
break;
case 3 * 8 + 2:
for (i = (int)(x - 1); i >= 0; --i, src += 3, dest += 2)
{
dest[0] = stbi__compute_y_16(src[0], src[1], src[2]);
dest[1] = 0xffff;
}
break;
case 4 * 8 + 1:
for (i = (int)(x - 1); i >= 0; --i, src += 4, dest += 1)
{
dest[0] = stbi__compute_y_16(src[0], src[1], src[2]);
}
break;
case 4 * 8 + 2:
for (i = (int)(x - 1); i >= 0; --i, src += 4, dest += 2)
{
dest[0] = stbi__compute_y_16(src[0], src[1], src[2]);
dest[1] = src[3];
}
break;
case 4 * 8 + 3:
for (i = (int)(x - 1); i >= 0; --i, src += 4, dest += 3)
{
dest[0] = src[0];
dest[1] = src[1];
dest[2] = src[2];
}
break;
default:
return((ushort *)(byte *)(ulong)(stbi__err("0") != 0 ? (byte *)null : null));
}
}
CRuntime.Free(data);
return(good);
}
public static void stbtt_FreeSDF(byte *bitmap, void *userdata)
{
CRuntime.Free(bitmap);
}
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 = 0;
float objspace_flatness_squared = objspace_flatness * objspace_flatness;
int i = 0;
int n = 0;
int start = 0;
int 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);
}
