public static void *stbi__load_main(stbi__context s, int *x, int *y, int *comp, int req_comp,
stbi__result_info *ri, int bpc)
{
CRuntime.memset(ri, 0, (ulong)sizeof(stbi__result_info));
ri->bits_per_channel = 8;
ri->channel_order = STBI_ORDER_RGB;
ri->num_channels = 0;
if (stbi__png_test(s) != 0)
{
return(stbi__png_load(s, x, y, comp, req_comp, ri));
}
if (stbi__bmp_test(s) != 0)
{
return(stbi__bmp_load(s, x, y, comp, req_comp, ri));
}
if (stbi__gif_test(s) != 0)
{
return(stbi__gif_load(s, x, y, comp, req_comp, ri));
}
if (stbi__psd_test(s) != 0)
{
return(stbi__psd_load(s, x, y, comp, req_comp, ri, bpc));
}
if (stbi__jpeg_test(s) != 0)
{
return(stbi__jpeg_load(s, x, y, comp, req_comp, ri));
}
if (stbi__hdr_test(s) != 0)
{
var hdr = stbi__hdr_load(s, x, y, comp, req_comp, ri);
return(stbi__hdr_to_ldr(hdr, *x, *y, req_comp != 0 ? req_comp : *comp));
}
if (stbi__tga_test(s) != 0)
{
return(stbi__tga_load(s, x, y, comp, req_comp, ri));
}
return((byte *)(ulong)(stbi__err("unknown image type") != 0 ? 0 : 0));
}
public static unsafe ImageResultFloat FromStream(Stream stream,
ColorComponents requiredComponents = ColorComponents.Default)
{
float *result = null;
try
{
int x, y, comp;
var context = new StbImage.stbi__context(stream);
result = StbImage.stbi__loadf_main(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_malloc_guesssize(sbyte *buffer, int len, int initial_size, int *outlen)
{
var a = new stbi__zbuf();
var p = (sbyte *)stbi__malloc((ulong)initial_size);
if (p == null)
{
return(null);
}
a.zbuffer = (byte *)buffer;
a.zbuffer_end = (byte *)buffer + len;
if (stbi__do_zlib(&a, p, initial_size, 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 stbi__context(stream);
result = 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 stbi__zbuf();
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 stbi__zexpand(stbi__zbuf *z, sbyte *zout, int n)
{
sbyte *q;
uint cur = 0;
uint limit = 0;
uint old_limit = 0;
z->zout = zout;
if (z->z_expandable == 0)
{
return(stbi__err("output buffer limit"));
}
cur = (uint)(z->zout - z->zout_start);
limit = old_limit = (uint)(z->zout_end - z->zout_start);
if (0xffffffff - cur < (uint)n)
{
return(stbi__err("outofmem"));
}
while (cur + n > limit)
{
if (limit > 0xffffffff / 2)
{
return(stbi__err("outofmem"));
}
limit *= 2;
}
q = (sbyte *)CRuntime.realloc(z->zout_start, (ulong)limit);
if (q == null)
{
return(stbi__err("outofmem"));
}
z->zout_start = q;
z->zout = q + cur;
z->zout_end = q + limit;
return(1);
}
public static void stbi__vertical_flip(void *image, int w, int h, int bytes_per_pixel)
{
var row = 0;
var bytes_per_row = (ulong)(w * bytes_per_pixel);
var temp = stackalloc byte[2048];
var bytes = (byte *)image;
for (row = 0; row < h >> 1; row++)
{
var row0 = bytes + (ulong)row * bytes_per_row;
var row1 = bytes + (ulong)(h - row - 1) * bytes_per_row;
var bytes_left = bytes_per_row;
while (bytes_left != 0)
{
var bytes_copy = bytes_left < 2048 ? bytes_left : 2048;
CRuntime.memcpy(temp, row0, bytes_copy);
CRuntime.memcpy(row0, row1, bytes_copy);
CRuntime.memcpy(row1, temp, bytes_copy);
row0 += bytes_copy;
row1 += bytes_copy;
bytes_left -= bytes_copy;
}
}
}
public static void *stbi__malloc(ulong size)
{
return(CRuntime.malloc(size));
}
public static ushort *stbi__convert_format16(ushort *data, int img_n, int req_comp, uint x, uint y)
{
var i = 0;
var j = 0;
ushort *good;
if (req_comp == img_n)
{
return(data);
}
good = (ushort *)stbi__malloc((ulong)(req_comp * 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 * img_n;
var dest = good + j * x * req_comp;
switch (img_n * 8 + req_comp)
{
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 int stbi__compute_huffman_codes(stbi__zbuf *a)
{
var z_codelength = new stbi__zhuffman();
var lencodes = stackalloc byte[286 + 32 + 137];
var codelength_sizes = stackalloc byte[19];
var i = 0;
var n = 0;
var hlit = (int)(stbi__zreceive(a, 5) + 257);
var hdist = (int)(stbi__zreceive(a, 5) + 1);
var hclen = (int)(stbi__zreceive(a, 4) + 4);
var ntot = hlit + hdist;
CRuntime.memset(codelength_sizes, 0, (ulong)(19 * sizeof(byte)));
for (i = 0; i < hclen; ++i)
{
var s = (int)stbi__zreceive(a, 3);
codelength_sizes[length_dezigzag[i]] = (byte)s;
}
if (stbi__zbuild_huffman(&z_codelength, codelength_sizes, 19) == 0)
{
return(0);
}
n = 0;
while (n < ntot)
{
var c = stbi__zhuffman_decode(a, &z_codelength);
if (c < 0 || c >= 19)
{
return(stbi__err("bad codelengths"));
}
if (c < 16)
{
lencodes[n++] = (byte)c;
}
else
{
var fill = (byte)0;
if (c == 16)
{
c = (int)(stbi__zreceive(a, 2) + 3);
if (n == 0)
{
return(stbi__err("bad codelengths"));
}
fill = lencodes[n - 1];
}
else if (c == 17)
{
c = (int)(stbi__zreceive(a, 3) + 3);
}
else
{
c = (int)(stbi__zreceive(a, 7) + 11);
}
if (ntot - n < c)
{
return(stbi__err("bad codelengths"));
}
CRuntime.memset(lencodes + n, fill, (ulong)c);
n += c;
}
}
if (n != ntot)
{
return(stbi__err("bad codelengths"));
}
if (stbi__zbuild_huffman(&a->z_length, lencodes, hlit) == 0)
{
return(0);
}
if (stbi__zbuild_huffman(&a->z_distance, lencodes + hlit, hdist) == 0)
{
return(0);
}
return(1);
}
public static int stbi__zbuild_huffman(stbi__zhuffman *z, byte *sizelist, int num)
{
var i = 0;
var k = 0;
var code = 0;
var next_code = stackalloc int[16];
var sizes = stackalloc int[17];
CRuntime.memset(sizes, 0, (ulong)sizeof(int));
CRuntime.memset(z->fast, 0, (ulong)((1 << 9) * sizeof(ushort)));
for (i = 0; i < num; ++i)
{
++sizes[sizelist[i]];
}
sizes[0] = 0;
for (i = 1; i < 16; ++i)
{
if (sizes[i] > 1 << i)
{
return(stbi__err("bad sizes"));
}
}
code = 0;
for (i = 1; i < 16; ++i)
{
next_code[i] = code;
z->firstcode[i] = (ushort)code;
z->firstsymbol[i] = (ushort)k;
code = code + sizes[i];
if (sizes[i] != 0)
{
if (code - 1 >= 1 << i)
{
return(stbi__err("bad codelengths"));
}
}
z->maxcode[i] = code << (16 - i);
code <<= 1;
k += sizes[i];
}
z->maxcode[16] = 0x10000;
for (i = 0; i < num; ++i)
{
var s = (int)sizelist[i];
if (s != 0)
{
var c = next_code[s] - z->firstcode[s] + z->firstsymbol[s];
var fastv = (ushort)((s << 9) | i);
z->size[c] = (byte)s;
z->value[c] = (ushort)i;
if (s <= 9)
{
var j = stbi__bit_reverse(next_code[s], s);
while (j < 1 << 9)
{
z->fast[j] = fastv;
j += 1 << s;
}
}
++next_code[s];
}
}
return(1);
}
public static int stbi__hdr_info(stbi__context s, int *x, int *y, int *comp)
{
var buffer = stackalloc sbyte[1024];
sbyte *token;
var valid = 0;
var dummy = 0;
if (x == null)
{
x = &dummy;
}
if (y == null)
{
y = &dummy;
}
if (comp == null)
{
comp = &dummy;
}
if (stbi__hdr_test(s) == 0)
{
stbi__rewind(s);
return(0);
}
for (; ;)
{
token = stbi__hdr_gettoken(s, buffer);
if (token[0] == 0)
{
break;
}
if (CRuntime.strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0)
{
valid = 1;
}
}
if (valid == 0)
{
stbi__rewind(s);
return(0);
}
token = stbi__hdr_gettoken(s, buffer);
if (CRuntime.strncmp(token, "-Y ", 3) != 0)
{
stbi__rewind(s);
return(0);
}
token += 3;
*y = (int)CRuntime.strtol(token, &token, 10);
while (*token == 32)
{
++token;
}
if (CRuntime.strncmp(token, "+X ", 3) != 0)
{
stbi__rewind(s);
return(0);
}
token += 3;
*x = (int)CRuntime.strtol(token, null, 10);
*comp = 3;
return(1);
}
public static int stbi__create_png_image(stbi__png a, byte *image_data, uint image_data_len, int out_n,
int depth, int color, int interlaced)
{
var bytes = depth == 16 ? 2 : 1;
var out_bytes = out_n * bytes;
byte *final;
var p = 0;
if (interlaced == 0)
{
return(stbi__create_png_image_raw(a, image_data, image_data_len, out_n, a.s.img_x, a.s.img_y, depth,
color));
}
final = (byte *)stbi__malloc_mad3((int)a.s.img_x, (int)a.s.img_y, 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.img_x - xorig[p] + xspc[p] - 1) / xspc[p]);
y = (int)((a.s.img_y - yorig[p] + yspc[p] - 1) / yspc[p]);
if (x != 0 && y != 0)
{
var img_len = (uint)((((a.s.img_n * x * depth + 7) >> 3) + 1) * y);
if (stbi__create_png_image_raw(a, image_data, image_data_len, out_n, (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.img_x * out_bytes + out_x * out_bytes,
a._out_ + (j * x + i) * out_bytes, (ulong)out_bytes);
}
}
CRuntime.free(a._out_);
image_data += img_len;
image_data_len -= img_len;
}
}
a._out_ = final;
return(1);
}
public static int stbi__create_png_image_raw(stbi__png a, byte *raw, uint raw_len, int out_n, uint x, uint y,
int depth, int color)
{
var bytes = depth == 16 ? 2 : 1;
var s = a.s;
uint i = 0;
uint j = 0;
var stride = (uint)(x * out_n * bytes);
uint img_len = 0;
uint img_width_bytes = 0;
var k = 0;
var img_n = s.img_n;
var output_bytes = out_n * bytes;
var filter_bytes = img_n * bytes;
var width = (int)x;
a._out_ = (byte *)stbi__malloc_mad3((int)x, (int)y, output_bytes, 0);
if (a._out_ == null)
{
return(stbi__err("outofmem"));
}
if (stbi__mad3sizes_valid(img_n, (int)x, depth, 7) == 0)
{
return(stbi__err("too large"));
}
img_width_bytes = (uint)((img_n * x * depth + 7) >> 3);
img_len = (img_width_bytes + 1) * y;
if (raw_len < img_len)
{
return(stbi__err("not enough pixels"));
}
for (j = (uint)0; j < y; ++j)
{
var cur = a._out_ + stride * j;
byte *prior;
var filter = (int)*raw++;
if (filter > 4)
{
return(stbi__err("invalid filter"));
}
if (depth < 8)
{
cur += x * out_n - img_width_bytes;
filter_bytes = 1;
width = (int)img_width_bytes;
}
prior = cur - stride;
if (j == 0)
{
filter = first_row_filter[filter];
}
for (k = 0; k < filter_bytes; ++k)
{
switch (filter)
{
case STBI__F_none:
cur[k] = raw[k];
break;
case STBI__F_sub:
cur[k] = raw[k];
break;
case STBI__F_up:
cur[k] = (byte)((raw[k] + prior[k]) & 255);
break;
case STBI__F_avg:
cur[k] = (byte)((raw[k] + (prior[k] >> 1)) & 255);
break;
case STBI__F_paeth:
cur[k] = (byte)((raw[k] + stbi__paeth(0, prior[k], 0)) & 255);
break;
case STBI__F_avg_first:
cur[k] = raw[k];
break;
case STBI__F_paeth_first:
cur[k] = raw[k];
break;
}
}
if (depth == 8)
{
if (img_n != out_n)
{
cur[img_n] = 255;
}
raw += img_n;
cur += out_n;
prior += out_n;
}
else if (depth == 16)
{
if (img_n != out_n)
{
cur[filter_bytes] = 255;
cur[filter_bytes + 1] = 255;
}
raw += filter_bytes;
cur += output_bytes;
prior += output_bytes;
}
else
{
raw += 1;
cur += 1;
prior += 1;
}
if (depth < 8 || img_n == out_n)
{
var nk = (width - 1) * filter_bytes;
switch (filter)
{
case STBI__F_none:
CRuntime.memcpy(cur, raw, (ulong)nk);
break;
case STBI__F_sub:
for (k = 0; k < nk; ++k)
{
cur[k] = (byte)((raw[k] + cur[k - filter_bytes]) & 255);
}
break;
case STBI__F_up:
for (k = 0; k < nk; ++k)
{
cur[k] = (byte)((raw[k] + prior[k]) & 255);
}
break;
case STBI__F_avg:
for (k = 0; k < nk; ++k)
{
cur[k] = (byte)((raw[k] + ((prior[k] + cur[k - filter_bytes]) >> 1)) & 255);
}
break;
case STBI__F_paeth:
for (k = 0; k < nk; ++k)
{
cur[k] = (byte)((raw[k] + stbi__paeth(cur[k - filter_bytes], prior[k],
prior[k - filter_bytes])) & 255);
}
break;
case STBI__F_avg_first:
for (k = 0; k < nk; ++k)
{
cur[k] = (byte)((raw[k] + (cur[k - filter_bytes] >> 1)) & 255);
}
break;
case STBI__F_paeth_first:
for (k = 0; k < nk; ++k)
{
cur[k] = (byte)((raw[k] + stbi__paeth(cur[k - filter_bytes], 0, 0)) & 255);
}
break;
}
raw += nk;
}
else
{
switch (filter)
{
case STBI__F_none:
for (i = x - 1;
i >= 1;
--i, cur[filter_bytes] = (byte)255, raw += filter_bytes, cur += output_bytes, prior +=
output_bytes)
{
for (k = 0; k < filter_bytes; ++k)
{
cur[k] = raw[k];
}
}
break;
case STBI__F_sub:
for (i = x - 1;
i >= 1;
--i, cur[filter_bytes] = (byte)255, raw += filter_bytes, cur += output_bytes, prior +=
output_bytes)
{
for (k = 0; k < filter_bytes; ++k)
{
cur[k] = (byte)((raw[k] + cur[k - output_bytes]) & 255);
}
}
break;
case STBI__F_up:
for (i = x - 1;
i >= 1;
--i, cur[filter_bytes] = (byte)255, raw += filter_bytes, cur += output_bytes, prior +=
output_bytes)
{
for (k = 0; k < filter_bytes; ++k)
{
cur[k] = (byte)((raw[k] + prior[k]) & 255);
}
}
break;
case STBI__F_avg:
for (i = x - 1;
i >= 1;
--i, cur[filter_bytes] = (byte)255, raw += filter_bytes, cur += output_bytes, prior +=
output_bytes)
{
for (k = 0; k < filter_bytes; ++k)
{
cur[k] = (byte)((raw[k] + ((prior[k] + cur[k - output_bytes]) >> 1)) & 255);
}
}
break;
case STBI__F_paeth:
for (i = x - 1;
i >= 1;
--i, cur[filter_bytes] = (byte)255, raw += filter_bytes, cur += output_bytes, prior +=
output_bytes)
{
for (k = 0; k < filter_bytes; ++k)
{
cur[k] = (byte)((raw[k] + stbi__paeth(cur[k - output_bytes], prior[k],
prior[k - output_bytes])) & 255);
}
}
break;
case STBI__F_avg_first:
for (i = x - 1;
i >= 1;
--i, cur[filter_bytes] = (byte)255, raw += filter_bytes, cur += output_bytes, prior +=
output_bytes)
{
for (k = 0; k < filter_bytes; ++k)
{
cur[k] = (byte)((raw[k] + (cur[k - output_bytes] >> 1)) & 255);
}
}
break;
case STBI__F_paeth_first:
for (i = x - 1;
i >= 1;
--i, cur[filter_bytes] = (byte)255, raw += filter_bytes, cur += output_bytes, prior +=
output_bytes)
{
for (k = 0; k < filter_bytes; ++k)
{
cur[k] = (byte)((raw[k] + stbi__paeth(cur[k - output_bytes], 0, 0)) & 255);
}
}
break;
}
if (depth == 16)
{
cur = a._out_ + stride * j;
for (i = (uint)0; i < x; ++i, cur += output_bytes)
{
cur[filter_bytes + 1] = 255;
}
}
}
}
if (depth < 8)
{
for (j = (uint)0; j < y; ++j)
{
var cur = a._out_ + stride * j;
var _in_ = a._out_ + stride * j + x * out_n - img_width_bytes;
var scale = (byte)(color == 0 ? stbi__depth_scale_table[depth] : 1);
if (depth == 4)
{
for (k = (int)(x * img_n); k >= 2; k -= 2, ++_in_)
{
*cur++ = (byte)(scale * (*_in_ >> 4));
*cur++ = (byte)(scale * (*_in_ & 0x0f));
}
if (k > 0)
{
*cur++ = (byte)(scale * (*_in_ >> 4));
}
}
else if (depth == 2)
{
for (k = (int)(x * img_n); k >= 4; k -= 4, ++_in_)
{
*cur++ = (byte)(scale * (*_in_ >> 6));
*cur++ = (byte)(scale * ((*_in_ >> 4) & 0x03));
*cur++ = (byte)(scale * ((*_in_ >> 2) & 0x03));
*cur++ = (byte)(scale * (*_in_ & 0x03));
}
if (k > 0)
{
*cur++ = (byte)(scale * (*_in_ >> 6));
}
if (k > 1)
{
*cur++ = (byte)(scale * ((*_in_ >> 4) & 0x03));
}
if (k > 2)
{
*cur++ = (byte)(scale * ((*_in_ >> 2) & 0x03));
}
}
else if (depth == 1)
{
for (k = (int)(x * img_n); k >= 8; k -= 8, ++_in_)
{
*cur++ = (byte)(scale * (*_in_ >> 7));
*cur++ = (byte)(scale * ((*_in_ >> 6) & 0x01));
*cur++ = (byte)(scale * ((*_in_ >> 5) & 0x01));
*cur++ = (byte)(scale * ((*_in_ >> 4) & 0x01));
*cur++ = (byte)(scale * ((*_in_ >> 3) & 0x01));
*cur++ = (byte)(scale * ((*_in_ >> 2) & 0x01));
*cur++ = (byte)(scale * ((*_in_ >> 1) & 0x01));
*cur++ = (byte)(scale * (*_in_ & 0x01));
}
if (k > 0)
{
*cur++ = (byte)(scale * (*_in_ >> 7));
}
if (k > 1)
{
*cur++ = (byte)(scale * ((*_in_ >> 6) & 0x01));
}
if (k > 2)
{
*cur++ = (byte)(scale * ((*_in_ >> 5) & 0x01));
}
if (k > 3)
{
*cur++ = (byte)(scale * ((*_in_ >> 4) & 0x01));
}
if (k > 4)
{
*cur++ = (byte)(scale * ((*_in_ >> 3) & 0x01));
}
if (k > 5)
{
*cur++ = (byte)(scale * ((*_in_ >> 2) & 0x01));
}
if (k > 6)
{
*cur++ = (byte)(scale * ((*_in_ >> 1) & 0x01));
}
}
if (img_n != out_n)
{
var q = 0;
cur = a._out_ + stride * j;
if (img_n == 1)
{
for (q = (int)(x - 1); q >= 0; --q)
{
cur[q * 2 + 1] = 255;
cur[q * 2 + 0] = cur[q];
}
}
else
{
for (q = (int)(x - 1); q >= 0; --q)
{
cur[q * 4 + 3] = 255;
cur[q * 4 + 2] = cur[q * 3 + 2];
cur[q * 4 + 1] = cur[q * 3 + 1];
cur[q * 4 + 0] = cur[q * 3 + 0];
}
}
}
}
}
else if (depth == 16)
{
var cur = a._out_;
var cur16 = (ushort *)cur;
for (i = (uint)0; i < x * y * out_n; ++i, cur16++, cur += 2)
{
*cur16 = (ushort)((cur[0] << 8) | cur[1]);
}
}
return(1);
}
public static byte *stbi__hdr_to_ldr(float *data, int x, int y, int comp)
{
var i = 0;
var k = 0;
var n = 0;
byte *output;
if (data == null)
{
return(null);
}
output = (byte *)stbi__malloc_mad3(x, y, comp, 0);
if (output == null)
{
CRuntime.free(data);
return((byte *)(ulong)(stbi__err("outofmem") != 0 ? 0 : 0));
}
if ((comp & 1) != 0)
{
n = comp;
}
else
{
n = comp - 1;
}
for (i = 0; i < x * y; ++i)
{
for (k = 0; k < n; ++k)
{
var z = (float)CRuntime.pow(data[i * comp + k] * stbi__h2l_scale_i, stbi__h2l_gamma_i) * 255 +
0.5f;
if (z < 0)
{
z = 0;
}
if (z > 255)
{
z = 255;
}
output[i * comp + k] = (byte)(int)z;
}
if (k < comp)
{
var z = data[i * comp + k] * 255 + 0.5f;
if (z < 0)
{
z = 0;
}
if (z > 255)
{
z = 255;
}
output[i * comp + k] = (byte)(int)z;
}
}
CRuntime.free(data);
return(output);
}
public static void *stbi__load_gif_main(stbi__context s, int **delays, int *x, int *y, int *z, int *comp,
int req_comp)
{
if (stbi__gif_test(s) != 0)
{
var layers = 0;
byte *u = null;
byte *_out_ = null;
byte *two_back = null;
var g = new stbi__gif();
var stride = 0;
var out_size = 0;
var delays_size = 0;
if (delays != null)
{
*delays = null;
}
do
{
u = stbi__gif_load_next(s, g, comp, req_comp, two_back);
if (u != null)
{
*x = g.w;
*y = g.h;
++layers;
stride = g.w * g.h * 4;
if (_out_ != null)
{
void *tmp = (byte *)CRuntime.realloc(_out_, (ulong)(layers * stride));
if (tmp == null)
{
return(stbi__load_gif_main_outofmem(g, _out_, delays));
}
_out_ = (byte *)tmp;
out_size = layers * stride;
if (delays != null)
{
var new_delays = (int *)CRuntime.realloc(*delays, (ulong)(sizeof(int) * layers));
if (new_delays == null)
{
return(stbi__load_gif_main_outofmem(g, _out_, delays));
}
*delays = new_delays;
delays_size = layers * sizeof(int);
}
}
else
{
_out_ = (byte *)stbi__malloc((ulong)(layers * stride));
if (_out_ == null)
{
return(stbi__load_gif_main_outofmem(g, _out_, delays));
}
out_size = layers * stride;
if (delays != null)
{
*delays = (int *)stbi__malloc((ulong)(layers * sizeof(int)));
if (*delays == null)
{
return(stbi__load_gif_main_outofmem(g, _out_, delays));
}
delays_size = layers * sizeof(int);
}
}
CRuntime.memcpy(_out_ + (layers - 1) * stride, u, (ulong)stride);
if (layers >= 2)
{
two_back = _out_ - 2 * stride;
}
if (delays != null)
{
(*delays)[layers - 1U] = g.delay;
}
}
} while (u != null);
CRuntime.free(g._out_);
CRuntime.free(g.history);
CRuntime.free(g.background);
if (req_comp != 0 && req_comp != 4)
{
_out_ = stbi__convert_format(_out_, 4, req_comp, (uint)(layers * g.w), (uint)g.h);
}
*z = layers;
return(_out_);
}
return((byte *)(ulong)(stbi__err("not GIF") != 0 ? 0 : 0));
}
public static int stbi__parse_png_file(stbi__png z, int scan, int req_comp)
{
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.img_x = stbi__get32be(s);
if (s.img_x > 1 << 24)
{
return(stbi__err("too large"));
}
s.img_y = stbi__get32be(s);
if (s.img_y > 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.img_x == 0 || s.img_y == 0)
{
return(stbi__err("0-pixel image"));
}
if (pal_img_n == 0)
{
s.img_n = ((color & 2) != 0 ? 3 : 1) + ((color & 4) != 0 ? 1 : 0);
if ((1 << 30) / s.img_x / s.img_n < s.img_y)
{
return(stbi__err("too large"));
}
if (scan == STBI__SCAN_header)
{
return(1);
}
}
else
{
s.img_n = 1;
if ((1 << 30) / s.img_x / 4 < s.img_y)
{
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.img_n = 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.img_n & 1) == 0)
{
return(stbi__err("tRNS with alpha"));
}
if (c.length != (uint)s.img_n * 2)
{
return(stbi__err("bad tRNS len"));
}
has_trans = 1;
if (z.depth == 16)
{
for (k = 0; k < s.img_n; ++k)
{
tc16[k] = (ushort)stbi__get16be(s);
}
}
else
{
for (k = 0; k < s.img_n; ++k)
{
tc[k] = (byte)((byte)(stbi__get16be(s) & 255) * stbi__depth_scale_table[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.img_n = 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.img_x * z.depth + 7) / 8);
raw_len = (uint)(bpl * s.img_y * s.img_n + s.img_y);
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 (req_comp == s.img_n + 1 && req_comp != 3 && pal_img_n == 0 || has_trans != 0)
{
s.img_out_n = s.img_n + 1;
}
else
{
s.img_out_n = s.img_n;
}
if (stbi__create_png_image(z, z.expanded, raw_len, s.img_out_n, z.depth, color, interlace) == 0)
{
return(0);
}
if (has_trans != 0)
{
if (z.depth == 16)
{
if (stbi__compute_transparency16(z, tc16, s.img_out_n) == 0)
{
return(0);
}
}
else
{
if (stbi__compute_transparency(z, tc, s.img_out_n) == 0)
{
return(0);
}
}
}
if (is_iphone != 0 && stbi__de_iphone_flag != 0 && s.img_out_n > 2)
{
stbi__de_iphone(z);
}
if (pal_img_n != 0)
{
s.img_n = pal_img_n;
s.img_out_n = pal_img_n;
if (req_comp >= 3)
{
s.img_out_n = req_comp;
}
if (stbi__expand_png_palette(z, palette, (int)pal_len, s.img_out_n) == 0)
{
return(0);
}
}
else if (has_trans != 0)
{
++s.img_n;
}
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 void *stbi__bmp_load(stbi__context s, int *x, int *y, int *comp, int req_comp,
stbi__result_info *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 stbi__bmp_data();
info.all_a = 255;
if (stbi__bmp_parse_header(s, &info) == null)
{
return(null);
}
flip_vertically = (int)s.img_y > 0 ? 1 : 0;
s.img_y = (uint)CRuntime.abs((int)s.img_y);
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.img_n = ma != 0 ? 4 : 3;
if (req_comp != 0 && req_comp >= 3)
{
target = req_comp;
}
else
{
target = s.img_n;
}
if (stbi__mad3sizes_valid(target, (int)s.img_x, (int)s.img_y, 0) == 0)
{
return((byte *)(ulong)(stbi__err("too large") != 0 ? (byte *)null : null));
}
_out_ = (byte *)stbi__malloc_mad3(target, (int)s.img_x, (int)s.img_y, 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.img_x + 7) >> 3);
}
else if (info.bpp == 4)
{
width = (int)((s.img_x + 1) >> 1);
}
else if (info.bpp == 8)
{
width = (int)s.img_x;
}
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.img_y; ++j)
{
var bit_offset = 7;
var v = (int)stbi__get8(s);
for (i = 0; i < (int)s.img_x; ++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.img_x)
{
break;
}
if (--bit_offset < 0)
{
bit_offset = 7;
v = stbi__get8(s);
}
}
stbi__skip(s, pad);
}
}
else
{
for (j = 0; j < (int)s.img_y; ++j)
{
for (i = 0; i < (int)s.img_x; 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.img_x)
{
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.img_x);
}
else if (info.bpp == 16)
{
width = (int)(2 * s.img_x);
}
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.img_y; ++j)
{
if (easy != 0)
{
for (i = 0; i < (int)s.img_x; ++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.img_x; ++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.img_x * s.img_y - 1); i >= 0; i -= 4)
{
_out_[i] = 255;
}
}
if (flip_vertically != 0)
{
byte t = 0;
for (j = 0; j < (int)s.img_y >> 1; ++j)
{
var p1 = _out_ + j * s.img_x * target;
var p2 = _out_ + (s.img_y - 1 - j) * s.img_x * target;
for (i = 0; i < (int)s.img_x * target; ++i)
{
t = p1[i];
p1[i] = p2[i];
p2[i] = t;
}
}
}
if (req_comp != 0 && req_comp != target)
{
_out_ = stbi__convert_format(_out_, target, req_comp, s.img_x, s.img_y);
if (_out_ == null)
{
return(_out_);
}
}
*x = (int)s.img_x;
*y = (int)s.img_y;
if (comp != null)
{
*comp = s.img_n;
}
return(_out_);
}
public static void *stbi__tga_load(stbi__context s, int *x, int *y, int *comp, int req_comp,
stbi__result_info *ri)
{
int tga_offset = stbi__get8(s);
int tga_indexed = stbi__get8(s);
int tga_image_type = stbi__get8(s);
var tga_is_RLE = 0;
var tga_palette_start = stbi__get16le(s);
var tga_palette_len = stbi__get16le(s);
int tga_palette_bits = stbi__get8(s);
var tga_x_origin = stbi__get16le(s);
var tga_y_origin = stbi__get16le(s);
var tga_width = stbi__get16le(s);
var tga_height = stbi__get16le(s);
int tga_bits_per_pixel = stbi__get8(s);
var tga_comp = 0;
var tga_rgb16 = 0;
int tga_inverted = stbi__get8(s);
byte *tga_data;
byte *tga_palette = null;
var i = 0;
var j = 0;
var raw_data = stackalloc byte[] { 0, 0, 0, 0 };
var RLE_count = 0;
var RLE_repeating = 0;
var read_next_pixel = 1;
if (tga_height > 1 << 24)
{
return((byte *)(ulong)(stbi__err("too large") != 0 ? 0 : 0));
}
if (tga_width > 1 << 24)
{
return((byte *)(ulong)(stbi__err("too large") != 0 ? 0 : 0));
}
if (tga_image_type >= 8)
{
tga_image_type -= 8;
tga_is_RLE = 1;
}
tga_inverted = 1 - ((tga_inverted >> 5) & 1);
if (tga_indexed != 0)
{
tga_comp = stbi__tga_get_comp(tga_palette_bits, 0, &tga_rgb16);
}
else
{
tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, tga_image_type == 3 ? 1 : 0, &tga_rgb16);
}
if (tga_comp == 0)
{
return((byte *)(ulong)(stbi__err("bad format") != 0 ? 0 : 0));
}
*x = tga_width;
*y = tga_height;
if (comp != null)
{
*comp = tga_comp;
}
if (stbi__mad3sizes_valid(tga_width, tga_height, tga_comp, 0) == 0)
{
return((byte *)(ulong)(stbi__err("too large") != 0 ? 0 : 0));
}
tga_data = (byte *)stbi__malloc_mad3(tga_width, tga_height, tga_comp, 0);
if (tga_data == null)
{
return((byte *)(ulong)(stbi__err("outofmem") != 0 ? 0 : 0));
}
stbi__skip(s, tga_offset);
if (tga_indexed == 0 && tga_is_RLE == 0 && tga_rgb16 == 0)
{
for (i = 0; i < tga_height; ++i)
{
var row = tga_inverted != 0 ? tga_height - i - 1 : i;
var tga_row = tga_data + row * tga_width * tga_comp;
stbi__getn(s, tga_row, tga_width * tga_comp);
}
}
else
{
if (tga_indexed != 0)
{
if (tga_palette_len == 0)
{
CRuntime.free(tga_data);
return((byte *)(ulong)(stbi__err("bad palette") != 0 ? 0 : 0));
}
stbi__skip(s, tga_palette_start);
tga_palette = (byte *)stbi__malloc_mad2(tga_palette_len, tga_comp, 0);
if (tga_palette == null)
{
CRuntime.free(tga_data);
return((byte *)(ulong)(stbi__err("outofmem") != 0 ? 0 : 0));
}
if (tga_rgb16 != 0)
{
var pal_entry = tga_palette;
for (i = 0; i < tga_palette_len; ++i)
{
stbi__tga_read_rgb16(s, pal_entry);
pal_entry += tga_comp;
}
}
else if (stbi__getn(s, tga_palette, tga_palette_len * tga_comp) == 0)
{
CRuntime.free(tga_data);
CRuntime.free(tga_palette);
return((byte *)(ulong)(stbi__err("bad palette") != 0 ? 0 : 0));
}
}
for (i = 0; i < tga_width * tga_height; ++i)
{
if (tga_is_RLE != 0)
{
if (RLE_count == 0)
{
int RLE_cmd = stbi__get8(s);
RLE_count = 1 + (RLE_cmd & 127);
RLE_repeating = RLE_cmd >> 7;
read_next_pixel = 1;
}
else if (RLE_repeating == 0)
{
read_next_pixel = 1;
}
}
else
{
read_next_pixel = 1;
}
if (read_next_pixel != 0)
{
if (tga_indexed != 0)
{
var pal_idx = tga_bits_per_pixel == 8 ? stbi__get8(s) : stbi__get16le(s);
if (pal_idx >= tga_palette_len)
{
pal_idx = 0;
}
pal_idx *= tga_comp;
for (j = 0; j < tga_comp; ++j)
{
raw_data[j] = tga_palette[pal_idx + j];
}
}
else if (tga_rgb16 != 0)
{
stbi__tga_read_rgb16(s, raw_data);
}
else
{
for (j = 0; j < tga_comp; ++j)
{
raw_data[j] = stbi__get8(s);
}
}
read_next_pixel = 0;
}
for (j = 0; j < tga_comp; ++j)
{
tga_data[i * tga_comp + j] = raw_data[j];
}
--RLE_count;
}
if (tga_inverted != 0)
{
for (j = 0; j * 2 < tga_height; ++j)
{
var index1 = j * tga_width * tga_comp;
var index2 = (tga_height - 1 - j) * tga_width * tga_comp;
for (i = tga_width * tga_comp; i > 0; --i)
{
var temp = tga_data[index1];
tga_data[index1] = tga_data[index2];
tga_data[index2] = temp;
++index1;
++index2;
}
}
}
if (tga_palette != null)
{
CRuntime.free(tga_palette);
}
}
if (tga_comp >= 3 && tga_rgb16 == 0)
{
var tga_pixel = tga_data;
for (i = 0; i < tga_width * tga_height; ++i)
{
var temp = tga_pixel[0];
tga_pixel[0] = tga_pixel[2];
tga_pixel[2] = temp;
tga_pixel += tga_comp;
}
}
if (req_comp != 0 && req_comp != tga_comp)
{
tga_data = stbi__convert_format(tga_data, tga_comp, req_comp, (uint)tga_width, (uint)tga_height);
}
tga_palette_start = tga_palette_len = tga_palette_bits = tga_x_origin = tga_y_origin = 0;
return(tga_data);
}
public static void *stbi__psd_load(stbi__context s, int *x, int *y, int *comp, int req_comp,
stbi__result_info *ri, int bpc)
{
var pixelCount = 0;
var channelCount = 0;
var compression = 0;
var channel = 0;
var i = 0;
var bitdepth = 0;
var w = 0;
var h = 0;
byte *_out_;
if (stbi__get32be(s) != 0x38425053)
{
return((byte *)(ulong)(stbi__err("not PSD") != 0 ? 0 : 0));
}
if (stbi__get16be(s) != 1)
{
return((byte *)(ulong)(stbi__err("wrong version") != 0 ? 0 : 0));
}
stbi__skip(s, 6);
channelCount = stbi__get16be(s);
if (channelCount < 0 || channelCount > 16)
{
return((byte *)(ulong)(stbi__err("wrong channel count") != 0 ? 0 : 0));
}
h = (int)stbi__get32be(s);
w = (int)stbi__get32be(s);
if (h > 1 << 24)
{
return((byte *)(ulong)(stbi__err("too large") != 0 ? 0 : 0));
}
if (w > 1 << 24)
{
return((byte *)(ulong)(stbi__err("too large") != 0 ? 0 : 0));
}
bitdepth = stbi__get16be(s);
if (bitdepth != 8 && bitdepth != 16)
{
return((byte *)(ulong)(stbi__err("unsupported bit depth") != 0 ? 0 : 0));
}
if (stbi__get16be(s) != 3)
{
return((byte *)(ulong)(stbi__err("wrong color format") != 0 ? 0 : 0));
}
stbi__skip(s, (int)stbi__get32be(s));
stbi__skip(s, (int)stbi__get32be(s));
stbi__skip(s, (int)stbi__get32be(s));
compression = stbi__get16be(s);
if (compression > 1)
{
return((byte *)(ulong)(stbi__err("bad compression") != 0 ? 0 : 0));
}
if (stbi__mad3sizes_valid(4, w, h, 0) == 0)
{
return((byte *)(ulong)(stbi__err("too large") != 0 ? 0 : 0));
}
if (compression == 0 && bitdepth == 16 && bpc == 16)
{
_out_ = (byte *)stbi__malloc_mad3(8, w, h, 0);
ri->bits_per_channel = 16;
}
else
{
_out_ = (byte *)stbi__malloc((ulong)(4 * w * h));
}
if (_out_ == null)
{
return((byte *)(ulong)(stbi__err("outofmem") != 0 ? 0 : 0));
}
pixelCount = w * h;
if (compression != 0)
{
stbi__skip(s, h * channelCount * 2);
for (channel = 0; channel < 4; channel++)
{
byte *p;
p = _out_ + channel;
if (channel >= channelCount)
{
for (i = 0; i < pixelCount; i++, p += 4)
{
*p = (byte)(channel == 3 ? 255 : 0);
}
}
else
{
if (stbi__psd_decode_rle(s, p, pixelCount) == 0)
{
CRuntime.free(_out_);
return((byte *)(ulong)(stbi__err("corrupt") != 0 ? 0 : 0));
}
}
}
}
else
{
for (channel = 0; channel < 4; channel++)
{
if (channel >= channelCount)
{
if (bitdepth == 16 && bpc == 16)
{
var q = (ushort *)_out_ + channel;
var val = (ushort)(channel == 3 ? 65535 : 0);
for (i = 0; i < pixelCount; i++, q += 4)
{
*q = val;
}
}
else
{
var p = _out_ + channel;
var val = (byte)(channel == 3 ? 255 : 0);
for (i = 0; i < pixelCount; i++, p += 4)
{
*p = val;
}
}
}
else
{
if (ri->bits_per_channel == 16)
{
var q = (ushort *)_out_ + channel;
for (i = 0; i < pixelCount; i++, q += 4)
{
*q = (ushort)stbi__get16be(s);
}
}
else
{
var p = _out_ + channel;
if (bitdepth == 16)
{
for (i = 0; i < pixelCount; i++, p += 4)
{
*p = (byte)(stbi__get16be(s) >> 8);
}
}
else
{
for (i = 0; i < pixelCount; i++, p += 4)
{
*p = stbi__get8(s);
}
}
}
}
}
}
if (channelCount >= 4)
{
if (ri->bits_per_channel == 16)
{
for (i = 0; i < w * h; ++i)
{
var pixel = (ushort *)_out_ + 4 * i;
if (pixel[3] != 0 && pixel[3] != 65535)
{
var a = pixel[3] / 65535.0f;
var ra = 1.0f / a;
var inv_a = 65535.0f * (1 - ra);
pixel[0] = (ushort)(pixel[0] * ra + inv_a);
pixel[1] = (ushort)(pixel[1] * ra + inv_a);
pixel[2] = (ushort)(pixel[2] * ra + inv_a);
}
}
}
else
{
for (i = 0; i < w * h; ++i)
{
var pixel = _out_ + 4 * i;
if (pixel[3] != 0 && pixel[3] != 255)
{
var a = pixel[3] / 255.0f;
var ra = 1.0f / a;
var inv_a = 255.0f * (1 - ra);
pixel[0] = (byte)(pixel[0] * ra + inv_a);
pixel[1] = (byte)(pixel[1] * ra + inv_a);
pixel[2] = (byte)(pixel[2] * ra + inv_a);
}
}
}
}
if (req_comp != 0 && req_comp != 4)
{
if (ri->bits_per_channel == 16)
{
_out_ = (byte *)stbi__convert_format16((ushort *)_out_, 4, req_comp, (uint)w, (uint)h);
}
else
{
_out_ = stbi__convert_format(_out_, 4, req_comp, (uint)w, (uint)h);
}
if (_out_ == null)
{
return(_out_);
}
}
if (comp != null)
{
*comp = 4;
}
*y = h;
*x = w;
return(_out_);
}
public static byte *stbi__gif_load_next(stbi__context s, stbi__gif g, int *comp, int req_comp, byte *two_back)
{
var dispose = 0;
var first_frame = 0;
var pi = 0;
var pcount = 0;
first_frame = 0;
if (g._out_ == null)
{
if (stbi__gif_header(s, g, comp, 0) == 0)
{
return(null);
}
if (stbi__mad3sizes_valid(4, g.w, g.h, 0) == 0)
{
return((byte *)(ulong)(stbi__err("too large") != 0 ? 0 : 0));
}
pcount = g.w * g.h;
g._out_ = (byte *)stbi__malloc((ulong)(4 * pcount));
g.background = (byte *)stbi__malloc((ulong)(4 * pcount));
g.history = (byte *)stbi__malloc((ulong)pcount);
if (g._out_ == null || g.background == null || g.history == null)
{
return((byte *)(ulong)(stbi__err("outofmem") != 0 ? 0 : 0));
}
CRuntime.memset(g._out_, 0x00, (ulong)(4 * pcount));
CRuntime.memset(g.background, 0x00, (ulong)(4 * pcount));
CRuntime.memset(g.history, 0x00, (ulong)pcount);
first_frame = 1;
}
else
{
dispose = (g.eflags & 0x1C) >> 2;
pcount = g.w * g.h;
if (dispose == 3 && two_back == null)
{
dispose = 2;
}
if (dispose == 3)
{
for (pi = 0; pi < pcount; ++pi)
{
if (g.history[pi] != 0)
{
CRuntime.memcpy(&g._out_[pi * 4], &two_back[pi * 4], (ulong)4);
}
}
}
else if (dispose == 2)
{
for (pi = 0; pi < pcount; ++pi)
{
if (g.history[pi] != 0)
{
CRuntime.memcpy(&g._out_[pi * 4], &g.background[pi * 4], (ulong)4);
}
}
}
CRuntime.memcpy(g.background, g._out_, (ulong)(4 * g.w * g.h));
}
CRuntime.memset(g.history, 0x00, (ulong)(g.w * g.h));
for (; ;)
{
int tag = stbi__get8(s);
switch (tag)
{
case 0x2C:
{
var x = 0;
var y = 0;
var w = 0;
var h = 0;
byte *o;
x = stbi__get16le(s);
y = stbi__get16le(s);
w = stbi__get16le(s);
h = stbi__get16le(s);
if (x + w > g.w || y + h > g.h)
{
return((byte *)(ulong)(stbi__err("bad Image Descriptor") != 0 ? 0 : 0));
}
g.line_size = g.w * 4;
g.start_x = x * 4;
g.start_y = y * g.line_size;
g.max_x = g.start_x + w * 4;
g.max_y = g.start_y + h * g.line_size;
g.cur_x = g.start_x;
g.cur_y = g.start_y;
if (w == 0)
{
g.cur_y = g.max_y;
}
g.lflags = stbi__get8(s);
if ((g.lflags & 0x40) != 0)
{
g.step = 8 * g.line_size;
g.parse = 3;
}
else
{
g.step = g.line_size;
g.parse = 0;
}
if ((g.lflags & 0x80) != 0)
{
stbi__gif_parse_colortable(s, g.lpal, 2 << (g.lflags & 7),
(g.eflags & 0x01) != 0 ? g.transparent : -1);
g.color_table = (byte *)g.lpal;
}
else if ((g.flags & 0x80) != 0)
{
g.color_table = (byte *)g.pal;
}
else
{
return((byte *)(ulong)(stbi__err("missing color table") != 0 ? 0 : 0));
}
o = stbi__process_gif_raster(s, g);
if (o == null)
{
return(null);
}
pcount = g.w * g.h;
if (first_frame != 0 && g.bgindex > 0)
{
for (pi = 0; pi < pcount; ++pi)
{
if (g.history[pi] == 0)
{
g.pal[g.bgindex][3] = 255;
CRuntime.memcpy(&g._out_[pi * 4], &g.pal[g.bgindex], (ulong)4);
}
}
}
return(o);
}
case 0x21:
{
var len = 0;
int ext = stbi__get8(s);
if (ext == 0xF9)
{
len = stbi__get8(s);
if (len == 4)
{
g.eflags = stbi__get8(s);
g.delay = 10 * stbi__get16le(s);
if (g.transparent >= 0)
{
g.pal[g.transparent][3] = 255;
}
if ((g.eflags & 0x01) != 0)
{
g.transparent = stbi__get8(s);
if (g.transparent >= 0)
{
g.pal[g.transparent][3] = 0;
}
}
else
{
stbi__skip(s, 1);
g.transparent = -1;
}
}
else
{
stbi__skip(s, len);
break;
}
}
while ((len = stbi__get8(s)) != 0)
{
stbi__skip(s, len);
}
break;
}
case 0x3B:
return(null);
default:
return((byte *)(ulong)(stbi__err("unknown code") != 0 ? 0 : 0));
}
}
}
public static float *stbi__hdr_load(stbi__context s, int *x, int *y, int *comp, int req_comp,
stbi__result_info *ri)
{
var buffer = stackalloc sbyte[1024];
sbyte *token;
var valid = 0;
var width = 0;
var height = 0;
byte * scanline;
float *hdr_data;
var len = 0;
byte count = 0;
byte value = 0;
var i = 0;
var j = 0;
var k = 0;
var c1 = 0;
var c2 = 0;
var z = 0;
sbyte *headerToken;
headerToken = stbi__hdr_gettoken(s, buffer);
if (CRuntime.strcmp(headerToken, "#?RADIANCE") != 0 && CRuntime.strcmp(headerToken, "#?RGBE") != 0)
{
return((float *)(ulong)(stbi__err("not HDR") != 0 ? 0 : 0));
}
for (; ;)
{
token = stbi__hdr_gettoken(s, buffer);
if (token[0] == 0)
{
break;
}
if (CRuntime.strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0)
{
valid = 1;
}
}
if (valid == 0)
{
return((float *)(ulong)(stbi__err("unsupported format") != 0 ? 0 : 0));
}
token = stbi__hdr_gettoken(s, buffer);
if (CRuntime.strncmp(token, "-Y ", 3) != 0)
{
return((float *)(ulong)(stbi__err("unsupported data layout") != 0 ? 0 : 0));
}
token += 3;
height = (int)CRuntime.strtol(token, &token, 10);
while (*token == 32)
{
++token;
}
if (CRuntime.strncmp(token, "+X ", 3) != 0)
{
return((float *)(ulong)(stbi__err("unsupported data layout") != 0 ? 0 : 0));
}
token += 3;
width = (int)CRuntime.strtol(token, null, 10);
if (height > 1 << 24)
{
return((float *)(ulong)(stbi__err("too large") != 0 ? 0 : 0));
}
if (width > 1 << 24)
{
return((float *)(ulong)(stbi__err("too large") != 0 ? 0 : 0));
}
*x = width;
*y = height;
if (comp != null)
{
*comp = 3;
}
if (req_comp == 0)
{
req_comp = 3;
}
if (stbi__mad4sizes_valid(width, height, req_comp, sizeof(float), 0) == 0)
{
return((float *)(ulong)(stbi__err("too large") != 0 ? 0 : 0));
}
hdr_data = (float *)stbi__malloc_mad4(width, height, req_comp, sizeof(float), 0);
if (hdr_data == null)
{
return((float *)(ulong)(stbi__err("outofmem") != 0 ? 0 : 0));
}
main_decode_loop:
var enterMainDecode = false;
if (enterMainDecode)
{
for (; j < height; ++j)
{
for (; i < width; ++i)
{
var rgbe = stackalloc byte[4];
stbi__getn(s, rgbe, 4);
stbi__hdr_convert(hdr_data + j * width * req_comp + i * req_comp, rgbe, req_comp);
}
}
goto finish;
}
if (width < 8 || width >= 32768)
{
i = j = 0;
enterMainDecode = true;
goto main_decode_loop;
}
scanline = null;
for (j = 0; j < height; ++j)
{
c1 = stbi__get8(s);
c2 = stbi__get8(s);
len = stbi__get8(s);
if (c1 != 2 || c2 != 2 || (len & 0x80) != 0)
{
var rgbe = stackalloc byte[4];
rgbe[0] = (byte)c1;
rgbe[1] = (byte)c2;
rgbe[2] = (byte)len;
rgbe[3] = stbi__get8(s);
stbi__hdr_convert(hdr_data, rgbe, req_comp);
i = 1;
j = 0;
CRuntime.free(scanline);
goto main_decode_loop;
}
len <<= 8;
len |= stbi__get8(s);
if (len != width)
{
CRuntime.free(hdr_data);
CRuntime.free(scanline);
return((float *)(ulong)(stbi__err("invalid decoded scanline length") != 0 ? 0 : 0));
}
if (scanline == null)
{
scanline = (byte *)stbi__malloc_mad2(width, 4, 0);
if (scanline == null)
{
CRuntime.free(hdr_data);
return((float *)(ulong)(stbi__err("outofmem") != 0 ? 0 : 0));
}
}
for (k = 0; k < 4; ++k)
{
var nleft = 0;
i = 0;
while ((nleft = width - i) > 0)
{
count = stbi__get8(s);
if (count > 128)
{
value = stbi__get8(s);
count -= 128;
if (count > nleft)
{
CRuntime.free(hdr_data);
CRuntime.free(scanline);
return((float *)(ulong)(stbi__err("corrupt") != 0 ? 0 : 0));
}
for (z = 0; z < count; ++z)
{
scanline[i++ *4 + k] = value;
}
}
else
{
if (count > nleft)
{
CRuntime.free(hdr_data);
CRuntime.free(scanline);
return((float *)(ulong)(stbi__err("corrupt") != 0 ? 0 : 0));
}
for (z = 0; z < count; ++z)
{
scanline[i++ *4 + k] = stbi__get8(s);
}
}
}
}
for (i = 0; i < width; ++i)
{
stbi__hdr_convert(hdr_data + (j * width + i) * req_comp, scanline + i * 4, req_comp);
}
}
if (scanline != null)
{
CRuntime.free(scanline);
}
finish:
return(hdr_data);
}
private static void *stbi__malloc(int size)
{
return(CRuntime.malloc((ulong)size));
}
public static byte *stbi__convert_format(byte *data, int img_n, int req_comp, uint x, uint y)
{
var i = 0;
var j = 0;
byte *good;
if (req_comp == img_n)
{
return(data);
}
good = (byte *)stbi__malloc_mad3(req_comp, (int)x, (int)y, 0);
if (good == null)
{
CRuntime.free(data);
return((byte *)(ulong)(stbi__err("outofmem") != 0 ? 0 : 0));
}
for (j = 0; j < (int)y; ++j)
{
var src = data + j * x * img_n;
var dest = good + j * x * req_comp;
switch (img_n * 8 + req_comp)
{
case 1 * 8 + 2:
for (i = (int)(x - 1); i >= 0; --i, src += 1, dest += 2)
{
dest[0] = src[0];
dest[1] = 255;
}
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] = 255;
}
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] = 255;
}
break;
case 3 * 8 + 1:
for (i = (int)(x - 1); i >= 0; --i, src += 3, dest += 1)
{
dest[0] = stbi__compute_y(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(src[0], src[1], src[2]);
dest[1] = 255;
}
break;
case 4 * 8 + 1:
for (i = (int)(x - 1); i >= 0; --i, src += 4, dest += 1)
{
dest[0] = stbi__compute_y(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(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:
;
CRuntime.free(data);
CRuntime.free(good);
return((byte *)(ulong)(stbi__err("unsupported") != 0 ? 0 : 0));
}
}
CRuntime.free(data);
return(good);
}
){kind=link}