public static int stbi__bmp_set_mask_defaults(stbi__bmp_data *info, int compress)
{
if (compress == 3)
{
return(1);
}
if (compress == 0)
{
if (info->bpp == 16)
{
info->mr = 31u << 10;
info->mg = 31u << 5;
info->mb = 31u << 0;
}
else if (info->bpp == 32)
{
info->mr = 0xffu << 16;
info->mg = 0xffu << 8;
info->mb = 0xffu << 0;
info->ma = 0xffu << 24;
info->all_a = 0;
}
else
{
info->mr = info->mg = info->mb = info->ma = 0;
}
return(1);
}
return(0);
}
public static void *stbi__bmp_parse_header(stbi__context s, stbi__bmp_data *info)
{
var hsz = 0;
if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M')
{
return((byte *)(ulong)(stbi__err("not BMP") != 0 ? (byte *)null : null));
}
stbi__get32le(s);
stbi__get16le(s);
stbi__get16le(s);
info->offset = (int)stbi__get32le(s);
info->hsz = hsz = (int)stbi__get32le(s);
info->mr = info->mg = info->mb = info->ma = 0;
if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124)
{
return((byte *)(ulong)(stbi__err("unknown BMP") != 0 ? (byte *)null : null));
}
if (hsz == 12)
{
s.img_x = (uint)stbi__get16le(s);
s.img_y = (uint)stbi__get16le(s);
}
else
{
s.img_x = stbi__get32le(s);
s.img_y = stbi__get32le(s);
}
if (stbi__get16le(s) != 1)
{
return((byte *)(ulong)(stbi__err("bad BMP") != 0 ? (byte *)null : null));
}
info->bpp = stbi__get16le(s);
if (hsz != 12)
{
var compress = (int)stbi__get32le(s);
if (compress == 1 || compress == 2)
{
return((byte *)(ulong)(stbi__err("BMP RLE") != 0 ? (byte *)null : null));
}
stbi__get32le(s);
stbi__get32le(s);
stbi__get32le(s);
stbi__get32le(s);
stbi__get32le(s);
if (hsz == 40 || hsz == 56)
{
if (hsz == 56)
{
stbi__get32le(s);
stbi__get32le(s);
stbi__get32le(s);
stbi__get32le(s);
}
if (info->bpp == 16 || info->bpp == 32)
{
if (compress == 0)
{
if (info->bpp == 32)
{
info->mr = 0xffu << 16;
info->mg = 0xffu << 8;
info->mb = 0xffu << 0;
info->ma = 0xffu << 24;
info->all_a = 0;
}
else
{
info->mr = 31u << 10;
info->mg = 31u << 5;
info->mb = 31u << 0;
}
}
else if (compress == 3)
{
info->mr = stbi__get32le(s);
info->mg = stbi__get32le(s);
info->mb = stbi__get32le(s);
if (info->mr == info->mg && info->mg == info->mb)
{
return((byte *)(ulong)(stbi__err("bad BMP") != 0 ? (byte *)null : null));
}
}
else
{
return((byte *)(ulong)(stbi__err("bad BMP") != 0 ? (byte *)null : null));
}
}
}
else
{
var i = 0;
if (hsz != 108 && hsz != 124)
{
return((byte *)(ulong)(stbi__err("bad BMP") != 0 ? (byte *)null : null));
}
info->mr = stbi__get32le(s);
info->mg = stbi__get32le(s);
info->mb = stbi__get32le(s);
info->ma = stbi__get32le(s);
stbi__get32le(s);
for (i = 0; i < 12; ++i)
{
stbi__get32le(s);
}
if (hsz == 124)
{
stbi__get32le(s);
stbi__get32le(s);
stbi__get32le(s);
stbi__get32le(s);
}
}
}
return((void *)1);
}
public static void *stbi__bmp_parse_header(stbi__context s, stbi__bmp_data *info)
{
var hsz = 0;
if (stbi__get8(s) != 66 || stbi__get8(s) != 77)
{
return((byte *)(ulong)(stbi__err("not BMP") != 0 ? 0 : 0));
}
stbi__get32le(s);
stbi__get16le(s);
stbi__get16le(s);
info->offset = (int)stbi__get32le(s);
info->hsz = hsz = (int)stbi__get32le(s);
info->mr = info->mg = info->mb = info->ma = 0;
info->extra_read = 14;
if (info->offset < 0)
{
return((byte *)(ulong)(stbi__err("bad BMP") != 0 ? 0 : 0));
}
if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124)
{
return((byte *)(ulong)(stbi__err("unknown BMP") != 0 ? 0 : 0));
}
if (hsz == 12)
{
s.img_x = (uint)stbi__get16le(s);
s.img_y = (uint)stbi__get16le(s);
}
else
{
s.img_x = stbi__get32le(s);
s.img_y = stbi__get32le(s);
}
if (stbi__get16le(s) != 1)
{
return((byte *)(ulong)(stbi__err("bad BMP") != 0 ? 0 : 0));
}
info->bpp = stbi__get16le(s);
if (hsz != 12)
{
var compress = (int)stbi__get32le(s);
if (compress == 1 || compress == 2)
{
return((byte *)(ulong)(stbi__err("BMP RLE") != 0 ? 0 : 0));
}
if (compress >= 4)
{
return((byte *)(ulong)(stbi__err("BMP JPEG/PNG") != 0 ? 0 : 0));
}
if (compress == 3 && info->bpp != 16 && info->bpp != 32)
{
return((byte *)(ulong)(stbi__err("bad BMP") != 0 ? 0 : 0));
}
stbi__get32le(s);
stbi__get32le(s);
stbi__get32le(s);
stbi__get32le(s);
stbi__get32le(s);
if (hsz == 40 || hsz == 56)
{
if (hsz == 56)
{
stbi__get32le(s);
stbi__get32le(s);
stbi__get32le(s);
stbi__get32le(s);
}
if (info->bpp == 16 || info->bpp == 32)
{
if (compress == 0)
{
stbi__bmp_set_mask_defaults(info, compress);
}
else if (compress == 3)
{
info->mr = stbi__get32le(s);
info->mg = stbi__get32le(s);
info->mb = stbi__get32le(s);
info->extra_read += 12;
if (info->mr == info->mg && info->mg == info->mb)
{
return((byte *)(ulong)(stbi__err("bad BMP") != 0 ? 0 : 0));
}
}
else
{
return((byte *)(ulong)(stbi__err("bad BMP") != 0 ? 0 : 0));
}
}
}
else
{
var i = 0;
if (hsz != 108 && hsz != 124)
{
return((byte *)(ulong)(stbi__err("bad BMP") != 0 ? 0 : 0));
}
info->mr = stbi__get32le(s);
info->mg = stbi__get32le(s);
info->mb = stbi__get32le(s);
info->ma = stbi__get32le(s);
if (compress != 3)
{
stbi__bmp_set_mask_defaults(info, compress);
}
stbi__get32le(s);
for (i = 0; i < 12; ++i)
{
stbi__get32le(s);
}
if (hsz == 124)
{
stbi__get32le(s);
stbi__get32le(s);
stbi__get32le(s);
stbi__get32le(s);
}
}
}
return((void *)1);
}
){kind=link}