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issue 1957: Added support for reading embedded content (textures) in ASCII FBX. In ASCII FBX embedded content is encoded in Base64 and is surrounded by double quotation marks. The decoding functions are based on those used in the glTF importer.

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This commit is contained in:
Matias Lavik
2019-04-06 19:31:56 +02:00
parent a43ac5b3fd
commit b3177a2a9a
3 changed files with 74 additions and 1 deletions
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43
code/FBXUtil.cpp
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@@ -113,6 +113,49 @@ std::string AddTokenText(const std::string& prefix, const std::string& text, con
text) );
}
static const uint8_t base64DecodeTable[128] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 62, 0, 0, 0, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 0, 0, 0, 64, 0, 0,
0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 0, 0, 0, 0, 0,
0, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 0, 0, 0, 0, 0
};
uint8_t DecodeBase64(char ch)
{
return base64DecodeTable[ch];
}
size_t DecodeBase64(const char* in, size_t inLength, uint8_t*& out)
{
if (inLength < 4) {
out = 0;
return 0;
}
const size_t outLength = (inLength * 3) / 4;
out = new uint8_t[outLength];
memset(out, 0, outLength);
size_t i = 0;
size_t j = 0;
for (i = 0; i < inLength - 4; i += 4)
{
uint8_t b0 = Util::DecodeBase64(in[i]);
uint8_t b1 = Util::DecodeBase64(in[i + 1]);
uint8_t b2 = Util::DecodeBase64(in[i + 2]);
uint8_t b3 = Util::DecodeBase64(in[i + 3]);
out[j++] = (uint8_t)((b0 << 2) | (b1 >> 4));
out[j++] = (uint8_t)((b1 << 4) | (b2 >> 2));
out[j++] = (uint8_t)((b2 << 6) | b3);
}
return outLength;
}
} // !Util
} // !FBX
} // !Assimp