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Add LZ11 Decompression

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- Add getetrs for bclim
- Correctly load all bclim data
- Fix RGB565ToRGBA converter to support all sizes possible
This commit is contained in:
tobid7
2026-01-03 01:54:30 +01:00
parent 866acf32e0
commit e4fa2202d2
6 changed files with 69 additions and 12 deletions
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52
source/lz11.cpp
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@@ -37,7 +37,7 @@ ctrff::u32 GetOccurenceLength(const ctrff::u8* new_ptr, u32 new_len,
CTRFF_API std::vector<ctrff::u8> Compress(const std::vector<ctrff::u8>& in) {
if (in.size() > 0xFFFFFF) {
std::cout << "ERROR: LZ11 input is too large!" << std::endl;
throw std::runtime_error("[ctrff] LZ11: Input is tool large to compress");
return std::vector<ctrff::u8>();
}
std::stringstream s;
@@ -121,5 +121,55 @@ CTRFF_API std::vector<ctrff::u8> Compress(const std::vector<ctrff::u8>& in) {
std::string tmp = s.str();
return std::vector<u8>(tmp.begin(), tmp.end());
}
// Baed on
// https://github.com/Gericom/EveryFileExplorer/blob/master/CommonCompressors/LZ11.cs
// Needs some fixes cause this code looks very unsafe to me tbh
CTRFF_API std::vector<ctrff::u8> Decompress(const std::vector<ctrff::u8>& in) {
if (!in.size()) {
throw std::runtime_error("[ctrff] LZ11: Cannot decompress empty buffer!");
}
if (in[0] != 0x11) {
throw std::runtime_error("[ctrff] LZ11: Not a lz11 file!");
}
u32 len = in[1] | (in[2] << 8) | (in[3] << 16);
std::vector<u8> ret(len, 0x0);
int off = 4;
int dst_off = 0;
while (true) {
u8 header = in[off++];
for (int i = 0; i < 8; i++) {
if ((header & 0x80) == 0) {
ret[dst_off++] = in[off++];
} else {
u8 a = in[off++];
int off2;
int length;
if ((a >> 4) == 0) {
u8 b = in[off++];
u8 c = in[off++];
length = (((a & 0xF) << 4) | (b >> 4)) + 0x11;
off2 = (((b & 0xF) << 8) | c) + 1;
} else if ((a >> 4) == 1) {
u8 b = in[off++];
u8 c = in[off++];
u8 d = in[off++];
length = (((a & 0xF) << 12) | (b << 4) | (c >> 4)) + 0x111;
off2 = (((c & 0xF) << 8) | d) + 1;
} else {
u8 b = in[off++];
off2 = (((a & 0xF) << 8) | b) + 1;
length = (a >> 4) + 1;
}
for (int j = 0; j < length; j++) {
ret[dst_off] = ret[dst_off - off2];
dst_off++;
}
}
if (dst_off >= len) return ret;
header <<= 1;
}
}
}
} // namespace LZ11
} // namespace ctrff