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update region file format 2 to 3 (WIP)

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This commit is contained in:
MihailRis
2024-09-04 23:37:39 +03:00
parent 73a8343f61
commit 184e9c6648
16 changed files with 295 additions and 57 deletions
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src/coders/compression.cpp
+31 -17
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@@ -25,29 +25,38 @@ static std::shared_ptr<ubyte[]> get_buffer(size_t minSize) {
return nullptr;
}
static auto compress_rle(
const ubyte* src,
size_t srclen,
size_t& len,
size_t(*encodefunc)(const ubyte*, size_t, ubyte*)
) {
auto buffer = get_buffer(srclen * 2);
auto bytes = buffer.get();
std::unique_ptr<ubyte[]> uptr;
if (bytes == nullptr) {
uptr = std::make_unique<ubyte[]>(srclen * 2);
bytes = uptr.get();
}
len = encodefunc(src, srclen, bytes);
if (uptr) {
return uptr;
}
auto data = std::make_unique<ubyte[]>(len);
std::memcpy(data.get(), bytes, len);
return data;
}
std::unique_ptr<ubyte[]> compression::compress(
const ubyte* src, size_t srclen, size_t& len, Method method
) {
switch (method) {
case Method::NONE:
throw std::invalid_argument("compression method is NONE");
case Method::EXTRLE8: {
// max extrle out size is srcLen * 2
auto buffer = get_buffer(srclen * 2);
auto bytes = buffer.get();
std::unique_ptr<ubyte[]> uptr;
if (bytes == nullptr) {
uptr = std::make_unique<ubyte[]>(srclen * 2);
bytes = uptr.get();
}
len = extrle::encode(src, srclen, bytes);
if (uptr) {
return uptr;
}
auto data = std::make_unique<ubyte[]>(len);
std::memcpy(data.get(), bytes, len);
return data;
}
case Method::EXTRLE8:
return compress_rle(src, srclen, len, extrle::encode);
case Method::EXTRLE16:
return compress_rle(src, srclen, len, extrle::encode16);
case Method::GZIP: {
auto buffer = gzip::compress(src, srclen);
auto data = std::make_unique<ubyte[]>(buffer.size());
@@ -71,6 +80,11 @@ std::unique_ptr<ubyte[]> compression::decompress(
extrle::decode(src, srclen, decompressed.get());
return decompressed;
}
case Method::EXTRLE16: {
auto decompressed = std::make_unique<ubyte[]>(dstlen);
extrle::decode16(src, srclen, decompressed.get());
return decompressed;
}
case Method::GZIP: {
auto buffer = gzip::decompress(src, srclen);
if (buffer.size() != dstlen) {