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Duplicate part of LCWCompression to VqaReader

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Duplicates the part needed by the VqaReader,
so we can move LCWCompression to Mods.Cnc
ahead of VQA (which has some additional prerequisites).
This commit is contained in:
reaperrr
2019-12-09 01:45:49 +01:00
committed by teinarss
parent ed618c807d
commit c687600d66
1 changed files with 75 additions and 5 deletions
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80
OpenRA.Mods.Common/FileFormats/VqaReader.cs
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@@ -330,7 +330,7 @@ namespace OpenRA.Mods.Common.FileFormats
Array.Clear(cbf, 0, cbf.Length);
Array.Clear(cbfBuffer, 0, cbfBuffer.Length);
var decodeCount = 0;
decodeCount = LCWCompression.DecodeInto(fileBuffer, cbfBuffer, decodeMode ? 1 : 0, decodeMode);
decodeCount = LCWDecodeInto(fileBuffer, cbfBuffer, decodeMode ? 1 : 0, decodeMode);
if ((videoFlags & 0x10) == 16)
{
var p = 0;
@@ -366,7 +366,7 @@ namespace OpenRA.Mods.Common.FileFormats
if (type == "CBP0")
cbf = (byte[])cbp.Clone();
else
LCWCompression.DecodeInto(cbp, cbf);
LCWDecodeInto(cbp, cbf);
chunkBufferOffset = currentChunkBuffer = 0;
}
@@ -391,7 +391,7 @@ namespace OpenRA.Mods.Common.FileFormats
// Frame data
case "VPTZ":
LCWCompression.DecodeInto(s.ReadBytes(subchunkLength), origData);
LCWDecodeInto(s.ReadBytes(subchunkLength), origData);
// This is the last subchunk
return;
@@ -399,9 +399,9 @@ namespace OpenRA.Mods.Common.FileFormats
Array.Clear(origData, 0, origData.Length);
s.ReadBytes(fileBuffer, 0, subchunkLength);
if (fileBuffer[0] != 0)
vtprSize = LCWCompression.DecodeInto(fileBuffer, origData);
vtprSize = LCWDecodeInto(fileBuffer, origData);
else
LCWCompression.DecodeInto(fileBuffer, origData, 1, true);
LCWDecodeInto(fileBuffer, origData, 1, true);
return;
case "VPTR":
Array.Clear(origData, 0, origData.Length);
@@ -529,5 +529,75 @@ namespace OpenRA.Mods.Common.FileFormats
}
}
}
// TODO: Maybe replace this with LCWCompression.DecodeInto again later
public static int LCWDecodeInto(byte[] src, byte[] dest, int srcOffset = 0, bool reverse = false)
{
var ctx = new FastByteReader(src, srcOffset);
var destIndex = 0;
while (true)
{
var i = ctx.ReadByte();
if ((i & 0x80) == 0)
{
// case 2
var secondByte = ctx.ReadByte();
var count = ((i & 0x70) >> 4) + 3;
var rpos = ((i & 0xf) << 8) + secondByte;
if (destIndex + count > dest.Length)
return destIndex;
// Replicate previous
var srcIndex = destIndex - rpos;
if (srcIndex > destIndex)
throw new NotImplementedException("srcIndex > destIndex {0} {1}".F(srcIndex, destIndex));
for (var j = 0; j < count; j++)
{
if (destIndex - srcIndex == 1)
dest[destIndex + j] = dest[destIndex - 1];
else
dest[destIndex + j] = dest[srcIndex + j];
}
destIndex += count;
}
else if ((i & 0x40) == 0)
{
// case 1
var count = i & 0x3F;
if (count == 0)
return destIndex;
ctx.CopyTo(dest, destIndex, count);
destIndex += count;
}
else
{
var count3 = i & 0x3F;
if (count3 == 0x3E)
{
// case 4
var count = ctx.ReadWord();
var color = ctx.ReadByte();
for (var end = destIndex + count; destIndex < end; destIndex++)
dest[destIndex] = color;
}
else
{
// If count3 == 0x3F it's case 5, else case 3
var count = count3 == 0x3F ? ctx.ReadWord() : count3 + 3;
var srcIndex = reverse ? destIndex - ctx.ReadWord() : ctx.ReadWord();
if (srcIndex >= destIndex)
throw new NotImplementedException("srcIndex >= destIndex {0} {1}".F(srcIndex, destIndex));
for (var end = destIndex + count; destIndex < end; destIndex++)
dest[destIndex] = dest[srcIndex++];
}
}
}
}
}
}