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Improved resource packing, possibly

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dexy 2024-07-19 15:24:02 +10:00
parent 5fe554f9b3
commit 5d3849b682
1 changed files with 189 additions and 6 deletions
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191
CodeWalker.Core/GameFiles/Resources/ResourceBuilder.cs
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@ -328,6 +328,189 @@ namespace CodeWalker.GameFiles
}
public static void AssignPositions2(IList<IResourceBlock> blocks, uint basePosition, out RpfResourcePageFlags pageFlags, uint maxPageCount)
{
if ((blocks.Count > 0) && (blocks[0] is Meta))//TODO: try remove this?
{
//use naive packing strategy for Meta resources, due to crashes caused by the improved packing
AssignPositionsForMeta(blocks, basePosition, out pageFlags);
return;
}
//find optimal BaseShift value for the smallest block size
//for small system blocks should be 0, but for large physical blocks can be much bigger
//also, the largest block needs to fit into the largest page.
//BaseSize = 0x2000 << BaseShift (max BaseShift = 0xF)
//then allocate page counts for the page sizes:
//allows for 5 page sizes, each double the size of the previous, with max counts 0x7F, 0x3F, 0xF, 3, 1
//also allows for 4 tail pages, each half the size of the previous, only one page of each size
var sys = (basePosition == 0x50000000);
var maxPageSizeMult = 16L;//the biggest page is 16x the base page size.
var maxPageSize = (0x2000 << 0xF) * maxPageSizeMult; //this is the size of the biggest possible page [256MB!]
var maxBlockSize = 0L;
var minBlockSize = (blocks.Count == 0) ? 0 : maxPageSize;
foreach (var block in blocks)
{
if (block.BlockLength > maxBlockSize) maxBlockSize = block.BlockLength;
if (block.BlockLength < minBlockSize) minBlockSize = block.BlockLength;
}
var baseShift = 0;//want to find the best value for this
var baseSize = 0x2000L;//corresponding size for the baseShift value
while (((baseSize < minBlockSize) || ((baseSize * maxPageSizeMult) < maxBlockSize)) && (baseShift < 0xF))
{
baseShift++;
baseSize = 0x2000L << baseShift;
}
if ((baseSize * maxPageSizeMult) < maxBlockSize) throw new Exception("Unable to fit largest block!");
var sortedBlocks = new List<IResourceBlock>();
var rootBlock = (sys && (blocks.Count > 0)) ? blocks[0] : null;
foreach (var block in blocks)
{
if (block == null) continue;
if (block != rootBlock) sortedBlocks.Add(block);
}
sortedBlocks.Sort((a, b) => b.BlockLength.CompareTo(a.BlockLength));
if (rootBlock != null) sortedBlocks.Insert(0, rootBlock);
var pageCounts = new uint[5];
var pageSizes = new List<long>[5];
var blockPages = new Dictionary<IResourceBlock, (int, int, long)>();//(pageSizeIndex, pageIndex, offset)
while (true)
{
for (int i = 0; i < 5; i++)
{
pageCounts[i] = 0;
pageSizes[i] = null;
}
var testOk = true;
var largestPageSizeI = 0;
var largestPageSize = baseSize;
while (largestPageSize < maxBlockSize)
{
largestPageSizeI++;
largestPageSize *= 2;
}
for (int i = 0; i < sortedBlocks.Count; i++)
{
var block = sortedBlocks[i];
var size = block.BlockLength;
if (i == 0)//first block should always go in the first page, it's either root block or largest
{
pageSizes[largestPageSizeI] = new List<long>() { size };//allocate the first new page
blockPages[block] = (largestPageSizeI, 0, 0);
}
else
{
var pageSizeIndex = 0;
var pageSize = baseSize;
while ((size > pageSize) && (pageSizeIndex < largestPageSizeI))//find the smallest page that will fit this block
{
pageSizeIndex++;
pageSize *= 2;
}
var found = false;//find an existing page of this size or larger which has space
var testPageSizeI = pageSizeIndex;
var testPageSize = pageSize;
while ((found == false) && (testPageSizeI <= largestPageSizeI))
{
var list = pageSizes[testPageSizeI];
if (list != null)
{
for (int p = 0; p < list.Count; p++)
{
var s = list[p];
s += ((ALIGN_SIZE - (s % ALIGN_SIZE)) % ALIGN_SIZE);
var o = s;
s += size;
if (s <= testPageSize)
{
list[p] = s;
found = true;
blockPages[block] = (testPageSizeI, p, o);
break;
}
}
}
testPageSizeI++;
testPageSize *= 2;
}
if (found == false)//couldn't find an existing page for this block, so allocate a new page
{
var list = pageSizes[pageSizeIndex];
if (list == null)
{
list = new List<long>();
pageSizes[pageSizeIndex] = list;
}
var pageIndex = list.Count;
list.Add(size);
blockPages[block] = (pageSizeIndex, pageIndex, 0);
}
}
}
var totalPageCount = 0u;
for (int i = 0; i < 5; i++)
{
var pc = (uint)(pageSizes[i]?.Count ?? 0);
pageCounts[i] = pc;
totalPageCount += pc;
}
if (totalPageCount > maxPageCount) testOk = false;
if (pageCounts[0] > 0x7F) testOk = false;
if (pageCounts[1] > 0x3F) testOk = false;
if (pageCounts[2] > 0xF) testOk = false;
if (pageCounts[3] > 0x3) testOk = false;
if (pageCounts[4] > 0x1) testOk = false;
if (testOk) break;//everything fits, so we're done here
if (baseShift >= 0xF) throw new Exception("Unable to pack blocks with largest possible base!");
baseShift++;
baseSize = 0x2000 << baseShift;
}
var pageOffset = 0L;//pages are allocated, assign actual positions
var pageOffsets = new long[5];//base offsets for each page size
for (int i = 4; i >= 0; i--)
{
pageOffsets[i] = pageOffset;
var pageSize = baseSize * (1 << i);
var pageCount = pageCounts[i];
pageOffset += (pageSize * pageCount);
}
foreach (var kvp in blockPages)
{
var block = kvp.Key;
var pageSizeIndex = kvp.Value.Item1;
var pageIndex = kvp.Value.Item2;
var offset = kvp.Value.Item3;
var pageSize = baseSize * (1 << pageSizeIndex);
var blockPosition = pageOffsets[pageSizeIndex] + (pageSize * pageIndex) + offset;
block.FilePosition = basePosition + blockPosition;
}
var v = (uint)baseShift & 0xF;
v += (pageCounts[4] & 0x1) << 4;
v += (pageCounts[3] & 0x3) << 5;
v += (pageCounts[2] & 0xF) << 7;
v += (pageCounts[1] & 0x3F) << 11;
v += (pageCounts[0] & 0x7F) << 17;
pageFlags = new RpfResourcePageFlags(v);
}
public static byte[] Build(ResourceFileBase fileBase, int version, bool compress = true)
{
@ -337,11 +520,11 @@ namespace CodeWalker.GameFiles
IList<IResourceBlock> graphicBlocks;
GetBlocks(fileBase, out systemBlocks, out graphicBlocks);
RpfResourcePageFlags systemPageFlags;
AssignPositions(systemBlocks, 0x50000000, out systemPageFlags, 128);
//AssignPositions(systemBlocks, 0x50000000, out var systemPageFlags, 128);
//AssignPositions(graphicBlocks, 0x60000000, out var graphicsPageFlags, 128 - systemPageFlags.Count);
RpfResourcePageFlags graphicsPageFlags;
AssignPositions(graphicBlocks, 0x60000000, out graphicsPageFlags, 128 - systemPageFlags.Count);
AssignPositions2(systemBlocks, 0x50000000, out var systemPageFlags, 128);
AssignPositions2(graphicBlocks, 0x60000000, out var graphicsPageFlags, 128 - systemPageFlags.Count);
fileBase.FilePagesInfo.SystemPagesCount = (byte)systemPageFlags.Count;