void InitializeBspTags(IO.EndianReader s, Blam.CacheFile cache)
{
// Seek to the scenario's scenario_structure_bsps_block tag_block field
s.Seek(items[0].Offset + 1444, System.IO.SeekOrigin.Begin);
bspTags = new Item[s.ReadInt32()];
uint sbsp_offset = s.ReadPointer();
// Seek to the scenario_structure_bsps_block definitions
s.Seek(sbsp_offset, System.IO.SeekOrigin.Begin);
DatumIndex di = new DatumIndex();
CacheItemBase item = null;
// Process each definition's runtime data
for (int x = 0; x < bspTags.Length; x++)
{
s.Seek(28, System.IO.SeekOrigin.Current);
di.Read(s);
item = items[di.Index];
bspTags[x] = item as CacheItemBase;
// Seek back to the beginning of the definition so the following stream code works
s.Seek(-Halo1.Tags.scenario_structure_bsps_block.kSizeOf, System.IO.SeekOrigin.Current);
// We're actually selectively reading scenario_structure_bsps_block fields here
// The offset actually points to the bsp header, and the bsp comes after that header
item.Offset = s.ReadInt32() + Halo1.Tags.scenario_structure_bsps_header.kSizeOf;
item.Size = s.ReadInt32();
cache.BspAddressMasks.Add(s.ReadUInt32() - (uint)item.Offset); // won't count the header
item.BspIndex = bspCount++;
// Seek to the end of this definition, and thus, the start of the next definition
s.Seek(20, System.IO.SeekOrigin.Current);
}
}
void InitializeBspTags(IO.EndianReader s, Blam.CacheFile cache)
{
// Seek to the scenario's scenario_structure_bsps_block tag_block field
s.Seek(items[0].Offset + 1444, System.IO.SeekOrigin.Begin);
bspTags = new Item[s.ReadInt32()];
uint sbsp_offset = s.ReadPointer();
// Seek to the scenario_structure_bsps_block definitions
s.Seek(sbsp_offset, System.IO.SeekOrigin.Begin);
DatumIndex di = new DatumIndex();
CacheItemBase item = null;
// Process each definition's runtime data
for (int x = 0; x < bspTags.Length; x++)
{
s.Seek(28, System.IO.SeekOrigin.Current);
di.Read(s);
item = items[di.Index];
bspTags[x] = item as CacheItemBase;
// Seek back to the beginning of the definition so the following stream code works
s.Seek(-Halo1.Tags.scenario_structure_bsps_block.kSizeOf, System.IO.SeekOrigin.Current);
// We're actually selectively reading scenario_structure_bsps_block fields here
// The offset actually points to the bsp header, and the bsp comes after that header
item.Offset = s.ReadInt32() + Halo1.Tags.scenario_structure_bsps_header.kSizeOf;
item.Size = s.ReadInt32();
cache.BspAddressMasks.Add(s.ReadUInt32() - (uint)item.Offset); // won't count the header
item.BspIndex = bspCount++;
// Seek to the end of this definition, and thus, the start of the next definition
s.Seek(20, System.IO.SeekOrigin.Current);
}
}
public override void Read(BlamLib.IO.EndianReader s)
{
CacheFile cache = s.Owner as CacheFile;
tagsOffset = (uint)(cache.Header.OffsetToIndex + cache.HeaderHalo2.IndexStreamSize);
bool is_alpha = cache.EngineVersion == BlamVersion.Halo2_Alpha;
bool is_echo = cache.EngineVersion == BlamVersion.Halo2_Epsilon;
bool is_pc = cache.EngineVersion == BlamVersion.Halo2_PC;
bool is_mp = cache.HeaderHalo2.CacheType == CacheType.Multiplayer;
Managers.BlamDefinition bdef = Program.GetManager(cache.EngineVersion);
uint tags_addressmask;
if (!is_pc)
{
cache.AddressMask =
bdef[cache.EngineVersion].CacheTypes.BaseAddress - (uint)cache.Header.OffsetToIndex;
tags_addressmask =
(uint)(cache.Header.OffsetToIndex + cache.HeaderHalo2.IndexStreamSize);
}
else
{
// pc maps use virtual addresses which are actually offsets relative to
// the start of the tag memory buffer. since these are offsets and not actually
// addresses which we would normally mask the base off of, we have to do some
// number magic so our subtraction operations actually end up working in reverse
// to get the correct file offset
tags_addressmask = 0 - (uint)cache.Header.OffsetToIndex;
cache.AddressMask = tags_addressmask;
}
#region version dependant loading
if (is_alpha)
{
groupTagsAddress = address = s.ReadUInt32();
groupTagsCount = 0;
scenario.Read(s);
s.ReadInt32(); // crc
tagCount = s.ReadInt32();
items = new CacheItem[tagCount];
s.ReadInt32(); // 'tags'
}
else if (is_pc)
{
groupTagsAddress = s.ReadPointer(); // offset (relative to the tag index offset)
groupTagsCount = s.ReadInt32();
uint offset = s.ReadPointer(); // offset (relative to the tag index offset) to the tag entries
scenario.Read(s);
gameGlobals.Read(s);
s.ReadInt32(); // crc
tagCount = s.ReadInt32();
items = new CacheItem[tagCount];
s.ReadInt32(); // 'tags'
s.Seek(offset /*- 32, System.IO.SeekOrigin.Current*/); // go to the first tag entry
}
else
{
groupTagsAddress = s.ReadUInt32();
groupTagsCount = s.ReadInt32();
address = s.ReadUInt32();
scenario.Read(s);
gameGlobals.Read(s);
s.ReadInt32(); // crc
tagCount = s.ReadInt32();
items = new CacheItem[tagCount];
s.ReadInt32(); // 'tags'
s.Seek(groupTagsCount * 12, System.IO.SeekOrigin.Current); // go to the first tag entry
}
this.groupTagsOffset = this.groupTagsAddress - s.BaseAddress;
#endregion
CacheItem item;
uint temp_pos = 0;
uint sbsp_offset = 0;
DatumIndex[] ltmps = null;
Tags.scenario_structure_bsp_reference_block bsp_block = new Tags.scenario_structure_bsp_reference_block();
if (is_pc) // MP maps need this adjustment
{
cache.AddressMask = tags_addressmask += cache.HeaderHalo2.PcFields.VirtualAddress;
}
for (int x = 0; x < items.Length; x++)
{
item = new CacheItem();
items[x] = item;
if (is_alpha)
{
item.ReadAlpha(s);
}
else
{
item.Read(s);
}
if (item.Location == ItemLocation.Unknown)
{
items[x] = CacheItem.Null;
}
else if (is_pc && item.HasExternalData)
{
HasExternalTags = true;
}
}
if (!is_pc)
{
// While the tag definitions come right after the tag header in a cache file, when
// finally loaded into game memory this isn't the case. The 'stream' size of the tag
// header is how much actual memory is used by map's generated the tag header, but the
// map's tag header may not utilize the entire memory space dedicated to it in game memory.
// So, the game would read the tag header data using the offset and 'stream' size data from
// the cache header, then it would seek to offset+stream_size to get to the tag definitions
// which it would then read into game memory at the memory location defined by 'address'
tags_addressmask =
items[0].Address - tags_addressmask;
cache.AddressMask = tags_addressmask;
for (int x = 0; x < items.Length; x++)
{
item = items[x];
item.Offset = (int)(item.Address - tags_addressmask);
#region on scnr tag
if (!is_alpha && !is_echo && TagGroups.scnr.ID == item.GroupTag.ID)
{
temp_pos = s.PositionUnsigned;
//if (is_alpha || is_echo)
// s.Seek(item.Offset + 828);
//else
s.Seek(item.Offset + 528);
bspTags = new Item[s.ReadInt32()];
sbsp_offset = s.ReadPointer();
ltmps = new DatumIndex[bspTags.Length];
s.Seek(temp_pos);
}
#endregion
#region on sbsp tag
else if (!is_alpha && !is_echo && TagGroups.sbsp.ID == item.GroupTag.ID)
{
temp_pos = s.PositionUnsigned;
s.Seek(sbsp_offset + (uint)(bspCount *
Halo2.Tags.scenario_structure_bsp_reference_block.kRuntimeSizeOf));
bspTags[bspCount] = item;
bsp_block.Read(cache);
if (bsp_block.RuntimeOffset != 0)
{
item.Offset = bsp_block.RuntimeOffset;
item.Size = bsp_block.RuntimeSize;
item.Address = (uint)bsp_block.RuntimeAddress.Value;
//cache.BspAddressMasks.Add((uint)(item.Address - item.Offset));
}
ltmps[bspCount] = bsp_block.Lightmap.Datum;
item.BspIndex = bspCount++;
s.Seek(temp_pos);
}
#endregion
}
}
#region alpha tag name code
if (is_alpha)
{
// following the tag datums in alpha builds is the tag names buffer
foreach (Halo2.CacheItem ci in items)
{
ci.TagNameOffset = s.PositionUnsigned;
ci.ReferenceName = cache.References.AddOptimized(ci.GroupTag, s.ReadCString());
}
}
#endregion
#region retail tag name & bsp offset fixup code
else
{
// Build the absolute tag name offsets
s.Seek(cache.HeaderHalo2.TagNameIndicesOffset);
int[] offsets = new int[tagCount];
for (int x = 0; x < offsets.Length; x++)
{
int offset = s.ReadInt32();
// Offset will be -1 if the tag in question is 'null'
if (offset != -1)
{
offset += cache.HeaderHalo2.TagNamesBufferOffset;
}
offsets[x] = offset;
}
// Fixup all tag instances which are named
for (int x = 0; x < tagCount; x++)
{
if (offsets[x] != -1)
{
FixupTagInstanceHeaderName(cache, items[x], offsets[x], s);
}
}
// PC maps store all zones in the tag memory, they don't need to swap out and thus don't
// need any fix ups (durrr, PCs have loltons of RAM)
if (!is_pc && !is_echo)
{
var head = new Halo2.Tags.scenario_structure_bsps_header();
foreach (CacheItem tmp_item in bspTags)
{
s.Seek(tmp_item.Offset);
head.Read(cache);
// bsp
uint bsp_address_mask = head.FixupBspInstanceHeader(tmp_item, s.Position);
cache.BspAddressMasks.Add(bsp_address_mask);
// ltmp
DatumIndex ltmp_datum = ltmps[tmp_item.BspIndex];
if (ltmp_datum != DatumIndex.Null)
{
head.FixupLightmapInstanceHeader(this.items[ltmp_datum.Index], tmp_item);
}
}
}
}
#endregion
}