From 561e4a4dd3459f889719b10fae10fd685f3b430d Mon Sep 17 00:00:00 2001
From: mykola2312 <49044616+mykola2312@users.noreply.github.com>
Date: Thu, 31 Aug 2023 06:54:57 +0300
Subject: [PATCH] some discoveries about ESH data types

---
 format.txt        | 21 ++++++++++++++++++++-
 src/fot/esh.rs    |  2 ++
 src/fot/stream.rs |  3 +++
 src/fot/world.rs  |  5 +++++
 4 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/format.txt b/format.txt
index 2d19a58..ad9ee13 100644
--- a/format.txt
+++ b/format.txt
@@ -57,4 +57,23 @@ next zar = <zar> + 0x1A + unk5
         FString name
         uint32_t type
         uint32_t dataSize
-        uint8_t data[dataSize]
\ No newline at end of file
+        uint8_t data[dataSize]
+
+esh data types
+1 - bool, 1 byte
+2 - float, 4 byte
+3 - int32_t/uint32_t
+4 - FString
+5 - entity? FString?
+8 - FString (Sprite)
+11 - esbin
+13 - frame, 48 bytes -- multiply all numbers by 4.0
+    uint8_t unk1[36]
+    float c
+    float b
+    float a
+14 - rect, 16 bytes
+    int32_t top
+    int32_t left
+    int32_t right
+    int32_t bottom
\ No newline at end of file
diff --git a/src/fot/esh.rs b/src/fot/esh.rs
index 535fcc2..5d22a09 100644
--- a/src/fot/esh.rs
+++ b/src/fot/esh.rs
@@ -6,11 +6,13 @@ use super::stream::{ReadStream, WriteStream};
 use anyhow::Result;
 use indexmap::IndexMap;
 
+#[derive(Debug)]
 pub struct ESHValue {
     pub data_type: u32,
     pub data: Vec<u8>
 }
 
+#[derive(Debug)]
 pub struct ESH {
     pub tag: Tag,
     pub props: IndexMap<FString, ESHValue>,
diff --git a/src/fot/stream.rs b/src/fot/stream.rs
index 070923a..d47c27e 100644
--- a/src/fot/stream.rs
+++ b/src/fot/stream.rs
@@ -39,6 +39,9 @@ impl<'a> ReadStream<'a> {
         Ok(self.as_bytes(size)?.to_vec())
     }
 
+    // "size" is not required to be actual size, it's only
+    // a hint for Decoder::decode. Most of the structures are
+    // dynamically determining their decoding and encoding sizes
     pub fn read<T: Decoder>(&mut self, size: usize) -> Result<T> {
         let val = T::decode(&self.raw, self.offset(), size)?;
         self.skip(val.get_enc_size());
diff --git a/src/fot/world.rs b/src/fot/world.rs
index 18e5bfa..940b2f8 100644
--- a/src/fot/world.rs
+++ b/src/fot/world.rs
@@ -3,6 +3,7 @@ use super::fstring::FString;
 use super::raw::Raw;
 use super::sgd::SGD;
 use super::ssg::SSG;
+use super::esh::ESH;
 use super::stream::ReadStream;
 use super::tag::Tag;
 use anyhow::anyhow;
@@ -29,6 +30,10 @@ impl World {
     const WORLD_HDR_LEN: usize = 0x13;
 
     pub fn test(&self) -> Result<()> {
+        let mut rd = ReadStream::new(&self.data, 0x14AC);
+        let esh: ESH = rd.read(0)?;
+        dbg!(&esh);
+
         Ok(())
     }
 }