- Start work on drawlist

- Fix issue in texloader
- add ivec2 to tecloader / screen
- add draw func for iron
- add bufCfg in 3 variants to c3d
- add poc for c3d_permutation

poc/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.22)
+
+add_subdirectory(c3d_permutation)

poc/README.md

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+# Proof of concepts
+
+This folder contains some proof of concept tests.

poc/c3d_permutation/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.22)
+
+project(c3d-permutation)
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED true)
+
+add_executable(c3d-permutation source/main.cpp)

poc/c3d_permutation/README.md

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+# Citro3D Shader Buf info Permutation calculation
+
+```cpp
+// Why do 
+BufInfo_Add(buf, data, sizeof(data[0]), 3, 0x210);
+BufInfo_Add(buf, data, sizeof(data[0]), 4, 0x3210);
+// if we can do 
+BufInfo_Add(buf, data, sizeof(data[0]), 3, permutation(3));
+BufInfo_Add(buf, data, sizeof(data[0]), 3, permutation(4));
+```

poc/c3d_permutation/source/main.cpp

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+#include <format>
+#include <iostream>
+#include <stdexcept>
+
+using u64 = unsigned long long;
+
+constexpr u64 permutation(int ac) {
+  u64 ret = 0;
+  if (ac < 1 || ac > 15) {
+    throw std::runtime_error("[amy] " + std::to_string(ac) +
+                             " is out of range (1...15)!");
+  }
+  for (int i = 0; i < ac; i++) {
+    ret = (ret << 4) | (ac - 1 - i);
+  }
+  return ret;
+}
+
+int main(int argc, char** argv) {
+  int v = 3;
+  if (argc == 2) {
+    v = std::stoi(argv[1]);
+  } else {
+    std::cout << "No input provided! using example..." << std::endl;
+  }
+  std::cout << std::format("{} -> {:#x} ({})", v, permutation(v),
+                           permutation(v))
+            << std::endl;
+  return 0;
+}