From d10f6a6afc401d4d1dad5491413113d4da542956 Mon Sep 17 00:00:00 2001
From: riidefi <34194588+riidefi@users.noreply.github.com>
Date: Thu, 21 Jan 2021 00:05:03 -0700
Subject: [PATCH] :bug: TEX0: Automate LOD range calculation

---
 source/plugins/g3d/io/TEX0.cpp | 7 +++++--
 source/plugins/g3d/texture.hpp | 1 +
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/source/plugins/g3d/io/TEX0.cpp b/source/plugins/g3d/io/TEX0.cpp
index 74095b5f9..b10a3c46c 100644
--- a/source/plugins/g3d/io/TEX0.cpp
+++ b/source/plugins/g3d/io/TEX0.cpp
@@ -19,8 +19,9 @@ void writeTexture(const Texture& data, oishii::Writer& writer,
   writer.write<u16>(data.height);
   writer.write<u32>(static_cast<u32>(data.format));
   writer.write<u32>(data.mipLevel);
-  writer.write<f32>(data.minLod);
-  writer.write<f32>(data.maxLod);
+  writer.write<f32>(data.custom_lod ? data.minLod : 0.0f);
+  writer.write<f32>(data.custom_lod ? data.maxLod
+                                    : static_cast<float>(data.mipLevel - 1));
   writer.write<u32>(0); // src path
   writer.write<u32>(0); // user data
   writer.alignTo(32);   // Assumes already 32b aligned
@@ -48,6 +49,8 @@ void readTexture(Texture& data, oishii::BinaryReader& reader) {
   data.mipLevel = reader.read<u32>();
   data.minLod = reader.read<f32>();
   data.maxLod = reader.read<f32>();
+  data.custom_lod = data.minLod != 0.0f ||
+                    data.maxLod != static_cast<float>(data.mipLevel - 1);
   data.sourcePath = readName(reader, start);
   // Skip user data
   reader.seekSet(start + ofsTex);
diff --git a/source/plugins/g3d/texture.hpp b/source/plugins/g3d/texture.hpp
index d1d5fd259..d097aa919 100644
--- a/source/plugins/g3d/texture.hpp
+++ b/source/plugins/g3d/texture.hpp
@@ -16,6 +16,7 @@ struct TextureData {
   u32 height = 32;
 
   u32 mipLevel{1}; // 1 - no mipmaps
+  bool custom_lod = false;
   f32 minLod{0.0f};
   f32 maxLod{1.0f};