From f7c7cc54ed3c8e8d9e0d649421a919066b899dd9 Mon Sep 17 00:00:00 2001
From: DrChat <arkolbed@gmail.com>
Date: Mon, 30 Apr 2018 11:01:46 -0500
Subject: [PATCH] [GPU] TextureInfo::GetMaxMipLevels

---
 src/xenia/gpu/texture_info.cc | 5 +++++
 src/xenia/gpu/texture_info.h  | 2 ++
 2 files changed, 7 insertions(+)

diff --git a/src/xenia/gpu/texture_info.cc b/src/xenia/gpu/texture_info.cc
index 13cf23c81..655249304 100644
--- a/src/xenia/gpu/texture_info.cc
+++ b/src/xenia/gpu/texture_info.cc
@@ -204,6 +204,11 @@ void TextureInfo::CalculateTextureSizesCube(uint32_t width, uint32_t height,
   input_length = size_cube.input_face_length * 6;
 }
 
+uint32_t TextureInfo::GetMaxMipLevels(uint32_t width, uint32_t height,
+                                      uint32_t depth) {
+  return 1 + xe::log2_floor(std::max({width, height, depth}));
+}
+
 bool TextureInfo::GetPackedTileOffset(const TextureInfo& texture_info,
                                       uint32_t* out_offset_x,
                                       uint32_t* out_offset_y) {
diff --git a/src/xenia/gpu/texture_info.h b/src/xenia/gpu/texture_info.h
index 3228a4768..821d5134b 100644
--- a/src/xenia/gpu/texture_info.h
+++ b/src/xenia/gpu/texture_info.h
@@ -304,6 +304,8 @@ struct TextureInfo {
                              uint32_t width, uint32_t height,
                              TextureInfo* out_info);
 
+  static uint32_t GetMaxMipLevels(uint32_t width, uint32_t height,
+                                  uint32_t depth);
   static bool GetPackedTileOffset(const TextureInfo& texture_info,
                                   uint32_t* out_offset_x,
                                   uint32_t* out_offset_y);