From 8c44649f0169c155f514d2de3d3bf991f3f52b80 Mon Sep 17 00:00:00 2001
From: Gliniak <Gliniak93@gmail.com>
Date: Sat, 16 Mar 2024 19:31:00 +0100
Subject: [PATCH] [GPU] Another attempt to fix memleaks caused by
 depth_bias_slope_scaled

---
 src/xenia/base/math.h      | 13 +++++++++++++
 src/xenia/gpu/draw_util.cc |  2 ++
 2 files changed, 15 insertions(+)

diff --git a/src/xenia/base/math.h b/src/xenia/base/math.h
index f244b1ff1..5d81bee9a 100644
--- a/src/xenia/base/math.h
+++ b/src/xenia/base/math.h
@@ -597,6 +597,19 @@ inline T sat_sub(T a, T b) {
   }
   return T(result);
 }
+
+template <typename T>
+inline T roundToNearestOrderOfMagnitude(T value) {
+  if (!value) {
+    return value;
+  }
+
+  const double order = std::pow(10, std::floor(std::log10(std::fabs(value))));
+  const double rounded = std::round(value / order) * order;
+
+  return static_cast<T>(rounded);
+}
+
 namespace divisors {
 union IDivExtraInfo {
   uint32_t value_;
diff --git a/src/xenia/gpu/draw_util.cc b/src/xenia/gpu/draw_util.cc
index 879313d38..e3cd3acc9 100644
--- a/src/xenia/gpu/draw_util.cc
+++ b/src/xenia/gpu/draw_util.cc
@@ -95,6 +95,8 @@ void GetPreferredFacePolygonOffset(const RegisterFile& regs,
         !pa_su_sc_mode_cntl.cull_front) {
       scale = regs[XE_GPU_REG_PA_SU_POLY_OFFSET_FRONT_SCALE].f32;
       offset = regs[XE_GPU_REG_PA_SU_POLY_OFFSET_FRONT_OFFSET].f32;
+
+      scale = roundToNearestOrderOfMagnitude(scale);
     }
     if (pa_su_sc_mode_cntl.poly_offset_back_enable &&
         !pa_su_sc_mode_cntl.cull_back && !scale && !offset) {