Replace manual calculations with std::lerp and std::midpoint

1 files changed, 5 insertions, 2 deletions

diff --git a/Source/Core/VideoCommon/TextureDecoder_Generic.cpp b/Source/Core/VideoCommon/TextureDecoder_Generic.cpp
index 835ddb523e..04dd0456b2 100644
--- a/Source/Core/VideoCommon/TextureDecoder_Generic.cpp
+++ b/Source/Core/VideoCommon/TextureDecoder_Generic.cpp
@@ -5,6 +5,7 @@
 
 #include <algorithm>
 #include <cmath>
+#include <numeric>
 
 #include "Common/CPUDetect.h"
 #include "Common/CommonTypes.h"
@@ -151,8 +152,10 @@ static void DecodeDXTBlock(u32* dst, const DXTBlock* src, int pitch)
   {
     // color[3] is the same as color[2] (average of both colors), but transparent.
     // This differs from DXT1 where color[3] is transparent black.
-    colors[2] = MakeRGBA((red1 + red2) / 2, (green1 + green2) / 2, (blue1 + blue2) / 2, 255);
-    colors[3] = MakeRGBA((red1 + red2) / 2, (green1 + green2) / 2, (blue1 + blue2) / 2, 0);
+    colors[2] = MakeRGBA(std::midpoint(red1, red2), std::midpoint(green1, green2),
+                         std::midpoint(blue1, blue2), 255);
+    colors[3] = MakeRGBA(std::midpoint(red1, red2), std::midpoint(green1, green2),
+                         std::midpoint(blue1, blue2), 0);
   }
 
   for (int y = 0; y < 4; y++)