From 3c50da6fc058ff144fb9d7329dd71dbf9b436ae3 Mon Sep 17 00:00:00 2001
From: Yuri Kunde Schlesner <yuriks@yuriks.net>
Date: Wed, 25 Feb 2015 22:16:01 -0300
Subject: [PATCH] Video core: Fix pixelation/blockiness in textures.
This was caused during morton decoding by me not masking the bits of
each coordinate before merging them, so the bits from x could set bits
in y if it was >255.
---
src/video_core/debug_utils/debug_utils.cpp | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/src/video_core/debug_utils/debug_utils.cpp b/src/video_core/debug_utils/debug_utils.cpp
index 0beb72e6b..795449423 100644
--- a/src/video_core/debug_utils/debug_utils.cpp
+++ b/src/video_core/debug_utils/debug_utils.cpp
@@ -333,9 +333,9 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
// Interleave the lower 3 bits of each coordinate to get the intra-block offsets, which are
// arranged in a Z-order curve. More details on the bit manipulation at:
// https://fgiesen.wordpress.com/2009/12/13/decoding-morton-codes/
- unsigned int i = (x | (y << 8)) & 0x0707; // ---- -210
- i = (i ^ (i << 2)) & 0x1313; // ---2 --10
- i = (i ^ (i << 1)) & 0x1515; // ---2 -1-0
+ unsigned int i = (x & 7) | ((y & 7) << 8); // ---- -210
+ i = (i ^ (i << 2)) & 0x1313; // ---2 --10
+ i = (i ^ (i << 1)) & 0x1515; // ---2 -1-0
i = (i | (i >> 7)) & 0x3F;
if (info.format != Regs::TextureFormat::ETC1 &&