From feb446c3f8aae20b8be29cef0e3160e3d17185a1 Mon Sep 17 00:00:00 2001
From: Sergey Lipskiy <gonetz@ngs.ru>
Date: Wed, 13 Jul 2016 17:14:29 +0600
Subject: [PATCH] Fix checksum calculation for mip-mapped textures.

---
 src/Textures.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Textures.cpp b/src/Textures.cpp
index d9bcaaea..2526ed85 100644
--- a/src/Textures.cpp
+++ b/src/Textures.cpp
@@ -1170,6 +1170,10 @@ struct TextureParams
 static
 u32 _calculateCRC(u32 _t, const TextureParams & _params, u32 _bytes)
 {
+	if (_bytes == 0) {
+		const u32 lineBytes = gSP.textureTile[_t]->line << 3;
+		_bytes = _params.height*lineBytes;
+	}
 	const u64 *src = (u64*)&TMEM[gSP.textureTile[_t]->tmem];
 	u32 crc = 0xFFFFFFFF;
 	crc = CRC_Calculate(crc, src, _bytes);