From 4611264ce37228abc47dccf6f0029414ca9412e2 Mon Sep 17 00:00:00 2001
From: Gregory Hainaut <gregory.hainaut@gmail.com>
Date: Mon, 11 Apr 2016 16:02:57 +0200
Subject: [PATCH] gsdx: add CRC hack for Nocturne PAL

Reduce depth transfer to the real size of the game. Otherwise
we need to handle a mix of color/depth transfer.
---
 plugins/GSdx/GSState.cpp        | 22 ++++++++++++++++++++++
 plugins/GSdx/GSTextureCache.cpp |  2 +-
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/plugins/GSdx/GSState.cpp b/plugins/GSdx/GSState.cpp
index 99f6ca5c40..6b18ed375a 100644
--- a/plugins/GSdx/GSState.cpp
+++ b/plugins/GSdx/GSState.cpp
@@ -1527,6 +1527,28 @@ void GSState::Write(const uint8* mem, int len)
 
 	const GSLocalMemory::psm_t& psm = GSLocalMemory::m_psm[m_env.BITBLTBUF.DPSM];
 
+	/*
+	 *  The game uses a resolution of 512x244. RT is located at 0x700 and depth at 0x0
+	 *
+	 * #Bug number 1. (bad top bar)
+	 * The game saves the depth buffer in the EE but with a resolution of
+	 * 512x255. So it is ending to 0x7F8, ouch it saves the top of the RT too.
+	 *
+	 * #Bug number 2. (darker screen)
+	 * The game will restore the previously saved buffer at position 0x0 to
+	 * 0x7F8.  Because of the extra RT pixels, GSdx will partialy invalidate
+	 * the texture located at 0x700. Next access will generate a cache miss
+	 *
+	 * The no-solution: instead to handle garbage (aka RT) at the end of the
+	 * depth buffer. Let's reduce the size of the transfer
+	 */
+	if (m_game.title == CRC::SMTNocturne) {
+		if (m_env.BITBLTBUF.DBP == 0 && m_env.BITBLTBUF.DPSM == PSM_PSMZ32 && w == 512 && h > 224) {
+			h = 224;
+			m_env.TRXREG.RRH = 224;
+		}
+	}
+
 	// printf("Write len=%d DBP=%05x DBW=%d DPSM=%d DSAX=%d DSAY=%d RRW=%d RRH=%d\n", len, m_env.BITBLTBUF.DBP, m_env.BITBLTBUF.DBW, m_env.BITBLTBUF.DPSM, m_env.TRXPOS.DSAX, m_env.TRXPOS.DSAY, m_env.TRXREG.RRW, m_env.TRXREG.RRH);
 
 	if(!m_tr.Update(w, h, psm.trbpp, len))
diff --git a/plugins/GSdx/GSTextureCache.cpp b/plugins/GSdx/GSTextureCache.cpp
index d5918aa786..f79e7848f0 100644
--- a/plugins/GSdx/GSTextureCache.cpp
+++ b/plugins/GSdx/GSTextureCache.cpp
@@ -726,7 +726,7 @@ void GSTextureCache::InvalidateLocalMem(GSOffset* off, const GSVector4i& r)
 
 	// No depth handling please.
 	if (psm == PSM_PSMZ32 || psm == PSM_PSMZ24 || psm == PSM_PSMZ16 || psm == PSM_PSMZ16S) {
-		GL_INS("ERROR: InvalidateLocalMem depth format isn't supported");
+		GL_INS("ERROR: InvalidateLocalMem depth format isn't supported (%d,%d to %d,%d)", r.x, r.y, r.z, r.w);
 		if (m_can_convert_depth) {
 			for(auto t : m_dst[DepthStencil]) {
 				if(GSUtil::HasSharedBits(bp, psm, t->m_TEX0.TBP0, t->m_TEX0.PSM)) {