GS/HW: Improve full dirty rect clears. Remember new EE draws.

Rocky Legends transfers the new frame sometimes just before vsync, and it was getting lost.

pcsx2/GS/GSState.cpp

@@ -26,6 +26,7 @@
 #include <iomanip> // Dump Verticles
 
 int GSState::s_n = 0;
+int GSState::s_last_transfer_draw_n = 0;
 int GSState::s_transfer_n = 0;
 
 static __fi bool IsAutoFlushEnabled()
@@ -1780,6 +1781,7 @@ void GSState::Write(const u8* mem, int len)
 		r.right = r.left + m_env.TRXREG.RRW;
 		r.bottom = r.top + m_env.TRXREG.RRH;
 
+		s_last_transfer_draw_n = s_n;
 		// Store the transfer for preloading new RT's.
 		if ((m_draw_transfers.size() > 0 && blit.DBP == m_draw_transfers.back().blit.DBP))
 		{
@@ -1982,6 +1984,8 @@ void GSState::Move()
 	r.top = m_env.TRXPOS.DSAY;
 	r.right = r.left + m_env.TRXREG.RRW;
 	r.bottom = r.top + m_env.TRXREG.RRH;
+
+	s_last_transfer_draw_n = s_n;
 	// Store the transfer for preloading new RT's.
 	if ((m_draw_transfers.size() > 0 && m_env.BITBLTBUF.DBP == m_draw_transfers.back().blit.DBP))
 	{

pcsx2/GS/GSState.h

@@ -237,6 +237,7 @@ public:
 	std::vector<GSUploadQueue> m_draw_transfers;
 
 	static int s_n;
+	static int s_last_transfer_draw_n;
 	static int s_transfer_n;
 
 	static constexpr u32 STATE_VERSION = 8;

pcsx2/GS/Renderers/HW/GSRendererHW.cpp

@@ -130,8 +130,25 @@ void GSRendererHW::VSync(u32 field, bool registers_written, bool idle_frame)
 			}
 		}
 	}
-	else
+	else if (!idle_frame)
-		m_draw_transfers.clear();
+	{
+		// If it did draws very recently, we should keep the recent stuff in case it hasn't been preloaded/used yet.
+		// Rocky Legend does this with the main menu FMV's.
+		if (s_last_transfer_draw_n == s_n)
+		{
+			for (auto iter = m_draw_transfers.begin(); iter != m_draw_transfers.end();)
+			{
+				if ((s_n - iter->draw) > 5)
+					iter = m_draw_transfers.erase(iter);
+				else
+				{
+					iter++;
+				}
+			}
+		}
+		else
+			m_draw_transfers.clear();
+	}
 
 	if (GSConfig.LoadTextureReplacements)
 		GSTextureReplacements::ProcessAsyncLoadedTextures();

pcsx2/GS/Renderers/HW/GSTextureCache.cpp

@@ -99,7 +99,7 @@ bool GSTextureCache::FullRectDirty(Target* target)
 	RGBAMask rgba;
 	rgba._u32 = GSUtil::GetChannelMask(target->m_TEX0.PSM);
 	// One complete dirty rect, not pieces (Add dirty rect function should be able to join these all together).
-	if (target->m_age > 2 && target->m_dirty.size() == 1 && rgba._u32 == target->m_dirty[0].rgba._u32 && target->m_valid.rintersect(target->m_dirty[0].r).eq(target->m_valid))
+	if (target->m_age != 0 && target->m_dirty.size() == 1 && rgba._u32 == target->m_dirty[0].rgba._u32 && target->m_valid.rintersect(target->m_dirty[0].r).eq(target->m_valid))
 	{
 		return true;
 	}