From 1c8de02c8d3d733e4c31109d3e3497c4177c1323 Mon Sep 17 00:00:00 2001
From: Gregory Hainaut <gregory.hainaut@gmail.com>
Date: Fri, 10 Jun 2016 20:44:35 +0200
Subject: [PATCH] gsdx ogl: trace shader permutation

Too much permutation is bad for driver performances
---
 plugins/GSdx/GSDeviceOGL.cpp | 56 ++++++++++++++++++++++++++++++++----
 1 file changed, 50 insertions(+), 6 deletions(-)

diff --git a/plugins/GSdx/GSDeviceOGL.cpp b/plugins/GSdx/GSDeviceOGL.cpp
index c85d71f7a2..87970cef12 100644
--- a/plugins/GSdx/GSDeviceOGL.cpp
+++ b/plugins/GSdx/GSDeviceOGL.cpp
@@ -1556,9 +1556,6 @@ void GSDeviceOGL::SetupCBMisc(const GSVector4i& channel)
 
 void GSDeviceOGL::SetupPipeline(const VSSelector& vsel, const GSSelector& gsel, const PSSelector& psel)
 {
-	// *************************************************************
-	// Static
-	// *************************************************************
 	GLuint ps;
 	auto i = m_ps.find(psel);
 
@@ -1569,9 +1566,56 @@ void GSDeviceOGL::SetupPipeline(const VSSelector& vsel, const GSSelector& gsel,
 		ps = i->second;
 	}
 
-	// *************************************************************
-	// Dynamic
-	// *************************************************************
+	{
+#if defined(_DEBUG) && 0
+		// Toggling Shader is bad for the perf. Let's trace parameter that often toggle to detect
+		// potential uber shader possibilities.
+		static PSSelector old_psel;
+		static GLuint old_ps = 0;
+		std::string msg("");
+#define CHECK_STATE(p) if (psel.p != old_psel.p) msg.append(" ").append(#p);
+
+		if (old_ps != ps) {
+
+			CHECK_STATE(tex_fmt);
+			CHECK_STATE(dfmt);
+			CHECK_STATE(depth_fmt);
+			CHECK_STATE(aem);
+			CHECK_STATE(fba);
+			CHECK_STATE(fog);
+			CHECK_STATE(iip);
+			CHECK_STATE(date);
+			CHECK_STATE(atst);
+			CHECK_STATE(fst);
+			CHECK_STATE(tfx);
+			CHECK_STATE(tcc);
+			CHECK_STATE(wms);
+			CHECK_STATE(wmt);
+			CHECK_STATE(ltf);
+			CHECK_STATE(shuffle);
+			CHECK_STATE(read_ba);
+			CHECK_STATE(write_rg);
+			CHECK_STATE(fbmask);
+			CHECK_STATE(blend_a);
+			CHECK_STATE(blend_b);
+			CHECK_STATE(blend_c);
+			CHECK_STATE(blend_d);
+			CHECK_STATE(clr1);
+			CHECK_STATE(pabe);
+			CHECK_STATE(hdr);
+			CHECK_STATE(colclip);
+			// CHECK_STATE(channel);
+			// CHECK_STATE(tcoffsethack);
+			// CHECK_STATE(urban_chaos_hle);
+			// CHECK_STATE(tales_of_abyss_hle);
+			GL_PERF("New PS :%s", msg.c_str());
+		}
+
+		old_psel.key = psel.key;
+		old_ps = ps;
+#endif
+	}
+
 	if (GLLoader::buggy_sso_dual_src)
 		m_shader->BindProgram(m_vs[vsel], m_gs[gsel], ps);
 	else