From ff890e3bc8655cff499bc7e9bfad2adf13f6b84f Mon Sep 17 00:00:00 2001
From: Sergey Lipskiy <gonetz@ngs.ru>
Date: Fri, 20 Mar 2015 19:54:26 +0600
Subject: [PATCH] Add special blend mode hack to remove Pilot Wings brown
 boxes.

---
 Config.h   | 1 +
 OpenGL.cpp | 7 ++++---
 RSP.cpp    | 3 +++
 3 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/Config.h b/Config.h
index 18f9f185..7eeaa4ca 100644
--- a/Config.h
+++ b/Config.h
@@ -95,6 +95,7 @@ struct Config
 #define hack_noDepthFrameBuffers	(1<<1)  //Do not use depth buffers as texture
 #define hack_blurPauseScreen		(1<<2)  //Game copies frame buffer to depth buffer area, CPU blurs it. That image is used as background for pause screen.
 #define hack_scoreboard				(1<<3)  //Copy data from RDRAM to auxilary frame buffer. Scoreboard in Mario Tennis.
+#define hack_pilotWings				(1<<4)  //Special blend mode for PilotWings.
 
 extern Config config;
 
diff --git a/OpenGL.cpp b/OpenGL.cpp
index b90312eb..936d6bcb 100644
--- a/OpenGL.cpp
+++ b/OpenGL.cpp
@@ -555,9 +555,10 @@ void OGLRender::_setBlendMode() const
 				glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
 				break;
 		}
-	}
-	else
-	{
+	} else if ((config.generalEmulation.hacks & hack_pilotWings) != 0 && (gDP.otherMode.l & 0x80) != 0) { //CLR_ON_CVG without FORCE_BL
+		glEnable(GL_BLEND);
+		glBlendFunc(GL_ZERO, GL_ONE);
+	} else {
 		glDisable( GL_BLEND );
 	}
 }
diff --git a/RSP.cpp b/RSP.cpp
index c9d54490..c1924652 100644
--- a/RSP.cpp
+++ b/RSP.cpp
@@ -335,6 +335,9 @@ void RSP_Init()
 		config.generalEmulation.hacks |= hack_blurPauseScreen;
 	else if (strstr(RSP.romname, (const char *)"MarioTennis") != NULL)
 		config.generalEmulation.hacks |= hack_scoreboard;
+	else if (strstr(RSP.romname, (const char *)"Pilot Wings64") != NULL)
+		config.generalEmulation.hacks |= hack_pilotWings;
+
 
 	api().FindPluginPath(RSP.pluginpath);