From e6644af3012b62395db9807b9b3865ff42b12e1b Mon Sep 17 00:00:00 2001
From: Shinovon <arman200711@gmail.com>
Date: Thu, 24 Jul 2025 07:40:02 +0500
Subject: [PATCH 1/3] Fix performance drop when rendering translucent on
 PowerVR MBX

---
 misc/opengl/GLCommon.h |  2 ++
 src/Graphics_GL1.c     | 27 +++++++++++++++++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/misc/opengl/GLCommon.h b/misc/opengl/GLCommon.h
index 9c8b6f0ee..207c7328d 100644
--- a/misc/opengl/GLCommon.h
+++ b/misc/opengl/GLCommon.h
@@ -42,6 +42,8 @@ typedef cc_uintptr GLpointer;
 #define GL_TRIANGLES             0x0004
 #define GL_QUADS                 0x0007
 
+#define GL_ZERO                  0
+#define GL_ONE                   1
 #define GL_BLEND                 0x0BE2
 #define GL_SRC_ALPHA             0x0302
 #define GL_ONE_MINUS_SRC_ALPHA   0x0303
diff --git a/src/Graphics_GL1.c b/src/Graphics_GL1.c
index 02a21331c..4f027d8e1 100644
--- a/src/Graphics_GL1.c
+++ b/src/Graphics_GL1.c
@@ -25,6 +25,8 @@
 #include "../misc/opengl/GL1Funcs.h"
 #if defined CC_BUILD_SYMBIAN
 #include "../misc/opengl/GL2Funcs.h"
+
+static cc_bool mbx;
 #endif
 
 #if CC_BUILD_MAXSTACK <= (64 * 1024)
@@ -84,7 +86,9 @@ void Gfx_Create(void) {
 #ifdef CC_BUILD_GL11_FALLBACK
 	GLContext_GetAll(coreFuncs, Array_Elems(coreFuncs));
 #endif
+#ifndef CC_BUILD_GLES
 	customMipmapsLevels = true;
+#endif
 	Gfx.BackendType     = CC_GFX_BACKEND_GL1;
 
 	GL_InitCommon();
@@ -335,6 +339,17 @@ static void SetAlphaTest(cc_bool enabled) {
 
 void Gfx_DepthOnlyRendering(cc_bool depthOnly) {
 	cc_bool enabled = !depthOnly;
+#ifdef CC_BUILD_SYMBIAN
+	if (mbx) {
+		if (depthOnly) {
+			_glBlendFunc(GL_ZERO, GL_ONE);
+			Gfx_SetAlphaBlending(true);
+		} else {
+			_glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+		}
+		return;
+	}
+#endif
 	SetColorWrite(enabled & gfx_colorMask[0], enabled & gfx_colorMask[1], 
 				  enabled & gfx_colorMask[2], enabled & gfx_colorMask[3]);
 	
@@ -422,6 +437,18 @@ cc_bool Gfx_WarnIfNecessary(void) {
 		Gfx.Limitations |= GFX_LIMIT_VERTEX_ONLY_FOG;
 		return true;
 	}
+#if defined CC_BUILD_SYMBIAN
+	if (String_ContainsConst(&renderer, "SGX")) {
+	} else if (String_ContainsConst(&renderer, "MBX")) {
+		Gfx.Limitations |= GFX_LIMIT_VERTEX_ONLY_FOG;
+		mbx = true;
+	} else if (!String_ContainsConst(&renderer, "HW")) {
+		Chat_AddRaw("&cSoftware rendering is being used, performance will greatly suffer.");
+
+		Gfx.Limitations |= GFX_LIMIT_MINIMAL;
+		return true;
+	}
+#endif
 	return false;
 }
 

From aa11859bdabb3e4465e5ca83b33f56a89285b48e Mon Sep 17 00:00:00 2001
From: Shinovon <arman200711@gmail.com>
Date: Thu, 24 Jul 2025 12:54:13 +0500
Subject: [PATCH 2/3] Symbian: rewrite main loop

---
 src/Window_Symbian.cpp | 60 +++++++++++++++++++++++-------------------
 1 file changed, 33 insertions(+), 27 deletions(-)

diff --git a/src/Window_Symbian.cpp b/src/Window_Symbian.cpp
index f9f7609fc..15d32668c 100644
--- a/src/Window_Symbian.cpp
+++ b/src/Window_Symbian.cpp
@@ -485,35 +485,41 @@ void CCAppUi::HandleCommandL(TInt aCommand) {
 
 // CCContainer implementation
 TInt CCContainer::LoopCallBack(TAny*) {
-	if (!WindowInfo.Exists) {
-		Window_RequestClose();
-		container->iAppUi->Exit();
-		return EFalse;
-	}
-	
-	// launcher -> game -> launcher -> ... loop
-	launcher:
-	if (!gameRunning) {
-		if (Launcher_Tick()) {
-			return ETrue;
+	cc_bool run = false;
+	for (;;) {
+		if (!WindowInfo.Exists) {
+			Window_RequestClose();
+			container->iAppUi->Exit();
+			return EFalse;
 		}
-		Launcher_Finish();
-
-		// run game
-		gameRunning = true;
-		Game_Setup();
-		container->RestartTimerL(100);
+		
+		if (run) {
+			run = false;
+			ProcessProgramArgs(0, 0);
+			Game_Setup();
+			gameRunning = true;
+			container->RestartTimerL(100);
+		}
+		
+		if (!gameRunning) {
+			if (Launcher_Tick()) break;
+			Launcher_Finish();
+			run = true;
+			continue;
+		}
+		
+		if (!Game_Running) {
+			gameRunning = false;
+			Game_Free();
+//			Launcher_Setup();
+//			container->RestartTimerL(10000);
+			WindowInfo.Exists = false;
+			continue;
+		}
+		
+		Game_RenderFrame();
+		break;
 	}
-	
-	if (!Game_Running) {
-		// return to launcher
-		gameRunning = false;
-		Game_Free();
-		Launcher_Setup();
-		container->RestartTimerL(10000);
-		goto launcher;
-	}
-	Game_RenderFrame();
 	return ETrue;
 }
 

From 9b1af5d3af11e50472d9a82baa245280f6045bfd Mon Sep 17 00:00:00 2001
From: Shinovon <arman200711@gmail.com>
Date: Sat, 26 Jul 2025 02:40:44 +0500
Subject: [PATCH 3/3] Try to achieve better performance on MBX by disabling
 things

---
 src/Core.h         | 1 +
 src/Graphics_GL1.c | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Core.h b/src/Core.h
index 3dc3cea14..abe4086b3 100644
--- a/src/Core.h
+++ b/src/Core.h
@@ -616,6 +616,7 @@ typedef cc_uint8  cc_bool;
 		#define DEFAULT_GFX_BACKEND CC_GFX_BACKEND_GL2
 	#else
 		#define DEFAULT_GFX_BACKEND CC_GFX_BACKEND_GL1
+		#define CC_DISABLE_ANIMATIONS
 	#endif
 #endif
 #endif
diff --git a/src/Graphics_GL1.c b/src/Graphics_GL1.c
index 4f027d8e1..88c1fca10 100644
--- a/src/Graphics_GL1.c
+++ b/src/Graphics_GL1.c
@@ -440,7 +440,7 @@ cc_bool Gfx_WarnIfNecessary(void) {
 #if defined CC_BUILD_SYMBIAN
 	if (String_ContainsConst(&renderer, "SGX")) {
 	} else if (String_ContainsConst(&renderer, "MBX")) {
-		Gfx.Limitations |= GFX_LIMIT_VERTEX_ONLY_FOG;
+		Gfx.Limitations |= GFX_LIMIT_MINIMAL;
 		mbx = true;
 	} else if (!String_ContainsConst(&renderer, "HW")) {
 		Chat_AddRaw("&cSoftware rendering is being used, performance will greatly suffer.");