--- a/hedgewars/SDLh.pas	Fri Aug 05 01:22:51 2011 +0200
+++ b/hedgewars/SDLh.pas	Sat Aug 06 07:09:30 2011 +0200
@@ -772,6 +772,7 @@
 function  SDL_GL_CreateContext(window: PSDL_Window): PSDL_GLContext; cdecl; external SDLLibName;
 procedure SDL_GL_DeleteContext(context: PSDL_GLContext); cdecl; external SDLLibName;
 function  SDL_GL_SwapWindow(window: PSDL_Window): LongInt; cdecl; external SDLLibName;
+function  SDL_GL_SetSwapInterval(interval: LongInt): LongInt; cdecl; external SDLLibName;
 
 procedure SDL_VideoQuit; cdecl; external SDLLibName;
 function  SDL_GetNumVideoDisplays: LongInt; cdecl; external SDLLibName;

--- a/hedgewars/hwengine.pas	Fri Aug 05 01:22:51 2011 +0200
+++ b/hedgewars/hwengine.pas	Sat Aug 06 07:09:30 2011 +0200
@@ -104,7 +104,7 @@
         end;
 
 {$IFDEF SDL13}
-    SDL_RenderPresent(SDLrender);
+    SDL_GL_SwapWindow(SDLwindow);
 {$ELSE}
     SDL_GL_SwapBuffers();
 {$ENDIF}
@@ -129,10 +129,9 @@
     CloseIPC();
     TTF_Quit();
 {$IFDEF SDL13}
-    SDL_RenderClear(SDLrender);
-    SDL_DestroyRenderer(SDLrender);
+    SDL_GL_DeleteContext(SDLGLcontext);
     SDL_DestroyWindow(SDLwindow);
-    SDLrender:= nil;
+    SDLGLcontext:= nil;
     SDLwindow:= nil;
 {$ENDIF}
     SDL_Quit();

--- a/hedgewars/uStore.pas	Fri Aug 05 01:22:51 2011 +0200
+++ b/hedgewars/uStore.pas	Sat Aug 06 07:09:30 2011 +0200
@@ -525,17 +525,24 @@
 end;
 
 procedure SetupOpenGL;
-{$IFNDEF IPHONEOS}
-var vendor: shortstring;
+var vendor: shortstring = '';
 {$IFDEF DARWIN}
 const one : LongInt = 1;
 {$ENDIF}
+begin
+{$IFDEF SDL13}
+    // this function creates an opengles1.1 context by default on mobile devices
+    // use SDL_GL_SetAttribute to change this behaviour
+    SDLGLcontext:=SDL_GL_CreateContext(SDLwindow);
+    SDLTry(SDLGLcontext <> nil, true);
+    SDL_GL_SetSwapInterval(1);
 {$ENDIF}
-begin
 
 {$IFDEF IPHONEOS}
     SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 0);
     SDL_GL_SetAttribute(SDL_GL_RETAINED_BACKING, 1);
+    vendor:= vendor; // avoid hint
+    one:= one; // avoid hint
 {$ELSE}
     SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
     vendor:= LowerCase(shortstring(pchar(glGetString(GL_VENDOR))));
@@ -709,7 +716,7 @@
     DrawFromRect( -squaresize div 2, (cScreenHeight - squaresize) shr 1, @r, ProgrTex);
 
 {$IFDEF SDL13}
-    SDL_RenderPresent(SDLrender);
+    SDL_GL_SwapWindow(SDLwindow);
 {$ELSE}
     SDL_GL_SwapBuffers();
 {$ENDIF}
@@ -957,24 +964,11 @@
     x:= x or (SDL_GetNumVideoDisplays() - 1);
     y:= y or (SDL_GetNumVideoDisplays() - 1);
 
-    // hardcode the opengles driver as we do our own drawing
-    SDL_SetHint('SDL_RENDER_DRIVER','opengles');
-    flags:= flags or SDL_WINDOW_BORDERLESS;  // do not set SDL_WINDOW_RESIZABLE on iOS
+    flags:= flags or SDL_WINDOW_BORDERLESS or SDL_WINDOW_RESIZABLE;
 {$ENDIF}
 
     SDLwindow:= SDL_CreateWindow('Hedgewars', x, y, cScreenWidth, cScreenHeight, flags);
     SDLTry(SDLwindow <> nil, true);
-    SDLrender:= SDL_CreateRenderer(SDLwindow, -1, SDL_RENDERER_ACCELERATED or SDL_RENDERER_PRESENTVSYNC);
-    SDLTry(SDLrender <> nil, true);
-
-    // clean the renderer before using it
-    SDL_SetRenderDrawColor(SDLrender, 0, 0, 0, 255);
-    SDL_RenderClear(SDLrender);
-    SDL_RenderPresent(SDLrender);
-
-    // reset the gl context from the one created by SDL (as we have our own drawing system)
-    glMatrixMode(GL_PROJECTION);
-    glLoadIdentity();
 {$ELSE}
     if not cOnlyStats then
         begin

--- a/hedgewars/uVariables.pas	Fri Aug 05 01:22:51 2011 +0200
+++ b/hedgewars/uVariables.pas	Sat Aug 06 07:09:30 2011 +0200
@@ -167,7 +167,7 @@
 
 {$IFDEF SDL13}
     SDLwindow       : PSDL_Window;
-    SDLrender       : PSDL_Renderer;
+    SDLGLcontext    : PSDL_GLContext;
 {$ENDIF}
 
     WorldDx: LongInt;
@@ -2492,7 +2492,7 @@
 
 {$IFDEF SDL13}
     SDLwindow       := nil;
-    SDLrender       := nil;
+    SDLGLcontext    := nil;
 {$ENDIF}
 
     // those values still are not perfect