721 procedure SetupOpenGLAttributes;

   721 procedure SetupOpenGLAttributes;

   722 begin

   722 begin

   723 {$IFDEF IPHONEOS}

   723 {$IFDEF IPHONEOS}

   724     SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 0);

   724     SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 0);

   725     SDL_GL_SetAttribute(SDL_GL_RETAINED_BACKING, 1);

   725     SDL_GL_SetAttribute(SDL_GL_RETAINED_BACKING, 1);

   726 {$ELSE}

   729 {$ELSE}

   727     SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);

   730     SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);

   728 {$ENDIF}

   731 {$ENDIF}

   729 {$IFNDEF SDL2} // vsync is default in SDL2

   732 {$IFNDEF SDL2} // vsync is default in SDL2

   730     SDL_GL_SetAttribute(SDL_GL_SWAP_CONTROL, LongInt((cReducedQuality and rqDesyncVBlank) = 0));

   733     SDL_GL_SetAttribute(SDL_GL_SWAP_CONTROL, LongInt((cReducedQuality and rqDesyncVBlank) = 0));