Mercurial > sdl-ios-xcode
view Makefile.minimal @ 5053:b5b42be9333c
Fixed bug #1026
Vittorio Giovara 2010-07-16 19:09:28 PDT
i was reading SDL_renderer_gles and i noticed that every time we there
is some gl call the gl state is modified with a couple of
glEnableClientState()/glDisableClientState.
While this is completely fine for desktops systems, this is a major
performace kill on mobile devices, right where opengles is
implemented.
Normal practice in this case is to update the glstate once, keep it
always the same and disable/enable other states only in very special
occasions.
On the web there's plenty of documentation (on the top of my head
http://developer.apple.com/iphone/library/documentation/3DDrawing/Conceptual/OpenGLES_ProgrammingGuide/Performance/Performance.html#//apple_ref/doc/uid/TP40008793-CH105-SW5
) and i personally tried this.
I modified my code and got a 10 fps boost, then modified SDL_render_gles and
shifted from 40 fps to 50 fps alone -- considering that i started from ~30fps i
got an 80% performance increase with this technique.
I have attached a dif of my changes, hope that it will be included in
mainstream.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Wed, 19 Jan 2011 23:56:16 -0800 |
parents | b7a48f533966 |
children |
line wrap: on
line source
# Makefile to build the SDL library INCLUDE = -I./include CFLAGS = -g -O2 $(INCLUDE) AR = ar RANLIB = ranlib CONFIG_H = include/SDL_config.h TARGET = libSDL.a SOURCES = \ src/*.c \ src/audio/*.c \ src/cdrom/*.c \ src/cpuinfo/*.c \ src/events/*.c \ src/file/*.c \ src/joystick/*.c \ src/haptic/*.c \ src/stdlib/*.c \ src/thread/*.c \ src/timer/*.c \ src/video/*.c \ src/power/*.c \ src/audio/dummy/*.c \ src/video/dummy/*.c \ src/joystick/dummy/*.c \ src/haptic/dummy/*.c \ src/cdrom/dummy/*.c \ src/thread/generic/*.c \ src/timer/dummy/*.c \ src/loadso/dummy/*.c \ OBJECTS = $(shell echo $(SOURCES) | sed -e 's,\.c,\.o,g') all: $(TARGET) $(TARGET): $(CONFIG_H) $(OBJECTS) $(AR) crv $@ $^ $(RANLIB) $@ $(CONFIG_H): cp $(CONFIG_H).default $(CONFIG_H) clean: rm -f $(TARGET) $(OBJECTS)