Mercurial > sdl-ios-xcode
view Makefile.pandora @ 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 | 11cedc036ca1 |
| children |
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# Makefile to build the pandora SDL library AR = arm-none-linux-gnueabi-ar RANLIB = arm-none-linux-gnueabi-ranlib CC = arm-none-linux-gnueabi-gcc CXX = arm-none-linux-gnueabi-g++ STRIP = arm-none-linux-gnueabi-strip CFLAGS = -O3 -march=armv7-a -mcpu=cortex-a8 -mtune=cortex-a8 -mfloat-abi=softfp \ -mfpu=neon -ftree-vectorize -ffast-math -fomit-frame-pointer -fno-strict-aliasing -fsingle-precision-constant \ -I./include -I$(PNDSDK)/usr/include -DSDL_REVISION=0 TARGET = libSDL.a SOURCES = ./src/*.c ./src/audio/*.c ./src/cpuinfo/*.c ./src/events/*.c \ ./src/file/*.c ./src/stdlib/*.c ./src/thread/*.c ./src/timer/*.c ./src/video/*.c \ ./src/joystick/*.c ./src/haptic/*.c ./src/power/*.c ./src/video/dummy/*.c ./src/audio/disk/*.c \ ./src/audio/dummy/*.c ./src/loadso/dlopen/*.c ./src/audio/dsp/*.c ./src/audio/dma/*.c \ ./src/thread/pthread/SDL_systhread.c ./src/thread/pthread/SDL_syssem.c \ ./src/thread/pthread/SDL_sysmutex.c ./src/thread/pthread/SDL_syscond.c \ ./src/joystick/linux/*.c ./src/haptic/linux/*.c ./src/timer/unix/*.c \ ./src/atomic/linux/*.c \ ./src/video/pandora/SDL_pandora.o ./src/video/pandora/SDL_pandora_events.o ./src/video/x11/*.c OBJECTS = $(shell echo $(SOURCES) | sed -e 's,\.c,\.o,g') CONFIG_H = $(shell cp include/SDL_config_pandora.h include/SDL_config.h && touch include/SDL_revision.h) all: $(TARGET) $(TARGET): $(CONFIG_H) $(OBJECTS) $(AR) crv $@ $^ $(RANLIB) $@ clean: rm -f $(TARGET) $(OBJECTS)