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view test/nds-test-progs/general/Makefile @ 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 | 204be4fc2726 |
children |
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#--------------------------------------------------------------------------------- .SUFFIXES: #--------------------------------------------------------------------------------- ifeq ($(strip $(DEVKITARM)),) $(error "Please set DEVKITARM in your environment. export DEVKITARM=<path to>devkitARM") endif include $(DEVKITARM)/ds_rules #--------------------------------------------------------------------------------- # TARGET is the name of the output # BUILD is the directory where object files & intermediate files will be placed # SOURCES is a list of directories containing source code # INCLUDES is a list of directories containing extra header files #--------------------------------------------------------------------------------- TARGET := $(shell basename $(CURDIR)) BUILD := build SOURCES := source DATA := data INCLUDES := include #--------------------------------------------------------------------------------- # options for code generation #--------------------------------------------------------------------------------- ARCH := -mthumb -mthumb-interwork # note: arm9tdmi isn't the correct CPU arch, but anything newer and LD # *insists* it has a FPU or VFP, and it won't take no for an answer! CFLAGS := -save-temps -g -Wall -O0\ -mcpu=arm9tdmi -mtune=arm9tdmi \ $(ARCH) CFLAGS += $(INCLUDE) -DARM9 -D__NDS__ CXXFLAGS := $(CFLAGS) -fno-rtti -fno-exceptions -fno-exceptions -fno-rtti ASFLAGS := -g $(ARCH) LDFLAGS = -specs=ds_arm9.specs -g $(ARCH) -mno-fpu -Wl,-Map,$(notdir $*.map) #--------------------------------------------------------------------------------- # any extra libraries we wish to link with the project #--------------------------------------------------------------------------------- LIBS := -lSDL -lfat -lnds9 #--------------------------------------------------------------------------------- # list of directories containing libraries, this must be the top level containing # include and lib #--------------------------------------------------------------------------------- LIBDIRS := $(LIBNDS) #--------------------------------------------------------------------------------- # no real need to edit anything past this point unless you need to add additional # rules for different file extensions #--------------------------------------------------------------------------------- ifneq ($(BUILD),$(notdir $(CURDIR))) #--------------------------------------------------------------------------------- export OUTPUT := $(CURDIR)/$(TARGET) export VPATH := $(foreach dir,$(SOURCES),$(CURDIR)/$(dir)) \ $(foreach dir,$(DATA),$(CURDIR)/$(dir)) export DEPSDIR := $(CURDIR)/$(BUILD) CFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.c))) CPPFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.cpp))) SFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.s))) BINFILES := $(foreach dir,$(DATA),$(notdir $(wildcard $(dir)/*.*))) #--------------------------------------------------------------------------------- # use CXX for linking C++ projects, CC for standard C #--------------------------------------------------------------------------------- ifeq ($(strip $(CPPFILES)),) #--------------------------------------------------------------------------------- export LD := $(CC) #--------------------------------------------------------------------------------- else #--------------------------------------------------------------------------------- export LD := $(CXX) #--------------------------------------------------------------------------------- endif #--------------------------------------------------------------------------------- export OFILES := $(addsuffix .o,$(BINFILES)) \ $(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(SFILES:.s=.o) export INCLUDE := $(foreach dir,$(INCLUDES),-I$(CURDIR)/$(dir)) \ $(foreach dir,$(LIBDIRS),-I$(dir)/include) \ $(foreach dir,$(LIBDIRS),-I$(dir)/include) \ -I$(CURDIR)/$(BUILD) export LIBPATHS := $(foreach dir,$(LIBDIRS),-L$(dir)/lib) .PHONY: $(BUILD) clean #--------------------------------------------------------------------------------- $(BUILD): @[ -d $@ ] || mkdir -p $@ @make --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile #--------------------------------------------------------------------------------- clean: @echo clean ... @rm -fr $(BUILD) $(TARGET).elf $(TARGET).nds $(TARGET).arm9 $(TARGET).ds.gba #--------------------------------------------------------------------------------- else DEPENDS := $(OFILES:.o=.d) #--------------------------------------------------------------------------------- # main targets #--------------------------------------------------------------------------------- $(OUTPUT).ds.gba : $(OUTPUT).nds $(OUTPUT).nds : $(OUTPUT).arm9 $(OUTPUT).arm9 : $(OUTPUT).elf $(OUTPUT).elf : $(OFILES) #--------------------------------------------------------------------------------- %.pcx.o : %.pcx #--------------------------------------------------------------------------------- @echo $(notdir $<) @$(bin2o) -include $(DEPENDS) #--------------------------------------------------------------------------------------- endif #---------------------------------------------------------------------------------------