3DS port of charsnow.c from flarn2006/MiscPrograms repo

charsnow_3ds.c

#include <3ds.h>
#include <stdio.h>
#include <stdlib.h>

#define CON_WIDTH 40
#define CON_HEIGHT 60

PrintConsole con_top, con_bottom;
int heightmap[CON_WIDTH];

void refresh()
{
	gfxFlushBuffers();
	gfxSwapBuffers();
	gspWaitForVBlank();
}

void setchar(int x, int y, int ch, int fg)
{
	PrintConsole *con;
	if (y >= 30) {
		y -= 30;
		con = &con_bottom;
	} else {
		x += 5;
		con = &con_top;
	}
	
	consoleSelect(con);
	con->cursorX = x;
	con->cursorY = y;
	con->fg = fg;
	putchar(ch);
}

void fillrgn(int left, int top, int right, int bottom, int ch, int fg)
{
	int y; for (y=top; y<=bottom; y++) {
		int x; for (x=left; x<=right; x++) {
			setchar(x, y, ch, fg);
		}
	}
}

void dropchar(int x, int ch, int fg)
{
	if (heightmap[x] > 0) {
		int y; for (y=0; y<heightmap[x]; y++) {
			if (y > 0) setchar(x, y-1, ' ', fg);
			setchar(x, y, ch, fg);
			refresh();
		}
		heightmap[x]--;
	}
}

int randchar()
{
	int ch = rand() % 255;
	if (ch >= 10) ch++;
	return ch;
}

int main(int argc, char *argv[])
{
	int i; for (i=0; i<CON_WIDTH; i++) {
		heightmap[i] = CON_HEIGHT;
	}
	
	srand(osGetTime());
	
	gfxInitDefault();
	consoleInit(GFX_TOP, &con_top);
	consoleInit(GFX_BOTTOM, &con_bottom);
	
	fillrgn(-5, 0, -2, 29, 177, 8);
	fillrgn(-1, 0, -1, 29, 186, 8);
	fillrgn(40, 0, 40, 29, 186, 8);
	fillrgn(41, 0, 44, 29, 177, 8);
	refresh();
	
	while (aptMainLoop()) {
		hidScanInput();
		if (hidKeysDown() & KEY_START) {
			break;
		}
		
		dropchar(rand() % CON_WIDTH, randchar(), rand() % 15 + 1);
	}
	
	gfxExit();
	
	return 0;
}

Makefile

#---------------------------------------------------------------------------------
.SUFFIXES:
#---------------------------------------------------------------------------------

ifeq ($(strip $(DEVKITARM)),)
$(error "Please set DEVKITARM in your environment. export DEVKITARM=<path to>devkitARM")
endif

TOPDIR ?= $(CURDIR)
include $(DEVKITARM)/3ds_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
# DATA is a list of directories containing data files
# INCLUDES is a list of directories containing header files
#
# NO_SMDH: if set to anything, no SMDH file is generated.
# APP_TITLE is the name of the app stored in the SMDH file (Optional)
# APP_DESCRIPTION is the description of the app stored in the SMDH file (Optional)
# APP_AUTHOR is the author of the app stored in the SMDH file (Optional)
# ICON is the filename of the icon (.png), relative to the project folder.
#   If not set, it attempts to use one of the following (in this order):
#     - <Project name>.png
#     - icon.png
#     - <libctru folder>/default_icon.png
#---------------------------------------------------------------------------------
TARGET		:=	$(notdir $(CURDIR))
BUILD		:=	build
SOURCES		:=	source
DATA		:=	data
INCLUDES	:=	include

#---------------------------------------------------------------------------------
# options for code generation
#---------------------------------------------------------------------------------
ARCH	:=	-march=armv6k -mtune=mpcore -mfloat-abi=hard

CFLAGS	:=	-g -Wall -O2 -mword-relocations \
			-fomit-frame-pointer -ffast-math \
			$(ARCH)

CFLAGS	+=	$(INCLUDE) -DARM11 -D_3DS

CXXFLAGS	:= $(CFLAGS) -fno-rtti -fno-exceptions -std=gnu++11

ASFLAGS	:=	-g $(ARCH)
LDFLAGS	=	-specs=3dsx.specs -g $(ARCH) -Wl,-Map,$(notdir $*.map)

LIBS	:= -lctru -lm

#---------------------------------------------------------------------------------
# list of directories containing libraries, this must be the top level containing
# include and lib
#---------------------------------------------------------------------------------
LIBDIRS	:= $(CTRULIB)


#---------------------------------------------------------------------------------
# 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 TOPDIR	:=	$(CURDIR)

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$(dir)/include) \
			-I$(CURDIR)/$(BUILD)

export LIBPATHS	:=	$(foreach dir,$(LIBDIRS),-L$(dir)/lib)

ifeq ($(strip $(ICON)),)
	icons := $(wildcard *.png)
	ifneq (,$(findstring $(TARGET).png,$(icons)))
		export APP_ICON := $(TOPDIR)/$(TARGET).png
	else
		ifneq (,$(findstring icon.png,$(icons)))
			export APP_ICON := $(TOPDIR)/icon.png
		endif
	endif
else
	export APP_ICON := $(TOPDIR)/$(ICON)
endif

ifeq ($(strip $(NO_SMDH)),)
	export _3DSXFLAGS += --smdh=$(CURDIR)/$(TARGET).smdh
endif

.PHONY: $(BUILD) clean all

#---------------------------------------------------------------------------------
all: $(BUILD)

$(BUILD):
	@[ -d $@ ] || mkdir -p $@
	@$(MAKE) --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile

#---------------------------------------------------------------------------------
clean:
	@echo clean ...
	@rm -fr $(BUILD) $(TARGET).3dsx $(OUTPUT).smdh $(TARGET).elf


#---------------------------------------------------------------------------------
else

DEPENDS	:=	$(OFILES:.o=.d)

#---------------------------------------------------------------------------------
# main targets
#---------------------------------------------------------------------------------
ifeq ($(strip $(NO_SMDH)),)
$(OUTPUT).3dsx	:	$(OUTPUT).elf $(OUTPUT).smdh
else
$(OUTPUT).3dsx	:	$(OUTPUT).elf
endif

$(OUTPUT).elf	:	$(OFILES)

#---------------------------------------------------------------------------------
# you need a rule like this for each extension you use as binary data
#---------------------------------------------------------------------------------
%.bin.o	:	%.bin
#---------------------------------------------------------------------------------
	@echo $(notdir $<)
	@$(bin2o)

# WARNING: This is not the right way to do this! TODO: Do it right!
#---------------------------------------------------------------------------------
%.vsh.o	:	%.vsh
#---------------------------------------------------------------------------------
	@echo $(notdir $<)
	@python $(AEMSTRO)/aemstro_as.py $< ../$(notdir $<).shbin
	@bin2s ../$(notdir $<).shbin | $(PREFIX)as -o $@
	@echo "extern const u8" `(echo $(notdir $<).shbin | sed -e 's/^\([0-9]\)/_\1/' | tr . _)`"_end[];" > `(echo $(notdir $<).shbin | tr . _)`.h
	@echo "extern const u8" `(echo $(notdir $<).shbin | sed -e 's/^\([0-9]\)/_\1/' | tr . _)`"[];" >> `(echo $(notdir $<).shbin | tr . _)`.h
	@echo "extern const u32" `(echo $(notdir $<).shbin | sed -e 's/^\([0-9]\)/_\1/' | tr . _)`_size";" >> `(echo $(notdir $<).shbin | tr . _)`.h
	@rm ../$(notdir $<).shbin

-include $(DEPENDS)

#---------------------------------------------------------------------------------------
endif
#---------------------------------------------------------------------------------------