Added 24bit Bitmap example

This example shows how to draw a 24bit bitmap on bottom screen

examples/Graphics/Bitmap/24bit_color/Makefile

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+#---------------------------------------------------------------------------------
+.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=softfp
+
+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
+
+.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)),)
+.PHONY: all
+all	:	$(OUTPUT).3dsx $(OUTPUT).smdh
+endif
+$(OUTPUT).3dsx	:	$(OUTPUT).elf
+$(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
+#---------------------------------------------------------------------------------------

examples/Graphics/Bitmap/24bit_color/README.md

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+24bit Bitmap Example
+=======
+
+This example shows on bottom screen an upscaled version of the nds examples Drunken Coders logo that can be found in devkitPro.
+
+If you want to try with your own image follow these steps:
+
+1. Download & install: http://www.imagemagick.org/ (If you get an option to add the application to the path make sure to check it!).
+2. convert fileIn.png -channel B -separate fileIn.png -channel G -separate fileIn.png -channel R -separate -channel RGB -combine -rotate 90 fileOut.rgb
+3. Rename fileOut.rgb in fileOut.bin
+4. Copy fileOut.bin in the data folder of your project
+5. Replace any reference of drunkenlogo_bin in main.cpp with fileOut_bin (or however you named it)
+6. Re-Build the project
+
+
+As you can see from the previos steps the image is clockwise rotated by 90 degrees and its B and R channels are swapped. The first operation is done because the 3DS screens are actually portrait screens rotated by 90 degrees (in a counter-clockwise direction), while the second one is done because the 3DS screens' framebuffers have a BGR888 color format, by default.

examples/Graphics/Bitmap/24bit_color/source/main.cpp

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+/*
+	Hello World example made by Aurelio Mannara for ctrulib
+	This code was modified for the last time on: 12/13/2014 01:00 UTC+1
+
+	This wouldn't be possible without the amazing work done by:
+	-Smealum
+	-fincs
+	-WinterMute
+	-yellows8
+	-plutoo
+	-mtheall
+	-Many others who worked on 3DS and I'm surely forgetting about
+*/
+
+#include <3ds.h>
+#include <stdio.h>
+#include <string.h>
+
+//This include a header containing definitions of our image
+#include "drunkenlogo_bin.h"
+
+int main(int argc, char **argv)
+{
+	// Initialize services
+	srvInit();
+	aptInit();
+	gfxInit();
+	hidInit(NULL);
+
+	//Initialize console on top screen. Using NULL as the second argument tells the console library to use the internal console structure as current one
+	consoleInit(GFX_TOP, NULL);
+
+	printf("Sorry for the recycled image from the Nintendo DS devkitPro's examples, but it's always good to bring back some memories, isn't it?");
+
+	printf("\x1b[29;15HPress Start to exit.");
+
+	//We don't need double buffering in this example. In this way we can draw our image only once on screen.
+	gfxSetDoubleBuffering(GFX_BOTTOM, false);
+
+	//Get the bottom screen's frame buffer
+	u8* fb = gfxGetFramebuffer(GFX_BOTTOM, GFX_LEFT, NULL, NULL);
+	
+	//Copy our image in the bottom screen's frame buffer
+	memcpy(fb, drunkenlogo_bin, drunkenlogo_bin_size);
+
+	// Main loop
+	while (aptMainLoop())
+	{
+		//Scan all the inputs. This should be done once for each frame
+		hidScanInput();
+
+		//hidKeysDown returns information about which buttons have been just pressed (and they weren't in the previous frame)
+		u32 kDown = hidKeysDown();
+
+		if (kDown & KEY_START) break; // break in order to return to hbmenu
+
+		// Flush and swap framebuffers
+		gfxFlushBuffers();
+		gfxSwapBuffers();
+
+		//Wait for VBlank
+		gspWaitForVBlank();
+	}
+
+	// Exit services
+	gfxExit();
+	hidExit();
+	aptExit();
+	srvExit();
+	return 0;
+}