Added a new banner and an animated icon

.gitignore

@@ -8,4 +8,5 @@ build
 *.elf
 *.map
 *.bin
+!code/bootstrap/icon.bin
 code/bootstrap/nitrofiles

code/bootstrap/AnimatedBannerPatch.py

@@ -0,0 +1,76 @@
+# import os
+from argparse import ArgumentParser
+from struct import pack, unpack
+
+# Thanks to "lifehackerhansol" and "RocketRobz" for the script
+# https://github.com/DS-Homebrew/TWiLightMenu/blob/master/booter/animatedbannerpatch.py
+
+# GBATEK swiCRC16 pseudocode
+# https://problemkaputt.de/gbatek-bios-misc-functions.htm
+def crc16(data):
+    crc = 0xFFFF
+    for byte in bytearray(data):
+        crc ^= byte
+        for i in range(8):
+            carry = (crc & 0x0001) > 0
+            crc = crc >> 1
+            if carry:
+                crc = crc ^ 0xA001
+    return pack("<H", crc)
+
+
+def patch(path, banner):
+    with open(path, "rb+") as f:
+        # get total TWL ROM size
+        f.seek(0x210, 0)
+        romsize = unpack("<I", f.read(0x4))[0]
+
+        # we're going to make this look nice in a hex editor
+        while (romsize % 16 != 0):
+            romsize += 1
+
+        # new animated banner location
+        f.seek(0x68, 0)
+        f.write(pack("<I", romsize))
+
+        # total ROM size update, both DS and DSi header entry
+        # NTR ROM size is supposed to be NTR data only, meaning TWL ROM size is different.
+        # Ignore it, as new banner is added to EOF, so the whole thing has to be included anyway.
+        f.seek(0x80, 0)
+        f.write(pack("<I", romsize + 0x23c0))
+        f.seek(0x210, 0)
+        f.write(pack("<I", romsize + 0x23c0))
+
+        # total icon size update in TWL header
+        f.seek(0x208, 0)
+        f.write(pack("<I", 0x23c0))
+
+        # actually write the banner now
+        f.seek(romsize, 0)
+        infile = open(banner, "rb")
+        f.write(infile.read())
+        infile.close()
+
+        # update header CRC
+        f.seek(0, 0)
+        crc = crc16(f.read(0x15E))
+        f.seek(0x15E, 0)
+        f.write(crc)
+        f.close()
+    return 0
+
+
+if __name__ == "__main__":
+    description = "Animated banner injector tool\n\
+        This must have a prepared animated banner binary!\n\
+        Only compatible with DSi-mode ROMs."
+    parser = ArgumentParser(description=description)
+    parser.add_argument("input", metavar="input.nds", type=str, nargs=1, help="DS ROM path")
+    parser.add_argument("banner", metavar="banner.bin", type=str, nargs=1, help="Animated banner path")
+    args = parser.parse_args()
+    print(description)
+    path = args.input[0]
+    banner = args.banner[0]
+
+    if (patch(path, banner)) == 0:
+        print("\nSuccess.")

code/bootstrap/Makefile

@@ -5,6 +5,16 @@ ifeq ($(strip $(DEVKITARM)),)
 $(error "Please set DEVKITARM in your environment. export DEVKITARM=<path to>devkitARM")
 endif
 
+ifneq (,$(shell command -v python3 2>/dev/null))
+PYTHON	:= python3
+else ifneq (,$(shell command -v python2 2>/dev/null))
+PYTHON	:= python2
+else ifneq (,$(shell command -v python 2>/dev/null))
+PYTHON	:= python
+else
+$(error "Python not found in PATH, please install it.")
+endif
+
 export TARGET	:=	GBARunner3
 export TOPDIR	:=	$(CURDIR)
 
@@ -16,10 +26,13 @@ else
 NITRO_FILES	:= 
 endif
 
+# GAME_ICON is the image used to create the game icon, leave blank to use default rule
+GAME_ICON := $(CURDIR)/icon.bmp
+
 # These set the information text in the nds file
-GAME_TITLE     := GBARunner 3
+GAME_TITLE     := GBARunner3
 GAME_SUBTITLE1 := By Gericom
-GAME_SUBTITLE2 :=
+GAME_SUBTITLE2 := ""
 
 include $(DEVKITARM)/ds_rules
 
@@ -44,10 +57,17 @@ checkarm9:
 	$(MAKE) -C arm9
 
 #---------------------------------------------------------------------------------
+ANIMATED ?= ON
+
 $(TARGET).nds	: $(NITRO_FILES) ../core/arm7/$(TARGET).elf arm9/$(TARGET).elf
 	ndstool	-c $(TARGET).nds -7 ../core/arm7/$(TARGET).elf -9 arm9/$(TARGET).elf \
 	-b $(GAME_ICON) "$(GAME_TITLE);$(GAME_SUBTITLE1);$(GAME_SUBTITLE2)" \
 	$(_ADDFILES)
+ifeq ($(ANIMATED),ON)
+	$(PYTHON) AnimatedBannerPatch.py $@ icon.bin
+else
+	@echo "Static Icon applied"
+endif
 ifdef GBAR3_ISNITRO
 	dlditool FatInNitroFS.dldi $(TARGET).nds
 endif