Add gcipack

Author: PistonMiner

ttyd-tools/gcipack/gcipack.py

@@ -0,0 +1,62 @@
+import sys
+import os
+import struct
+import ctypes
+import math
+
+inputFilename = sys.argv[1]
+inputFile = open(inputFilename, "rb")
+inputBuffer = ctypes.create_string_buffer(inputFile.read())[:-1]
+inputFile.close()
+
+blockCount = math.ceil((0x2040 + len(inputBuffer)) / 0x2000)
+
+# Create header
+headerBuffer = ctypes.create_string_buffer(0x40)
+struct.pack_into(">L",  headerBuffer,  0x00, 0x47384D45)	# game code
+struct.pack_into(">H",  headerBuffer,  0x04, 0x3031)		# maker code
+struct.pack_into(">B",  headerBuffer,  0x06, 0xFF)			# unused
+struct.pack_into(">B",  headerBuffer,  0x07, 2)				# banner flags (RGB5A3)
+struct.pack_into("32s", headerBuffer,  0x08, sys.argv[2].encode())	# filename
+struct.pack_into(">L",  headerBuffer,  0x28, 0)				# modified time
+struct.pack_into(">L",  headerBuffer,  0x2C, 0)				# image offset
+struct.pack_into(">H",  headerBuffer,  0x30, 2)				# icon format
+struct.pack_into(">H",  headerBuffer,  0x32, 3)				# animation speed (1 icon for 12 frames)
+struct.pack_into(">B",  headerBuffer,  0x34, 4)				# permissions
+struct.pack_into(">B",  headerBuffer,  0x35, 0)				# copy counter
+struct.pack_into(">H",  headerBuffer,  0x36, 0)				# first block number
+struct.pack_into(">H",  headerBuffer,  0x38, blockCount)	# block count
+struct.pack_into(">H",  headerBuffer,  0x3A, 0xFF)			# unused
+struct.pack_into(">L",  headerBuffer,  0x3C, 0x2000)		# comment address
+
+# Load banner and icon
+bannerFile = open(sys.argv[5], "rb")
+bannerBuffer = ctypes.create_string_buffer(bannerFile.read())[:-1]
+if len(bannerBuffer) != 0x1800:
+	print("Warning: banner size mismatch (should be 96x32 RGB5A3)")
+bannerFile.close()
+
+iconFile = open(sys.argv[6], "rb")
+iconBuffer = ctypes.create_string_buffer(iconFile.read())[:-1]
+if len(iconBuffer) != 0x800:
+	print("Warning: icon size mismatch %d (should be 32x32 RGB5A3)" % len(iconBuffer))
+iconFile.close()
+
+# Comment
+commentBuffer = ctypes.create_string_buffer(0x40)
+struct.pack_into("32s", commentBuffer, 0x00, sys.argv[3].encode())
+struct.pack_into("32s", commentBuffer, 0x20, sys.argv[4].encode())
+
+# Pad to block boundary
+paddingLength = blockCount * 0x2000 - (len(bannerBuffer) + len(iconBuffer) + len(commentBuffer) + len(inputBuffer))
+paddingBuffer = ctypes.create_string_buffer(paddingLength)
+
+outputFilename = os.path.splitext(os.path.splitext(inputFilename)[0])[0] + ".gci"
+outputFile = open(outputFilename, "wb")
+outputFile.write(bytearray(headerBuffer))
+outputFile.write(bytearray(bannerBuffer))
+outputFile.write(bytearray(iconBuffer))
+outputFile.write(bytearray(commentBuffer))
+outputFile.write(bytearray(inputBuffer))
+outputFile.write(bytearray(paddingBuffer))
+outputFile.close()