Rough first pass on python sprite compiler

.gitignore

@@ -1,2 +1,3 @@
 HGR.xcodeproj/xcuserdata
 hgrtest.lst
+HGR.xcodeproj/project.xcworkspace/xcuserdata/qd.xcuserdatad/UserInterfaceState.xcuserstate

HiSprite.py

@@ -0,0 +1,122 @@
+#!/usr/bin/python
+
+import sys,os,png
+
+class Colors:
+	black,magenta = range(2)
+	
+	
+def main(argv):
+	
+	if len(argv)<1:
+		usage()
+
+	pngfile = sys.argv[1]
+
+	reader = png.Reader(pngfile)
+	try:
+		pngdata = reader.asRGB8()
+	except:
+		usage()
+
+	width = pngdata[0];
+	height = pngdata[1];
+	pixeldata = pngdata[2];
+	
+	bitmap = [[0 for x in range(width)] for y in range(height)] 		
+	
+	for shift in range(7):
+		for phase in range(2):
+			if shift==0 and phase>0:
+				continue
+				
+			for row in range(height):
+				for col in range(width):
+					(pixelr,pixelg,pixelb,half) = pixelRemap(pixeldata,row,col,width,shift,phase)
+			
+					if pixelr==255 and pixelg==0 and pixelb==255:
+						bitmap[row][col] = Colors.magenta
+					else:
+						bitmap[row][col] = Colors.black
+			
+			spriteNum = max(0,shift*2-1+phase)
+			printBitmap(bitmap,os.path.splitext(pngfile)[0].upper(),spriteNum,half,0)						
+
+	
+
+def pixelRemap(pixeldata,row,col,width,shift,phase):
+	halfPixel = 0
+	overHalf = 0
+	
+	if shift>=width:
+		overHalf = 1
+		shift = shift-width+1
+		if phase==0:
+			halfPixel = 1
+		
+	if phase==0:
+		col = col+shift
+	else:
+		col = col-(width-shift)
+		if not overHalf:
+			halfPixel = -1
+
+					
+	if col >= width or col<0:
+		return (0,0,0,halfPixel)
+		
+	r = pixeldata[row][col*3]
+	g = pixeldata[row][col*3+1]
+	b = pixeldata[row][col*3+2]
+			
+	return (r,g,b,halfPixel)
+	
+			
+def colorString(color,currByteString):
+	if len(currByteString) > 6:
+		if color==Colors.magenta:
+			return '1'
+		else:
+			return '0'
+	else:	
+		if color==Colors.magenta:
+			return '10'
+	
+	return '00'
+	
+		
+def printBitmap(bitmap,label,shift,halfShift,highbit):
+	print "%s%d:" % (label,shift)
+	for row in range(len(bitmap)):
+		byteString = "%d" % highbit
+		 
+		for col in range(len(bitmap[0])):
+			append = colorString(bitmap[row][col],byteString)
+			byteString += append
+		
+		if halfShift>0:
+			byteString = "0" + byteString[:-1]
+		else:
+			if halfShift<0:
+				byteString = byteString[1:] + "0"
+			
+		sys.stdout.write("\t.byte\t%%%s\n" % byteString);
+
+	sys.stdout.write('\n\n')			
+	sys.stdout.flush()
+			
+		
+			
+def usage():
+	print '''
+Usage: HiSprite <png file>
+
+PNG file must not have an alpha channel!
+'''
+	sys.exit(2)
+
+
+
+
+if __name__ == "__main__":
+	main(sys.argv[1:])

spritedata.s

@@ -35,6 +35,7 @@ SPRITE2:
 	.byte	%00000010
 	.byte	%00000010
 
+
 SPRITE3:
 	.byte	%01010000		; Two pixel shift
 	.byte	%00010000		; (reversed)
@@ -55,6 +56,7 @@ SPRITE4:
 	.byte	%00001000
 	.byte	%00001010
 
+
 SPRITE5:
 	.byte	%01000000		; Three pixel shift
 	.byte	%01000000		; (reversed)
@@ -75,6 +77,7 @@ SPRITE6:
 	.byte	%00100000
 	.byte	%00101010
 
+
 SPRITE7:
 	.byte	%00101010		; Four pixel shift
 	.byte	%00000010		; (reversed)
@@ -95,6 +98,7 @@ SPRITE8:
 	.byte	%00000001
 	.byte	%00000001
 
+
 SPRITE9:
 	.byte	%00101000		; Five pixel shift
 	.byte	%00001000		; (reversed)
@@ -115,6 +119,7 @@ SPRITE10:
 	.byte	%00000100
 	.byte	%00000101
 
+
 SPRITE11:
 	.byte	%00100000		; Six pixel shift
 	.byte	%00100000		; (2nd byte, reversed)
@@ -135,6 +140,7 @@ SPRITE12:
 	.byte	%00010000
 	.byte	%00010101
 
+
 BLACK:
 	.byte	%00000000
 	.byte	%00000000