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https://github.com/robmcmullen/asmgen.git
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Initial working object-based generator
This commit is contained in:
Rob McMullen
parent
8a1de40e0e
commit
d02300573d
245
HiSprite.py
245
HiSprite.py
@ -1,116 +1,171 @@
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#!/usr/bin/python
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import sys,os,png
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# system packages
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import sys
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import os
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import argparse
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import re
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# external packages
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import png # package name is "pypng" on pypi.python.org
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class Colors:
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black,magenta,green,orange,blue,white,key = range(7)
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def slugify(s):
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"""Simplifies ugly strings into something that can be used as an assembler
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label.
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def main(argv):
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parser = argparse.ArgumentParser(description="Sprite compiler for 65C02/6502 to generate assembly code to render all shifts of the given sprite, optionally with exclusive-or drawing (if background will be non-black). Generated code has conditional compilation directives for the CC65 assembler to allow the same file to be compiled for either architecture.")
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parser.add_argument("-v", "--verbose", default=0, action="count")
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parser.add_argument("-t", "--tables", action="store_true", default=False, help="output only lookup tables for horizontal sprite shifts (division and modulus 7)")
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parser.add_argument("-x", "--xdraw", action="store_true", default=False, help="use XOR for sprite drawing")
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parser.add_argument("files", metavar="IMAGE", nargs="+", help="a PNG image [or a list of them]. PNG files must not have an alpha channel!")
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options, extra_args = parser.parse_known_args()
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>>> print slugify("[Some] _ Article's Title--")
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SOME_ARTICLES_TITLE
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if options.tables:
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printHorizontalLookup()
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exit(0)
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From https://gist.github.com/dolph/3622892#file-slugify-py
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"""
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for pngfile in options.files:
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process(pngfile, options.xdraw)
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# "[Some] _ Article's Title--"
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# "[SOME] _ ARTICLE'S TITLE--"
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s = s.upper()
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# "[SOME] _ ARTICLE'S_TITLE--"
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# "[SOME]___ARTICLE'S_TITLE__"
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for c in [' ', '-', '.', '/']:
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s = s.replace(c, '_')
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# "[SOME]___ARTICLE'S_TITLE__"
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# "SOME___ARTICLES_TITLE__"
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s = re.sub('\W', '', s)
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# "SOME___ARTICLES_TITLE__"
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# "SOME ARTICLES TITLE "
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s = s.replace('_', ' ')
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# "SOME ARTICLES TITLE "
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# "SOME ARTICLES TITLE "
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s = re.sub('\s+', ' ', s)
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# "SOME ARTICLES TITLE "
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# "SOME ARTICLES TITLE"
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s = s.strip()
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# "SOME ARTICLES TITLE"
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# "SOME_ARTICLES_TITLE"
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s = s.replace(' ', '_')
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return s
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def process(pngfile, xdraw=False):
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class Listing(object):
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disclaimer = '''
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; This file was generated by HiSprite.py, a sprite compiler by Quinn Dunki.
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; If you feel the need to modify this file, you are probably doing it wrong.
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'''
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def __init__(self):
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self.lines = [self.disclaimer]
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def __str__(self):
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return "\n".join(self.lines) + "\n"
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def out(self, line):
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self.lines.append(line)
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class Sprite(Listing):
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def __init__(self, pngfile, xdraw=False):
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Listing.__init__(self)
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reader = png.Reader(pngfile)
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try:
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pngdata = reader.asRGB8()
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except:
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usage()
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raise RuntimeError
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width = pngdata[0]
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height = pngdata[1]
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pixelData = list(pngdata[2])
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byteWidth = width/2+1+1 # TODO: Calculate a power of two for this
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niceName = os.path.splitext(pngfile)[0].upper()
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self.xdraw = xdraw
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self.niceName = slugify(os.path.splitext(pngfile)[0])
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self.width = pngdata[0]
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self.height = pngdata[1]
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self.pixelData = list(pngdata[2])
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self.calcStorage()
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self.jumpTable()
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for i in range(self.numShifts):
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self.blitShift(i)
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disclaimer()
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def calcStorage(self):
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self.byteWidth = self.width/2+1+1 # TODO: Calculate a power of two for this
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self.numShifts = 7
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def jumpTable(self):
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# Prologue
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print "%s: ;%d bytes per row" % (niceName,byteWidth)
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print "\tSAVE_AXY"
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print "\tldy PARAM0"
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print "\tldx MOD7_2,y"
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print ".ifpC02"
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print "\tjmp (%s_JMP,x)\n" % (niceName)
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self.out("%s: ;%d bytes per row" % (self.niceName, self.byteWidth))
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self.out("\tSAVE_AXY")
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self.out("\tldy PARAM0")
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self.out("\tldx MOD7_2,y")
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self.out(".ifpC02")
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self.out("\tjmp (%s_JMP,x)\n" % (self.niceName))
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offset_suffix = ""
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# Bit-shift jump table for 65C02
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print "%s_JMP:" % (niceName)
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for shift in range(0,7):
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print "\t.addr %s_SHIFT%d" % (niceName,shift)
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self.out("%s_JMP:" % (self.niceName) )
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for shift in range(self.numShifts):
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self.out("\t.addr %s_SHIFT%d" % (self.niceName, shift))
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print ".else"
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self.out(".else")
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# Fast jump table routine; faster and smaller than self-modifying code
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print "\tlda %s_JMP+1,x" % (niceName)
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print "\tpha"
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print "\tlda %s_JMP,x" % (niceName)
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print "\tpha"
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print "\trts\n"
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self.out("\tlda %s_JMP+1,x" % (self.niceName))
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self.out("\tpha")
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self.out("\tlda %s_JMP,x" % (self.niceName))
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self.out("\tpha")
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self.out("\trts\n")
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# Bit-shift jump table for generic 6502
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print "%s_JMP:" % (niceName)
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for shift in range(0,7):
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print "\t.addr %s_SHIFT%d-1" % (niceName,shift)
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print ".endif"
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self.out("%s_JMP:" % (self.niceName))
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for shift in range(self.numShifts):
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self.out("\t.addr %s_SHIFT%d-1" % (self.niceName,shift))
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self.out(".endif")
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def blitShift(self, shift):
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# Blitting functions
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print "\n"
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for shift in range(0,7):
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self.out("\n")
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# Track cycle count of the blitter. We start with fixed overhead:
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# SAVE_AXY + RESTORE_AXY + rts + sprite jump table
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cycleCount = 9 + 12 + 6 + 3 + 4 + 6
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print "%s_SHIFT%d:" % (niceName,shift)
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print "\tldx PARAM1"
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self.out("%s_SHIFT%d:" % (self.niceName,shift))
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self.out("\tldx PARAM1")
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cycleCount += 3
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rowStartCode,extraCycles = rowStartCalculatorCode();
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print rowStartCode
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rowStartCode,extraCycles = self.rowStartCalculatorCode();
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self.out(rowStartCode)
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cycleCount += extraCycles
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spriteChunks = layoutSpriteChunk(pixelData,width,height,shift,xdraw,cycleCount)
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spriteChunks = self.layoutSpriteChunk(shift, cycleCount)
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for row in range(height):
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for row in range(self.height):
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for chunkIndex in range(len(spriteChunks)):
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print spriteChunks[chunkIndex][row]
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self.out(spriteChunks[chunkIndex][row])
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print "\n"
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def layoutSpriteChunk(self, shift, cycleCount):
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def layoutSpriteChunk(pixelData,width,height,shift,xdraw,cycleCount):
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colorStreams = byteStreamsFromPixels(pixelData,width,height,shift,bitsForColor,highBitForColor)
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maskStreams = byteStreamsFromPixels(pixelData,width,height,shift,bitsForMask,highBitForMask)
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code = generateBlitter(colorStreams,maskStreams,height,xdraw,cycleCount)
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colorStreams = self.byteStreamsFromPixels(shift, bitsForColor, highBitForColor)
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# print colorStreams
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maskStreams = self.byteStreamsFromPixels(shift, bitsForMask, highBitForMask)
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# print maskStreams
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code = self.generateBlitter(colorStreams, maskStreams, cycleCount)
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return code
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def byteStreamsFromPixels(self, shift, bitDelegate, highBitDelegate):
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byteStreams = ["" for x in range(self.height)]
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byteWidth = self.width/2+1+1
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def byteStreamsFromPixels(pixelData,width,height,shift,bitDelegate,highBitDelegate):
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byteStreams = ["" for x in range(height)]
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byteWidth = width/2+1+1
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for row in range(height):
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for row in range(self.height):
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bitStream = ""
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# Compute raw bitstream for row from PNG pixels
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for pixelIndex in range(width):
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pixel = pixelColor(pixelData,row,pixelIndex)
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for pixelIndex in range(self.width):
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pixel = pixelColor(self.pixelData,row,pixelIndex)
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bitStream += bitDelegate(pixel)
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# Shift bit stream as needed
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@ -138,7 +193,7 @@ def byteStreamsFromPixels(pixelData,width,height,shift,bitDelegate,highBitDelega
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bitChunk = bitChunk[::-1]
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# Determine palette bit from first pixel on each row
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highBit = highBitDelegate(pixelData[row][0])
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highBit = highBitDelegate(self.pixelData[row][0])
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byteSplits[byteIndex] = highBit + bitChunk
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bitPos += 7
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@ -147,16 +202,14 @@ def byteStreamsFromPixels(pixelData,width,height,shift,bitDelegate,highBitDelega
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return byteStreams
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def generateBlitter(colorStreams,maskStreams,height,xdraw,baseCycleCount):
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def generateBlitter(self, colorStreams, maskStreams, baseCycleCount):
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byteWidth = len(colorStreams[0])
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spriteChunks = [["" for y in range(height)] for x in range(byteWidth)]
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spriteChunks = [["" for y in range(self.height)] for x in range(byteWidth)]
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cycleCount = baseCycleCount
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optimizationCount = 0
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for row in range(height):
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for row in range(self.height):
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byteSplits = colorStreams[row]
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@ -168,7 +221,7 @@ def generateBlitter(colorStreams,maskStreams,height,xdraw,baseCycleCount):
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byteSplits[chunkIndex] != "10000000":
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# Store byte into video memory
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if xdraw:
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if self.xdraw:
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spriteChunks[chunkIndex][row] = \
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"\tlda (SCRATCH0),y\n" + \
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"\teor #%%%s\n" % byteSplits[chunkIndex] + \
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@ -190,8 +243,8 @@ def generateBlitter(colorStreams,maskStreams,height,xdraw,baseCycleCount):
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cycleCount += 2
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# Finish the row
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if row<height-1:
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rowStartCode,extraCycles = rowStartCalculatorCode()
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if row<self.height-1:
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rowStartCode, extraCycles = self.rowStartCalculatorCode()
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spriteChunks[chunkIndex][row] += "\tinx\n" + rowStartCode;
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cycleCount += 2 + extraCycles
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else:
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@ -200,8 +253,7 @@ def generateBlitter(colorStreams,maskStreams,height,xdraw,baseCycleCount):
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return spriteChunks
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def rowStartCalculatorCode():
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def rowStartCalculatorCode(self):
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return \
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"\tlda HGRROWS_H1,x\n" + \
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"\tsta SCRATCH1\n" + \
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@ -235,7 +287,6 @@ def shiftStringRight(string,shift):
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def bitsForColor(pixel):
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if pixel == Colors.black:
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return "00"
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else:
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@ -250,7 +301,6 @@ def bitsForColor(pixel):
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def bitsForMask(pixel):
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if pixel == Colors.black:
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return "00"
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@ -258,7 +308,6 @@ def bitsForMask(pixel):
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def highBitForColor(pixel):
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# Note that we prefer high-bit white because blue fringe is less noticeable than magenta.
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highBit = "0"
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if pixel == Colors.orange or pixel == Colors.blue or pixel == Colors.white:
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@ -268,7 +317,6 @@ def highBitForColor(pixel):
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def highBitForMask(pixel):
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return "1"
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@ -298,26 +346,35 @@ def pixelColor(pixelData,row,col):
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return color
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def printHorizontalLookup():
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disclaimer()
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class HorizontalLookup(Listing):
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def __init__(self):
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Listing.__init__(self)
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self.generate_tables()
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print "DIV7_2:"
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def generate_tables(self):
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self.out("DIV7_2:")
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for pixel in range(140):
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print "\t.byte $%02x" % ((pixel / 7)*2)
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self.out("\t.byte $%02x" % ((pixel / 7)*2))
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print "\n\nMOD7_2:"
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self.out("\n\nMOD7_2:")
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for pixel in range(140):
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print "\t.byte $%02x" % ((pixel % 7)*2)
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def disclaimer():
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print '''
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; This file was generated by HiSprite.py, a sprite compiler by Quinn Dunki.
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; If you feel the need to modify this file, you are probably doing it wrong.
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'''
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return
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self.out("\t.byte $%02x" % ((pixel % 7)*2))
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if __name__ == "__main__":
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main(sys.argv[1:])
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parser = argparse.ArgumentParser(description="Sprite compiler for 65C02/6502 to generate assembly code to render all shifts of the given sprite, optionally with exclusive-or drawing (if background will be non-black). Generated code has conditional compilation directives for the CC65 assembler to allow the same file to be compiled for either architecture.")
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parser.add_argument("-v", "--verbose", default=0, action="count")
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parser.add_argument("-t", "--tables", action="store_true", default=False, help="output only lookup tables for horizontal sprite shifts (division and modulus 7)")
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parser.add_argument("-x", "--xdraw", action="store_true", default=False, help="use XOR for sprite drawing")
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parser.add_argument("files", metavar="IMAGE", nargs="*", help="a PNG image [or a list of them]. PNG files must not have an alpha channel!")
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options, extra_args = parser.parse_known_args()
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if options.tables:
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print HorizontalLookup()
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exit(0)
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for pngfile in options.files:
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try:
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print Sprite(pngfile, options.xdraw)
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except RuntimeError:
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parser.usage()
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