pngToBin.py

import math

def ZOrderX(tileSize, count):
    div = tileSize // 2;
    x_in = count // div & div;
    while div > 1:
        div = div // 2;
        x_in |= count // div & div;
    return x_in;

def ZOrderY(tileSize, count):
    div = tileSize;
    div2 = tileSize // 2;
    y_in = count // div & div2;
    while div2 > 1:
        div = div //2;
        div2 = div2 //2;
        y_in |= count // div & div2;
    return y_in;

def getPointSequence(width, height, orientation = False, tileSize = 8, zOrder = True):
    strideWidth, strideHeight = (width + 7) & ~7, (height + 7) & ~ 7;
    if zOrder:
        tileSize = 2 << int(math.log(((tileSize + 7) & ~7) - 1, 2));
    powTileSize = int(tileSize ** 2);
    stride = strideWidth;

    for i in range(strideWidth * strideHeight):
        x_out, y_out, x_in, y_in = 0, 0, 0, 0;
        if zOrder:
            x_out = (i // powTileSize % (stride // tileSize)) * tileSize;
            y_out = (i // powTileSize // (stride // tileSize)) * tileSize;
            x_in = ZOrderX(tileSize, i);
            y_in = ZOrderY(tileSize, i);
        yield (x_out + x_in, y_out + y_in);