//---------------------------------------------------------------------
public void foreachPixel(onPixel fun)
{
for (int y = 0; y < height; ++y)
{
// ImageLine的Scanline出来的行数据，表示RGBA
ImageLine pngLine = mPngReader.ReadRowInt(y);
int[] pngLineArray = pngLine.Scanline;
for (int x = 0; x < width; ++x)
{
fun(_isBlackColor(pngLineArray, x), x, y);
}
}
}
//---------------------------------------------------------------------
public void foreachPixel(onPixel fun)
{
for (int y = 0; y < height; ++y)
{
// ImageLine的Scanline出来的行数据，表示RGBA
ImageLine pngLine = mPngReader.ReadRowInt(y);
int[] pngLineArray = pngLine.Scanline;
for (int x = 0; x < width; ++x)
{
fun(_isBlackColor(pngLineArray, x), x, y);
}
}
}
