AR Red Envelope

Alipay.cs

// 自用的代码，不同机型可能需要修改偏移
private void FixRange(Bitmap bitmap, int y1, int y2)
{
    int top = (y2 - y1) / 2 + (y2 - y1) % 2;
    int bottom = (y2 - y1) - top;
    for (int y = y1; y <= y1 + top; ++y)
    {
        for (int x = 205; x < 205 + 340; ++x)
        {
            int targety = y - top;
            var pixel = bitmap.GetPixel(x, targety);
            bitmap.SetPixel(x, y, pixel);
        }
    }
    for (int y = y2; y > y1 + top - ((y2 - y1) % 2); --y)
    {
        for (int x = 205; x < 205 + 340; ++x)
        {
            int targety = y + bottom;
            var pixel = bitmap.GetPixel(x, targety);
            bitmap.SetPixel(x, y, pixel);
        }
    }
}

private void FillWhite(Bitmap bitmap)
{
    for (int x = 0; x < bitmap.Width; ++x)
    {
        for (int y = 0; y < 638; ++y)
        {
            bitmap.SetPixel(x, y, Color.White);
        }
        for (int y = 638 + 340; y < bitmap.Height; ++y)
        {
            bitmap.SetPixel(x, y, Color.White);
        }
    }
    for (int y = 638; y < 638 + 340; ++y)
    {
        for (int x = 0; x < 205; ++x)
        {
            bitmap.SetPixel(x, y, Color.White);
        }
        for (int x = 205 + 340; x < bitmap.Width; ++x)
        {
            bitmap.SetPixel(x, y, Color.White);
        }
    }
}

private void button_Click(object sender, EventArgs e)
{
    using (Bitmap bitmap = (Bitmap)Bitmap.FromFile(@"D:\bmp\input.bmp", false))
    {
        if (bitmap.Width != 750 || bitmap.Height != 1334)
        {
            return;
        }
        FillWhite(bitmap);
        int end = 638 + 2;
        int count = 0;
        while (true)
        {
            ++count;
            int begin = end + 7;
            if (count % 7 == 0)
            {
                ++begin;
            }
            end = begin + 5;
            if (end >= 638 + 340)
            {
                break;
            }
            FixRange(bitmap, begin, end);
        }
        bitmap.Save(@"D:\bmp\output.bmp");
    }
}