.
internal static void RegisterPNGImage(string name, Uri uri)
{
StreamResourceInfo resourceInfo = Application.GetResourceStream(uri);
if (resourceInfo != null && resourceInfo.Stream != null)
{
BitmapImage image = new BitmapImage();
#if SILVERLIGHT
image.SetSource(resourceInfo.Stream);
#else
image.BeginInit();
image.StreamSource = resourceInfo.Stream;
image.EndInit();
#endif
resourceInfo.Stream.Position = 0;
byte[] header = new byte[8];
resourceInfo.Stream.Read(header, 0, header.Length);
if (header[0] == 0x89 &&
header[1] == 0x50 && // P
header[2] == 0x4E && // N
header[3] == 0x47 && // G
header[4] == 0x0D && // CR
header[5] == 0x0A && // LF
header[6] == 0x1A && // EOF
header[7] == 0x0A) // LF
{
byte[] buffer = new byte[16];
resourceInfo.Stream.Read(buffer, 0, buffer.Length);
Array.Reverse(buffer, 8, 4);
Array.Reverse(buffer, 12, 4);double width = BitConverter.ToInt32(buffer, 8);
double height = BitConverter.ToInt32(buffer, 12);resourceInfo.Stream.Close();
ImageUtils.RegisterImageAsset(name, new ImageAsset(image, width, height));return;
}
resourceInfo.Stream.Close();
}
new Exception("Can not load PNG Image '" + name + "' URI: " + uri);
}在此我替微软向去年当TWaver .NET还在beta中就已经开始在项目中预言和使用客户道歉,我们没有彻底做到DRY,不过始终坚持最大程序减少用户工作量原则的TWaver开发团队,在正式TWaver .NET 1.0发布时提供了让人更舒心的RegisterPNGImage(string name, Uri uri)函数,是的,你不用在告诉TWaver宽高了,TWaver会自动的去获取,至于如何获取很多同学很感兴趣,以下实现代码原理很简单我就不解释了,总之条条道路通罗马,Silverlight不提供的我们也能走出自己的路