public override void run()
{
Screenshot screenshot = null;
if (this.screenshots.TryDequeue(out screenshot) == false)
{
return;
}
if (screenshot == null)
{
return;
}
// 分辨率是否发生了变化？
if (lastScreen != null && (lastScreen.width != screenshot.width || lastScreen.height != screenshot.height))
{
lastScreen = null;
}
// 1. 求差
UInt32[] bitmap = new UInt32[screenshot.width * screenshot.height];
int changedColors = 0, start = -1, end = bitmap.Length;
if (lastScreen != null)
{
for (int i = 0; i < bitmap.Length; i++)
{
if (lastScreen.bitmap[i] == screenshot.bitmap[i])
{
bitmap[i] = 0;
}
else
{
if (start == -1)
{
start = i;
}
else
{
end = i;
}
changedColors += 1;
lastScreen.bitmap[i] = bitmap[i] = screenshot.bitmap[i];
}
}
}
else
{
bitmap = screenshot.bitmap;
}
if (lastScreen != null && changedColors == 0)
{
return;
}
// Console.WriteLine("Changed colors: " + changedColors);
// 2. 压缩
start = 0;
end = screenshot.width * screenshot.height;
byte[] compressedData = CompressUtil.process("rle", bitmap, start, end);
// 3. 发送到服务器端
Packet packet = Packet.create(Command.SCREENSHOT, compressedData.Length + 16);
packet.addShort((short)screenshot.width)
.addShort((short)screenshot.height)
.addLong(screenshot.captureTime)
.addInt(sequence++);
packet.addBytes(compressedData);
client.send(packet.getBytes());
if (null == lastScreen)
{
UInt32[] bmp = new UInt32[screenshot.width * screenshot.height];
Array.Copy(screenshot.bitmap, bmp, bmp.Length);
lastScreen = new Screenshot(bmp, screenshot.width, screenshot.height);
}
}
