示例1
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
pro = new Thread(new ThreadStart(Producer));
con = new Thread(new ThreadStart(Consumer));
}
private AutoResetEvent m_DataAvailableEvent = new AutoResetEvent(false);
Queue<Bitmap> queue = new Queue<Bitmap>();
Thread pro;
Thread con ;
public void Producer()
{
MemoryStream[] ms = new MemoryStream[3];
for (int y = 0; y < 3; y++)
{
StreamReader reader = new StreamReader("image"+(y+1)+".JPG");
BinaryReader breader = new BinaryReader(reader.BaseStream);
byte[] buffer=new byte[reader.BaseStream.Length];
breader.Read(buffer,0,buffer.Length);
ms[y] = new MemoryStream(buffer);
}
while (true)
{
for (int x = 0; x < 3; x++)
{
Bitmap bmp = new Bitmap(ms[x]);
queue.Enqueue(bmp);
m_DataAvailableEvent.Set();
Thread.Sleep(6);
}
}
}
public void Consumer()
{
Graphics g= pictureBox1.CreateGraphics();
while (true)
{
m_DataAvailableEvent.WaitOne();
Bitmap bmp = queue.Dequeue();
if (bmp != null)
{
// Bitmap bmp = new Bitmap(ms);
g.DrawImage(bmp,new Point(0,0));
bmp.Dispose();
}
}
}
private void pictureBox1_Click(object sender, EventArgs e)
{
con.Start();
pro.Start();
}
}
public Form1()
{
InitializeComponent();
pro = new Thread(new ThreadStart(Producer));
con = new Thread(new ThreadStart(Consumer));
}
private AutoResetEvent m_DataAvailableEvent = new AutoResetEvent(false);
Queue<Bitmap> queue = new Queue<Bitmap>();
Thread pro;
Thread con ;
public void Producer()
{
MemoryStream[] ms = new MemoryStream[3];
for (int y = 0; y < 3; y++)
{
StreamReader reader = new StreamReader("image"+(y+1)+".JPG");
BinaryReader breader = new BinaryReader(reader.BaseStream);
byte[] buffer=new byte[reader.BaseStream.Length];
breader.Read(buffer,0,buffer.Length);
ms[y] = new MemoryStream(buffer);
}
while (true)
{
for (int x = 0; x < 3; x++)
{
Bitmap bmp = new Bitmap(ms[x]);
queue.Enqueue(bmp);
m_DataAvailableEvent.Set();
Thread.Sleep(6);
}
}
}
public void Consumer()
{
Graphics g= pictureBox1.CreateGraphics();
while (true)
{
m_DataAvailableEvent.WaitOne();
Bitmap bmp = queue.Dequeue();
if (bmp != null)
{
// Bitmap bmp = new Bitmap(ms);
g.DrawImage(bmp,new Point(0,0));
bmp.Dispose();
}
}
}
private void pictureBox1_Click(object sender, EventArgs e)
{
con.Start();
pro.Start();
}
}
当创建位图和绘图到图片框是在单独的线程中
然后位图bmp =新位图（ms [x]）需要45.591毫秒
和g.DrawImage（bmp，new Point（0,0））需要41.430毫秒
当我从memoryStream创建位图并将其绘制到一个线程中的图片框时 位图bmp =新位图（ms [x]）取29.619和g.DrawImage（bmp，新点（0,0））取35.540 代码是针对示例2的
为什么在单独的线程中花费更多时间绘制和位图花费时间以及如何减少在单独线程中处理时的时间。我正在使用ANTS性能分析器4.3
public Form1()
{
InitializeComponent();
pro = new Thread(new ThreadStart(Producer));
con = new Thread(new ThreadStart(Consumer));
}
private AutoResetEvent m_DataAvailableEvent = new AutoResetEvent(false);
Queue<MemoryStream> queue = new Queue<MemoryStream>();
Thread pro;
Thread con ;
public void Producer()
{
MemoryStream[] ms = new MemoryStream[3];
for (int y = 0; y < 3; y++)
{
StreamReader reader = new StreamReader("image"+(y+1)+".JPG");
BinaryReader breader = new BinaryReader(reader.BaseStream);
byte[] buffer=new byte[reader.BaseStream.Length];
breader.Read(buffer,0,buffer.Length);
ms[y] = new MemoryStream(buffer);
}
while (true)
{
for (int x = 0; x < 3; x++)
{
// Bitmap bmp = new Bitmap(ms[x]);
queue.Enqueue(ms[x]);
m_DataAvailableEvent.Set();
Thread.Sleep(6);
}
}
}
public void Consumer()
{
Graphics g= pictureBox1.CreateGraphics();
while (true)
{
m_DataAvailableEvent.WaitOne();
//Bitmap bmp = queue.Dequeue();
MemoryStream ms= queue.Dequeue();
if (ms != null)
{
Bitmap bmp = new Bitmap(ms);
g.DrawImage(bmp,new Point(0,0));
bmp.Dispose();
}
}
}
private void pictureBox1_Click(object sender, EventArgs e)
{
con.Start();
pro.Start();
}