The fastest way to draw a series of bitmaps using C #

Question

I create an application that captures video frames from a camera (30fps @ 640x480), processes them, and then displays them in a Windows form. At first I used DrawImage (see code below), but the performance was terrible. Even with the processing step disabled, the best I can get is 20 frames per second on a 2.8 GHz Core 2 Duo processor. Double buffering is enabled in Windows form, otherwise I am tearing.

Note. The image used is a raster image format Format24bppRgb. I know that DrawImage should be faster with Format32bppArgb formatted image, but I'm limited to the format that comes out of the frame grabber.

private void CameraViewForm_Paint(object sender, PaintEventArgs e)
{
    Graphics g = e.Graphics;

    // Maximize performance
    g.CompositingMode = CompositingMode.SourceOver;
    g.PixelOffsetMode = PixelOffsetMode.HighSpeed;
    g.CompositingQuality = CompositingQuality.HighSpeed;
    g.InterpolationMode = InterpolationMode.NearestNeighbor;
    g.SmoothingMode = SmoothingMode.None;

    g.DrawImage(currentFrame, displayRectangle);
}

Managed DirectX 9 (. ), . DirectX, DirectX.

private void CameraViewForm_Paint(object sender, PaintEventArgs e)
{
    device.Clear(ClearFlags.Target, Color.Black, 1.0f, 0);

    device.BeginScene();

    Texture texture = new Texture(device, currentFrame, Usage.None, Pool.Managed);
    Rectangle textureSize;

    using (Surface surface = texture.GetSurfaceLevel(0))
    {
        SurfaceDescription surfaceDescription = surface.Description;
        textureSize = new Rectangle(0, 0, surfaceDescription.Width, surfaceDescription.Height);
    }
    Sprite sprite = new Sprite(device);

    sprite.Begin(SpriteFlags.None);
    sprite.Draw(texture, textureSize, new Vector3(0, 0, 0), new Vector3(0, 0, 0), Color.White);
    sprite.End();

    device.EndScene();

    device.Present();

    sprite.Dispose();
    texture.Dispose();
}

XP, Vista Windows 7. , XNA OpenGL. , .

Answer 1

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Texture texture;
Rectangle textureSize;
private void InitiateTexture()
{
    texture = new Texture(device, new Bitmap("CAR.jpg"), Usage.None, Pool.Managed);

    using (Surface surface = texture.GetSurfaceLevel(0))
    {
        SurfaceDescription surfaceDescription = surface.Description;
        textureSize = new Rectangle(0, 0, 
                          surfaceDescription.Width, 
                          surfaceDescription.Height);
    }
}
protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
{
    device.Clear(ClearFlags.Target, Color.DarkSlateBlue, 1.0f, 0);
    device.BeginScene();

    Sprite sprite = new Sprite(device);

    sprite.Begin(SpriteFlags.None);
    sprite.Draw(texture, textureSize, 
    new Vector3(0, 0, 0), 
    new Vector3(0, 0, 0), Color.White);
    sprite.End();
    device.EndScene();
    device.Present();
}

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Answer 2

CameraViewForm ? , Paint , , .. doo-dads, (, ).

, Panel ( , displayRectangle) BufferedGraphicsContext, , GreateGraphics() Invalidate() . .