Public Property Index As Integer

Visual Basic (Usage)	Copy Code
Dim instance As RasterImageAnimator Dim value As Integer   instance.Index = value   value = instance.Index

public int Index {get; set;}

public:
property int Index {
   int get();
   void set (int value);
}

Return Value

This example uses Index to skip frames during a playback

Visual Basic

Copy Code

Sub RasterImageAnimatorIndexExample(ByVal panel As Panel)    ' Initialize the RasterCodecs object    RasterCodecs.Startup()    Dim codecs As New RasterCodecs()    ' Load the animated GIF file    Dim fileName As String = LeadtoolsExamples.Common.ImagesPath.Path + "Eye.gif"    Dim animatedImage As RasterImage = codecs.Load(fileName)    ' Create the target image, we want it to be in the animated image size    Dim targetImage As New RasterImage( _       RasterMemoryFlags.Conventional, _       animatedImage.AnimationGlobalSize.Width, _       animatedImage.AnimationGlobalSize.Height, _       animatedImage.BitsPerPixel, _       animatedImage.Order, _       animatedImage.ViewPerspective, _       Nothing, _       IntPtr.Zero, _       0)    ' Copy the palette from the animated image to this newly created image    animatedImage.CopyPaletteTo(targetImage)    ' Create the RasterImageAnimator object    Dim animator As New RasterImageAnimator(targetImage, animatedImage)    ' Animate it    ' Use GDI+ paint engine to support transparent colors    Dim props As RasterPaintProperties = RasterPaintProperties.Default    props.PaintEngine = RasterPaintEngine.GdiPlus    Dim g As Graphics = panel.CreateGraphics()    Dim state As RasterImageAnimatorState    Do       Dim srcRect As New Rectangle(0, 0, targetImage.ImageWidth, targetImage.ImageHeight)       Dim updateRect As Rectangle       Dim destRect As Rectangle       Dim index As Integer       state = animator.Process()       Select Case (state)          Case RasterImageAnimatorState.WaitDelay, _             RasterImageAnimatorState.WaitInputDelay, _             RasterImageAnimatorState.Render             'Continue processing          Case RasterImageAnimatorState.WaitInput             ' In case the animated image has the "wait for user input" flags,             ' cancel the waiting             animator.CancelWait()          Case RasterImageAnimatorState.PreRender             index = animator.Index             index = index + 1             animator.Index = index          Case RasterImageAnimatorState.PostRender             ' Get the area in the target image that has changed             updateRect = animator.GetUpdateRectangle(True)             ' Paint it             destRect = New Rectangle(0, 0, targetImage.ImageWidth, targetImage.ImageHeight)             targetImage.Paint(g, srcRect, updateRect, destRect, destRect, props)       End Select    Loop While (state <> RasterImageAnimatorState.End)    g.Dispose()    animator.Dispose()    targetImage.Dispose()    animatedImage.Dispose()    codecs.Dispose()    RasterCodecs.Shutdown() End Sub

C#

Copy Code

void RasterImageAnimatorIndexExample(Panel panel)  {     // Initialize the RasterCodecs object     RasterCodecs.Startup();     RasterCodecs codecs = new RasterCodecs();       // Load the animated GIF file     string fileName = LeadtoolsExamples.Common.ImagesPath.Path + "Eye.gif";     RasterImage animatedImage = codecs.Load(fileName);       // Create the target image, we want it to be in the animated image size     RasterImage targetImage = new RasterImage(        RasterMemoryFlags.Conventional,        animatedImage.AnimationGlobalSize.Width,        animatedImage.AnimationGlobalSize.Height,        animatedImage.BitsPerPixel,        animatedImage.Order,        animatedImage.ViewPerspective,        null,        IntPtr.Zero,        0);       // Copy the palette from the animated image to this newly created image     animatedImage.CopyPaletteTo(targetImage);       // Create the RasterImageAnimator object     RasterImageAnimator animator = new RasterImageAnimator(targetImage, animatedImage);       // Animate it       // Use GDI+ paint engine to support transparent colors     RasterPaintProperties props = RasterPaintProperties.Default;     props.PaintEngine = RasterPaintEngine.GdiPlus;       Graphics g = panel.CreateGraphics();       RasterImageAnimatorState state;     do     {        Rectangle srcRect = new Rectangle(0, 0, targetImage.ImageWidth, targetImage.ImageHeight);        Rectangle updateRect;        Rectangle destRect;        int index;          state = animator.Process();          switch(state)        {           case RasterImageAnimatorState.WaitDelay:           case RasterImageAnimatorState.WaitInputDelay:           case RasterImageAnimatorState.Render:              // Continue processing              break;             case RasterImageAnimatorState.WaitInput:              // In case the animated image has the "wait for user input" flags,              // cancel the waiting              animator.CancelWait();              break;             case RasterImageAnimatorState.PreRender:              index = animator.Index;              index++;              animator.Index = index;              break;             case RasterImageAnimatorState.PostRender:              // Get the area in the target image that has changed              updateRect = animator.GetUpdateRectangle(true);                // Paint it              destRect = new Rectangle(0, 0, targetImage.ImageWidth, targetImage.ImageHeight);                targetImage.Paint(g, srcRect, updateRect, destRect, destRect, props);              break;             default:              break;        }     }     while(state != RasterImageAnimatorState.End);       g.Dispose();       animator.Dispose();       targetImage.Dispose();     animatedImage.Dispose();       codecs.Dispose();     RasterCodecs.Shutdown();  }

You can use the Index property to skip frames during a playback if required.

Target Platforms: Microsoft .NET Framework 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family

Reference