PaintImageEffect(IntPtr,RasterImage,Rectangle,Rectangle,Rectangle,Rectangle,RasterPaintProperties,SpecialEffectsType,SpecialEffectsProgress) Method

Applies an effect when painting a bitmap to a screen. The effect, commonly used for slide show transitions, specifies how the image is painted, not how it looks when painting is finished.

Syntax

Visual Basic
C#
WinRT C#
WinRT JavaScript
C++

public void PaintImageEffect( 
   IntPtr hdc,
   RasterImage image,
   Rectangle src,
   Rectangle srcClip,
   Rectangle dest,
   Rectangle destClip,
   RasterPaintProperties paintProperties,
   SpecialEffectsType effectType,
   SpecialEffectsProgress progressCallback
)

'Declaration
 
Public Overloads Sub PaintImageEffect( _
   ByVal hdc As IntPtr, _
   ByVal image As RasterImage, _
   ByVal src As Rectangle, _
   ByVal srcClip As Rectangle, _
   ByVal dest As Rectangle, _
   ByVal destClip As Rectangle, _
   ByVal paintProperties As RasterPaintProperties, _
   ByVal effectType As SpecialEffectsType, _
   ByVal progressCallback As SpecialEffectsProgress _
)

'Usage
 
Dim instance As SpecialEffectsProcessor
Dim hdc As IntPtr
Dim image As RasterImage
Dim src As Rectangle
Dim srcClip As Rectangle
Dim dest As Rectangle
Dim destClip As Rectangle
Dim paintProperties As RasterPaintProperties
Dim effectType As SpecialEffectsType
Dim progressCallback As SpecialEffectsProgress
 
instance.PaintImageEffect(hdc, image, src, srcClip, dest, destClip, paintProperties, effectType, progressCallback)

public void PaintImageEffect( 
   IntPtr hdc,
   RasterImage image,
   Rectangle src,
   Rectangle srcClip,
   Rectangle dest,
   Rectangle destClip,
   RasterPaintProperties paintProperties,
   SpecialEffectsType effectType,
   SpecialEffectsProgress progressCallback
)

 function Leadtools.SpecialEffects.SpecialEffectsProcessor.PaintImageEffect(IntPtr,RasterImage,Rectangle,Rectangle,Rectangle,Rectangle,RasterPaintProperties,SpecialEffectsType,SpecialEffectsProgress)( 
   hdc ,
   image ,
   src ,
   srcClip ,
   dest ,
   destClip ,
   paintProperties ,
   effectType ,
   progressCallback 
)

public:
void PaintImageEffect( 
   IntPtr hdc,
   RasterImage^ image,
   Rectangle src,
   Rectangle srcClip,
   Rectangle dest,
   Rectangle destClip,
   RasterPaintProperties paintProperties,
   SpecialEffectsType effectType,
   SpecialEffectsProgress^ progressCallback
)

Parameters

hdc: Handle to the target device context.
image: Pointer to an object that references the image to paint.
src: Rectangle that specifies the part of the image to use as the display source.
srcClip: Rectangle that specifies the portion of the display source to paint. Generally, this is used for updating the display when part of the source image has changed.
dest: Rectangle that determines how the source rectangle is scaled and how the image is positioned in the device context. The coordinates for the Rectangle object are relative to the device context. There is no default for this parameter. You must specify the Rectangle object.
destClip: Rectangle to be used as the display destination clipping rectangle that specifies the portion of the display rectangle to paint. Generally, this is used for updating changes in the display surface, such as when a user moves another window, uncovering a part of the image that had been covered up. The coordinates in the Rectangle object are relative to the device context. You can pass null to use the default, which matches the device context.
paintProperties: Options for the display.
effectType: Effect to apply when painting. For valid values, refer to SpecialEffectsType.
progressCallback: Callback method that will be called when the paint image effect is started to determine the status for the paint of the image effect.

Remarks

If the screen has fewer colors than the image, this method dithers the output to that display surface without affecting the actual image data.

PaintImageEffect paints an image faster if its view perspective is bottom left. LEAD CMP images have a bottom-left view perspective, but some other formats have a top-left perspective. To get uniformly fast paints on all images, you can set the perspective after you load them. (You do not have to change them back before saving them in the original format, because the save methods set the orientation for the specified format.)

Multipass painting for the PushClass is disabled.

Example

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Public Sub PaintImageEffect(ByVal g As Graphics, ByVal destRect As Rectangle)
      Dim processor As SpecialEffectsProcessor = New SpecialEffectsProcessor()
      Dim properties As RasterPaintProperties = New RasterPaintProperties()
      properties.RasterOperation = RasterPaintProperties.SourceCopy

      Dim codecs As RasterCodecs = New RasterCodecs()
      Dim rasterImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"))

      processor.PaintImageEffect(g, rasterImage, Rectangle.Empty, Rectangle.Empty, destRect, Rectangle.Empty, properties, SpecialEffectsType.SpiralIn, Nothing)

      rasterImage.Dispose()
   End Sub

Public NotInheritable Class LEAD_VARS
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class

public void PaintImageEffect(Graphics g, Rectangle destRect)
   {
      SpecialEffectsProcessor processor = new SpecialEffectsProcessor();
      RasterPaintProperties properties = new RasterPaintProperties();
      properties.RasterOperation = RasterPaintProperties.SourceCopy;

      RasterCodecs codecs = new RasterCodecs();
      RasterImage rasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"));

      processor.PaintImageEffect(g, rasterImage,
                                 Rectangle.Empty, /* Default source rectangle */
                                 Rectangle.Empty, /* Default source clip area */
                                 destRect, /* Destination rectangle */
                                 Rectangle.Empty, /* Default destination clipping rectangle */
                                 properties,
                                 SpecialEffectsType.SpiralIn, /* Spiral effect */
                                 null);

      rasterImage.Dispose();
   }

static class LEAD_VARS
{
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

SpecialEffectsProcessor Class
SpecialEffectsProcessor Members
Overload List