PaintBuffer(RasterImage,IntPtr,LeadRect,LeadRect,LeadRect,LeadRect,IntPtr,Int32,Int32,RasterPaintProperties) Method

public static void PaintBuffer( 
   RasterImage image,
   IntPtr hdc,
   LeadRect srcRect,
   LeadRect srcClipRect,
   LeadRect destRect,
   LeadRect destClipRect,
   IntPtr buffer,
   int row,
   int count,
   RasterPaintProperties properties
)

'Declaration
 
Public Overloads Shared Sub PaintBuffer( _
   ByVal image As RasterImage, _
   ByVal hdc As IntPtr, _
   ByVal srcRect As LeadRect, _
   ByVal srcClipRect As LeadRect, _
   ByVal destRect As LeadRect, _
   ByVal destClipRect As LeadRect, _
   ByVal buffer As IntPtr, _
   ByVal row As Integer, _
   ByVal count As Integer, _
   ByVal properties As RasterPaintProperties _
) 

'Usage
 
Dim image As RasterImage
Dim hdc As IntPtr
Dim srcRect As LeadRect
Dim srcClipRect As LeadRect
Dim destRect As LeadRect
Dim destClipRect As LeadRect
Dim buffer As IntPtr
Dim row As Integer
Dim count As Integer
Dim properties As RasterPaintProperties
 
RasterImagePainter.PaintBuffer(image, hdc, srcRect, srcClipRect, destRect, destClipRect, buffer, row, count, properties)

public static void PaintBuffer( 
   RasterImage image,
   IntPtr hdc,
   LeadRect srcRect,
   LeadRect srcClipRect,
   LeadRect destRect,
   LeadRect destClipRect,
   IntPtr buffer,
   int row,
   int count,
   RasterPaintProperties properties
)

 function Leadtools.Drawing.RasterImagePainter.PaintBuffer(RasterImage,IntPtr,LeadRect,LeadRect,LeadRect,LeadRect,IntPtr,Int32,Int32,RasterPaintProperties)( 
   image ,
   hdc ,
   srcRect ,
   srcClipRect ,
   destRect ,
   destClipRect ,
   buffer ,
   row ,
   count ,
   properties 
)

public:
static void PaintBuffer( 
   RasterImage^ image,
   IntPtr hdc,
   LeadRect srcRect,
   LeadRect srcClipRect,
   LeadRect destRect,
   LeadRect destClipRect,
   IntPtr buffer,
   int row,
   int count,
   RasterPaintProperties properties
) 

Parameters

image

The source image.

hdc

The destination Windows device context handle where the image data will be displayed.

srcRect

A Leadtools.LeadRect object that specifies the part of the image to use as the display source.

The coordinates in the srcRect rectangle are relative to the image. You can pass Rectangle.Empty to use the default, which matches the image.

srcClipRect

A Leadtools.LeadRect object 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.

The coordinates in the srcClipRect rectangle are relative to the image. You can pass Rectangle.Empty to use the default, which matches the image

destRect

A Leadtools.LeadRect object that determines how the source rectangle is scaled and how the image is positioned in the destination hdc handle.

The coordinates in the destRect object are relative to the hdc handle. There is no default for this parameter. You must specify the Leadtools.LeadRect object.

destClipRect

A Leadtools.LeadRect object 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 destClipRect are relative to the device context handle. You can pass Rectangle.Empty to use the default, which matches the device context handle. In most cases, however, you should use the rectangle returned by the .NET PaintEventArgs.ClipRectangle or Windows WM_PAINT message.

buffer

Pointer to the unmanaged memory buffer that contains the image data to paint

row

The first row to paint. The painted portion of any row may be limited by the rectangle parameters.

count

The number of rows to paint. The painted portion of any row may be limited by the rectangle parameters.

If the image data in buffer is compressed 1-bit data, you can specify the number of lines as a negative value (-lines), as explained in Speeding Up 1-Bit Documents.

properties

Options for the display.

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

If destRect is larger or smaller than the image's actual dimensions, then the image will be scaled to fit destRect.

If the image data in buffer is compressed 1-bit data, you can specify the number of lines as a negative value (-row), as explained in Speeding Up 1-Bit Documents.

The following properties are used from this Leadtools.RasterImage:

• RasterImage.Width
• RasterImage.Height
• RasterImage.BitsPerPixel
• RasterImage.Order
• RasterImage.ViewPerspective
• RasterImage.GetPalette if the image uses a palette.

Except for the buffer specifications, this method uses source and destination rectangles the same as Paint(RasterImage,Graphics,LeadRect,RasterPaintProperties). For a complete explanation, refer to Paint(RasterImage,Graphics,LeadRect,RasterPaintProperties).

You can call PaintBuffer(RasterImage,Graphics,LeadRect,LeadRect,LeadRect,LeadRect,Byte[],Int32,Int32,Int32,RasterPaintProperties) from a callback procedure to paint an image while it is being loaded.

For more information refer to RasterImage and GDI/GDI+.

For more information, refer to Changing Image Coordinates.

For more information, refer to Handling Palette Changes.

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

RasterImagePainter Class
RasterImagePainter Members
Overload List