PaintCmykPlanes(RasterImage,IntPtr,LeadRect,LeadRect,LeadRect,LeadRect,RasterPaintProperties,Object) Method

Displays the CMYK planes stored in the image in the given Windows device context handle.

public static void PaintCmykPlanes(  
   Leadtools.RasterImage image, 
   IntPtr hdc, 
   Leadtools.LeadRect srcRect, 
   Leadtools.LeadRect srcClipRect, 
   Leadtools.LeadRect destRect, 
   Leadtools.LeadRect destClipRect, 
   Leadtools.Drawing.RasterPaintProperties properties, 
   object colorConverter 
) 

Public Overloads Shared Sub PaintCmykPlanes( _ 
   ByVal image As Leadtools.RasterImage, _ 
   ByVal hdc As IntPtr, _ 
   ByVal srcRect As Leadtools.LeadRect, _ 
   ByVal srcClipRect As Leadtools.LeadRect, _ 
   ByVal destRect As Leadtools.LeadRect, _ 
   ByVal destClipRect As Leadtools.LeadRect, _ 
   ByVal properties As Leadtools.Drawing.RasterPaintProperties, _ 
   ByVal colorConverter As Object _ 
) 

public: 
static void PaintCmykPlanes(  
   Leadtools.RasterImage^ image, 
   IntPtr hdc, 
   Leadtools.LeadRect srcRect, 
   Leadtools.LeadRect srcClipRect, 
   Leadtools.LeadRect destRect, 
   Leadtools.LeadRect destClipRect, 
   Leadtools.Drawing.RasterPaintProperties properties, 
   Object^ colorConverter 
) 

Parameters

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

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

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.

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.

The image must contain pages that represent each of the CMYK planes.

The data is automatically converted to BGR and dithered (if necessary) without affecting the original data in the image.

The image planes are typically created using RasterCodecs.LoadCmykPlanes.

Windows can only paint BGR data. Therefore, we need to convert CMYK data to BGR during the painting process. You will notice that the painting of regular images (which are already BGR) is faster than the painting of CMYK planes.

The color conversion can be performed using RasterColorConverter.

These conversions are accurate, but are slower than the built-in CMYK->RGB conversion formulas. To use the accurate conversions, create a RasterColorConverter object and pass it as colorConverter. To use the fast conversions, pass null (Nothing for VB) for colorConverter.

Note that there is a visible difference between using a RasterColorConverter object or not. Also, make sure you create a correct CMYK->BGR RasterColorConverter object.

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

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.

For more information, refer to Flags for the PaintDisplayMode Property.

For an example, refer to PaintCmykPlanes(RasterImage,Graphics,LeadRect,LeadRect,LeadRect,LeadRect,RasterPaintProperties,Object).

Target Platforms

Reference

RasterImagePainter Class

RasterImagePainter Members

Overload List