JCL Help:CreateRegionFromBitmap

 JCL Help: CreateRegionFromBitmap Function

Graphics.Bitmaps, $Graphics.Regions

JEDI Code Library Help

• Packages
  • RTL enhancements
  • Containers
  • Developer Tools
  • VCL enhancements
• Files
  • Classes
  • Interfaces
  • Functions
  • Variables
  • Constants
  • Types
  • Records
• Project summary
• License

Search in JCL Help

 

Search in all projects

 

Summary

Creates the region from the specified bitmap.

Pascal

 function CreateRegionFromBitmap(Bitmap: TBitmap; RegionColor: TColor; RegionBitmapMode: TJclRegionBitmapMode; UseAlphaChannel: Boolean = False): HRGN;

Parameters

Parameters	Description
Bitmap: TBitmap	A bitmap used as input to create the region.
RegionColor: TColor	The color for the mask.
RegionBitmapMode: TJclRegionBitmapMode	This flag specifies if the RegionColor is included or excluded.

Return Value

The region handle.

Description

This function creates the region from a bitmap by specifing a color. You can use this function to make custom forms of bitmaps, or hotspots on your bitmap, like a map of europe for instance with every country in a different color. Create the regions for every color. The RegionBitmapMode can be rmInclude or rmExclude, with rmInclude all pixels of RegionColor will be in the region, with rmExclude all pixels except those of RegionColor will be in the region.

See Also

TJclRegionBitmapMode CreateBitmap

About

Unit

JclGraphics

Donator

Wim De Cleen

Contribute to this help topic

This documentation wiki is based on the collaborative effort of Project JEDI users. Your edits are welcome in order to improve documentation quality: edit this page

The JEDI Code Library source code is hosted at : link to view the current source code, link to the subversion repository