Use L_FrameBitmapRgn
to outline the region.Working with the Existing Bitmap Region
You can save a region in the alpha channel of a 16- or 32-bit file. For an example, refer to L_SetBitmapAlpha.
You can use the L_BitmapHasRgn function to see if a bitmap has a region. If the bitmap has a region, you can do the following with it:
Use L_FrameBitmapRgn
to outline the region.
Display the region using functions described
in Displaying a Region.
Use L_GetBitmapRgnHandle
to create a Windows region that is a snapshot of the bitmap region.
Use L_OffsetBitmapRgn
to move the region.
Use L_GetBitmapRgnArea,
L_GetBitmapRgnBounds,
and L_IsPtInBitmapRgn to
get information about the region's size and location.
Use L_ColorBitmapRgn
to display a filled, color representation of a region.
Use L_FreeBitmapRgn
to free the region.
Determine the number of maximum number of
segments present in any row in the region by calling L_GetBitmapClipSegmentsMax.
Once this is known, a buffer can be allocated and the segments can be
retrieved using the L_GetBitmapClipSegments
function.
To create a new region, or update an existing region, based on either an HSV range or an RGB range, use L_SetBitmapRgnColorHSVRange or L_SetBitmapRgnColorRGBRange. To convert between HSV and RGB color space, use the L_HSVtoRGB and the L_RGBtoHSV functions.
To create a new curve region, or update an existing region with a curve region, use L_SetBitmapRgnCurve.
To resize a bitmap region a specific number of pixels, use the L_ResizeBitmapRgn function.
Use L_HolesRemovalBitmapRgn to remove holes from a bitmap region.
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