L_LTDIS_API L_INT L_SetBitmapRgnFromMask(pBitmap, pXForm, pMask, uCombineMode)
Creates or updates the bitmap region by adding a region that consists of all the white pixels in a 1-bit mask image.
Pointer to the bitmap handle referencing the bitmap where the region is to be created or updated.
Pointer to an RGNXFORM structure that LEADTOOLS uses to translate between display coordinates and bitmap coordinates.
If you specify NULL in this parameter, the scalar fields default to 1, the offsets default to 0, and the view perspective defaults to the target bitmap's view perspective.
The 1-bit black-and-white image used as a mask.
The action to take regarding the existing bitmap region, if one is defined. For descriptions of the possible values, refer to Creating a Bitmap Region.
|SUCCESS||The function was successful.|
|< 1||An error occurred. Refer to Return Codes.|
Before calling this function, you must declare an RGNXFORM structure and set its values, which LEADTOOLS uses to translate between device context coordinates and bitmap coordinates. For details about how the structure works refer to the RGNXFORM structure description. For a description of common usage, refer to Translating Coordinates for a Bitmap Region.
To update an existing region, you specify how the new region is to be combined with the existing one. For descriptions of the possibilities, refer to Creating a Bitmap Region.
Required DLLs and Libraries
Win32, x64, Linux.
This example sets a region into a bitmap using a 1-bit black-and-white mask image.
L_INT SetBitmapRgnFromMaskExample(pBITMAPHANDLE pBitmap)
BITMAPHANDLE MaskBitmap; /* Bitmap handle that holds the mask bitmap */
nRet = L_LoadBitmap (MAKE_IMAGE_PATH(TEXT("clean.tif")), &MaskBitmap, sizeof(BITMAPHANDLE), 1, ORDER_BGR, NULL, NULL );
if(nRet != SUCCESS)
nRet = L_SetBitmapRgnFromMask ( pBitmap, NULL, &MaskBitmap, L_RGN_SET );
if(nRet != SUCCESS)
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