Applies an anti-aliasing filter to the specified bitmap.
L_LTIMGEFX_API L_INT L_AntiAliasBitmap(pBitmap, nThreshold, uDim, uFilter, uFlags)
Pointer to the bitmap handle that references the bitmap on which to apply the filter.
Threshold value that indicates which pixels to smooth. The application of the anti-aliasing filter on the image associates a value with each pixel. Only pixels with values above this threshold are smoothed.
Value that indicates the size of the anti-aliasing mask. For example, a value of three indicates an anti-aliasing mask of 3 X 3.
Flag that indicates the type of anti-aliasing filter to use. Possible values are:
|ANTIALIAS_1||[0x0000] Anti-alias the bitmap vertically and horizontally.|
|ANTIALIAS_2||[0x0001] Anti-alias the bitmap in all directions.|
|ANTIALIAS_3||[0x0002] Anti-alias the bitmap in all directions. The filter used for this option is different from the filter used for the ANTIALIAS_2 option.|
|ANTIALIAS_DIAG||[0x0003] Anti-alias the bitmap diagonally.|
|ANTIALIAS_HORZ||[0x0004] Anti-alias the bitmap horizontally.|
|ANTIALIAS_VERT||[0x0005] Anti-alias the bitmap vertically.|
Reserved for future use. Must be 0.
|SUCCESS||The function was successful.|
|< 1||An error occurred. Refer to Return Codes.|
This function can process the whole image or a region of the image.
This function supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available in the Document and Medical Imaging toolkits.
The best results for anti-aliasing text can be obtained with the filter ANTIALIAS_2.
The value of the
uDim parameter determines the extent of the anti-aliasing.
The threshold range for 16, 48 and 64-bit images is from 0 to 65535 for unsigned images, and from –32768 to +32767 for signed images. For 12-bit images, the threshold range is from 0 to 4095 for unsigned images, and from –2048 to +2047 for signed images. Otherwise, it is from 0 to 255. The threshold is applied to channels separately.
This function does not support 32-bit grayscale images. It returns the error code ERROR_GRAY32_UNSUPPORTED if a 32-bit grayscale image is passed to this function.
Win32, x64, Linux.
BITMAPHANDLE LeadBitmap; /* Bitmap handle to hold the loaded image. */
/* Load the bitmap, keeping the bits per pixel of the file */
nRet = L_LoadBitmap (MAKE_IMAGE_PATH(TEXT("Jagged.jpg")), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL);
/* do the anti-aliasing on the bitmap */
nRet = L_AntiAliasBitmap (&LeadBitmap, 128, 3, ANTIALIAS_1, 0);
nRet = L_SaveBitmap(MAKE_IMAGE_PATH(TEXT("Result.BMP")), &LeadBitmap, FILE_BMP, 24, 0, NULL);
Medical Web Viewer .NET
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