L_LTIMGSFX_API L_INT L_FreeHandWaveBitmap (pBitmap, pAmplitudes, uAmplitudesCount, uScale, uWaveLen, nAngle, crFill, uFlags)
Distorts the bitmap by the wave specified in
pAmplitudes and the rotation angle specified in
Pointer to the bitmap handle that references the bitmap on which to apply the effect.
Array of integers that represent wave values. The real value of the array elements is divided by 1000, and the valid value of each element in pAmplitudes array is between 1000 and 1000. These values are generally obtained from the L_GetCurvePoints function. They may also be obtained through the FreeHandWave Dialog.
Number of entries in the
Factor used to increase or decrease the various amplitude values in the pAmplitudes array. Each value in the
pAmplitudes array is multiplied by this factor. The real factor value is the uScale value divided by 100.
Value that represents the wave length, if DIS_PER is set in the
uFlags parameter. Possible values range from 1 100 and give the wavelength as a percentage of the bitmap dimensions. If DIS_FRQ is set in uFlags, this value is the number of repeated waves.
Wave rotation angle in hundredths of a degree (+/-). The valid range is from 36000 to 36000. The value in degrees is nAngle divided by 100.
The COLORREF value that specifies the fill color for any exposed areas. You can specify a COLORREF value, such as the return value of the Windows RGB macro, or you can use the PALETTEINDEX macro to specify a palette color.
Flags that indicate how to handle exposed areas and the type of information contained in
uWaveLen. You can use a bitwise OR (|) to specify one flag from each group.
|FILL_CLR||[0x0000] Fill any exposed areas with
|FILL_RPT||[0x0001] Stretch the image edges to fill the exposed area.|
|FILL_NOCHG||[0x0002] Leave the exposed area as is, without changing it.|
|DIS_PER||[0x0000] The value in uWaveLen is a wavelength given as a percent of the bitmap dimensions. If this value is set, the valid range of uWaveLen is from 1 to 100.|
|DIS_FRQ||[0x0010] The value in uWaveLen is the frequency, or the number of times the wave repeats.|
|SUCCESS||The function was successful.|
|< 1||An error occurred. Refer to Return Codes.|
This function does not support signed data images. It returns the error code ERROR_SIGNED_DATA_NOT_SUPPORTED if a signed data image is passed to this function.
The function applies the wave in the
pAmplitudes array. You can repeat and rotate the wave in any direction. The pAmplitude data can be obtained from the L_GetCurvePoints function, or from the FreeHandWave Dialog.
If the bitmap has a region, the effect will be applied on the region only.
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.
To update a status bar or detect a user interrupt during execution of this function, refer to L_SetStatusCallback.
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.
Required DLLs and Libraries
This example will apply triangular wave on the loaded image.
BITMAPHANDLE LeadBitmap; /* Bitmap handle for the image */
POINT apUserPoint ;
/* Load a bitmap at its own bits per pixel */
nRet = L_LoadBitmap(MAKE_IMAGE_PATH(TEXT("sample5.cmp")), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL);
apUserPoint .x = 0;
apUserPoint .y = 0;
apUserPoint .x = 3;
apUserPoint .y = 10;
apUserPoint .x = 9;
apUserPoint .y = -10;
apUserPoint .x = 12;
apUserPoint .y = 0;
nRet = L_GetCurvePoints(pAmplitudes, apUserPoint, 4, NULL, GUB_LINEAR);
nRet = L_FreeHandWaveBitmap (&LeadBitmap, pAmplitudes, 13, 100, 10, 0, 0, FILL_RPT | DIS_FRQ);
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