L_FragmentBitmap
#include "l_bitmap.h"
L_INT EXT_FUNCTION L_FragmentBitmap(pBitmap, uOffset, uOpacity)
pBITMAPHANDLE pBitmap; |
/* pointer to the bitmap handle */ |
L_UINT uOffset; |
/* image displacement */ |
L_UINT uOpacity; |
/* transparency percentage */ |
Averages a bitmap with its shifted copies. This function is available in the Raster Pro and above toolkits.
Parameter |
Description |
pBitmap |
Pointer to the bitmap handle that references the bitmap to which to apply the effect. |
uOffset |
Value that indicates the number of pixels the copied image is shifted. |
uOpacity |
Value that indicates the transparency, in percent, of the copy in comparison to the original image. Possible values range from 0 to 100. A value of 0 means the resulting image will be black. A value of 100 means that each copy's value will comprise 25% of the result. |
Returns
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Comments
This function creates four copies of an image. Each copy is shifted by the offset amount into one of the four directions: top, left, bottom and right. Then the bitmap is averaged with its shifted copies.
Use the L_DisplaceMapBitmap function to displace a bitmap's pixels horizontally and vertically according to the values of the displacement map image.
Use the L_OffsetBitmap function to shift a bitmap's pixels horizontally and vertically.
Use the L_OffsetBitmapRgn function to move a bitmap region by the specified number of rows and columns.
This function can process the whole image or a region of the image. If a bitmap has a region, the effect is applied only to the region.
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 only in the Document/Medical 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 signed data images. It returns the error code ERROR_SIGNED_DATA_NOT_SUPPORTED if a signed data image is passed to this function.
Required DLLs and Libraries
LTIMG For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
Platforms
Windows 95 / 98 / Me, Windows 2000 / XP.
See Also
Example
/*Apply the fragment effect with four pixel shifting and opacity = 100 */
BITMAPHANDLE LeadBitmap; /* Bitmap handle for the image */
/* Load a bitmap at its own bits per pixel */
L_LoadBitmap (TEXT("Image1.cmp"), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGRORGRAY, NULL, NULL);
/* Apply the effect*/
L_FragmentBitmap(&LeadBitmap, 4, 100);