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

Functions:	L_UnderlayBitmap, L_CombineBitmap, L_FeatherAlphaBlendBitmap, L_CreateFadedMask, L_TextureAlphaBlendBitmap, L_DisplaceMapBitmap, L_OffsetBitmap, L_OffsetBitmapRgn, L_BumpMapBitmap, L_CanvasBitmap, L_CombineBitmapWarp, L_BricksTextureBitmap
Topics:	Raster Image Functions: Combining Images
	Applying Artistic Effects
	Raster Image Functions: Artistic Effects

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);