L_ExpandRow

#include "l_bitmap.h"

L_LTKRN_API L_INT L_ExpandRow(pRunBuffer, pBuffer, nCol, nWidth)

L_UINT16* pRunBuffer;

/* pointer to the input buffer */

L_UCHAR* pBuffer;

/* pointer to the output buffer */

L_UINT nCol;

/* column offset within the row to process */

L_INT nWidth;

/* number of pixels to process */

Does buffer-to-buffer decompression of RLE-compressed 1-bit image data. Use this function to process all or part of a single line of image data.

This function is available in the Document and Medical Imaging toolkits.

Parameter

Description

pRunBuffer

Pointer to the input buffer containing 1-bit compressed image data.

pBuffer

Pointer to the output buffer, which is to be filled with 1-bit image data. Use integer math to calculate the required size of this buffer as follows: bytes required = ( nWidth + 7) / 8.

nCol

Column offset within the row to be processed. The function skips this many pixels before it begins processing.

nWidth

The number of pixels to process.

Returns

> 0

The number of pixels processed.

< 1

An error occurred. Refer to Return Codes.

Comments

This function is useful for working with 1-bit images that are loaded in their compressed formats for faster loading and display. For more information, refer to Speeding Up 1-Bit Documents.

Required DLLs and Libraries

LTKRN

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 2000 / XP/Vista, Windows CE.

See Also

Functions:

L_CompressRow, L_CompressRows, L_ExpandRows, L_GetBitmapRowColCompressed, L_PutBitmapRowColCompressed, L_GetBitmapRowCompressed, L_PutBitmapRowCompressed

Topics:

Speeding Up 1-Bit Documents

Example

For an example,refer to L_PutBitmapRowColCompressed.