L_ExpandRow

#include "l_bitmap.h"

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

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.

Parameters

L_UINT16* pRunBuffer

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

L_UCHAR* 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.

L_UINT nCol

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

L_INT nWidth

The number of pixels to process.

Returns

Value	Meaning
> 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.