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.

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

Win32, x64, Linux.

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