LEADTOOLS Raster Imaging C DLL Help
| LEADTOOLS Raster Imaging C DLL Help > Function References > L_ExpandRows |
#include "l_bitmap.h"
L_LTKRN_API L_INT L_ExpandRows(pRun, pBuffer, nWidth, nRows)
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L_UINT16* pRun; |
/* pointer to the input buffer */ |
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L_UCHAR* pBuffer; |
/* pointer to the output buffer */ |
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L_UINT nWidth; |
/* number of pixels in each row */ |
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L_UINT nRows; |
/* number of rows */ |
Does buffer-to-buffer decompression of RLE-compressed 1-bit image data. Use this function to process multiple lines of image data.
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Parameter |
Description |
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pRun |
Pointer to the input buffer containing 1-bit compressed image data. |
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pBuffer |
Pointer to the output buffer, which is to be filled with 1-bit image data. The size of each row must be rounded up to a multiple of 4 bytes. Use integer math to calculate the required size of this buffer as follows: bytes required = (((nWidth + 31) &~31)/ 8) * nRows. |
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nWidth |
The number of pixels in each row. |
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nRows |
The number of rows to process. |
Returns
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> 0 |
The number of pixels processed. |
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< 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
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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.
See Also
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Functions: |
L_CompressRow, L_ExpandRow, L_CompressRows, L_GetBitmapRowColCompressed, L_PutBitmapRowColCompressed, L_GetBitmapRowCompressed, L_PutBitmapRowCompressed |
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Topics: |
Example
For an example,refer to L_GetBitmapRowCompressed.
