wpSetBitmapData - Example Code

This example shows how the WPBitmap data class changes the contents of a bitmap file.

SOM_Scope BOOL32 bmp_wpSetBitmapData(WPImageFile *somSelf,
                                     PBYTE pBitmapData,
                                     ULONG ulSize)
{
    PBITMAPFILEHEADER      pbfh;
    BOOL                   bResult;

    /* Make sure this is really a bitmap definition  */
    pbfh = (PBITMAPFILEHEADER) pBitmapData;
    if (pbfh->usType != BFT_BITMAPARRAY &&
        pbfh->usType != BFT_BMAP)
    {
       return FALSE;
    }

    /* Free the old data buffer  */
    if(_pBitmapData)
    {
       _wpFreeMem(somSelf,_pBitmapData);
       _pBitmapData = NULL;
       _ulBitmapDataSize = 0;
    }

    /* Update the bitmap data file  */
    _pBitmapData = pBitmapData;
    _ulBitmapDataSize = ulSize;
    bResult = _wpWriteImageFile(somSelf);
    _pBitmapData = NULL;
    _ulBitmapDataSize = 0;

    /* If the file was written successfully, read the data back from the file
     * Note: This ensures that only the current resolution bitmap is
     *       kept in memory */
    if(bResult)
    {
       bResult = _wpReadImageFile(somSelf);
    }

    return bResult;
}