L_ChangeFromWMF

#include "l_bitmap.h"

L_LTDIS_API L_INT L_ChangeFromWMF(pBitmap, uStructSize, hWmf, uWidth, uHeight)

pBITMAPHANDLE pBitmap;	/* pointer to a bitmap */
L_UINT uStructSize;	/* size in bytes, of the structure pointed to by pBitmap */
L_HMETAFILE hWmf;	/* handle to the WMF to be converted */
L_UINT uWidth;	/* width */
L_UINT uHeight;	/* height */

Changes a Windows metafile (WMF) into a LEAD Technologies bitmap and, if successful, frees the metafile.

Parameter	Description
pBitmap	Pointer to the bitmap to be updated with the changed file.
uStructSize	Size in bytes, of the structure pointed to by pBitmap, for versioning. Use sizeof(BITMAPHANDLE).
hWmf	Handle to the WMF to be changed.
uWidth	Amount by which to scale the metafiles original width.
uHeight	Amount by which to scale the metafiles original height.

Returns

SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

This function does not support signed data images. It returns the error code ERROR_SIGNED_DATA_NOT_SUPPORTED if a signed data image is passed to this function.

If this function is successful, hWmf is freed.

The metafile can be loaded at the original dimension or scaled by using the uWidth and uHeight parameters.

If uWidth == 0 and uHeight == 0 - the metafile is loaded at the size present in the file

If uWidth == 0 and uHeight > 0 - the metafile is stretched so that it has the height uHeight (preserving the aspect ratio)

If uWidth > 0 and uHeight == 0 - the metafile is stretched so that it has the width uWidth (preserving the aspect ratio)

If uWidth > 0 and uHeight > 0 - the metafile is stretched so that it has the width uWidth and height uHeight (the aspect ratio is ignored)

Required DLLs and Libraries

LTDIS

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.

See Also

Functions:	L_ChangeToEMF, L_ChangeFromEMF,
	L_ChangeToWMF, L_ConvertFromEMF,
	L_ConvertFromWMF, L_ConvertToWMF,
	L_ConvertToEMF

Example

This example loads a bitmap, converts it to a WMF, then converts the WMF back to a bitmap Note that in this example, we didn't have to free the bitmap and the metafile, like we did in ChangeWMFToLead

 L_INT ChangeFromWMFExample()
{
   L_INT nRet;
   BITMAPHANDLE   LeadBitmap;    /* Bitmap handle for the initial image */
   HMETAFILE      hWmf;

   /* Load a bitmap, keeping its own bits per pixel */
   nRet = L_LoadBitmap (MAKE_IMAGE_PATH(TEXT("ImageProcessingDemo\\Image3.cmp")), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL);
   if(nRet != SUCCESS)
      return nRet;

   /* Convert the initial bitmap to a WMF */
   hWmf = L_ChangeToWMF( &LeadBitmap);

   /* Convert the WMF to create a new LEAD bitmap and preserve the size */
   nRet = L_ChangeFromWMF(&LeadBitmap, sizeof(BITMAPHANDLE), hWmf, 0, 0);
   if(nRet != SUCCESS)
      return nRet;

   nRet = L_SaveBitmap(MAKE_IMAGE_PATH(TEXT("Result.BMP")), &LeadBitmap, FILE_BMP, 24, 0, NULL);
   if(nRet != SUCCESS)
      return nRet;
   if(LeadBitmap.Flags.Allocated)
      L_FreeBitmap(&LeadBitmap);
   return SUCCESS;
}