LBitmapBase::ConvertFromWMF
#include "ltwrappr.h"
virtual L_INT LBitmapBase::ConvertFromWMF(hWMF, uWidth, uHeight)
HMETAFILE hWMF; |
/* handle to the WMF to be converted */ |
L_UINT uWidth; |
/* width */ |
L_UINT uHeight; |
/* height */ |
Converts a Windows metafile (WMF) into a LEAD Technologies bitmap. When this function is completed, there are two copies of the drawing in memory: the WMF and the original LEAD vector. Freeing one will not affect the other.
Parameter |
Description |
hWMF |
Handle to the WMF to be converted. |
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
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
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. |
See Also
Functions: |
Class Members, LChange::ChangeFromEMF, LChange::ChangeFromWMF, |
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Topics: |
Raster Image
Functions: Input and Output |
Example
This example loads a bitmap, converts it to a WMF, then converts the WMF back to a bitmap
L_INT LBitmapBase__ConvertFromWMFExample(HWND hWnd, LBitmap* pLeadBitmap) { UNREFERENCED_PARAMETER(hWnd); L_INT nRet; LBitmap Bitmap; /* Bitmap handle for the initial image */ HMETAFILE hWmf; /* Load a bitmap, keeping its own bits per pixel */ nRet =Bitmap.Load(TEXT("C:\\Program Files\\LEAD Technologies, Inc\\LEADTOOLS 15.0\\Images\\image3.cmp"), 0, ORDER_BGR, NULL, NULL); if(nRet !=SUCCESS) return nRet; /* Convert the initial bitmap to a WMF */ hWmf = Bitmap.ConvertToWMF( ); /* Free the initial bitmap */ nRet =Bitmap.Free(); if(nRet !=SUCCESS) return nRet; /* Convert the WMF to create a new LEAD bitmap and preserve the size */ nRet =pLeadBitmap->ConvertFromWMF(hWmf, 0, 0); if(nRet !=SUCCESS) return nRet; /* Clean up */ DeleteMetaFile(hWmf); return SUCCESS; }