Available in LEADTOOLS Imaging Pro, Vector, Document, and Medical Imaging toolkits. |
#include "ltwrappr.h"
virtual L_INT LBitmapBase::ConvertFromEMF(hEMF, uWidth, uHeight)
HENHMETAFILE hEMF; |
/* handle to the WMF to be converted */ |
L_UINT uWidth; |
/* width */ |
L_UINT uHeight; |
/* height */ |
Converts a Windows enhanced metafile (WMF) into a LEAD Technologies bitmap. When this function is completed, there are two copies of the drawing in memory: the EMF and the original LEAD vector. Freeing one will not affect the other.
Parameter |
Description |
hEMF |
Handle to the EMF 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 enhanced metafile can be loaded at the original dimension or scaled by using the uWidth and uHeight parameters.
If uWidth == 0 and uHeight == 0 - the enhanced metafile is loaded at the size present in the file.
If uWidth == 0 and uHeight > 0 - the enhanced metafile is stretched so that it has the height uHeight (preserving the aspect ratio).
If uWidth > 0 and uHeight == 0 - the enhanced metafile is stretched so that it has the width uWidth (preserving the aspect ratio).
If uWidth > 0 and uHeight > 0 - the enhanced 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. |
Win32, x64.
See Also
Example
This example loads a bitmap, converts it to a EMF, then converts
the EMF back to a bitmap
#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName L_INT LBitmapBase__ConvertFromEMFExample(LBitmap *pLeadBitmap) { L_INT nRet; LBitmap Bitmap; /* Bitmap handle for the initial image */ HENHMETAFILE hEMF; /* Load a bitmap, keeping its own bits per pixel */ Bitmap.Load(MAKE_IMAGE_PATH(TEXT("ImageProcessingDemo\\Image3.cmp")), 0, ORDER_BGR, NULL, NULL); /* Convert the initial bitmap to a EMF */ hEMF = Bitmap.ConvertToEMF(); /* Free the initial bitmap */ nRet =Bitmap.Free(); if(nRet !=SUCCESS) return nRet; /* Convert the EMF to create a new LEAD bitmap and preserve the size */ nRet =pLeadBitmap->ConvertFromEMF(hEMF, 0, 0); if(nRet !=SUCCESS) return nRet; /* Clean up */ DeleteEnhMetaFile(hEMF); return SUCCESS; }