Available in LEADTOOLS Imaging Pro, Vector, Document, and Medical Imaging toolkits. |
#include "ltwrappr.h"
static L_INT LChange::ChangeFromEMF(pLBitmap, uStructSize, hEmf, uWidth, uHeight)
LBitmapBase * pLBitmap; |
/* pointer to a bitmap object */ |
L_UINT uStructSize; |
/* size in bytes, of the structure pointed to by pLBitmap */ |
HENHMETAFILE hEmf; |
/* handle to the EMF to be changed */ |
L_UINT uWidth; |
/* width */ |
L_UINT uHeight; |
/* height */ |
Changes a Windows enhanced metafile (EMF) into a LEAD Technologies bitmap and, if successful, frees the enhanced metafile.
Parameter |
Description |
pLBitmap |
Pointer to the bitmap object to be updated with the changed file. |
uStructSize |
Size in bytes, of the structure pointed to by pLBitmap. Use sizeof(BITMAPHANDLE). |
hEmf |
Handle to the EMF to be changed. |
uWidth |
Amount by which to scale the enhanced metafiles original width. |
uHeight |
Amount by which to scale the enhanced metafiles original height. |
Returns
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Comments
If this function is successful, hEmf is freed.
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. |
Platforms
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 LChange__ChangeFromEMFExample(LBitmap * pLeadBitmap) { L_INT nRet; LBitmap Bitmap ; /* Bitmap handle for the initial image */ HENHMETAFILE hEMF; /* Load a bitmap, keeping its own bits per pixel */ nRet = Bitmap.Load(MAKE_IMAGE_PATH(TEXT("ImageProcessingDemo\\Image3.cmp")), 0, ORDER_BGR, NULL, NULL); if(nRet != SUCCESS) return nRet; /* Convert the initial bitmap to a EMF */ hEMF = LChange::ChangeToEMF( &Bitmap ); /* Convert the EMF to create a new LEAD bitmap and preserve the size */ nRet = LChange::ChangeFromEMF(pLeadBitmap, sizeof(BITMAPHANDLE), hEMF, 0, 0); if(nRet != SUCCESS) return nRet; return SUCCESS; }