Reads a thumbnail image stored in a file and loads it into a specified bitmap.
#include "l_bitmap.h"
L_LTFIL_API L_INT L_ReadFileStamp(pszFile, pBitmap, uStructSize, pLoadOptions)
Character string containing the file name.
Pointer to the bitmap handle referencing the bitmap that will contain the thumbnail image.
Size in bytes, of the structure pointed to by pBitmap
, for versioning. Use sizeof(BITMAPHANDLE).
Pointer to optional extended load options. Pass NULL to use the default load options.
Value | Meaning |
---|---|
SUCCESS | The function was successful. |
< 1 | An error occurred. Refer to Return Codes. |
Only EXIF, CMP, JPEG, FlashPix, HEIF/HEIC and PNG formats support stamps. However, not all files of these formats contain stamps.
At this time, the only multipage format that supports stamps is HEIF/HEIC.
If you know the file format of the file, you can achieve better performance by calling L_ReadFileStamp2.
Win32, x64, Linux.
Reads a thumbnail image stored in a FlashPix file and loads it into a specified bitmap.
Then saves the thumbnail image into bmp image.
L_INT ReadFileStampExample(L_VOID)
{
L_INT nRet;
BITMAPHANDLE StampBitmap;
nRet = L_ReadFileStamp(MAKE_IMAGE_PATH("STAMP.CMP"),
&StampBitmap, sizeof(BITMAPHANDLE), NULL);
if(nRet != SUCCESS)
return nRet;
nRet = L_SaveBitmap(MAKE_IMAGE_PATH("Thumbnail.BMP"),
&StampBitmap, FILE_BMP, 24, 0, NULL);
if(StampBitmap.Flags.Allocated)
L_FreeBitmap(&StampBitmap);
return nRet;
}
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