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L_WriteFileTransforms

Summary

Writes transforms to a FlashPix file.

Syntax

#include "l_bitmap.h"

L_LTFIL_API L_INT L_WriteFileTransforms(pszFile, pTransforms, nFlags, pSaveOptions)

Parameters

L_TCHAR* pszFile

Character string containing the FlashPix file name.

pFILETRANSFORMS pTransforms

Pointer to a transform structure.

L_INT nFlags

Flag used to determine how the image will be viewed. If nFlags is set, L_WriteFileTransforms will translate and/or scale the image so that the image will fall entirely within the view frame. These transformations will be incorporated into the affine matrix stored with the image. For example, if an image is rotated, as seen below, part of the image now falls outside the view frame. In this case, if nFlag is set, the image will be translated and scaled by L_WriteFileTransforms so that the entire image falls within the view frame. The translation and scaling are incorporated into the matrix stored with the image.

If nFlags is not set, the image would be appear as it does on the right, with part of the image "missing":

For an example, click here

pSAVEFILEOPTION pSaveOptions

Pointer to optional extended save options. Pass NULL to use the default save options.

Returns

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

Comments

Note: Page number is specified in the SAVEFILEOPTION structure.

Also determines whether the image will be viewed "as is" when rotated, sheared or skewed, or whether the image will be translated and scaled such that the entire image may be viewed in its sheared, skewed or rotated state.

To load a FlashPix file with or without the transforms, see FlashPix Transforms Options.

For more information on transforms in general, refer to FILETRANSFORMS.

Required DLLs and Libraries

LTFIL
File format DLLs
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, Linux.

Example

L_INT WriteFileTransformsExample(L_VOID) 
{ 
   L_INT nRet; 
   FILETRANSFORMS FileTransforms; 
 
   nRet = L_ReadFileTransforms (MAKE_IMAGE_PATH("IMAGE1.FPX"), &FileTransforms, NULL); 
   if(nRet != SUCCESS) 
      return nRet; 
 
   //Increase the contrast by 20% 
   FileTransforms.fContrastAdjustment = FileTransforms.fContrastAdjustment * 1.2f; 
   nRet = L_WriteFileTransforms(MAKE_IMAGE_PATH("IMAGE1.FPX"),&FileTransforms, FALSE, NULL); 
   if(nRet != SUCCESS) 
      return nRet; 
   return SUCCESS; 
}