[Closed] Gamma issues when open/resize/save a image [c++]

As starting point just say that it only happens if gamma correction is enabled on preferences, I tried to disable it programatically but wihtout luck:

      bool gammaenabled = gammaMgr.IsEnabled();
	float fileingamma = gammaMgr.GetFileInGamma();
	float fileoutgamma = gammaMgr.GetFileOutGamma();
	gammaMgr.SetFileInGamma(1.0f);
	gammaMgr.SetFileOutGamma(1.0f);
	gammaMgr.Enable(false);
	gammaMgr.enable = false;

Being this kind of ‘features’ more or less common on 3dsmax I tried to change the gamma by myself using custom gamma:

	BitmapInfo bi_input = BitmapInfo(myfile);
	bi_input.SetCustomFlag(BMM_CUSTOM_FILEGAMMA);
	bi_input.SetCustomGamma(1.0f);
	BMMRES status;
	Bitmap *bm = TheManager->Load(&bi_input, &status);

Of course I tried on output file too but without luck.

The intention is just to resize an image and save the resized copy I left the code here just for anyone that could considere this useful:

	BitmapInfo bi(bi_input);
	bi.SetType(BMM_TRUE_32);
	bi.SetWidth(newWidth);
	bi.SetHeight(newHeight);
	bi.SetPath(outputfile);

	Bitmap *outbm = TheManager->Create(&bi);
	BMM_Color_fl fc;
	outbm->CopyImage(bm, COPY_IMAGE_RESIZE_HI_QUALITY, fc, &bi); 
	outbm->OpenOutput(&bi);
	outbm->Write(&bi);
	outbm->Close(&bi);

Any idea?