| T O P I C R E V I E W |
| guillem |
Posted - Jun 09 2014 : 05:13:33
Is it possible to save a Tiff image with TRANSPARENT background and with CMYK colorspace?
that's my code:
Img1.IO.Params.TIFF_PhotometInterpret := ioTIFF_CMYK;
and
Img1.IO.Params.TIFF_PhotometInterpret := ioTIFF_TRANSPMASK;
Is there something like:
Img1.IO.Params.TIFF_PhotometInterpret := ioTIFF_TRANSPMASK or ioTIFF_CMYK; |
| 3 L A T E S T R E P L I E S (Newest First) |
| guillem |
Posted - Jun 10 2014 : 06:23:53
Hello all,
Here is another unsuccessful aproach.
The code below generates two output files (a tiff and a png file).
The PNG file it is transparent with the content I desire.
The TIFF file contains the contents I desire with cmyk format but it is not transparent.
One again if I use:
Img1.IO.Params.TIFF_PhotometInterpret := ioTIFF_TRANSPMASK;
It generates the TIF file transparent but with not cmyk format.
It is really possible to generate cmyk TIF files with a transparent background?
Can anyone help?
Thank you very much
Guillem.
// SOURCE CODE
Img1.IO.Params.TIFF_Compression := ioTIFF_LZW;
Img1.IO.Params.TIFF_PhotometInterpret := ioTIFF_CMYK;
Img1.IEBitmap.PixelFormat := ieCMYK;
Img1.EnableAlphaChannel := true;
Img1.IEBitmap.Width := w;
Img1.IEBitmap.Height := h;
Img1.AlphaChannel.Fill(0);
Img1.LayersAdd;
Img1.Layers[0].PosX := 0;
Img1.Layers[1].PosY := 0;
Img1.Layers[1].Width := w div 2;
Img1.Layers[1].Height := h div 2;
Img2.SelectionBase := iesbBitmap;
Img2.SelectEllipse(x,y,w,h, iespReplace);
Img2.IEBitmap.CopyWithMask1(Img1.Layers[1].bitmap, Img2.SelectionMask);
Img1.DeSelect;
Img1.LayersFixRotations(1);
Img1.Layers[1].Locked := true;
Img1.LayersMerge(0,1,true);
Img1.Fit;
Img1.Refresh;
Img1.IO.Update;
Img1.IO.SaveToFileTIFF(sTif_filename);
Img1.IO.SaveToFilePNG(sPNG_filename);
|
| guillem |
Posted - Jun 10 2014 : 02:56:18
Hi Nigel,
Thanks for your fast response.
I have been doing some tests and I cannot generate a tif file with cmyk colors and transparent background.
I am loading a tif file into img2 and then I copy a selected part of img2 into img1. what i want to achive is to save a new tif file (img1) with a transparent background and a part of img2 content with cmyk colors. What i get now with this code is exactly what i need except the transparent background.
You can see I do loads of unnecessary things with the alphachannel property, but I do that to try to get part of the tif file transparent.
If you or anyone can help with that I will really apreciate it. Or can you provide a really simple sample code of a transparent tif file with cmyk colors?
Thanks in advance.
What am i doing wrong?
Here is my code:
Img2.IO.Params.TIFF_PhotometInterpret := ioTIFF_CMYK;
Img2.IO.LoadFromFileTIFF(sFilename);
Img2.IO.Update;
w := Img2.IO.Params.Width;
h := Img2.IO.Params.Height;
x := w div 2;
y := h div 2;
Img1.IO.Params.TIFF_Compression := ioTIFF_LZW;
Img1.IO.Params.TIFF_ImageDescription := Extractfilepath(sTiff);
Img1.IO.Params.TIFF_PhotometInterpret := ioTIFF_CMYK;
Img1.EnableAlphaChannel := true;
Img1.IEBitmap.Width := w;
Img1.IEBitmap.Height := h;
Img1.AlphaChannel.Fill(0);
Img1.AlphaChannel.Canvas.Pen.Color := clBlack;
Img1.AlphaChannel.Canvas.Brush.Color := clBlack;
Img1.AlphaChannel.Canvas.FillRect(myRect);
Img1.AlphaChannel.Canvas.Pen.Color := clwhite;
Img1.AlphaChannel.Canvas.Brush.Color := clwhite;
Img1.AlphaChannel.Canvas.Ellipse(200,200,700, 700);
Img1.Select(200,200,600,600);
Img1.SetSelectedAreaAlpha(140);
Img2.SelectionBase := iesbBitmap;
Img2.SelectEllipse(x,y,w,h, iespReplace);
Img2.IEBitmap.CopyWithMask1(Img1.IEBitmap, Img2.SelectionMask);
Img1.SelectEllipse(x,y,w,h, iespReplace);
Img1.SetSelectedAreaAlpha(100);
Img1.Select(200,200,600,600);
Img1.SetSelectedAreaAlpha(50);
Img1.IO.Update;
Img1.IO.SaveToFileTIFF(sFilename1);
|
| xequte |
Posted - Jun 09 2014 : 14:23:10
Hi
TIFF_PhotometInterpret simply exposes the PhotometricInterpretation tag of the TIFF standard:
http://www.fileformat.info/format/tiff/corion.htm
http://www.awaresystems.be/imaging/tiff/tifftags/photometricinterpretation.html
So only one value can be specified.
However if you want to have transparent background on a TIFF that is possible even if TIFF_PhotometInterpret = ioTIFF_CMYK. You must add an Alpha channel to your image. Please see the Alpha Channel section of TImageEnView:
http://www.imageen.com/help/TImageEnView.html
Nigel
Xequte Software
www.xequte.com
nigel@xequte.com |
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