Convert TIFF to bmp

[Romiks]

Hi all, I need to convert tiff file to bmp file. I found libtiff library. Maybe anybody using this library? If it possable, give me some ideas how to do that? (TIFF encoded to CMYK)

[Chris Losinger]

the easiest way to use LibTiff is with its RGBA interface: it goes something like this:

TIFF *tif = TIFFOpen(...)
UINT32 width, height;
TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &width);
TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &height);

if (TIFFRGBAImageOK(tif, msg)==0)
{
BYTE * pBuffer = new BYTE[w * h * 4];

TIFFReadRGBAImage(tif, width, height, pBuffer, 1);

... etc
}

TIFFClose(tif)

and then you will have an RGBA image from your TIFF file... but, there are plenty of libraries out there that can do all of for you.

image processing toolkits | batch image processing

[Christian Graus]

Doesn't GDI+ do this for you ?

Christian Graus - Microsoft MVP - C++ "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

[Romiks]

Many thanks :), I'll try it.

but, there are plenty of libraries out there that can do all of for you.

I need it for my cross-platform application, which uses wxWidgets library.

[Romiks]

Now I need to show TIFF, but I have another problem with scalling the image. Is it possable to scale the image by libtiff? My TIFF is width:13700; height:9300.

[JudyL_MD]

Romiks wrote:

I need it for my cross-platform application, which uses wxWidgets library

I haven't tried it, but could you use the wxImage class to open the TIFF file and then save it as a BMP file?