delphi - How can I convert PNG to GIF keeping the transparency? -

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how can convert png gif keeping transparency?

i have hoped using assign( ) method work doesn't seem migrate transparency. in gif, it's represented black.

    png:=tpngimage.create;     try       png.loadfromfile(sfile);       // comes file:  png.transparencymode;       // comes file:  png.transparent        // didn't help:  gif.transparent:=true;        gif.assign(png);        // didn't help:  gif.transparent:=true;        gif.savetofile('e:\tmp\out.gif');           png.free;     end;

i haven't found way handle in delphi...

thanks!

it possible transfer image png gif. however, don't recommend so. gif format substantially less capable png. png supports rgba color channels , partial transparency. gif uses 256 color palette , no support partial transparency.

there many libraries available make best of bad job , attempt produce gif image close png image, information lost.

the gif format dates late 1980s , time has moved on. has long since served purpose. png modern, capable , supported. if possible should switch gif using png.


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