How to implement the following code using MagickCore?

[sunng1]

hi everyone:

I'm working for reducing the file size of GIF Image, and I found the following command line code :

Code: Select all

  convert speed.gif \
          \( -clone 0--1 -background none +append \
              -quantize transparent  -colors 63  -unique-colors \
             -write mpr:cmap    +delete \) \
          -map mpr:cmap      speed_cmap.gif

It force image to use one global colormap, so make GIF smaller,

My question is : how to implement this using MagickCore? or It's impossible?

thanks!!!

[magick]

To translate a command line to the MagickCore API have a look at MogrifyImage() and MogrifyImageInfo() of the wand/mogrify.c source module. Each command line option calls MagickCore API methods from these modules. For example, -map is:

Code: Select all

        if (LocaleCompare("map",option+1) == 0)
          {
            Image
              *remap_image;

            ImageInfo
              *remap_info;

            /*
              Transform image colors to match this set of colors.
            */
            (void) SyncImageSettings(image_info,*image);
            if (*option == '+')
              break;
            remap_info=CloneImageInfo(image_info);
            (void) CopyMagickString(remap_info->filename,argv[i+1],
              MaxTextExtent);
            remap_image=ReadImage(remap_info,exception);
            remap_info=DestroyImageInfo(remap_info);
            CatchException(exception);
            if (remap_image == (Image *) NULL)
              break;
            (void) RemapImage(quantize_info,*image,remap_image);
            InheritException(exception,&(*image)->exception);
            remap_image=DestroyImage(remap_image);
            break;
          }

[sunng1]

thank you very much, so I can learn more detail about command line!

thanks

[anthony]

You can declare separate image structures, which you can't do from command lines, and this will let you replace the need for parenthesis.

That is you can clone a image into a separate Image list, for working, making it a lot easier.

The Library itself is a great guide on how to do things

Of course getting an initial program structure is something I find trickier. An example should be around somewhere however.