Create Progressive JPEG.

[yoshida-mediba]

This change was necessary to output progressive JPEG.

img:set_interlace_scheme('PlaneInterlace')

--

MagickSetInterlaceScheme()
https://www.imagemagick.org/api/MagickWand/magick-property_8c.html#afc32d088dd27e03d23a8e0978bfcdc0f
https://www.imagemagick.org/api/MagickWand/magick-property_8c_source.html#l02413

MagickSetImageInterlaceScheme()
https://www.imagemagick.org/api/MagickWand/magick-image_8c.html#a8bc8d432c89016f346a1c047d426be75
https://www.imagemagick.org/api/MagickWand/magick-image_8c_source.html#l09982

[kir0w]

When can we expect merge?)

[leafo]

What's the difference between MagickGetImageInterlaceScheme and MagickGetInterlaceScheme.. We already have a way to set the interlace scheme, does this change how it works?

[Jijun]

What's the difference between MagickGetImageInterlaceScheme and MagickGetInterlaceScheme.. We already have a way to set the interlace scheme, does this change how it works?

as i test, MagickSetImageInterlaceScheme take no effect on interlace , but MagickSetInterlaceScheme can set interlace successful, i use
identify -verbose gogopher-1.jpg|grep Interlace

so i see in the ImageMagick source code the difference is :

WandExport MagickBooleanType MagickSetInterlaceScheme(MagickWand *wand,
const InterlaceType interlace_scheme)
{
wand->image_info->interlace=interlace_scheme;
}

WandExport MagickBooleanType MagickSetImageInterlaceScheme(MagickWand *wand,
const InterlaceType interlace)
{
wand->images->interlace=interlace;
}