Missing -page a4 and pdf is larger than png files combined

[jurij]

I played around with some settings and this command fits my needs:

> ls -lsa *.png
168 -rw-r--r--@ 1 jurij  staff    80K Apr  9 01:23 file-0.png
224 -rw-r--r--  1 jurij  staff   111K Apr  9 01:23 file-1.png

> convert *.png -page a4 -compress fax -type bilevel page-a4.pdf
> du -sh page-a4.pdf
196K	page-a4.pdf
> identify page-a4.pdf
page-a4.pdf[0] PDF 612x828 612x828+0+0 16-bit sRGB 2590B 0.000u 0:00.000
page-a4.pdf[1] PDF 612x828 612x828+0+0 16-bit sRGB 2616B 0.000u 0:00.000

i could not reproduce the same result with resize/extent and looks like -page a4 is not supported?

byte[] png = null;
var image = new MagickImage(png);

image.ColorType = ColorType.Bilevel;
image.Settings.Compression = CompressionMethod.Fax;
image.Page.Greater = true;
image.Page.FillArea = true;

image.Resize(595 * 2, 842 * 2);
image.Extent(595 * 2, 842 * 2, Gravity.Center, MagickColors.White);
image.Density = new Density(72 * 2, DensityUnit.Undefined);

result:

> du -sh resize-extent.pdf
480K	resize-extent.pdf
> identify resize-extent.pdf
resize-extent.pdf[0] PDF 612x828 612x828+0+0 16-bit sRGB 2684B 0.000u 0:00.000
resize-extent.pdf[1] PDF 612x828 612x828+0+0 16-bit sRGB 2797B 0.000u 0:00.000

Is there any way to reproduce -page a4 with existing implementation?

[dlemstra]

You will need to set image.ColorType = ColorType.Bilevel; after you resize the image. The Resize method will probably introduce new pixels making the image no longer BiLevel. And in the next version you will be able to do this:

image.Page = MagickGeometry.FromPageSize("a4");

p.s. You cannot modify the properties of the image.Page, This property will keep returning a new instance.