CODEWITHSUNDEEP
imagemagick
HungryDB
HungryDB

Reputation: 575

Overlaying and repeating image with blank image in imagemagick's new version

I am trying to overlay 100X100 image on blank 1080X1320 image by repetition.

    $ThumbImg = 'thumb_100x100.png';
    $new_image = "new.png";

    exec("convert -size 1080x1320! xc:transparent all_images/" . $new_image);

   $new_image_path = 'all_images/' . $new_image;

     // main image  width=1080 ,height = 1320,
     // thumb image width = 100 , height = 100,
     // row=1320/100=14
     // col=1080/100=11

    for ($row = 0; $row < 14; $row++)
    {
       for ($col = 0; $col < 11; $col++)
       {
         exec('composite -geometry +' . ($col * 100) . '+' . ($row * 100) . ' ' . $ThumbImg . ' ' . $new_image_path . ' ' . $new_image_path);

       }
    }

When i use above code on version 6.9 it works fine and 100x100 image gets repeated uniformly over blank 1080x1320 image. But this doesn't work on 7.0.3 version (latest IM version).

what change would be needed in exec command to make this work on newer version?

UPDATE -

Solution suggested by mark-setchell is working for some patterns but for following it doesn't create an image but instead only blank image is created.

Lining pattern image

UPDATE -

We need to use -set colorspace RGB in command to get the right result. So command would be 

exec('convert new.png -fill thumb.png -set colorspace RGB -draw "color 0,0 reset" result.png');

Upvotes: 0

Views: 354

Answers (1)

Mark Setchell
Mark Setchell

Reputation: 208052

I think it would be simpler to just use ImageMagick's -fill operator to tile your 100x100 image over a background.

So, if we create a 100x100 tile to repeat like this:

convert -size 100x100 gradient:cyan-magenta tile.png

enter image description here

Then you can tile that all over a 1080x1320 background like this:

convert xc:black"[1080x1320]"  -fill tile.png -draw "color 0,0 reset" result.png

enter image description here

If you want to generate the tile pattern "on-the-fly" in one command, you can do it like this using an MPR (Magick Pixel Register) in memory to hold the fill:

convert -size 100x100 gradient:cyan-magenta -write MPR:tile +delete \
   xc:black"[1080x1320]" -fill MPR:tile -draw "color 0,0 reset" result.png

If you wish to continue to use the original composite command, you need to re-order the parameters as follows with IM v7:

composite new.png -geometry +400+900 tile.png result.png

Upvotes: 1

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