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Batch .png trim and output offsets?

BlitzMax Forums/BlitzMax Programming/Batch .png trim and output offsets?

Grey Alien(Posted 2016) [#1]
Hi all, does anyone have an app (or BlitzMax code) that will batch trim png files of transparent space (ideally with a 1 pixel border to avoid weirdness) and that outputs all the drawing offsets in a text file? That would be super useful.

I already have Texture Packer Pro and I wonder if it can do that via command line but I haven't figured it out yet. I don't actually want to make a big texture, just trim a whole load of pngs.

Thanks!


Derron(Posted 2016) [#2]
With linux you could do:

convert img.png -trim -identify +repage img.trimmed.png

Output:
img.png PNG 800x600=>600x500 800x600+100+50 8-bit DirectClass 0.000u 0:00.004

(so it includes the offset).




Next to this I just prepared a simple trimmer for you.
It utilizes some files of my "Dig"-framework, so just download the framework and open "samples/imagehelper/imagehelper.trimimage.bmx"

Framework: https://www.github.com/GWRon/Dig.git


Sample output (you could adjust to your needs):

$ ./imagehelper.trimimage gfx
Input dir: "gfx"
Output dir: "gfx/trimmed"
Processing [10 files]
- processing: "gfx/datasheet_general.png"
  - trimmed: 512,256 -> 364,250 (offset: 0,0 / 363,249)
  - saved as "gfx/trimmed/datasheet_general.png".
- processing: "gfx/dialogue.png"
  - trimmed: 256,128 -> 248,120 (offset: 0,0 / 247,119)
  - saved as "gfx/trimmed/dialogue.png".
- processing: "gfx/errorbox.png"
  - trimmed: 295,190 -> 293,186 (offset: 2,3 / 294,188)
  - saved as "gfx/trimmed/errorbox.png".
- processing: "gfx/figuregenerator.png"
  - trimmed: 512,500 -> 504,462 (offset: 0,0 / 503,461)
  - saved as "gfx/trimmed/figuregenerator.png".
- processing: "gfx/logo.png"
  - trimmed: 512,256 -> 497,242 (offset: 5,4 / 501,245)
  - saved as "gfx/trimmed/logo.png".
- processing: "gfx/logo_small.png"
  - trimmed: 128,64 -> 123,60 (offset: 2,1 / 124,60)
  - saved as "gfx/trimmed/logo_small.png".
- processing: "gfx/screen_menu.png"
  - trimmed: 800,600 -> 800,600 (offset: 0,0 / 799,599)
  - saved as "gfx/trimmed/screen_menu.png".
[...]



bye
Ron


Gabriel(Posted 2016) [#3]
If Texture Packer Pro doesn't have the ability to batch multiple images without combining them into a texture, couldn't you write a BlitzMax program which would produce a batch file to run TPP on a single image over and over again?


Grey Alien(Posted 2016) [#4]
@Derron, great thanks for that!!

@Gabriel only problem is it wouldn't have all the output data (offsets etc) in the same file, I'd end up with lots of files.


Derron(Posted 2016) [#5]
@multiple output files ...

Load all in and write content to a single file. Think you are experienced enough to achieve this ;-)


Bye
Ron