drawing/logo in a schematic view

For the benefit of anyone else who hits a similar issue, here's what I found after Thorsten sent me the xpm file:

The reason is that your image has too many colours in it. At the top of the code, it says (in the limitations section):

1. This only handles up to something like 62 layers
   properly. This is because the pixmap format changes to use
   more than one character per pixel, and the code rather
   dumbly assumes that there will only ever be one. To
   be fair, setting up all the layer purpose pairs would
   be a nightmare.

Your image has 256 colours. Because of this each pixel is represented by two characters, whereas my code dumbly assumes one character per pixel. So that means that each pixel is something like "UX" and it then draws two pixels for each actual pixel. Hence the problem.

What I did was to use gimp on the xpm file and then use Image->Mode->Indexed and set the maximum number of colours to 2 (under Generate Optimised palette - probably could have used the black and white mode too because you only really seemed to have 2 colours in the image), and saved the xpm file again (attached).

This then works fine.

Regards,

Andrew.

For the benefit of anyone else who hits a similar issue, here's what I found after Thorsten sent me the xpm file:

The reason is that your image has too many colours in it. At the top of the code, it says (in the limitations section):

1. This only handles up to something like 62 layers
   properly. This is because the pixmap format changes to use
   more than one character per pixel, and the code rather
   dumbly assumes that there will only ever be one. To
   be fair, setting up all the layer purpose pairs would
   be a nightmare.

Your image has 256 colours. Because of this each pixel is represented by two characters, whereas my code dumbly assumes one character per pixel. So that means that each pixel is something like "UX" and it then draws two pixels for each actual pixel. Hence the problem.

What I did was to use gimp on the xpm file and then use Image->Mode->Indexed and set the maximum number of colours to 2 (under Generate Optimised palette - probably could have used the black and white mode too because you only really seemed to have 2 colours in the image), and saved the xpm file again (attached).

This then works fine.

Regards,

Andrew.