Bug in 7.3, can't export to TIF file

On 7/24/2015 8:35 AM, Olin Lathrop wrote:

In version 7.3 on Windows 7 64 bit, there seems to be a bug in exporting a

board to a TIF image file.  In the board editor, if I run "EXPORT IMAGE

\temp\a.tif" I always get a popup that says "Out of memory while writing

'/temp/a.tif'".  This happens regardless of resolution.  For example,

"EXPORT IMAGE \temp\a.tif 50" fails the same way, even though that would

have only required 320 x 552 pixels in my case.

 

This is a important feature to me since that's how I make assembly

drawings.  The same procedure to make the same assembly drawing worked fine

in version 5.

 

 

Hi Olin,

Here's a sample of what is produced by the fix. Let me know if this

works. Also let me know if the attachment doesn't make it.

Best Regards,

Jorge Garcia

On 7/24/2015 8:35 AM, Olin Lathrop wrote:

In version 7.3 on Windows 7 64 bit, there seems to be a bug in exporting a

board to a TIF image file.  In the board editor, if I run "EXPORT IMAGE

\temp\a.tif" I always get a popup that says "Out of memory while writing

'/temp/a.tif'".  This happens regardless of resolution.  For example,

"EXPORT IMAGE \temp\a.tif 50" fails the same way, even though that would

have only required 320 x 552 pixels in my case.

 

This is a important feature to me since that's how I make assembly

drawings.  The same procedure to make the same assembly drawing worked fine

in version 5.

 

 

Hi Olin,

Here's a sample of what is produced by the fix. Let me know if this

works. Also let me know if the attachment doesn't make it.

Best Regards,

Jorge Garcia

Jorge Garcia wrote on Wed, 01 June 2016 12:15

Here's a sample of what is produced by the fix. Let me know if this

works.

I already replied previously that this sample file works.

I can now report that version 7.7 produces usable TIF files both in

monochrome mode and not.  Thanks for fixing this.

--

Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

Jorge Garcia wrote on Wed, 01 June 2016 12:15

Here's a sample of what is produced by the fix. Let me know if this

works.

I already replied previously that this sample file works.

I can now report that version 7.7 produces usable TIF files both in

monochrome mode and not.  Thanks for fixing this.

--

Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

Jorge Garcia wrote on Wed, 01 June 2016 12:15

Here's a sample of what is produced by the fix. Let me know if this

works.

I already replied previously that this sample file works.

I can now report that version 7.7 produces usable TIF files both in

monochrome mode and not.  Thanks for fixing this.

--

Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

Jorge Garcia wrote on Wed, 01 June 2016 12:15

Here's a sample of what is produced by the fix. Let me know if this

works.

Yes, this works fine.  I enabled extra debug messages for TIFF files and

got the following:

C:\temp>image_info a.tif

TIFF image file directory 1, 12 entries:

  image_width = 1072

  image_length = 1567

  bits_per_sample = 1

  Compression: 5 (LZW)

  Photometric interpetation: 1 (black to white)

  strip_offsets = 8

  orientation = 1

  strip_byte_counts = 12021

  x_resolution = 150.00

  y_resolution = 150.00

  Planar configuration: 1 (whole pixels together)

  Resolution unit: 2 (inch)

Image file is C:\temp\a.tif.

X,Y image size = 1072,1567 pixels.  DX/DY aspect ratio = 0.684.  ALPHA,

RED,

GREEN, BLUE precision = 0,1,1,1 bits/pixel.  File type is "TIF".

Not only is this format much more standard, you will even get good

compression.  LZW on single bit pixels should do a really good job of

compressing the large background areas.  The file contains 1,679,824

pixels, but only contains a total of 97,568 bits, which comes out to 17:1

compression, and that ignores the TIFF file header that is never

compressed.  This is not to say that compression is really all that

important, but mostly to show you aren't giving up anything by doing this.

I doubt CCITT would get you that kind of compression ratio.

Thanks for getting this done.

--

Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.