[bug-pcl] PCL image generation - Blank lines "skipped" !

[Garnier, Antoine]

Hello, 

 

It seems that GhostPCL is skipping < blank lines > during a conversion
from PCL to PCL.

 

Here is my context: I have a color PCL image, and need to convert it as
greyscale.

In order to process this conversion, I'm using the "pcl6.exe" executable
(I'm working on a Windows Platform, and compile the 1.41 version of
GhostPCL).

 

Here is my command line: 

 

pcl6 -PPCL5C -sDEVICE=ljet4 -sPAPERSIZE=A4 -dFIXEDMEDIA
-sOutputFile=GREY_OUTPUT.pcl -r300 -dQUIET -dNOPAUSE INPUT.pcl

 

The input image is a logo, which is surrounded by white pixels.

When I convert the input PCL file, the "blank lines" at the top of the
image seem to be "skipped" by GhostPCL !

GhostPCL seems to delete the "blank" data, and introduces a "Relative
vertical move" command in the output PCL file !

 

For example: 

If the "original" image has '45' lines of white pixels before non-white
data, GhostPCL skips the blanks and adds this instruction: [ ESC * p
+233 Y ] - Relative vertical move : 233 dots

 

My questions are: 

 

-          How to keep "white" data in the output file and avoid
GhostPCL to add "relative vertical moves" ?

-          If not possible: how does GhostPCL "counts" the white lines ?
(on my example : how does it determines a vertical move of '233' ?)

-          Does someone know another way to convert PCL files to
greyscale ?

 

 

Thanks in advance.

 

 

 

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