[bug-gs] psmono device renders too little.

[Fruhwirth Clemens]

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Hi!

psmono and it's buddies render too little postscript images in the lower
left corner.

gs -sPAPERSIZE=a4 -sDEVICE=psmono -sOutputFile=output.ps input.ps

Setting the resolution to 72dpi resizes the whole image, which should not
happend imho. The postscript procedure in the output file responsible for
decoding the image is '.ImageRead'. It takes 5 args from the stack, that
include 'xres' 'yres'. Replacing "300 300" with "72 72" fixes the problem.

You can have a look at my input.ps, my original psmono output output.ps
and my edited output1.ps at

http://therapy.endorphin.org/gs-bug/input.ps
http://therapy.endorphin.org/gs-bug/output.ps
http://therapy.endorphin.org/gs-bug/output1.ps

It looks like the width/heigth, xres/yres computation is flawed.
The relevant source part is gs-7.05/src/gdevpsim.c:182
Forcing xres, yres to 72 seems to work for all resolutions, because the width
and heigth parameters are adjusted instead, but I doubt that is the correct
solution, however patch is attached, version: GNU Ghostscript 7.05

Regards, Clemens

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--- gs/ghostscript-7.05/src/gdevpsim.c	Fri Feb 22 20:45:56 2002
+++ gs-7.05/src/gdevpsim.c	Thu Nov  7 21:02:26 2002
@@ -180,8 +180,7 @@
=20
     /* Write the .ImageRead command. */
     fprintf(prn_stream,
-	    "%g %g %d %d %d .ImageRead\n",
-	    pdev->HWResolution[0], pdev->HWResolution[1],
+	    "72 72 %d %d %d .ImageRead\n",
 	    pdev->width, pdev->height, pdev->color_info.depth);
=20
     /* Compress each scan line in turn. */

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