Difference: LuratechDiffs (1 vs. 19)

Revision 192020-02-10 - JulianSmith

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META TOPICPARENT name="JulianSmith"
CDX3C1DC_Writer.pdf---+ Comparing gs normal/Luratech builds.
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Performance info

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2020-2-10: Performance info from db24ea35 (Tue Feb 4 11:10:41 2020 +0000):

 Graph showing improvements in performance for selected files from Robin's commits on 2020-1-27:

* https://ghostscript.com/~julian/luratech-performance-18-19-graph.html

Revision 182020-01-28 - JulianSmith

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META TOPICPARENT name="JulianSmith"
CDX3C1DC_Writer.pdf---+ Comparing gs normal/Luratech builds.
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Performance info

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Improvements in performance for selected files from Robin 2020-1-27:
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Graph showing improvements in performance for selected files from Robin's commits on 2020-1-27:
 
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* Graph showing memory and time ratios
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* https://ghostscript.com/~julian/luratech-performance-18-19-graph.html
 
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Performance from build shortly after 77b7cce9253863ac4: 2020-01-23 12:10:40: jbig2dec/jbig2_mmr.c: optimised jbig2_find_changing_element().
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Performance from build shortly after 77b7cce9253863ac4: 2020-01-23 12:10:40: jbig2dec/jbig2_mmr.c: optimised jbig2_find_changing_element():
 
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Original performance data from 2020-1-9:
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Performance data from 2020-1-9:
 
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[Note that this was gathered in a different way from the above, so speed and memory values are not directly comparable.]

 

Diffs in output

Revision 172020-01-27 - JulianSmith

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META TOPICPARENT name="JulianSmith"
CDX3C1DC_Writer.pdf---+ Comparing gs normal/Luratech builds.
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  Improvements in performance for selected files from Robin 2020-1-27:
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* Graph showing memory and time ratios
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* Graph showing memory and time ratios
  Performance from build shortly after 77b7cce9253863ac4: 2020-01-23 12:10:40: jbig2dec/jbig2_mmr.c: optimised jbig2_find_changing_element().

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Original performance from 2020 Jan 9:
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Original performance data from 2020-1-9:
 
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Diffs in output

Revision 162020-01-27 - JulianSmith

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META TOPICPARENT name="JulianSmith"
CDX3C1DC_Writer.pdf---+ Comparing gs normal/Luratech builds.
Line: 13 to 13
 

Performance info

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Improvements in performance for selected files from Robin 2020-1-27:

* Graph showing memory and time ratios

Performance from build shortly after 77b7cce9253863ac4: 2020-01-23 12:10:40: jbig2dec/jbig2_mmr.c: optimised jbig2_find_changing_element().

Original performance from 2020 Jan 9:

 

Diffs in output

Revision 152020-01-20 - JulianSmith

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META TOPICPARENT name="JulianSmith"
CDX3C1DC_Writer.pdf---+ Comparing gs normal/Luratech builds.
Line: 10 to 10
  https://git.ghostscript.com/?p=user/julian/julian-tools.git;a=blob;f=jtest.py;hb=HEAD
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Performance info

 
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See: https://ghostscript.com/~julian/luratech-performance.html
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Performance info

 
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As of 2020-1-10, this compares both speed and memory use.
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Diffs in output

Revision 142020-01-17 - JulianSmith

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META TOPICPARENT name="JulianSmith"
CDX3C1DC_Writer.pdf---+ Comparing gs normal/Luratech builds.
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  • Shows bmpcmp diffs, but without toolbin/htmldiff.pl dynamic interface.
  • As of 2019-12-20:
    • These are with bmpcmp -t 33
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    • There are 30 diffs, of which 3 a significant.
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    • There are 30 diffs, of which 3 are significant.
 
  • Each row of 3 images is: Normal - Luratech - bmpcmp-diff

Summary

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Behaviour of normal build needs looking at for these input files:
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As of 2020-1-17, behaviour of normal build needs looking at for these input files:
 
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Notes about each diff (please feel free to add more information/thoughts/comments):

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Detailed notes about each diff (please feel free to add more information/thoughts/comments):

 

https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/comparefiles/Bug694909.pdf

Revision 132020-01-15 - JulianSmith

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META TOPICPARENT name="JulianSmith"
CDX3C1DC_Writer.pdf---+ Comparing gs normal/Luratech builds.

Revision 122020-01-15 - JulianSmith

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META TOPICPARENT name="JulianSmith"
CDX3C1DC_Writer.pdf---+ Comparing gs normal/Luratech builds.
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  • Shows bmpcmp diffs, but without toolbin/htmldiff.pl dynamic interface.
  • As of 2019-12-20:
    • These are with bmpcmp -t 33
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    • There are 30 diffs, of which 3 have been fixed.
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    • There are 30 diffs, of which 3 a significant.
 
  • Each row of 3 images is: Normal - Luratech - bmpcmp-diff
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Summary

Behaviour of normal build needs looking at for these input files:

* https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/slow/normal_348.pdf * https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/problems/normal_625.pdf * https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_ATS/AC8Z61EC_Save.pdf

 

Notes about each diff (please feel free to add more information/thoughts/comments):

Revision 112020-01-14 - JulianSmith

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META TOPICPARENT name="JulianSmith"
CDX3C1DC_Writer.pdf---+ Comparing gs normal/Luratech builds.
Line: 33 to 33
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/comparefiles/Bug694909.pdf
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OK
 Blue line above/below image
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sebras: Acroread draws the image below the image, as do gs when openjpeg is used. In the file the card is drawn two times: first the blue line is drawn, then the top part of the card, then the bottom half of the card, next the entire card is drawn again as a J2K image on top on what was just drawn. openjpeg outputs a warning about the the meth value in the color box not being a recognized value, but it continues parsing the J2K image while ignoring the color box information. Presumably Luratech errors out on the invalid meth value while parsing the J2K image and then the blue line and card halves previously drawn will be visible instead.
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sebras: Acroread draws the image below the image, as do gs when openjpeg is used. In the file the card is drawn two times: first the blue line is drawn, then the top part of the card, then the bottom half of the card, next the entire card is drawn again as a J2K image on top on what was just drawn. openjpeg outputs a warning about the the meth value in the color box not being a recognized value, but it continues parsing the J2K image while ignoring the color box information. Presumably Luratech errors out on the invalid meth value while parsing the J2K image and then the blue line and card halves previously drawn will be visible instead.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/comparefiles/Bug688807.pdf
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Insignificant differences
 sebras: Initially I couldn't see the difference. Importing the first two images (with the text "www.zil") and flipping between them in GIMP I notice that the openjpeg one is more blurry at the wave crests compared to Luratech. Is this a subsampling issue for one of the components? Might not be a huge issue.

https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/slow/normal_348.pdf

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Investigate more
 Default no images, Luratech shows images.
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sebras: Acroread decodes the city/bus image at the bottom of the page without issues, but the map at top have visible issues. openjpeg can also decode the bottom two images, but fails fatally on not the top one. This is because it encounters marker 0x9000 which is unknown to JPEG2000. Running luratech on the command line and trying to decode the top image errors out, and produces no image. why does luratech in gs produce a partially decoded image as seen here? I don't know. Acroread prints a message about a missing font, but doesn't complain about anything broken in the top image.
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sebras: Acroread decodes the city/bus image at the bottom of the page without issues, but the map at top have visible issues. openjpeg can also decode the bottom two images, but fails fatally on not the top one. This is because it encounters marker 0x9000 which is unknown to JPEG2000. Running luratech on the command line and trying to decode the top image errors out, and produces no image. why does luratech in gs produce a partially decoded image as seen here? I don't know. Acroread prints a message about a missing font, but doesn't complain about anything broken in the top image.

Normal build show addition errors in output compared to lulratech:

openjpeg error: Marker is not compliant with its position openjpeg error: Failed to decode the codestream in the JP2 file openjpeg: failed to decode image!

  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/slow/normal_649.pdf
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OK
 Odd square is white/grey without/with luratech.
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sebras: even after extracting all the images that make up this page both using luratech and openjpeg I can't see why gs with luratech ends up rendering the gray square. Acroread draw the same way gs with openjpeg does, so openjpeg arguably does a better job.
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sebras: even after extracting all the images that make up this page both using luratech and openjpeg I can't see why gs with luratech ends up rendering the gray square. Acroread draw the same way gs with openjpeg does, so openjpeg arguably does a better job.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/problems/normal_625.pdf
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Investigate more
 sebras: I extracted the j2k image and decoded each channel with luratech/openjpeg. the first component appears to decode identically, while components two and three are very different. Doing this reveals the differences that may be hard to spot in the image due to its nature. openjpeg emits a number of warnings while luratech is completely quiet. There are differences to openjpeg when compared to Acroread. Acroreda shows no warnings. Is this perhaps a real issue in openjpeg?

https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/problems/normal_716.pdf

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OK
 Default no image, Luratech shows image. Fixed by 147591b7a8 'PDF interpreter - don't abort on errors in JBIG2 globals'.
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sebras: I'm having a hard time proving that ken's commit 147591b7a8390d0e98418851b60ac67e659cf2f1 fixes this issue. I may be doing something wrong, so I need to retest this. This file has since disappeared from the difference checks, so I guess ken's commit fixed it. I will not do any retesting to confirm that.
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sebras: I'm having a hard time proving that ken's commit 147591b7a8390d0e98418851b60ac67e659cf2f1 fixes this issue. I may be doing something wrong, so I need to retest this. This file has since disappeared from the difference checks, so I guess ken's commit fixed it. I will not do any retesting to confirm that.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/problems/normal_670.pdf
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OK
 Default no image, Luratech shows image. Fixed by 147591b7a8 'PDF interpreter - don't abort on errors in JBIG2 globals'.
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sebras: I'm having a hard time proving that ken's commit 147591b7a8390d0e98418851b60ac67e659cf2f1 fixes this issue. I may be doing something wrong, so I need to retest this. This file has since disappeared from the difference checks, so I guess ken's commit fixed it. I will not do any retesting to confirm that.
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sebras: I'm having a hard time proving that ken's commit 147591b7a8390d0e98418851b60ac67e659cf2f1 fixes this issue. I may be doing something wrong, so I need to retest this. This file has since disappeared from the difference checks, so I guess ken's commit fixed it. I will not do any retesting to confirm that.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/problems/normal_1264.pdf
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OK
 Default no image, Luratech shows image. Fixed by 147591b7a8 'PDF interpreter - don't abort on errors in JBIG2 globals'.
Changed:
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sebras: I'm having a hard time proving that ken's commit 147591b7a8390d0e98418851b60ac67e659cf2f1 fixes this issue. I may be doing something wrong, so I need to retest this. This file has since disappeared from the difference checks, so I guess ken's commit fixed it. I will not do any retesting to confirm that.
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sebras: I'm having a hard time proving that ken's commit 147591b7a8390d0e98418851b60ac67e659cf2f1 fixes this issue. I may be doing something wrong, so I need to retest this. This file has since disappeared from the difference checks, so I guess ken's commit fixed it. I will not do any retesting to confirm that.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_FTS/fts_01_0105.pdf
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sebras: Even if i extract the image and decode it using the openjpeg and luratech command line tools and flip between the two decoded images in gimp, I can't tell a difference.
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OK

sebras: Even if i extract the image and decode it using the openjpeg and luratech command line tools and flip between the two decoded images in gimp, I can't tell a difference.

  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_FTS/fts_17_1710.pdf
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sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
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OK

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.

  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_FTS/fts_25_2525.pdf
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sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
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OK

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.

  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_FTS/fts_31_3103.pdf
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sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
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OK

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.

  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_FTS/fts_25_2523.pdf
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sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
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OK

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.

  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_2.0_FTS/fts_25_2527.pdf
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sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
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OK

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.

  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_ATS/CDX3C1DC_Writer.pdf
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sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
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OK

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.

  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_ATS/PSELI1DC_Writer.pdf
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sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
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OK

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.

  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_ATS/ID5ZE1DC_Save.pdf
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sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
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OK

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.

  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_ATS/AIX391CC_Save.pdf
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sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
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OK

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.

  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_ATS/PSELI1DC_Dist.pdf
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sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
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OK

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.

  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_ATS/PSELI1DC_Save.pdf
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sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
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OK

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.

  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_ATS/PS1XF1CC_Save.pdf
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sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
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OK

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.

  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_ATS/AC8ZC1CC_Writer.pdf
Changed:
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sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
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OK

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.

  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_ATS/AC8Z61EC_Save.pdf
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sebras: on the first page where the first difference is, appears to render differently to acroread. is this a bug in the blend modes, regardless of what j2k decoder is used? The same goes for the rendering difference on pages 10, 11 and 12, openjpeg and luratech both differ from the acoread rendering.
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Investigate more

sebras: on the first page where the first difference is, appears to render differently to acroread. is this a bug in the blend modes, regardless of what j2k decoder is used? The same goes for the rendering difference on pages 10, 11 and 12, openjpeg and luratech both differ from the acoread rendering.

  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/sumatra/jbig2_null_segments_and_glyphs.pdf
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OK
 Default no image, Luratech shows image.
Changed:
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sebras: ken's commit 147591b7a8390d0e98418851b60ac67e659cf2f1 fixes this issue. previously only gs built with luratech would be able to continue after luratech failed to decode the image, now gs built with jbig2dec performs the same.
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sebras: ken's commit 147591b7a8390d0e98418851b60ac67e659cf2f1 fixes this issue. previously only gs built with luratech would be able to continue after luratech failed to decode the image, now gs built with jbig2dec performs the same.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/sumatra/use-after-free_from_pdf_load_compressed_stream.pdf
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OK
 Default black, Luratech white.
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sebras: the JBIG2 image here is broken and jbig2dec limps by, warns and tries to export a white image of the correct size (2104x2779), next gs inverts it (different opinions on whether 0 or 1 is black) and puts it on the page. luratech actually fails to decode the jbig2 image, thereby leaving the PDF page the default white.
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sebras: the JBIG2 image here is broken and jbig2dec limps by, warns and tries to export a white image of the correct size (2104x2779), next gs inverts it (different opinions on whether 0 or 1 is black) and puts it on the page. luratech actually fails to decode the jbig2 image, thereby leaving the PDF page the default white.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/sumatra/jbig2dec_memory_leak.pdf
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OK
 Default shows image, Luratech no image.
Changed:
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sebras: progression, jbig2dec's output is more useful than luratech's.
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sebras: progression, jbig2dec's output is more useful than luratech's.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests/pdf/Jbig2_042_22.pdf
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OK
 Default shows image, Luratech no image.
Changed:
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sebras: progression, jbig2dec's output is more useful than luratech's.
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sebras: progression, jbig2dec's output is more useful than luratech's.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests/pdf/Jbig2_042_21.pdf
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OK
 Default shows image, Luratech no image.
Changed:
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sebras: progression, jbig2dec's output is more useful than luratech's.
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sebras: progression, jbig2dec's output is more useful than luratech's.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests/pdf/Jbig2_042_24.pdf
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OK
 Default shows image, Luratech no image.
Changed:
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sebras: progression, jbig2dec's output is more useful than luratech's.
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sebras: progression, jbig2dec's output is more useful than luratech's.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests/pdf/Jbig2_042_23.pdf
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OK
 Default shows image, Luratech no image.
Changed:
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sebras: progression, jbig2dec's output is more useful than luratech's.
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sebras: progression, jbig2dec's output is more useful than luratech's.
 

Comments

Revision 102020-01-14 - SebastianRasmussen

Line: 1 to 1
 
META TOPICPARENT name="JulianSmith"
CDX3C1DC_Writer.pdf---+ Comparing gs normal/Luratech builds.
Line: 43 to 43
 https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/slow/normal_348.pdf

Default no images, Luratech shows images.

Changed:
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sebras: Acroread decodes the city and the bus image without issues, but the map at top have visible issues. openjpeg can also decode the bottom two images, but not the top one. Running luratech on the command line and trying to decode the top image errors out, and produces no image. I can't reproduce the output with luratech seen in the test on this page. Acroread prints a message about a missing font, but doesn't complain about anything broken in the top image.
>
>

sebras: Acroread decodes the city/bus image at the bottom of the page without issues, but the map at top have visible issues. openjpeg can also decode the bottom two images, but fails fatally on not the top one. This is because it encounters marker 0x9000 which is unknown to JPEG2000. Running luratech on the command line and trying to decode the top image errors out, and produces no image. why does luratech in gs produce a partially decoded image as seen here? I don't know. Acroread prints a message about a missing font, but doesn't complain about anything broken in the top image.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/slow/normal_649.pdf

Revision 92020-01-10 - SebastianRasmussen

Line: 1 to 1
 
META TOPICPARENT name="JulianSmith"
CDX3C1DC_Writer.pdf---+ Comparing gs normal/Luratech builds.
Line: 57 to 57
 https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/problems/normal_716.pdf

Default no image, Luratech shows image. Fixed by 147591b7a8 'PDF interpreter - don't abort on errors in JBIG2 globals'.

Changed:
<
<

sebras: I'm having a hard time proving that ken's commit 147591b7a8390d0e98418851b60ac67e659cf2f1 fixes this issue. I may be doing something wrong, so I need to retest this.
>
>

sebras: I'm having a hard time proving that ken's commit 147591b7a8390d0e98418851b60ac67e659cf2f1 fixes this issue. I may be doing something wrong, so I need to retest this. This file has since disappeared from the difference checks, so I guess ken's commit fixed it. I will not do any retesting to confirm that.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/problems/normal_670.pdf

Default no image, Luratech shows image. Fixed by 147591b7a8 'PDF interpreter - don't abort on errors in JBIG2 globals'.

Changed:
<
<

sebras: I'm having a hard time proving that ken's commit 147591b7a8390d0e98418851b60ac67e659cf2f1 fixes this issue. I may be doing something wrong, so I need to retest this.
>
>

sebras: I'm having a hard time proving that ken's commit 147591b7a8390d0e98418851b60ac67e659cf2f1 fixes this issue. I may be doing something wrong, so I need to retest this. This file has since disappeared from the difference checks, so I guess ken's commit fixed it. I will not do any retesting to confirm that.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/problems/normal_1264.pdf

Default no image, Luratech shows image. Fixed by 147591b7a8 'PDF interpreter - don't abort on errors in JBIG2 globals'.

Changed:
<
<

sebras: I'm having a hard time proving that ken's commit 147591b7a8390d0e98418851b60ac67e659cf2f1 fixes this issue. I may be doing something wrong, so I need to retest this.
>
>

sebras: I'm having a hard time proving that ken's commit 147591b7a8390d0e98418851b60ac67e659cf2f1 fixes this issue. I may be doing something wrong, so I need to retest this. This file has since disappeared from the difference checks, so I guess ken's commit fixed it. I will not do any retesting to confirm that.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_FTS/fts_01_0105.pdf

Revision 82020-01-10 - JulianSmith

Line: 1 to 1
 
META TOPICPARENT name="JulianSmith"
CDX3C1DC_Writer.pdf---+ Comparing gs normal/Luratech builds.
Line: 14 to 14
  See: https://ghostscript.com/~julian/luratech-performance.html
Changed:
<
<
  • As of 2019-12-20, this does not have timing for all test files - will take a few hours for this to complete.
>
>
As of 2020-1-10, this compares both speed and memory use.
 

Diffs in output

Line: 24 to 23
 
  • Shows bmpcmp diffs, but without toolbin/htmldiff.pl dynamic interface.
  • As of 2019-12-20:
    • These are with bmpcmp -t 33
Changed:
<
<
    • There are 30 diffs.
>
>
    • There are 30 diffs, of which 3 have been fixed.
 
  • Each row of 3 images is: Normal - Luratech - bmpcmp-diff

Revision 72020-01-08 - JulianSmith

Line: 1 to 1
 
META TOPICPARENT name="JulianSmith"
CDX3C1DC_Writer.pdf---+ Comparing gs normal/Luratech builds.

-- Julian Smith - 2019-12-20

Added:
>
>

Script

Results below were obtained with this python script:

https://git.ghostscript.com/?p=user/julian/julian-tools.git;a=blob;f=jtest.py;hb=HEAD

 

Performance info

See: https://ghostscript.com/~julian/luratech-performance.html

Revision 62020-01-08 - JulianSmith

Line: 1 to 1
 
META TOPICPARENT name="JulianSmith"
CDX3C1DC_Writer.pdf---+ Comparing gs normal/Luratech builds.
Line: 51 to 51
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/problems/normal_716.pdf
Changed:
<
<
Default no image, Luratech shows image.
>
>
Default no image, Luratech shows image. Fixed by 147591b7a8 'PDF interpreter - don't abort on errors in JBIG2 globals'.
 
sebras: I'm having a hard time proving that ken's commit 147591b7a8390d0e98418851b60ac67e659cf2f1 fixes this issue. I may be doing something wrong, so I need to retest this.

https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/problems/normal_670.pdf

Changed:
<
<
Default no image, Luratech shows image.
>
>
Default no image, Luratech shows image. Fixed by 147591b7a8 'PDF interpreter - don't abort on errors in JBIG2 globals'.
 
sebras: I'm having a hard time proving that ken's commit 147591b7a8390d0e98418851b60ac67e659cf2f1 fixes this issue. I may be doing something wrong, so I need to retest this.

https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/problems/normal_1264.pdf

Changed:
<
<
Default no image, Luratech shows image.
>
>
Default no image, Luratech shows image. Fixed by 147591b7a8 'PDF interpreter - don't abort on errors in JBIG2 globals'.
 
sebras: I'm having a hard time proving that ken's commit 147591b7a8390d0e98418851b60ac67e659cf2f1 fixes this issue. I may be doing something wrong, so I need to retest this.

https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_FTS/fts_01_0105.pdf

Revision 52020-01-07 - SebastianRasmussen

Line: 1 to 1
 
META TOPICPARENT name="JulianSmith"
Changed:
<
<

Comparing gs normal/Luratech builds.

>
>
CDX3C1DC_Writer.pdf---+ Comparing gs normal/Luratech builds.
  -- Julian Smith - 2019-12-20
Line: 29 to 29
 https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/comparefiles/Bug694909.pdf

Blue line above/below image

Changed:
<
<
sebras: Acroread draws the image below the image, as do gs when openjpeg is used.
>
>

sebras: Acroread draws the image below the image, as do gs when openjpeg is used. In the file the card is drawn two times: first the blue line is drawn, then the top part of the card, then the bottom half of the card, next the entire card is drawn again as a J2K image on top on what was just drawn. openjpeg outputs a warning about the the meth value in the color box not being a recognized value, but it continues parsing the J2K image while ignoring the color box information. Presumably Luratech errors out on the invalid meth value while parsing the J2K image and then the blue line and card halves previously drawn will be visible instead.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/comparefiles/Bug688807.pdf
Changed:
<
<
sebras: Initially I couldn't see the difference. Importing the first two images (with the text "www.zil") and flipping between them in GIMP I notice that the openjpeg one is more blurry at the wave crests compared to Luratech. Is this a subsampling issue for one of the components?
>
>
sebras: Initially I couldn't see the difference. Importing the first two images (with the text "www.zil") and flipping between them in GIMP I notice that the openjpeg one is more blurry at the wave crests compared to Luratech. Is this a subsampling issue for one of the components? Might not be a huge issue.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/slow/normal_348.pdf

Default no images, Luratech shows images.

Changed:
<
<
sebras: Acroread decodes the city and the bus image without issues, but the map at top have visible issues. openjpeg can also decode the bottom two images, but not the top one. Perhaps this is down to gs giving up on processing too early?
>
>

sebras: Acroread decodes the city and the bus image without issues, but the map at top have visible issues. openjpeg can also decode the bottom two images, but not the top one. Running luratech on the command line and trying to decode the top image errors out, and produces no image. I can't reproduce the output with luratech seen in the test on this page. Acroread prints a message about a missing font, but doesn't complain about anything broken in the top image.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/slow/normal_649.pdf

Odd square is white/grey without/with luratech.

Added:
>
>

sebras: even after extracting all the images that make up this page both using luratech and openjpeg I can't see why gs with luratech ends up rendering the gray square. Acroread draw the same way gs with openjpeg does, so openjpeg arguably does a better job.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/problems/normal_625.pdf
Changed:
<
<
sebras: I extracted the j2k image and decoded each channel with luratech/openjpeg. the first component appears to decode identically, while components two and three are very different. Doing this reveals the differences that may be hard to spot in the image. There are differences to openjpeg when compared to Acroread.
>
>
sebras: I extracted the j2k image and decoded each channel with luratech/openjpeg. the first component appears to decode identically, while components two and three are very different. Doing this reveals the differences that may be hard to spot in the image due to its nature. openjpeg emits a number of warnings while luratech is completely quiet. There are differences to openjpeg when compared to Acroread. Acroreda shows no warnings. Is this perhaps a real issue in openjpeg?
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/problems/normal_716.pdf

Default no image, Luratech shows image.

Changed:
<
<
>
>

sebras: I'm having a hard time proving that ken's commit 147591b7a8390d0e98418851b60ac67e659cf2f1 fixes this issue. I may be doing something wrong, so I need to retest this.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/problems/normal_670.pdf

Default no image, Luratech shows image.

Changed:
<
<
>
>

sebras: I'm having a hard time proving that ken's commit 147591b7a8390d0e98418851b60ac67e659cf2f1 fixes this issue. I may be doing something wrong, so I need to retest this.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/problems/normal_1264.pdf

Default no image, Luratech shows image.

Changed:
<
<
>
>

sebras: I'm having a hard time proving that ken's commit 147591b7a8390d0e98418851b60ac67e659cf2f1 fixes this issue. I may be doing something wrong, so I need to retest this.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_FTS/fts_01_0105.pdf
Changed:
<
<
sebras: Even if i extract the image and decode it using the openjpeg and luratech command line tools and flip between the two decoded images in gimp, I can't tell a difference.
>
>
?
sebras: Even if i extract the image and decode it using the openjpeg and luratech command line tools and flip between the two decoded images in gimp, I can't tell a difference.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_FTS/fts_17_1710.pdf
Changed:
<
<
sebras:
>
>
?
sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_FTS/fts_25_2525.pdf

?

Added:
>
>

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_FTS/fts_31_3103.pdf

?

Added:
>
>

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_FTS/fts_25_2523.pdf

?

Added:
>
>

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_2.0_FTS/fts_25_2527.pdf

?

Added:
>
>

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_ATS/CDX3C1DC_Writer.pdf

?

Added:
>
>

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_ATS/PSELI1DC_Writer.pdf

?

Added:
>
>

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_ATS/ID5ZE1DC_Save.pdf

?

Added:
>
>

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_ATS/AIX391CC_Save.pdf

?

Added:
>
>

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_ATS/PSELI1DC_Dist.pdf

?

Added:
>
>

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_ATS/PSELI1DC_Save.pdf

?

Added:
>
>

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_ATS/PS1XF1CC_Save.pdf

?

Added:
>
>

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_ATS/AC8ZC1CC_Writer.pdf

?

Added:
>
>

sebras: I can't spot any obvious visual differences even after extracting the image and decoring with openjpeg/luratech and flipping between the images in gimp.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_ATS/AC8Z61EC_Save.pdf

?

Added:
>
>

sebras: on the first page where the first difference is, appears to render differently to acroread. is this a bug in the blend modes, regardless of what j2k decoder is used? The same goes for the rendering difference on pages 10, 11 and 12, openjpeg and luratech both differ from the acoread rendering.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/sumatra/jbig2_null_segments_and_glyphs.pdf

Default no image, Luratech shows image.

Changed:
<
<
>
>

sebras: ken's commit 147591b7a8390d0e98418851b60ac67e659cf2f1 fixes this issue. previously only gs built with luratech would be able to continue after luratech failed to decode the image, now gs built with jbig2dec performs the same.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/sumatra/use-after-free_from_pdf_load_compressed_stream.pdf

Default black, Luratech white.

Changed:
<
<
>
>

sebras: the JBIG2 image here is broken and jbig2dec limps by, warns and tries to export a white image of the correct size (2104x2779), next gs inverts it (different opinions on whether 0 or 1 is black) and puts it on the page. luratech actually fails to decode the jbig2 image, thereby leaving the PDF page the default white.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/sumatra/jbig2dec_memory_leak.pdf

Default shows image, Luratech no image.

Changed:
<
<
>
>

sebras: progression, jbig2dec's output is more useful than luratech's.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests/pdf/Jbig2_042_22.pdf

Default shows image, Luratech no image.

Changed:
<
<
>
>

sebras: progression, jbig2dec's output is more useful than luratech's.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests/pdf/Jbig2_042_21.pdf

Default shows image, Luratech no image.

Changed:
<
<
>
>

sebras: progression, jbig2dec's output is more useful than luratech's.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests/pdf/Jbig2_042_24.pdf

Default shows image, Luratech no image.

Changed:
<
<
>
>

sebras: progression, jbig2dec's output is more useful than luratech's.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests/pdf/Jbig2_042_23.pdf

Default shows image, Luratech no image.

Changed:
<
<
>
>

sebras: progression, jbig2dec's output is more useful than luratech's.
 

Comments

Revision 42020-01-06 - SebastianRasmussen

Line: 1 to 1
 
META TOPICPARENT name="JulianSmith"

Comparing gs normal/Luratech builds.

Line: 29 to 29
 https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/comparefiles/Bug694909.pdf

Blue line above/below image

Changed:
<
<
>
>
sebras: Acroread draws the image below the image, as do gs when openjpeg is used.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/comparefiles/Bug688807.pdf
Changed:
<
<
?
>
>
sebras: Initially I couldn't see the difference. Importing the first two images (with the text "www.zil") and flipping between them in GIMP I notice that the openjpeg one is more blurry at the wave crests compared to Luratech. Is this a subsampling issue for one of the components?
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/slow/normal_348.pdf

Default no images, Luratech shows images.

Added:
>
>
sebras: Acroread decodes the city and the bus image without issues, but the map at top have visible issues. openjpeg can also decode the bottom two images, but not the top one. Perhaps this is down to gs giving up on processing too early?
 

https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/slow/normal_649.pdf

Line: 44 to 45
  Odd square is white/grey without/with luratech.
Deleted:
<
<
 https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/problems/normal_625.pdf
Changed:
<
<
?
>
>
sebras: I extracted the j2k image and decoded each channel with luratech/openjpeg. the first component appears to decode identically, while components two and three are very different. Doing this reveals the differences that may be hard to spot in the image. There are differences to openjpeg when compared to Acroread.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/customer394/problems/normal_716.pdf
Line: 66 to 66
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_FTS/fts_01_0105.pdf
Changed:
<
<
?
>
>
sebras: Even if i extract the image and decode it using the openjpeg and luratech command line tools and flip between the two decoded images in gimp, I can't tell a difference.
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_FTS/fts_17_1710.pdf
Changed:
<
<
?
>
>
sebras:
  https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/pdf/PDF_1.7_FTS/fts_25_2525.pdf

Revision 32019-12-20 - JulianSmith

Line: 1 to 1
 
META TOPICPARENT name="JulianSmith"
Changed:
<
<

Title

Article text.

>
>

Comparing gs normal/Luratech builds.

  -- Julian Smith - 2019-12-20
Changed:
<
<

performance info

>
>

Performance info

  See: https://ghostscript.com/~julian/luratech-performance.html
Changed:
<
<
(As of 2019-12-20, this only has two entries.)
>
>
  • As of 2019-12-20, this does not have timing for all test files - will take a few hours for this to complete.

Diffs in output

 
Changed:
<
<

bmpcmp diffs

>
>
See: https://ghostscript.com/~julian/luratech-diffs.html
 
Changed:
<
<
All bmpcmp diffs (as of 2019-12-20, these are with bmpcmp -t 33): https://ghostscript.com/~julian/luratech-diffs.html
>
>
  • Shows bmpcmp diffs, but without toolbin/htmldiff.pl dynamic interface.
  • As of 2019-12-20:
    • These are with bmpcmp -t 33
    • There are 30 diffs.
 
Changed:
<
<
Each row of 3 images is: Normal - Luratech - bmpcmp-diff
>
>
  • Each row of 3 images is: Normal - Luratech - bmpcmp-diff
 
Changed:
<
<

Notes about each input file

>
>

Notes about each diff (please feel free to add more information/thoughts/comments):

 

https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/comparefiles/Bug694909.pdf

Revision 22019-12-20 - JulianSmith

Line: 1 to 1
 
META TOPICPARENT name="JulianSmith"

Title

Line: 6 to 6
  -- Julian Smith - 2019-12-20
Changed:
<
<
All bmpcmp diffs (as of 2019-12-20, these are with bmpcmp -t 33): https://ghostscript.com/~julian/luratechdiffs.html
>
>

performance info

See: https://ghostscript.com/~julian/luratech-performance.html

(As of 2019-12-20, this only has two entries.)


bmpcmp diffs

All bmpcmp diffs (as of 2019-12-20, these are with bmpcmp -t 33): https://ghostscript.com/~julian/luratech-diffs.html

  Each row of 3 images is: Normal - Luratech - bmpcmp-diff

Revision 12019-12-20 - JulianSmith

Line: 1 to 1
Added:
>
>
META TOPICPARENT name="JulianSmith"

Title

Article text.

-- Julian Smith - 2019-12-20

All bmpcmp diffs (as of 2019-12-20, these are with bmpcmp -t 33): https://ghostscript.com/~julian/luratechdiffs.html

Each row of 3 images is: Normal - Luratech - bmpcmp-diff

Notes about each input file

https://ghostscript.com/~julian/luratechdiffs.html#/home2/regression/cluster/tests_private/comparefiles/Bug694909.pdf

Blue line above/below image

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