[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Tim Allison updated PDFBOX-4184: Attachment: 032163.jpg > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Assignee: Tim Allison >Priority: Minor > Fix For: 2.0.12, 3.0.0 PDFBox > > Attachments: 032163.jpg, 16bit.png, LoadGovdocs.java, > fix_profile_use.patch, fix_profile_use3.patch, fix_profile_use4.patch, > images.zip, lossless_predictor_based_imageencoding.patch, > lossless_predictor_based_imageencoding_v2.patch, > lossless_predictor_based_imageencoding_v3.patch, > lossless_predictor_based_imageencoding_v4.patch, > lossless_predictor_based_imageencoding_v5.patch, > lossless_predictor_based_imageencoding_v6.patch, > pdfbox_support_16bit_image_write.patch, png16-arrow-bad-no-smask.pdf, > png16-arrow-bad.pdf, png16-arrow-good-no-mask.pdf, png16-arrow-good.pdf, > size_compare.txt > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Emmeran Seehuber updated PDFBOX-4184: - Attachment: fix_profile_use4.patch > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Priority: Minor > Fix For: 2.0.12, 3.0.0 PDFBox > > Attachments: 16bit.png, LoadGovdocs.java, fix_profile_use.patch, > fix_profile_use3.patch, fix_profile_use4.patch, images.zip, > lossless_predictor_based_imageencoding.patch, > lossless_predictor_based_imageencoding_v2.patch, > lossless_predictor_based_imageencoding_v3.patch, > lossless_predictor_based_imageencoding_v4.patch, > lossless_predictor_based_imageencoding_v5.patch, > lossless_predictor_based_imageencoding_v6.patch, > pdfbox_support_16bit_image_write.patch, png16-arrow-bad-no-smask.pdf, > png16-arrow-bad.pdf, png16-arrow-good-no-mask.pdf, png16-arrow-good.pdf, > size_compare.txt > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Emmeran Seehuber updated PDFBOX-4184: - Attachment: fix_profile_use3.patch > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Priority: Minor > Fix For: 2.0.12, 3.0.0 PDFBox > > Attachments: 16bit.png, LoadGovdocs.java, fix_profile_use.patch, > fix_profile_use3.patch, images.zip, > lossless_predictor_based_imageencoding.patch, > lossless_predictor_based_imageencoding_v2.patch, > lossless_predictor_based_imageencoding_v3.patch, > lossless_predictor_based_imageencoding_v4.patch, > lossless_predictor_based_imageencoding_v5.patch, > lossless_predictor_based_imageencoding_v6.patch, > pdfbox_support_16bit_image_write.patch, png16-arrow-bad-no-smask.pdf, > png16-arrow-bad.pdf, png16-arrow-good-no-mask.pdf, png16-arrow-good.pdf, > size_compare.txt > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Emmeran Seehuber updated PDFBOX-4184: - Attachment: (was: fix_profile_use2.patch) > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Priority: Minor > Fix For: 2.0.12, 3.0.0 PDFBox > > Attachments: 16bit.png, LoadGovdocs.java, fix_profile_use.patch, > images.zip, lossless_predictor_based_imageencoding.patch, > lossless_predictor_based_imageencoding_v2.patch, > lossless_predictor_based_imageencoding_v3.patch, > lossless_predictor_based_imageencoding_v4.patch, > lossless_predictor_based_imageencoding_v5.patch, > lossless_predictor_based_imageencoding_v6.patch, > pdfbox_support_16bit_image_write.patch, png16-arrow-bad-no-smask.pdf, > png16-arrow-bad.pdf, png16-arrow-good-no-mask.pdf, png16-arrow-good.pdf, > size_compare.txt > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Emmeran Seehuber updated PDFBOX-4184: - Attachment: fix_profile_use2.patch > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Priority: Minor > Fix For: 2.0.12, 3.0.0 PDFBox > > Attachments: 16bit.png, LoadGovdocs.java, fix_profile_use.patch, > fix_profile_use2.patch, images.zip, > lossless_predictor_based_imageencoding.patch, > lossless_predictor_based_imageencoding_v2.patch, > lossless_predictor_based_imageencoding_v3.patch, > lossless_predictor_based_imageencoding_v4.patch, > lossless_predictor_based_imageencoding_v5.patch, > lossless_predictor_based_imageencoding_v6.patch, > pdfbox_support_16bit_image_write.patch, png16-arrow-bad-no-smask.pdf, > png16-arrow-bad.pdf, png16-arrow-good-no-mask.pdf, png16-arrow-good.pdf, > size_compare.txt > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Emmeran Seehuber updated PDFBOX-4184: - Attachment: fix_profile_use.patch > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Priority: Minor > Fix For: 2.0.12, 3.0.0 PDFBox > > Attachments: 16bit.png, LoadGovdocs.java, fix_profile_use.patch, > images.zip, lossless_predictor_based_imageencoding.patch, > lossless_predictor_based_imageencoding_v2.patch, > lossless_predictor_based_imageencoding_v3.patch, > lossless_predictor_based_imageencoding_v4.patch, > lossless_predictor_based_imageencoding_v5.patch, > lossless_predictor_based_imageencoding_v6.patch, > pdfbox_support_16bit_image_write.patch, png16-arrow-bad-no-smask.pdf, > png16-arrow-bad.pdf, png16-arrow-good-no-mask.pdf, png16-arrow-good.pdf, > size_compare.txt > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Tilman Hausherr updated PDFBOX-4184: Attachment: images.zip > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Priority: Minor > Fix For: 2.0.12, 3.0.0 PDFBox > > Attachments: 16bit.png, LoadGovdocs.java, images.zip, > lossless_predictor_based_imageencoding.patch, > lossless_predictor_based_imageencoding_v2.patch, > lossless_predictor_based_imageencoding_v3.patch, > lossless_predictor_based_imageencoding_v4.patch, > lossless_predictor_based_imageencoding_v5.patch, > lossless_predictor_based_imageencoding_v6.patch, > pdfbox_support_16bit_image_write.patch, png16-arrow-bad-no-smask.pdf, > png16-arrow-bad.pdf, png16-arrow-good-no-mask.pdf, png16-arrow-good.pdf, > size_compare.txt > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Emmeran Seehuber updated PDFBOX-4184: - Attachment: size_compare.txt > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Priority: Minor > Fix For: 2.0.12, 3.0.0 PDFBox > > Attachments: 16bit.png, LoadGovdocs.java, > lossless_predictor_based_imageencoding.patch, > lossless_predictor_based_imageencoding_v2.patch, > lossless_predictor_based_imageencoding_v3.patch, > lossless_predictor_based_imageencoding_v4.patch, > lossless_predictor_based_imageencoding_v5.patch, > lossless_predictor_based_imageencoding_v6.patch, > pdfbox_support_16bit_image_write.patch, png16-arrow-bad-no-smask.pdf, > png16-arrow-bad.pdf, png16-arrow-good-no-mask.pdf, png16-arrow-good.pdf, > size_compare.txt > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Emmeran Seehuber updated PDFBOX-4184: - Attachment: lossless_predictor_based_imageencoding_v6.patch > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Priority: Minor > Fix For: 2.0.12, 3.0.0 PDFBox > > Attachments: 16bit.png, LoadGovdocs.java, > lossless_predictor_based_imageencoding.patch, > lossless_predictor_based_imageencoding_v2.patch, > lossless_predictor_based_imageencoding_v3.patch, > lossless_predictor_based_imageencoding_v4.patch, > lossless_predictor_based_imageencoding_v5.patch, > lossless_predictor_based_imageencoding_v6.patch, > pdfbox_support_16bit_image_write.patch, png16-arrow-bad-no-smask.pdf, > png16-arrow-bad.pdf, png16-arrow-good-no-mask.pdf, png16-arrow-good.pdf > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Emmeran Seehuber updated PDFBOX-4184: - Attachment: (was: 16bit.png) > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Priority: Minor > Fix For: 2.0.12, 3.0.0 PDFBox > > Attachments: 16bit.png, LoadGovdocs.java, > lossless_predictor_based_imageencoding.patch, > lossless_predictor_based_imageencoding_v2.patch, > lossless_predictor_based_imageencoding_v3.patch, > lossless_predictor_based_imageencoding_v4.patch, > lossless_predictor_based_imageencoding_v5.patch, > pdfbox_support_16bit_image_write.patch, png16-arrow-bad-no-smask.pdf, > png16-arrow-bad.pdf, png16-arrow-good-no-mask.pdf, png16-arrow-good.pdf > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Emmeran Seehuber updated PDFBOX-4184: - Attachment: 16bit.png > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Priority: Minor > Fix For: 2.0.12, 3.0.0 PDFBox > > Attachments: 16bit.png, 16bit.png, LoadGovdocs.java, > lossless_predictor_based_imageencoding.patch, > lossless_predictor_based_imageencoding_v2.patch, > lossless_predictor_based_imageencoding_v3.patch, > lossless_predictor_based_imageencoding_v4.patch, > lossless_predictor_based_imageencoding_v5.patch, > pdfbox_support_16bit_image_write.patch, png16-arrow-bad-no-smask.pdf, > png16-arrow-bad.pdf, png16-arrow-good-no-mask.pdf, png16-arrow-good.pdf > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Tilman Hausherr updated PDFBOX-4184: Attachment: 16bit.png > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Priority: Minor > Fix For: 2.0.12, 3.0.0 PDFBox > > Attachments: 16bit.png, LoadGovdocs.java, > lossless_predictor_based_imageencoding.patch, > lossless_predictor_based_imageencoding_v2.patch, > lossless_predictor_based_imageencoding_v3.patch, > lossless_predictor_based_imageencoding_v4.patch, > lossless_predictor_based_imageencoding_v5.patch, > pdfbox_support_16bit_image_write.patch, png16-arrow-bad-no-smask.pdf, > png16-arrow-bad.pdf, png16-arrow-good-no-mask.pdf, png16-arrow-good.pdf > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Tilman Hausherr updated PDFBOX-4184: Fix Version/s: (was: 2.0.11) 2.0.12 > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Priority: Minor > Fix For: 3.0.0 PDFBox, 2.0.12 > > Attachments: LoadGovdocs.java, > lossless_predictor_based_imageencoding.patch, > lossless_predictor_based_imageencoding_v2.patch, > lossless_predictor_based_imageencoding_v3.patch, > lossless_predictor_based_imageencoding_v4.patch, > lossless_predictor_based_imageencoding_v5.patch, > pdfbox_support_16bit_image_write.patch, png16-arrow-bad-no-smask.pdf, > png16-arrow-bad.pdf, png16-arrow-good-no-mask.pdf, png16-arrow-good.pdf > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Tilman Hausherr updated PDFBOX-4184: Fix Version/s: 3.0.0 PDFBox 2.0.11 > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Priority: Minor > Fix For: 2.0.11, 3.0.0 PDFBox > > Attachments: LoadGovdocs.java, > lossless_predictor_based_imageencoding.patch, > lossless_predictor_based_imageencoding_v2.patch, > lossless_predictor_based_imageencoding_v3.patch, > lossless_predictor_based_imageencoding_v4.patch, > lossless_predictor_based_imageencoding_v5.patch, > pdfbox_support_16bit_image_write.patch, png16-arrow-bad-no-smask.pdf, > png16-arrow-bad.pdf, png16-arrow-good-no-mask.pdf, png16-arrow-good.pdf > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Tilman Hausherr updated PDFBOX-4184: Fix Version/s: (was: 2.0.10) (was: 3.0.0 PDFBox) > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Priority: Minor > Attachments: LoadGovdocs.java, > lossless_predictor_based_imageencoding.patch, > lossless_predictor_based_imageencoding_v2.patch, > lossless_predictor_based_imageencoding_v3.patch, > lossless_predictor_based_imageencoding_v4.patch, > lossless_predictor_based_imageencoding_v5.patch, > pdfbox_support_16bit_image_write.patch, png16-arrow-bad-no-smask.pdf, > png16-arrow-bad.pdf, png16-arrow-good-no-mask.pdf, png16-arrow-good.pdf > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Emmeran Seehuber updated PDFBOX-4184: - Attachment: lossless_predictor_based_imageencoding_v5.patch > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Priority: Minor > Fix For: 2.0.10, 3.0.0 PDFBox > > Attachments: LoadGovdocs.java, > lossless_predictor_based_imageencoding.patch, > lossless_predictor_based_imageencoding_v2.patch, > lossless_predictor_based_imageencoding_v3.patch, > lossless_predictor_based_imageencoding_v4.patch, > lossless_predictor_based_imageencoding_v5.patch, > pdfbox_support_16bit_image_write.patch, png16-arrow-bad-no-smask.pdf, > png16-arrow-bad.pdf, png16-arrow-good-no-mask.pdf, png16-arrow-good.pdf > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Emmeran Seehuber updated PDFBOX-4184: - Attachment: lossless_predictor_based_imageencoding_v4.patch > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Priority: Minor > Fix For: 2.0.10, 3.0.0 PDFBox > > Attachments: LoadGovdocs.java, > lossless_predictor_based_imageencoding.patch, > lossless_predictor_based_imageencoding_v2.patch, > lossless_predictor_based_imageencoding_v3.patch, > lossless_predictor_based_imageencoding_v4.patch, > pdfbox_support_16bit_image_write.patch, png16-arrow-bad-no-smask.pdf, > png16-arrow-bad.pdf, png16-arrow-good-no-mask.pdf, png16-arrow-good.pdf > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Emmeran Seehuber updated PDFBOX-4184: - Attachment: lossless_predictor_based_imageencoding_v3.patch > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Priority: Minor > Fix For: 2.0.10, 3.0.0 PDFBox > > Attachments: LoadGovdocs.java, > lossless_predictor_based_imageencoding.patch, > lossless_predictor_based_imageencoding_v2.patch, > lossless_predictor_based_imageencoding_v3.patch, > pdfbox_support_16bit_image_write.patch, png16-arrow-bad-no-smask.pdf, > png16-arrow-bad.pdf, png16-arrow-good-no-mask.pdf, png16-arrow-good.pdf > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Emmeran Seehuber updated PDFBOX-4184: - Attachment: lossless_predictor_based_imageencoding_v2.patch > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Priority: Minor > Fix For: 2.0.10, 3.0.0 PDFBox > > Attachments: LoadGovdocs.java, > lossless_predictor_based_imageencoding.patch, > lossless_predictor_based_imageencoding_v2.patch, > pdfbox_support_16bit_image_write.patch, png16-arrow-bad-no-smask.pdf, > png16-arrow-bad.pdf, png16-arrow-good-no-mask.pdf, png16-arrow-good.pdf > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Tilman Hausherr updated PDFBOX-4184: Attachment: LoadGovdocs.java > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Priority: Minor > Fix For: 2.0.10, 3.0.0 PDFBox > > Attachments: LoadGovdocs.java, > lossless_predictor_based_imageencoding.patch, > pdfbox_support_16bit_image_write.patch, png16-arrow-bad-no-smask.pdf, > png16-arrow-bad.pdf, png16-arrow-good-no-mask.pdf, png16-arrow-good.pdf > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Emmeran Seehuber updated PDFBOX-4184: - Attachment: lossless_predictor_based_imageencoding.patch > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Priority: Minor > Fix For: 2.0.10, 3.0.0 PDFBox > > Attachments: lossless_predictor_based_imageencoding.patch, > pdfbox_support_16bit_image_write.patch, png16-arrow-bad-no-smask.pdf, > png16-arrow-bad.pdf, png16-arrow-good-no-mask.pdf, png16-arrow-good.pdf > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Tilman Hausherr updated PDFBOX-4184: Attachment: png16-arrow-good-no-mask.pdf png16-arrow-bad-no-smask.pdf > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Priority: Minor > Fix For: 2.0.10, 3.0.0 PDFBox > > Attachments: pdfbox_support_16bit_image_write.patch, > png16-arrow-bad-no-smask.pdf, png16-arrow-bad.pdf, > png16-arrow-good-no-mask.pdf, png16-arrow-good.pdf > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Tilman Hausherr updated PDFBOX-4184: Attachment: png16-arrow-good.pdf png16-arrow-bad.pdf > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Priority: Minor > Fix For: 2.0.10, 3.0.0 PDFBox > > Attachments: pdfbox_support_16bit_image_write.patch, > png16-arrow-bad.pdf, png16-arrow-good.pdf > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
[jira] [Updated] (PDFBOX-4184) [PATCH]: Support simple lossless compression of 16 bit RGB images
[ https://issues.apache.org/jira/browse/PDFBOX-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Tilman Hausherr updated PDFBOX-4184: Fix Version/s: 3.0.0 PDFBox 2.0.10 > [PATCH]: Support simple lossless compression of 16 bit RGB images > - > > Key: PDFBOX-4184 > URL: https://issues.apache.org/jira/browse/PDFBOX-4184 > Project: PDFBox > Issue Type: Improvement > Components: Writing >Affects Versions: 2.0.9 >Reporter: Emmeran Seehuber >Priority: Minor > Fix For: 2.0.10, 3.0.0 PDFBox > > Attachments: pdfbox_support_16bit_image_write.patch > > > The attached patch add support to write 16 bit per component images > correctly. I've integrated a test for this here: > [https://github.com/rototor/pdfbox-graphics2d/commit/8bf089cb74945bd4f0f15054754f51dd5b361fe9] > It only supports 16-Bit TYPE_CUSTOM with DataType == USHORT images - but this > is what you usually get when you read a 16 bit PNG file. > This would also fix [https://github.com/danfickle/openhtmltopdf/issues/173]. > The patch is against 2.0.9, but should apply to 3.0.0 too. > There is still some room for improvements when writing lossless images, as > the images are currently not efficiently encoded. I.e. you could use PNG > encodings to get a better compression. (By adding a COSName.DECODE_PARMS with > a COSName.PREDICTOR == 15 and encoding the images as PNG). But this is > something for a later patch. It would also need another API, as there is a > tradeoff speed vs compression ratio. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org
