Fix ipptransform media handling (Issue #102)

- If "media/-col" is not specified and "print-scaling" is 'auto' or 'auto-fit',
  check whether input pages actually need scaling.
- When not scaling a page, copy input pages using the original size.

Author: michaelrsweet

CHANGES.md

@@ -19,6 +19,8 @@ libcups v3.0.0 (YYYY-MM-DD)
 - Updated `ippfind` to use the `cupsGetClock` API.
 - Updated `ippeveprinter` to include all ready and supported attributes and
   values in the environment when processing a job.
+- Fixed `ipptransform` media handling to preserve input document dimensions when
+  "media" or "media-col" are not specified (Issue #102)
 - Fixed `cupsJSONExport` functions with empty arrays or objects.
 - Fixed `httpGetDateTime` for dates in the far future (Issue #124)
 - Fixed input checks for `cupsCreateCredentials` and

doc/ipptransform.html

@@ -316,33 +316,45 @@ <h2 id="ipptransform-1.environment">Environment</h2>
     <p style="margin-left: 2.5em; text-indent: -2.5em;"><strong>IPP_xxx</strong><br>
 Specifies the value of the &quot;xxx&quot; Job Template attribute, where &quot;xxx&quot; is converted to uppercase.
 For example, the &quot;media&quot; Job Template attribute is stored as the &quot;IPP_MEDIA&quot; environment variable.
+When the source attribute contains multiple values, they are separated by commas in the environment variable string.
 </p>
     <p style="margin-left: 2.5em; text-indent: -2.5em;"><strong>IPP_xxx_DEFAULT</strong><br>
 Specifies the default value of the corresponding &quot;xxx-default&quot; Printer Description attribute, where &quot;xxx&quot; is converted to uppercase.
 For example, the &quot;media-default&quot; Printer Description attribute is stored as the &quot;IPP_MEDIA_DEFAULT&quot; environment variable.
+When the source attribute contains multiple values, they are separated by commas in the environment variable string.
+</p>
+    <p style="margin-left: 2.5em; text-indent: -2.5em;"><strong>IPP_xxx_READY</strong><br>
+Specifies the loaded value(s) of the corresponding &quot;xxx-ready&quot; Printer Status attribute, where &quot;xxx&quot; is converted to uppercase.
+For example, the &quot;media-ready&quot; Printer Status attribute is stored as the &quot;IPP_MEDIA_READY&quot; environment variable.
+When the source attribute contains multiple values, they are separated by commas in the environment variable string.
+</p>
+    <p style="margin-left: 2.5em; text-indent: -2.5em;"><strong>IPP_xxx_SUPPORTED</strong><br>
+Specifies the supported value(s) of the corresponding &quot;xxx-supported&quot; Printer Description attribute, where &quot;xxx&quot; is converted to uppercase.
+For example, the &quot;media-supported&quot; Printer Description attribute is stored as the &quot;IPP_MEDIA_SUPPORTED&quot; environment variable.
+When the source attribute contains multiple values, they are separated by commas in the environment variable string.
 </p>
     <p style="margin-left: 2.5em; text-indent: -2.5em;"><strong>IPP_PCLM_RASTER_BACK_SIDE</strong><br>
 Specifies the coordinate system of the back side of duplex sheets.
 The default is 'normal'.
 </p>
     <p style="margin-left: 2.5em; text-indent: -2.5em;"><strong>IPP_PCLM_SOURCE_RESOLUTION_SUPPORTED</strong><br>
-Lists the supported output resolutions.
+Lists the supported output resolutions, separated by commas.
 The default is 600dpi.
 </p>
     <p style="margin-left: 2.5em; text-indent: -2.5em;"><strong>IPP_PCLM_STRIP_HEIGHT_PREFERRED</strong><br>
 Specifies the preferred strip height for the printer.
 The default is 16.
 </p>
     <p style="margin-left: 2.5em; text-indent: -2.5em;"><strong>IPP_PWG_RASTER_DOCUMENT_RESOLUTION_SUPPORTED</strong><br>
-Lists the supported output resolutions.
+Lists the supported output resolutions, separated by commas.
 The default is 300dpi.
 </p>
     <p style="margin-left: 2.5em; text-indent: -2.5em;"><strong>IPP_PWG_RASTER_DOCUMENT_SHEET_BACK</strong><br>
 Specifies the coordinate system of the back side of duplex sheets.
 The default is 'normal'.
 </p>
     <p style="margin-left: 2.5em; text-indent: -2.5em;"><strong>IPP_PWG_RASTER_DOCUMENT_TYPE_SUPPORTED</strong><br>
-Lists the supported output color spaces and bit depths.
+Lists the supported output color spaces and bit depths, separated by commas.
 The default is 'sgray_8'.
 </p>
     <p style="margin-left: 2.5em; text-indent: -2.5em;"><strong>IPPTRANSFORM_MAX_RASTER</strong><br>
@@ -379,7 +391,7 @@ <h2 id="ipptransform-1.see-also">See Also</h2>
 
 </p>
     <h2 id="ipptransform-1.copyright">Copyright</h2>
-<p>Copyright &copy; 2023-2025 by OpenPrinting.
+<p>Copyright &copy; 2023-2026 by OpenPrinting.
 Copyright &copy; 2016-2019 by the Printer Working Group.
 Copyright &copy; 2016-2019 by Apple Inc.
   </body>

man/ipptransform.1

@@ -1,14 +1,14 @@
 .\"
 .\" ipptransform man page.
 .\"
-.\" Copyright © 2023-2025 by OpenPrinting.
+.\" Copyright © 2023-2026 by OpenPrinting.
 .\" Copyright © 2016-2019 by the Printer Working Group.
 .\" Copyright © 2016-2019 by Apple Inc.
 .\"
 .\" Licensed under Apache License v2.0.  See the file "LICENSE" for more
 .\" information.
 .\"
-.TH ipptransform 1 "ippsample" "2025-11-24" "OpenPrinting"
+.TH ipptransform 1 "ippsample" "2026-01-08" "OpenPrinting"
 .SH NAME
 ipptransform \- convert document data to alternate formats
 .br
@@ -221,33 +221,45 @@ Specifies the title of the input file.
 .B IPP_xxx
 Specifies the value of the "xxx" Job Template attribute, where "xxx" is converted to uppercase.
 For example, the "media" Job Template attribute is stored as the "IPP_MEDIA" environment variable.
+When the source attribute contains multiple values, they are separated by commas in the environment variable string.
 .TP 5
 .B IPP_xxx_DEFAULT
 Specifies the default value of the corresponding "xxx-default" Printer Description attribute, where "xxx" is converted to uppercase.
 For example, the "media-default" Printer Description attribute is stored as the "IPP_MEDIA_DEFAULT" environment variable.
+When the source attribute contains multiple values, they are separated by commas in the environment variable string.
+.TP 5
+.B IPP_xxx_READY
+Specifies the loaded value(s) of the corresponding "xxx-ready" Printer Status attribute, where "xxx" is converted to uppercase.
+For example, the "media-ready" Printer Status attribute is stored as the "IPP_MEDIA_READY" environment variable.
+When the source attribute contains multiple values, they are separated by commas in the environment variable string.
+.TP 5
+.B IPP_xxx_SUPPORTED
+Specifies the supported value(s) of the corresponding "xxx-supported" Printer Description attribute, where "xxx" is converted to uppercase.
+For example, the "media-supported" Printer Description attribute is stored as the "IPP_MEDIA_SUPPORTED" environment variable.
+When the source attribute contains multiple values, they are separated by commas in the environment variable string.
 .TP 5
 .B IPP_PCLM_RASTER_BACK_SIDE
 Specifies the coordinate system of the back side of duplex sheets.
 The default is 'normal'.
 .TP 5
 .B IPP_PCLM_SOURCE_RESOLUTION_SUPPORTED
-Lists the supported output resolutions.
+Lists the supported output resolutions, separated by commas.
 The default is 600dpi.
 .TP 5
 .B IPP_PCLM_STRIP_HEIGHT_PREFERRED
 Specifies the preferred strip height for the printer.
 The default is 16.
 .TP 5
 .B IPP_PWG_RASTER_DOCUMENT_RESOLUTION_SUPPORTED
-Lists the supported output resolutions.
+Lists the supported output resolutions, separated by commas.
 The default is 300dpi.
 .TP 5
 .B IPP_PWG_RASTER_DOCUMENT_SHEET_BACK
 Specifies the coordinate system of the back side of duplex sheets.
 The default is 'normal'.
 .TP 5
 .B IPP_PWG_RASTER_DOCUMENT_TYPE_SUPPORTED
-Lists the supported output color spaces and bit depths.
+Lists the supported output color spaces and bit depths, separated by commas.
 The default is 'sgray_8'.
 .TP 5
 .B IPPTRANSFORM_MAX_RASTER
@@ -283,6 +295,6 @@ Convert a JPEG file to sRGB PWG Raster at 600dpi:
 .SH SEE ALSO
 .BR ipptool (1),
 .SH COPYRIGHT
-Copyright \[co] 2023-2025 by OpenPrinting.
+Copyright \[co] 2023-2026 by OpenPrinting.
 Copyright \[co] 2016-2019 by the Printer Working Group.
 Copyright \[co] 2016-2019 by Apple Inc.