Update GroupDocs.Conversion for Python via .NET to 26.9.0

Author: vladimir-litvinchik

.github/workflows/run-examples.yml

@@ -26,7 +26,7 @@ jobs:
         run: |
           sudo apt-get update -qq
           echo "ttf-mscorefonts-installer msttcorefonts/accepted-mscorefonts-eula select true" | sudo debconf-set-selections
-          sudo apt-get install -y --no-install-recommends libicu-dev libgdiplus ttf-mscorefonts-installer
+          sudo apt-get install -y --no-install-recommends libicu-dev fontconfig ttf-mscorefonts-installer
 
       - name: Install package
         run: pip install -r Examples/requirements.txt

AGENTS.md

@@ -324,8 +324,8 @@ Use `FileType.from_extension("json")` when you don't know which subclass owns a
 | Platform | Requirements |
 |---|---|
 | Windows | None |
-| Linux | `apt install libgdiplus libfontconfig1 ttf-mscorefonts-installer` |
-| macOS | `brew install mono-libgdiplus` |
+| Linux | `apt install libicu-dev fontconfig ttf-mscorefonts-installer` |
+| macOS | None |
 
 ## Troubleshooting
 
@@ -350,10 +350,6 @@ with Converter("input.vss") as c:
     print(c.get_possible_conversions().all)
 ```
 
-**`System.Drawing.Common is not supported`** -- install libgdiplus: `sudo apt install libgdiplus` (Linux) / `brew install mono-libgdiplus` (macOS)
-
-**`Gdip` type initializer exception** -- outdated libgdiplus: `brew reinstall mono-libgdiplus` (macOS)
-
 **Garbled text / missing fonts** -- install fonts: `sudo apt install ttf-mscorefonts-installer fontconfig && sudo fc-cache -f`
 
 **`DllNotFoundException: libSkiaSharp`** -- stale system copy conflicts with bundled version. Rename it: `sudo mv /usr/local/lib/libSkiaSharp.dylib /usr/local/lib/libSkiaSharp.dylib.bak`

Dockerfile

@@ -2,14 +2,19 @@ FROM python:3.13-slim
 
 # System dependencies required by the .NET runtime:
 # - libicu-dev: ICU for .NET globalization
-# - libgdiplus: GDI+ for System.Drawing (image conversions)
 # - fontconfig + fonts-liberation: font cache tooling plus metric-compatible
 #   substitutes for Arial/Times/Courier
 # - ttf-mscorefonts-installer: the actual Microsoft core fonts (Arial etc.),
 #   which the conversion engine looks up by name for watermarks and text
 #   rendering. It lives in Debian "contrib" (not enabled on the slim base
 #   image), so that component is enabled first; the debconf line pre-accepts
 #   its EULA and wget is needed for its font download.
+#
+# libgdiplus is deliberately NOT installed. Up to 26.5 the engine depended on
+# System.Drawing.Common, which needs GDI+; from 26.9 (engine 26.8, .NET 10) the
+# cross-platform build drops that dependency for SkiaSharp + Aspose.Drawing, and
+# the Linux wheel ships no System.Drawing.Common.dll at all. Measured in this
+# image: with libgdiplus present and absent the results are identical.
 RUN set -eux; \
     if [ -f /etc/apt/sources.list.d/debian.sources ]; then \
         sed -i 's/^Components: main$/Components: main contrib/' /etc/apt/sources.list.d/debian.sources; \
@@ -19,7 +24,7 @@ RUN set -eux; \
     apt-get update -qq; \
     echo "ttf-mscorefonts-installer msttcorefonts/accepted-mscorefonts-eula select true" | debconf-set-selections; \
     apt-get install -y --no-install-recommends \
-        libicu-dev libgdiplus fontconfig fonts-liberation wget ttf-mscorefonts-installer; \
+        libicu-dev fontconfig fonts-liberation wget ttf-mscorefonts-installer; \
     fc-cache -f; \
     rm -rf /var/lib/apt/lists/*