{scene,image}converter: add examples for the new features.

doc/snippets/imageconverter-info-converter.ansi

@@ -0,0 +1,16 @@
+Plugin name: StbResizeImageConverter
+Features:
+  Convert2D
+  Convert3D
+Configuration:
+  # Target width and height, separated by a space. Required.
+  size=512 512
+
+  # How neighboring pixel values are retrieved on image edges. Valid values
+  # are:
+  #  - clamp -- as if the edge pixels were extended
+  #  - wrap -- as if the image was repeated
+  #  - reflect -- as if the image was repeated and reflected
+  #  - zero -- uses zero values for out-of-bounds pixels
+  edge=clamp
+…

doc/snippets/sceneconverter-info-converter.ansi

@@ -0,0 +1,24 @@
+Plugin name: GltfSceneConverter
+Features:
+  ConvertMultipleToData
+  AddScenes
+  AddMeshes
+  AddMaterials
+  AddTextures
+  AddImages2D
+  AddCompressedImages2D
+Configuration:
+  # Copyright and generator name, written into the asset object. If empty, no
+  # value is written.
+  copyright=Me & Myself
+  generator=Magnum GltfSceneConverter
+
+  # Add one or more extensionUsed and/or extensionRequired values to populate
+  # the extension usage and requirement arrays.
+
+  # Whether to write a *.gltf or a *.glb file. If empty, detected automatically
+  # based on filename extension, conversion to data defaults to a binary file.
+  # If a text file is selected for conversion to data, converting anything that
+  # involves binary buffers will currently fail.
+  binary=
+…

src/Magnum/SceneTools/sceneconverter.cpp

@@ -94,24 +94,83 @@ magnum-sceneconverter --info Box.gltf
 
 @endparblock
 
-Converting an OBJ file to a PLY, implicitly using
+Converting an OBJ file to a glTF, implicitly using
 @relativeref{Trade,AnySceneConverter} that delegates to
-@relativeref{Trade,StanfordSceneConverter} or
-@ref file-formats "any other plugin capable of PLY export" depending on what's
+@relativeref{Trade,GltfSceneConverter} or
+@ref file-formats "any other plugin capable of glTF export" depending on what's
 available:
 
 @code{.sh}
-magnum-sceneconverter chair.obj chair.ply
+magnum-sceneconverter chair.obj chair.gltf
 @endcode
 
-Processing an OBJ file with @relativeref{Trade,MeshOptimizerSceneConverter},
-setting @ref Trade-MeshOptimizerSceneConverter-configuration "plugin-specific configuration options"
-to reduce the index count to half, saving as a PLY, with verbose output showing
-the processing stats:
+Extracting a single mesh from a glTF to a PLY file, implicitly delegated to
+@relativeref{Trade,StanfordSceneConverter}, for closer inspection:
 
 @code{.sh}
-magnum-sceneconverter chair.obj -C MeshOptimizerSceneConverter \
-    -c simplify=true,simplifyTargetIndexCountThreshold=0.5 chair.ply -v
+magnum-sceneconverter scene.gltf --mesh 17 mesh17.ply
+@endcode
+
+Repacking a glTF and encoding all its images as Basis UASTC with
+@relativeref{Trade,BasisImageConverter} using the @cb{.ini} imageConverter @ce
+@ref Trade-GltfSceneConverter-configuration "option of GltfSceneConverter":
+
+@code{.sh}
+magnum-sceneconverter scene.gltf scene.basis.gltf \
+    -c imageConverter=BasisKtxImageConverter,imageConverter/uastc
+@endcode
+
+Printing features and documented options of a particular scene converter
+plugin. For debugging convenience the printed configuration file will reflect
+also all options specified via `-c`:
+
+@m_class{m-code-figure}
+
+@parblock
+
+@code{.sh}
+magnum-sceneconverter --info-converter -C GltfSceneConverter -c copyright="Me & Myself"
+@endcode
+
+<b></b>
+
+@m_class{m-nopad}
+
+@include sceneconverter-info-converter.ansi
+
+@endparblock
+
+@subsection magnum-sceneconverter-example-image-mesh-conversion Performing operations on all images and meshes in the file
+
+Processing a glTF file and removing duplicates in all its meshes:
+
+@code{.sh}
+magnum-sceneconverter scene.gltf --remove-duplicates scene.deduplicated.gltf
+@endcode
+
+Processing a glTF file, resizing all its images to 512x512 with
+@relativeref{Trade,StbResizeImageConverter}, block-compressing their data to a
+BC3 using @relativeref{Trade,StbDxtImageConverter} with high-quality output and
+saving them in a KTX2 container with @relativeref{Trade,KtxImageConverter} and
+an experimental [KHR_texture_ktx](https://github.com/KhronosGroup/glTF/pull/1964)
+glTF extension:
+
+@code{.sh}
+magnum-sceneconverter scene.gltf scene.dxt.gltf \
+    -P StbResizeImageConverter -p size="512 512" \
+    -P StbDxtImageConverter -p highQuality \
+    -c imageConverter=KtxImageConverter,experimentalKhrTextureKtx
+@endcode
+
+Processing a glTF file and decimating all its meshes to a half size with
+@relativeref{Trade,MeshOptimizerSceneConverter}, with verbose output showing
+the processing stats. The `-M` / `-m` options can be chained the same way as
+`-P` / `-p` above, if needed:
+
+@code{.sh}
+magnum-sceneconverter scene.gltf scene.decimated.gltf \
+    -M MeshOptimizerSceneConverter \
+    -m simplify,simplifyTargetIndexCountThreshold=0.5 -v
 @endcode
 
 @section magnum-sceneconverter-usage Full usage documentation

src/Magnum/Trade/imageconverter.cpp

@@ -128,7 +128,7 @@ the @relativeref{Trade,GltfImporter}. First printing a list of images to choose
 @parblock
 
 @code{.sh}
-magnum-imageconverter -I AnySceneImporter --info file.gltf
+magnum-imageconverter -I GltfImporter --info file.gltf
 @endcode
 
 <b></b>
@@ -141,22 +141,45 @@ magnum-imageconverter -I AnySceneImporter --info file.gltf
 
 @m_class{m-noindent}
 
-and then extracting the third image to a PNG file for inspection:
+... and then extracting the third image to a PNG file for inspection:
 
 @code{.sh}
-magnum-imageconverter -I AnySceneImporter --image 2 file.gltf image.png
+magnum-imageconverter -I GltfImporter --image 2 file.gltf image.png
 @endcode
 
-Converting a PNG file to a KTX2, block-compressing the data to BC3 using
-@relativeref{Trade,StbDxtImageConverter} and enabling a high-quality output.
+Converting a PNG file to a KTX2, resizing it to 512x512 with
+@relativeref{Trade,StbResizeImageConverter}, block-compressing its data to BC3
+using @relativeref{Trade,StbDxtImageConverter} with high-quality output.
 Because the plugin implements image-to-image conversion, the  @relativeref{Trade,AnyImageConverter} plugin is implicitly used after it,
 proxying to @relativeref{Trade,KtxImageConverter} as the `*.ktx2` extension was
 chosen:
 
 @code{.sh}
-magnum-imageconverter image.png -C StbDxtImageConverter -c highQuality image.ktx2
+magnum-imageconverter image.png image.ktx2 \
+    -C StbResizeImageConverter -c size="512 512" \
+    -C StbDxtImageConverter -c highQuality
 @endcode
 
+Printing features and documented options of a particular image converter
+plugin. For debugging convenience the printed configuration file will reflect
+also all options specified via `-c`:
+
+@m_class{m-code-figure}
+
+@parblock
+
+@code{.sh}
+magnum-imageconverter --info-converter -C StbResizeImageConverter -c size="512 512"
+@endcode
+
+<b></b>
+
+@m_class{m-nopad}
+
+@include imageconverter-info-converter.ansi
+
+@endparblock
+
 @subsection magnum-imageconverter-example-levels-layers Dealing with image levels and layers
 
 Converting six 2D images to a 3D cube map file using @relativeref{Trade,OpenExrImageConverter}. Note the `-c envmap-cube` which the