AnyImageConverter: recognize WebP files.

doc/changelog.dox

@@ -871,6 +871,7 @@ See also:
     [mosra/magnum#529](https://github.com/mosra/magnum/pull/529))
 -   Recognizing KTX2 for (compressed) 1D/2D/3D and multi-level 1D/2D/3D images
     in @relativeref{Trade,AnyImageConverter}
+-   Recognizing WebP files in @relativeref{Trade,AnyImageConverter}
 -   Recognizing glTF files in @relativeref{Trade,AnySceneConverter}
 -   Recognizing 3MF files in @relativeref{Trade,AnySceneImporter}
 -   Recognizing OpenVBD files in @relativeref{Trade,AnyImageImporter} and

src/MagnumPlugins/AnyImageConverter/AnyImageConverter.cpp

@@ -132,6 +132,8 @@ bool AnyImageConverter::doConvertToFile(const ImageView2D& image, const Containe
             normalizedExtension == ".icb"_s ||
             normalizedExtension ==  ".vst"_s)
         plugin = "TgaImageConverter"_s;
+    else if(normalizedExtension == ".webp"_s)
+        plugin = "WebPImageConverter"_s;
     else {
         Error{} << "Trade::AnyImageConverter::convertToFile(): cannot determine the format of" << filename << "for a 2D image";
         return false;

src/MagnumPlugins/AnyImageConverter/AnyImageConverter.h

@@ -78,6 +78,8 @@ tries to convert the file with it. Supported formats:
     uncompressed 2D images.
 -   OpenVDB (`*.vdb`), converted with any plugin that provides
     `OpenVdbImageConverter`. Only uncompressed 3D images.
+-   WebP (`*.webp`), converted with @ref WebPImageConverter or any other plugin
+    that provides it. Only uncompressed 2D images.
 
 As the converter plugin is picked based on file extension, only saving to files
 is supported.

src/MagnumPlugins/AnyImageConverter/Test/AnyImageConverterTest.cpp

@@ -161,7 +161,8 @@ constexpr struct {
     /* Have at least one test case with uppercase */
     {"JPEG uppercase", "output.JPG", "JpegImageConverter"},
     {"KTX2", "foo.ktx2", "KtxImageConverter"},
-    {"PNG", "file.png", "PngImageConverter"}
+    {"PNG", "file.png", "PngImageConverter"},
+    {"WebP", "file.webp", "WebPImageConverter"}
 };
 
 constexpr struct {