take 1

appveyor.yml

@@ -6,6 +6,7 @@ environment:
   LIBEXPAT: C:\projects\libexpat
   LIBAVIF: C:\projects\libavif
   LIBEXIV2: C:\projects\exiv2
+  LIBHEIF: C:\projects\libheif
   PPKG: C:\projects\ppkg
   matrix:
     - job_name: mingw_64_qt6_5
@@ -31,6 +32,7 @@ install:
   - mkdir %LIBEXPAT%
   - mkdir %LIBAVIF%
   - mkdir %LIBEXIV2%
+  - mkdir %LIBHEIF%
   - mkdir %PPKG%
   - cd %APPVEYOR_BUILD_FOLDER%
   - git submodule update --init --recursive
@@ -121,6 +123,15 @@ build_script:
   - cmake --build . --config Release
   - cmake --build . --config Release --target install/strip
   - cd %APPVEYOR_BUILD_FOLDER%
+# install libheif for heif format support of KImageFormats
+  - cd %LIBHEIF%
+  - curl -fsSL -o libheif-v1.17.6.zip https://github.com/strukturag/libheif/archive/v1.17.6.zip
+  - 7z x libheif-v1.17.6.zip -y
+  - cd libheif-1.17.6
+  - cmake . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=%CMAKE_INSTALL_PREFIX%
+  - cmake --build build --config Release
+  - cmake --build build --config Release --target install/strip
+  - cd %APPVEYOR_BUILD_FOLDER%
 # install KArchive for kra format support of KImageFormats
   - cd 3rdparty
   - git clone -b %KF_BRANCH% -q https://invent.kde.org/frameworks/karchive.git