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@shybovycha
I encountered this issue while testing the usage:

1> [CMake] CMake Error at D:/vcpkg/installed/x64-windows/share/SDL3_image/SDL3_image-shared-targets.cmake:60 (set_target_properties):
1> [CMake]   The link interface of target "SDL3_image::SDL3_image-shared" contains:
1> [CMake] 
1> [CMake]     SDL3::Headers
1> [CMake] 
1> [CMake]   but the target was not found.  Possible reasons include:
1> [CMake] 
1> [CMake]     * There is a typo in the target name.
1> [CMake]     * A find_package call is missing for an IMPORTED target.
1> [CMake]     * An ALIAS target is missing.

@Mengna-Li i can confirm this happens. apparently, SDL3-image requires SDL3:

if(NOT TARGET SDL3::Headers OR NOT TARGET ${sdl3_target_name})
    find_package(SDL3 ${SDL_REQUIRED_VERSION} REQUIRED COMPONENTS ${sdl_required_components})
endif()

which would require a separate dependency entry in both vcpkg.json and a separate find_package(SDL3 CONFIG REQUIRED) call in CMakeLists.txt. not sure what's the best approach here would be - some addition to the usage file or an implicit patch to the portfile (to add SDL3 and a call to find_package under the hood when SDL3-image is added to a project)?

(to add SDL3 and a call to find_package under the hood when SDL3-image is added to a project)?

I think this way is better.

Note: I will be converting your PR to draft status. When you're ready, please revert to "ready for review". That way, I can be aware that you've responded since you can't modify the tags.

@Mengna-Li i have added the SDL3 dependency to the cmake/SDL3_imageConfig.cmake.in file in SDL3 code so now the explicit dependency on SDL3 is not required

Usage tested pass on x64-windows.