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add SDL3_image meson files
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‎external/sources/SDL3_image-3.2.4/meson.build‎

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project('sdl3_image', 'c', version: '3.2.4')
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cc = meson.get_compiler('c')
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sdl3_dep = dependency('sdl3', version: '>=3.2.4')
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deps = [sdl3_dep]
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inc = include_directories('include')
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feature_args = []
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extra_library_args = []
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if host_machine.system() == 'windows' and get_option('default_library') != 'static'
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extra_library_args += '-DDLL_EXPORT'
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endif
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# These are enabled by default it seems.
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#img_args = ['-DWANT_LIBPNG']
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#if jpg_dep.found()
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# img_args += '-DWANT_JPEGLIB'
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#endif
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# Backends provide support for certain formats, allowing not to depend on external library or use potentially better optimized algorithm
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backend_provided_loaders = []
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use_imageio_backend = get_option('use_imageio').require(
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host_machine.system() == 'darwin',
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error_message: 'Image I/O backend is exclusive to MacOS',
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).allowed()
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use_wic_backend = get_option('use_wic').require(
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host_machine.system() == 'windows',
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error_message: 'WIC backend is exclusive to Windows',
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).allowed()
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native_backend_present = use_imageio_backend or use_wic_backend
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# In meson 1.1.0+ this can be done using .disable_auto_if(native_backend_present).enabled()
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use_stbimage_backend = native_backend_present ? get_option('use_stbimage').enabled() : get_option(
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'use_stbimage',
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).allowed()
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if use_stbimage_backend
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feature_args += '-DUSE_STBIMAGE'
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backend_provided_loaders += ['png', 'jpg']
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endif
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subdir('src')
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full_library_args = [feature_args, extra_library_args]
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img_lib = library(
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'sdl3_image',
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src,
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c_args: full_library_args,
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objc_args: full_library_args,
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include_directories: inc,
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gnu_symbol_visibility: 'hidden',
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dependencies: deps,
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)
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sdl3_image_dep = declare_dependency(
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include_directories: inc,
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link_with: img_lib,
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)

‎external/sources/SDL3_image-3.2.4/meson_options.txt‎

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option(
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'force_builtin_bmp',
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type: 'boolean',
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value: true,
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description: 'Do not use backend-provided BMP loaders. Potentially slower but pixel-perfect. Recommended for tests.',
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)
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# Backends
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option(
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'use_stbimage',
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type: 'feature',
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description: 'Use stb_image for JPEG and PNG',
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)
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option(
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'use_imageio',
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type: 'feature',
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description: 'Use Image I/O framework for supported formats',
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)
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option(
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'use_wic',
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type: 'feature',
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# It is disabled by default in upstream build system, plus CI fails to load WIC
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value: 'disabled',
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description: 'Use WIC (Windows Imaging Component) for supported formats',
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)
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# Image loaders that may require external library (some can be provided by backends instead)
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option(
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'jpg',
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type: 'feature',
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description: 'Support loading JPEG images',
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)
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option(
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'jpg_save',
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type: 'feature',
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description: 'Support saving JPEG images',
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)
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option(
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'png',
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type: 'feature',
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description: 'Support loading PNG images',
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)
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option(
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'png_save',
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type: 'feature',
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description: 'Support saving PNG images',
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)
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option(
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'avif',
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type: 'feature',
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description: 'Support loading AVIF images',
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)
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option(
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'avif_save',
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type: 'feature',
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description: 'Support saving AVIF images',
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)
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option(
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'jxl',
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type: 'feature',
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description: 'Support loading JXL images',
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)
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option(
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'tif',
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type: 'feature',
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description: 'Support loading TIFF images',
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)
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option(
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'webp',
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type: 'feature',
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description: 'Support loading WEBP images',
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)
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# Image loaders that never require external libraries
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option(
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'bmp',
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type: 'feature',
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description: 'Support loading BMP images',
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)
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option(
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'gif',
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type: 'feature',
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description: 'Support loading GIF images',
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)
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option(
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'lbm',
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type: 'feature',
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description: 'Support loading LBM images',
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)
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option(
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'pcx',
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type: 'feature',
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description: 'Support loading PCX images',
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)
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option(
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'pnm',
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type: 'feature',
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description: 'Support loading PNM images',
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)
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option(
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'qoi',
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type: 'feature',
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description: 'Support loading QOI images',
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)
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option(
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'svg',
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type: 'feature',
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description: 'Support loading SVG images',
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)
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option(
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'tga',
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type: 'feature',
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description: 'Support loading TGA images',
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)
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option(
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'xcf',
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type: 'feature',
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description: 'Support loading XCF images',
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)
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option(
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'xpm',
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type: 'feature',
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description: 'Support loading XPM images',
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)
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option(
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'xv',
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type: 'feature',
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description: 'Support loading XV images',
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)
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‎external/sources/SDL3_image-3.2.4/src/meson.build‎

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# Files that are not directly tied to loaders
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src = files('IMG.c', 'IMG_WIC.c', 'IMG_stb.c')
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if use_imageio_backend
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add_languages(
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'objc',
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native: false,
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)
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src += files('IMG_ImageIO.m')
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deps += dependency(
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'appleframeworks',
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modules: ['ApplicationServices'],
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)
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imageio_provided_formats = ['png', 'jpg', 'tif', 'gif', 'tga']
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if not get_option('force_builtin_bmp')
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imageio_provided_formats += 'bmp'
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endif
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foreach format_name : imageio_provided_formats
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if format_name not in backend_provided_loaders
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feature_args += '-D@0@_USES_IMAGEIO'.format(format_name.to_upper())
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endif
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endforeach
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backend_provided_loaders += imageio_provided_formats
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endif
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if not use_imageio_backend and host_machine.system() == 'darwin'
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feature_args += '-DSDL_IMAGE_USE_COMMON_BACKEND'
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endif
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if use_wic_backend
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feature_args += '-DSDL_IMAGE_USE_WIC_BACKEND'
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deps += cc.find_library('windowscodecs')
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backend_provided_loaders += ['png', 'jpg', 'tif']
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endif
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summary(
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{
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'stb_image': use_stbimage_backend,
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'Image I/O': use_imageio_backend,
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'Windows Imaging Component': use_wic_backend,
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},
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section: 'Backends',
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)
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# Loaders that don't depend on anything
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self_contained_loaders = [
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'bmp',
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'gif',
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'lbm',
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'pcx',
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'pnm',
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'qoi',
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'svg',
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'tga',
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'xcf',
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'xpm',
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'xv',
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]
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foreach format_name : self_contained_loaders
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src += files('IMG_@0@.c'.format(format_name))
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if get_option(format_name).allowed()
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feature_args += '-DLOAD_@0@'.format(format_name.to_upper())
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summary(
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format_name,
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format_name in backend_provided_loaders ? 'handled by backend' : 'built-in loader',
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section: 'Formats',
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)
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else
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summary(
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format_name,
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'disabled',
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section: 'Formats',
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)
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endif
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endforeach
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# Loaders that depend on external libraries
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external_dep_loaders = {
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'avif': ['libavif'],
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'jpg': ['libjpeg'],
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'jxl': ['libjxl'],
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'png': ['libpng'],
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'tif': ['libtiff-4'],
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'webp': ['libwebp', 'libwebpdemux'],
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}
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foreach format_name, library_names : external_dep_loaders
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src += files('IMG_@0@.c'.format(format_name))
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if format_name in backend_provided_loaders
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if get_option(format_name).allowed()
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feature_args += '-DLOAD_@0@'.format(format_name.to_upper())
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summary(
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format_name,
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'handled by backend',
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section: 'Formats',
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)
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else
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summary(
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format_name,
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'disabled',
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section: 'Formats',
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)
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endif
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else
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summary_name = format_name
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summary_value = 'handled by ' + ', '.join(library_names)
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foreach lib_name : library_names
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loader_library = dependency(
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lib_name,
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required: get_option(format_name),
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)
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if loader_library.found()
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deps += loader_library
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feature_args += '-DLOAD_@0@'.format(format_name.to_upper())
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else
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summary_value = 'disabled'
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endif
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endforeach
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summary(
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summary_name,
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summary_value,
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section: 'Formats',
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)
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endif
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endforeach
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jpg_save_support = get_option('jpg_save').allowed()
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feature_args += '-DSDL_IMAGE_SAVE_JPG=@0@'.format(jpg_save_support.to_int())
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png_save_support = get_option('png_save').allowed()
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feature_args += '-DSDL_IMAGE_SAVE_PNG=@0@'.format(png_save_support.to_int())
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avif_save_support = get_option('avif_save').allowed()
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feature_args += '-DSDL_IMAGE_SAVE_AVIF=@0@'.format(png_save_support.to_int())
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summary(
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{
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'jpg': jpg_save_support,
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'png': png_save_support,
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'avif': avif_save_support,
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},
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section: 'Image saving support',
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)

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