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emscripten-core
GitHub Repository: emscripten-core/emscripten
 Path: blob/main/tools/ports/sdl2_image.py
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# Copyright 2014 The Emscripten Authors.  All rights reserved.

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# Emscripten is available under two separate licenses, the MIT license and the

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# University of Illinois/NCSA Open Source License.  Both these licenses can be

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# found in the LICENSE file.

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from typing import Dict, Set

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TAG = 'release-2.6.0'

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HASH = '2175d11a90211871f2289c8d57b31fe830e4b46af7361925c2c30cd521c1c677d2ee244feb682b6d3909cf085129255934751848fc81b480ea410952d990ffe0'

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deps = ['sdl2']

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variants = {

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  'sdl2_image-jpg':    {'SDL2_IMAGE_FORMATS': ["jpg"]},

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  'sdl2_image-png':    {'SDL2_IMAGE_FORMATS': ["png"]},

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  'sdl2_image-jpg-mt': {'SDL2_IMAGE_FORMATS': ["jpg"], 'PTHREADS': 1},

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  'sdl2_image-png-mt': {'SDL2_IMAGE_FORMATS': ["png"], 'PTHREADS': 1},

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}

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OPTIONS = {

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  'formats': 'A comma separated list of formats (ex: --use-port=sdl2_image:formats=png,jpg)',

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}

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SUPPORTED_FORMATS = {'bmp', 'gif', 'jpg', 'lbm', 'pcx', 'png',

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                     'pnm', 'qoi', 'svg', 'tga', 'xcf', 'xpm', 'xv'}

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# user options (from --use-port)

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opts: Dict[str, Set] = {

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  'formats': set(),

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}

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def needed(settings):

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  return settings.USE_SDL_IMAGE == 2

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def get_formats(settings):

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  return opts['formats'].union(settings.SDL2_IMAGE_FORMATS)

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def get_lib_name(settings):

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  formats = '-'.join(sorted(get_formats(settings)))

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  libname = 'libSDL2_image'

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  if formats != '':

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    libname += '-' + formats

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  if settings.PTHREADS:

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    libname += '-mt'

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  if settings.SUPPORT_LONGJMP == 'wasm':

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    libname += '-wasm-sjlj'

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  return libname + '.a'

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def get(ports, settings, shared):

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  ports.fetch_project('sdl2_image', f'https://github.com/libsdl-org/SDL_image/archive/refs/tags/{TAG}.zip', sha512hash=HASH)

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  libname = get_lib_name(settings)

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  def create(final):

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    src_dir = ports.get_dir('sdl2_image', 'SDL_image-' + TAG)

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    ports.install_headers(src_dir, target='SDL2')

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    srcs = '''IMG.c IMG_bmp.c IMG_gif.c IMG_jpg.c IMG_lbm.c IMG_pcx.c IMG_png.c IMG_pnm.c IMG_tga.c

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              IMG_tif.c IMG_xcf.c IMG_xpm.c IMG_xv.c IMG_webp.c IMG_ImageIO.m

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              IMG_avif.c IMG_jxl.c IMG_svg.c IMG_qoi.c'''.split()

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    flags = ['-sUSE_SDL=2', '-Wno-format-security']

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    formats = get_formats(settings)

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    flags.extend(f'-DLOAD_{fmt.upper()}' for fmt in formats)

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    if 'png' in formats:

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      flags += ['-sUSE_LIBPNG']

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    if 'jpg' in formats:

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      flags += ['-sUSE_LIBJPEG']

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    if settings.PTHREADS:

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      flags += ['-pthread']

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    if settings.SUPPORT_LONGJMP == 'wasm':

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      flags.append('-sSUPPORT_LONGJMP=wasm')

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    ports.build_port(src_dir, final, 'sdl2_image', flags=flags, srcs=srcs)

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  return [shared.cache.get_lib(libname, create, what='port')]

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def clear(ports, settings, shared):

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  shared.cache.erase_lib(get_lib_name(settings))

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def process_dependencies(settings):

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  settings.USE_SDL = 2

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  formats = get_formats(settings)

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  if 'png' in formats:

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    deps.append('libpng')

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    settings.USE_LIBPNG = 1

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  if 'jpg' in formats:

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    deps.append('libjpeg')

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    settings.USE_LIBJPEG = 1

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def handle_options(options, error_handler):

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  formats = options['formats'].split(',')

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  for format in formats:

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    format = format.lower().strip()

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    if format not in SUPPORTED_FORMATS:

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      error_handler(f'{format} is not a supported format')

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    else:

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      opts['formats'].add(format)

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def show():

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  return 'sdl2_image (-sUSE_SDL_IMAGE=2 or --use-port=sdl2_image; zlib license)'

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