godot/modules/basis_universal/SCsub

#!/usr/bin/env python
from misc.utility.scons_hints import *

Import("env")
Import("env_modules")

env_basisu = env_modules.Clone()

# Thirdparty source files

thirdparty_obj = []

# Not unbundled so far since not widespread as shared library
thirdparty_dir = "#thirdparty/basis_universal/"

# Only build the encoder for editor builds
basisu_encoder = env.editor_build

# Sync list with upstream CMakeLists.txt
if basisu_encoder:
    encoder_sources = [
        "3rdparty/android_astc_decomp.cpp",
        "basisu_astc_hdr_enc.cpp",
        "basisu_backend.cpp",
        "basisu_basis_file.cpp",
        "basisu_bc7enc.cpp",
        "basisu_opencl.cpp",
        "basisu_comp.cpp",
        "basisu_enc.cpp",
        "basisu_etc.cpp",
        "basisu_frontend.cpp",
        "basisu_gpu_texture.cpp",
        "basisu_kernels_sse.cpp",
        "basisu_pvrtc1_4.cpp",
        "basisu_resampler.cpp",
        "basisu_resample_filters.cpp",
        "basisu_ssim.cpp",
        "basisu_uastc_enc.cpp",
        "pvpngreader.cpp",
    ]
    encoder_sources = [thirdparty_dir + "encoder/" + file for file in encoder_sources]

transcoder_sources = [thirdparty_dir + "transcoder/basisu_transcoder.cpp"]

# Treat Basis headers as system headers to avoid raising warnings. Not supported on MSVC.
if not env.msvc:
    env_basisu.Append(CPPFLAGS=["-isystem", Dir(thirdparty_dir).path])
else:
    env_basisu.Prepend(CPPPATH=[thirdparty_dir])

if basisu_encoder:
    env_basisu.Prepend(CPPPATH=["#thirdparty/jpeg-compressor"])
    env_basisu.Prepend(CPPPATH=["#thirdparty/tinyexr"])

if env["builtin_zstd"]:
    env_basisu.Prepend(CPPPATH=["#thirdparty/zstd"])

env_thirdparty = env_basisu.Clone()
env_thirdparty.disable_warnings()

# Disable unneeded features to reduce binary size.
# <https://github.com/BinomialLLC/basis_universal/wiki/How-to-Use-and-Configure-the-Transcoder>
env_thirdparty.Append(
    CPPDEFINES=[
        # Storage formats.
        # Godot only implements `.basis` support through basis_universal.
        # Support for `.ktx` files are implemented with a direct libktx implementation.
        # Building the encoder requires `BASISD_SUPPORT_KTX2` to be enabled,
        # so we can only disable Zstandard compression for `.ktx` files
        # (this is not used in `.basis` files).
        ("BASISD_SUPPORT_KTX2_ZSTD", 0),
        # GPU compression formats.
        ("BASISD_SUPPORT_ATC", 0),  # Proprietary Adreno format not supported by Godot.
        ("BASISD_SUPPORT_FXT1", 0),  # Legacy format not supported by Godot.
        ("BASISD_SUPPORT_PVRTC1", 0),  # Legacy format not supported by Godot.
        ("BASISD_SUPPORT_PVRTC2", 0),  # Legacy format not supported by Godot.
    ]
)

if basisu_encoder:
    env_thirdparty.add_source_files(thirdparty_obj, encoder_sources)

env_thirdparty.add_source_files(thirdparty_obj, transcoder_sources)
env.modules_sources += thirdparty_obj

# Godot source files

module_obj = []

env_basisu.add_source_files(module_obj, "*.cpp")
env.modules_sources += module_obj

# Needed to force rebuilding the module files when the thirdparty library is updated.
env.Depends(module_obj, thirdparty_obj)