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{ lib
, stdenv
, fetchFromGitHub
, cmake
, simdExtensions ? null
}:
with rec {
# SIMD instruction sets to compile for. If none are specified by the user,
# an appropriate one is selected based on the detected host system
isas = with stdenv.hostPlatform;
if simdExtensions != null then lib.toList simdExtensions
else if avx2Support then [ "AVX2" ]
else if sse4_1Support then [ "SSE41" ]
else if isx86_64 then [ "SSE2" ]
else if isAarch64 then [ "NEON" ]
else [ "NONE" ];
# CMake Build flags for the selected ISAs. For a list of flags, see
# https://github.com/ARM-software/astc-encoder/blob/main/Docs/Building.md
isaFlags = map ( isa: "-DASTCENC_ISA_${isa}=ON" ) isas;
# The suffix of the binary to link as 'astcenc'
mainBinary = builtins.replaceStrings
[ "AVX2" "SSE41" "SSE2" "NEON" "NONE" "NATIVE" ]
[ "avx2" "sse4.1" "sse2" "neon" "none" "native" ]
( builtins.head isas );
};
stdenv.mkDerivation rec {
pname = "astc-encoder";
version = "4.5.0";
src = fetchFromGitHub {
owner = "ARM-software";
repo = "astc-encoder";
rev = version;
sha256 = "sha256-pNoBOp//xa5F6/T1cwtdHsAWLZeIHgxZ7UKaB60fg4M=";
};
nativeBuildInputs = [ cmake ];
cmakeFlags = isaFlags ++ [
"-DCMAKE_BUILD_TYPE=RelWithDebInfo"
"-DASTCENC_UNIVERSAL_BUILD=OFF"
];
# Set a fixed build year to display within help output (otherwise, it would be 1980)
postPatch = ''
substituteInPlace Source/cmake_core.cmake \
--replace 'string(TIMESTAMP astcencoder_YEAR "%Y")' 'set(astcencoder_YEAR "2023")'
'';
# Provide 'astcenc' link to main executable
postInstall = ''
ln -s $out/bin/astcenc-${mainBinary} $out/bin/astcenc
'';
meta = with lib; {
homepage = "https://github.com/ARM-software/astc-encoder";
description = "An encoder for the ASTC texture compression format";
longDescription = ''
The Adaptive Scalable Texture Compression (ASTC) format is
widely supported by mobile and desktop graphics hardware and
provides better quality at a given bitrate compared to ETC2.
This program supports both compression and decompression in LDR
and HDR mode and can read various image formats. Run `astcenc
-help` to see all the options.
'';
platforms = platforms.unix;
license = licenses.asl20;
maintainers = with maintainers; [ dasisdormax ];
broken = !stdenv.is64bit;
};
}
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