#!/bin/bash ../install.sh

NAME='mesa'
VERSION='25.0.7'
DOWNLOAD_URL="https://archive.mesa3d.org/mesa-$VERSION.tar.xz#592272df3cf01e85e7db300c449df5061092574d099da275d19e97ef0510f8a6"
DEPENDENCIES=('zlib' 'zstd' 'expat')
CONFIGURE_OPTIONS=(
	'-Dprefix=/usr'
	'-Dosmesa=true'
	'-Dvulkan-drivers=[]'
	'-Dplatforms=[]'
	'-Dglx=disabled'
	'-Dbuildtype=release'
)

configure() {
	llvm_version='20.1.8'
	llvm_root="../../llvm/llvm-$llvm_version-$BANAN_ARCH"

	gallium_driver=softpipe

	if [ -d "$llvm_root" ]; then
		llvm_lib=$(realpath "$llvm_root/build/lib")

		mkdir -p subprojects/llvm

		wrap_file='subprojects/llvm/meson.build'
		echo "project('llvm', ['cpp'])"                         >$wrap_file
		echo ""                                                >>$wrap_file
		echo "cpp = meson.get_compiler('cpp')"                 >>$wrap_file
		echo ""                                                >>$wrap_file
		echo "_deps = []"                                      >>$wrap_file
		echo "_search = '$llvm_lib'"                           >>$wrap_file
		echo "foreach d : ["                                   >>$wrap_file
		for path in $llvm_lib/libLLVM*.a; do
			name=$(basename $path)
			echo "    '${name:3:-2}',"                         >>$wrap_file
		done
		echo "  ]"                                             >>$wrap_file
		echo "  _deps += cpp.find_library(d, dirs : _search)"  >>$wrap_file
		echo "endforeach"                                      >>$wrap_file
		echo ""                                                >>$wrap_file
		echo "dep_llvm = declare_dependency("                  >>$wrap_file
		echo "  include_directories : include_directories("    >>$wrap_file
		echo "      '$(realpath $llvm_root/llvm/include)',"    >>$wrap_file
		echo "      '$(realpath $llvm_root/build/include)',"   >>$wrap_file
		echo "    )," >>$wrap_file
		echo "  dependencies : _deps,"                         >>$wrap_file
		echo "  version : '$llvm_version',"                    >>$wrap_file
		echo ")"                                               >>$wrap_file

		gallium_driver=llvmpipe
	fi

	meson setup \
		--reconfigure \
		--cross-file "$MESON_CROSS_FILE" \
		"${CONFIGURE_OPTIONS[@]}" \
		"-Dgallium-drivers=$gallium_driver" \
		build || exit 1
}

build() {
	meson compile -C build || exit 1
}

install() {
	meson install --destdir="$BANAN_SYSROOT" -C build || exit 1

	ln -sf osmesa.pc $BANAN_SYSROOT/usr/lib/pkgconfig/opengl.pc
	ln -sf libOSMesa.so $BANAN_SYSROOT/usr/lib/libGL.so
}