ci: build with subrandr on mingw64 and msys2

ci/build-common.sh

@@ -4,3 +4,10 @@ common_args="--werror \
 "
 
 export CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=3"
+
+build_subrandr() {
+    git clone --depth=1 https://github.com/afishhh/subrandr.git
+    pushd subrandr
+    cargo xtask install --prefix "$@"
+    popd
+}

ci/build-mingw64.sh

@@ -286,6 +286,11 @@ _luajit () {
 }
 _luajit_mark=lib/libluajit-5.1.a
 
+_subrandr () {
+    build_subrandr "$prefix_dir" --target "$RUST_TARGET" -- -- -L"$prefix_dir"/lib
+}
+_subrandr_mark=lib/libsubrandr.dll.a
+
 for x in iconv zlib shaderc spirv-cross nv-headers dav1d lcms2; do
     build_if_missing $x
 done
@@ -296,6 +301,9 @@ fi
 for x in ffmpeg libplacebo freetype fribidi harfbuzz libass luajit; do
     build_if_missing $x
 done
+if [[ "$TARGET" != "i686-"* ]]; then
+    build_if_missing subrandr
+fi
 
 ## mpv
 
@@ -330,7 +338,7 @@ if [ "$2" = pack ]; then
     pushd artifact/tmp
     dlls=(
         libgcc_*.dll lib{ssp,stdc++,winpthread}-[0-9]*.dll # compiler runtime
-        av*.dll sw*.dll postproc-[0-9]*.dll lib{ass,freetype,fribidi,harfbuzz,iconv,placebo}-[0-9]*.dll
+        av*.dll sw*.dll {postproc,subrandr}-[0-9]*.dll lib{ass,freetype,fribidi,harfbuzz,iconv,placebo}-[0-9]*.dll
         lib{shaderc_shared,spirv-cross-c-shared,dav1d,lcms2}.dll zlib1.dll
     )
     if [[ -f vulkan-1.dll ]]; then

ci/build-msys2.sh

@@ -8,9 +8,18 @@ args=(
   -D{egl-angle-lib,egl-angle-win32,pdf-build,rubberband,win32-smtc}=enabled
 )
 
-[[ "$SYS" == "clang64" ]] && args+=(
-  -Db_sanitize=address,undefined
-)
+if [[ "$SYS" == "clang64" ]]; then
+    args+=(
+      -Db_sanitize=address,undefined
+    )
+else
+    # currently building with subrandr on clang64+asan
+    # causes a weird crash (https://github.com/msys2/MINGW-packages/issues/25267)
+    echo "::group::Building subrandr"
+    build_subrandr "/$SYS"
+    echo "::endgroup::"
+    args+=(-Dsubrandr=enabled)
+fi
 
 [[ "$SYS" == "clangarm64" ]] && args+=(
   -Dpdf-build=disabled