Add vulkan variant

scripts.d/45-vulkan.sh

@@ -0,0 +1,56 @@
+#!/bin/bash
+
+LUNARG_VERSION="1.2.148.1"
+LUNARG_SRC="https://sdk.lunarg.com/sdk/download/${LUNARG_VERSION}/windows/VulkanSDK-${LUNARG_VERSION}-Installer.exe"
+
+ffbuild_enabled() {
+    [[ $VARIANT != *vulkan* ]] && return -1
+    return 0
+}
+
+ffbuild_dockerstage() {
+    to_df "ADD $SELF /stage.sh"
+    to_df "RUN run_stage"
+}
+
+ffbuild_dockerbuild() {
+    mkdir vulkan && cd vulkan
+
+    if [[ $TARGET == win64 ]]; then
+        wget --no-cookies -O vulkan.exe "$LUNARG_SRC"
+        7z x vulkan.exe Include/vulkan Lib/vulkan-1.lib
+
+        find . -type f -exec chmod 644 {} \;
+        find . -type d -exec chmod 755 {} \;
+
+        mv Include/* "$FFBUILD_PREFIX"/include/.
+        mv Lib/* "$FFBUILD_PREFIX"/lib/.
+        
+        mkdir -p "$FFBUILD_PREFIX"/lib/pkgconfig
+        cat > "$FFBUILD_PREFIX"/lib/pkgconfig/vulkan.pc <<EOF
+prefix=$FFBUILD_PREFIX
+libdir=\${prefix}/lib
+includedir=\${prefix}/include
+
+Name: Vulkan-Loader
+Description: Vulkan Loader
+Version: $LUNARG_VERSION
+Libs: -L\${libdir} -lvulkan-1 -ladvapi32
+Cflags: -I\${includedir}
+EOF
+    else
+        echo "Target not supported"
+        return -1
+    fi
+
+    cd ..
+    rm -rf vulkan
+}
+
+ffbuild_configure() {
+    echo --enable-vulkan
+}
+
+ffbuild_unconfigure() {
+    echo --disable-vulkan
+}