[Mac] Moved compiling Metal shaders from BuildMacOS.command script in…

…to scripts/ folder.

BuildMacOS.command

@@ -118,28 +118,6 @@ OPTIONS=(
     -B "$OUTPUT_DIR"
 )
 
-# Compiles the Metal shaders for all examples into the default.metallib file
-compile_example_metal_shaders()
-{
-    EXAMPLE_BASE_DIR=$OUTPUT_DIR/build
-    EXAMPLE_PROJECTS=($EXAMPLE_BASE_DIR/Example_*.app)
-
-    for PROJECT in ${EXAMPLE_PROJECTS[@]}; do
-        SHADER_FILES=()
-        for FILE in $PROJECT/Contents/Resources/*.metal; do
-            if [ -f $FILE ]; then
-                SHADER_FILES+=($FILE)
-            fi
-        done
-        if [ ! -z "$SHADER_FILES" ]; then
-            if [ $VERBOSE -ne 0 ]; then
-                echo "Compile Metal shaders: ${SHADER_FILES[@]}"
-            fi
-            xcrun -sdk macosx metal ${SHADER_FILES[@]} -o "$PROJECT/Contents/Resources/default.metallib"
-        fi
-    done
-}
-
 if [ $PROJECT_ONLY -eq 0 ]; then
     if [ "$GENERATOR" = "" ]; then
         cmake -DCMAKE_BUILD_TYPE=$BUILD_TYPE ${OPTIONS[@]} # CMake default generator
@@ -151,7 +129,12 @@ if [ $PROJECT_ONLY -eq 0 ]; then
     # Compile Metal shaders for all examples into the default.metallib.
     # This is done by Xcode automatically when built from within the IDE,
     # so we only do this when no project files are generated.
-    compile_example_metal_shaders
+    COMPILE_METAL_SCRIPT=$SOURCE_DIR/scripts/CompileMetalToMetallib.sh
+    if [ $VERBOSE -ne 0 ]; then
+        $COMPILE_METAL_SCRIPT macosx "$OUTPUT_DIR/build" -v
+    else
+        $COMPILE_METAL_SCRIPT macosx "$OUTPUT_DIR/build"
+    fi
 else
     if [ "$GENERATOR" = "" ]; then
         GENERATOR="Xcode" # Default to Xcode for project solution

scripts/CompileMetalToMetallib.sh

@@ -0,0 +1,68 @@
+#!/bin/sh
+
+# Part of the LLGL project
+# Written by L. Hermanns 9/9/2024
+# -------------------------------
+# Compiles Metal shaders to a single default.metallib file for app bundles.
+# The input can either be a single Metal shader file, an app folder to compile all of its *.metal files,
+# or a directory with multiple *.app/ subfolders for which a separate default.metallib is generated each.
+
+# Parse input parameters
+METAL_SDK=$1
+INPUT_PATH=$2
+VERBOSE=0
+
+if [ "$#" -eq 0 ]; then
+    echo "Usage: CompileMetalToMetallib.sh SDK INPUT [-v|--verbose]"
+    exit 1
+fi
+
+if [ "$#" -eq 3 ]; then
+    if [ "$3" = "-v" ] || [ "$3" = "--verbose" ]; then
+        VERBOSE=1
+    fi
+fi
+
+# Compiles input Metal shaders to a single default.metallib output.
+# Example: compile_metal_shaders OUTPUT INPUT1 INPUT2 ...
+compile_metal_shaders()
+{
+    OUTPUT_DIR=$1
+    shift # get remaining arguments (compatible with sh)
+    INPUT_FILES=$@
+    if [ ! -z "$INPUT_FILES" ]; then
+        if [ $VERBOSE -ne 0 ]; then
+            echo "Compile Metal shaders: ${INPUT_FILES[@]}"
+        fi
+        xcrun -sdk $METAL_SDK metal ${INPUT_FILES[@]} -o "$OUTPUT_DIR/default.metallib"
+    fi
+}
+
+# Compiles all Metal shaders for the specified app folder.
+# Example: compile_all_app_metal_shaders Example_HelloTriangle.app
+compile_all_app_metal_shaders()
+{
+    APP_DIR=$1
+    APP_RESOURCES_DIR="$APP_DIR/Contents/Resources"
+    SHADER_FILES=()
+    for FILE in $APP_RESOURCES_DIR/*.metal; do
+        if [ -f $FILE ]; then
+            SHADER_FILES+=($FILE)
+        fi
+    done
+    compile_metal_shaders "$APP_RESOURCES_DIR" ${SHADER_FILES[@]}
+}
+
+if [ -f "$INPUT_PATH" ]; then
+    # Compile the specified input Metal shader
+    compile_metal_shaders $(dirname "$INPUT_PATH") "$INPUT_PATH"
+elif [ -d "$INPUT_PATH/Contents/Resources" ]; then
+    # Compile all *.metal shaders for the specified app
+    compile_all_app_metal_shaders "$INPUT_PATH"
+else
+    # Compile all *.metal shaders for all subdirectory apps
+    TARGET_APPS=($INPUT_PATH/*.app)
+    for APP_DIR in ${TARGET_APPS[@]}; do
+        compile_all_app_metal_shaders "$APP_DIR"
+    done
+fi