Refactor the wasm graphic layer (wgl) and the gui sample (#231)

core/deps/download.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+DEPS_ROOT=$(cd "$(dirname "$0")/" && pwd)
+cd ${DEPS_ROOT}
+
+
+if [ ! -d "lvgl" ]; then
+        echo "git pull lvgl..."
+        git clone https://github.com/littlevgl/lvgl.git --branch v6.0.1
+        [ $? -eq 0 ] || exit $?
+
+        ../app-framework/wgl/app/prepare_headers.sh
+fi
+if [ ! -d "lv_drivers" ]; then
+        echo "git pull lv_drivers..."
+        git clone https://github.com/littlevgl/lv_drivers.git
+        [ $? -eq 0 ] || exit $?
+fi
+
+if [ ! -d "tlsf" ]; then
+    echo "git pull tlsf..."
+    git clone https://github.com/mattconte/tlsf
+    [ $? -eq 0 ] || exit $?
+    #cd ${WAMR_DIR}/core/shared/mem-alloc
+fi
+
+
+exit 0