add missing wasm app

samples/gui/wasm-apps/decrease/Makefile

@@ -0,0 +1,29 @@
+# Copyright (C) 2019 Intel Corporation.  All rights reserved.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+CC = /opt/wasi-sdk/bin/clang
+APP_DIR = ${shell pwd}
+IWASM_DIR = $(APP_DIR)/../../../../core/iwasm
+SDK_DIR = $(APP_DIR)/../../../../wamr-sdk/out/gui/app-sdk
+APP_FRAMEWORK_DIR = $(APP_DIR)/../../../../wamr-sdk/out/gui/app-sdk/wamr-app-framework
+DEPS_DIR = $(APP_DIR)/../../../../core/deps
+
+CFLAGS += -O3 \
+    -Wno-int-conversion \
+    -I$(APP_DIR)/src \
+    -I$(APP_FRAMEWORK_DIR)/include \
+    -I${DEPS_DIR}
+
+SRCS += $(APP_DIR)/src/main.c
+
+all:
+	@$(CC) $(CFLAGS) $(SRCS) \
+    --target=wasm32 -O3 -z stack-size=2048 -Wl,--initial-memory=65536 \
+    --sysroot=$(SDK_DIR)/libc-builtin-sysroot       \
+    -L$(APP_FRAMEWORK_DIR)/lib -lapp_framework      \
+    -Wl,--allow-undefined-file=$(SDK_DIR)/libc-builtin-sysroot/share/defined-symbols.txt	\
+    -Wl,--no-threads,--strip-all,--no-entry -nostdlib \
+    -Wl,--export=on_init -Wl,--export=on_timer_callback \
+    -Wl,--export=on_widget_event \
+    -Wl,--export=__heap_base,--export=__data_end \
+    -o ui_decrease.wasm

samples/gui/wasm-apps/decrease/src/main.c

@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2019 Intel Corporation.  All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+ */
+
+#include <stdlib.h>
+#include "wasm_app.h"
+#include "wa-inc/lvgl/lvgl.h"
+#include "wa-inc/timer_wasm_app.h"
+
+extern char g_widget_text[];
+
+static void btn_event_cb(lv_obj_t *btn, lv_event_t event);
+
+uint32_t count = 0;
+char count_str[11] = { 0 };
+lv_obj_t *hello_world_label;
+lv_obj_t *count_label;
+lv_obj_t *btn1;
+lv_obj_t *label_count1;
+int label_count1_value = 100;
+char label_count1_str[11] = { 0 };
+
+void timer1_update(user_timer_t timer1)
+{
+    if ((count % 100) == 0) {
+        snprintf(count_str, sizeof(count_str), "%d", count / 100);
+        lv_label_set_text(count_label, count_str);
+    }
+    ++count;
+}
+
+void on_init()
+{
+    char *text;
+
+    hello_world_label = lv_label_create(NULL, NULL);
+    lv_label_set_text(hello_world_label, "Hello world!");
+    text = lv_label_get_text(hello_world_label);
+    printf("Label text %lu %s \n", strlen(text), text);
+    lv_obj_align(hello_world_label, NULL, LV_ALIGN_IN_TOP_LEFT, 0, 0);
+
+    count_label = lv_label_create(NULL, NULL);
+    lv_obj_align(count_label, NULL, LV_ALIGN_IN_TOP_MID, 0, 0);
+
+    btn1 = lv_btn_create(NULL, NULL); /*Create a button on the currently loaded screen*/
+    lv_obj_set_event_cb(btn1, btn_event_cb); /*Set function to be called when the button is released*/
+    lv_obj_align(btn1, NULL, LV_ALIGN_CENTER, 0, 0); /*Align below the label*/
+
+    /*Create a label on the button*/
+    lv_obj_t *btn_label = lv_label_create(btn1, NULL);
+    lv_label_set_text(btn_label, "Click --");
+
+    label_count1 = lv_label_create(NULL, NULL);
+    lv_label_set_text(label_count1, "100");
+    lv_obj_align(label_count1, NULL, LV_ALIGN_IN_BOTTOM_MID, 0, 0);
+
+    /* set up a timer */
+    user_timer_t timer;
+    timer = api_timer_create(10, true, false, timer1_update);
+    if (timer)
+        api_timer_restart(timer, 10);
+    else
+        printf("Fail to create timer.\n");
+}
+
+static void btn_event_cb(lv_obj_t *btn, lv_event_t event)
+{
+    if(event == LV_EVENT_RELEASED) {
+        label_count1_value--;
+        snprintf(label_count1_str, sizeof(label_count1_str),
+                 "%d", label_count1_value);
+        lv_label_set_text(label_count1, label_count1_str);
+        if (label_count1_value == 0)
+            label_count1_value = 100;
+    }
+}