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

samples/gui/wasm-apps/increase/CMakeLists.txt

@@ -0,0 +1,20 @@
+cmake_minimum_required(VERSION 2.8)
+
+project(wgl)
+
+set (WAMR_ROOT_DIR ${CMAKE_CURRENT_LIST_DIR}/../../../../)
+
+include_directories(
+    ${WAMR_ROOT_DIR}/wamr-sdk/out/gui/app-sdk/wamr-app-framework/include
+    ${WAMR_ROOT_DIR}/core/deps
+)
+
+set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS},-L${WAMR_ROOT_DIR}/wamr-sdk/out/gui/app-sdk/wamr-app-framework/lib")
+set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS},--export=on_init,--export=on_timer_callback,--export=on_widget_event,--export=__heap_base,--export=__data_end")
+set (CMAKE_C_FLAGS          "${CMAKE_C_FLAGS} -O3 -Wno-unused-command-line-argument")
+
+add_executable(ui_increase.wasm
+    ${CMAKE_CURRENT_LIST_DIR}/src/main.c
+)
+
+target_link_libraries(ui_increase.wasm  app_framework)

samples/gui/wasm-apps/increase/Makefile

@@ -0,0 +1,34 @@
+# 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 = ${shell pwd}
+IWASM_DIR = ../../../../core/iwasm
+APP_FRAMEWORK_DIR = ../../../../core/app-framework
+DEPS_DIR = ../../../../core/deps
+
+CFLAGS += -O3 \
+	  -Wno-int-conversion \
+	  -I$(APP_DIR)/src \
+	  -I$(APP_FRAMEWORK_DIR)/base/app \
+	  -I$(APP_FRAMEWORK_DIR)/app-native-shared \
+	  -I$(APP_FRAMEWORK_DIR)/sensor/app \
+	  -I$(APP_FRAMEWORK_DIR)/wgl/app \
+	  -I$(APP_FRAMEWORK_DIR)/connection/app \
+	  -I${DEPS_DIR}
+
+SRCS += $(APP_DIR)/src/main.c
+
+# For app size consideration, not all but necessary app libs are included
+SRCS += $(APP_FRAMEWORK_DIR)/base/app/timer.c
+SRCS += $(APP_FRAMEWORK_DIR)/wgl/app/src/*.c
+
+all:
+	@$(CC) $(CFLAGS) $(SRCS) \
+    --target=wasm32 -O3 -z stack-size=2048 -Wl,--initial-memory=65536 \
+    -Wl,--allow-undefined \
+    -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_app.wasm

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

@@ -0,0 +1,78 @@
+/*
+ * 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 = 1;
+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, "1");
+    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 == 100)
+            label_count1_value = 0;
+    }
+
+}