Initialized Extension

.gitignore

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+/.internal
+/build
+.externalToolBuilders
+.DS_Store
+Thumbs.db
+.lock-wscript
+*.pyc
+.project
+.cproject
+builtins

LICENSE.md

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+MIT License
+
+Copyright (c) 2019 Defold
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

SIGW/ext.manifest

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+# C++ symbol in your extension
+name: "MyExtension"

SIGW/src/myextension.cpp

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+// myextension.cpp
+// Extension lib defines
+#define LIB_NAME "MyExtension"
+#define MODULE_NAME "myextension"
+
+// include the Defold SDK
+#include <dmsdk/sdk.h>
+
+static int Reverse(lua_State* L)
+{
+    // The number of expected items to be on the Lua stack
+    // once this struct goes out of scope
+    DM_LUA_STACK_CHECK(L, 1);
+
+    // Check and get parameter string from stack
+    char* str = (char*)luaL_checkstring(L, 1);
+
+    // Reverse the string
+    int len = strlen(str);
+    for(int i = 0; i < len / 2; i++) {
+        const char a = str[i];
+        const char b = str[len - i - 1];
+        str[i] = b;
+        str[len - i - 1] = a;
+    }
+
+    // Put the reverse string on the stack
+    lua_pushstring(L, str);
+
+    // Return 1 item
+    return 1;
+}
+
+// Functions exposed to Lua
+static const luaL_reg Module_methods[] =
+{
+    {"reverse", Reverse},
+    {0, 0}
+};
+
+static void LuaInit(lua_State* L)
+{
+    int top = lua_gettop(L);
+
+    // Register lua names
+    luaL_register(L, MODULE_NAME, Module_methods);
+
+    lua_pop(L, 1);
+    assert(top == lua_gettop(L));
+}
+
+dmExtension::Result AppInitializeMyExtension(dmExtension::AppParams* params)
+{
+    dmLogInfo("AppInitializeMyExtension\n");
+    return dmExtension::RESULT_OK;
+}
+
+dmExtension::Result InitializeMyExtension(dmExtension::Params* params)
+{
+    // Init Lua
+    LuaInit(params->m_L);
+    dmLogInfo("Registered %s Extension\n", MODULE_NAME);
+    return dmExtension::RESULT_OK;
+}
+
+dmExtension::Result AppFinalizeMyExtension(dmExtension::AppParams* params)
+{
+    dmLogInfo("AppFinalizeMyExtension\n");
+    return dmExtension::RESULT_OK;
+}
+
+dmExtension::Result FinalizeMyExtension(dmExtension::Params* params)
+{
+    dmLogInfo("FinalizeMyExtension\n");
+    return dmExtension::RESULT_OK;
+}
+
+dmExtension::Result OnUpdateMyExtension(dmExtension::Params* params)
+{
+    dmLogInfo("OnUpdateMyExtension\n");
+    return dmExtension::RESULT_OK;
+}
+
+void OnEventMyExtension(dmExtension::Params* params, const dmExtension::Event* event)
+{
+    switch(event->m_Event)
+    {
+        case dmExtension::EVENT_ID_ACTIVATEAPP:
+            dmLogInfo("OnEventMyExtension - EVENT_ID_ACTIVATEAPP\n");
+            break;
+        case dmExtension::EVENT_ID_DEACTIVATEAPP:
+            dmLogInfo("OnEventMyExtension - EVENT_ID_DEACTIVATEAPP\n");
+            break;
+        case dmExtension::EVENT_ID_ICONIFYAPP:
+            dmLogInfo("OnEventMyExtension - EVENT_ID_ICONIFYAPP\n");
+            break;
+        case dmExtension::EVENT_ID_DEICONIFYAPP:
+            dmLogInfo("OnEventMyExtension - EVENT_ID_DEICONIFYAPP\n");
+            break;
+        default:
+            dmLogWarning("OnEventMyExtension - Unknown event id\n");
+            break;
+    }
+}
+
+// Defold SDK uses a macro for setting up extension entry points:
+//
+// DM_DECLARE_EXTENSION(symbol, name, app_init, app_final, init, update, on_event, final)
+
+// MyExtension is the C++ symbol that holds all relevant extension data.
+// It must match the name field in the `ext.manifest`
+DM_DECLARE_EXTENSION(MyExtension, LIB_NAME, AppInitializeMyExtension, AppFinalizeMyExtension, InitializeMyExtension, OnUpdateMyExtension, OnEventMyExtension, FinalizeMyExtension)

example/example.collection

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+name: "main"
+scale_along_z: 0
+embedded_instances {
+  id: "go"
+  data: "components {\n"
+  "  id: \"example\"\n"
+  "  component: \"/example/example.script\"\n"
+  "  position {\n"
+  "    x: 0.0\n"
+  "    y: 0.0\n"
+  "    z: 0.0\n"
+  "  }\n"
+  "  rotation {\n"
+  "    x: 0.0\n"
+  "    y: 0.0\n"
+  "    z: 0.0\n"
+  "    w: 1.0\n"
+  "  }\n"
+  "}\n"
+  ""
+  position {
+    x: 0.0
+    y: 0.0
+    z: 0.0
+  }
+  rotation {
+    x: 0.0
+    y: 0.0
+    z: 0.0
+    w: 1.0
+  }
+  scale3 {
+    x: 1.0
+    y: 1.0
+    z: 1.0
+  }
+}

example/example.script

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+function init(self)
+	local s = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+	local reverse_s = myextension.reverse(s)
+	print(reverse_s) --> ZYXWVUTSRQPONMLKJIHGFEDCBAzyxwvutsrqponmlkjihgfedcba
+end
+
+function final(self)
+	-- Add finalization code here
+	-- Remove this function if not needed
+end
+
+function update(self, dt)
+	-- Add update code here
+	-- Remove this function if not needed
+end
+
+function on_message(self, message_id, message, sender)
+	-- Add message-handling code here
+	-- Remove this function if not needed
+end
+
+function on_input(self, action_id, action)
+	-- Add input-handling code here
+	-- Remove this function if not needed
+end
+
+function on_reload(self)
+	-- Add reload-handling code here
+	-- Remove this function if not needed
+end

game.project

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+[bootstrap]
+main_collection = /example/example.collectionc
+
+[script]
+shared_state = 1
+
+[display]
+width = 960
+height = 640
+
+[project]
+title = SIGW-Extension
+
+[library]
+include_dirs = SIGW
+

input/game.input_binding

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+mouse_trigger {
+  input: MOUSE_BUTTON_1
+  action: "touch"
+}