Initial version

.gitignore

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

README.md

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-# template-native-extension
+# Native extension template
+This template contains the basic setup for creation of a Defold native extension.
+
+You can learn more about native extensions in the [official manual](https://www.defold.com/manuals/extensions/).

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 rot_s = myextension.rot13(s)
+	print(rot_s) --> nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM
+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 = myextension
+
+[library]
+include_dirs = myextension
+

input/game.input_binding

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

myextension/ext.manifest

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

myextension/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>
+#include <stdlib.h>
+
+static int Rot13(lua_State* L)
+{
+    int top = lua_gettop(L);
+
+    // Check and get parameter string from stack
+    const char* str = luaL_checkstring(L, 1);
+
+    // Allocate new string
+    int len = strlen(str);
+    char *rot = (char *) malloc(len + 1);
+
+    // Iterate over the parameter string and create rot13 string
+    for(int i = 0; i <= len; i++) {
+        const char c = str[i];
+        if((c >= 'A' && c <= 'M') || (c >= 'a' && c <= 'm')) {
+            // Between A-M just add 13 to the char.
+            rot[i] = c + 13;
+        } else if((c >= 'N' && c <= 'Z') || (c >= 'n' && c <= 'z')) {
+            // If rolling past 'Z' which happens below 'M', wrap back (subtract 13)
+            rot[i] = c - 13;
+        } else {
+            // Leave character intact
+            rot[i] = c;
+        }
+    }
+
+    // Put the rotated string on the stack
+    lua_pushstring(L, rot);
+
+    // Free string memory. Lua has a copy by now.
+    free(rot);
+
+    // Assert that there is one item on the stack.
+    assert(top + 1 == lua_gettop(L));
+
+    // Return 1 item
+    return 1;
+}
+
+// Functions exposed to Lua
+static const luaL_reg Module_methods[] =
+{
+    {"rot13", Rot13},
+    {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)
+{
+    return dmExtension::RESULT_OK;
+}
+
+dmExtension::Result InitializeMyExtension(dmExtension::Params* params)
+{
+    // Init Lua
+    LuaInit(params->m_L);
+    printf("Registered %s Extension\n", MODULE_NAME);
+    return dmExtension::RESULT_OK;
+}
+
+dmExtension::Result AppFinalizeMyExtension(dmExtension::AppParams* params)
+{
+    return dmExtension::RESULT_OK;
+}
+
+dmExtension::Result FinalizeMyExtension(dmExtension::Params* params)
+{
+    return dmExtension::RESULT_OK;
+}
+
+
+// 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, 0, 0, FinalizeMyExtension)