diff --git a/.gitignore b/.gitignore
index 347bb45..2a7d08a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,4 @@ android/build/
 android/.gradle/
 android/.externalNativeBuild/
 
+android/src/main/assets/
diff --git a/android/CMakeLists.txt b/android/CMakeLists.txt
index 4d9dce4..615a87f 100644
--- a/android/CMakeLists.txt
+++ b/android/CMakeLists.txt
@@ -27,6 +27,7 @@ add_library(
 	src/main/cpp/main.cpp 
 	../engine/pch.cpp
 	../engine/util.cpp
+	../engine/asset.cpp
 	../engine/image.cpp
 	../engine/texture.cpp
 	../engine/font.cpp
diff --git a/android/build-run.bat b/android/build-run.bat
new file mode 100644
index 0000000..87c7a75
--- /dev/null
+++ b/android/build-run.bat
@@ -0,0 +1,3 @@
+call gradlew installDebug
+call adb shell am start -n com.omigamedev/android.app.NativeActivity
+pause
\ No newline at end of file
diff --git a/android/build.gradle b/android/build.gradle
index 3118270..f7915f8 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -9,10 +9,13 @@ buildscript {
 apply plugin: 'android'
 
 android {
-    compileSdkVersion 'android-19'
-    buildToolsVersion '24.0.3'
+    compileSdkVersion 23
+    buildToolsVersion '23.0.2'
 
     defaultConfig {
+        applicationId = 'com.omigamedev'
+        minSdkVersion   9
+        targetSdkVersion  23
         // This block is different from the one you use to link Gradle
         // to your CMake or ndk-build script.
         externalNativeBuild {
diff --git a/android/local.properties b/android/local.properties
deleted file mode 100644
index 04083c5..0000000
--- a/android/local.properties
+++ /dev/null
@@ -1,11 +0,0 @@
-# This file is automatically generated by Android Tools.
-# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
-#
-# This file must *NOT* be checked into Version Control Systems,
-# as it contains information specific to your local configuration.
-
-# location of the SDK. This is only used by Ant
-# For customization when using a Version Control System, please read the
-# header note.
-sdk.dir=/Users/omimac/android-sdk-macosx
-ndk.dir=/Users/omimac/android-ndk-r13
diff --git a/android/src/main/AndroidManifest.xml b/android/src/main/AndroidManifest.xml
index 117a040..413a44f 100644
--- a/android/src/main/AndroidManifest.xml
+++ b/android/src/main/AndroidManifest.xml
@@ -3,11 +3,17 @@
       package="com.omigamedev"
       android:versionCode="1"
       android:versionName="1.0">
-    <application android:label="@string/app_name" android:icon="@drawable/ic_launcher">
+    <application android:label="@string/app_name" 
+                 android:icon="@drawable/ic_launcher"
+                 android:allowBackup="false"
+                 android:hasCode="false"
+                 android:theme="@android:style/Theme.NoTitleBar.Fullscreen">
         <activity android:name="android.app.NativeActivity"
-                  android:label="@string/app_name">
+                  android:label="@string/app_name"
+                  android:configChanges="orientation|keyboardHidden"
+                  android:screenOrientation="sensorLandscape">
             <meta-data android:name="android.app.lib_name"
-              android:value="native-lib" />
+                       android:value="native-lib" />
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
diff --git a/android/src/main/cpp/main.cpp b/android/src/main/cpp/main.cpp
index cb915fc..8c869a1 100755
--- a/android/src/main/cpp/main.cpp
+++ b/android/src/main/cpp/main.cpp
@@ -24,6 +24,7 @@
 
 #include "pch.h"
 #include "app.h"
+#include "..\..\..\..\engine\asset.h"
 
 /**
  * Our saved state data.
@@ -150,15 +151,13 @@ static int engine_init_display(struct engine* engine) {
     //glShadeModel(GL_SMOOTH);
     glDisable(GL_DEPTH_TEST);
     //glEnableClientState(GL_VERTEX_ARRAY);
-
+    Asset::m_am = engine->app->activity->assetManager;
     App::I.width = w;
     App::I.height = h;
-    App::I.initShaders();
-
-    if (!plane.create<1>(1,1))
-        LOG("Failed to create the plane mesh");
+    App::I.init();
 
     LOG("All ready");
+    engine->animating = 1;
 
     return 0;
 }
@@ -167,22 +166,10 @@ static int engine_init_display(struct engine* engine) {
  * Just the current frame in the display.
  */
 static void engine_draw_frame(struct engine* engine) {
-    if (engine->display == NULL) {
-        // No display.
+    if (engine->display == NULL)
         return;
-    }
 
-    // Just fill the screen with a color.
-    glClearColor(((float)engine->state.x)/engine->width, engine->state.angle,
-                 ((float)engine->state.y)/engine->height, 1);
-    glClear(GL_COLOR_BUFFER_BIT);
-
-    glm::mat4 mvp = glm::ortho<float>(-1, 1, -1, 1, -1, 1);
-    //App::I.update(now - _prevTime);
-    ShaderManager::use(kShader::Color);
-    ShaderManager::u_mat4(kShaderUniform::MVP, mvp);
-    ShaderManager::u_vec4(kShaderUniform::Col, glm::vec4(1, 0, 0, 1));
-    plane.draw_fill();
+    App::I.update(0);
 
     eglSwapBuffers(engine->display, engine->surface);
 }
@@ -212,12 +199,33 @@ static void engine_term_display(struct engine* engine) {
  */
 static int32_t engine_handle_input(struct android_app* app, AInputEvent* event) {
     struct engine* engine = (struct engine*)app->userData;
-    if (AInputEvent_getType(event) == AINPUT_EVENT_TYPE_MOTION) {
-        engine->animating = 1;
-        engine->state.x = AMotionEvent_getX(event, 0);
-        engine->state.y = AMotionEvent_getY(event, 0);
-        return 1;
-    }
+    float x = AMotionEvent_getX(event, 0);
+    float y = AMotionEvent_getY(event, 0);
+    MouseEvent e;
+    int32_t eventType = AInputEvent_getType(event);
+    switch (eventType) {
+    case AINPUT_EVENT_TYPE_MOTION:
+        switch (AInputEvent_getSource(event)) {
+        case AINPUT_SOURCE_TOUCHSCREEN:
+            int action = AKeyEvent_getAction(event) & AMOTION_EVENT_ACTION_MASK;
+            switch (action) {
+            case AMOTION_EVENT_ACTION_DOWN:
+                App::I.mouse_down(0, x, y);
+                return 1;
+            case AMOTION_EVENT_ACTION_UP:
+                App::I.mouse_up(0, x, y);
+                return 1;
+            case AMOTION_EVENT_ACTION_MOVE:
+                App::I.mouse_move(x, y);
+                return 1;
+            }
+            break;
+        } // end switch
+        break;
+    case AINPUT_EVENT_TYPE_KEY:
+        // handle key input...
+        break;
+    } // end switch
     return 0;
 }
 
diff --git a/android/src/main/res/values/strings.xml b/android/src/main/res/values/strings.xml
index 47e960d..bafe393 100644
--- a/android/src/main/res/values/strings.xml
+++ b/android/src/main/res/values/strings.xml
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <string name="app_name">DummyActivity</string>
+    <string name="app_name">LayoutEngine</string>
 </resources>
diff --git a/data/arial.ttf b/data/arial.ttf
new file mode 100644
index 0000000..ad7d8ea
Binary files /dev/null and b/data/arial.ttf differ
diff --git a/data/layout.xml b/data/layout.xml
index 38c4048..96cfbaa 100644
--- a/data/layout.xml
+++ b/data/layout.xml
@@ -283,11 +283,8 @@
           </border>
         </node>
         <!-- content panel -->
-        <border margin="10 0 10 10" border-color=".8" color="1" width="1" grow="1" pad="10" wrap="1" dir="col" justify="center" align="center">
-          <text text="Viewport" font-face="arial" font-size="30" color="0 .1 .1 1"/>
-          <text text="Made in C++11 using OpenGL 3.1" font-face="arial" font-size="11" color="0 .1 .1 1"/>
-          <!--<text text="this is a small description of the useless big text above" font-face="arial" font-size="11" color="0 1 1 1"/>-->
-          <image id="check" margin="10 0 0 0" path="data/meme/nothing-to-do-here.jpg" width="300" height="200"/>
+        <border grow="1" color=".1" pad="10">
+          <viewport grow="1"></viewport>
         </border>
       </node>
       <!-- status bar -->
diff --git a/engine.vcxproj b/engine.vcxproj
index 9a1b73d..86a22f3 100644
--- a/engine.vcxproj
+++ b/engine.vcxproj
@@ -151,6 +151,7 @@
   </ItemDefinitionGroup>
   <ItemGroup>
     <ClCompile Include="engine\app.cpp" />
+    <ClCompile Include="engine\asset.cpp" />
     <ClCompile Include="engine\font.cpp" />
     <ClCompile Include="engine\image.cpp" />
     <ClCompile Include="engine\layout.cpp" />
@@ -186,6 +187,7 @@
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="engine\app.h" />
+    <ClInclude Include="engine\asset.h" />
     <ClInclude Include="engine\font.h" />
     <ClInclude Include="engine\image.h" />
     <ClInclude Include="engine\layout.h" />
diff --git a/engine.vcxproj.filters b/engine.vcxproj.filters
index 52fdc9e..7edc68e 100644
--- a/engine.vcxproj.filters
+++ b/engine.vcxproj.filters
@@ -54,6 +54,9 @@
     <ClCompile Include="engine\util.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="engine\asset.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="engine\app.h">
@@ -83,5 +86,8 @@
     <ClInclude Include="engine\util.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="engine\asset.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/engine/app.cpp b/engine/app.cpp
index f14c62e..faa966c 100644
--- a/engine/app.cpp
+++ b/engine/app.cpp
@@ -3,6 +3,15 @@
 
 App App::I; // singleton
 
+#ifdef __APPLE__
+#define SHADER_VERSION "#version 300 es\n"
+#elif __ANDROID__
+#define SHADER_VERSION "#version 300 es\n"
+#elif _WIN32
+#define SHADER_VERSION "#version 150\n"
+#endif
+
+
 void App::create()
 {
     width = 800;
@@ -12,7 +21,7 @@ void App::create()
 void App::initShaders()
 {
     static const char* shader_v =
-        "#version 300 es\n"
+        SHADER_VERSION
         "uniform mat4 mvp;"
         "in vec4 pos;"
         "in vec2 uvs;"
@@ -22,7 +31,7 @@ void App::initShaders()
         "   gl_Position = mvp * vec4(pos.xyz, 1.f);"
         "}";
     static const char* shader_f =
-        "#version 300 es\n"
+        SHADER_VERSION
         "uniform sampler2D tex;"
         "in vec3 uv;"
         "out vec4 frag;"
@@ -31,7 +40,7 @@ void App::initShaders()
         "   frag = texture(tex, uv.xy);"
         "}";
     static const char* shader_uv_f =
-        "#version 300 es\n"
+        SHADER_VERSION
         "uniform sampler2D tex;"
         "in vec3 uv;"
         "out vec4 frag;"
@@ -39,7 +48,7 @@ void App::initShaders()
         "   frag = vec4(uv.xy,0,1);"
         "}";
     static const char* shader_atlas_v =
-        "#version 300 es\n"
+        SHADER_VERSION
         "uniform mat4 mvp;"
         "uniform vec2 tof;"
         "uniform vec2 tsz;"
@@ -51,7 +60,7 @@ void App::initShaders()
         "   gl_Position = mvp * vec4(pos, 0, 1);"
         "}";
     static const char* shader_atlas_f =
-        "#version 300 es\n"
+        SHADER_VERSION
         "uniform sampler2D tex;"
         "in vec2 uv;"
         "out vec4 frag;"
@@ -59,21 +68,21 @@ void App::initShaders()
         "   frag = texture(tex, uv);"
         "}";
     static const char* shader_color_v =
-        "#version 300 es\n"
+        SHADER_VERSION
         "uniform mat4 mvp;"
         "in vec4 pos;"
         "void main(){"
         "   gl_Position = mvp * pos;"
         "}";
     static const char* shader_color_f =
-        "#version 300 es\n"
+        SHADER_VERSION
         "uniform vec4 col;"
         "out vec4 frag;"
         "void main(){"
         "   frag = col;"
         "}";
     static const char* shader_font_v =
-        "#version 300 es\n"
+        SHADER_VERSION
         "uniform mat4 mvp;"
         "in vec2 pos;"
         "in vec2 uvs;"
@@ -83,7 +92,7 @@ void App::initShaders()
         "   gl_Position = mvp * vec4(pos, 0, 1);"
         "}";
     static const char* shader_font_f =
-        "#version 300 es\n"
+        SHADER_VERSION
         "uniform sampler2D tex;"
         "uniform vec4 col;"
         "in vec2 uv;"
@@ -93,6 +102,7 @@ void App::initShaders()
         "   frag = vec4(col.rgb, a);"
         "}";
 
+    LOG("initializing shaders");
     if (!ShaderManager::create(kShader::Texture, shader_v, shader_f))
         LOG("Failed to create shader Texture");
     if (!ShaderManager::create(kShader::Color, shader_color_v, shader_color_f))
@@ -103,32 +113,36 @@ void App::initShaders()
         LOG("Failed to create shader Font");
     if (!ShaderManager::create(kShader::Atlas, shader_atlas_v, shader_atlas_f))
         LOG("Failed to create shader Atlas");
+    LOG("shaders initialized");
 }
 
 void App::initAssets()
 {
-    #if _WIN32
-    const char* ttf = "C:\\Windows\\Fonts\\arial.ttf";
-#else
-    const char* ttf = "/Library/Fonts/Arial.ttf";
-#endif
+    LOG("initializing assets");
     FontManager::init();
-    FontManager::load(kFont::Arial_11, ttf, 15);
-    FontManager::load(kFont::Arial_30, ttf, 30);
+    LOG("initializing assets loading fonts");
+    FontManager::load(kFont::Arial_11, "data/arial.ttf", 15);
+    FontManager::load(kFont::Arial_30, "data/arial.ttf", 30);
 
+    LOG("initializing assets create sampler");
     sampler.create(GL_NEAREST);
+    LOG("initializing assets load uvs texture");
     if (!tex.load("data/uvs.jpg"))
         LOG("error loading image\n");
+    LOG("initializing assets completed");
 }
 
 void App::initLayout()
 {
+    LOG("initializing layout statics");
     NodeBorder::static_init();
     NodeImage::static_init();
     NodeIcon::static_init();
 
     layout.on_loaded = [&] {
-        layout[main_id]->update(width, height);
+        LOG("initializing layout updating after load");
+        layout[main_id]->update(width, height, zoom);
+        LOG("initializing layout components");
         if (auto* button = layout[main_id]->find<NodeButton>("btn-close"))
         {
             button->on_click = [] { exit(0); };
@@ -191,7 +205,9 @@ void App::initLayout()
             toolbar->m_flood_events = true;
         }
     };
-    layout.load("data/layout2.xml");
+    LOG("initializing layout xml");
+    layout.load("data/layout.xml");
+    LOG("initializing layout completed");
 }
 
 void App::init()
@@ -219,7 +235,7 @@ void App::init()
 
     initShaders();
     initAssets();
-    initLayout();    
+    initLayout();
 
     glEnable(GL_TEXTURE_2D);
     glDisable(GL_DEPTH_TEST);
@@ -243,6 +259,7 @@ void App::init()
     GLfloat width_range[2];
     glGetFloatv(GL_ALIASED_LINE_WIDTH_RANGE, width_range);
     LOG("GL line range: %f - %f\n", width_range[0], width_range[1]);
+    LOG("Screen Size: %f %f", width, height);
 }
 
 void App::update(float dt)
@@ -251,14 +268,17 @@ void App::update(float dt)
     glViewport(0, 0, (GLsizei)width, (GLsizei)height);
     glClear(GL_COLOR_BUFFER_BIT);
 
-    layout.reload();
+    //layout.reload();
+    if (auto* main = layout[main_id])
+        main->update(width, height, zoom);
 
     auto observer = [this](Node* n)
     {
         if (n && n->m_display)
         {
             auto box = n->m_clip;
-            glScissor((int)box.x-1, (int)(height - box.y - box.w)-1, (int)box.z+2, (int)box.w+2);
+            glm::vec4 c = glm::vec4((int)box.x - 1, (int)(height / zoom - box.y - box.w) - 1, (int)box.z + 2, (int)box.w + 2) * zoom;
+            glScissor(c.x, c.y, c.z, c.w);
             n->draw();
         }
     };
@@ -275,16 +295,16 @@ void App::resize(float w, float h)
     width = w;
     height = h;
     if (auto* main = layout[main_id])
-        main->update(w, h);
+        main->update(w, h, zoom);
 }
 
 void App::mouse_down(int button, float x, float y)
 {
     MouseEvent e;
     e.m_type = button ? kEventType::MouseDownR : kEventType::MouseDownL;
-    e.m_pos = { x, y };
+    e.m_pos = { x / zoom, y / zoom };
     layout[main_id]->on_event(&e);
-    LOG("mouse click %f %f\n", x, y);
+    LOG("mouse click button%d pos %f %f\n", button, x, y);
 
     if (popup)
     {
@@ -295,7 +315,7 @@ void App::mouse_down(int button, float x, float y)
     {
         popup = (NodePopupMenu*)layout[const_hash("popup-menu")]->m_children[0]->clone();
         popup->SetPositioning(YGPositionTypeAbsolute);
-        popup->SetPosition(x, y);
+        popup->SetPosition(x / zoom, y / zoom);
         layout[main_id]->add_child(popup);
     }
     layout[main_id]->update();
@@ -304,7 +324,7 @@ void App::mouse_move(float x, float y)
 {
     MouseEvent e;
     e.m_type = kEventType::MouseMove;
-    e.m_pos = { x, y };
+    e.m_pos = { x / zoom, y / zoom };
     if (auto* main = layout[main_id])
         main->on_event(&e);
 }
@@ -312,7 +332,7 @@ void App::mouse_up(int button, float x, float y)
 {
     MouseEvent e;
     e.m_type = button ? kEventType::MouseUpR : kEventType::MouseUpL;
-    e.m_pos = { x, y };
+    e.m_pos = { x / zoom, y / zoom };
     layout[main_id]->on_event(&e);
     layout[main_id]->update();
 }
diff --git a/engine/app.h b/engine/app.h
index d935660..7a739dd 100644
--- a/engine/app.h
+++ b/engine/app.h
@@ -22,6 +22,11 @@ public:
     static App I;
     float width;
     float height;
+#ifdef __ANDROID__
+    float zoom = 4.0;
+#else
+    float zoom = 1.0;
+#endif // __ANDROID__
     void init();
     void initShaders();
     void initAssets();
diff --git a/engine/asset.cpp b/engine/asset.cpp
new file mode 100644
index 0000000..c1eead5
--- /dev/null
+++ b/engine/asset.cpp
@@ -0,0 +1,59 @@
+#include "pch.h"
+#include "asset.h"
+
+#ifdef __ANDROID__
+AAssetManager* Asset::m_am;
+#endif
+
+bool Asset::open(const char* path)
+{
+    LOG("Asset::open %s", path);
+    m_current_path = path;
+#ifdef __ANDROID__
+    if (!(m_asset = AAssetManager_open(m_am, path, AASSET_MODE_RANDOM)))
+    {
+        LOG("AAssetManager_open failed");
+        return false;
+    }
+    m_len = (int)AAsset_getLength(m_asset);
+    m_data = (uint8_t*)AAsset_getBuffer(m_asset);
+#else
+    if (!(m_fp = fopen(path, "rb")))
+        return false;
+    fseek(m_fp, 0, SEEK_END);
+    m_len = (int)ftell(m_fp);
+    fseek(m_fp, 0, SEEK_SET);
+#endif
+    return true;
+}
+
+glm::uint8_t* Asset::read_all()
+{
+#ifdef __ANDROID__
+    return m_data;
+#else
+    if (!m_data)
+    {
+        m_data = new uint8_t[m_len];
+        if (m_len != fread(m_data, 1, m_len, m_fp))
+        {
+            LOG("ASSET READ FAILED for %s", m_current_path.c_str());
+            delete m_data;
+            m_data = nullptr;
+        }
+    }
+    return m_data;
+#endif
+}
+
+void Asset::close()
+{
+#ifdef __ANDROID__
+    AAsset_close(m_asset);
+#else
+    fclose(m_fp);
+    if (m_data)
+        delete m_data;
+    m_data = nullptr;
+#endif
+}
diff --git a/engine/asset.h b/engine/asset.h
new file mode 100644
index 0000000..269707d
--- /dev/null
+++ b/engine/asset.h
@@ -0,0 +1,18 @@
+#pragma once
+
+class Asset
+{
+public:
+#ifdef __ANDROID__
+    static AAssetManager* m_am;
+    AAsset* m_asset = nullptr;
+#endif
+    std::string m_current_path;
+    FILE* m_fp = nullptr;
+    int m_len = 0;
+    uint8_t* m_data = nullptr;
+    bool open(const char* path);
+    uint8_t* read_all();
+    void close();
+};
+
diff --git a/engine/font.cpp b/engine/font.cpp
index 9fc2407..49b1664 100644
--- a/engine/font.cpp
+++ b/engine/font.cpp
@@ -1,26 +1,23 @@
 #include "pch.h"
 #include "font.h"
 #include "shader.h"
+#include "asset.h"
 
 std::map<kFont, Font> FontManager::m_fonts;
 Sampler FontManager::m_sampler;
 
 bool Font::load(const char* ttf, int font_size)
 {
-    FILE* font_file = fopen(ttf, "rb");
-    if (font_file)
+    Asset file;
+    LOG("Font::load %s", ttf);
+    if (file.open(ttf) && file.read_all())
     {
-        fseek(font_file, 0, SEEK_END);
-        long sz = ftell(font_file);
-        auto data = std::make_unique<uint8_t[]>(sz);
-        fseek(font_file, 0, SEEK_SET);
-        auto bytes = fread(data.get(), 1, sz, font_file);
-        assert(bytes==sz);
+        LOG("Font::load loaded");
         auto bitmap = std::make_unique<uint8_t[]>(w*h);
         chars.resize(num_chars);
-        int ret = stbtt_BakeFontBitmap(data.get(), 0, (float)font_size, bitmap.get(), w, h, start_char, num_chars, chars.data());
-        font_tex.create(w, h, GL_RED, bitmap.get());
-        fclose(font_file);
+        int ret = stbtt_BakeFontBitmap(file.m_data, 0, (float)font_size, bitmap.get(), w, h, start_char, num_chars, chars.data());
+        font_tex.create(w, h, GL_LUMINANCE, bitmap.get());
+        file.close();
         return true;
     }
     return false;
@@ -44,8 +41,8 @@ const Font& FontManager::get(kFont id)
 bool TextMesh::create()
 {
     glGenBuffers(2, font_buffers);
+#if USE_VBO
     glGenVertexArrays(1, &font_array);
-    
     glBindVertexArray(font_array);
     glEnableVertexAttribArray(0);
     glEnableVertexAttribArray(1);
@@ -54,6 +51,7 @@ bool TextMesh::create()
     glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, sizeof(glm::vec4), (GLvoid*)0);
     glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(glm::vec4), (GLvoid*)(sizeof(float)*2));
     glBindVertexArray(0);
+#endif // USE_VBO
     return true;
 }
 
@@ -113,9 +111,21 @@ void TextMesh::draw()
         f.font_tex.bind();
         FontManager::m_sampler.bind(0);
 
+#if USE_VBO
         glBindVertexArray(font_array);
         glDrawElements(GL_TRIANGLES, font_array_count, GL_UNSIGNED_SHORT, 0);
         glBindVertexArray(0);
+#else
+        glEnableVertexAttribArray(0);
+        glEnableVertexAttribArray(1);
+        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, font_buffers[1]);
+        glBindBuffer(GL_ARRAY_BUFFER, font_buffers[0]);
+        glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, sizeof(glm::vec4), (GLvoid*)0);
+        glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(glm::vec4), (GLvoid*)(sizeof(float) * 2));
+        glDrawElements(GL_TRIANGLES, font_array_count, GL_UNSIGNED_SHORT, 0);
+        glBindBuffer(GL_ARRAY_BUFFER, 0);
+        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+#endif // USE_VBO
 
         f.font_tex.unbind();
         FontManager::m_sampler.unbind();
diff --git a/engine/image.cpp b/engine/image.cpp
index 2a9f860..50355d4 100644
--- a/engine/image.cpp
+++ b/engine/image.cpp
@@ -1,12 +1,20 @@
 #include "pch.h"
 #include "image.h"
+#include "asset.h"
 
 #include <stb/stb_image.h>
 
 bool Image::load(std::string filename)
 {
     //stbi_set_flip_vertically_on_load(true);
-    uint8_t* buffer = stbi_load(filename.c_str(), &width, &height, nullptr, 4);
+    Asset file;
+    if (!(file.open(filename.c_str()) && file.read_all()))
+    {
+        file.close();
+        return false;
+    }
+    uint8_t* buffer = stbi_load_from_memory(file.m_data, file.m_len, &width, &height, nullptr, 4);
+    file.close();
     comp = 4;
     m_data = std::unique_ptr<uint8_t[]>(buffer);
     return true;
diff --git a/engine/layout.cpp b/engine/layout.cpp
index 5d86f09..8939c90 100644
--- a/engine/layout.cpp
+++ b/engine/layout.cpp
@@ -1,6 +1,7 @@
 #include "pch.h"
 #include "layout.h"
 #include "util.h"
+#include "asset.h"
 
 Plane NodeBorder::m_plane;
 Plane NodeImage::m_plane;
@@ -11,11 +12,19 @@ kEventResult Node::on_event(Event* e)
 {
     kEventResult ret = kEventResult::Available;
     for (auto it = m_children.rbegin(); it != m_children.rend(); ++it)
+    {
         if ((*it)->on_event(e) == kEventResult::Consumed)
+        {
             if (m_flood_events)
+            {
                 ret = kEventResult::Consumed;
+            }
             else
+            {
                 return kEventResult::Consumed;
+            }
+        }
+    }
     if (ret == kEventResult::Consumed)
         return ret;
     switch (e->m_cat)
@@ -51,6 +60,8 @@ kEventResult Node::on_event(Event* e)
                 handle_event(&e2);
             }
             break;
+        default:
+            break;
         }
         break;
     }
@@ -80,12 +91,13 @@ void Node::remove_child(Node* n)
     }
 }
 
-void Node::update(float width, float height)
+void Node::update(float width, float height, float zoom)
 {
-    YGNodeStyleSetWidth(y_node, width);
-    YGNodeStyleSetHeight(y_node, height);
+    m_zoom = zoom;
+    YGNodeStyleSetWidth(y_node, width / zoom);
+    YGNodeStyleSetHeight(y_node, height / zoom);
     YGNodeCalculateLayout(y_node, YGUndefined, YGUndefined, YGDirectionLTR);
-    m_proj = glm::ortho(0.f, width, height, 0.f, -1.f, 1.f);
+    m_proj = glm::ortho(0.f, width / zoom, height / zoom, 0.f, -1.f, 1.f);
     update_internal({ 0, 0 }, m_proj);
 }
 
@@ -462,18 +474,25 @@ void Node::clone_children(Node* dest) const
 
 bool LayoutManager::load(const char* path)
 {
+#ifndef __ANDROID__
     struct stat tmp_info;
     if (stat(path, &tmp_info) != 0)
         return false;
     if (tmp_info.st_mtime <= m_file_info.st_mtime)
         return false;
     m_file_info = tmp_info;
+#endif // __ANDROID__
+
     m_path = path;
 
     auto old = std::move(m_layouts);
 
+    Asset file;
+    if (!(file.open(path) && file.read_all()))
+        return false;
     tinyxml2::XMLDocument xml;
-    auto ret = xml.LoadFile(path);
+    auto ret = xml.Parse((char*)file.m_data, file.m_len);
+    file.close();
     if (ret != tinyxml2::XMLError::XML_SUCCESS)
         return false;
 
diff --git a/engine/layout.h b/engine/layout.h
index a5122c0..303330e 100644
--- a/engine/layout.h
+++ b/engine/layout.h
@@ -3,6 +3,7 @@
 #include "util.h"
 #include "shader.h"
 #include "font.h"
+#include "asset.h"
 
 enum class kAttribute : uint16_t 
 {
@@ -126,6 +127,7 @@ public:
     bool m_flood_events = false;
     bool m_destroyed = false;
 
+    float m_zoom = 1.f;
     glm::vec2 m_pos;
     glm::vec2 m_size;
     glm::vec4 m_clip;
@@ -148,6 +150,7 @@ public:
         m_pos = o.m_pos;
         m_size = o.m_size;
         m_clip = o.m_clip;
+        m_zoom = o.m_zoom;
         o.y_node = nullptr;
         o.parent = nullptr;
     }
@@ -203,7 +206,7 @@ public:
         return o;
     }
 
-    void update(float width, float height);
+    void update(float width, float height, float zoom);
     void update();
     void update_internal(const glm::vec2& origin, const glm::mat4& proj);
     virtual void parse_attributes(kAttribute ka, const tinyxml2::XMLAttribute* attr);
@@ -220,6 +223,13 @@ public:
             c->watch(observer);
     }
     void destroy() { m_destroyed = true; }
+    Node* root() 
+    { 
+        Node* ret = this; 
+        while (ret->parent) 
+            ret = ret->parent; 
+        return ret; 
+    }
 
     template<class T = Node> T* find(const char* ids)
     {
@@ -726,14 +736,22 @@ public:
         // icons: http://www.famfamfam.com/lab/icons/silk/
         // regex css -> spritesheet.txt: \.([^{]+) {\s+width: (\d+)px;\s+height: (\d+)px;\s+.*: -(\d+)px -(\d+)px;\s+}\s+
         // to: "\1",\2,\3,\4,\5\n
-        static char str[256];
+        Asset file;
+        if (!(file.open("data/spritesheet.txt") && file.read_all()))
+            return;
+        char* data = (char*)file.m_data;
+        int size = file.m_len;
+        static char name[256];
         int x, y, w, h;
-        FILE* f = fopen("data/spritesheet.txt", "r");
-        while (!feof(f) && fscanf(f, "%s %d %d %d %d", str, &w, &h, &x, &y) == 5)
+        char* s = strtok(data, "\n");
+        int i = strlen(s) + 1;
+        while (i < size && sscanf(s, "%s %d %d %d %d", name, &w, &h, &x, &y) == 5)
         {
-            m_icons[str] = glm::vec4(x, y, x+w, y+h);
+            m_icons[name] = glm::vec4(x, y, x + w, y + h);
+            s = strtok(nullptr, "\n");
+            i += strlen(s) + 1;
         }
-        fclose(f);
+        file.close();
     }
     virtual Node* clone_instantiate() const override { return new NodeIcon(); }
     virtual void clone_copy(Node* dest) const override
@@ -772,11 +790,14 @@ public:
     std::unique_ptr<Plane> m_faces;
     std::unique_ptr<Sampler> m_sampler;
     uint16_t m_tex_id;
+    glm::vec2 drag_start;
+    glm::vec2 drag_end;
+    bool dragging = false;
+    float angle = 0.0f;
+    float angle_old;
     
     virtual void draw() override 
     {
-        static float angle = 0;
-        angle += 0.05;
         glm::mat4 cam = glm::lookAt(glm::vec3(sinf(angle)*10, 0, -10), glm::vec3(0, 0, 0), glm::vec3(0, -1, 0));
         glm::mat4 proj = glm::perspective<float>(glm::radians(45.f), m_clip.z / m_clip.w, .1f, 100);
 
@@ -787,8 +808,9 @@ public:
 
         glClearColor(1, 0, 0, 1);
         glClear(GL_COLOR_BUFFER_BIT);
-        auto box = m_clip;
-        glViewport(box.x, (int)(vp[3] - box.y - box.w), box.z, box.w);
+        auto box = m_clip * root()->m_zoom;
+        auto c = glm::vec4(box.x, (int)(vp[3] - box.y - box.w), box.z, box.w);
+        glViewport(c.x, c.y, c.z, c.w);
         TextureManager::get(m_tex_id).bind();
         m_sampler->bind(0);
         glEnable(GL_BLEND);
@@ -816,4 +838,29 @@ public:
         TextureManager::load("data/uvs.jpg");
         m_tex_id = const_hash("data/uvs.jpg");
     }
+    virtual kEventResult handle_event(Event* e) override
+    {
+        Node::handle_event(e);
+        switch (e->m_type)
+        {
+        case kEventType::MouseDownL:
+            dragging = true;
+            drag_end = drag_start = ((MouseEvent*)e)->m_pos;
+            angle_old = angle;
+            break;
+        case kEventType::MouseUpL:
+            dragging = false;
+            break;
+        case kEventType::MouseMove:
+            if (dragging)
+            {
+                drag_end = ((MouseEvent*)e)->m_pos;
+                angle = angle_old + (drag_end - drag_start).x * .01f;
+            }
+            break;
+        default:
+            break;
+        }
+        return kEventResult::Consumed;
+    }
 };
diff --git a/engine/pch.h b/engine/pch.h
index 032be19..6c01c82 100644
--- a/engine/pch.h
+++ b/engine/pch.h
@@ -1,5 +1,8 @@
 //#pragma once
 
+#define USE_VBO 0
+#define USE_SAMPLER 1
+
 #ifdef __APPLE__
     #include <OpenGL/gl3.h>
     #include <sys/stat.h>
diff --git a/engine/shader.cpp b/engine/shader.cpp
index 44632aa..02b85f5 100644
--- a/engine/shader.cpp
+++ b/engine/shader.cpp
@@ -22,7 +22,7 @@ bool Shader::create(const char* vertex, const char* fragment)
     glGetShaderiv(vs, GL_COMPILE_STATUS, &status);
     glGetShaderInfoLog(vs, sizeof(infolog), &infolen, infolog);
     if (infolen > 0)
-        printf("VERTEX SHADER:\n%s", infolog);
+        LOG("VERTEX SHADER:\n%s", infolog);
     if (status == 0)
     {
         glDeleteShader(vs);
@@ -41,7 +41,7 @@ bool Shader::create(const char* vertex, const char* fragment)
     glGetShaderiv(fs, GL_COMPILE_STATUS, &status);
     glGetShaderInfoLog(fs, sizeof(infolog), &infolen, infolog);
     if (infolen > 0)
-        printf("FRAGMENT SHADER:\n%s", infolog);
+        LOG("FRAGMENT SHADER:\n%s", infolog);
     if (status == 0)
     {
         glDeleteShader(vs);
@@ -68,7 +68,7 @@ bool Shader::create(const char* vertex, const char* fragment)
     glGetProgramiv(ps, GL_LINK_STATUS, &status);
     glGetProgramInfoLog(ps, sizeof(infolog), &infolen, infolog);
     if (infolen > 0)
-        printf("LINK SHADER:\n%s", infolog);
+        LOG("LINK SHADER:\n%s", infolog);
     if (status == 0)
     {
         glDeleteProgram(ps);
diff --git a/engine/shape.cpp b/engine/shape.cpp
index 114d47f..678b09b 100644
--- a/engine/shape.cpp
+++ b/engine/shape.cpp
@@ -14,10 +14,10 @@ bool Shape::create_buffers(GLvoid* idx, GLvoid* vertices, int isize, int vsize)
     glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
     glBindBuffer(GL_ARRAY_BUFFER, 0);
     
+#if USE_VBO
     glGenVertexArrays(2, arrays);
     if (!(arrays[0] && arrays[1]))
         return false;
-    
     for (int i = 0; i < 2; i++)
     {
         glBindVertexArray(arrays[i]);
@@ -28,21 +28,43 @@ bool Shape::create_buffers(GLvoid* idx, GLvoid* vertices, int isize, int vsize)
         glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (GLvoid*)0);
         glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (GLvoid*)offsetof(vertex_t, uvs));
     }
-    
     glBindVertexArray(0);
+#endif
     return true;
 }
 void Shape::draw_fill() const
 {
+#if USE_VBO
     glBindVertexArray(arrays[0]);
     glDrawElements(GL_TRIANGLES, count[0], GL_UNSIGNED_SHORT, ioff[0]);
     glBindVertexArray(0);
+#else
+    glEnableVertexAttribArray(0);
+    glEnableVertexAttribArray(1);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffers[1]);
+    glBindBuffer(GL_ARRAY_BUFFER, buffers[0]);
+    glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (GLvoid*)0);
+    glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (GLvoid*)offsetof(vertex_t, uvs));
+    glDrawElements(GL_TRIANGLES, count[0], GL_UNSIGNED_SHORT, ioff[0]);
+    glBindBuffer(GL_ARRAY_BUFFER, 0);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+#endif // USE_VBO
 }
 void Shape::draw_stroke() const
 {
+#if USE_VBO
     glBindVertexArray(arrays[1]);
     glDrawElements(GL_LINES, count[1], GL_UNSIGNED_SHORT, ioff[1]);
     glBindVertexArray(0);
+#else
+    glEnableVertexAttribArray(0);
+    glEnableVertexAttribArray(1);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffers[1]);
+    glBindBuffer(GL_ARRAY_BUFFER, buffers[0]);
+    glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (GLvoid*)0);
+    glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (GLvoid*)offsetof(vertex_t, uvs));
+    glDrawElements(GL_LINES, count[1], GL_UNSIGNED_SHORT, ioff[1]);
+#endif // USE_VBO
 }
 
 bool RectShape::create(float w, float h)
diff --git a/engine/shape.h b/engine/shape.h
index 617e120..2fd7674 100644
--- a/engine/shape.h
+++ b/engine/shape.h
@@ -16,7 +16,9 @@ public:
     ~Shape()
     {
         glDeleteBuffers(2, buffers);
+#if USE_VBO
         glDeleteVertexArrays(2, arrays);
+#endif // USE_VBO
     }
 protected:
     glm::vec2 quad_mid_point(glm::vec2 a, glm::vec2 b, glm::vec2 c, glm::vec2 d)
diff --git a/engine/texture.cpp b/engine/texture.cpp
index 807cb2a..f8fe33b 100644
--- a/engine/texture.cpp
+++ b/engine/texture.cpp
@@ -33,7 +33,7 @@ bool Texture2D::create(int width, int height, GLint format, const uint8_t* data)
 }
 bool Texture2D::create(const Image& img)
 {
-    static GLint formats[] = { GL_RED, GL_RG, GL_RGB, GL_RGBA };
+    static GLint formats[] = { 0, 0, GL_RGB, GL_RGBA };
     return create(img.width, img.height, formats[img.comp - 1], img.data());
 }
 bool Texture2D::load(std::string filename)
@@ -56,7 +56,9 @@ glm::vec2 Texture2D::size() const
 
 bool Sampler::create(GLint filter /*= GL_LINEAR*/, GLint wrap /*= GL_CLAMP_TO_EDGE*/)
 {
+#if USE_SAMPLER
     glGenSamplers(1, &id);
+#endif // USE_SAMPLER
     if (id == 0)
         return false;
     set(filter, wrap);
@@ -64,18 +66,24 @@ bool Sampler::create(GLint filter /*= GL_LINEAR*/, GLint wrap /*= GL_CLAMP_TO_ED
 }
 void Sampler::set(GLint filter /*= GL_LINEAR*/, GLint wrap /*= GL_CLAMP_TO_EDGE*/)
 {
+#if USE_SAMPLER
     glSamplerParameteri(id, GL_TEXTURE_WRAP_S, wrap);
     glSamplerParameteri(id, GL_TEXTURE_WRAP_T, wrap);
     glSamplerParameteri(id, GL_TEXTURE_MIN_FILTER, filter);
     glSamplerParameteri(id, GL_TEXTURE_MAG_FILTER, filter);
+#endif // USE_SAMPLER
 }
 void Sampler::bind(int unit)
 {
     current_unit = unit;
+#if USE_SAMPLER
     glBindSampler(unit, id);
+#endif // USE_SAMPLER
 }
 void Sampler::unbind()
 {
+#if USE_SAMPLER
     glBindSampler(current_unit, 0);
+#endif // USE_SAMPLER
 }