diff --git a/android/src/main/java/com/projectseptember/RNGL/GLCanvas.java b/android/src/main/java/com/projectseptember/RNGL/GLCanvas.java
index 9a5815d8179d6194ece7b8894c5e5e915ee76b3f..b432e7e2a4fedb38ae05d64c3dd4cfa378a54226 100644
--- a/android/src/main/java/com/projectseptember/RNGL/GLCanvas.java
+++ b/android/src/main/java/com/projectseptember/RNGL/GLCanvas.java
@@ -4,6 +4,7 @@ import static android.opengl.GLES20.*;
 
 import android.graphics.Bitmap;
 import android.graphics.PixelFormat;
+import android.net.Uri;
 import android.opengl.GLSurfaceView;
 import android.util.DisplayMetrics;
 import android.util.Log;
@@ -49,11 +50,10 @@ public class GLCanvas extends GLSurfaceView implements GLSurfaceView.Renderer, R
     private boolean visibleContent;
     private int captureNextFrameId;
     private GLData data;
-    private ReadableArray imagesToPreload; // TODO we need to make a List<Uri> I guess? probably Uri should be resolved in advance. not in GLImage
+    private List<Uri> imagesToPreload;
+    private List<Uri> preloaded;
 
-    List<String> preloaded; // TODO List<Uri>
-
-    private Map<String, GLImage> images = new HashMap<>();
+    private Map<Uri, GLImage> images = new HashMap<>();
     private List<GLTexture> contentTextures = new ArrayList<>();
     private List<Bitmap> contentBitmaps = new ArrayList<>();
 
@@ -69,16 +69,13 @@ public class GLCanvas extends GLSurfaceView implements GLSurfaceView.Renderer, R
         getHolder().setFormat(PixelFormat.RGBA_8888);
         setRenderer(this);
         setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);
-        Log.i("GLCanvas", "created");
     }
 
     @Override
     protected void onAttachedToWindow() {
-        Log.i("GLCanvas", "onAttachedToWindow");
         super.onAttachedToWindow();
         syncContentBitmaps();
         requestRender();
-        preloadingDone = true; // TODO
     }
 
     @Override
@@ -93,7 +90,6 @@ public class GLCanvas extends GLSurfaceView implements GLSurfaceView.Renderer, R
 
     @Override
     public void onDrawFrame(GL10 gl) {
-        Log.i("GLCanvas", "onDrawFrame");
         runAll(mRunOnDraw);
 
         syncEventsThrough(); // FIXME, really need to do this ?
@@ -200,9 +196,12 @@ public class GLCanvas extends GLSurfaceView implements GLSurfaceView.Renderer, R
     }
 
 
-    public void setImagesToPreload(ReadableArray imagesToPreload) {
-        // FIXME setImageToPreload, working correctly?
+    public void setImagesToPreload (ReadableArray imagesToPreloadRA) {
         if (preloadingDone) return;
+        List<Uri> imagesToPreload = new ArrayList<>();
+        for (int i=0; i<imagesToPreloadRA.size(); i++) {
+            imagesToPreload.add(resolveSrc(imagesToPreloadRA.getString(i)));
+        }
         if (imagesToPreload.size() == 0) {
             dispatchOnLoad();
             preloadingDone = true;
@@ -210,7 +209,6 @@ public class GLCanvas extends GLSurfaceView implements GLSurfaceView.Renderer, R
         else {
             preloadingDone = false;
         }
-
         this.imagesToPreload = imagesToPreload;
     }
 
@@ -234,7 +232,6 @@ public class GLCanvas extends GLSurfaceView implements GLSurfaceView.Renderer, R
     public void requestSyncData () {
         runInGLThread(new Runnable() {
             public void run() {
-                Log.i("GLCanvas", "requestSyncData");
                 if (ensureCompiledShader(data))
                     syncData();
                 else
@@ -287,15 +284,15 @@ public class GLCanvas extends GLSurfaceView implements GLSurfaceView.Renderer, R
 
     private int countPreloaded () {
         int nb = 0;
-        for (int i=0; i<imagesToPreload.size(); i++) {/*
-            if ([_preloaded containsObject:srcResource(toload)]) // TODO
-            nb++;
-            */
+        for (Uri toload: imagesToPreload) {
+            if (preloaded.contains(toload)) {
+                nb++;
+            }
         }
         return nb;
     }
 
-    private void onImageLoad (String loaded) {
+    private void onImageLoad (Uri loaded) {
         if (!preloadingDone) {
             preloaded.add(loaded);
             int count = countPreloaded();
@@ -314,17 +311,35 @@ public class GLCanvas extends GLSurfaceView implements GLSurfaceView.Renderer, R
         }
     }
 
+    public Uri resolveSrc (String src) {
+        Uri uri = null;
+        if (src != null) {
+            try {
+                uri = Uri.parse(src);
+                // Verify scheme is set, so that relative uri (used by static resources) are not handled.
+                if (uri.getScheme() == null) {
+                    uri = null;
+                }
+            } catch (Exception e) {
+                // ignore malformed uri, then attempt to extract resource ID.
+            }
+            if (uri == null) {
+                uri = GLImage.getResourceDrawableUri(reactContext, src);
+            }
+        }
+        return uri;
+    }
 
-    public String srcResource (ReadableMap res) {
+    public Uri srcResource (ReadableMap res) {
         String src = null;
         boolean isStatic = res.hasKey("isStatic") && res.getBoolean("isStatic");
         if (res.hasKey("path")) src = res.getString("path");
         if (src==null || isStatic) src = res.getString("uri");
-        return src;
+        return resolveSrc(src);
     }
 
-    public GLRenderData recSyncData (GLData data, HashMap<String, GLImage> images) {
-        Map<String, GLImage> prevImages = this.images;
+    public GLRenderData recSyncData (GLData data, HashMap<Uri, GLImage> images) {
+        Map<Uri, GLImage> prevImages = this.images;
 
         GLShader shader = rnglContext.getShader(data.shader);
         Map<String, Integer> uniformsInteger = new HashMap<>();
@@ -368,6 +383,9 @@ public class GLCanvas extends GLSurfaceView implements GLSurfaceView.Renderer, R
                     String t = value.getString("type");
                     if (t.equals("content")) {
                         int id = value.getInt("id");
+                        if (id >= contentTextures.size()) {
+                            resizeUniformContentTextures(id+1);
+                        }
                         textures.put(uniformName, contentTextures.get(id));
                     }
                     else if (t.equals("fbo")) {
@@ -376,8 +394,8 @@ public class GLCanvas extends GLSurfaceView implements GLSurfaceView.Renderer, R
                         textures.put(uniformName, fbo.color.get(0));
                     }
                     else if (t.equals("uri")) {
-                        final String src = srcResource(value);
-                        if (src==null || src.equals("")) {
+                        final Uri src = srcResource(value);
+                        if (src == null) {
                             shader.runtimeException("texture uniform '"+uniformName+"': Invalid uri format '"+value+"'");
                         }
 
@@ -539,16 +557,13 @@ public class GLCanvas extends GLSurfaceView implements GLSurfaceView.Renderer, R
     }
 
     public void syncData () {
-        Log.i("GLCanvas", "syncData "+data);
         if (data == null) return;
-        HashMap<String, GLImage> images = new HashMap<>();
+        HashMap<Uri, GLImage> images = new HashMap<>();
         renderData = recSyncData(data, images);
         this.images = images;
-        this.requestRender(); // FIXME don't do it here since syncData is called in render phase
     }
 
     public void recRender (GLRenderData renderData) {
-        Log.i("GLCanvas", "recRender "+renderData.fboId);
         DisplayMetrics dm = reactContext.getResources().getDisplayMetrics();
 
         int w = Float.valueOf(renderData.width.floatValue() * dm.density).intValue();
@@ -576,7 +591,6 @@ public class GLCanvas extends GLSurfaceView implements GLSurfaceView.Renderer, R
             GLTexture texture = renderData.textures.get(uniformName);
             int unit = renderData.uniformsInteger.get(uniformName);
             texture.bind(unit);
-            Log.i("GLCanvas", uniformName+" "+unit);
         }
 
         Map<String, Integer> uniformTypes = renderData.shader.getUniformTypes();
@@ -601,8 +615,8 @@ public class GLCanvas extends GLSurfaceView implements GLSurfaceView.Renderer, R
 
     public void render () {
         if (renderData == null) return;
-        syncContentTextures();
         Log.i("GLCanvas", "render");
+        syncContentTextures();
 
         int[] defaultFBOArr = new int[1];
         glGetIntegerv(GL_FRAMEBUFFER_BINDING, defaultFBOArr, 0);
diff --git a/android/src/main/java/com/projectseptember/RNGL/GLCanvasManager.java b/android/src/main/java/com/projectseptember/RNGL/GLCanvasManager.java
index 2134691fb8a0ea8c2551edd722fa4a8188ebb977..7c16e551b7acc0268daabd6e04f7b151a7db5e73 100644
--- a/android/src/main/java/com/projectseptember/RNGL/GLCanvasManager.java
+++ b/android/src/main/java/com/projectseptember/RNGL/GLCanvasManager.java
@@ -1,7 +1,6 @@
 package com.projectseptember.RNGL;
 
 import android.support.annotation.Nullable;
-import android.util.Log;
 
 import com.facebook.react.bridge.ReadableArray;
 import com.facebook.react.bridge.ReadableMap;
@@ -65,7 +64,6 @@ public class GLCanvasManager extends SimpleViewManager<GLCanvas> {
 
     @Override
     public GLCanvas createViewInstance (ThemedReactContext context) {
-        Log.i("GLCanvas", "createViewInstance...");
         return new GLCanvas(context);
     }
 }
diff --git a/android/src/main/java/com/projectseptember/RNGL/GLFBO.java b/android/src/main/java/com/projectseptember/RNGL/GLFBO.java
index b5f6009dd1de34e18c7348be5e1fadfa495e9a8e..006fdb51bd4f9af538f2cbb40f24f73ef6ab87c6 100644
--- a/android/src/main/java/com/projectseptember/RNGL/GLFBO.java
+++ b/android/src/main/java/com/projectseptember/RNGL/GLFBO.java
@@ -1,7 +1,5 @@
 package com.projectseptember.RNGL;
 
-import android.util.Log;
-
 import java.util.ArrayList;
 import java.util.List;
 
@@ -21,47 +19,23 @@ public class GLFBO {
         return texture;
     }
 
-    /*
-    int initRenderBuffer (int width, int height, int component, int attachment)
-    {
-        int[] handleArr = new int[1];
-        glGenRenderbuffers(1, handleArr, 0);
-        int handle = handleArr[0];
-        glBindRenderbuffer(GL_RENDERBUFFER, handle);
-        glRenderbufferStorage(GL_RENDERBUFFER, component, width, height);
-        glFramebufferRenderbuffer(GL_FRAMEBUFFER, attachment, GL_RENDERBUFFER, handle);
-        return handle;
-    }
-    */
-
-    /*
     class FBOState {
 
         private int fbo;
-        private int rbo;
-        private int tex;
 
         public FBOState() {
-            int[] fbo = new int[1], rbo = new int[1], tex = new int[1];
+            int[] fbo = new int[1];
             glGetIntegerv(GL_FRAMEBUFFER_BINDING, fbo, 0);
-            glGetIntegerv(GL_RENDERBUFFER_BINDING, rbo, 0);
-            glGetIntegerv(GL_TEXTURE_BINDING_2D, tex, 0);
             this.fbo = fbo[0];
-            this.rbo = rbo[0];
-            this.tex = tex[0];
         }
 
         private void restore() {
             glBindFramebuffer(GL_FRAMEBUFFER, fbo);
-            glBindRenderbuffer(GL_FRAMEBUFFER, rbo);
-            glBindTexture(GL_FRAMEBUFFER, tex);
         }
     }
-    */
 
     public GLFBO() {
-        Log.i("GLFBO", "new");
-        //FBOState state = new FBOState();
+        FBOState state = new FBOState();
 
         int[] handleArr = new int[1];
         glGenFramebuffers(1, handleArr, 0);
@@ -74,12 +48,11 @@ public class GLFBO {
         for(int i=0; i<numColors; ++i) {
             color.add(initTexture(width, height, GL_COLOR_ATTACHMENT0 + i));
         }
-        // state.restore();
+        state.restore();
     }
 
     @Override
     protected void finalize() throws Throwable {
-        Log.i("GLFBO", "finalize");
         super.finalize();
         int[] handleArr = new int[] { handle };
         glDeleteFramebuffers(1, handleArr, 0);
@@ -105,13 +78,11 @@ public class GLFBO {
     }
 
     public void bind () {
-        Log.i("GLFBO", "bind");
         glBindFramebuffer(GL_FRAMEBUFFER, handle);
         glViewport(0, 0, width, height);
     }
 
     public void setShape(int w, int h) {
-        Log.i("GLFBO", "setShape "+w+" "+h);
         if (w == width && h == height) return;
         int[] maxFBOSize = new int[1];
         glGetIntegerv(GL_MAX_RENDERBUFFER_SIZE, maxFBOSize, 0);
@@ -121,7 +92,7 @@ public class GLFBO {
         width = w;
         height = h;
 
-        //FBOState state = new FBOState();
+        FBOState state = new FBOState();
 
         for (GLTexture clr: color) {
             clr.setShape(w, h);
@@ -130,6 +101,6 @@ public class GLFBO {
         glBindFramebuffer(GL_FRAMEBUFFER, handle);
         checkStatus();
 
-        //state.restore();
+        state.restore();
     }
 }
diff --git a/android/src/main/java/com/projectseptember/RNGL/GLImage.java b/android/src/main/java/com/projectseptember/RNGL/GLImage.java
index e291ecc52813695575413133086164d5bd31056f..86e1da0d85bc17d438c06812a77a58e04afa769c 100644
--- a/android/src/main/java/com/projectseptember/RNGL/GLImage.java
+++ b/android/src/main/java/com/projectseptember/RNGL/GLImage.java
@@ -24,11 +24,9 @@ https://github.com/CyberAgent/android-gpuimage/blob/master/library/src/jp/co/cyb
  */
 public class GLImage {
     private final Context context;
-    private String src;
+    private Uri src;
     private GLTexture texture;
 
-    private Uri uri;
-    private boolean isLocalImage;
     private boolean isDirty;
     private AsyncTask<Void, Void, Bitmap> task;
     private Runnable onload;
@@ -41,31 +39,13 @@ public class GLImage {
         this.texture = new GLTexture();
     }
 
-    public void setSrc(String src) {
+    public void setSrc(Uri src) {
         if (this.src == src) return;
         this.src = src;
         reloadImage();
     }
 
     private void reloadImage () {
-        uri = null;
-        if (src != null) {
-            try {
-                uri = Uri.parse(src);
-                // Verify scheme is set, so that relative uri (used by static resources) are not handled.
-                if (uri.getScheme() == null) {
-                    uri = null;
-                }
-            } catch (Exception e) {
-                // ignore malformed uri, then attempt to extract resource ID.
-            }
-            if (uri == null) {
-                uri = getResourceDrawableUri(context, src);
-                isLocalImage = true;
-            } else {
-                isLocalImage = false;
-            }
-        }
         isDirty = true;
     }
 
@@ -81,13 +61,13 @@ public class GLImage {
     public GLTexture getTexture() {
         if (isDirty) {
             if (task != null) task.cancel(true);
-            task = new LoadImageUriTask(this, uri).execute();
+            task = new LoadImageUriTask(this, src).execute();
             isDirty = false;
         }
         return texture;
     }
 
-    private static @Nullable Uri getResourceDrawableUri(Context context, @Nullable String name) {
+    public static @Nullable Uri getResourceDrawableUri(Context context, @Nullable String name) {
         if (name == null || name.isEmpty()) {
             return null;
         }
diff --git a/android/src/main/java/com/projectseptember/RNGL/RNGLContext.java b/android/src/main/java/com/projectseptember/RNGL/RNGLContext.java
index 6e9233c7632cd465f2cd7212dca910febf6894bd..4eb4814849e6b57ea5f72eea3cb09323f0aca85f 100644
--- a/android/src/main/java/com/projectseptember/RNGL/RNGLContext.java
+++ b/android/src/main/java/com/projectseptember/RNGL/RNGLContext.java
@@ -1,5 +1,7 @@
 package com.projectseptember.RNGL;
 
+import android.opengl.GLES20;
+
 import com.facebook.react.bridge.ReactApplicationContext;
 import com.facebook.react.bridge.ReactContextBaseJavaModule;
 import com.facebook.react.bridge.ReactMethod;