Add RenderScript fragment shader test

Change-Id: I03328a610c8eae6bb6d63ecbc4104d55997664cc

10 files changed, 681 insertions, 0 deletions

diff --git a/tests/RenderScriptTests/ShadersTest/Android.mk b/tests/RenderScriptTests/ShadersTest/Android.mk
new file mode 100644
index 0000000..109b0a0
--- /dev/null
+++ b/tests/RenderScriptTests/ShadersTest/Android.mk
@@ -0,0 +1,26 @@
+#
+# Copyright (C) 2011 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+LOCAL_PATH := $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_SRC_FILES := $(call all-java-files-under, src) $(call all-renderscript-files-under, src)
+
+LOCAL_PACKAGE_NAME := ShadersTest
+
+include $(BUILD_PACKAGE)
diff --git a/tests/RenderScriptTests/ShadersTest/AndroidManifest.xml b/tests/RenderScriptTests/ShadersTest/AndroidManifest.xml
new file mode 100644
index 0000000..871200d
--- /dev/null
+++ b/tests/RenderScriptTests/ShadersTest/AndroidManifest.xml
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2011 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+  
+          http://www.apache.org/licenses/LICENSE-2.0
+  
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.android.shaderstest">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+    
+    <application android:label="_ShadersTest">
+        <activity android:name="ShadersTest"
+                  android:label="_ShadersTest"
+                  android:theme="@android:style/Theme.Black.NoTitleBar">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>
diff --git a/tests/RenderScriptTests/ShadersTest/res/drawable-nodpi/robot.png b/tests/RenderScriptTests/ShadersTest/res/drawable-nodpi/robot.png
new file mode 100644
index 0000000..f7353fd
--- /dev/null
+++ b/tests/RenderScriptTests/ShadersTest/res/drawable-nodpi/robot.png
diff --git a/tests/RenderScriptTests/ShadersTest/res/raw/depth_fs.glsl b/tests/RenderScriptTests/ShadersTest/res/raw/depth_fs.glsl
new file mode 100644
index 0000000..096843b
--- /dev/null
+++ b/tests/RenderScriptTests/ShadersTest/res/raw/depth_fs.glsl
@@ -0,0 +1,13 @@
+void main() {
+    // Non-linear depth value
+    float z = gl_FragCoord.z;
+    // Near and far planes from the projection
+    // In practice, these values can be used to tweak
+    // the focus range
+    float n = UNI_near;
+    float f = UNI_far;
+    // Linear depth value
+    z = (2.0 * n) / (f + n - z * (f - n));
+
+    gl_FragColor = vec4(z, z, z, 1.0);
+}
diff --git a/tests/RenderScriptTests/ShadersTest/res/raw/robot.a3d b/tests/RenderScriptTests/ShadersTest/res/raw/robot.a3d
new file mode 100644
index 0000000..f48895c
--- /dev/null
+++ b/tests/RenderScriptTests/ShadersTest/res/raw/robot.a3d
diff --git a/tests/RenderScriptTests/ShadersTest/res/raw/vignette_fs.glsl b/tests/RenderScriptTests/ShadersTest/res/raw/vignette_fs.glsl
new file mode 100644
index 0000000..2dc1ea3
--- /dev/null
+++ b/tests/RenderScriptTests/ShadersTest/res/raw/vignette_fs.glsl
@@ -0,0 +1,31 @@
+#define CRT_MASK
+
+varying vec2 varTex0;
+
+void main() {
+    lowp vec4 color = texture2D(UNI_Tex0, varTex0);
+    
+    vec2 powers = pow(abs((gl_FragCoord.xy / vec2(UNI_width, UNI_height)) - 0.5), vec2(2.0));
+    float gradient = smoothstep(UNI_size - UNI_feather, UNI_size + UNI_feather,
+            powers.x + powers.y);
+
+    color = vec4(mix(color.rgb, vec3(0.0), gradient), 1.0);
+
+#ifdef CRT_MASK
+    float vShift = gl_FragCoord.y;
+    if (mod(gl_FragCoord.x, 6.0) >= 3.0) {
+        vShift += 2.0;
+    }
+
+    lowp vec3 r = vec3(0.95, 0.0, 0.2);
+    lowp vec3 g = vec3(0.2, 0.95, 0.0);
+    lowp vec3 b = vec3(0.0, 0.2, 0.95);
+    int channel = int(floor(mod(gl_FragCoord.x, 3.0)));
+    lowp vec4 crt = vec4(r[channel], g[channel], b[channel], 1.0);
+    crt *= clamp(floor(mod(vShift, 4.0)), 0.0, 1.0);
+    
+    color = (crt * color * 1.25) + 0.05;
+#endif
+
+    gl_FragColor = color;
+}
diff --git a/tests/RenderScriptTests/ShadersTest/src/com/android/shaderstest/ShadersTest.java b/tests/RenderScriptTests/ShadersTest/src/com/android/shaderstest/ShadersTest.java
new file mode 100644
index 0000000..6803fbb
--- /dev/null
+++ b/tests/RenderScriptTests/ShadersTest/src/com/android/shaderstest/ShadersTest.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.shaderstest;
+
+import android.app.Activity;
+import android.os.Bundle;
+
+@SuppressWarnings({"UnusedDeclaration"})
+public class ShadersTest extends Activity {
+
+    private ShadersTestView mView;
+
+    @Override
+    public void onCreate(Bundle icicle) {
+        super.onCreate(icicle);
+
+        mView = new ShadersTestView(this);
+        setContentView(mView);
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        mView.resume();
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        mView.pause();
+    }
+}
diff --git a/tests/RenderScriptTests/ShadersTest/src/com/android/shaderstest/ShadersTestRS.java b/tests/RenderScriptTests/ShadersTest/src/com/android/shaderstest/ShadersTestRS.java
new file mode 100644
index 0000000..dad97e2
--- /dev/null
+++ b/tests/RenderScriptTests/ShadersTest/src/com/android/shaderstest/ShadersTestRS.java
@@ -0,0 +1,202 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.shaderstest;
+
+import android.content.res.Resources;
+import android.renderscript.Allocation;
+import android.renderscript.Element;
+import android.renderscript.Element.DataKind;
+import android.renderscript.Element.DataType;
+import android.renderscript.FileA3D;
+import android.renderscript.Mesh;
+import android.renderscript.Program;
+import android.renderscript.ProgramFragment;
+import android.renderscript.ProgramFragmentFixedFunction;
+import android.renderscript.ProgramStore;
+import android.renderscript.ProgramStore.DepthFunc;
+import android.renderscript.ProgramVertex;
+import android.renderscript.ProgramVertexFixedFunction;
+import android.renderscript.RSRuntimeException;
+import android.renderscript.RenderScriptGL;
+import android.renderscript.Sampler;
+import android.renderscript.Type.Builder;
+
+@SuppressWarnings({"FieldCanBeLocal"})
+public class ShadersTestRS {
+    public ShadersTestRS() {
+    }
+
+    public void init(RenderScriptGL rs, Resources res) {
+        mRS = rs;
+        mRes = res;
+        initRS();
+    }
+
+    public void surfaceChanged() {
+        initBuffers(mRS.getWidth(), mRS.getHeight());
+    }
+
+    private Resources mRes;
+    private RenderScriptGL mRS;
+    private Sampler mLinearClamp;
+    private Sampler mNearestClamp;
+    private ProgramStore mPSBackground;
+    private ProgramFragment mPFBackground;
+    private ProgramVertex mPVBackground;
+    private ProgramVertexFixedFunction.Constants mPVA;
+
+    private ProgramFragment mPFVignette;
+    private ScriptField_VignetteConstants_s mFSVignetteConst;
+
+    private Allocation mMeshTexture;
+    private Allocation mScreen;
+    private Allocation mScreenDepth;
+
+    private ScriptField_MeshInfo mMeshes;
+    private ScriptC_shaderstest mScript;
+
+
+    public void onActionDown(float x, float y) {
+        mScript.invoke_onActionDown(x, y);
+    }
+
+    public void onActionScale(float scale) {
+        mScript.invoke_onActionScale(scale);
+    }
+
+    public void onActionMove(float x, float y) {
+        mScript.invoke_onActionMove(x, y);
+    }
+
+    private void initPFS() {
+        ProgramStore.Builder b = new ProgramStore.Builder(mRS);
+
+        b.setDepthFunc(DepthFunc.LESS);
+        b.setDitherEnabled(false);
+        b.setDepthMaskEnabled(true);
+        mPSBackground = b.create();
+
+        mScript.set_gPFSBackground(mPSBackground);
+    }
+
+    private void initPF() {
+        mLinearClamp = Sampler.CLAMP_LINEAR(mRS);
+        mScript.set_gLinear(mLinearClamp);
+
+        mNearestClamp = Sampler.CLAMP_NEAREST(mRS);
+        mScript.set_gNearest(mNearestClamp);
+
+        ProgramFragmentFixedFunction.Builder b = new ProgramFragmentFixedFunction.Builder(mRS);
+        b.setTexture(ProgramFragmentFixedFunction.Builder.EnvMode.REPLACE,
+                     ProgramFragmentFixedFunction.Builder.Format.RGBA, 0);
+        mPFBackground = b.create();
+        mPFBackground.bindSampler(mLinearClamp, 0);
+        mScript.set_gPFBackground(mPFBackground);
+
+        mFSVignetteConst = new ScriptField_VignetteConstants_s(mRS, 1);
+        mScript.bind_gFSVignetteConstants(mFSVignetteConst);
+
+        ProgramFragment.Builder fs;
+
+        fs = new ProgramFragment.Builder(mRS);
+        fs.setShader(mRes, R.raw.vignette_fs);
+        fs.addConstant(mFSVignetteConst.getAllocation().getType());
+        fs.addTexture(Program.TextureType.TEXTURE_2D);
+        mPFVignette = fs.create();
+        mPFVignette.bindConstants(mFSVignetteConst.getAllocation(), 0);
+        mScript.set_gPFVignette(mPFVignette);
+    }
+
+    private void initPV() {
+        ProgramVertexFixedFunction.Builder pvb = new ProgramVertexFixedFunction.Builder(mRS);
+        mPVBackground = pvb.create();
+
+        mPVA = new ProgramVertexFixedFunction.Constants(mRS);
+        ((ProgramVertexFixedFunction) mPVBackground).bindConstants(mPVA);
+
+        mScript.set_gPVBackground(mPVBackground);
+    }
+
+    private void loadImage() {
+        mMeshTexture = Allocation.createFromBitmapResource(mRS, mRes, R.drawable.robot,
+                Allocation.MipmapControl.MIPMAP_ON_SYNC_TO_TEXTURE,
+                Allocation.USAGE_GRAPHICS_TEXTURE);
+        mScript.set_gTMesh(mMeshTexture);
+    }
+
+    private void initMeshes(FileA3D model) {
+        int numEntries = model.getIndexEntryCount();
+        int numMeshes = 0;
+        for (int i = 0; i < numEntries; i ++) {
+            FileA3D.IndexEntry entry = model.getIndexEntry(i);
+            if (entry != null && entry.getEntryType() == FileA3D.EntryType.MESH) {
+                numMeshes ++;
+            }
+        }
+
+        if (numMeshes > 0) {
+            mMeshes = new ScriptField_MeshInfo(mRS, numMeshes);
+
+            for (int i = 0; i < numEntries; i ++) {
+                FileA3D.IndexEntry entry = model.getIndexEntry(i);
+                if (entry != null && entry.getEntryType() == FileA3D.EntryType.MESH) {
+                    Mesh mesh = entry.getMesh();
+                    mMeshes.set_mMesh(i, mesh, false);
+                    mMeshes.set_mNumIndexSets(i, mesh.getPrimitiveCount(), false);
+                }
+            }
+            mMeshes.copyAll();
+        } else {
+            throw new RSRuntimeException("No valid meshes in file");
+        }
+
+        mScript.bind_gMeshes(mMeshes);
+        mScript.invoke_updateMeshInfo();
+    }
+
+    private void initRS() {
+        mScript = new ScriptC_shaderstest(mRS, mRes, R.raw.shaderstest);
+
+        initPFS();
+        initPF();
+        initPV();
+
+        loadImage();
+
+        initBuffers(1, 1);
+
+        FileA3D model = FileA3D.createFromResource(mRS, mRes, R.raw.robot);
+        initMeshes(model);
+
+        mRS.bindRootScript(mScript);
+    }
+
+    private void initBuffers(int width, int height) {
+        Builder b;
+        b = new Builder(mRS, Element.RGBA_8888(mRS));
+        b.setX(width).setY(height);
+        mScreen = Allocation.createTyped(mRS, b.create(),
+                Allocation.USAGE_GRAPHICS_TEXTURE | Allocation.USAGE_GRAPHICS_RENDER_TARGET);
+        mScript.set_gScreen(mScreen);
+
+        b = new Builder(mRS, Element.createPixel(mRS, DataType.UNSIGNED_16, DataKind.PIXEL_DEPTH));
+        b.setX(width).setY(height);
+        mScreenDepth = Allocation.createTyped(mRS, b.create(),
+                Allocation.USAGE_GRAPHICS_RENDER_TARGET);
+        mScript.set_gScreenDepth(mScreenDepth);
+    }
+}
diff --git a/tests/RenderScriptTests/ShadersTest/src/com/android/shaderstest/ShadersTestView.java b/tests/RenderScriptTests/ShadersTest/src/com/android/shaderstest/ShadersTestView.java
new file mode 100644
index 0000000..e0a540f
--- /dev/null
+++ b/tests/RenderScriptTests/ShadersTest/src/com/android/shaderstest/ShadersTestView.java
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.shaderstest;
+
+import android.content.Context;
+import android.renderscript.RSSurfaceView;
+import android.renderscript.RenderScriptGL;
+import android.view.MotionEvent;
+import android.view.ScaleGestureDetector;
+import android.view.SurfaceHolder;
+
+public class ShadersTestView extends RSSurfaceView {
+
+    private RenderScriptGL mRS;
+    private ShadersTestRS mRender;
+
+    private ScaleGestureDetector mScaleDetector;
+
+    private static final int INVALID_POINTER_ID = -1;
+    private int mActivePointerId = INVALID_POINTER_ID;
+
+    public ShadersTestView(Context context) {
+        super(context);
+        ensureRenderScript();
+        mScaleDetector = new ScaleGestureDetector(context, new ScaleListener());
+    }
+
+    private void ensureRenderScript() {
+        if (mRS == null) {
+            RenderScriptGL.SurfaceConfig sc = new RenderScriptGL.SurfaceConfig();
+            sc.setDepth(16, 24);
+            mRS = createRenderScriptGL(sc);
+            mRender = new ShadersTestRS();
+            mRender.init(mRS, getResources());
+        }
+    }
+
+    @Override
+    protected void onAttachedToWindow() {
+        super.onAttachedToWindow();
+        ensureRenderScript();
+    }
+
+    @Override
+    public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
+        super.surfaceChanged(holder, format, w, h);
+        mRender.surfaceChanged();
+    }
+
+    @Override
+    protected void onDetachedFromWindow() {
+        mRender = null;
+        if (mRS != null) {
+            mRS = null;
+            destroyRenderScriptGL();
+        }
+    }
+
+    @Override
+    public boolean onTouchEvent(MotionEvent ev) {
+        mScaleDetector.onTouchEvent(ev);
+
+        boolean ret = false;
+        float x = ev.getX();
+        float y = ev.getY();
+
+        final int action = ev.getAction();
+
+        switch (action & MotionEvent.ACTION_MASK) {
+        case MotionEvent.ACTION_DOWN: {
+            mRender.onActionDown(x, y);
+            mActivePointerId = ev.getPointerId(0);
+            ret = true;
+            break;
+        }
+        case MotionEvent.ACTION_MOVE: {
+            if (!mScaleDetector.isInProgress()) {
+                mRender.onActionMove(x, y);
+            }
+            mRender.onActionDown(x, y);
+            ret = true;
+            break;
+        }
+
+        case MotionEvent.ACTION_UP: {
+            mActivePointerId = INVALID_POINTER_ID;
+            break;
+        }
+
+        case MotionEvent.ACTION_CANCEL: {
+            mActivePointerId = INVALID_POINTER_ID;
+            break;
+        }
+
+        case MotionEvent.ACTION_POINTER_UP: {
+            final int pointerIndex = (ev.getAction() & MotionEvent.ACTION_POINTER_INDEX_MASK)
+                    >> MotionEvent.ACTION_POINTER_INDEX_SHIFT;
+            final int pointerId = ev.getPointerId(pointerIndex);
+            if (pointerId == mActivePointerId) {
+                // This was our active pointer going up. Choose a new
+                // active pointer and adjust accordingly.
+                final int newPointerIndex = pointerIndex == 0 ? 1 : 0;
+                x = ev.getX(newPointerIndex);
+                y = ev.getY(newPointerIndex);
+                mRender.onActionDown(x, y);
+                mActivePointerId = ev.getPointerId(newPointerIndex);
+            }
+            break;
+        }
+        }
+
+        return ret;
+    }
+
+    private class ScaleListener extends ScaleGestureDetector.SimpleOnScaleGestureListener {
+        @Override
+        public boolean onScale(ScaleGestureDetector detector) {
+            mRender.onActionScale(detector.getScaleFactor());
+            return true;
+        }
+    }
+}
+
+
diff --git a/tests/RenderScriptTests/ShadersTest/src/com/android/shaderstest/shaderstest.rs b/tests/RenderScriptTests/ShadersTest/src/com/android/shaderstest/shaderstest.rs
new file mode 100644
index 0000000..53f10f9
--- /dev/null
+++ b/tests/RenderScriptTests/ShadersTest/src/com/android/shaderstest/shaderstest.rs
@@ -0,0 +1,193 @@
+// Copyright (C) 2011 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma version(1)
+
+#pragma rs java_package_name(com.android.shaderstest)
+
+#include "rs_graphics.rsh"
+
+rs_program_vertex gPVBackground;
+rs_program_fragment gPFBackground;
+
+typedef struct VignetteConstants_s {
+    float size;
+    float feather;
+    float width;
+    float height;
+} VignetteConstants;
+VignetteConstants *gFSVignetteConstants;
+rs_program_fragment gPFVignette;
+
+rs_allocation gTMesh;
+
+rs_sampler gLinear;
+rs_sampler gNearest;
+
+rs_program_store gPFSBackground;
+
+rs_allocation gScreenDepth;
+rs_allocation gScreen;
+
+typedef struct MeshInfo {
+    rs_mesh mMesh;
+    int mNumIndexSets;
+    float3 bBoxMin;
+    float3 bBoxMax;
+} MeshInfo_t;
+MeshInfo_t *gMeshes;
+
+static float3 gLookAt;
+
+static float gRotateX;
+static float gRotateY;
+static float gZoom;
+
+static float gLastX;
+static float gLastY;
+
+void onActionDown(float x, float y) {
+    gLastX = x;
+    gLastY = y;
+}
+
+void onActionScale(float scale) {
+
+    gZoom *= 1.0f / scale;
+    gZoom = max(0.1f, min(gZoom, 500.0f));
+}
+
+void onActionMove(float x, float y) {
+    float dx = gLastX - x;
+    float dy = gLastY - y;
+
+    if (fabs(dy) <= 2.0f) {
+        dy = 0.0f;
+    }
+    if (fabs(dx) <= 2.0f) {
+        dx = 0.0f;
+    }
+
+    gRotateY -= dx;
+    if (gRotateY > 360) {
+        gRotateY -= 360;
+    }
+    if (gRotateY < 0) {
+        gRotateY += 360;
+    }
+
+    gRotateX -= dy;
+    gRotateX = min(gRotateX, 80.0f);
+    gRotateX = max(gRotateX, -80.0f);
+
+    gLastX = x;
+    gLastY = y;
+}
+
+void init() {
+    gRotateX = 0.0f;
+    gRotateY = 0.0f;
+    gZoom = 50.0f;
+    gLookAt = 0.0f;
+}
+
+void updateMeshInfo() {
+    rs_allocation allMeshes = rsGetAllocation(gMeshes);
+    int size = rsAllocationGetDimX(allMeshes);
+    gLookAt = 0.0f;
+    float minX, minY, minZ, maxX, maxY, maxZ;
+    for (int i = 0; i < size; i++) {
+        MeshInfo_t *info = (MeshInfo_t*)rsGetElementAt(allMeshes, i);
+        rsgMeshComputeBoundingBox(info->mMesh,
+                                  &minX, &minY, &minZ,
+                                  &maxX, &maxY, &maxZ);
+        info->bBoxMin = (minX, minY, minZ);
+        info->bBoxMax = (maxX, maxY, maxZ);
+        gLookAt += (info->bBoxMin + info->bBoxMax)*0.5f;
+    }
+    gLookAt = gLookAt / (float)size;
+}
+
+static void renderAllMeshes() {
+    rs_allocation allMeshes = rsGetAllocation(gMeshes);
+    int size = rsAllocationGetDimX(allMeshes);
+    gLookAt = 0.0f;
+    float minX, minY, minZ, maxX, maxY, maxZ;
+    for (int i = 0; i < size; i++) {
+        MeshInfo_t *info = (MeshInfo_t*)rsGetElementAt(allMeshes, i);
+        rsgDrawMesh(info->mMesh);
+    }
+}
+
+static void renderOffscreen() {
+    rsgBindProgramVertex(gPVBackground);
+    rs_matrix4x4 proj;
+    float aspect = (float) rsAllocationGetDimX(gScreen) / (float) rsAllocationGetDimY(gScreen);
+    rsMatrixLoadPerspective(&proj, 30.0f, aspect, 1.0f, 1000.0f);
+    rsgProgramVertexLoadProjectionMatrix(&proj);
+
+    rsgBindProgramFragment(gPFBackground);
+    rsgBindTexture(gPFBackground, 0, gTMesh);
+
+    rs_matrix4x4 matrix;
+
+    rsMatrixLoadIdentity(&matrix);
+    rsMatrixTranslate(&matrix, gLookAt.x, gLookAt.y, gLookAt.z - gZoom);
+    rsMatrixRotate(&matrix, gRotateX, 1.0f, 0.0f, 0.0f);
+    rsMatrixRotate(&matrix, gRotateY, 0.0f, 1.0f, 0.0f);
+    rsgProgramVertexLoadModelMatrix(&matrix);
+
+    renderAllMeshes();
+}
+
+static void drawOffscreenResult(int posX, int posY, float width, float height) {
+    // display the result d
+    rs_matrix4x4 proj, matrix;
+    rsMatrixLoadOrtho(&proj, 0, width, height, 0, -500, 500);
+    rsgProgramVertexLoadProjectionMatrix(&proj);
+    rsMatrixLoadIdentity(&matrix);
+    rsgProgramVertexLoadModelMatrix(&matrix);
+    float startX = posX, startY = posY;
+    rsgDrawQuadTexCoords(startX, startY, 0, 0, 1,
+                         startX, startY + height, 0, 0, 0,
+                         startX + width, startY + height, 0, 1, 0,
+                         startX + width, startY, 0, 1, 1);
+}
+
+int root(void) {
+    gFSVignetteConstants->size = 0.58f * 0.58f;
+    gFSVignetteConstants->feather = 0.2f;
+    gFSVignetteConstants->width = (float) rsAllocationGetDimX(gScreen);
+    gFSVignetteConstants->height = (float) rsAllocationGetDimY(gScreen);
+
+    rsgBindProgramStore(gPFSBackground);
+
+    // Render scene to fullscreenbuffer
+    rsgBindColorTarget(gScreen, 0);
+    rsgBindDepthTarget(gScreenDepth);
+    rsgClearDepth(1.0f);
+    rsgClearColor(1.0f, 1.0f, 1.0f, 0.0f);
+    renderOffscreen();
+
+    // Render on screen
+    rsgClearAllRenderTargets();
+    rsgClearColor(1.0f, 1.0f, 1.0f, 1.0f);
+    rsgClearDepth(1.0f);
+
+    rsgBindProgramFragment(gPFVignette);
+    rsgBindTexture(gPFVignette, 0, gScreen);
+    drawOffscreenResult(0, 0, rsgGetWidth(), rsgGetHeight());
+
+    return 0;
+}