Add film grain test.

Change-Id: Ic7c7d7f66fbcf9a9e7a031a4c34f9a1372f0a7b7

Author: Jason Sams

tests/RenderScriptTests/ImageProcessing/src/com/android/rs/image/Grain.java

@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2012 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.rs.image;
+
+import java.lang.Math;
+
+import android.renderscript.Allocation;
+import android.renderscript.Element;
+import android.renderscript.RenderScript;
+import android.renderscript.Script;
+import android.renderscript.ScriptC;
+import android.renderscript.Type;
+import android.util.Log;
+import android.widget.SeekBar;
+import android.widget.TextView;
+
+public class Grain extends TestBase {
+    private ScriptC_grain mScript;
+    private Allocation mNoise;
+    private Allocation mNoise2;
+
+
+    public boolean onBar1Setup(SeekBar b, TextView t) {
+        t.setText("Strength");
+        b.setProgress(50);
+        return true;
+    }
+
+    public void onBar1Changed(int progress) {
+        float s = progress / 100.0f;
+        mScript.set_gNoiseStrength(s);
+    }
+
+    public void createTest(android.content.res.Resources res) {
+        int width = mInPixelsAllocation.getType().getX();
+        int height = mInPixelsAllocation.getType().getY();
+
+        Type.Builder tb = new Type.Builder(mRS, Element.U8(mRS));
+        tb.setX(width);
+        tb.setY(height);
+        mNoise = Allocation.createTyped(mRS, tb.create());
+        mNoise2 = Allocation.createTyped(mRS, tb.create());
+
+        mScript = new ScriptC_grain(mRS, res, R.raw.grain);
+        mScript.set_gWidth(width);
+        mScript.set_gHeight(height);
+        mScript.set_gNoiseStrength(0.5f);
+        mScript.set_gBlendSource(mNoise);
+        mScript.set_gNoise(mNoise2);
+    }
+
+    public void runTest() {
+        mScript.forEach_genRand(mNoise);
+        mScript.forEach_blend9(mNoise2);
+        mScript.forEach_root(mInPixelsAllocation, mOutPixelsAllocation);
+    }
+
+}
+

tests/RenderScriptTests/ImageProcessing/src/com/android/rs/image/ImageProcessingActivity.java

@@ -140,6 +140,9 @@ void changeTest(int testID) {
         case 5:
             mTest = new Greyscale();
             break;
+        case 6:
+            mTest = new Grain();
+            break;
         }
 
         mTest.createBaseTest(this, mBitmapIn);
@@ -152,13 +155,14 @@ void changeTest(int testID) {
     }
 
     void setupTests() {
-        mTestNames = new String[6];
+        mTestNames = new String[7];
         mTestNames[0] = "Levels Vec3 Relaxed";
         mTestNames[1] = "Levels Vec4 Relaxed";
         mTestNames[2] = "Levels Vec3 Full";
         mTestNames[3] = "Levels Vec4 Full";
         mTestNames[4] = "Blur radius 25";
         mTestNames[5] = "Greyscale";
+        mTestNames[6] = "Grain";
         mTestSpinner.setAdapter(new ArrayAdapter<String>(
             this, R.layout.spinner_layout, mTestNames));
     }

tests/RenderScriptTests/ImageProcessing/src/com/android/rs/image/grain.rs

@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2012 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.rs.image)
+#pragma rs_fp_relaxed
+
+void genRand(uchar *out) {
+    *out = (uchar)rsRand(0xff);
+}
+
+/*
+ * Convolution matrix of distance 2 with fixed point of 'kShiftBits' bits
+ * shifted. Thus the sum of this matrix should be 'kShiftValue'. Entries of
+ * small values are not calculated to gain efficiency.
+ * The order ot pixels represented in this matrix is:
+ *  1  2  3
+ *  4  0  5
+ *  6  7  8
+ *  and the matrix should be: {230, 56, 114, 56, 114, 114, 56, 114, 56}.
+ *  However, since most of the valus are identical, we only use the first three
+ *  entries and the entries corresponding to the pixels is:
+ *  1  2  1
+ *  2  0  2
+ *  1  2  1
+ */
+
+int32_t gWidth;
+int32_t gHeight;
+
+rs_allocation gBlendSource;
+void blend9(uchar *out, uint32_t x, uint32_t y) {
+    uint32_t x1 = min(x+1, (uint32_t)gWidth);
+    uint32_t x2 = max(x-1, (uint32_t)0);
+    uint32_t y1 = min(y+1, (uint32_t)gHeight);
+    uint32_t y2 = max(y-1, (uint32_t)0);
+
+    uint p00 = 56 *  ((uchar *)rsGetElementAt(gBlendSource, x1, y1))[0];
+    uint p01 = 114 * ((uchar *)rsGetElementAt(gBlendSource, x, y1))[0];
+    uint p02 = 56 *  ((uchar *)rsGetElementAt(gBlendSource, x2, y1))[0];
+    uint p10 = 114 * ((uchar *)rsGetElementAt(gBlendSource, x1, y))[0];
+    uint p11 = 230 * ((uchar *)rsGetElementAt(gBlendSource, x, y))[0];
+    uint p12 = 114 * ((uchar *)rsGetElementAt(gBlendSource, x2, y))[0];
+    uint p20 = 56 *  ((uchar *)rsGetElementAt(gBlendSource, x1, y2))[0];
+    uint p21 = 114 * ((uchar *)rsGetElementAt(gBlendSource, x, y2))[0];
+    uint p22 = 56 *  ((uchar *)rsGetElementAt(gBlendSource, x2, y2))[0];
+
+    p00 += p01;
+    p02 += p10;
+    p11 += p12;
+    p20 += p21;
+
+    p22 += p00;
+    p02 += p11;
+
+    p20 += p22;
+    p20 += p02;
+
+    *out = (uchar)(p20 >> 10);
+}
+
+float gNoiseStrength;
+
+rs_allocation gNoise;
+void root(const uchar4 *in, uchar4 *out, uint32_t x, uint32_t y) {
+    float4 ip = convert_float4(*in);
+    float pnoise = (float) ((uchar *)rsGetElementAt(gNoise, x, y))[0];
+
+    float energy_level = ip.r + ip.g + ip.b;
+    float energy_mask = (28.f - sqrt(energy_level)) * 0.03571f;
+    pnoise = (pnoise - 128.f) * energy_mask;
+
+    ip += pnoise * gNoiseStrength;
+    ip = clamp(ip, 0.f, 255.f);
+
+    uchar4 p = convert_uchar4(ip);
+    p.a = 0xff;
+    *out = p;
+}