Add histogram intrinsic
Change-Id: I67bcaaef033d8770047923e8243e739010238539
diff --git a/graphics/java/android/renderscript/ScriptIntrinsicHistogram.java b/graphics/java/android/renderscript/ScriptIntrinsicHistogram.java
new file mode 100644
index 0000000..e7f87d4
--- /dev/null
+++ b/graphics/java/android/renderscript/ScriptIntrinsicHistogram.java
@@ -0,0 +1,143 @@
+/*
+ * Copyright (C) 2013 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 android.renderscript;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.util.Log;
+
+/**
+ * Intrinsic Histogram filter.
+ *
+ *
+ **/
+public final class ScriptIntrinsicHistogram extends ScriptIntrinsic {
+ private Allocation mOut;
+
+ private ScriptIntrinsicHistogram(int id, RenderScript rs) {
+ super(id, rs);
+ }
+
+ /**
+ * Create an intrinsic for calculating the histogram of an uchar
+ * or uchar4 image.
+ *
+ * Supported elements types are {@link Element#U8_4, @link
+ * Element#U8}
+ *
+ * @param rs The RenderScript context
+ * @param e Element type for inputs and outputs
+ *
+ * @return ScriptIntrinsicHistogram
+ */
+ public static ScriptIntrinsicHistogram create(RenderScript rs, Element e) {
+ if ((!e.isCompatible(Element.U8_4(rs))) && (!e.isCompatible(Element.U8(rs)))) {
+ throw new RSIllegalArgumentException("Unsuported element type.");
+ }
+ int id = rs.nScriptIntrinsicCreate(9, e.getID(rs));
+ ScriptIntrinsicHistogram sib = new ScriptIntrinsicHistogram(id, rs);
+ return sib;
+ }
+
+ public void forEach(Allocation ain) {
+ int vecSize = mOut.getType().getElement().getVectorSize();
+ if (ain.getType().getElement().getVectorSize() != vecSize) {
+ throw new RSIllegalArgumentException("Vector sizes must match.");
+ }
+ if (ain.getType().getElement().isCompatible(Element.U8(mRS)) &&
+ ain.getType().getElement().isCompatible(Element.U8_4(mRS))) {
+ throw new RSIllegalArgumentException("Output type must be U32 or I32.");
+ }
+
+ forEach(0, ain, null, null);
+ }
+
+ public void setDotCoefficients(float r, float g, float b, float a) {
+ if ((r < 0.f) || (g < 0.f) || (b < 0.f) || (a < 0.f)) {
+ throw new RSIllegalArgumentException("Coefficient may not be negative.");
+ }
+ if ((r + g + b + a) > 1.f) {
+ throw new RSIllegalArgumentException("Sum of coefficients must be 1.0 or less.");
+ }
+
+ FieldPacker fp = new FieldPacker(16);
+ fp.addF32(r);
+ fp.addF32(g);
+ fp.addF32(b);
+ fp.addF32(a);
+ setVar(0, fp);
+ }
+
+ /**
+ * Set the output of the histogram.
+ *
+ * @param ain The input allocation
+ */
+ public void setOutput(Allocation aout) {
+ mOut = aout;
+ if (mOut.getType().getElement() != Element.U32(mRS) &&
+ mOut.getType().getElement() != Element.U32_3(mRS) &&
+ mOut.getType().getElement() != Element.U32_4(mRS) &&
+ mOut.getType().getElement() != Element.I32(mRS) &&
+ mOut.getType().getElement() != Element.I32_3(mRS) &&
+ mOut.getType().getElement() != Element.I32_4(mRS)) {
+
+ throw new RSIllegalArgumentException("Output type must be U32 or I32.");
+ }
+ if ((mOut.getType().getX() != 256) ||
+ (mOut.getType().getY() != 0) ||
+ mOut.getType().hasMipmaps() ||
+ (mOut.getType().getYuv() != 0)) {
+
+ throw new RSIllegalArgumentException("Output must be 1D, 256 elements.");
+ }
+ setVar(1, aout);
+ }
+
+ public void forEach_dot(Allocation ain) {
+ if (mOut.getType().getElement().getVectorSize() != 1) {
+ throw new RSIllegalArgumentException("Output vector size must be one.");
+ }
+ if (ain.getType().getElement().isCompatible(Element.U8(mRS)) &&
+ ain.getType().getElement().isCompatible(Element.U8_4(mRS))) {
+ throw new RSIllegalArgumentException("Output type must be U32 or I32.");
+ }
+
+ forEach(1, ain, null, null);
+ }
+
+
+
+ /**
+ * Get a KernelID for this intrinsic kernel.
+ *
+ * @return Script.KernelID The KernelID object.
+ */
+ public Script.KernelID getKernelID_seperate() {
+ return createKernelID(0, 3, null, null);
+ }
+
+ /**
+ * Get a FieldID for the input field of this intrinsic.
+ *
+ * @return Script.FieldID The FieldID object.
+ */
+ public Script.FieldID getFieldID_Input() {
+ return createFieldID(1, null);
+ }
+}
+