Move RenderScript from graphics/ to new fw/base subdirectory rs.

Change-Id: I30b6633578f063840e1bdbcc9ba513b727912a6d

rs/java/android/renderscript/ScriptIntrinsicHistogram.java

@@ -0,0 +1,182 @@
+/*
+ * 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;
+
+/**
+ * Intrinsic Histogram filter.
+ *
+ *
+ **/
+public final class ScriptIntrinsicHistogram extends ScriptIntrinsic {
+    private Allocation mOut;
+
+    private ScriptIntrinsicHistogram(long 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_3},
+     * {@link Element#U8_2}, {@link Element#U8}
+     *
+     * @param rs The RenderScript context
+     * @param e Element type for inputs
+     *
+     * @return ScriptIntrinsicHistogram
+     */
+    public static ScriptIntrinsicHistogram create(RenderScript rs, Element e) {
+        if ((!e.isCompatible(Element.U8_4(rs))) &&
+            (!e.isCompatible(Element.U8_3(rs))) &&
+            (!e.isCompatible(Element.U8_2(rs))) &&
+            (!e.isCompatible(Element.U8(rs)))) {
+            throw new RSIllegalArgumentException("Unsuported element type.");
+        }
+        long id = rs.nScriptIntrinsicCreate(9, e.getID(rs));
+        ScriptIntrinsicHistogram sib = new ScriptIntrinsicHistogram(id, rs);
+        return sib;
+    }
+
+    /**
+     * Process an input buffer and place the histogram into the
+     * output allocation. The output allocation may be a narrower
+     * vector size than the input. In this case the vector size of
+     * the output is used to determine how many of the input
+     * channels are used in the computation. This is useful if you
+     * have an RGBA input buffer but only want the histogram for
+     * RGB.
+     *
+     * 1D and 2D input allocations are supported.
+     *
+     * @param ain The input image
+     */
+    public void forEach(Allocation ain) {
+        if (ain.getType().getElement().getVectorSize() <
+            mOut.getType().getElement().getVectorSize()) {
+
+            throw new RSIllegalArgumentException(
+                "Input vector size must be >= output vector size.");
+        }
+        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);
+    }
+
+    /**
+     * Set the coefficients used for the RGBA to Luminocity
+     * calculation. The default is {0.299f, 0.587f, 0.114f, 0.f}.
+     *
+     * Coefficients must be >= 0 and sum to 1.0 or less.
+     *
+     * @param r Red coefficient
+     * @param g Green coefficient
+     * @param b Blue coefficient
+     * @param a Alpha coefficient
+     */
+    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.  32 bit integer types are
+     * supported.
+     *
+     * @param aout The output allocation
+     */
+    public void setOutput(Allocation aout) {
+        mOut = aout;
+        if (mOut.getType().getElement() != Element.U32(mRS) &&
+            mOut.getType().getElement() != Element.U32_2(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_2(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);
+    }
+
+    /**
+     * Process an input buffer and place the histogram into the
+     * output allocation. The dot product of the input channel and
+     * the coefficients from 'setDotCoefficients' are used to
+     * calculate the output values.
+     *
+     * 1D and 2D input allocations are supported.
+     *
+     * @param ain The input image
+     */
+    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_Separate() {
+        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);
+    }
+}
+