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/*
* 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 android.renderscript;
import android.content.Context;
import android.content.res.Resources;
import android.util.Log;
/**
* Intrinsic for applying a color matrix to allocations.
*
* This has the same effect as loading each element and
* converting it to a {@link Element#F32_4}, multiplying the
* result by the 4x4 color matrix as performed by
* rsMatrixMultiply() and writing it to the output after
* conversion back to {@link Element#U8_4}.
**/
public final class ScriptIntrinsicColorMatrix extends ScriptIntrinsic {
private final Matrix4f mMatrix = new Matrix4f();
private Allocation mInput;
private ScriptIntrinsicColorMatrix(int id, RenderScript rs) {
super(id, rs);
}
/**
* Create an intrinsic for applying a color matrix to an
* allocation.
*
* Supported elements types are {@link Element#U8_4}
*
* @param rs The Renderscript context
* @param e Element type for intputs and outputs
*
* @return ScriptIntrinsicColorMatrix
*/
public static ScriptIntrinsicColorMatrix create(RenderScript rs, Element e) {
if (e != Element.U8_4(rs)) {
throw new RSIllegalArgumentException("Unsuported element type.");
}
int id = rs.nScriptIntrinsicCreate(2, e.getID(rs));
return new ScriptIntrinsicColorMatrix(id, rs);
}
private void setMatrix() {
FieldPacker fp = new FieldPacker(16*4);
fp.addMatrix(mMatrix);
setVar(0, fp);
}
/**
* Set the color matrix which will be applied to each cell of
* the image.
*
* @param m The 4x4 matrix to set.
*/
public void setColorMatrix(Matrix4f m) {
mMatrix.load(m);
setMatrix();
}
/**
* Set the color matrix which will be applied to each cell of the image.
* This will set the alpha channel to be a copy.
*
* @param m The 3x3 matrix to set.
*/
public void setColorMatrix(Matrix3f m) {
mMatrix.load(m);
setMatrix();
}
/**
* Set a color matrix to convert from RGB to luminance. The alpha channel
* will be a copy.
*
*/
public void setGreyscale() {
mMatrix.loadIdentity();
mMatrix.set(0, 0, 0.299f);
mMatrix.set(1, 0, 0.587f);
mMatrix.set(2, 0, 0.114f);
mMatrix.set(0, 1, 0.299f);
mMatrix.set(1, 1, 0.587f);
mMatrix.set(2, 1, 0.114f);
mMatrix.set(0, 2, 0.299f);
mMatrix.set(1, 2, 0.587f);
mMatrix.set(2, 2, 0.114f);
setMatrix();
}
/**
* Set the matrix to convert from YUV to RGB with a direct copy of the 4th
* channel.
*
*/
public void setYUVtoRGB() {
mMatrix.loadIdentity();
mMatrix.set(0, 0, 1.f);
mMatrix.set(1, 0, 0.f);
mMatrix.set(2, 0, 1.13983f);
mMatrix.set(0, 1, 1.f);
mMatrix.set(1, 1, -0.39465f);
mMatrix.set(2, 1, -0.5806f);
mMatrix.set(0, 2, 1.f);
mMatrix.set(1, 2, 2.03211f);
mMatrix.set(2, 2, 0.f);
setMatrix();
}
/**
* Set the matrix to convert from RGB to YUV with a direct copy of the 4th
* channel.
*
*/
public void setRGBtoYUV() {
mMatrix.loadIdentity();
mMatrix.set(0, 0, 0.299f);
mMatrix.set(1, 0, 0.587f);
mMatrix.set(2, 0, 0.114f);
mMatrix.set(0, 1, -0.14713f);
mMatrix.set(1, 1, -0.28886f);
mMatrix.set(2, 1, 0.436f);
mMatrix.set(0, 2, 0.615f);
mMatrix.set(1, 2, -0.51499f);
mMatrix.set(2, 2, -0.10001f);
setMatrix();
}
/**
* Invoke the kernel and apply the matrix to each cell of ain and copy to
* aout.
*
* @param ain Input allocation
* @param aout Output allocation
*/
public void forEach(Allocation ain, Allocation aout) {
forEach(0, ain, aout, null);
}
}
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