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/*
* Copyright (C) 2016 Linaro Limited. All rights received.
*
* 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 org.linaro.benchmarks;
import org.openjdk.jmh.annotations.*;
import java.util.concurrent.TimeUnit;
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.MICROSECONDS)
@State(Scope.Benchmark)
public class TestRGBToCmyk
{
static final int LENGTH = 256 * 1024;
static byte input[] = new byte[LENGTH*3];
static byte output[] = new byte[LENGTH*4];
public static void TestRGBToCmykInit()
{
for (int i = 0; i < LENGTH*3; i++) {
input[i] = (byte)i;
}
}
public static void RGBToCmyk(byte[] rgb, byte[] cmyk, int cnt)
{
int i;
int c, m, y, k;
for (i = 0; i < cnt; i++) {
/* calculate complementary colors */
c = 255 - rgb[i*3];
m = 255 - rgb[i*3+1];
y = 255 - rgb[i*3+2];
/* find the black level k */
k = Math.min(Math.min(c, m), y);
/* correct complementary color lever based on k */
cmyk[i*4] = (byte)(c - k);
cmyk[i*4+1] = (byte)(m - k);
cmyk[i*4+2] = (byte)(y - k);
cmyk[i*4+3] = (byte)(k);
}
}
@Setup
public void setup()
{
TestRGBToCmykInit();
}
@Benchmark
public void testRGBToCmyk() {
RGBToCmyk(input, output, LENGTH);
}
}
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