/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
/* $Id$ */
package org.apache.fop.render.ps;
import java.awt.image.ComponentColorModel;
import java.awt.image.IndexColorModel;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import org.junit.Test;
import org.apache.xmlgraphics.image.loader.ImageSize;
import org.apache.xmlgraphics.image.loader.impl.ImageRawPNG;
import org.apache.fop.render.RawPNGTestUtil;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
public class ImageEncoderPNGTestCase {
@Test
public void testWriteToWithRGBPNG() throws IOException {
testWriteToWithGRGBAPNG(-1, 128, 128, 128, -1);
}
@Test
public void testWriteToWithGPNG() throws IOException {
testWriteToWithGRGBAPNG(128, -1, -1, -1, -1);
}
@Test
public void testWriteToWithRGBAPNG() throws IOException {
testWriteToWithGRGBAPNG(-1, 128, 128, 128, 128);
}
@Test
public void testWriteToWithGAPNG() throws IOException {
testWriteToWithGRGBAPNG(128, -1, -1, -1, 128);
}
private void testWriteToWithGRGBAPNG(int gray, int red, int green, int blue, int alpha)
throws IOException {
int numComponents = (gray > -1 ? 1 : 3) + (alpha > -1 ? 1 : 0);
ImageSize is = RawPNGTestUtil.getImageSize();
ComponentColorModel cm = mock(ComponentColorModel.class);
when(cm.getNumComponents()).thenReturn(numComponents);
ImageRawPNG irpng = mock(ImageRawPNG.class);
when(irpng.getColorModel()).thenReturn(cm);
when(irpng.getSize()).thenReturn(is);
ImageEncoderPNG iepng = new ImageEncoderPNG(irpng);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] data = RawPNGTestUtil.buildGRGBAData(gray, red, green, blue, alpha);
ByteArrayInputStream bais = new ByteArrayInputStream(data);
when(irpng.createInputStream()).thenReturn(bais);
iepng.writeTo(baos);
if (alpha > -1) {
byte[] expected = RawPNGTestUtil.buildGRGBAData(gray, red, green, blue, -1);
assertArrayEquals(expected, baos.toByteArray());
} else {
assertArrayEquals(data, baos.toByteArray());
}
}
@Test
public void testWriteToWithPalettePNG() throws IOException {
ImageSize is = RawPNGTestUtil.getImageSize();
IndexColorModel cm = mock(IndexColorModel.class);
ImageRawPNG irpng = mock(ImageRawPNG.class);
when(irpng.getColorModel()).thenReturn(cm);
when(irpng.getSize()).thenReturn(is);
ImageEncoderPNG iepng = new ImageEncoderPNG(irpng);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] data = RawPNGTestUtil.buildGRGBAData(128, -1, -1, -1, -1);
ByteArrayInputStream bais = new ByteArrayInputStream(data);
when(irpng.createInputStream()).thenReturn(bais);
iepng.writeTo(baos);
assertArrayEquals(data, baos.toByteArray());
}
@Test
public void testGetImplicitFilterWithIndexColorModel() {
ImageSize is = RawPNGTestUtil.getImageSize();
IndexColorModel cm = mock(IndexColorModel.class);
ImageRawPNG irpng = mock(ImageRawPNG.class);
when(irpng.getColorModel()).thenReturn(cm);
when(irpng.getBitDepth()).thenReturn(8);
when(irpng.getSize()).thenReturn(is);
ImageEncoderPNG iepng = new ImageEncoderPNG(irpng);
String expectedFilter = "<< /Predictor 15 /Columns 32 /Colors 1 /BitsPerComponent 8 >> /FlateDecode";
assertEquals(expectedFilter, iepng.getImplicitFilter());
}
@Test
public void testGetImplicitFilterWithComponentColorModel() {
ImageSize is = RawPNGTestUtil.getImageSize();
ComponentColorModel cm = mock(ComponentColorModel.class);
when(cm.getNumComponents()).thenReturn(3);
ImageRawPNG irpng = mock(ImageRawPNG.class);
when(irpng.getColorModel()).thenReturn(cm);
when(irpng.getBitDepth()).thenReturn(8);
when(irpng.getSize()).thenReturn(is);
ImageEncoderPNG iepng = new ImageEncoderPNG(irpng);
String expectedFilter = "<< /Predictor 15 /Columns 32 /Colors 3 /BitsPerComponent 8 >> /FlateDecode";
assertEquals(expectedFilter, iepng.getImplicitFilter());
}
}