/*
* 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.
*/
package org.apache.pdfbox.pdmodel.graphics.image;
import org.apache.pdfbox.pdmodel.graphics.color.PDColorSpace;
import org.apache.pdfbox.pdmodel.graphics.color.PDDeviceCMYK;
import org.apache.pdfbox.pdmodel.graphics.color.PDDeviceGray;
import org.apache.pdfbox.pdmodel.graphics.color.PDDeviceRGB;
import java.awt.color.ColorSpace;
import java.awt.color.ICC_ColorSpace;
import java.awt.image.BufferedImage;
import java.awt.image.ColorConvertOp;
/**
* An image factory.
*
* @author John Hewson
* @author Brigitte Mathiak
*/
class ImageFactory
{
protected ImageFactory()
{
}
// returns a PDColorSpace for a given BufferedImage
protected static PDColorSpace getColorSpaceFromAWT(BufferedImage awtImage)
{
if (awtImage.getColorModel().getNumComponents() == 1)
{
// 256 color (gray) JPEG
return PDDeviceGray.INSTANCE;
}
else
{
return toPDColorSpace(awtImage.getColorModel().getColorSpace());
}
}
// returns a PDColorSpace for a given AWT ColorSpace
protected static PDColorSpace toPDColorSpace(ColorSpace awtColorSpace)
{
if (awtColorSpace instanceof ICC_ColorSpace && !awtColorSpace.isCS_sRGB())
{
throw new UnsupportedOperationException("ICC color spaces not implemented");
}
else
{
switch (awtColorSpace.getType())
{
case ColorSpace.TYPE_RGB: return PDDeviceRGB.INSTANCE;
case ColorSpace.TYPE_GRAY: return PDDeviceGray.INSTANCE;
case ColorSpace.TYPE_CMYK: return PDDeviceCMYK.INSTANCE;
default: throw new UnsupportedOperationException("color space not implemented: " +
awtColorSpace.getType());
}
}
}
// returns the color channels of an image
protected static BufferedImage getColorImage(BufferedImage image)
{
if (!image.getColorModel().hasAlpha())
{
return image;
}
if (image.getColorModel().getColorSpace().getType() != ColorSpace.TYPE_RGB)
{
throw new UnsupportedOperationException("only RGB color spaces are implemented");
}
// create an RGB image without alpha
//BEWARE: the previous solution in the history
// g.setComposite(AlphaComposite.Src) and g.drawImage()
// didn't work properly for TYPE_4BYTE_ABGR.
// alpha values of 0 result in a black dest pixel!!!
BufferedImage rgbImage = new BufferedImage(
image.getWidth(),
image.getHeight(),
BufferedImage.TYPE_3BYTE_BGR);
return new ColorConvertOp(null).filter(image, rgbImage);
}
}