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/*
* 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.pdf;
import java.io.IOException;
import java.io.OutputStream;
/**
* Interface for a PDF image.
* This is used for inserting an image into PDF.
*/
public interface PDFImage {
/**
* Key to look up XObject.
* This should be a unique key to refer to the image.
*
* @return the key for this image
*/
String getKey();
/**
* Setup the PDF image for the current document.
* Some image formats may need to access the document (for example to
* add an ICC profile to the document).
*
* @param doc the PDF parent document
* (todo) Remove this and delegate to the XObject
*/
void setup(PDFDocument doc);
/**
* Get the image width in pixels.
*
* @return the image width
*/
int getWidth();
/**
* Get the image height in pixels.
*
* @return the image height
*/
int getHeight();
/**
* Get the color space for this image.
* Possible results are: DeviceGray, DeviceRGB, or DeviceCMYK
*
* @return the color space
*/
PDFDeviceColorSpace getColorSpace();
/**
* Get the bits per color component for this image.
*
* @return the bits per component
*/
int getBitsPerComponent();
/**
* Check if this image is a PostScript image.
*
* @return true if this is a PostScript image
*/
boolean isPS();
/**
* Check if this image has a transparent color transparency.
*
* @return true if it has transparency
*/
boolean isTransparent();
/**
* Get the transparent color.
*
* @return the transparent color for this image
*/
PDFColor getTransparentColor();
/**
* Get the PDF reference for a bitmap mask.
*
* @return the PDF reference for the mask image
*/
String getMask();
/**
* Get the PDF reference for a soft mask.
* @return the PDF reference for a soft mask image (or null if there's no soft mask)
*/
PDFReference getSoftMaskReference();
/** @return true for CMYK images generated by Adobe Photoshop */
boolean isInverted();
/**
* Get the PDF Filter to be applied to the image.
*
* @return the PDF Filter or null
*/
PDFFilter getPDFFilter();
// get the image bytes, and bytes properties
/**
* Writes the raw, unencoded contents of the image to a given output stream.
*
* @param out OutputStream to write to
* @throws IOException if there creating stream
*/
void outputContents(OutputStream out) throws IOException;
/**
* Populates the XObject's dictionary with additional values. The values are added to the
* dictionary after all the values obtained from other methods from this interface have
* been put into the dictionary. That allows to override certain values.
* @param dict the dictionary to fill
*/
void populateXObjectDictionary(PDFDictionary dict);
/**
* Get the ICC stream for this image.
*
* @return the ICC stream for this image if any
*/
PDFICCStream getICCStream();
/**
* Returns a hint in form of a String (Possible values from PDFFilterList)
* indicating which filter setup should be used to encode the object.
* @return the filter setup hint
*/
String getFilterHint();
}
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