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/*
* Copyright 2004 The Apache Software Foundation.
*
* 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.
*/
/* $Id$ */
package org.apache.fop.render.ps;
import java.awt.color.ColorSpace;
import java.io.IOException;
import java.io.OutputStream;
import org.apache.fop.image.FopImage;
import org.apache.fop.image.JpegImage;
import org.apache.fop.util.ASCII85OutputStream;
import org.apache.fop.util.Finalizable;
import org.apache.fop.util.FlateEncodeOutputStream;
import org.apache.fop.util.RunLengthEncodeOutputStream;
/**
* Utility code for rendering images in PostScript.
*/
public class PSImageUtils {
/**
* Renders an image to PostScript.
* @param img image to render
* @param x x position
* @param y y position
* @param w width
* @param h height
* @param gen PS generator
* @throws IOException In case of an I/O problem while rendering the image
*/
public static void renderFopImage(FopImage img, int x, int y, int w, int h, PSGenerator gen) throws IOException {
boolean iscolor = img.getColorSpace().getType()
!= ColorSpace.CS_GRAY;
byte[] imgmap = img.getBitmaps();
gen.saveGraphicsState();
if (img.getColorSpace().getType() == ColorSpace.TYPE_CMYK) {
gen.writeln("/DeviceCMYK setcolorspace");
} else if (img.getColorSpace().getType() == ColorSpace.CS_GRAY) {
gen.writeln("/DeviceGray setcolorspace");
} else {
gen.writeln("/DeviceRGB setcolorspace");
}
gen.writeln(x + " " + y + " translate");
gen.writeln(w + " " + h + " scale");
gen.writeln("{{");
// Template: (RawData is used for the EOF signal only)
// gen.write("/RawData currentfile <first filter> filter def");
// gen.write("/Data RawData <second filter> <third filter> [...] def");
if (img instanceof JpegImage) {
gen.writeln("/RawData currentfile /ASCII85Decode filter def");
gen.writeln("/Data RawData << >> /DCTDecode filter def");
} else {
if (gen.getPSLevel() >= 3) {
gen.writeln("/RawData currentfile /ASCII85Decode filter def");
gen.writeln("/Data RawData /FlateDecode filter def");
} else {
gen.writeln("/RawData currentfile /ASCII85Decode filter def");
gen.writeln("/Data RawData /RunLengthDecode filter def");
}
}
gen.writeln("<<");
gen.writeln(" /ImageType 1");
gen.writeln(" /Width " + img.getWidth());
gen.writeln(" /Height " + img.getHeight());
gen.writeln(" /BitsPerComponent 8");
if (img.getColorSpace().getType() == ColorSpace.TYPE_CMYK) {
if (false /*TODO img.invertImage()*/) {
gen.writeln(" /Decode [1 0 1 0 1 0 1 0]");
} else {
gen.writeln(" /Decode [0 1 0 1 0 1 0 1]");
}
} else if (iscolor) {
gen.writeln(" /Decode [0 1 0 1 0 1]");
} else {
gen.writeln(" /Decode [0 1]");
}
// Setup scanning for left-to-right and top-to-bottom
gen.writeln(" /ImageMatrix [" + img.getWidth() + " 0 0 "
+ img.getHeight() + " 0 0]");
gen.writeln(" /DataSource Data");
gen.writeln(">>");
gen.writeln("image");
/* the following two lines could be enabled if something still goes wrong
* gen.write("Data closefile");
* gen.write("RawData flushfile");
*/
gen.writeln("} stopped {handleerror} if");
gen.writeln(" RawData flushfile");
gen.writeln("} exec");
/*
* for (int y=0; y<img.getHeight(); y++) {
* int indx = y * img.getWidth();
* if (iscolor) indx*= 3;
* for (int x=0; x<img.getWidth(); x++) {
* if (iscolor) {
* writeASCIIHex(imgmap[indx++] & 0xFF);
* writeASCIIHex(imgmap[indx++] & 0xFF);
* writeASCIIHex(imgmap[indx++] & 0xFF);
* } else {
* writeASCIIHex(imgmap[indx++] & 0xFF);
* }
* }
* }
*/
OutputStream out = gen.getOutputStream();
out = new ASCII85OutputStream(out);
if (img instanceof JpegImage) {
//nop
} else {
if (gen.getPSLevel() >= 3) {
out = new FlateEncodeOutputStream(out);
} else {
out = new RunLengthEncodeOutputStream(out);
}
}
out.write(imgmap);
if (out instanceof Finalizable) {
((Finalizable)out).finalizeStream();
} else {
out.flush();
}
gen.writeln("");
gen.restoreGraphicsState();
}
}
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