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/*
* Copyright 2004-2005 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.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.fop.image.EPSImage;
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 {
/** logging instance */
protected static Log log = LogFactory.getLog(PSImageUtils.class);
/**
* Renders a bitmap 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 renderBitmapImage(FopImage img,
float x, float y, float w, float h, PSGenerator gen)
throws IOException {
if (img instanceof JpegImage) {
if (!img.load(FopImage.ORIGINAL_DATA)) {
gen.commentln("%JPEG image could not be processed: " + img);
return;
}
} else {
if (!img.load(FopImage.BITMAP)) {
gen.commentln("%Bitmap image could not be processed: " + img);
return;
}
}
boolean iscolor = img.getColorSpace().getType()
!= ColorSpace.CS_GRAY;
byte[] imgmap;
if (img.getBitmapsSize() > 0) {
imgmap = img.getBitmaps();
} else {
imgmap = img.getRessourceBytes();
}
gen.saveGraphicsState();
gen.writeln(x + " " + y + " translate");
gen.writeln(w + " " + h + " scale");
gen.commentln("%FOPBeginBitmap: " + img.getMimeType() + " " + img.getOriginalURI());
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("{{");
// 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");
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.commentln("%FOPEndBitmap");
gen.restoreGraphicsState();
}
public static void renderEPS(EPSImage img,
float x, float y, float w, float h,
PSGenerator gen) {
try {
if (!img.load(FopImage.ORIGINAL_DATA)) {
gen.commentln("%EPS image could not be processed: " + img);
return;
}
int[] bbox = img.getBBox();
int bboxw = bbox[2] - bbox[0];
int bboxh = bbox[3] - bbox[1];
String name = img.getDocName();
if (name == null || name.length() == 0) {
name = img.getOriginalURI();
}
renderEPS(img.getEPSImage(), name,
x, y, w, h,
bbox[0], bbox[1], bboxw, bboxh, gen);
} catch (Exception e) {
log.error("PSRenderer.renderImageArea(): Error rendering bitmap ("
+ e.getMessage() + ")", e);
}
}
/**
* Places an EPS file in the PostScript stream.
* @param rawEPS byte array containing the raw EPS data
* @param name name for the EPS document
* @param x x-coordinate of viewport in millipoints
* @param y y-coordinate of viewport in millipoints
* @param w width of viewport in millipoints
* @param h height of viewport in millipoints
* @param bboxx x-coordinate of EPS bounding box in points
* @param bboxy y-coordinate of EPS bounding box in points
* @param bboxw width of EPS bounding box in points
* @param bboxh height of EPS bounding box in points
* @param gen the PS generator
* @throws IOException in case an I/O error happens during output
*/
public static void renderEPS(byte[] rawEPS, String name,
float x, float y, float w, float h,
int bboxx, int bboxy, int bboxw, int bboxh,
PSGenerator gen) throws IOException {
gen.notifyResourceUsage(PSProcSets.EPS_PROCSET, false);
gen.writeln("%FOPBeginEPS: " + name);
gen.writeln("BeginEPSF");
gen.writeln(gen.formatDouble(x) + " " + gen.formatDouble(y) + " translate");
gen.writeln("0 " + gen.formatDouble(h) + " translate");
gen.writeln("1 -1 scale");
float sx = w / bboxw;
float sy = h / bboxh;
if (sx != 1 || sy != 1) {
gen.writeln(gen.formatDouble(sx) + " " + gen.formatDouble(sy) + " scale");
}
if (bboxx != 0 || bboxy != 0) {
gen.writeln(gen.formatDouble(-bboxx) + " " + gen.formatDouble(-bboxy) + " translate");
}
gen.writeln(gen.formatDouble(bboxy) + " " + gen.formatDouble(bboxy)
+ " " + gen.formatDouble(bboxw) + " " + gen.formatDouble(bboxh) + " re clip");
gen.writeln("newpath");
PSResource res = new PSResource(PSResource.TYPE_FILE, name);
gen.notifyResourceUsage(res, false);
gen.writeDSCComment(DSCConstants.BEGIN_DOCUMENT, res.getName());
gen.writeByteArr(rawEPS);
gen.writeDSCComment(DSCConstants.END_DOCUMENT);
gen.writeln("EndEPSF");
gen.writeln("%FOPEndEPS");
}
}
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