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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.render.pcl;
-
- import java.awt.Color;
- import java.awt.Dimension;
- import java.awt.Graphics2D;
- import java.awt.color.ColorSpace;
- import java.awt.geom.AffineTransform;
- import java.awt.image.BufferedImage;
- import java.awt.image.BufferedImageOp;
- import java.awt.image.ByteLookupTable;
- import java.awt.image.ColorConvertOp;
- import java.awt.image.ColorModel;
- import java.awt.image.DataBuffer;
- import java.awt.image.IndexColorModel;
- import java.awt.image.LookupOp;
- import java.awt.image.Raster;
- import java.awt.image.RenderedImage;
- import java.awt.image.WritableRaster;
- import java.io.DataOutputStream;
- import java.io.IOException;
- import java.io.OutputStream;
- import java.text.DecimalFormat;
- import java.text.DecimalFormatSymbols;
- import java.util.Locale;
-
- import org.apache.commons.io.output.ByteArrayOutputStream;
-
- import org.apache.xmlgraphics.image.GraphicsUtil;
- import org.apache.xmlgraphics.util.UnitConv;
-
- /**
- * This class provides methods for generating PCL print files.
- */
- public class PCLGenerator {
-
- private static final String US_ASCII = "US-ASCII";
-
- private static final String ISO_8859_1 = "ISO-8859-1";
-
- /** The ESC (escape) character */
- public static final char ESC = '\033';
-
- /** A list of all supported resolutions in PCL (values in dpi) */
- public static final int[] PCL_RESOLUTIONS = new int[] {75, 100, 150, 200, 300, 600};
-
- /** Selects a 4x4 Bayer dither matrix (17 grayscales) */
- public static final int DITHER_MATRIX_4X4 = 4;
- /** Selects a 8x8 Bayer dither matrix (65 grayscales) */
- public static final int DITHER_MATRIX_8X8 = 8;
-
- private final DecimalFormatSymbols symbols = new DecimalFormatSymbols(Locale.US);
- private final DecimalFormat df2 = new DecimalFormat("0.##", symbols);
- private final DecimalFormat df4 = new DecimalFormat("0.####", symbols);
-
- private final OutputStream out;
-
- private boolean currentSourceTransparency = true;
- private boolean currentPatternTransparency = true;
-
- private int maxBitmapResolution = PCL_RESOLUTIONS[PCL_RESOLUTIONS.length - 1];
-
- /**
- * true: Standard PCL shades are used (poor quality). false: user-defined pattern are used
- * to create custom dither patterns for better grayscale quality.
- */
- private final boolean usePCLShades = false;
-
- /**
- * Main constructor.
- * @param out the OutputStream to write the PCL stream to
- */
- public PCLGenerator(OutputStream out) {
- this.out = out;
- }
-
- /**
- * Main constructor.
- * @param out the OutputStream to write the PCL stream to
- * @param maxResolution the maximum resolution to encode bitmap images at
- */
- public PCLGenerator(OutputStream out, int maxResolution) {
- this(out);
- boolean found = false;
- for (int i = 0; i < PCL_RESOLUTIONS.length; i++) {
- if (PCL_RESOLUTIONS[i] == maxResolution) {
- found = true;
- break;
- }
- }
- if (!found) {
- throw new IllegalArgumentException("Illegal value for maximum resolution!");
- }
- this.maxBitmapResolution = maxResolution;
- }
-
- /** @return the OutputStream that this generator writes to */
- public OutputStream getOutputStream() {
- return this.out;
- }
-
- /**
- * Returns the currently active text encoding.
- * @return the text encoding
- */
- public String getTextEncoding() {
- return ISO_8859_1;
- }
-
- /** @return the maximum resolution to encode bitmap images at */
- public int getMaximumBitmapResolution() {
- return this.maxBitmapResolution;
- }
-
- /**
- * Writes a PCL escape command to the output stream.
- * @param cmd the command (without the ESCAPE character)
- * @throws IOException In case of an I/O error
- */
- public void writeCommand(String cmd) throws IOException {
- out.write(27); //ESC
- out.write(cmd.getBytes(US_ASCII));
- }
-
- /**
- * Writes raw text (in ISO-8859-1 encoding) to the output stream.
- * @param s the text
- * @throws IOException In case of an I/O error
- */
- public void writeText(String s) throws IOException {
- out.write(s.getBytes(ISO_8859_1));
- }
-
- /**
- * Formats a double value with two decimal positions for PCL output.
- *
- * @param value value to format
- * @return the formatted value
- */
- public final String formatDouble2(double value) {
- return df2.format(value);
- }
-
- /**
- * Formats a double value with four decimal positions for PCL output.
- *
- * @param value value to format
- * @return the formatted value
- */
- public final String formatDouble4(double value) {
- return df4.format(value);
- }
-
- /**
- * Sends the universal end of language command (UEL).
- * @throws IOException In case of an I/O error
- */
- public void universalEndOfLanguage() throws IOException {
- writeCommand("%-12345X");
- }
-
- /**
- * Resets the printer and restores the user default environment.
- * @throws IOException In case of an I/O error
- */
- public void resetPrinter() throws IOException {
- writeCommand("E");
- }
-
- /**
- * Sends the job separation command.
- * @throws IOException In case of an I/O error
- */
- public void separateJobs() throws IOException {
- writeCommand("&l1T");
- }
-
- /**
- * Sends the form feed character.
- * @throws IOException In case of an I/O error
- */
- public void formFeed() throws IOException {
- out.write(12); //=OC ("FF", Form feed)
- }
-
- /**
- * Sets the unit of measure.
- * @param value the resolution value (units per inch)
- * @throws IOException In case of an I/O error
- */
- public void setUnitOfMeasure(int value) throws IOException {
- writeCommand("&u" + value + "D");
- }
-
- /**
- * Sets the raster graphics resolution
- * @param value the resolution value (units per inch)
- * @throws IOException In case of an I/O error
- */
- public void setRasterGraphicsResolution(int value) throws IOException {
- writeCommand("*t" + value + "R");
- }
-
- /**
- * Selects the page size.
- * @param selector the integer representing the page size
- * @throws IOException In case of an I/O error
- */
- public void selectPageSize(int selector) throws IOException {
- writeCommand("&l" + selector + "A");
- }
-
- /**
- * Selects the paper source. The parameter is usually printer-specific. Usually, "1" is the
- * default tray, "2" is the manual paper feed, "3" is the manual envelope feed, "4" is the
- * "lower" tray and "7" is "auto-select". Consult the technical reference for your printer
- * for all available values.
- * @param selector the integer representing the paper source/tray
- * @throws IOException In case of an I/O error
- */
- public void selectPaperSource(int selector) throws IOException {
- writeCommand("&l" + selector + "H");
- }
-
- /**
- * Selects the duplexing mode for the page.
- * The parameter is usually printer-specific.
- * "0" means Simplex,
- * "1" means Duplex, Long-Edge Binding,
- * "2" means Duplex, Short-Edge Binding.
- * @param selector the integer representing the duplexing mode of the page
- * @throws IOException In case of an I/O error
- */
- public void selectDuplexMode(int selector) throws IOException {
- writeCommand("&l" + selector + "S");
- }
-
- /**
- * Clears the horizontal margins.
- * @throws IOException In case of an I/O error
- */
- public void clearHorizontalMargins() throws IOException {
- writeCommand("9");
- }
-
- /**
- * The Top Margin command designates the number of lines between
- * the top of the logical page and the top of the text area.
- * @param numberOfLines the number of lines (See PCL specification for details)
- * @throws IOException In case of an I/O error
- */
- public void setTopMargin(int numberOfLines) throws IOException {
- writeCommand("&l" + numberOfLines + "E");
- }
-
- /**
- * The Text Length command can be used to define the bottom border. See the PCL specification
- * for details.
- * @param numberOfLines the number of lines
- * @throws IOException In case of an I/O error
- */
- public void setTextLength(int numberOfLines) throws IOException {
- writeCommand("&l" + numberOfLines + "F");
- }
-
- /**
- * Sets the Vertical Motion Index (VMI).
- * @param value the VMI value
- * @throws IOException In case of an I/O error
- */
- public void setVMI(double value) throws IOException {
- writeCommand("&l" + formatDouble4(value) + "C");
- }
-
- /**
- * Sets the cursor to a new absolute coordinate.
- * @param x the X coordinate (in millipoints)
- * @param y the Y coordinate (in millipoints)
- * @throws IOException In case of an I/O error
- */
- public void setCursorPos(double x, double y) throws IOException {
- if (x < 0) {
- //A negative x value will result in a relative movement so go to "0" first.
- //But this will most probably have no effect anyway since you can't paint to the left
- //of the logical page
- writeCommand("&a0h" + formatDouble2(x / 100) + "h" + formatDouble2(y / 100) + "V");
- } else {
- writeCommand("&a" + formatDouble2(x / 100) + "h" + formatDouble2(y / 100) + "V");
- }
- }
-
- /**
- * Pushes the current cursor position on a stack (stack size: max 20 entries)
- * @throws IOException In case of an I/O error
- */
- public void pushCursorPos() throws IOException {
- writeCommand("&f0S");
- }
-
- /**
- * Pops the current cursor position from the stack.
- * @throws IOException In case of an I/O error
- */
- public void popCursorPos() throws IOException {
- writeCommand("&f1S");
- }
-
- /**
- * Changes the current print direction while maintaining the current cursor position.
- * @param rotate the rotation angle (counterclockwise), one of 0, 90, 180 and 270.
- * @throws IOException In case of an I/O error
- */
- public void changePrintDirection(int rotate) throws IOException {
- writeCommand("&a" + rotate + "P");
- }
-
- /**
- * Enters the HP GL/2 mode.
- * @param restorePreviousHPGL2Cursor true if the previous HP GL/2 pen position should be
- * restored, false if the current position is maintained
- * @throws IOException In case of an I/O error
- */
- public void enterHPGL2Mode(boolean restorePreviousHPGL2Cursor) throws IOException {
- if (restorePreviousHPGL2Cursor) {
- writeCommand("%0B");
- } else {
- writeCommand("%1B");
- }
- }
-
- /**
- * Enters the PCL mode.
- * @param restorePreviousPCLCursor true if the previous PCL cursor position should be restored,
- * false if the current position is maintained
- * @throws IOException In case of an I/O error
- */
- public void enterPCLMode(boolean restorePreviousPCLCursor) throws IOException {
- if (restorePreviousPCLCursor) {
- writeCommand("%0A");
- } else {
- writeCommand("%1A");
- }
- }
-
- /**
- * Generate a filled rectangle at the current cursor position.
- *
- * @param w the width in millipoints
- * @param h the height in millipoints
- * @param col the fill color
- * @throws IOException In case of an I/O error
- */
- protected void fillRect(int w, int h, Color col) throws IOException {
- if ((w == 0) || (h == 0)) {
- return;
- }
- if (h < 0) {
- h *= -1;
- } else {
- //y += h;
- }
- setPatternTransparencyMode(false);
- if (usePCLShades
- || Color.black.equals(col)
- || Color.white.equals(col)) {
- writeCommand("*c" + formatDouble4(w / 100.0) + "h"
- + formatDouble4(h / 100.0) + "V");
- int lineshade = convertToPCLShade(col);
- writeCommand("*c" + lineshade + "G");
- writeCommand("*c2P"); //Shaded fill
- } else {
- defineGrayscalePattern(col, 32, DITHER_MATRIX_4X4);
-
- writeCommand("*c" + formatDouble4(w / 100.0) + "h"
- + formatDouble4(h / 100.0) + "V");
- writeCommand("*c32G");
- writeCommand("*c4P"); //User-defined pattern
- }
- // Reset pattern transparency mode.
- setPatternTransparencyMode(true);
- }
-
- //Bayer dither matrices (4x4 and 8x8 are derived from the 2x2 matrix)
- private static final int[] BAYER_D2 = new int[] {0, 2, 3, 1};
- private static final int[] BAYER_D4;
- private static final int[] BAYER_D8;
-
- static {
- BAYER_D4 = deriveBayerMatrix(BAYER_D2);
- BAYER_D8 = deriveBayerMatrix(BAYER_D4);
- }
-
- private static void setValueInMatrix(int[] dn, int half, int part, int idx, int value) {
- int xoff = (part & 1) * half;
- int yoff = (part & 2) * half * half;
- int matrixIndex = yoff + ((idx / half) * half * 2) + (idx % half) + xoff;
- dn[matrixIndex] = value;
- }
-
- private static int[] deriveBayerMatrix(int[] d) {
- int[] dn = new int[d.length * 4];
- int half = (int)Math.sqrt(d.length);
- for (int part = 0; part < 4; part++) {
- for (int i = 0, c = d.length; i < c; i++) {
- setValueInMatrix(dn, half, part, i, d[i] * 4 + BAYER_D2[part]);
- }
- }
- return dn;
- }
-
- /**
- * Generates a user-defined pattern for a dithering pattern matching the grayscale value
- * of the color given.
- * @param col the color to create the pattern for
- * @param patternID the pattern ID to use
- * @param ditherMatrixSize the size of the Bayer dither matrix to use (4 or 8 supported)
- * @throws IOException In case of an I/O error
- */
- public void defineGrayscalePattern(Color col, int patternID, int ditherMatrixSize)
- throws IOException {
- ByteArrayOutputStream baout = new ByteArrayOutputStream();
- DataOutputStream data = new DataOutputStream(baout);
- data.writeByte(0); //Format
- data.writeByte(0); //Continuation
- data.writeByte(1); //Pixel Encoding
- data.writeByte(0); //Reserved
- data.writeShort(8); //Width in Pixels
- data.writeShort(8); //Height in Pixels
- //data.writeShort(600); //X Resolution (didn't manage to get that to work)
- //data.writeShort(600); //Y Resolution
- int gray255 = convertToGray(col.getRed(), col.getGreen(), col.getBlue());
-
- byte[] pattern;
- if (ditherMatrixSize == 8) {
- int gray65 = gray255 * 65 / 255;
-
- pattern = new byte[BAYER_D8.length / 8];
-
- for (int i = 0, c = BAYER_D8.length; i < c; i++) {
- boolean dot = !(BAYER_D8[i] < gray65 - 1);
- if (dot) {
- int byteIdx = i / 8;
- pattern[byteIdx] |= 1 << (i % 8);
- }
- }
- } else {
- int gray17 = gray255 * 17 / 255;
-
- //Since a 4x4 pattern did not work, the 4x4 pattern is applied 4 times to an
- //8x8 pattern. Maybe this could be changed to use an 8x8 bayer dither pattern
- //instead of the 4x4 one.
- pattern = new byte[BAYER_D4.length / 8 * 4];
-
- for (int i = 0, c = BAYER_D4.length; i < c; i++) {
- boolean dot = !(BAYER_D4[i] < gray17 - 1);
- if (dot) {
- int byteIdx = i / 4;
- pattern[byteIdx] |= 1 << (i % 4);
- pattern[byteIdx] |= 1 << ((i % 4) + 4);
- pattern[byteIdx + 4] |= 1 << (i % 4);
- pattern[byteIdx + 4] |= 1 << ((i % 4) + 4);
- }
- }
- }
- data.write(pattern);
- if ((baout.size() % 2) > 0) {
- baout.write(0);
- }
- writeCommand("*c" + patternID + "G");
- writeCommand("*c" + baout.size() + "W");
- baout.writeTo(this.out);
- writeCommand("*c4Q"); //temporary pattern
- }
-
- /**
- * Sets the source transparency mode.
- * @param transparent true if transparent, false for opaque
- * @throws IOException In case of an I/O error
- */
- public void setSourceTransparencyMode(boolean transparent) throws IOException {
- setTransparencyMode(transparent, currentPatternTransparency);
- }
-
- /**
- * Sets the pattern transparency mode.
- * @param transparent true if transparent, false for opaque
- * @throws IOException In case of an I/O error
- */
- public void setPatternTransparencyMode(boolean transparent) throws IOException {
- setTransparencyMode(currentSourceTransparency, transparent);
- }
-
- /**
- * Sets the transparency modes.
- * @param source source transparency: true if transparent, false for opaque
- * @param pattern pattern transparency: true if transparent, false for opaque
- * @throws IOException In case of an I/O error
- */
- public void setTransparencyMode(boolean source, boolean pattern) throws IOException {
- if (source != currentSourceTransparency && pattern != currentPatternTransparency) {
- writeCommand("*v" + (source ? '0' : '1') + "n" + (pattern ? '0' : '1') + "O");
- } else if (source != currentSourceTransparency) {
- writeCommand("*v" + (source ? '0' : '1') + "N");
- } else if (pattern != currentPatternTransparency) {
- writeCommand("*v" + (pattern ? '0' : '1') + "O");
- }
- this.currentSourceTransparency = source;
- this.currentPatternTransparency = pattern;
- }
-
- /**
- * Convert an RGB color value to a grayscale from 0 to 100.
- * @param r the red component
- * @param g the green component
- * @param b the blue component
- * @return the gray value
- */
- public final int convertToGray(int r, int g, int b) {
- return (r * 30 + g * 59 + b * 11) / 100;
- }
-
- /**
- * Convert a Color value to a PCL shade value (0-100).
- * @param col the color
- * @return the PCL shade value (100=black)
- */
- public final int convertToPCLShade(Color col) {
- float gray = convertToGray(col.getRed(), col.getGreen(), col.getBlue()) / 255f;
- return (int)(100 - (gray * 100f));
- }
-
- /**
- * Selects the current grayscale color (the given color is converted to grayscales).
- * @param col the color
- * @throws IOException In case of an I/O error
- */
- public void selectGrayscale(Color col) throws IOException {
- if (Color.black.equals(col)) {
- selectCurrentPattern(0, 0); //black
- } else if (Color.white.equals(col)) {
- selectCurrentPattern(0, 1); //white
- } else {
- if (usePCLShades) {
- selectCurrentPattern(convertToPCLShade(col), 2);
- } else {
- defineGrayscalePattern(col, 32, DITHER_MATRIX_4X4);
- selectCurrentPattern(32, 4);
- }
- }
- }
-
- /**
- * Select the current pattern
- * @param patternID the pattern ID (<ESC>*c#G command)
- * @param pattern the pattern type (<ESC>*v#T command)
- * @throws IOException In case of an I/O error
- */
- public void selectCurrentPattern(int patternID, int pattern) throws IOException {
- if (pattern > 1) {
- writeCommand("*c" + patternID + "G");
- }
- writeCommand("*v" + pattern + "T");
- }
-
- /**
- * Indicates whether an image is a monochrome (b/w) image.
- * @param img the image
- * @return true if it's a monochrome image
- */
- public static boolean isMonochromeImage(RenderedImage img) {
- ColorModel cm = img.getColorModel();
- if (cm instanceof IndexColorModel) {
- IndexColorModel icm = (IndexColorModel)cm;
- return icm.getMapSize() == 2;
- } else {
- return false;
- }
- }
-
- /**
- * Indicates whether an image is a grayscale image.
- * @param img the image
- * @return true if it's a grayscale image
- */
- public static boolean isGrayscaleImage(RenderedImage img) {
- return (img.getColorModel().getColorSpace().getNumComponents() == 1);
- }
-
- private MonochromeBitmapConverter createMonochromeBitmapConverter() {
- MonochromeBitmapConverter converter = null;
- try {
- String clName = "org.apache.fop.render.pcl.JAIMonochromeBitmapConverter";
- Class clazz = Class.forName(clName);
- converter = (MonochromeBitmapConverter)clazz.newInstance();
- } catch (ClassNotFoundException cnfe) {
- // Class was not compiled so is not available. Simply ignore.
- } catch (LinkageError le) {
- // This can happen if fop was build with support for a
- // particular provider (e.g. a binary fop distribution)
- // but the required support files (i.e. JAI) are not
- // available in the current runtime environment.
- // Simply continue with the backup implementation.
- } catch (InstantiationException e) {
- // Problem instantiating the class, simply continue with the backup implementation
- } catch (IllegalAccessException e) {
- // Problem instantiating the class, simply continue with the backup implementation
- }
- if (converter == null) {
- converter = new DefaultMonochromeBitmapConverter();
- }
- return converter;
- }
-
- private int calculatePCLResolution(int resolution) {
- return calculatePCLResolution(resolution, false);
- }
-
- /**
- * Calculates the ideal PCL resolution for a given resolution.
- * @param resolution the input resolution
- * @param increased true if you want to go to a higher resolution, for example if you
- * convert grayscale or color images to monochrome images so dithering has
- * a chance to generate better quality.
- * @return the resulting PCL resolution (one of 75, 100, 150, 200, 300, 600)
- */
- private int calculatePCLResolution(int resolution, boolean increased) {
- int choice = -1;
- for (int i = PCL_RESOLUTIONS.length - 2; i >= 0; i--) {
- if (resolution > PCL_RESOLUTIONS[i]) {
- int idx = i + 1;
- if (idx < PCL_RESOLUTIONS.length - 2) {
- idx += increased ? 2 : 0;
- } else if (idx < PCL_RESOLUTIONS.length - 1) {
- idx += increased ? 1 : 0;
- }
- choice = idx;
- break;
- //return PCL_RESOLUTIONS[idx];
- }
- }
- if (choice < 0) {
- choice = (increased ? 2 : 0);
- }
- while (choice > 0 && PCL_RESOLUTIONS[choice] > getMaximumBitmapResolution()) {
- choice--;
- }
- return PCL_RESOLUTIONS[choice];
- }
-
- private boolean isValidPCLResolution(int resolution) {
- return resolution == calculatePCLResolution(resolution);
- }
-
- private Dimension getAdjustedDimension(Dimension orgDim, double orgResolution,
- int pclResolution) {
- if (orgResolution == pclResolution) {
- return orgDim;
- } else {
- Dimension result = new Dimension();
- result.width = (int)Math.round((double)orgDim.width * pclResolution / orgResolution);
- result.height = (int)Math.round((double)orgDim.height * pclResolution / orgResolution);
- return result;
- }
- }
-
- //Threshold table to convert an alpha channel (8-bit) into a clip mask (1-bit)
- private static final byte[] THRESHOLD_TABLE = new byte[256];
- static { // Initialize the arrays
- for (int i = 0; i < 256; i++) {
- THRESHOLD_TABLE[i] = (byte) ((i < 240) ? 255 : 0);
- }
- }
-
- private RenderedImage getMask(RenderedImage img, Dimension targetDim) {
- ColorModel cm = img.getColorModel();
- if (cm.hasAlpha()) {
- BufferedImage alpha = new BufferedImage(img.getWidth(), img.getHeight(),
- BufferedImage.TYPE_BYTE_GRAY);
- Raster raster = img.getData();
- GraphicsUtil.copyBand(raster, cm.getNumColorComponents(), alpha.getRaster(), 0);
-
- BufferedImageOp op1 = new LookupOp(new ByteLookupTable(0, THRESHOLD_TABLE), null);
- BufferedImage alphat = op1.filter(alpha, null);
-
- BufferedImage mask;
- if (true) {
- mask = new BufferedImage(targetDim.width, targetDim.height,
- BufferedImage.TYPE_BYTE_BINARY);
- } else {
- byte[] arr = {(byte)0, (byte)0xff};
- ColorModel colorModel = new IndexColorModel(1, 2, arr, arr, arr);
- WritableRaster wraster = Raster.createPackedRaster(DataBuffer.TYPE_BYTE,
- targetDim.width, targetDim.height, 1, 1, null);
- mask = new BufferedImage(colorModel, wraster, false, null);
- }
-
- Graphics2D g2d = mask.createGraphics();
- try {
- AffineTransform at = new AffineTransform();
- double sx = targetDim.getWidth() / img.getWidth();
- double sy = targetDim.getHeight() / img.getHeight();
- at.scale(sx, sy);
- g2d.drawRenderedImage(alphat, at);
- } finally {
- g2d.dispose();
- }
- /*
- try {
- BatchDiffer.saveAsPNG(alpha, new java.io.File("D:/out-alpha.png"));
- BatchDiffer.saveAsPNG(mask, new java.io.File("D:/out-mask.png"));
- } catch (IOException e) {
- e.printStackTrace();
- }*/
- return mask;
- } else {
- return null;
- }
- }
-
- /**
- * Paint a bitmap at the current cursor position. The bitmap is converted to a monochrome
- * (1-bit) bitmap image.
- * @param img the bitmap image
- * @param targetDim the target Dimention (in mpt)
- * @param sourceTransparency true if the background should not be erased
- * @throws IOException In case of an I/O error
- */
- public void paintBitmap(RenderedImage img, Dimension targetDim, boolean sourceTransparency)
- throws IOException {
- double targetResolution = img.getWidth() / UnitConv.mpt2in(targetDim.width);
- int resolution = (int)Math.round(targetResolution);
- int effResolution = calculatePCLResolution(resolution, true);
- Dimension orgDim = new Dimension(img.getWidth(), img.getHeight());
- Dimension effDim = getAdjustedDimension(orgDim, targetResolution, effResolution);
- boolean scaled = !orgDim.equals(effDim);
-
- boolean monochrome = isMonochromeImage(img);
- if (!monochrome) {
- //Transparency mask disabled. Doesn't work reliably
- final boolean transparencyDisabled = true;
- RenderedImage mask = (transparencyDisabled ? null : getMask(img, effDim));
- if (mask != null) {
- pushCursorPos();
- selectCurrentPattern(0, 1); //Solid white
- setTransparencyMode(true, true);
- paintMonochromeBitmap(mask, effResolution);
- popCursorPos();
- }
-
- BufferedImage src = null;
- if (img instanceof BufferedImage && !scaled) {
- if (!isGrayscaleImage(img) || img.getColorModel().hasAlpha()) {
- src = new BufferedImage(effDim.width, effDim.height,
- BufferedImage.TYPE_BYTE_GRAY);
- ColorConvertOp op = new ColorConvertOp(
- ColorSpace.getInstance(ColorSpace.CS_GRAY), null);
- op.filter((BufferedImage)img, src);
- } else {
- src = (BufferedImage)img;
- }
- }
- if (src == null) {
- src = new BufferedImage(effDim.width, effDim.height,
- BufferedImage.TYPE_BYTE_GRAY);
- Graphics2D g2d = src.createGraphics();
- try {
- AffineTransform at = new AffineTransform();
- double sx = effDim.getWidth() / orgDim.getWidth();
- double sy = effDim.getHeight() / orgDim.getHeight();
- at.scale(sx, sy);
- g2d.drawRenderedImage(img, at);
- } finally {
- g2d.dispose();
- }
- }
- MonochromeBitmapConverter converter = createMonochromeBitmapConverter();
- converter.setHint("quality", "false");
-
- BufferedImage buf = (BufferedImage)converter.convertToMonochrome(src);
-
- RenderedImage red = buf;
- selectCurrentPattern(0, 0); //Solid black
- setTransparencyMode(sourceTransparency || mask != null, true);
- paintMonochromeBitmap(red, effResolution);
- } else {
- //TODO untested!
- RenderedImage effImg = img;
- if (scaled) {
- BufferedImage buf = new BufferedImage(effDim.width, effDim.height,
- BufferedImage.TYPE_BYTE_BINARY);
- Graphics2D g2d = buf.createGraphics();
- try {
- AffineTransform at = new AffineTransform();
- double sx = effDim.getWidth() / orgDim.getWidth();
- double sy = effDim.getHeight() / orgDim.getHeight();
- at.scale(sx, sy);
- g2d.drawRenderedImage(img, at);
- } finally {
- g2d.dispose();
- }
- effImg = buf;
- }
- setSourceTransparencyMode(sourceTransparency);
- selectCurrentPattern(0, 0); //Solid black
- paintMonochromeBitmap(effImg, effResolution);
- }
- }
-
- /**
- * Paint a bitmap at the current cursor position. The bitmap must be a monochrome
- * (1-bit) bitmap image.
- * @param img the bitmap image (must be 1-bit b/w)
- * @param resolution the resolution of the image (must be a PCL resolution)
- * @throws IOException In case of an I/O error
- */
- public void paintMonochromeBitmap(RenderedImage img, int resolution) throws IOException {
- if (!isValidPCLResolution(resolution)) {
- throw new IllegalArgumentException("Invalid PCL resolution: " + resolution);
- }
- setRasterGraphicsResolution(resolution);
- writeCommand("*r0f" + img.getHeight() + "t" + img.getWidth() + "s1A");
- Raster raster = img.getData();
- boolean monochrome = isMonochromeImage(img);
- if (!monochrome) {
- throw new IllegalArgumentException("img must be a monochrome image");
- }
-
- int x = 0;
- int y = 0;
- int imgw = img.getWidth();
- int imgh = img.getHeight();
- int bytewidth = (imgw / 8);
- if ((imgw % 8) != 0) {
- bytewidth++;
- }
- byte ib;
- byte[] rle = new byte[bytewidth * 2]; //compressed (RLE)
- byte[] uncompressed = new byte[bytewidth]; //uncompressed
- int lastcount = -1;
- byte lastbyte = 0;
- int rlewidth = 0;
-
- // Transfer graphics data
- for (y = 0; y < imgh; y++) {
- ib = 0;
- for (x = 0; x < imgw; x++) {
- int sample = raster.getSample(x, y, 0);
- //Set image bit for black
- if ((sample == 0)) {
- ib |= (1 << (7 - (x % 8)));
- }
-
- //RLE encoding
- if ((x % 8) == 7 || ((x + 1) == imgw)) {
- if (rlewidth < bytewidth) {
- if (lastcount >= 0) {
- if (ib == lastbyte) {
- lastcount++;
- } else {
- rle[rlewidth++] = (byte)(lastcount & 0xFF);
- rle[rlewidth++] = lastbyte;
- lastbyte = ib;
- lastcount = 0;
- }
- } else {
- lastbyte = ib;
- lastcount = 0;
- }
- if (lastcount == 255 || ((x + 1) == imgw)) {
- rle[rlewidth++] = (byte)(lastcount & 0xFF);
- rle[rlewidth++] = lastbyte;
- lastbyte = 0;
- lastcount = -1;
- }
- }
- uncompressed[x / 8] = ib;
- ib = 0;
- }
- }
- if (rlewidth < bytewidth) {
- writeCommand("*b1m" + rlewidth + "W");
- this.out.write(rle, 0, rlewidth);
- } else {
- writeCommand("*b0m" + bytewidth + "W");
- this.out.write(uncompressed);
- }
- lastcount = -1;
- rlewidth = 0;
- }
-
- // End raster graphics
- writeCommand("*rB");
- }
-
- }
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