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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.util.Iterator;
- import java.util.Map;
-
- /**
- * Class representing a /ExtGState object.
- */
- public class PDFGState extends PDFObject {
-
- /** Line width (LW) */
- public static final String GSTATE_LINE_WIDTH = "LW";
- /** Line cap (LC) */
- public static final String GSTATE_LINE_CAP = "LC";
- /** Line join (LJ) */
- public static final String GSTATE_LINE_JOIN = "LJ";
- /** Miter limit (ML) */
- public static final String GSTATE_MITER_LIMIT = "ML";
- /** Dash pattern (D) */
- public static final String GSTATE_DASH_PATTERN = "D";
- /** Rendering intent (RI) */
- public static final String GSTATE_RENDERING_INTENT = "RI";
- /** Overprint for stroke (OP) */
- public static final String GSTATE_OVERPRINT_STROKE = "OP";
- /** Overprint for fill (op) */
- public static final String GSTATE_OVERPRINT_FILL = "op";
- /** Overprint mode (OPM) */
- public static final String GSTATE_OVERPRINT_MODE = "OPM";
- /** Font (Font) */
- public static final String GSTATE_FONT = "Font";
- /** Black generation (BG) */
- public static final String GSTATE_BLACK_GENERATION = "BG";
- /** Black generation with default (BG2) */
- public static final String GSTATE_BLACK_GENERATION2 = "BG2";
- /** Undercolor removal function (UCR) */
- public static final String GSTATE_UNDERCOLOR_REMOVAL = "UCR";
- /** Undercolor removal function with default (UCR2) */
- public static final String GSTATE_UNDERCOLOR_REMOVAL2 = "UCR2";
- /** Transfer function (TR) */
- public static final String GSTATE_TRANSFER_FUNCTION = "TR";
- /** Transfer function with default (TR2) */
- public static final String GSTATE_TRANSFER_FUNCTION2 = "TR2";
- /** Halftone dictionary or stream (HT) */
- public static final String GSTATE_HALFTONE_DICT = "HT";
- /** Halftone phase (HTP, does not show up anymore in PDF 1.4)*/
- public static final String GSTATE_HALFTONE_PHASE = "HTP";
- /** Flatness (FL) */
- public static final String GSTATE_FLATNESS = "FL";
- /** Smoothness (SM) */
- public static final String GSTATE_SMOOTHNESS = "SM";
- /** Strike adjustment (SA) */
- public static final String GSTATE_STRIKE_ADJ = "SA";
- /** Blend mode (BM, PDF 1.4) */
- public static final String GSTATE_BLEND_MODE = "BM";
- /** Soft mask (SMask, PDF 1.4) */
- public static final String GSTATE_SOFT_MASK = "SMask";
- /** Stroking Alpha (CA, PDF 1.4) */
- public static final String GSTATE_ALPHA_STROKE = "CA";
- /** Nonstroking Alpha (ca, PDF 1.4) */
- public static final String GSTATE_ALPHA_NONSTROKE = "ca";
- /** Alpha Source Flag (AIS, PDF 1.4) */
- public static final String GSTATE_ALPHA_SOURCE_FLAG = "AIS";
- /** Text Knockout Flag (TK, PDF 1.4) */
- public static final String GSTATE_TEXT_KNOCKOUT = "TK";
-
-
- /** Default GState object */
- public static final PDFGState DEFAULT;
-
- static {
- DEFAULT = new PDFGState();
- Map vals = DEFAULT.values;
- /*vals.put(LW, new Float(1.0));
- vals.put(LC, new Integer(0));
- vals.put(LJ, new Integer(0));
- vals.put(ML, new Float(10.0));
- vals.put(D, "0 []");
- vals.put(RI, "RelativeColorimetric");
- vals.put(OP, Boolean.FALSE);
- vals.put(op, Boolean.FALSE);
- vals.put(OPM, new Integer(1));
- vals.put(Font, "");*/
-
- vals.put(GSTATE_ALPHA_STROKE, new Float(1.0));
- vals.put(GSTATE_ALPHA_NONSTROKE, new Float(1.0));
- }
-
- private Map values = new java.util.HashMap();
-
- /**
- * Returns the name of this object
- * @return the name
- */
- public String getName() {
- return "GS" + getObjectNumber();
- }
-
- /**
- * Sets the alpha value.
- * @param val alpha value (0.0 - 1.0)
- * @param fill True if alpha should be set for non-stroking operations,
- * False if for stroking operations
- */
- public void setAlpha(float val, boolean fill) {
- if (fill) {
- values.put(GSTATE_ALPHA_NONSTROKE, new Float(val));
- } else {
- values.put(GSTATE_ALPHA_STROKE, new Float(val));
- }
- }
-
- /**
- * Adds all values from another GState object to this one.
- * @param state source object to copy from
- */
- public void addValues(PDFGState state) {
- values.putAll(state.values);
- }
-
- /**
- * Adds all values from a Map to this object.
- * @param vals source object to copy from
- */
- public void addValues(Map vals) {
- values.putAll(vals);
- }
-
- /**
- * {@inheritDoc}
- */
- public String toPDFString() {
- StringBuffer sb = new StringBuffer(64);
- sb.append("<<\n/Type /ExtGState\n");
- appendVal(sb, GSTATE_ALPHA_NONSTROKE);
- appendVal(sb, GSTATE_ALPHA_STROKE);
- sb.append(">>");
- return sb.toString();
- }
-
- private void appendVal(StringBuffer sb, String name) {
- Object val = values.get(name);
- if (val != null) {
- sb.append("/" + name + " " + val + "\n");
- }
- }
-
- /*
- * example
- * 29 0 obj
- * <<
- * /Type /ExtGState
- * /ca 0.5
- * >>
- * endobj
- */
-
- /** {@inheritDoc} */
- protected boolean contentEquals(PDFObject obj) {
- if (obj == this) {
- return true;
- }
- if (!(obj instanceof PDFGState)) {
- return false;
- }
- Map vals1 = values;
- Map vals2 = ((PDFGState)obj).values;
- if (vals1.size() != vals2.size()) {
- return false;
- }
- for (Iterator iter = vals1.keySet().iterator(); iter.hasNext();) {
- Object str = iter.next();
- Object obj1 = vals1.get(str);
- if (!obj1.equals(vals2.get(str))) {
- return false;
- }
- }
- return true;
- }
- }
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