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An Open Source JavaFX PDF Viewer
/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/support/
*
* (C) Copyright 1997-2016 IDRsolutions and Contributors.
*
* This file is part of JPedal/JPDF2HTML5
*
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* ---------------
* ConvertImageToShape.java
* ---------------
*/
package org.jpedal.parser.image.utils;
import java.awt.geom.GeneralPath;
import org.jpedal.objects.GraphicsState;
import org.jpedal.objects.SwingShape;
import org.jpedal.parser.Cmd;
import org.jpedal.parser.ParserOptions;
import org.jpedal.render.DynamicVectorRenderer;
public class ConvertImageToShape {
public static void convert(final byte[] data, int h, final GraphicsState gs, final DynamicVectorRenderer current, final ParserOptions parserOptions) {
/* Takes ac count of ef1603e.pdf. A thin horizontal dotted line is not scaled properly, therefore its converted to a shape.
* Condition is only executed if line is uniform along vertical axis
**/
final float ix = gs.CTM[2][0];
final float iy = gs.CTM[2][1];
float ih = gs.CTM[1][1];
float iw = gs.CTM[0][0];
//factor in GS rotation and swap w and h
if (gs.CTM[0][0] == 0 && gs.CTM[0][1] > 0 && gs.CTM[1][0] != 0 && gs.CTM[1][1] == 0) {
final float tmp = ih;
ih = iw;
iw = tmp;
}
final double byteWidth = iw / (data.length / h);
final double bitWidth = byteWidth / 8;
GeneralPath currentShape;
for (int col = 0; col < data.length; col++) {
int currentByte = (int) data[col] & 0xff;
currentByte = ~currentByte & 0xff;
int bitCount = 8;
double endX = 0, startX;
boolean draw = false;
while (currentByte != 0 || draw) {
bitCount--;
if ((currentByte & 0x1) == 1) {
if (!draw) {
endX = ((bitCount + 0.5) * bitWidth) + (col * byteWidth);
draw = true;
}
} else if (draw) {
draw = false;
startX = ((bitCount + 0.5) * bitWidth) + (col * byteWidth);
currentShape = new GeneralPath(GeneralPath.WIND_NON_ZERO);
currentShape.moveTo((float) (ix + startX), iy);
currentShape.lineTo((float) (ix + startX), iy + ih);
currentShape.lineTo((float) (ix + endX), iy + ih);
currentShape.lineTo((float) (ix + endX), iy);
currentShape.closePath();
//save for later
if (parserOptions.isRenderPage() && currentShape != null) {
gs.setNonstrokeColor(gs.nonstrokeColorSpace.getColor());
gs.setFillType(GraphicsState.FILL);
current.drawShape(new SwingShape(currentShape), gs, Cmd.F);
}
}
currentByte >>>= 1;
}
}
}
}