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/*
This file is part of the iText (R) project.
Copyright (c) 1998-2021 iText Group NV
Authors: Bruno Lowagie, Paulo Soares, et al.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License version 3
as published by the Free Software Foundation with the addition of the
following permission added to Section 15 as permitted in Section 7(a):
FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
OF THIRD PARTY RIGHTS
This program 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program; if not, see http://www.gnu.org/licenses or write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA, 02110-1301 USA, or download the license from the following URL:
http://itextpdf.com/terms-of-use/
The interactive user interfaces in modified source and object code versions
of this program must display Appropriate Legal Notices, as required under
Section 5 of the GNU Affero General Public License.
In accordance with Section 7(b) of the GNU Affero General Public License,
a covered work must retain the producer line in every PDF that is created
or manipulated using iText.
You can be released from the requirements of the license by purchasing
a commercial license. Buying such a license is mandatory as soon as you
develop commercial activities involving the iText software without
disclosing the source code of your own applications.
These activities include: offering paid services to customers as an ASP,
serving PDFs on the fly in a web application, shipping iText with a closed
source product.
For more information, please contact iText Software Corp. at this
address: [email protected]
*/
package com.itextpdf.kernel.pdf.canvas.wmf;
import com.itextpdf.io.font.FontProgram;
import com.itextpdf.io.font.PdfEncodings;
import com.itextpdf.io.image.ImageData;
import com.itextpdf.io.image.ImageDataFactory;
import com.itextpdf.io.image.ImageType;
import com.itextpdf.kernel.PdfException;
import com.itextpdf.kernel.colors.Color;
import com.itextpdf.kernel.font.PdfFontFactory;
import com.itextpdf.kernel.font.PdfFontFactory.EmbeddingStrategy;
import com.itextpdf.kernel.geom.Point;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.pdf.canvas.PdfCanvas;
import com.itextpdf.kernel.pdf.canvas.PdfCanvasConstants;
import com.itextpdf.kernel.pdf.xobject.PdfImageXObject;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.util.List;
/**
* A class to process WMF files. Used internally by {@link com.itextpdf.kernel.pdf.canvas.wmf.WmfImageHelper}.
*/
public class MetaDo {
public static final int META_SETBKCOLOR = 0x0201;
public static final int META_SETBKMODE = 0x0102;
public static final int META_SETMAPMODE = 0x0103;
public static final int META_SETROP2 = 0x0104;
public static final int META_SETRELABS = 0x0105;
public static final int META_SETPOLYFILLMODE = 0x0106;
public static final int META_SETSTRETCHBLTMODE = 0x0107;
public static final int META_SETTEXTCHAREXTRA = 0x0108;
public static final int META_SETTEXTCOLOR = 0x0209;
public static final int META_SETTEXTJUSTIFICATION = 0x020A;
public static final int META_SETWINDOWORG = 0x020B;
public static final int META_SETWINDOWEXT = 0x020C;
public static final int META_SETVIEWPORTORG = 0x020D;
public static final int META_SETVIEWPORTEXT = 0x020E;
public static final int META_OFFSETWINDOWORG = 0x020F;
public static final int META_SCALEWINDOWEXT = 0x0410;
public static final int META_OFFSETVIEWPORTORG = 0x0211;
public static final int META_SCALEVIEWPORTEXT = 0x0412;
public static final int META_LINETO = 0x0213;
public static final int META_MOVETO = 0x0214;
public static final int META_EXCLUDECLIPRECT = 0x0415;
public static final int META_INTERSECTCLIPRECT = 0x0416;
public static final int META_ARC = 0x0817;
public static final int META_ELLIPSE = 0x0418;
public static final int META_FLOODFILL = 0x0419;
public static final int META_PIE = 0x081A;
public static final int META_RECTANGLE = 0x041B;
public static final int META_ROUNDRECT = 0x061C;
public static final int META_PATBLT = 0x061D;
public static final int META_SAVEDC = 0x001E;
public static final int META_SETPIXEL = 0x041F;
public static final int META_OFFSETCLIPRGN = 0x0220;
public static final int META_TEXTOUT = 0x0521;
public static final int META_BITBLT = 0x0922;
public static final int META_STRETCHBLT = 0x0B23;
public static final int META_POLYGON = 0x0324;
public static final int META_POLYLINE = 0x0325;
public static final int META_ESCAPE = 0x0626;
public static final int META_RESTOREDC = 0x0127;
public static final int META_FILLREGION = 0x0228;
public static final int META_FRAMEREGION = 0x0429;
public static final int META_INVERTREGION = 0x012A;
public static final int META_PAINTREGION = 0x012B;
public static final int META_SELECTCLIPREGION = 0x012C;
public static final int META_SELECTOBJECT = 0x012D;
public static final int META_SETTEXTALIGN = 0x012E;
public static final int META_CHORD = 0x0830;
public static final int META_SETMAPPERFLAGS = 0x0231;
public static final int META_EXTTEXTOUT = 0x0a32;
public static final int META_SETDIBTODEV = 0x0d33;
public static final int META_SELECTPALETTE = 0x0234;
public static final int META_REALIZEPALETTE = 0x0035;
public static final int META_ANIMATEPALETTE = 0x0436;
public static final int META_SETPALENTRIES = 0x0037;
public static final int META_POLYPOLYGON = 0x0538;
public static final int META_RESIZEPALETTE = 0x0139;
public static final int META_DIBBITBLT = 0x0940;
public static final int META_DIBSTRETCHBLT = 0x0b41;
public static final int META_DIBCREATEPATTERNBRUSH = 0x0142;
public static final int META_STRETCHDIB = 0x0f43;
public static final int META_EXTFLOODFILL = 0x0548;
public static final int META_DELETEOBJECT = 0x01f0;
public static final int META_CREATEPALETTE = 0x00f7;
public static final int META_CREATEPATTERNBRUSH = 0x01F9;
public static final int META_CREATEPENINDIRECT = 0x02FA;
public static final int META_CREATEFONTINDIRECT = 0x02FB;
public static final int META_CREATEBRUSHINDIRECT = 0x02FC;
public static final int META_CREATEREGION = 0x06FF;
/**
* PdfCanvas of the MetaDo object.
*/
public PdfCanvas cb;
/**
* The InputMeta instance containing the data.
*/
public InputMeta in;
int left;
int top;
int right;
int bottom;
int inch;
MetaState state = new MetaState();
/**
* Creates a MetaDo instance.
*
* @param in inputstream containing the data
* @param cb PdfCanvas
*/
public MetaDo(InputStream in, PdfCanvas cb) {
this.cb = cb;
this.in = new InputMeta(in);
}
/**
* Reads and processes all the data of the InputMeta.
*
* @throws IOException an {@link IOException}
*/
public void readAll() throws IOException {
if (in.readInt() != 0x9AC6CDD7) {
throw new PdfException(PdfException.NotAPlaceableWindowsMetafile);
}
in.readWord();
left = in.readShort();
top = in.readShort();
right = in.readShort();
bottom = in.readShort();
inch = in.readWord();
state.setScalingX((float)(right - left) / (float)inch * 72f);
state.setScalingY((float)(bottom - top) / (float)inch * 72f);
state.setOffsetWx(left);
state.setOffsetWy(top);
state.setExtentWx(right - left);
state.setExtentWy(bottom - top);
in.readInt();
in.readWord();
in.skip(18);
int tsize;
int function;
cb.setLineCapStyle(PdfCanvasConstants.LineCapStyle.ROUND);
cb.setLineJoinStyle(PdfCanvasConstants.LineJoinStyle.ROUND);
for (;;) {
int lenMarker = in.getLength();
tsize = in.readInt();
if (tsize < 3)
break;
function = in.readWord();
switch (function) {
case 0:
break;
case META_CREATEPALETTE:
case META_CREATEREGION:
case META_DIBCREATEPATTERNBRUSH:
state.addMetaObject(new MetaObject());
break;
case META_CREATEPENINDIRECT:
{
MetaPen pen = new MetaPen();
pen.init(in);
state.addMetaObject(pen);
break;
}
case META_CREATEBRUSHINDIRECT:
{
MetaBrush brush = new MetaBrush();
brush.init(in);
state.addMetaObject(brush);
break;
}
case META_CREATEFONTINDIRECT:
{
MetaFont font = new MetaFont();
font.init(in);
state.addMetaObject(font);
break;
}
case META_SELECTOBJECT:
{
int idx = in.readWord();
state.selectMetaObject(idx, cb);
break;
}
case META_DELETEOBJECT:
{
int idx = in.readWord();
state.deleteMetaObject(idx);
break;
}
case META_SAVEDC:
state.saveState(cb);
break;
case META_RESTOREDC:
{
int idx = in.readShort();
state.restoreState(idx, cb);
break;
}
case META_SETWINDOWORG:
state.setOffsetWy(in.readShort());
state.setOffsetWx(in.readShort());
break;
case META_SETWINDOWEXT:
state.setExtentWy(in.readShort());
state.setExtentWx(in.readShort());
break;
case META_MOVETO:
{
int y = in.readShort();
Point p = new Point(in.readShort(), y);
state.setCurrentPoint(p);
break;
}
case META_LINETO:
{
int y = in.readShort();
int x = in.readShort();
Point p = state.getCurrentPoint();
cb.moveTo(state.transformX((int)p.getX()), state.transformY((int)p.getY()));
cb.lineTo(state.transformX(x), state.transformY(y));
cb.stroke();
state.setCurrentPoint(new Point(x, y));
break;
}
case META_POLYLINE:
{
state.setLineJoinPolygon(cb);
int len = in.readWord();
int x = in.readShort();
int y = in.readShort();
cb.moveTo(state.transformX(x), state.transformY(y));
for (int k = 1; k < len; ++k) {
x = in.readShort();
y = in.readShort();
cb.lineTo(state.transformX(x), state.transformY(y));
}
cb.stroke();
break;
}
case META_POLYGON:
{
if (isNullStrokeFill(false))
break;
int len = in.readWord();
int sx = in.readShort();
int sy = in.readShort();
cb.moveTo(state.transformX(sx), state.transformY(sy));
for (int k = 1; k < len; ++k) {
int x = in.readShort();
int y = in.readShort();
cb.lineTo(state.transformX(x), state.transformY(y));
}
cb.lineTo(state.transformX(sx), state.transformY(sy));
strokeAndFill();
break;
}
case META_POLYPOLYGON:
{
if (isNullStrokeFill(false))
break;
int numPoly = in.readWord();
int[] lens = new int[numPoly];
for (int k = 0; k < lens.length; ++k)
lens[k] = in.readWord();
for (int j = 0; j < lens.length; ++j) {
int len = lens[j];
int sx = in.readShort();
int sy = in.readShort();
cb.moveTo(state.transformX(sx), state.transformY(sy));
for (int k = 1; k < len; ++k) {
int x = in.readShort();
int y = in.readShort();
cb.lineTo(state.transformX(x), state.transformY(y));
}
cb.lineTo(state.transformX(sx), state.transformY(sy));
}
strokeAndFill();
break;
}
case META_ELLIPSE:
{
if (isNullStrokeFill(state.getLineNeutral()))
break;
int b = in.readShort();
int r = in.readShort();
int t = in.readShort();
int l = in.readShort();
cb.arc(state.transformX(l), state.transformY(b), state.transformX(r), state.transformY(t), 0, 360);
strokeAndFill();
break;
}
case META_ARC:
{
if (isNullStrokeFill(state.getLineNeutral()))
break;
float yend = state.transformY(in.readShort());
float xend = state.transformX(in.readShort());
float ystart = state.transformY(in.readShort());
float xstart = state.transformX(in.readShort());
float b = state.transformY(in.readShort());
float r = state.transformX(in.readShort());
float t = state.transformY(in.readShort());
float l = state.transformX(in.readShort());
float cx = (r + l) / 2;
float cy = (t + b) / 2;
float arc1 = getArc(cx, cy, xstart, ystart);
float arc2 = getArc(cx, cy, xend, yend);
arc2 -= arc1;
if (arc2 <= 0)
arc2 += 360;
cb.arc(l, b, r, t, arc1, arc2);
cb.stroke();
break;
}
case META_PIE:
{
if (isNullStrokeFill(state.getLineNeutral()))
break;
float yend = state.transformY(in.readShort());
float xend = state.transformX(in.readShort());
float ystart = state.transformY(in.readShort());
float xstart = state.transformX(in.readShort());
float b = state.transformY(in.readShort());
float r = state.transformX(in.readShort());
float t = state.transformY(in.readShort());
float l = state.transformX(in.readShort());
float cx = (r + l) / 2;
float cy = (t + b) / 2;
float arc1 = getArc(cx, cy, xstart, ystart);
float arc2 = getArc(cx, cy, xend, yend);
arc2 -= arc1;
if (arc2 <= 0)
arc2 += 360;
List ar = PdfCanvas.bezierArc(l, b, r, t, arc1, arc2);
if (ar.size() == 0)
break;
double[] pt = ar.get(0);
cb.moveTo(cx, cy);
cb.lineTo(pt[0], pt[1]);
for (int k = 0; k < ar.size(); ++k) {
pt = ar.get(k);
cb.curveTo(pt[2], pt[3], pt[4], pt[5], pt[6], pt[7]);
}
cb.lineTo(cx, cy);
strokeAndFill();
break;
}
case META_CHORD:
{
if (isNullStrokeFill(state.getLineNeutral()))
break;
float yend = state.transformY(in.readShort());
float xend = state.transformX(in.readShort());
float ystart = state.transformY(in.readShort());
float xstart = state.transformX(in.readShort());
float b = state.transformY(in.readShort());
float r = state.transformX(in.readShort());
float t = state.transformY(in.readShort());
float l = state.transformX(in.readShort());
float cx = (r + l) / 2;
float cy = (t + b) / 2;
float arc1 = getArc(cx, cy, xstart, ystart);
float arc2 = getArc(cx, cy, xend, yend);
arc2 -= arc1;
if (arc2 <= 0)
arc2 += 360;
List ar = PdfCanvas.bezierArc(l, b, r, t, arc1, arc2);
if (ar.size() == 0)
break;
double[] pt = ar.get(0);
cx = (float)pt[0];
cy = (float)pt[1];
cb.moveTo(cx, cy);
for (int k = 0; k < ar.size(); ++k) {
pt = ar.get(k);
cb.curveTo(pt[2], pt[3], pt[4], pt[5], pt[6], pt[7]);
}
cb.lineTo(cx, cy);
strokeAndFill();
break;
}
case META_RECTANGLE:
{
if (isNullStrokeFill(true))
break;
float b = state.transformY(in.readShort());
float r = state.transformX(in.readShort());
float t = state.transformY(in.readShort());
float l = state.transformX(in.readShort());
cb.rectangle(l, b, r - l, t - b);
strokeAndFill();
break;
}
case META_ROUNDRECT:
{
if (isNullStrokeFill(true))
break;
float h = state.transformY(0) - state.transformY(in.readShort());
float w = state.transformX(in.readShort()) - state.transformX(0);
float b = state.transformY(in.readShort());
float r = state.transformX(in.readShort());
float t = state.transformY(in.readShort());
float l = state.transformX(in.readShort());
cb.roundRectangle(l, b, r - l, t - b, (h + w) / 4);
strokeAndFill();
break;
}
case META_INTERSECTCLIPRECT:
{
float b = state.transformY(in.readShort());
float r = state.transformX(in.readShort());
float t = state.transformY(in.readShort());
float l = state.transformX(in.readShort());
cb.rectangle(l, b, r - l, t - b);
cb.eoClip();
cb.endPath();
break;
}
case META_EXTTEXTOUT:
{
int y = in.readShort();
int x = in.readShort();
int count = in.readWord();
int flag = in.readWord();
int x1 = 0;
int y1 = 0;
int x2 = 0;
int y2 = 0;
if ((flag & (MetaFont.ETO_CLIPPED | MetaFont.ETO_OPAQUE)) != 0) {
x1 = in.readShort();
y1 = in.readShort();
x2 = in.readShort();
y2 = in.readShort();
}
byte[] text = new byte[count];
int k;
for (k = 0; k < count; ++k) {
byte c = (byte)in.readByte();
if (c == 0)
break;
text[k] = c;
}
String s;
try {
s = new String(text, 0, k, "Cp1252");
}
catch (UnsupportedEncodingException e) {
s = new String(text, 0, k);
}
outputText(x, y, flag, x1, y1, x2, y2, s);
break;
}
case META_TEXTOUT:
{
int count = in.readWord();
byte[] text = new byte[count];
int k;
for (k = 0; k < count; ++k) {
byte c = (byte)in.readByte();
if (c == 0)
break;
text[k] = c;
}
String s;
try {
s = new String(text, 0, k, "Cp1252");
}
catch (UnsupportedEncodingException e) {
s = new String(text, 0, k);
}
count = count + 1 & 0xfffe;
in.skip(count - k);
int y = in.readShort();
int x = in.readShort();
outputText(x, y, 0, 0, 0, 0, 0, s);
break;
}
case META_SETBKCOLOR:
state.setCurrentBackgroundColor(in.readColor());
break;
case META_SETTEXTCOLOR:
state.setCurrentTextColor(in.readColor());
break;
case META_SETTEXTALIGN:
state.setTextAlign(in.readWord());
break;
case META_SETBKMODE:
state.setBackgroundMode(in.readWord());
break;
case META_SETPOLYFILLMODE:
state.setPolyFillMode(in.readWord());
break;
case META_SETPIXEL:
{
Color color = in.readColor();
int y = in.readShort();
int x = in.readShort();
cb.saveState();
cb.setFillColor(color);
cb.rectangle(state.transformX(x), state.transformY(y), .2f, .2f);
cb.fill();
cb.restoreState();
break;
}
case META_DIBSTRETCHBLT:
case META_STRETCHDIB: {
int rop = in.readInt();
if (function == META_STRETCHDIB) {
/*int usage = */ in.readWord();
}
int srcHeight = in.readShort();
int srcWidth = in.readShort();
int ySrc = in.readShort();
int xSrc = in.readShort();
float destHeight = state.transformY(in.readShort()) - state.transformY(0);
float destWidth = state.transformX(in.readShort()) - state.transformX(0);
float yDest = state.transformY(in.readShort());
float xDest = state.transformX(in.readShort());
byte[] b = new byte[tsize * 2 - (in.getLength() - lenMarker)];
for (int k = 0; k < b.length; ++k)
b[k] = (byte)in.readByte();
try {
cb.saveState();
cb.rectangle(xDest, yDest, destWidth, destHeight);
cb.clip();
cb.endPath();
ImageData bmpImage = ImageDataFactory.createBmp(b, true);
PdfImageXObject imageXObject = new PdfImageXObject(bmpImage);
float width = destWidth * bmpImage.getWidth() / srcWidth;
float height = -destHeight * bmpImage.getHeight() / srcHeight;
float x = xDest - destWidth * xSrc / srcWidth;
float y = yDest + destHeight * ySrc / srcHeight - height;
cb.addXObject(imageXObject, new Rectangle(x, y, width, height));
cb.restoreState();
}
catch (Exception e) {
// empty on purpose
}
break;
}
}
in.skip(tsize * 2 - (in.getLength() - lenMarker));
}
state.cleanup(cb);
}
/**
* Output Text at a certain x and y coordinate. Clipped or opaque text isn't supported as of yet.
*
* @param x x-coordinate
* @param y y-coordinate
* @param flag flag indicating clipped or opaque
* @param x1 x1-coordinate of the rectangle if clipped or opaque
* @param y1 y1-coordinate of the rectangle if clipped or opaque
* @param x2 x2-coordinate of the rectangle if clipped or opaque
* @param y2 y1-coordinate of the rectangle if clipped or opaque
* @param text text to output
* @throws IOException an {@link IOException}
*/
public void outputText(int x, int y, int flag, int x1, int y1, int x2, int y2, String text) throws IOException {
MetaFont font = state.getCurrentFont();
float refX = state.transformX(x);
float refY = state.transformY(y);
float angle = state.transformAngle(font.getAngle());
float sin = (float)Math.sin(angle);
float cos = (float)Math.cos(angle);
float fontSize = font.getFontSize(state);
FontProgram fp = font.getFont();
int align = state.getTextAlign();
// NOTE, MetaFont always creates with CP1252 encoding.
int normalizedWidth = 0;
byte[] bytes = font.encoding.convertToBytes(text);
for (byte b : bytes) {
normalizedWidth += fp.getWidth(0xff & b);
}
float textWidth = fontSize / FontProgram.UNITS_NORMALIZATION * normalizedWidth;
float tx = 0;
float ty = 0;
float descender = fp.getFontMetrics().getTypoDescender();
float ury = fp.getFontMetrics().getBbox()[3];
cb.saveState();
cb.concatMatrix(cos, sin, -sin, cos, refX, refY);
if ((align & MetaState.TA_CENTER) == MetaState.TA_CENTER) {
tx = -textWidth / 2;
} else if ((align & MetaState.TA_RIGHT) == MetaState.TA_RIGHT) {
tx = -textWidth;
} if ((align & MetaState.TA_BASELINE) == MetaState.TA_BASELINE) {
ty = 0;
} else if ((align & MetaState.TA_BOTTOM) == MetaState.TA_BOTTOM) {
ty = -descender;
} else {
ty = -ury;
}
Color textColor;
if (state.getBackgroundMode() == MetaState.OPAQUE) {
textColor = state.getCurrentBackgroundColor();
cb.setFillColor(textColor);
cb.rectangle(tx, ty + descender, textWidth, ury - descender);
cb.fill();
}
textColor = state.getCurrentTextColor();
cb.setFillColor(textColor);
cb.beginText();
cb.setFontAndSize(PdfFontFactory.createFont(state.getCurrentFont().getFont(),
PdfEncodings.CP1252, EmbeddingStrategy.PREFER_EMBEDDED), fontSize);
cb.setTextMatrix(tx, ty);
cb.showText(text);
cb.endText();
if (font.isUnderline()) {
cb.rectangle(tx, ty - fontSize / 4, textWidth, fontSize / 15);
cb.fill();
}
if (font.isStrikeout()) {
cb.rectangle(tx, ty + fontSize / 3, textWidth, fontSize / 15);
cb.fill();
}
cb.restoreState();
}
/**
* Return true if the pen style is null and if it isn't a brush.
*
* @param isRectangle value to decide how to change the state. If true state.setLineJoinRectangle(cb) is called,
* if false state.setLineJoinPolygon(cb) is called.
* @return true if the pen style is null and if it isn't a brush
*/
public boolean isNullStrokeFill(boolean isRectangle) {
MetaPen pen = state.getCurrentPen();
MetaBrush brush = state.getCurrentBrush();
boolean noPen = pen.getStyle() == MetaPen.PS_NULL;
int style = brush.getStyle();
boolean isBrush = style == MetaBrush.BS_SOLID || style == MetaBrush.BS_HATCHED && state.getBackgroundMode() == MetaState.OPAQUE;
boolean result = noPen && !isBrush;
if (!noPen) {
if (isRectangle)
state.setLineJoinRectangle(cb);
else
state.setLineJoinPolygon(cb);
}
return result;
}
/**
* Stroke and fill the MetaPen and MetaBrush paths.
*/
public void strokeAndFill() {
MetaPen pen = state.getCurrentPen();
MetaBrush brush = state.getCurrentBrush();
int penStyle = pen.getStyle();
int brushStyle = brush.getStyle();
if (penStyle == MetaPen.PS_NULL) {
cb.closePath();
if (state.getPolyFillMode() == MetaState.ALTERNATE) {
cb.eoFill();
}
else {
cb.fill();
}
}
else {
boolean isBrush = brushStyle == MetaBrush.BS_SOLID || brushStyle == MetaBrush.BS_HATCHED && state.getBackgroundMode() == MetaState.OPAQUE;
if (isBrush) {
if (state.getPolyFillMode() == MetaState.ALTERNATE)
cb.closePathEoFillStroke();
else
cb.closePathFillStroke();
}
else {
cb.closePathStroke();
}
}
}
static float getArc(float xCenter, float yCenter, float xDot, float yDot) {
double s = Math.atan2(yDot - yCenter, xDot - xCenter);
if (s < 0)
s += Math.PI * 2;
return (float)(s / Math.PI * 180);
}
/**
* Wrap a BMP image in an WMF.
*
* @param image the BMP image to be wrapped
* @return the wrapped BMP
* @throws IOException an {@link IOException}
*/
public static byte[] wrapBMP(ImageData image) throws IOException {
if (image.getOriginalType() != ImageType.BMP) {
throw new PdfException(PdfException.OnlyBmpCanBeWrappedInWmf);
}
InputStream imgIn;
byte data[];
if (image.getData() == null) {
imgIn = image.getUrl().openStream();
ByteArrayOutputStream out = new ByteArrayOutputStream();
int b = 0;
while ((b = imgIn.read()) != -1)
out.write(b);
imgIn.close();
data = out.toByteArray();
} else {
data = image.getData();
}
int sizeBmpWords = data.length - 14 + 1 >>> 1;
ByteArrayOutputStream os = new ByteArrayOutputStream();
// write metafile header
writeWord(os, 1);
writeWord(os, 9);
writeWord(os, 0x0300);
// total metafile size
writeDWord(os, 9 + 4 + 5 + 5 + 13 + sizeBmpWords + 3);
writeWord(os, 1);
// max record size
writeDWord(os, 14 + sizeBmpWords);
writeWord(os, 0);
// write records
writeDWord(os, 4);
writeWord(os, META_SETMAPMODE);
writeWord(os, 8);
writeDWord(os, 5);
writeWord(os, META_SETWINDOWORG);
writeWord(os, 0);
writeWord(os, 0);
writeDWord(os, 5);
writeWord(os, META_SETWINDOWEXT);
writeWord(os, (int)image.getHeight());
writeWord(os, (int)image.getWidth());
writeDWord(os, 13 + sizeBmpWords);
writeWord(os, META_DIBSTRETCHBLT);
writeDWord(os, 0x00cc0020);
writeWord(os, (int)image.getHeight());
writeWord(os, (int)image.getWidth());
writeWord(os, 0);
writeWord(os, 0);
writeWord(os, (int)image.getHeight());
writeWord(os, (int)image.getWidth());
writeWord(os, 0);
writeWord(os, 0);
os.write(data, 14, data.length - 14);
if ((data.length & 1) == 1) {
os.write(0);
}
writeDWord(os, 3);
writeWord(os, 0);
os.close();
return os.toByteArray();
}
/**
* Writes the specified value to the specified outputstream as a word.
*
* @param os outputstream to write the word to
* @param v value to be written
* @throws IOException an {@link IOException}
*/
public static void writeWord(OutputStream os, int v) throws IOException {
os.write(v & 0xff);
os.write(v >>> 8 & 0xff);
}
/**
* Writes the specified value to the specified outputstream as a dword.
*
* @param os outputstream to write the dword to
* @param v value to be written
* @throws IOException an {@link IOException}
*/
public static void writeDWord(OutputStream os, int v) throws IOException {
writeWord(os, v & 0xffff);
writeWord(os, v >>> 16 & 0xffff);
}
}
