-
WPathGraphics
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DEFAULT_USER_RES: int
-
MIN_DEVICE_LINEWIDTH: float
-
MAX_THINLINE_INCHES: float
-
useGDITextLayout: boolean
-
preferGDITextLayout: boolean
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static class initializer
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WPathGraphics(Graphics2D, PrinterJob, Printable, PageFormat, int, boolean): void
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create(): Graphics
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draw(Shape): void
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drawString(String, int, int): void
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drawString(String, float, float): void
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platformFontCount(Font, String): int
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isXP(): boolean
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strNeedsTextLayout(String, Font): boolean
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getAngle(Double): int
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getAwScale(double, double): float
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drawString(String, float, float, Font, FontRenderContext, float): void
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printGlyphVector(GlyphVector, float, float): boolean
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textOut(String, Font, PhysicalFont, FontRenderContext, float, int, float, double, double, float, float, float, float, float): void
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okGDIMetrics(String, Font, FontRenderContext, double): boolean
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drawImageToPlatform(Image, AffineTransform, Color, int, int, int, int, boolean): boolean
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redrawRegion(Rectangle2D, double, double, Shape, AffineTransform): void
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deviceFill(PathIterator, Color): void
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deviceClip(PathIterator): void
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deviceFrameRect(int, int, int, int, Color): void
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deviceFillRect(int, int, int, int, Color): void
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deviceDrawLine(int, int, int, int, Color): void
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convertToWPath(PathIterator): void
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/*
* Copyright (c) 1998, 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.awt.windows;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.Transparency;
import java.awt.font.FontRenderContext;
import java.awt.font.GlyphVector;
import java.awt.font.TextLayout;
import java.awt.geom.AffineTransform;
import java.awt.geom.NoninvertibleTransformException;
import java.awt.geom.PathIterator;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.awt.geom.Line2D;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.DataBuffer;
import java.awt.image.IndexColorModel;
import java.awt.image.WritableRaster;
import java.awt.image.ComponentSampleModel;
import java.awt.image.MultiPixelPackedSampleModel;
import java.awt.image.SampleModel;
import sun.awt.image.ByteComponentRaster;
import sun.awt.image.BytePackedRaster;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;
import java.util.Arrays;
import sun.font.CharToGlyphMapper;
import sun.font.CompositeFont;
import sun.font.Font2D;
import sun.font.FontUtilities;
import sun.font.PhysicalFont;
import sun.font.TrueTypeFont;
import sun.print.PathGraphics;
import sun.print.ProxyGraphics2D;
final class WPathGraphics extends PathGraphics {
For a drawing application the initial user space
resolution is 72dpi.
/**
* For a drawing application the initial user space
* resolution is 72dpi.
*/
private static final int DEFAULT_USER_RES = 72;
private static final float MIN_DEVICE_LINEWIDTH = 1.2f;
private static final float MAX_THINLINE_INCHES = 0.014f;
/* Note that preferGDITextLayout implies useGDITextLayout.
* "prefer" is used to override cases where would otherwise
* choose not to use it. Note that non-layout factors may
* still mean that GDI cannot be used.
*/
private static boolean useGDITextLayout = true;
private static boolean preferGDITextLayout = false;
static {
String textLayoutStr =
(String)java.security.AccessController.doPrivileged(
new sun.security.action.GetPropertyAction(
"sun.java2d.print.enableGDITextLayout"));
if (textLayoutStr != null) {
useGDITextLayout = Boolean.getBoolean(textLayoutStr);
if (!useGDITextLayout) {
if (textLayoutStr.equalsIgnoreCase("prefer")) {
useGDITextLayout = true;
preferGDITextLayout = true;
}
}
}
}
WPathGraphics(Graphics2D graphics, PrinterJob printerJob,
Printable painter, PageFormat pageFormat, int pageIndex,
boolean canRedraw) {
super(graphics, printerJob, painter, pageFormat, pageIndex, canRedraw);
}
Creates a new Graphics object that is
a copy of this Graphics object.
Returns: a new graphics context that is a copy of
this graphics context. Since: JDK1.0
/**
* Creates a new <code>Graphics</code> object that is
* a copy of this <code>Graphics</code> object.
* @return a new graphics context that is a copy of
* this graphics context.
* @since JDK1.0
*/
@Override
public Graphics create() {
return new WPathGraphics((Graphics2D) getDelegate().create(),
getPrinterJob(),
getPrintable(),
getPageFormat(),
getPageIndex(),
canDoRedraws());
}
Strokes the outline of a Shape using the settings of the current
graphics state. The rendering attributes applied include the
clip, transform, paint or color, composite and stroke attributes.
Params: - s – The shape to be drawn.
See Also:
/**
* Strokes the outline of a Shape using the settings of the current
* graphics state. The rendering attributes applied include the
* clip, transform, paint or color, composite and stroke attributes.
* @param s The shape to be drawn.
* @see #setStroke
* @see #setPaint
* @see java.awt.Graphics#setColor
* @see #transform
* @see #setTransform
* @see #clip
* @see #setClip
* @see #setComposite
*/
@Override
public void draw(Shape s) {
Stroke stroke = getStroke();
/* If the line being drawn is thinner than can be
* rendered, then change the line width, stroke
* the shape, and then set the line width back.
* We can only do this for BasicStroke's.
*/
if (stroke instanceof BasicStroke) {
BasicStroke lineStroke;
BasicStroke minLineStroke = null;
float deviceLineWidth;
float lineWidth;
AffineTransform deviceTransform;
Point2D.Float penSize;
/* Get the requested line width in user space.
*/
lineStroke = (BasicStroke) stroke;
lineWidth = lineStroke.getLineWidth();
penSize = new Point2D.Float(lineWidth, lineWidth);
/* Compute the line width in device coordinates.
* Work on a point in case there is asymetric scaling
* between user and device space.
* Take the absolute value in case there is negative
* scaling in effect.
*/
deviceTransform = getTransform();
deviceTransform.deltaTransform(penSize, penSize);
deviceLineWidth = Math.min(Math.abs(penSize.x),
Math.abs(penSize.y));
/* If the requested line is too thin then map our
* minimum line width back to user space and set
* a new BasicStroke.
*/
if (deviceLineWidth < MIN_DEVICE_LINEWIDTH) {
Point2D.Float minPenSize = new Point2D.Float(
MIN_DEVICE_LINEWIDTH,
MIN_DEVICE_LINEWIDTH);
try {
AffineTransform inverse;
float minLineWidth;
/* Convert the minimum line width from device
* space to user space.
*/
inverse = deviceTransform.createInverse();
inverse.deltaTransform(minPenSize, minPenSize);
minLineWidth = Math.max(Math.abs(minPenSize.x),
Math.abs(minPenSize.y));
/* Use all of the parameters from the current
* stroke but change the line width to our
* calculated minimum.
*/
minLineStroke = new BasicStroke(minLineWidth,
lineStroke.getEndCap(),
lineStroke.getLineJoin(),
lineStroke.getMiterLimit(),
lineStroke.getDashArray(),
lineStroke.getDashPhase());
setStroke(minLineStroke);
} catch (NoninvertibleTransformException e) {
/* If we can't invert the matrix there is something
* very wrong so don't worry about the minor matter
* of a minimum line width.
*/
}
}
super.draw(s);
/* If we changed the stroke, put back the old
* stroke in order to maintain a minimum line
* width.
*/
if (minLineStroke != null) {
setStroke(lineStroke);
}
/* The stroke in effect was not a BasicStroke so we
* will not try to enforce a minimum line width.
*/
} else {
super.draw(s);
}
}
Draws the text given by the specified string, using this
graphics context's current font and color. The baseline of the
first character is at position (x, y) in this
graphics context's coordinate system.
Params: - str – the string to be drawn.
- x – the x coordinate.
- y – the y coordinate.
See Also: Since: JDK1.0
/**
* Draws the text given by the specified string, using this
* graphics context's current font and color. The baseline of the
* first character is at position (<i>x</i>, <i>y</i>) in this
* graphics context's coordinate system.
* @param str the string to be drawn.
* @param x the <i>x</i> coordinate.
* @param y the <i>y</i> coordinate.
* @see java.awt.Graphics#drawBytes
* @see java.awt.Graphics#drawChars
* @since JDK1.0
*/
@Override
public void drawString(String str, int x, int y) {
drawString(str, (float) x, (float) y);
}
@Override
public void drawString(String str, float x, float y) {
drawString(str, x, y, getFont(), getFontRenderContext(), 0f);
}
/* A return value of 0 would mean font not available to GDI, or the
* it can't be used for this string.
* A return of 1 means it is suitable, including for composites.
* We check that the transform in effect is doable with GDI, and that
* this is a composite font AWT can handle, or a physical font GDI
* can handle directly. Its possible that some strings may ultimately
* fail the more stringent tests in drawString but this is rare and
* also that method will always succeed, as if the font isn't available
* it will use outlines via a superclass call. Also it is only called for
* the default render context (as canDrawStringToWidth() will return
* false. That is why it ignores the frc and width arguments.
*/
@Override
protected int platformFontCount(Font font, String str) {
AffineTransform deviceTransform = getTransform();
AffineTransform fontTransform = new AffineTransform(deviceTransform);
fontTransform.concatenate(getFont().getTransform());
int transformType = fontTransform.getType();
/* Test if GDI can handle the transform */
boolean directToGDI = ((transformType !=
AffineTransform.TYPE_GENERAL_TRANSFORM)
&& ((transformType & AffineTransform.TYPE_FLIP)
== 0));
if (!directToGDI) {
return 0;
}
/* Since all windows fonts are available, and the JRE fonts
* are also registered. Only the Font.createFont() case is presently
* unknown to GDI. Those can be registered too, although that
* code does not exist yet, it can be added too, so we should not
* fail that case. Just do a quick check whether its a TrueTypeFont
* - ie not a Type1 font etc, and let drawString() resolve the rest.
*/
Font2D font2D = FontUtilities.getFont2D(font);
if (font2D instanceof CompositeFont ||
font2D instanceof TrueTypeFont) {
return 1;
} else {
return 0;
}
}
private static boolean isXP() {
String osVersion = System.getProperty("os.version");
if (osVersion != null) {
Float version = Float.valueOf(osVersion);
return (version.floatValue() >= 5.1f);
} else {
return false;
}
}
/* In case GDI doesn't handle shaping or BIDI consistently with
* 2D's TextLayout, we can detect these cases and redelegate up to
* be drawn via TextLayout, which in is rendered as runs of
* GlyphVectors, to which we can assign positions for each glyph.
*/
private boolean strNeedsTextLayout(String str, Font font) {
char[] chars = str.toCharArray();
boolean isComplex = FontUtilities.isComplexText(chars, 0, chars.length);
if (!isComplex) {
return false;
} else if (!useGDITextLayout) {
return true;
} else {
if (preferGDITextLayout ||
(isXP() && FontUtilities.textLayoutIsCompatible(font))) {
return false;
} else {
return true;
}
}
}
private int getAngle(Point2D.Double pt) {
/* Get the rotation in 1/10'ths degree (as needed by Windows)
* so that GDI can draw the text rotated.
* This calculation is only valid for a uniform scale, no shearing.
*/
double angle = Math.toDegrees(Math.atan2(pt.y, pt.x));
if (angle < 0.0) {
angle+= 360.0;
}
/* Windows specifies the rotation anti-clockwise from the x-axis
* of the device, 2D specifies +ve rotation towards the y-axis
* Since the 2D y-axis runs from top-to-bottom, windows angle of
* rotation here is opposite than 2D's, so the rotation needed
* needs to be recalculated in the opposite direction.
*/
if (angle != 0.0) {
angle = 360.0 - angle;
}
return (int)Math.round(angle * 10.0);
}
private float getAwScale(double scaleFactorX, double scaleFactorY) {
float awScale = (float)(scaleFactorX/scaleFactorY);
/* don't let rounding errors be interpreted as non-uniform scale */
if (awScale > 0.999f && awScale < 1.001f) {
awScale = 1.0f;
}
return awScale;
}
Renders the text specified by the specified String,
using the current Font and Paint attributes
in the Graphics2D context.
The baseline of the first character is at position
(x, y) in the User Space.
The rendering attributes applied include the Clip,
Transform, Paint, Font and
Composite attributes. For characters in script systems
such as Hebrew and Arabic, the glyphs can be rendered from right to
left, in which case the coordinate supplied is the location of the
leftmost character on the baseline.
Params: - s – the
String to be rendered
See Also: @param x, y the coordinates where the String
should be rendered
/**
* Renders the text specified by the specified <code>String</code>,
* using the current <code>Font</code> and <code>Paint</code> attributes
* in the <code>Graphics2D</code> context.
* The baseline of the first character is at position
* (<i>x</i>, <i>y</i>) in the User Space.
* The rendering attributes applied include the <code>Clip</code>,
* <code>Transform</code>, <code>Paint</code>, <code>Font</code> and
* <code>Composite</code> attributes. For characters in script systems
* such as Hebrew and Arabic, the glyphs can be rendered from right to
* left, in which case the coordinate supplied is the location of the
* leftmost character on the baseline.
* @param s the <code>String</code> to be rendered
* @param x, y the coordinates where the <code>String</code>
* should be rendered
* @see #setPaint
* @see java.awt.Graphics#setColor
* @see java.awt.Graphics#setFont
* @see #setTransform
* @see #setComposite
* @see #setClip
*/
@Override
public void drawString(String str, float x, float y,
Font font, FontRenderContext frc, float targetW) {
if (str.length() == 0) {
return;
}
if (WPrinterJob.shapeTextProp) {
super.drawString(str, x, y, font, frc, targetW);
return;
}
/* If the Font has layout attributes we need to delegate to TextLayout.
* TextLayout renders text as GlyphVectors. We try to print those
* using printer fonts - ie using Postscript text operators so
* we may be reinvoked. In that case the "!printingGlyphVector" test
* prevents us recursing and instead sends us into the body of the
* method where we can safely ignore layout attributes as those
* are already handled by TextLayout.
* Similarly if layout is needed based on the text, then we
* delegate to TextLayout if possible, or failing that we delegate
* upwards to filled shapes.
*/
boolean layoutNeeded = strNeedsTextLayout(str, font);
if ((font.hasLayoutAttributes() || layoutNeeded)
&& !printingGlyphVector) {
TextLayout layout = new TextLayout(str, font, frc);
layout.draw(this, x, y);
return;
} else if (layoutNeeded) {
super.drawString(str, x, y, font, frc, targetW);
return;
}
AffineTransform deviceTransform = getTransform();
AffineTransform fontTransform = new AffineTransform(deviceTransform);
fontTransform.concatenate(font.getTransform());
int transformType = fontTransform.getType();
/* Use GDI for the text if the graphics transform is something
* for which we can obtain a suitable GDI font.
* A flip or shearing transform on the graphics or a transform
* on the font force us to decompose the text into a shape.
*/
boolean directToGDI = ((transformType !=
AffineTransform.TYPE_GENERAL_TRANSFORM)
&& ((transformType & AffineTransform.TYPE_FLIP)
== 0));
WPrinterJob wPrinterJob = (WPrinterJob) getPrinterJob();
try {
wPrinterJob.setTextColor((Color)getPaint());
} catch (ClassCastException e) { // peek should detect such paints.
directToGDI = false;
}
if (!directToGDI) {
super.drawString(str, x, y, font, frc, targetW);
return;
}
/* Now we have checked everything is OK to go through GDI as text
* with the exception of testing GDI can find and use the font. That
* is handled in the textOut() call.
*/
/* Compute the starting position of the string in
* device space.
*/
Point2D.Float userpos = new Point2D.Float(x, y);
Point2D.Float devpos = new Point2D.Float();
/* Already have the translate from the deviceTransform,
* but the font may have a translation component too.
*/
if (font.isTransformed()) {
AffineTransform fontTx = font.getTransform();
float translateX = (float)(fontTx.getTranslateX());
float translateY = (float)(fontTx.getTranslateY());
if (Math.abs(translateX) < 0.00001) translateX = 0f;
if (Math.abs(translateY) < 0.00001) translateY = 0f;
userpos.x += translateX; userpos.y += translateY;
}
deviceTransform.transform(userpos, devpos);
if (getClip() != null) {
deviceClip(getClip().getPathIterator(deviceTransform));
}
/* Get the font size in device coordinates.
* The size needed is the font height scaled to device space.
* Although we have already tested that there is no shear,
* there may be a non-uniform scale, so the width of the font
* does not scale equally with the height. That is handled
* by specifying an 'average width' scale to GDI.
*/
float fontSize = font.getSize2D();
double devResX = wPrinterJob.getXRes();
double devResY = wPrinterJob.getYRes();
double fontDevScaleY = devResY / DEFAULT_USER_RES;
int orient = getPageFormat().getOrientation();
if (orient == PageFormat.LANDSCAPE ||
orient == PageFormat.REVERSE_LANDSCAPE)
{
double tmp = devResX;
devResX = devResY;
devResY = tmp;
}
double devScaleX = devResX / DEFAULT_USER_RES;
double devScaleY = devResY / DEFAULT_USER_RES;
fontTransform.scale(1.0/devScaleX, 1.0/devScaleY);
Point2D.Double pty = new Point2D.Double(0.0, 1.0);
fontTransform.deltaTransform(pty, pty);
double scaleFactorY = Math.sqrt(pty.x*pty.x+pty.y*pty.y);
float scaledFontSizeY = (float)(fontSize * scaleFactorY * fontDevScaleY);
Point2D.Double ptx = new Point2D.Double(1.0, 0.0);
fontTransform.deltaTransform(ptx, ptx);
double scaleFactorX = Math.sqrt(ptx.x*ptx.x+ptx.y*ptx.y);
float awScale = getAwScale(scaleFactorX, scaleFactorY);
int iangle = getAngle(ptx);
ptx = new Point2D.Double(1.0, 0.0);
deviceTransform.deltaTransform(ptx, ptx);
double advanceScaleX = Math.sqrt(ptx.x*ptx.x+ptx.y*ptx.y);
pty = new Point2D.Double(0.0, 1.0);
deviceTransform.deltaTransform(pty, pty);
double advanceScaleY = Math.sqrt(pty.x*pty.x+pty.y*pty.y);
Font2D font2D = FontUtilities.getFont2D(font);
if (font2D instanceof TrueTypeFont) {
textOut(str, font, (TrueTypeFont)font2D, frc,
scaledFontSizeY, iangle, awScale,
advanceScaleX, advanceScaleY,
x, y, devpos.x, devpos.y, targetW);
} else if (font2D instanceof CompositeFont) {
/* Composite fonts are made up of multiple fonts and each
* substring that uses a particular component font needs to
* be separately sent to GDI.
* This works for standard composite fonts, alternate ones,
* Fonts that are a physical font backed by a standard composite,
* and with fallback fonts.
*/
CompositeFont compFont = (CompositeFont)font2D;
float userx = x, usery = y;
float devx = devpos.x, devy = devpos.y;
char[] chars = str.toCharArray();
int len = chars.length;
int[] glyphs = new int[len];
compFont.getMapper().charsToGlyphs(len, chars, glyphs);
int startChar = 0, endChar = 0, slot = 0;
while (endChar < len) {
startChar = endChar;
slot = glyphs[startChar] >>> 24;
while (endChar < len && ((glyphs[endChar] >>> 24) == slot)) {
endChar++;
}
String substr = new String(chars, startChar,endChar-startChar);
PhysicalFont slotFont = compFont.getSlotFont(slot);
textOut(substr, font, slotFont, frc,
scaledFontSizeY, iangle, awScale,
advanceScaleX, advanceScaleY,
userx, usery, devx, devy, 0f);
Rectangle2D bds = font.getStringBounds(substr, frc);
float xAdvance = (float)bds.getWidth();
userx += xAdvance;
userpos.x += xAdvance;
deviceTransform.transform(userpos, devpos);
devx = devpos.x;
devy = devpos.y;
}
} else {
super.drawString(str, x, y, font, frc, targetW);
}
}
return true if the Graphics instance can directly print
this glyphvector
/** return true if the Graphics instance can directly print
* this glyphvector
*/
@Override
protected boolean printGlyphVector(GlyphVector gv, float x, float y) {
/* We don't want to try to handle per-glyph transforms. GDI can't
* handle per-glyph rotations, etc. There's no way to express it
* in a single call, so just bail for this uncommon case.
*/
if ((gv.getLayoutFlags() & GlyphVector.FLAG_HAS_TRANSFORMS) != 0) {
return false;
}
if (gv.getNumGlyphs() == 0) {
return true; // nothing to do.
}
AffineTransform deviceTransform = getTransform();
AffineTransform fontTransform = new AffineTransform(deviceTransform);
Font font = gv.getFont();
fontTransform.concatenate(font.getTransform());
int transformType = fontTransform.getType();
/* Use GDI for the text if the graphics transform is something
* for which we can obtain a suitable GDI font.
* A flip or shearing transform on the graphics or a transform
* on the font force us to decompose the text into a shape.
*/
boolean directToGDI =
((transformType != AffineTransform.TYPE_GENERAL_TRANSFORM) &&
((transformType & AffineTransform.TYPE_FLIP) == 0));
WPrinterJob wPrinterJob = (WPrinterJob) getPrinterJob();
try {
wPrinterJob.setTextColor((Color)getPaint());
} catch (ClassCastException e) { // peek should detect such paints.
directToGDI = false;
}
if (WPrinterJob.shapeTextProp || !directToGDI) {
return false;
}
/* Compute the starting position of the string in
* device space.
*/
Point2D.Float userpos = new Point2D.Float(x, y);
/* Add the position of the first glyph - its not always 0,0 */
Point2D g0pos = gv.getGlyphPosition(0);
userpos.x += (float)g0pos.getX();
userpos.y += (float)g0pos.getY();
Point2D.Float devpos = new Point2D.Float();
/* Already have the translate from the deviceTransform,
* but the font may have a translation component too.
*/
if (font.isTransformed()) {
AffineTransform fontTx = font.getTransform();
float translateX = (float)(fontTx.getTranslateX());
float translateY = (float)(fontTx.getTranslateY());
if (Math.abs(translateX) < 0.00001) translateX = 0f;
if (Math.abs(translateY) < 0.00001) translateY = 0f;
userpos.x += translateX; userpos.y += translateY;
}
deviceTransform.transform(userpos, devpos);
if (getClip() != null) {
deviceClip(getClip().getPathIterator(deviceTransform));
}
/* Get the font size in device coordinates.
* The size needed is the font height scaled to device space.
* Although we have already tested that there is no shear,
* there may be a non-uniform scale, so the width of the font
* does not scale equally with the height. That is handled
* by specifying an 'average width' scale to GDI.
*/
float fontSize = font.getSize2D();
double devResX = wPrinterJob.getXRes();
double devResY = wPrinterJob.getYRes();
double fontDevScaleY = devResY / DEFAULT_USER_RES;
int orient = getPageFormat().getOrientation();
if (orient == PageFormat.LANDSCAPE ||
orient == PageFormat.REVERSE_LANDSCAPE)
{
double tmp = devResX;
devResX = devResY;
devResY = tmp;
}
double devScaleX = devResX / DEFAULT_USER_RES;
double devScaleY = devResY / DEFAULT_USER_RES;
fontTransform.scale(1.0/devScaleX, 1.0/devScaleY);
Point2D.Double pty = new Point2D.Double(0.0, 1.0);
fontTransform.deltaTransform(pty, pty);
double scaleFactorY = Math.sqrt(pty.x*pty.x+pty.y*pty.y);
float scaledFontSizeY = (float)(fontSize * scaleFactorY * fontDevScaleY);
Point2D.Double ptx = new Point2D.Double(1.0, 0.0);
fontTransform.deltaTransform(ptx, ptx);
double scaleFactorX = Math.sqrt(ptx.x*ptx.x+ptx.y*ptx.y);
float awScale = getAwScale(scaleFactorX, scaleFactorY);
int iangle = getAngle(ptx);
ptx = new Point2D.Double(1.0, 0.0);
deviceTransform.deltaTransform(ptx, ptx);
double advanceScaleX = Math.sqrt(ptx.x*ptx.x+ptx.y*ptx.y);
pty = new Point2D.Double(0.0, 1.0);
deviceTransform.deltaTransform(pty, pty);
double advanceScaleY = Math.sqrt(pty.x*pty.x+pty.y*pty.y);
int numGlyphs = gv.getNumGlyphs();
int[] glyphCodes = gv.getGlyphCodes(0, numGlyphs, null);
float[] glyphPos = gv.getGlyphPositions(0, numGlyphs, null);
/* layout replaces glyphs which have been combined away
* with 0xfffe or 0xffff. These are supposed to be invisible
* and we need to handle this here as GDI will interpret it
* as a missing glyph. We'll do it here by compacting the
* glyph codes array, but we have to do it in conjunction with
* compacting the positions/advances arrays too AND updating
* the number of glyphs ..
* Note that since the slot number for composites is in the
* significant byte we need to mask out that for comparison of
* the invisible glyph.
*/
int invisibleGlyphCnt = 0;
for (int gc=0; gc<numGlyphs; gc++) {
if ((glyphCodes[gc] & 0xffff) >=
CharToGlyphMapper.INVISIBLE_GLYPHS) {
invisibleGlyphCnt++;
}
}
if (invisibleGlyphCnt > 0) {
int visibleGlyphCnt = numGlyphs - invisibleGlyphCnt;
int[] visibleGlyphCodes = new int[visibleGlyphCnt];
float[] visiblePositions = new float[visibleGlyphCnt*2];
int index = 0;
for (int i=0; i<numGlyphs; i++) {
if ((glyphCodes[i] & 0xffff)
< CharToGlyphMapper.INVISIBLE_GLYPHS) {
visibleGlyphCodes[index] = glyphCodes[i];
visiblePositions[index*2] = glyphPos[i*2];
visiblePositions[index*2+1] = glyphPos[i*2+1];
index++;
}
}
numGlyphs = visibleGlyphCnt;
glyphCodes = visibleGlyphCodes;
glyphPos = visiblePositions;
}
/* To get GDI to rotate glyphs we need to specify the angle
* of rotation to GDI when creating the HFONT. This implicitly
* also rotates the baseline, and this adjusts the X & Y advances
* of the glyphs accordingly.
* When we specify the advances, they are in device space, so
* we don't want any further interpretation applied by GDI, but
* since as noted the advances are interpreted in the HFONT's
* coordinate space, our advances would be rotated again.
* We don't have any way to tell GDI to rotate only the glyphs and
* not the advances, so we need to account for this in the advances
* we supply, by supplying unrotated advances.
* Note that "iangle" is in the opposite direction to 2D's normal
* direction of rotation, so this rotation inverts the
* rotation element of the deviceTransform.
*/
AffineTransform advanceTransform =
AffineTransform.getScaleInstance(advanceScaleX, advanceScaleY);
float[] glyphAdvPos = new float[glyphPos.length];
advanceTransform.transform(glyphPos, 0, //source
glyphAdvPos, 0, //destination
glyphPos.length/2); //num points
Font2D font2D = FontUtilities.getFont2D(font);
if (font2D instanceof TrueTypeFont) {
String family = font2D.getFamilyName(null);
int style = font.getStyle() | font2D.getStyle();
if (!wPrinterJob.setFont(family, scaledFontSizeY, style,
iangle, awScale)) {
return false;
}
wPrinterJob.glyphsOut(glyphCodes, devpos.x, devpos.y, glyphAdvPos);
} else if (font2D instanceof CompositeFont) {
/* Composite fonts are made up of multiple fonts and each
* substring that uses a particular component font needs to
* be separately sent to GDI.
* This works for standard composite fonts, alternate ones,
* Fonts that are a physical font backed by a standard composite,
* and with fallback fonts.
*/
CompositeFont compFont = (CompositeFont)font2D;
float userx = x, usery = y;
float devx = devpos.x, devy = devpos.y;
int start = 0, end = 0, slot = 0;
while (end < numGlyphs) {
start = end;
slot = glyphCodes[start] >>> 24;
while (end < numGlyphs && ((glyphCodes[end] >>> 24) == slot)) {
end++;
}
/* If we can't get the font, bail to outlines.
* But we should always be able to get all fonts for
* Composites, so this is unlikely, so any overstriking
* if only one slot is unavailable is not worth worrying
* about.
*/
PhysicalFont slotFont = compFont.getSlotFont(slot);
if (!(slotFont instanceof TrueTypeFont)) {
return false;
}
String family = slotFont.getFamilyName(null);
int style = font.getStyle() | slotFont.getStyle();
if (!wPrinterJob.setFont(family, scaledFontSizeY, style,
iangle, awScale)) {
return false;
}
int[] glyphs = Arrays.copyOfRange(glyphCodes, start, end);
float[] posns = Arrays.copyOfRange(glyphAdvPos,
start*2, end*2);
if (start != 0) {
Point2D.Float p =
new Point2D.Float(x+glyphPos[start*2],
y+glyphPos[start*2+1]);
deviceTransform.transform(p, p);
devx = p.x;
devy = p.y;
}
wPrinterJob.glyphsOut(glyphs, devx, devy, posns);
}
} else {
return false;
}
return true;
}
private void textOut(String str,
Font font, PhysicalFont font2D,
FontRenderContext frc,
float deviceSize, int rotation, float awScale,
double scaleFactorX, double scaleFactorY,
float userx, float usery,
float devx, float devy, float targetW) {
String family = font2D.getFamilyName(null);
int style = font.getStyle() | font2D.getStyle();
WPrinterJob wPrinterJob = (WPrinterJob)getPrinterJob();
boolean setFont = wPrinterJob.setFont(family, deviceSize, style,
rotation, awScale);
if (!setFont) {
super.drawString(str, userx, usery, font, frc, targetW);
return;
}
float[] glyphPos = null;
if (!okGDIMetrics(str, font, frc, scaleFactorX)) {
/* If there is a 1:1 char->glyph mapping then char positions
* are the same as glyph positions and we can tell GDI
* where to place the glyphs.
* On drawing we remove control chars so these need to be
* removed now so the string and positions are the same length.
* For other cases we need to pass glyph codes to GDI.
*/
str = wPrinterJob.removeControlChars(str);
char[] chars = str.toCharArray();
int len = chars.length;
GlyphVector gv = null;
if (!FontUtilities.isComplexText(chars, 0, len)) {
gv = font.createGlyphVector(frc, str);
}
if (gv == null) {
super.drawString(str, userx, usery, font, frc, targetW);
return;
}
glyphPos = gv.getGlyphPositions(0, len, null);
Point2D gvAdvPt = gv.getGlyphPosition(gv.getNumGlyphs());
/* GDI advances must not include device space rotation.
* See earlier comment in printGlyphVector() for details.
*/
AffineTransform advanceTransform =
AffineTransform.getScaleInstance(scaleFactorX, scaleFactorY);
float[] glyphAdvPos = new float[glyphPos.length];
advanceTransform.transform(glyphPos, 0, //source
glyphAdvPos, 0, //destination
glyphPos.length/2); //num points
glyphPos = glyphAdvPos;
}
wPrinterJob.textOut(str, devx, devy, glyphPos);
}
/* If 2D and GDI agree on the advance of the string we do not
* need to explicitly assign glyph positions.
* If we are to use the GDI advance, require it to agree with
* JDK to a precision of <= 1.0% - ie 1 pixel in 100
* discrepancy after rounding the 2D advance to the
* nearest pixel and is greater than one pixel in total.
* ie strings < 100 pixels in length will be OK so long
* as they differ by only 1 pixel even though that is > 1%
* The bounds from 2D are in user space so need to
* be scaled to device space for comparison with GDI.
* scaleX is the scale from user space to device space needed for this.
*/
private boolean okGDIMetrics(String str, Font font,
FontRenderContext frc, double scaleX) {
Rectangle2D bds = font.getStringBounds(str, frc);
double jdkAdvance = bds.getWidth();
jdkAdvance = Math.round(jdkAdvance*scaleX);
int gdiAdvance = ((WPrinterJob)getPrinterJob()).getGDIAdvance(str);
if (jdkAdvance > 0 && gdiAdvance > 0) {
double diff = Math.abs(gdiAdvance-jdkAdvance);
double ratio = gdiAdvance/jdkAdvance;
if (ratio < 1) {
ratio = 1/ratio;
}
return diff <= 1 || ratio < 1.01;
}
return true;
}
The various drawImage() methods for
WPathGraphics are all decomposed
into an invocation of drawImageToPlatform.
The portion of the passed in image defined by
srcX, srcY, srcWidth, and srcHeight
is transformed by the supplied AffineTransform and
drawn using GDI to the printer context.
Params: - img – The image to be drawn.
- xform – Used to transform the image before drawing.
This can be null.
- bgcolor – This color is drawn where the image has transparent
pixels. If this parameter is null then the
pixels already in the destination should show
through.
- srcX – With srcY this defines the upper-left corner
of the portion of the image to be drawn.
- srcY – With srcX this defines the upper-left corner
of the portion of the image to be drawn.
- srcWidth – The width of the portion of the image to
be drawn.
- srcHeight – The height of the portion of the image to
be drawn.
- handlingTransparency – if being recursively called to
print opaque region of transparent image
/**
* The various <code>drawImage()</code> methods for
* <code>WPathGraphics</code> are all decomposed
* into an invocation of <code>drawImageToPlatform</code>.
* The portion of the passed in image defined by
* <code>srcX, srcY, srcWidth, and srcHeight</code>
* is transformed by the supplied AffineTransform and
* drawn using GDI to the printer context.
*
* @param img The image to be drawn.
* @param xform Used to transform the image before drawing.
* This can be null.
* @param bgcolor This color is drawn where the image has transparent
* pixels. If this parameter is null then the
* pixels already in the destination should show
* through.
* @param srcX With srcY this defines the upper-left corner
* of the portion of the image to be drawn.
*
* @param srcY With srcX this defines the upper-left corner
* of the portion of the image to be drawn.
* @param srcWidth The width of the portion of the image to
* be drawn.
* @param srcHeight The height of the portion of the image to
* be drawn.
* @param handlingTransparency if being recursively called to
* print opaque region of transparent image
*/
@Override
protected boolean drawImageToPlatform(Image image, AffineTransform xform,
Color bgcolor,
int srcX, int srcY,
int srcWidth, int srcHeight,
boolean handlingTransparency) {
BufferedImage img = getBufferedImage(image);
if (img == null) {
return true;
}
WPrinterJob wPrinterJob = (WPrinterJob) getPrinterJob();
/* The full transform to be applied to the image is the
* caller's transform concatenated on to the transform
* from user space to device space. If the caller didn't
* supply a transform then we just act as if they passed
* in the identify transform.
*/
AffineTransform fullTransform = getTransform();
if (xform == null) {
xform = new AffineTransform();
}
fullTransform.concatenate(xform);
/* Split the full transform into a pair of
* transforms. The first transform holds effects
* that GDI (under Win95) can not perform such
* as rotation and shearing. The second transform
* is setup to hold only the scaling effects.
* These transforms are created such that a point,
* p, in user space, when transformed by 'fullTransform'
* lands in the same place as when it is transformed
* by 'rotTransform' and then 'scaleTransform'.
*
* The entire image transformation is not in Java in order
* to minimize the amount of memory needed in the VM. By
* dividing the transform in two, we rotate and shear
* the source image in its own space and only go to
* the, usually, larger, device space when we ask
* GDI to perform the final scaling.
* Clamp this to the device scale for better quality printing.
*/
double[] fullMatrix = new double[6];
fullTransform.getMatrix(fullMatrix);
/* Calculate the amount of scaling in the x
* and y directions. This scaling is computed by
* transforming a unit vector along each axis
* and computing the resulting magnitude.
* The computed values 'scaleX' and 'scaleY'
* represent the amount of scaling GDI will be asked
* to perform.
*/
Point2D.Float unitVectorX = new Point2D.Float(1, 0);
Point2D.Float unitVectorY = new Point2D.Float(0, 1);
fullTransform.deltaTransform(unitVectorX, unitVectorX);
fullTransform.deltaTransform(unitVectorY, unitVectorY);
Point2D.Float origin = new Point2D.Float(0, 0);
double scaleX = unitVectorX.distance(origin);
double scaleY = unitVectorY.distance(origin);
double devResX = wPrinterJob.getXRes();
double devResY = wPrinterJob.getYRes();
double devScaleX = devResX / DEFAULT_USER_RES;
double devScaleY = devResY / DEFAULT_USER_RES;
/* check if rotated or sheared */
int transformType = fullTransform.getType();
boolean clampScale = ((transformType &
(AffineTransform.TYPE_GENERAL_ROTATION |
AffineTransform.TYPE_GENERAL_TRANSFORM)) != 0);
if (clampScale) {
if (scaleX > devScaleX) scaleX = devScaleX;
if (scaleY > devScaleY) scaleY = devScaleY;
}
/* We do not need to draw anything if either scaling
* factor is zero.
*/
if (scaleX != 0 && scaleY != 0) {
/* Here's the transformation we will do with Java2D,
*/
AffineTransform rotTransform = new AffineTransform(
fullMatrix[0] / scaleX, //m00
fullMatrix[1] / scaleY, //m10
fullMatrix[2] / scaleX, //m01
fullMatrix[3] / scaleY, //m11
fullMatrix[4] / scaleX, //m02
fullMatrix[5] / scaleY); //m12
/* The scale transform is not used directly: we instead
* directly multiply by scaleX and scaleY.
*
* Conceptually here is what the scaleTransform is:
*
* AffineTransform scaleTransform = new AffineTransform(
* scaleX, //m00
* 0, //m10
* 0, //m01
* scaleY, //m11
* 0, //m02
* 0); //m12
*/
/* Convert the image source's rectangle into the rotated
* and sheared space. Once there, we calculate a rectangle
* that encloses the resulting shape. It is this rectangle
* which defines the size of the BufferedImage we need to
* create to hold the transformed image.
*/
Rectangle2D.Float srcRect = new Rectangle2D.Float(srcX, srcY,
srcWidth,
srcHeight);
Shape rotShape = rotTransform.createTransformedShape(srcRect);
Rectangle2D rotBounds = rotShape.getBounds2D();
/* add a fudge factor as some fp precision problems have
* been observed which caused pixels to be rounded down and
* out of the image.
*/
rotBounds.setRect(rotBounds.getX(), rotBounds.getY(),
rotBounds.getWidth()+0.001,
rotBounds.getHeight()+0.001);
int boundsWidth = (int) rotBounds.getWidth();
int boundsHeight = (int) rotBounds.getHeight();
if (boundsWidth > 0 && boundsHeight > 0) {
/* If the image has transparent or semi-transparent
* pixels then we'll have the application re-render
* the portion of the page covered by the image.
* The BufferedImage will be at the image's resolution
* to avoid wasting memory. By re-rendering this portion
* of a page all compositing is done by Java2D into
* the BufferedImage and then that image is copied to
* GDI.
* However several special cases can be handled otherwise:
* - bitmask transparency with a solid background colour
* - images which have transparency color models but no
* transparent pixels
* - images with bitmask transparency and an IndexColorModel
* (the common transparent GIF case) can be handled by
* rendering just the opaque pixels.
*/
boolean drawOpaque = true;
if (!handlingTransparency && hasTransparentPixels(img)) {
drawOpaque = false;
if (isBitmaskTransparency(img)) {
if (bgcolor == null) {
if (drawBitmaskImage(img, xform, bgcolor,
srcX, srcY,
srcWidth, srcHeight)) {
// image drawn, just return.
return true;
}
} else if (bgcolor.getTransparency()
== Transparency.OPAQUE) {
drawOpaque = true;
}
}
if (!canDoRedraws()) {
drawOpaque = true;
}
} else {
// if there's no transparent pixels there's no need
// for a background colour. This can avoid edge artifacts
// in rotation cases.
bgcolor = null;
}
// if src region extends beyond the image, the "opaque" path
// may blit b/g colour (including white) where it shoudn't.
if ((srcX+srcWidth > img.getWidth(null) ||
srcY+srcHeight > img.getHeight(null))
&& canDoRedraws()) {
drawOpaque = false;
}
if (drawOpaque == false) {
fullTransform.getMatrix(fullMatrix);
AffineTransform tx =
new AffineTransform(
fullMatrix[0] / devScaleX, //m00
fullMatrix[1] / devScaleY, //m10
fullMatrix[2] / devScaleX, //m01
fullMatrix[3] / devScaleY, //m11
fullMatrix[4] / devScaleX, //m02
fullMatrix[5] / devScaleY); //m12
Rectangle2D.Float rect =
new Rectangle2D.Float(srcX, srcY, srcWidth, srcHeight);
Shape shape = fullTransform.createTransformedShape(rect);
// Region isn't user space because its potentially
// been rotated for landscape.
Rectangle2D region = shape.getBounds2D();
region.setRect(region.getX(), region.getY(),
region.getWidth()+0.001,
region.getHeight()+0.001);
// Try to limit the amount of memory used to 8Mb, so
// if at device resolution this exceeds a certain
// image size then scale down the region to fit in
// that memory, but never to less than 72 dpi.
int w = (int)region.getWidth();
int h = (int)region.getHeight();
int nbytes = w * h * 3;
int maxBytes = 8 * 1024 * 1024;
double origDpi = (devResX < devResY) ? devResX : devResY;
int dpi = (int)origDpi;
double scaleFactor = 1;
double maxSFX = w/(double)boundsWidth;
double maxSFY = h/(double)boundsHeight;
double maxSF = (maxSFX > maxSFY) ? maxSFY : maxSFX;
int minDpi = (int)(dpi/maxSF);
if (minDpi < DEFAULT_USER_RES) minDpi = DEFAULT_USER_RES;
while (nbytes > maxBytes && dpi > minDpi) {
scaleFactor *= 2;
dpi /= 2;
nbytes /= 4;
}
if (dpi < minDpi) {
scaleFactor = (origDpi / minDpi);
}
region.setRect(region.getX()/scaleFactor,
region.getY()/scaleFactor,
region.getWidth()/scaleFactor,
region.getHeight()/scaleFactor);
/*
* We need to have the clip as part of the saved state,
* either directly, or all the components that are
* needed to reconstitute it (image source area,
* image transform and current graphics transform).
* The clip is described in user space, so we need to
* save the current graphics transform anyway so just
* save these two.
*/
wPrinterJob.saveState(getTransform(), getClip(),
region, scaleFactor, scaleFactor);
return true;
/* The image can be rendered directly by GDI so we
* copy it into a BufferedImage (this takes care of
* ColorSpace and BufferedImageOp issues) and then
* send that to GDI.
*/
} else {
/* Create a buffered image big enough to hold the portion
* of the source image being printed.
* The image format will be 3BYTE_BGR for most cases
* except where we can represent the image as a 1, 4 or 8
* bits-per-pixel DIB.
*/
int dibType = BufferedImage.TYPE_3BYTE_BGR;
IndexColorModel icm = null;
ColorModel cm = img.getColorModel();
int imgType = img.getType();
if (cm instanceof IndexColorModel &&
cm.getPixelSize() <= 8 &&
(imgType == BufferedImage.TYPE_BYTE_BINARY ||
imgType == BufferedImage.TYPE_BYTE_INDEXED)) {
icm = (IndexColorModel)cm;
dibType = imgType;
/* BYTE_BINARY may be 2 bpp which DIB can't handle.
* Convert this to 4bpp.
*/
if (imgType == BufferedImage.TYPE_BYTE_BINARY &&
cm.getPixelSize() == 2) {
int[] rgbs = new int[16];
icm.getRGBs(rgbs);
boolean transparent =
icm.getTransparency() != Transparency.OPAQUE;
int transpixel = icm.getTransparentPixel();
icm = new IndexColorModel(4, 16,
rgbs, 0,
transparent, transpixel,
DataBuffer.TYPE_BYTE);
}
}
int iw = (int)rotBounds.getWidth();
int ih = (int)rotBounds.getHeight();
BufferedImage deepImage = null;
/* If there is no special transform needed (this is a
* simple BLIT) and dibType == img.getType() and we
* didn't create a new IndexColorModel AND the whole of
* the source image is being drawn (GDI can't handle a
* portion of the original source image) then we
* don't need to create this intermediate image - GDI
* can access the data from the original image.
* Since a subimage can be created by calling
* BufferedImage.getSubImage() that condition needs to
* be accounted for too. This implies inspecting the
* data buffer. In the end too many cases are not able
* to take advantage of this option until we can teach
* the native code to properly navigate the data buffer.
* There was a concern that since in native code since we
* need to DWORD align and flip to a bottom up DIB that
* the "original" image may get perturbed by this.
* But in fact we always malloc new memory for the aligned
* copy so this isn't a problem.
* This points out that we allocate two temporaries copies
* of the image : one in Java and one in native. If
* we can be smarter about not allocating this one when
* not needed, that would seem like a good thing to do,
* even if in many cases the ColorModels don't match and
* its needed.
* Until all of this is resolved newImage is always true.
*/
boolean newImage = true;
if (newImage) {
if (icm == null) {
deepImage = new BufferedImage(iw, ih, dibType);
} else {
deepImage = new BufferedImage(iw, ih, dibType,icm);
}
/* Setup a Graphics2D on to the BufferedImage so that
* the source image when copied, lands within the
* image buffer.
*/
Graphics2D imageGraphics = deepImage.createGraphics();
imageGraphics.clipRect(0, 0,
deepImage.getWidth(),
deepImage.getHeight());
imageGraphics.translate(-rotBounds.getX(),
-rotBounds.getY());
imageGraphics.transform(rotTransform);
/* Fill the BufferedImage either with the caller
* supplied color, 'bgColor' or, if null, with white.
*/
if (bgcolor == null) {
bgcolor = Color.white;
}
imageGraphics.drawImage(img,
srcX, srcY,
srcX + srcWidth,
srcY + srcHeight,
srcX, srcY,
srcX + srcWidth,
srcY + srcHeight,
bgcolor, null);
imageGraphics.dispose();
} else {
deepImage = img;
}
/* Scale the bounding rectangle by the scale transform.
* Because the scaling transform has only x and y
* scaling components it is equivalent to multiply
* the x components of the bounding rectangle by
* the x scaling factor and to multiply the y components
* by the y scaling factor.
*/
Rectangle2D.Float scaledBounds
= new Rectangle2D.Float(
(float) (rotBounds.getX() * scaleX),
(float) (rotBounds.getY() * scaleY),
(float) (rotBounds.getWidth() * scaleX),
(float) (rotBounds.getHeight() * scaleY));
/* Pull the raster data from the buffered image
* and pass it along to GDI.
*/
WritableRaster raster = deepImage.getRaster();
byte[] data;
if (raster instanceof ByteComponentRaster) {
data = ((ByteComponentRaster)raster).getDataStorage();
} else if (raster instanceof BytePackedRaster) {
data = ((BytePackedRaster)raster).getDataStorage();
} else {
return false;
}
int bitsPerPixel = 24;
SampleModel sm = deepImage.getSampleModel();
if (sm instanceof ComponentSampleModel) {
ComponentSampleModel csm = (ComponentSampleModel)sm;
bitsPerPixel = csm.getPixelStride() * 8;
} else if (sm instanceof MultiPixelPackedSampleModel) {
MultiPixelPackedSampleModel mppsm =
(MultiPixelPackedSampleModel)sm;
bitsPerPixel = mppsm.getPixelBitStride();
} else {
if (icm != null) {
int diw = deepImage.getWidth();
int dih = deepImage.getHeight();
if (diw > 0 && dih > 0) {
bitsPerPixel = data.length*8/diw/dih;
}
}
}
/* Because the caller's image has been rotated
* and sheared into our BufferedImage and because
* we will be handing that BufferedImage directly to
* GDI, we need to set an additional clip. This clip
* makes sure that only parts of the BufferedImage
* that are also part of the caller's image are drawn.
*/
Shape holdClip = getClip();
clip(xform.createTransformedShape(srcRect));
deviceClip(getClip().getPathIterator(getTransform()));
wPrinterJob.drawDIBImage
(data, scaledBounds.x, scaledBounds.y,
(float)Math.rint(scaledBounds.width+0.5),
(float)Math.rint(scaledBounds.height+0.5),
0f, 0f,
deepImage.getWidth(), deepImage.getHeight(),
bitsPerPixel, icm);
setClip(holdClip);
}
}
}
return true;
}
Have the printing application redraw everything that falls
within the page bounds defined by region.
/**
* Have the printing application redraw everything that falls
* within the page bounds defined by <code>region</code>.
*/
@Override
public void redrawRegion(Rectangle2D region, double scaleX, double scaleY,
Shape savedClip, AffineTransform savedTransform)
throws PrinterException {
WPrinterJob wPrinterJob = (WPrinterJob)getPrinterJob();
Printable painter = getPrintable();
PageFormat pageFormat = getPageFormat();
int pageIndex = getPageIndex();
/* Create a buffered image big enough to hold the portion
* of the source image being printed.
*/
BufferedImage deepImage = new BufferedImage(
(int) region.getWidth(),
(int) region.getHeight(),
BufferedImage.TYPE_3BYTE_BGR);
/* Get a graphics for the application to render into.
* We initialize the buffer to white in order to
* match the paper and then we shift the BufferedImage
* so that it covers the area on the page where the
* caller's Image will be drawn.
*/
Graphics2D g = deepImage.createGraphics();
ProxyGraphics2D proxy = new ProxyGraphics2D(g, wPrinterJob);
proxy.setColor(Color.white);
proxy.fillRect(0, 0, deepImage.getWidth(), deepImage.getHeight());
proxy.clipRect(0, 0, deepImage.getWidth(), deepImage.getHeight());
proxy.translate(-region.getX(), -region.getY());
/* Calculate the resolution of the source image.
*/
float sourceResX = (float)(wPrinterJob.getXRes() / scaleX);
float sourceResY = (float)(wPrinterJob.getYRes() / scaleY);
/* The application expects to see user space at 72 dpi.
* so change user space from image source resolution to
* 72 dpi.
*/
proxy.scale(sourceResX / DEFAULT_USER_RES,
sourceResY / DEFAULT_USER_RES);
proxy.translate(
-wPrinterJob.getPhysicalPrintableX(pageFormat.getPaper())
/ wPrinterJob.getXRes() * DEFAULT_USER_RES,
-wPrinterJob.getPhysicalPrintableY(pageFormat.getPaper())
/ wPrinterJob.getYRes() * DEFAULT_USER_RES);
/* NB User space now has to be at 72 dpi for this calc to be correct */
proxy.transform(new AffineTransform(getPageFormat().getMatrix()));
proxy.setPaint(Color.black);
painter.print(proxy, pageFormat, pageIndex);
g.dispose();
/* We need to set the device clip using saved information.
* savedClip intersects the user clip with a clip that restricts
* the GDI rendered area of our BufferedImage to that which
* may correspond to a rotate or shear.
* The saved device transform is needed as the current transform
* is not likely to be the same.
*/
if (savedClip != null) {
deviceClip(savedClip.getPathIterator(savedTransform));
}
/* Scale the bounding rectangle by the scale transform.
* Because the scaling transform has only x and y
* scaling components it is equivalent to multiplying
* the x components of the bounding rectangle by
* the x scaling factor and to multiplying the y components
* by the y scaling factor.
*/
Rectangle2D.Float scaledBounds
= new Rectangle2D.Float(
(float) (region.getX() * scaleX),
(float) (region.getY() * scaleY),
(float) (region.getWidth() * scaleX),
(float) (region.getHeight() * scaleY));
/* Pull the raster data from the buffered image
* and pass it along to GDI.
*/
ByteComponentRaster tile
= (ByteComponentRaster)deepImage.getRaster();
wPrinterJob.drawImage3ByteBGR(tile.getDataStorage(),
scaledBounds.x, scaledBounds.y,
scaledBounds.width,
scaledBounds.height,
0f, 0f,
deepImage.getWidth(), deepImage.getHeight());
}
/*
* Fill the path defined by <code>pathIter</code>
* with the specified color.
* The path is provided in device coordinates.
*/
@Override
protected void deviceFill(PathIterator pathIter, Color color) {
WPrinterJob wPrinterJob = (WPrinterJob) getPrinterJob();
convertToWPath(pathIter);
wPrinterJob.selectSolidBrush(color);
wPrinterJob.fillPath();
}
/*
* Set the printer device's clip to be the
* path defined by <code>pathIter</code>
* The path is provided in device coordinates.
*/
@Override
protected void deviceClip(PathIterator pathIter) {
WPrinterJob wPrinterJob = (WPrinterJob) getPrinterJob();
convertToWPath(pathIter);
wPrinterJob.selectClipPath();
}
Draw the bounding rectangle using transformed coordinates.
/**
* Draw the bounding rectangle using transformed coordinates.
*/
@Override
protected void deviceFrameRect(int x, int y, int width, int height,
Color color) {
AffineTransform deviceTransform = getTransform();
/* check if rotated or sheared */
int transformType = deviceTransform.getType();
boolean usePath = ((transformType &
(AffineTransform.TYPE_GENERAL_ROTATION |
AffineTransform.TYPE_GENERAL_TRANSFORM)) != 0);
if (usePath) {
draw(new Rectangle2D.Float(x, y, width, height));
return;
}
Stroke stroke = getStroke();
if (stroke instanceof BasicStroke) {
BasicStroke lineStroke = (BasicStroke) stroke;
int endCap = lineStroke.getEndCap();
int lineJoin = lineStroke.getLineJoin();
/* check for default style and try to optimize it by
* calling the frameRect native function instead of using paths.
*/
if ((endCap == BasicStroke.CAP_SQUARE) &&
(lineJoin == BasicStroke.JOIN_MITER) &&
(lineStroke.getMiterLimit() ==10.0f)) {
float lineWidth = lineStroke.getLineWidth();
Point2D.Float penSize = new Point2D.Float(lineWidth,
lineWidth);
deviceTransform.deltaTransform(penSize, penSize);
float deviceLineWidth = Math.min(Math.abs(penSize.x),
Math.abs(penSize.y));
/* transform upper left coordinate */
Point2D.Float ul_pos = new Point2D.Float(x, y);
deviceTransform.transform(ul_pos, ul_pos);
/* transform lower right coordinate */
Point2D.Float lr_pos = new Point2D.Float(x + width,
y + height);
deviceTransform.transform(lr_pos, lr_pos);
float w = (float) (lr_pos.getX() - ul_pos.getX());
float h = (float)(lr_pos.getY() - ul_pos.getY());
WPrinterJob wPrinterJob = (WPrinterJob) getPrinterJob();
/* use selectStylePen, if supported */
if (wPrinterJob.selectStylePen(endCap, lineJoin,
deviceLineWidth, color) == true) {
wPrinterJob.frameRect((float)ul_pos.getX(),
(float)ul_pos.getY(), w, h);
}
/* not supported, must be a Win 9x */
else {
double lowerRes = Math.min(wPrinterJob.getXRes(),
wPrinterJob.getYRes());
if ((deviceLineWidth/lowerRes) < MAX_THINLINE_INCHES) {
/* use the default pen styles for thin pens. */
wPrinterJob.selectPen(deviceLineWidth, color);
wPrinterJob.frameRect((float)ul_pos.getX(),
(float)ul_pos.getY(), w, h);
}
else {
draw(new Rectangle2D.Float(x, y, width, height));
}
}
}
else {
draw(new Rectangle2D.Float(x, y, width, height));
}
}
}
/*
* Fill the rectangle with specified color and using Windows'
* GDI fillRect function.
* Boundaries are determined by the given coordinates.
*/
@Override
protected void deviceFillRect(int x, int y, int width, int height,
Color color) {
/*
* Transform to device coordinates
*/
AffineTransform deviceTransform = getTransform();
/* check if rotated or sheared */
int transformType = deviceTransform.getType();
boolean usePath = ((transformType &
(AffineTransform.TYPE_GENERAL_ROTATION |
AffineTransform.TYPE_GENERAL_TRANSFORM)) != 0);
if (usePath) {
fill(new Rectangle2D.Float(x, y, width, height));
return;
}
Point2D.Float tlc_pos = new Point2D.Float(x, y);
deviceTransform.transform(tlc_pos, tlc_pos);
Point2D.Float brc_pos = new Point2D.Float(x+width, y+height);
deviceTransform.transform(brc_pos, brc_pos);
float deviceWidth = (float) (brc_pos.getX() - tlc_pos.getX());
float deviceHeight = (float)(brc_pos.getY() - tlc_pos.getY());
WPrinterJob wPrinterJob = (WPrinterJob) getPrinterJob();
wPrinterJob.fillRect((float)tlc_pos.getX(), (float)tlc_pos.getY(),
deviceWidth, deviceHeight, color);
}
Draw a line using a pen created using the specified color
and current stroke properties.
/**
* Draw a line using a pen created using the specified color
* and current stroke properties.
*/
@Override
protected void deviceDrawLine(int xBegin, int yBegin, int xEnd, int yEnd,
Color color) {
Stroke stroke = getStroke();
if (stroke instanceof BasicStroke) {
BasicStroke lineStroke = (BasicStroke) stroke;
if (lineStroke.getDashArray() != null) {
draw(new Line2D.Float(xBegin, yBegin, xEnd, yEnd));
return;
}
float lineWidth = lineStroke.getLineWidth();
Point2D.Float penSize = new Point2D.Float(lineWidth, lineWidth);
AffineTransform deviceTransform = getTransform();
deviceTransform.deltaTransform(penSize, penSize);
float deviceLineWidth = Math.min(Math.abs(penSize.x),
Math.abs(penSize.y));
Point2D.Float begin_pos = new Point2D.Float(xBegin, yBegin);
deviceTransform.transform(begin_pos, begin_pos);
Point2D.Float end_pos = new Point2D.Float(xEnd, yEnd);
deviceTransform.transform(end_pos, end_pos);
int endCap = lineStroke.getEndCap();
int lineJoin = lineStroke.getLineJoin();
/* check if it's a one-pixel line */
if ((end_pos.getX() == begin_pos.getX())
&& (end_pos.getY() == begin_pos.getY())) {
/* endCap other than Round will not print!
* due to Windows GDI limitation, force it to CAP_ROUND
*/
endCap = BasicStroke.CAP_ROUND;
}
WPrinterJob wPrinterJob = (WPrinterJob) getPrinterJob();
/* call native function that creates pen with style */
if (wPrinterJob.selectStylePen(endCap, lineJoin,
deviceLineWidth, color)) {
wPrinterJob.moveTo((float)begin_pos.getX(),
(float)begin_pos.getY());
wPrinterJob.lineTo((float)end_pos.getX(),
(float)end_pos.getY());
}
/* selectStylePen is not supported, must be Win 9X */
else {
/* let's see if we can use a a default pen
* if it's round end (Windows' default style)
* or it's vertical/horizontal
* or stroke is too thin.
*/
double lowerRes = Math.min(wPrinterJob.getXRes(),
wPrinterJob.getYRes());
if ((endCap == BasicStroke.CAP_ROUND) ||
(((xBegin == xEnd) || (yBegin == yEnd)) &&
(deviceLineWidth/lowerRes < MAX_THINLINE_INCHES))) {
wPrinterJob.selectPen(deviceLineWidth, color);
wPrinterJob.moveTo((float)begin_pos.getX(),
(float)begin_pos.getY());
wPrinterJob.lineTo((float)end_pos.getX(),
(float)end_pos.getY());
}
else {
draw(new Line2D.Float(xBegin, yBegin, xEnd, yEnd));
}
}
}
}
Given a Java2D PathIterator instance,
this method translates that into a Window's path
in the printer device context.
/**
* Given a Java2D <code>PathIterator</code> instance,
* this method translates that into a Window's path
* in the printer device context.
*/
private void convertToWPath(PathIterator pathIter) {
float[] segment = new float[6];
int segmentType;
WPrinterJob wPrinterJob = (WPrinterJob) getPrinterJob();
/* Map the PathIterator's fill rule into the Window's
* polygon fill rule.
*/
int polyFillRule;
if (pathIter.getWindingRule() == PathIterator.WIND_EVEN_ODD) {
polyFillRule = WPrinterJob.POLYFILL_ALTERNATE;
} else {
polyFillRule = WPrinterJob.POLYFILL_WINDING;
}
wPrinterJob.setPolyFillMode(polyFillRule);
wPrinterJob.beginPath();
while (pathIter.isDone() == false) {
segmentType = pathIter.currentSegment(segment);
switch (segmentType) {
case PathIterator.SEG_MOVETO:
wPrinterJob.moveTo(segment[0], segment[1]);
break;
case PathIterator.SEG_LINETO:
wPrinterJob.lineTo(segment[0], segment[1]);
break;
/* Convert the quad path to a bezier.
*/
case PathIterator.SEG_QUADTO:
int lastX = wPrinterJob.getPenX();
int lastY = wPrinterJob.getPenY();
float c1x = lastX + (segment[0] - lastX) * 2 / 3;
float c1y = lastY + (segment[1] - lastY) * 2 / 3;
float c2x = segment[2] - (segment[2] - segment[0]) * 2/ 3;
float c2y = segment[3] - (segment[3] - segment[1]) * 2/ 3;
wPrinterJob.polyBezierTo(c1x, c1y,
c2x, c2y,
segment[2], segment[3]);
break;
case PathIterator.SEG_CUBICTO:
wPrinterJob.polyBezierTo(segment[0], segment[1],
segment[2], segment[3],
segment[4], segment[5]);
break;
case PathIterator.SEG_CLOSE:
wPrinterJob.closeFigure();
break;
}
pathIter.next();
}
wPrinterJob.endPath();
}
}