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third-party-mirror/openjdk/jdk25u/HEAD/./src/java.desktop/share/classes/sun/font/StandardGlyphVector.java
blob: e333a9de29173221c29d8f508558f96247a24226 [file]
/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* published by the Free Software Foundation. Oracle designates this
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* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* accompanied this code).
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package sun.font;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.Rectangle;
import static java.awt.RenderingHints.*;
import java.awt.Shape;
import java.awt.font.FontRenderContext;
import java.awt.font.GlyphMetrics;
import java.awt.font.GlyphJustificationInfo;
import java.awt.font.GlyphVector;
import java.awt.font.LineMetrics;
import java.awt.font.TextAttribute;
import java.awt.geom.AffineTransform;
import java.awt.geom.GeneralPath;
import java.awt.geom.NoninvertibleTransformException;
import java.awt.geom.PathIterator;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.lang.ref.SoftReference;
import java.text.CharacterIterator;
import sun.awt.SunHints;
import sun.java2d.loops.FontInfo;
/**
* Standard implementation of GlyphVector used by Font, GlyphList, and
* SunGraphics2D.
*
* The main issues involve the semantics of the various transforms
* (font, glyph, device) and their effect on rendering and metrics.
*
* Very, very unfortunately, the translation component of the font
* transform affects where the text gets rendered. It offsets the
* rendering origin. None of the other metrics of the glyphvector
* are affected, making them inconsistent with the rendering behavior.
* I think the translation component of the font would be better
* interpreted as the translation component of a per-glyph transform,
* but I don't know if this is possible to change.
*
* After the font transform is applied, the glyph transform is
* applied. This makes glyph transforms relative to font transforms,
* if the font transform changes, the glyph transform will have the
* same (relative) effect on the outline of the glyph. The outline
* and logical bounds are passed through the glyph transform before
* being returned. The glyph metrics ignore the glyph transform, but
* provide the outline bounds and the advance vector of the glyph (the
* latter will be rotated if the font is rotated). The default layout
* places each glyph at the end of the advance vector of the previous
* glyph, and since the glyph transform translates the advance vector,
* this means a glyph transform affects the positions of all
* subsequent glyphs if defaultLayout is called after setting a glyph
* transform. In the glyph info array, the bounds are the outline
* bounds including the glyph transform, and the positions are as
* computed, and the advances are the deltas between the positions.
*
* (There's a bug in the logical bounds of a rotated glyph for
* composite fonts, it's not to spec (in 1.4.0, 1.4.1, 1.4.2). The
* problem is that the rotated composite doesn't handle the multiple
* ascents and descents properly in both x and y. You end up with
* a rotated advance vector but an unrotated ascent and descent.)
*
* Finally, the whole thing is transformed by the device transform to
* position it on the page.
*
* Another bug: The glyph outline seems to ignore fractional point
* size information, but the images (and advances) don't ignore it.
*
* Small fonts drawn at large magnification have odd advances when
* fractional metrics is off-- that's because the advances depend on
* the frc. When the frc is scaled appropriately, the advances are
* fine. FM or a large frc (high numbers) make the advances right.
*
* The buffer aa flag doesn't affect rendering, the glyph vector
* renders as AA if aa is set in its frc, and as non-aa if aa is not
* set in its frc.
*
* font rotation, baseline, vertical etc.
*
* Font rotation and baseline Line metrics should be measured along a
* unit vector pi/4 cc from the baseline vector. For 'horizontal'
* fonts the baseline vector is the x vector passed through the font
* transform (ignoring translation), for 'vertical' it is the y
* vector. This definition makes ascent, descent, etc independent of
* shear, so shearing can be used to simulate italic. This means no
* fonts have 'negative ascents' or 'zero ascents' etc.
*
* Having a coordinate system with orthogonal axes where one is
* parallel to the baseline means we could use rectangles and interpret
* them in terms of this coordinate system. Unfortunately there
* is support for rotated fonts in the jdk already so maintaining
* the semantics of existing code (getlogical bounds, etc) might
* be difficult.
*
* A font transform transforms both the baseline and all the glyphs
* in the font, so it does not rotate the glyph w.r.t the baseline.
* If you do want to rotate individual glyphs, you need to apply a
* glyph transform. If performDefaultLayout is called after this,
* the transformed glyph advances will affect the glyph positions.
*
* useful additions
* - select vertical metrics - glyphs are rotated pi/4 cc and vertical
* metrics are used to align them to the baseline.
* - define baseline for font (glyph rotation not linked to baseline)
* - define extra space (delta between each glyph along baseline)
* - define offset (delta from 'true' baseline, impacts ascent and
* descent as these are still computed from true basline and pinned
* to zero, used in superscript).
*/
public class StandardGlyphVector extends GlyphVector {
private Font font;
private FontRenderContext frc;
private int[] glyphs; // always
private int[] userGlyphs; // used to return glyphs to the client.
private float[] positions; // only if not default advances
private int[] charIndices; // only if interesting
private int flags; // indicates whether positions, charIndices is interesting
private static final int UNINITIALIZED_FLAGS = -1;
// transforms information
private GlyphTransformInfo gti; // information about per-glyph transforms
// !!! can we get rid of any of this extra stuff?
private AffineTransform ftx; // font transform without translation
private AffineTransform dtx; // device transform used for strike calculations, no translation
private AffineTransform invdtx; // inverse of dtx or null if dtx is identity
private AffineTransform frctx; // font render context transform, wish we could just share it
private Font2D font2D; // basic strike-independent stuff
private SoftReference<GlyphStrike> fsref; // font strike reference for glyphs with no per-glyph transform
/////////////////////////////
// Constructors and Factory methods
/////////////////////////////
public StandardGlyphVector(Font font, String str, FontRenderContext frc) {
init(font, str.toCharArray(), 0, str.length(), frc, UNINITIALIZED_FLAGS);
}
public StandardGlyphVector(Font font, char[] text, FontRenderContext frc) {
init(font, text, 0, text.length, frc, UNINITIALIZED_FLAGS);
}
public StandardGlyphVector(Font font, char[] text, int start, int count,
FontRenderContext frc) {
init(font, text, start, count, frc, UNINITIALIZED_FLAGS);
}
private float getTracking(Font font) {
if (font.hasLayoutAttributes()) {
AttributeValues values = ((AttributeMap)font.getAttributes()).getValues();
return values.getTracking();
}
return 0;
}
// used by GlyphLayout to construct a glyphvector
public StandardGlyphVector(Font font, FontRenderContext frc, int[] glyphs, float[] positions,
int[] indices, int flags) {
initGlyphVector(font, frc, glyphs, positions, indices, flags);
// this code should go into layout
float track = getTracking(font);
if (track != 0) {
track *= font.getSize2D();
Point2D.Float trackPt = new Point2D.Float(track, 0); // advance delta
if (font.isTransformed()) {
AffineTransform at = font.getTransform();
at.deltaTransform(trackPt, trackPt);
}
// how do we know its a base glyph
// for now, it is if the natural advance of the glyph is non-zero
float[] deltas = { trackPt.x, trackPt.y };
for (int j = 0; j < deltas.length; ++j) {
float inc = deltas[j];
float prevPos = 0;
if (inc != 0) {
float delta = 0;
for (int i = j; i < positions.length; i += 2) {
if (i == j || prevPos != positions[i]) {
prevPos = positions[i];
positions[i] += delta;
delta += inc;
} else if (prevPos == positions[i]) {
positions[i] = positions[i - 2];
}
}
}
}
}
}
public void initGlyphVector(Font font, FontRenderContext frc, int[] glyphs, float[] positions,
int[] indices, int flags) {
this.font = font;
this.frc = frc;
this.glyphs = glyphs;
this.userGlyphs = glyphs; // no need to check
this.positions = positions;
this.charIndices = indices;
this.flags = flags;
initFontData();
}
public StandardGlyphVector(Font font, CharacterIterator iter, FontRenderContext frc) {
int offset = iter.getBeginIndex();
char[] text = new char [iter.getEndIndex() - offset];
for(char c = iter.first();
c != CharacterIterator.DONE;
c = iter.next()) {
text[iter.getIndex() - offset] = c;
}
init(font, text, 0, text.length, frc, UNINITIALIZED_FLAGS);
}
public StandardGlyphVector(Font font, int[] glyphs, FontRenderContext frc) {
// !!! find callers of this
// should be able to fully init from raw data, e.g. charmap, flags too.
this.font = font;
this.frc = frc;
this.flags = UNINITIALIZED_FLAGS;
initFontData();
this.userGlyphs = glyphs;
this.glyphs = getValidatedGlyphs(this.userGlyphs);
}
/* This is called from the rendering loop. FontInfo is supplied
* because a GV caches a strike and glyph images suitable for its FRC.
* LCD text isn't currently supported on all surfaces, in which case
* standard AA must be used. This is most likely to occur when LCD text
* is requested and the surface is some non-standard type or hardware
* surface for which there are no accelerated loops.
* We can detect this as being AA=="ON" in the FontInfo and AA!="ON"
* and AA!="GASP" in the FRC - since this only occurs for LCD text we don't
* need to check any more precisely what value is in the FRC.
*/
public static StandardGlyphVector getStandardGV(GlyphVector gv,
FontInfo info) {
if (info.aaHint == SunHints.INTVAL_TEXT_ANTIALIAS_ON) {
Object aaHint = gv.getFontRenderContext().getAntiAliasingHint();
if (aaHint != VALUE_TEXT_ANTIALIAS_ON &&
aaHint != VALUE_TEXT_ANTIALIAS_GASP) {
/* We need to create a new GV with AA==ON for rendering */
FontRenderContext frc = gv.getFontRenderContext();
frc = new FontRenderContext(frc.getTransform(),
VALUE_TEXT_ANTIALIAS_ON,
frc.getFractionalMetricsHint());
return new StandardGlyphVector(gv, frc);
}
}
if (gv instanceof StandardGlyphVector) {
return (StandardGlyphVector)gv;
}
return new StandardGlyphVector(gv, gv.getFontRenderContext());
}
/////////////////////////////
// GlyphVector API
/////////////////////////////
public Font getFont() {
return this.font;
}
public FontRenderContext getFontRenderContext() {
return this.frc;
}
public void performDefaultLayout() {
positions = null;
if (getTracking(font) == 0) {
clearFlags(FLAG_HAS_POSITION_ADJUSTMENTS);
}
}
public int getNumGlyphs() {
return glyphs.length;
}
public int getGlyphCode(int glyphIndex) {
return userGlyphs[glyphIndex];
}
public int[] getGlyphCodes(int start, int count, int[] result) {
if (count < 0) {
throw new IllegalArgumentException("count = " + count);
}
if (start < 0) {
throw new IndexOutOfBoundsException("start = " + start);
}
if (start > glyphs.length - count) { // watch out for overflow if index + count overlarge
throw new IndexOutOfBoundsException("start + count = " + (start + count));
}
if (result == null) {
result = new int[count];
}
// if arraycopy were faster, we wouldn't code this
for (int i = 0; i < count; ++i) {
result[i] = userGlyphs[i + start];
}
return result;
}
public int getGlyphCharIndex(int ix) {
if (ix < 0 && ix >= glyphs.length) {
throw new IndexOutOfBoundsException("" + ix);
}
if (charIndices == null) {
if ((getLayoutFlags() & FLAG_RUN_RTL) != 0) {
return glyphs.length - 1 - ix;
}
return ix;
}
return charIndices[ix];
}
public int[] getGlyphCharIndices(int start, int count, int[] result) {
if (start < 0 || count < 0 || (count > glyphs.length - start)) {
throw new IndexOutOfBoundsException("" + start + ", " + count);
}
if (result == null) {
result = new int[count];
}
if (charIndices == null) {
if ((getLayoutFlags() & FLAG_RUN_RTL) != 0) {
for (int i = 0, n = glyphs.length - 1 - start;
i < count; ++i, --n) {
result[i] = n;
}
} else {
for (int i = 0, n = start; i < count; ++i, ++n) {
result[i] = n;
}
}
} else {
for (int i = 0; i < count; ++i) {
result[i] = charIndices[i + start];
}
}
return result;
}
// !!! not cached, assume TextLayout will cache if necessary
// !!! reexamine for per-glyph-transforms
// !!! revisit for text-on-a-path, vertical
public Rectangle2D getLogicalBounds() {
setFRCTX();
initPositions();
LineMetrics lm = font.getLineMetrics("", frc);
float minX, minY, maxX, maxY;
// horiz only for now...
minX = 0;
minY = -lm.getAscent();
maxX = 0;
maxY = lm.getDescent() + lm.getLeading();
if (glyphs.length > 0) {
maxX = positions[positions.length - 2];
}
return new Rectangle2D.Float(minX, minY, maxX - minX, maxY - minY);
}
// !!! not cached, assume TextLayout will cache if necessary
public Rectangle2D getVisualBounds() {
Rectangle2D result = null;
for (int i = 0; i < glyphs.length; ++i) {
Rectangle2D glyphVB = getGlyphVisualBounds(i).getBounds2D();
if (!glyphVB.isEmpty()) {
if (result == null) {
result = glyphVB;
} else {
Rectangle2D.union(result, glyphVB, result);
}
}
}
if (result == null) {
result = new Rectangle2D.Float(0, 0, 0, 0);
}
return result;
}
// !!! not cached, assume TextLayout will cache if necessary
// !!! fontStrike needs a method for this
public Rectangle getPixelBounds(FontRenderContext renderFRC, float x, float y) {
return getGlyphsPixelBounds(renderFRC, x, y, 0, glyphs.length);
}
public Shape getOutline() {
return getGlyphsOutline(0, glyphs.length, 0, 0);
}
public Shape getOutline(float x, float y) {
return getGlyphsOutline(0, glyphs.length, x, y);
}
// relative to gv origin
public Shape getGlyphOutline(int ix) {
return getGlyphsOutline(ix, 1, 0, 0);
}
// relative to gv origin offset by x, y
public Shape getGlyphOutline(int ix, float x, float y) {
return getGlyphsOutline(ix, 1, x, y);
}
public Point2D getGlyphPosition(int ix) {
initPositions();
ix *= 2;
return new Point2D.Float(positions[ix], positions[ix + 1]);
}
public void setGlyphPosition(int ix, Point2D pos) {
if (ix < 0 || ix > glyphs.length) {
throw new IndexOutOfBoundsException("ix = " + ix);
}
initPositions();
int ix2 = ix << 1;
positions[ix2] = (float)pos.getX();
positions[ix2 + 1] = (float)pos.getY();
if (ix < glyphs.length) {
clearCaches(ix);
}
addFlags(FLAG_HAS_POSITION_ADJUSTMENTS);
}
public AffineTransform getGlyphTransform(int ix) {
if (ix < 0 || ix >= glyphs.length) {
throw new IndexOutOfBoundsException("ix = " + ix);
}
if (gti != null) {
return gti.getGlyphTransform(ix);
}
return null; // spec'd as returning null
}
public void setGlyphTransform(int ix, AffineTransform newTX) {
if (ix < 0 || ix >= glyphs.length) {
throw new IndexOutOfBoundsException("ix = " + ix);
}
if (gti == null) {
if (newTX == null || newTX.isIdentity()) {
return;
}
gti = new GlyphTransformInfo(this);
}
gti.setGlyphTransform(ix, newTX); // sets flags
if (gti.transformCount() == 0) {
gti = null;
}
}
public int getLayoutFlags() {
if (flags == UNINITIALIZED_FLAGS) {
flags = 0;
if (charIndices != null && glyphs.length > 1) {
boolean ltr = true;
boolean rtl = true;
int rtlix = charIndices.length; // rtl index
for (int i = 0; i < charIndices.length && (ltr || rtl); ++i) {
int cx = charIndices[i];
ltr = ltr && (cx == i);
rtl = rtl && (cx == --rtlix);
}
if (rtl) flags |= FLAG_RUN_RTL;
if (!rtl && !ltr) flags |= FLAG_COMPLEX_GLYPHS;
}
}
return flags;
}
public float[] getGlyphPositions(int start, int count, float[] result) {
if (count < 0) {
throw new IllegalArgumentException("count = " + count);
}
if (start < 0) {
throw new IndexOutOfBoundsException("start = " + start);
}
if (start > glyphs.length + 1 - count) { // watch for overflow
throw new IndexOutOfBoundsException("start + count = " + (start + count));
}
return internalGetGlyphPositions(start, count, 0, result);
}
public Shape getGlyphLogicalBounds(int ix) {
if (ix < 0 || ix >= glyphs.length) {
throw new IndexOutOfBoundsException("ix = " + ix);
}
Shape[] lbcache;
if (lbcacheRef == null || (lbcache = lbcacheRef.get()) == null) {
lbcache = new Shape[glyphs.length];
lbcacheRef = new SoftReference<>(lbcache);
}
Shape result = lbcache[ix];
if (result == null) {
setFRCTX();
initPositions();
// !!! ought to return a rectangle2d for simple cases, though the following works for all
// get the position, the tx offset, and the x,y advance and x,y adl. The
// shape is the box formed by adv (width) and adl (height) offset by
// the position plus the tx offset minus the ascent.
ADL adl = new ADL();
GlyphStrike gs = getGlyphStrike(ix);
gs.getADL(adl);
Point2D.Float adv = gs.strike.getGlyphMetrics(glyphs[ix]);
float wx = adv.x;
float wy = adv.y;
float hx = adl.descentX + adl.leadingX + adl.ascentX;
float hy = adl.descentY + adl.leadingY + adl.ascentY;
float x = positions[ix*2] + gs.dx - adl.ascentX;
float y = positions[ix*2+1] + gs.dy - adl.ascentY;
GeneralPath gp = new GeneralPath();
gp.moveTo(x, y);
gp.lineTo(x + wx, y + wy);
gp.lineTo(x + wx + hx, y + wy + hy);
gp.lineTo(x + hx, y + hy);
gp.closePath();
result = new DelegatingShape(gp);
lbcache[ix] = result;
}
return result;
}
private SoftReference<Shape[]> lbcacheRef;
public Shape getGlyphVisualBounds(int ix) {
if (ix < 0 || ix >= glyphs.length) {
throw new IndexOutOfBoundsException("ix = " + ix);
}
Shape[] vbcache;
if (vbcacheRef == null || (vbcache = vbcacheRef.get()) == null) {
vbcache = new Shape[glyphs.length];
vbcacheRef = new SoftReference<>(vbcache);
}
Shape result = vbcache[ix];
if (result == null) {
result = new DelegatingShape(getGlyphOutlineBounds(ix));
vbcache[ix] = result;
}
return result;
}
private SoftReference<Shape[]> vbcacheRef;
public Rectangle getGlyphPixelBounds(int index, FontRenderContext renderFRC, float x, float y) {
return getGlyphsPixelBounds(renderFRC, x, y, index, 1);
}
public GlyphMetrics getGlyphMetrics(int ix) {
if (ix < 0 || ix >= glyphs.length) {
throw new IndexOutOfBoundsException("ix = " + ix);
}
Rectangle2D vb = getGlyphVisualBounds(ix).getBounds2D();
Point2D pt = getGlyphPosition(ix);
vb.setRect(vb.getMinX() - pt.getX(),
vb.getMinY() - pt.getY(),
vb.getWidth(),
vb.getHeight());
Point2D.Float adv =
getGlyphStrike(ix).strike.getGlyphMetrics(glyphs[ix]);
GlyphMetrics gm = new GlyphMetrics(true, adv.x, adv.y,
vb,
GlyphMetrics.STANDARD);
return gm;
}
public GlyphJustificationInfo getGlyphJustificationInfo(int ix) {
if (ix < 0 || ix >= glyphs.length) {
throw new IndexOutOfBoundsException("ix = " + ix);
}
// currently we don't have enough information to do this right. should
// get info from the font and use real OT/GX justification. Right now
// sun/font/ExtendedTextSourceLabel assigns one of three infos
// based on whether the char is kanji, space, or other.
return null;
}
public boolean equals(GlyphVector rhs) {
if (this == rhs) {
return true;
}
if (rhs == null) {
return false;
}
try {
StandardGlyphVector other = (StandardGlyphVector)rhs;
if (glyphs.length != other.glyphs.length) {
return false;
}
for (int i = 0; i < glyphs.length; ++i) {
if (glyphs[i] != other.glyphs[i]) {
return false;
}
}
if (!font.equals(other.font)) {
return false;
}
if (!frc.equals(other.frc)) {
return false;
}
if ((other.positions == null) != (positions == null)) {
if (positions == null) {
initPositions();
} else {
other.initPositions();
}
}
if (positions != null) {
for (int i = 0; i < positions.length; ++i) {
if (positions[i] != other.positions[i]) {
return false;
}
}
}
if (gti == null) {
return other.gti == null;
} else {
return gti.equals(other.gti);
}
}
catch (ClassCastException e) {
// assume they are different simply by virtue of the class difference
return false;
}
}
/**
* As a concrete subclass of Object that implements equality, this must
* implement hashCode.
*/
public int hashCode() {
return font.hashCode() ^ glyphs.length;
}
/**
* Since we implement equality comparisons for GlyphVector, we implement
* the inherited Object.equals(Object) as well. GlyphVector should do
* this, and define two glyphvectors as not equal if the classes differ.
*/
public boolean equals(Object rhs) {
try {
return equals((GlyphVector)rhs);
}
catch (ClassCastException e) {
return false;
}
}
/**
* Sometimes I wish java had covariant return types...
*/
public StandardGlyphVector copy() {
return (StandardGlyphVector)clone();
}
/**
* As a concrete subclass of GlyphVector, this must implement clone.
*/
public Object clone() {
// positions, gti are mutable so we have to clone them
// font2d can be shared
// fsref is a cache and can be shared
try {
StandardGlyphVector result = (StandardGlyphVector)super.clone();
result.clearCaches();
if (positions != null) {
result.positions = positions.clone();
}
if (gti != null) {
result.gti = new GlyphTransformInfo(result, gti);
}
return result;
}
catch (CloneNotSupportedException e) {
}
return this;
}
//////////////////////
// StandardGlyphVector new public methods
/////////////////////
/*
* Set a multiple glyph positions at one time. GlyphVector only
* provides API to set a single glyph at a time.
*/
public void setGlyphPositions(float[] srcPositions, int srcStart,
int start, int count) {
if (count < 0) {
throw new IllegalArgumentException("count = " + count);
}
initPositions();
for (int i = start * 2, e = i + count * 2, p = srcStart; i < e; ++i, ++p) {
positions[i] = srcPositions[p];
}
clearCaches();
addFlags(FLAG_HAS_POSITION_ADJUSTMENTS);
}
/**
* Set all the glyph positions, including the 'after last glyph' position.
* The srcPositions array must be of length (numGlyphs + 1) * 2.
*/
public void setGlyphPositions(float[] srcPositions) {
int requiredLength = glyphs.length * 2 + 2;
if (srcPositions.length != requiredLength) {
throw new IllegalArgumentException("srcPositions.length != " + requiredLength);
}
positions = srcPositions.clone();
clearCaches();
addFlags(FLAG_HAS_POSITION_ADJUSTMENTS);
}
/**
* This is a convenience overload that gets all the glyph positions, which
* is what you usually want to do if you're getting more than one.
* !!! should I bother taking result parameter?
*/
public float[] getGlyphPositions(float[] result) {
return internalGetGlyphPositions(0, glyphs.length + 1, 0, result);
}
/**
* Get transform information for the requested range of glyphs.
* If no glyphs have a transform, return null.
* If a glyph has no transform (or is the identity transform) its entry in the result array will be null.
* If the passed-in result is null an array will be allocated for the caller.
* Each transform instance in the result array will unique, and independent of the GlyphVector's transform.
*/
public AffineTransform[] getGlyphTransforms(int start, int count, AffineTransform[] result) {
if (start < 0 || count < 0 || start + count > glyphs.length) {
throw new IllegalArgumentException("start: " + start + " count: " + count);
}
if (gti == null) {
return null;
}
if (result == null) {
result = new AffineTransform[count];
}
for (int i = 0; i < count; ++i, ++start) {
result[i] = gti.getGlyphTransform(start);
}
return result;
}
/**
* Convenience overload for getGlyphTransforms(int, int, AffineTransform[], int);
*/
public AffineTransform[] getGlyphTransforms() {
return getGlyphTransforms(0, glyphs.length, null);
}
/**
* Set a number of glyph transforms.
* Original transforms are unchanged. The array may contain nulls, and also may
* contain multiple references to the same transform instance.
*/
public void setGlyphTransforms(AffineTransform[] srcTransforms, int srcStart, int start, int count) {
for (int i = start, e = start + count; i < e; ++i) {
setGlyphTransform(i, srcTransforms[srcStart + i]);
}
}
/**
* Convenience overload of setGlyphTransforms(AffineTransform[], int, int, int).
*/
public void setGlyphTransforms(AffineTransform[] srcTransforms) {
setGlyphTransforms(srcTransforms, 0, 0, glyphs.length);
}
/**
* For each glyph return posx, posy, advx, advy, visx, visy, visw, vish.
*/
public float[] getGlyphInfo() {
setFRCTX();
initPositions();
float[] result = new float[glyphs.length * 8];
for (int i = 0, n = 0; i < glyphs.length; ++i, n += 8) {
float x = positions[i*2];
float y = positions[i*2+1];
result[n] = x;
result[n+1] = y;
int glyphID = glyphs[i];
GlyphStrike s = getGlyphStrike(i);
Point2D.Float adv = s.strike.getGlyphMetrics(glyphID);
result[n+2] = adv.x;
result[n+3] = adv.y;
Rectangle2D vb = getGlyphVisualBounds(i).getBounds2D();
result[n+4] = (float)(vb.getMinX());
result[n+5] = (float)(vb.getMinY());
result[n+6] = (float)(vb.getWidth());
result[n+7] = (float)(vb.getHeight());
}
return result;
}
//////////////////////
// StandardGlyphVector package private methods
/////////////////////
// used by glyphlist to determine if it needs to allocate/size positions array
// gti always uses positions because the gtx might have translation. We also
// need positions if the rendering dtx is different from the frctx.
boolean needsPositions(double[] devTX) {
return gti != null ||
(getLayoutFlags() & FLAG_HAS_POSITION_ADJUSTMENTS) != 0 ||
!matchTX(devTX, frctx);
}
// used by glyphList to get strong refs to font strikes for duration of rendering call
// if devTX matches current devTX, we're ready to go
// if we don't have multiple transforms, we're already ok
// !!! I'm not sure fontInfo works so well for glyphvector, since we have to be able to handle
// the multiple-strikes case
/*
* GlyphList calls this to set up its images data. First it calls needsPositions,
* passing the devTX, to see if it should provide us a positions array to fill.
* It only doesn't need them if we're a simple glyph vector whose frctx matches the
* devtx.
* Then it calls setupGlyphImages. If we need positions, we make sure we have our
* default positions based on the frctx first. Then we set the devTX, and use
* strikes based on it to generate the images. Finally, we fill in the positions
* array.
* If we have transforms, we delegate to gti. It depends on our having first
* initialized the positions and devTX.
*/
Object setupGlyphImages(long[] images, float[] positions, double[] devTX) {
initPositions(); // FIRST ensure we have positions based on our frctx
setRenderTransform(devTX); // THEN make sure we are using the desired devTX
if (gti != null) {
return gti.setupGlyphImages(images, positions, dtx);
}
GlyphStrike gs = getDefaultStrike();
gs.strike.getGlyphImagePtrs(glyphs, images, glyphs.length);
if (positions != null) {
if (dtx.isIdentity()) {
System.arraycopy(this.positions, 0, positions, 0, glyphs.length * 2);
} else {
dtx.transform(this.positions, 0, positions, 0, glyphs.length);
}
}
return gs;
}
//////////////////////
// StandardGlyphVector private methods
/////////////////////
// We keep translation in our frctx since getPixelBounds uses it. But
// GlyphList pulls out the translation and applies it separately, so
// we strip it out when we set the dtx. Basically nothing uses the
// translation except getPixelBounds.
// called by needsPositions, setRenderTransform
private static boolean matchTX(double[] lhs, AffineTransform rhs) {
return
lhs[0] == rhs.getScaleX() &&
lhs[1] == rhs.getShearY() &&
lhs[2] == rhs.getShearX() &&
lhs[3] == rhs.getScaleY();
}
// returns new tx if old one has translation, otherwise returns old one
private static AffineTransform getNonTranslateTX(AffineTransform tx) {
if (tx.getTranslateX() != 0 || tx.getTranslateY() != 0) {
tx = new AffineTransform(tx.getScaleX(), tx.getShearY(),
tx.getShearX(), tx.getScaleY(),
0, 0);
}
return tx;
}
private static boolean equalNonTranslateTX(AffineTransform lhs, AffineTransform rhs) {
return lhs.getScaleX() == rhs.getScaleX() &&
lhs.getShearY() == rhs.getShearY() &&
lhs.getShearX() == rhs.getShearX() &&
lhs.getScaleY() == rhs.getScaleY();
}
// called by setupGlyphImages (after needsPositions, so redundant match check?)
private void setRenderTransform(double[] devTX) {
assert(devTX.length == 4);
if (!matchTX(devTX, dtx)) {
resetDTX(new AffineTransform(devTX)); // no translation since devTX len == 4.
}
}
// called by getGlyphsPixelBounds
private void setDTX(AffineTransform tx) {
if (!equalNonTranslateTX(dtx, tx)) {
resetDTX(getNonTranslateTX(tx));
}
}
// called by most functions
private void setFRCTX() {
if (!equalNonTranslateTX(frctx, dtx)) {
resetDTX(getNonTranslateTX(frctx));
}
}
/**
* Change the dtx for the strike refs we use. Keeps a reference to the at. At
* must not contain translation.
* Called by setRenderTransform, setDTX, initFontData.
*/
private void resetDTX(AffineTransform at) {
fsref = null;
dtx = at;
invdtx = null;
if (!dtx.isIdentity()) {
try {
invdtx = dtx.createInverse();
}
catch (NoninvertibleTransformException e) {
// we needn't care for rendering
}
}
if (gti != null) {
gti.strikesRef = null;
}
}
/**
* Utility used by getStandardGV.
* Constructs a StandardGlyphVector from a generic glyph vector.
* Do not call this from new contexts without considering the comment
* about "userGlyphs".
*/
private StandardGlyphVector(GlyphVector gv, FontRenderContext frc) {
this.font = gv.getFont();
this.frc = frc;
initFontData();
int nGlyphs = gv.getNumGlyphs();
this.userGlyphs = gv.getGlyphCodes(0, nGlyphs, null);
if (gv instanceof StandardGlyphVector) {
/* userGlyphs will be OK because this is a private constructor
* and the returned instance is used only for rendering.
* It's not constructable by user code, nor returned to the
* application. So we know "userGlyphs" are valid as having
* been either already validated or are the result of layout.
*/
this.glyphs = userGlyphs;
} else {
this.glyphs = getValidatedGlyphs(this.userGlyphs);
}
this.flags = gv.getLayoutFlags() & FLAG_MASK;
if ((flags & FLAG_HAS_POSITION_ADJUSTMENTS) != 0) {
this.positions = gv.getGlyphPositions(0, nGlyphs + 1, null);
}
if ((flags & FLAG_COMPLEX_GLYPHS) != 0) {
this.charIndices = gv.getGlyphCharIndices(0, nGlyphs, null);
}
if ((flags & FLAG_HAS_TRANSFORMS) != 0) {
AffineTransform[] txs = new AffineTransform[nGlyphs]; // worst case
for (int i = 0; i < nGlyphs; ++i) {
txs[i] = gv.getGlyphTransform(i); // gv doesn't have getGlyphsTransforms
}
setGlyphTransforms(txs);
}
}
/* Before asking the Font we see if the glyph code is
* FFFE or FFFF which are special values that we should be internally
* ready to handle as meaning invisible glyphs. The Font would report
* those as the missing glyph.
*/
int[] getValidatedGlyphs(int[] oglyphs) {
int len = oglyphs.length;
int[] vglyphs = new int[len];
for (int i=0; i<len; i++) {
if (oglyphs[i] == 0xFFFE || oglyphs[i] == 0xFFFF) {
vglyphs[i] = oglyphs[i];
} else {
vglyphs[i] = font2D.getValidatedGlyphCode(oglyphs[i]);
}
}
return vglyphs;
}
// utility used by constructors
private void init(Font font, char[] text, int start, int count,
FontRenderContext frc, int flags) {
if (start < 0 || count < 0 || start + count > text.length) {
throw new ArrayIndexOutOfBoundsException("start or count out of bounds");
}
this.font = font;
this.frc = frc;
this.flags = flags;
if (getTracking(font) != 0) {
addFlags(FLAG_HAS_POSITION_ADJUSTMENTS);
}
// !!! change mapper interface?
if (start != 0) {
char[] temp = new char[count];
System.arraycopy(text, start, temp, 0, count);
text = temp;
}
initFontData(); // sets up font2D
// !!! no layout for now, should add checks
// !!! need to support creating a StandardGlyphVector from a TextMeasurer's info...
glyphs = new int[count]; // hmmm
/* Glyphs obtained here are already validated by the font */
userGlyphs = glyphs;
font2D.getMapper().charsToGlyphs(count, text, glyphs);
}
private void initFontData() {
font2D = FontUtilities.getFont2D(font);
if (font2D instanceof FontSubstitution) {
font2D = ((FontSubstitution)font2D).getCompositeFont2D();
}
float s = font.getSize2D();
if (font.isTransformed()) {
ftx = font.getTransform();
if (ftx.getTranslateX() != 0 || ftx.getTranslateY() != 0) {
addFlags(FLAG_HAS_POSITION_ADJUSTMENTS);
}
ftx.setTransform(ftx.getScaleX(), ftx.getShearY(), ftx.getShearX(), ftx.getScaleY(), 0, 0);
ftx.scale(s, s);
} else {
ftx = AffineTransform.getScaleInstance(s, s);
}
frctx = frc.getTransform();
resetDTX(getNonTranslateTX(frctx));
}
/**
* Copy glyph position data into a result array starting at the indicated
* offset in the array. If the passed-in result array is null, a new
* array will be allocated and returned.
*
* This is an internal method and does no extra argument checking.
*
* @param start the index of the first glyph to get
* @param count the number of glyphs to get
* @param offset the offset into result at which to put the data
* @param result an array to hold the x,y positions
* @return the modified position array
*/
private float[] internalGetGlyphPositions(int start, int count, int offset, float[] result) {
if (result == null) {
result = new float[offset + count * 2];
}
initPositions();
// System.arraycopy is slow for stuff like this
for (int i = offset, e = offset + count * 2, p = start * 2; i < e; ++i, ++p) {
result[i] = positions[p];
}
return result;
}
private Rectangle2D getGlyphOutlineBounds(int ix) {
setFRCTX();
initPositions();
return getGlyphStrike(ix).getGlyphOutlineBounds(glyphs[ix], positions[ix*2], positions[ix*2+1]);
}
/**
* Used by getOutline, getGlyphsOutline
*/
private Shape getGlyphsOutline(int start, int count, float x, float y) {
setFRCTX();
initPositions();
GeneralPath result = new GeneralPath(GeneralPath.WIND_NON_ZERO);
for (int i = start, e = start + count, n = start * 2; i < e; ++i, n += 2) {
float px = x + positions[n];
float py = y + positions[n+1];
getGlyphStrike(i).appendGlyphOutline(glyphs[i], result, px, py);
}
return result;
}
private Rectangle getGlyphsPixelBounds(FontRenderContext frc, float x, float y, int start, int count) {
initPositions(); // FIRST ensure we have positions based on our frctx
AffineTransform tx = null;
if (frc == null || frc.equals(this.frc)) {
tx = frctx;
} else {
tx = frc.getTransform();
}
setDTX(tx); // need to get the right strikes, but we use tx itself to translate the points
if (gti != null) {
return gti.getGlyphsPixelBounds(tx, x, y, start, count);
}
FontStrike fs = getDefaultStrike().strike;
Rectangle result = null;
Rectangle r = new Rectangle();
Point2D.Float pt = new Point.Float();
int n = start * 2;
while (--count >= 0) {
pt.x = x + positions[n++];
pt.y = y + positions[n++];
tx.transform(pt, pt);
fs.getGlyphImageBounds(glyphs[start++], pt, r);
if (!r.isEmpty()) {
if (result == null) {
result = new Rectangle(r);
} else {
result.add(r);
}
}
}
return result != null ? result : r;
}
private void clearCaches(int ix) {
if (lbcacheRef != null) {
Shape[] lbcache = lbcacheRef.get();
if (lbcache != null) {
lbcache[ix] = null;
}
}
if (vbcacheRef != null) {
Shape[] vbcache = vbcacheRef.get();
if (vbcache != null) {
vbcache[ix] = null;
}
}
}
private void clearCaches() {
lbcacheRef = null;
vbcacheRef = null;
}
// internal use only for possible future extension
/**
* A flag used with getLayoutFlags that indicates whether this {@code GlyphVector} uses
* a vertical baseline.
*/
public static final int FLAG_USES_VERTICAL_BASELINE = 128;
/**
* A flag used with getLayoutFlags that indicates whether this {@code GlyphVector} uses
* vertical glyph metrics. A {@code GlyphVector} can use vertical metrics on a
* horizontal line, or vice versa.
*/
public static final int FLAG_USES_VERTICAL_METRICS = 256;
/**
* A flag used with getLayoutFlags that indicates whether this {@code GlyphVector} uses
* the 'alternate orientation.' Glyphs have a default orientation given a
* particular baseline and metrics orientation, this is the orientation appropriate
* for left-to-right text. For example, the letter 'A' can have four orientations,
* with the point at 12, 3, 6, or 9 'o clock. The following table shows where the
* point displays for different values of vertical baseline (vb), vertical
* metrics (vm) and alternate orientation (fo):<br>
* <blockquote>
* vb vm ao
* -- -- -- --
* f f f 12 ^ horizontal metrics on horizontal lines
* f f t 6 v
* f t f 9 < vertical metrics on horizontal lines
* f t t 3 >
* t f f 3 > horizontal metrics on vertical lines
* t f t 9 <
* t t f 12 ^ vertical metrics on vertical lines
* t t t 6 v
* </blockquote>
*/
public static final int FLAG_USES_ALTERNATE_ORIENTATION = 512;
/**
* Ensure that the positions array exists and holds position data.
* If the array is null, this allocates it and sets default positions.
*/
private void initPositions() {
if (positions == null) {
setFRCTX();
positions = new float[glyphs.length * 2 + 2];
Point2D.Float trackPt = null;
float track = getTracking(font);
if (track != 0) {
track *= font.getSize2D();
trackPt = new Point2D.Float(track, 0); // advance delta
}
Point2D.Float pt = new Point2D.Float(0, 0);
if (font.isTransformed()) {
AffineTransform at = font.getTransform();
at.transform(pt, pt);
positions[0] = pt.x;
positions[1] = pt.y;
if (trackPt != null) {
at.deltaTransform(trackPt, trackPt);
}
}
for (int i = 0, n = 2; i < glyphs.length; ++i, n += 2) {
getGlyphStrike(i).addDefaultGlyphAdvance(glyphs[i], pt);
if (trackPt != null) {
pt.x += trackPt.x;
pt.y += trackPt.y;
}
positions[n] = pt.x;
positions[n+1] = pt.y;
}
}
}
/**
* OR newFlags with existing flags. First computes existing flags if needed.
*/
private void addFlags(int newflags) {
flags = getLayoutFlags() | newflags;
}
/**
* AND the complement of clearedFlags with existing flags. First computes existing flags if needed.
*/
private void clearFlags(int clearedFlags) {
flags = getLayoutFlags() & ~clearedFlags;
}
// general utility methods
// encapsulate the test to check whether we have per-glyph transforms
private GlyphStrike getGlyphStrike(int ix) {
if (gti == null) {
return getDefaultStrike();
} else {
return gti.getStrike(ix);
}
}
// encapsulate access to cached default glyph strike
private GlyphStrike getDefaultStrike() {
GlyphStrike gs = null;
if (fsref != null) {
gs = fsref.get();
}
if (gs == null) {
gs = GlyphStrike.create(this, dtx, null);
fsref = new SoftReference<>(gs);
}
return gs;
}
/////////////////////
// Internal utility classes
/////////////////////
// !!! I have this as a separate class instead of just inside SGV,
// but I previously didn't bother. Now I'm trying this again.
// Probably still not worth it, but I'd like to keep sgv's small in the common case.
static final class GlyphTransformInfo {
StandardGlyphVector sgv; // reference back to glyph vector - yuck
int[] indices; // index into unique strikes
double[] transforms; // six doubles per unique transform, because AT is a pain to manipulate
SoftReference<GlyphStrike[]> strikesRef; // ref to unique strikes, one per transform
boolean haveAllStrikes; // true if the strike array has been filled by getStrikes().
// used when first setting a transform
GlyphTransformInfo(StandardGlyphVector sgv) {
this.sgv = sgv;
}
// used when cloning a glyph vector, need to set back link
GlyphTransformInfo(StandardGlyphVector sgv, GlyphTransformInfo rhs) {
this.sgv = sgv;
this.indices = rhs.indices == null ? null : rhs.indices.clone();
this.transforms = rhs.transforms == null ? null : rhs.transforms.clone();
this.strikesRef = null; // can't share cache, so rather than clone, we just null out
}
// used in sgv equality
public boolean equals(GlyphTransformInfo rhs) {
if (rhs == null) {
return false;
}
if (rhs == this) {
return true;
}
if (this.indices.length != rhs.indices.length) {
return false;
}
if (this.transforms.length != rhs.transforms.length) {
return false;
}
// slow since we end up processing the same transforms multiple
// times, but since transforms can be in any order, we either do
// this or create a mapping. Equality tests aren't common so
// leave it like this.
for (int i = 0; i < this.indices.length; ++i) {
int tix = this.indices[i];
int rix = rhs.indices[i];
if ((tix == 0) != (rix == 0)) {
return false;
}
if (tix != 0) {
tix *= 6;
rix *= 6;
for (int j = 6; j > 0; --j) {
if (this.indices[--tix] != rhs.indices[--rix]) {
return false;
}
}
}
}
return true;
}
// implements sgv.setGlyphTransform
void setGlyphTransform(int glyphIndex, AffineTransform newTX) {
// we store all the glyph transforms as a double array, and for each glyph there
// is an entry in the txIndices array indicating which transform to use. 0 means
// there's no transform, 1 means use the first transform (the 6 doubles at offset
// 0), 2 means use the second transform (the 6 doubles at offset 6), etc.
//
// Since this can be called multiple times, and since the number of transforms
// affects the time it takes to construct the glyphs, we try to keep the arrays as
// compact as possible, by removing transforms that are no longer used, and reusing
// transforms where we already have them.
double[] temp = new double[6];
boolean isIdentity = true;
if (newTX == null || newTX.isIdentity()) {
// Fill in temp
temp[0] = temp[3] = 1.0;
}
else {
isIdentity = false;
newTX.getMatrix(temp);
}
if (indices == null) {
if (isIdentity) { // no change
return;
}
indices = new int[sgv.glyphs.length];
indices[glyphIndex] = 1;
transforms = temp;
} else {
boolean addSlot = false; // assume we're not growing
int newIndex = -1;
if (isIdentity) {
newIndex = 0; // might shrink
} else {
addSlot = true; // assume no match
int i;
loop:
for (i = 0; i < transforms.length; i += 6) {
for (int j = 0; j < 6; ++j) {
if (transforms[i + j] != temp[j]) {
continue loop;
}
}
addSlot = false;
break;
}
newIndex = i / 6 + 1; // if no match, end of list
}
// if we're using the same transform, nothing to do
int oldIndex = indices[glyphIndex];
if (newIndex != oldIndex) {
// see if we are removing last use of the old slot
boolean removeSlot = false;
if (oldIndex != 0) {
removeSlot = true;
for (int i = 0; i < indices.length; ++i) {
if (indices[i] == oldIndex && i != glyphIndex) {
removeSlot = false;
break;
}
}
}
if (removeSlot && addSlot) { // reuse old slot with new transform
newIndex = oldIndex;
System.arraycopy(temp, 0, transforms, (newIndex - 1) * 6, 6);
} else if (removeSlot) {
if (transforms.length == 6) { // removing last one, so clear arrays
indices = null;
transforms = null;
sgv.clearCaches(glyphIndex);
sgv.clearFlags(FLAG_HAS_TRANSFORMS);
strikesRef = null;
return;
}
double[] ttemp = new double[transforms.length - 6];
System.arraycopy(transforms, 0, ttemp, 0, (oldIndex - 1) * 6);
System.arraycopy(transforms, oldIndex * 6, ttemp, (oldIndex - 1) * 6,
transforms.length - oldIndex * 6);
transforms = ttemp;
// clean up indices
for (int i = 0; i < indices.length; ++i) {
if (indices[i] > oldIndex) { // ignore == oldIndex, it's going away
indices[i] -= 1;
}
}
if (newIndex > oldIndex) { // don't forget to decrement this too if we need to
--newIndex;
}
} else if (addSlot) {
double[] ttemp = new double[transforms.length + 6];
System.arraycopy(transforms, 0, ttemp, 0, transforms.length);
System.arraycopy(temp, 0, ttemp, transforms.length, 6);
transforms = ttemp;
}
indices[glyphIndex] = newIndex;
}
}
sgv.clearCaches(glyphIndex);
sgv.addFlags(FLAG_HAS_TRANSFORMS);
strikesRef = null;
}
// implements sgv.getGlyphTransform
AffineTransform getGlyphTransform(int ix) {
int index = indices[ix];
if (index == 0) {
return null;
}
int x = (index - 1) * 6;
return new AffineTransform(transforms[x + 0],
transforms[x + 1],
transforms[x + 2],
transforms[x + 3],
transforms[x + 4],
transforms[x + 5]);
}
int transformCount() {
if (transforms == null) {
return 0;
}
return transforms.length / 6;
}
/**
* The strike cache works like this.
*
* -Each glyph is thought of as having a transform, usually identity.
* -Each request for a strike is based on a device transform, either the
* one in the frc or the rendering transform.
* -For general info, strikes are held with soft references.
* -When rendering, strikes must be held with hard references for the
* duration of the rendering call. GlyphList will have to hold this
* info along with the image and position info, but toss the strike info
* when done.
* -Build the strike cache as needed. If the dev transform we want to use
* has changed from the last time it is built, the cache is flushed by
* the caller before these methods are called.
*
* Use a tx that doesn't include translation components of dst tx.
*/
Object setupGlyphImages(long[] images, float[] positions, AffineTransform tx) {
int len = sgv.glyphs.length;
GlyphStrike[] sl = getAllStrikes();
for (int i = 0; i < len; ++i) {
GlyphStrike gs = sl[indices[i]];
int glyphID = sgv.glyphs[i];
images[i] = gs.strike.getGlyphImagePtr(glyphID);
gs.getGlyphPosition(glyphID, i*2, sgv.positions, positions);
}
tx.transform(positions, 0, positions, 0, len);
return sl;
}
Rectangle getGlyphsPixelBounds(AffineTransform tx, float x, float y, int start, int count) {
Rectangle result = null;
Rectangle r = new Rectangle();
Point2D.Float pt = new Point.Float();
int n = start * 2;
while (--count >= 0) {
GlyphStrike gs = getStrike(start);
pt.x = x + sgv.positions[n++] + gs.dx;
pt.y = y + sgv.positions[n++] + gs.dy;
tx.transform(pt, pt);
gs.strike.getGlyphImageBounds(sgv.glyphs[start++], pt, r);
if (!r.isEmpty()) {
if (result == null) {
result = new Rectangle(r);
} else {
result.add(r);
}
}
}
return result != null ? result : r;
}
GlyphStrike getStrike(int glyphIndex) {
if (indices != null) {
GlyphStrike[] strikes = getStrikeArray();
return getStrikeAtIndex(strikes, indices[glyphIndex]);
}
return sgv.getDefaultStrike();
}
private GlyphStrike[] getAllStrikes() {
if (indices == null) {
return null;
}
GlyphStrike[] strikes = getStrikeArray();
if (!haveAllStrikes) {
for (int i = 0; i < strikes.length; ++i) {
getStrikeAtIndex(strikes, i);
}
haveAllStrikes = true;
}
return strikes;
}
private GlyphStrike[] getStrikeArray() {
GlyphStrike[] strikes = null;
if (strikesRef != null) {
strikes = strikesRef.get();
}
if (strikes == null) {
haveAllStrikes = false;
strikes = new GlyphStrike[transformCount() + 1];
strikesRef = new SoftReference<>(strikes);
}
return strikes;
}
private GlyphStrike getStrikeAtIndex(GlyphStrike[] strikes, int strikeIndex) {
GlyphStrike strike = strikes[strikeIndex];
if (strike == null) {
if (strikeIndex == 0) {
strike = sgv.getDefaultStrike();
} else {
int ix = (strikeIndex - 1) * 6;
AffineTransform gtx = new AffineTransform(transforms[ix],
transforms[ix+1],
transforms[ix+2],
transforms[ix+3],
transforms[ix+4],
transforms[ix+5]);
strike = GlyphStrike.create(sgv, sgv.dtx, gtx);
}
strikes[strikeIndex] = strike;
}
return strike;
}
}
// This adjusts the metrics by the translation components of the glyph
// transform. It is done here since the translation is not known by the
// strike.
// It adjusts the position of the image and the advance.
public static final class GlyphStrike {
StandardGlyphVector sgv;
FontStrike strike; // hard reference
float dx;
float dy;
static GlyphStrike create(StandardGlyphVector sgv, AffineTransform dtx, AffineTransform gtx) {
float dx = 0;
float dy = 0;
AffineTransform tx = sgv.ftx;
if (!dtx.isIdentity() || gtx != null) {
tx = new AffineTransform(sgv.ftx);
if (gtx != null) {
tx.preConcatenate(gtx);
dx = (float)tx.getTranslateX(); // uses ftx then gtx to get translation
dy = (float)tx.getTranslateY();
}
if (!dtx.isIdentity()) {
tx.preConcatenate(dtx);
}
}
int ptSize = 1; // only matters for 'gasp' case.
Object aaHint = sgv.frc.getAntiAliasingHint();
if (aaHint == VALUE_TEXT_ANTIALIAS_GASP) {
/* Must pass in the calculated point size for rendering.
* If the glyph tx is anything other than identity or a
* simple translate, calculate the transformed point size.
*/
if (!tx.isIdentity() &&
(tx.getType() & ~AffineTransform.TYPE_TRANSLATION) != 0) {
double shearx = tx.getShearX();
if (shearx != 0) {
double scaley = tx.getScaleY();
ptSize =
(int)Math.sqrt(shearx * shearx + scaley * scaley);
} else {
ptSize = (int)(Math.abs(tx.getScaleY()));
}
}
}
int aa = FontStrikeDesc.getAAHintIntVal(aaHint,sgv.font2D, ptSize);
int fm = FontStrikeDesc.getFMHintIntVal
(sgv.frc.getFractionalMetricsHint());
FontStrikeDesc desc = new FontStrikeDesc(dtx,
tx,
sgv.font.getStyle(),
aa, fm);
// Get the strike via the handle. Shouldn't matter
// if we've invalidated the font but its an extra precaution.
// do we want the CompFont from CFont here ?
Font2D f2d = sgv.font2D;
if (f2d instanceof FontSubstitution) {
f2d = ((FontSubstitution)f2d).getCompositeFont2D();
}
FontStrike strike = f2d.handle.font2D.getStrike(desc); // !!! getStrike(desc, false)
return new GlyphStrike(sgv, strike, dx, dy);
}
private GlyphStrike(StandardGlyphVector sgv, FontStrike strike, float dx, float dy) {
this.sgv = sgv;
this.strike = strike;
this.dx = dx;
this.dy = dy;
}
void getADL(ADL result) {
StrikeMetrics sm = strike.getFontMetrics();
Point2D.Float delta = null;
if (sgv.font.isTransformed()) {
delta = new Point2D.Float();
delta.x = (float)sgv.font.getTransform().getTranslateX();
delta.y = (float)sgv.font.getTransform().getTranslateY();
}
result.ascentX = -sm.ascentX;
result.ascentY = -sm.ascentY;
result.descentX = sm.descentX;
result.descentY = sm.descentY;
result.leadingX = sm.leadingX;
result.leadingY = sm.leadingY;
}
void getGlyphPosition(int glyphID, int ix, float[] positions, float[] result) {
result[ix] = positions[ix] + dx;
++ix;
result[ix] = positions[ix] + dy;
}
void addDefaultGlyphAdvance(int glyphID, Point2D.Float result) {
// !!! change this API? Creates unnecessary garbage. Also the name doesn't quite fit.
// strike.addGlyphAdvance(Point2D.Float adv); // hey, whaddya know, matches my api :-)
Point2D.Float adv = strike.getGlyphMetrics(glyphID);
result.x += adv.x + dx;
result.y += adv.y + dy;
}
Rectangle2D getGlyphOutlineBounds(int glyphID, float x, float y) {
Rectangle2D result = null;
if (sgv.invdtx == null) {
result = new Rectangle2D.Float();
result.setRect(strike.getGlyphOutlineBounds(glyphID)); // don't mutate cached rect
} else {
GeneralPath gp = strike.getGlyphOutline(glyphID, 0, 0);
gp.transform(sgv.invdtx);
result = gp.getBounds2D();
}
/* Since x is the logical advance of the glyph to this point.
* Because of the way that Rectangle.union is specified, this
* means that subsequent unioning of a rect including that
* will be affected, even if the glyph is empty. So skip such
* cases. This alone isn't a complete solution since x==0
* may also not be what is wanted. The code that does the
* unioning also needs to be aware to ignore empty glyphs.
*/
if (!result.isEmpty()) {
result.setRect(result.getMinX() + x + dx,
result.getMinY() + y + dy,
result.getWidth(), result.getHeight());
}
return result;
}
void appendGlyphOutline(int glyphID, GeneralPath result, float x, float y) {
// !!! fontStrike needs a method for this. For that matter, GeneralPath does.
GeneralPath gp = null;
if (sgv.invdtx == null) {
gp = strike.getGlyphOutline(glyphID, x + dx, y + dy);
} else {
gp = strike.getGlyphOutline(glyphID, 0, 0);
gp.transform(sgv.invdtx);
gp.transform(AffineTransform.getTranslateInstance(x + dx, y + dy));
}
PathIterator iterator = gp.getPathIterator(null);
result.append(iterator, false);
}
}
public String toString() {
return appendString(null).toString();
}
StringBuffer appendString(StringBuffer buf) {
if (buf == null) {
buf = new StringBuffer();
}
try {
buf.append("SGV{font: ");
buf.append(font.toString());
buf.append(", frc: ");
buf.append(frc.toString());
buf.append(", glyphs: (");
buf.append(glyphs.length);
buf.append(")[");
for (int i = 0; i < glyphs.length; ++i) {
if (i > 0) {
buf.append(", ");
}
buf.append(Integer.toHexString(glyphs[i]));
}
buf.append("]");
if (positions != null) {
buf.append(", positions: (");
buf.append(positions.length);
buf.append(")[");
for (int i = 0; i < positions.length; i += 2) {
if (i > 0) {
buf.append(", ");
}
buf.append(positions[i]);
buf.append("@");
buf.append(positions[i+1]);
}
buf.append("]");
}
if (charIndices != null) {
buf.append(", indices: (");
buf.append(charIndices.length);
buf.append(")[");
for (int i = 0; i < charIndices.length; ++i) {
if (i > 0) {
buf.append(", ");
}
buf.append(charIndices[i]);
}
buf.append("]");
}
buf.append(", flags:");
if (getLayoutFlags() == 0) {
buf.append(" default");
} else {
if ((flags & FLAG_HAS_TRANSFORMS) != 0) {
buf.append(" tx");
}
if ((flags & FLAG_HAS_POSITION_ADJUSTMENTS) != 0) {
buf.append(" pos");
}
if ((flags & FLAG_RUN_RTL) != 0) {
buf.append(" rtl");
}
if ((flags & FLAG_COMPLEX_GLYPHS) != 0) {
buf.append(" complex");
}
}
}
catch(Exception e) {
buf.append(' ').append(e.getMessage());
}
buf.append('}');
return buf;
}
static class ADL {
public float ascentX;
public float ascentY;
public float descentX;
public float descentY;
public float leadingX;
public float leadingY;
public String toString() {
return toStringBuffer(null).toString();
}
protected StringBuffer toStringBuffer(StringBuffer result) {
if (result == null) {
result = new StringBuffer();
}
result.append("ax: ");
result.append(ascentX);
result.append(" ay: ");
result.append(ascentY);
result.append(" dx: ");
result.append(descentX);
result.append(" dy: ");
result.append(descentY);
result.append(" lx: ");
result.append(leadingX);
result.append(" ly: ");
result.append(leadingY);
return result;
}
}
}