/*
* Copyright 2003-2004 Sun Microsystems, Inc. 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. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
package sun.font;
import java.awt.geom.AffineTransform;
import java.awt.geom.GeneralPath;
import java.awt.geom.Point2D;
import java.awt.Rectangle;
import java.awt.geom.Rectangle2D;
import java.awt.geom.NoninvertibleTransformException;
class NativeStrike extends PhysicalStrike {
NativeFont nativeFont;
int numGlyphs;
AffineTransform invertDevTx;
AffineTransform fontTx;
/* The following method prepares data used in obtaining FontMetrics.
* This is the one case in which we allow anything other than a
* simple scale to be used with a native font. We do this because in
* order to ensure that clients get the overall metrics they expect
* for a font whatever coordinate system (combination of font and
* device transform) they use.
* X11 fonts can only have a scale applied (remind : non-uniform?)
* We strip out everything else and if necessary obtain an inverse
* tx which we use to return metrics for the font in the transformed
* coordinate system of the font. ie we pass X11 a simple scale, and
* then apply the non-scale part of the font TX to that result.
*/
private int getNativePointSize() {
/* Make a copy of the glyphTX in which we will store the
* font transform, inverting the devTx if necessary
*/
double[] mat = new double[4];
desc.glyphTx.getMatrix(mat);
fontTx = new AffineTransform(mat);
/* Now work backwards to get the font transform */
if (!desc.devTx.isIdentity() &&
desc.devTx.getType() != AffineTransform.TYPE_TRANSLATION) {
try {
invertDevTx = desc.devTx.createInverse();
fontTx.concatenate(invertDevTx);
} catch (NoninvertibleTransformException e) {
e.printStackTrace();
}
}
/* At this point the fontTx may be a simple +ve scale, or it
* may be something more complex.
*/
Point2D.Float pt = new Point2D.Float(1f,1f);
fontTx.deltaTransform(pt, pt);
double ptSize = Math.abs(pt.y);
int ttype = fontTx.getType();
if ((ttype & ~AffineTransform.TYPE_UNIFORM_SCALE) != 0 ||
fontTx.getScaleY() <= 0) {
/* We need to create an inverse transform that doesn't
* include the point size (strictly the uniform scale)
*/
fontTx.scale(1/ptSize, 1/ptSize);
} else {
fontTx = null; // no need
}
return (int)ptSize;
}
NativeStrike(NativeFont nativeFont, FontStrikeDesc desc) {
super(nativeFont, desc);
this.nativeFont = nativeFont;
/* If this is a delegate for bitmaps, we expect to have
* been invoked only for a simple scale. If that's not
* true, just bail
*/
if (nativeFont.isBitmapDelegate) {
int ttype = desc.glyphTx.getType();
if ((ttype & ~AffineTransform.TYPE_UNIFORM_SCALE) != 0 ||
desc.glyphTx.getScaleX() <= 0) {
numGlyphs = 0;
return;
}
}
int ptSize = getNativePointSize();
byte [] nameBytes = nativeFont.getPlatformNameBytes(ptSize);
double scale = Math.abs(desc.devTx.getScaleX());
pScalerContext = createScalerContext(nameBytes, ptSize, scale);
if (pScalerContext == 0L) {
FontManager.deRegisterBadFont(nativeFont);
pScalerContext = createNullScalerContext();
numGlyphs = 0;
if (FontManager.logging) {
FontManager.logger.severe("Could not create native strike " +
new String(nameBytes));
}
return;
}
numGlyphs = nativeFont.getMapper().getNumGlyphs();
this.disposer = new NativeStrikeDisposer(nativeFont, desc,
pScalerContext);
}
/* The asymmetry of the following methods is to help preserve
* performance with minimal textual changes to the calling code
* when moving initialisation of these arrays out of the constructor.
* This may be restructured later when there's more room for changes
*/
private boolean usingIntGlyphImages() {
if (intGlyphImages != null) {
return true;
} else if (FontManager.longAddresses) {
return false;
} else {
/* We could obtain minGlyphIndex and index relative to that
* if we need to save space.
*/
int glyphLenArray = getMaxGlyph(pScalerContext);
/* This shouldn't be necessary - its a precaution */
if (glyphLenArray < numGlyphs) {
glyphLenArray = numGlyphs;
}
intGlyphImages = new int[glyphLenArray];
this.disposer.intGlyphImages = intGlyphImages;
return true;
}
}
private long[] getLongGlyphImages() {
if (longGlyphImages == null && FontManager.longAddresses) {
/* We could obtain minGlyphIndex and index relative to that
* if we need to save space.
*/
int glyphLenArray = getMaxGlyph(pScalerContext);
/* This shouldn't be necessary - its a precaution */
if (glyphLenArray < numGlyphs) {
glyphLenArray = numGlyphs;
}
longGlyphImages = new long[glyphLenArray];
this.disposer.longGlyphImages = longGlyphImages;
}
return longGlyphImages;
}
NativeStrike(NativeFont nativeFont, FontStrikeDesc desc,
boolean nocache) {
super(nativeFont, desc);
this.nativeFont = nativeFont;
int ptSize = (int)desc.glyphTx.getScaleY();
double scale = desc.devTx.getScaleX(); // uniform scale
byte [] nameBytes = nativeFont.getPlatformNameBytes(ptSize);
pScalerContext = createScalerContext(nameBytes, ptSize, scale);
int numGlyphs = nativeFont.getMapper().getNumGlyphs();
}
/* We want the native font to be responsible for reporting the
* font metrics, even if it often delegates to another font.
* The code here isn't yet implementing exactly that. If the glyph
* transform was something native couldn't handle, there's no native
* context from which to obtain metrics. Need to revise this to obtain
* the metrics and transform them. But currently in such a case it
* gets the metrics from a different font - its glyph delegate font.
*/
StrikeMetrics getFontMetrics() {
if (strikeMetrics == null) {
if (pScalerContext != 0) {
strikeMetrics = nativeFont.getFontMetrics(pScalerContext);
}
if (strikeMetrics != null && fontTx != null) {
strikeMetrics.convertToUserSpace(fontTx);
}
}
return strikeMetrics;
}
private native long createScalerContext(byte[] nameBytes,
int ptSize, double scale);
private native int getMaxGlyph(long pScalerContext);
private native long createNullScalerContext();
void getGlyphImagePtrs(int[] glyphCodes, long[] images,int len) {
for (int i=0; i<len; i++) {
images[i] = getGlyphImagePtr(glyphCodes[i]);
}
}
long getGlyphImagePtr(int glyphCode) {
long glyphPtr;
if (usingIntGlyphImages()) {
if ((glyphPtr = intGlyphImages[glyphCode] & INTMASK) != 0L) {
return glyphPtr;
} else {
glyphPtr = nativeFont.getGlyphImage(pScalerContext,glyphCode);
/* Synchronize in case some other thread has updated this
* cache entry already - unlikely but possible.
*/
synchronized (this) {
if (intGlyphImages[glyphCode] == 0) {
intGlyphImages[glyphCode] = (int)glyphPtr;
return glyphPtr;
} else {
StrikeCache.freeIntPointer((int)glyphPtr);
return intGlyphImages[glyphCode] & INTMASK;
}
}
}
}
/* must be using long (8 byte) addresses */
else if ((glyphPtr = getLongGlyphImages()[glyphCode]) != 0L) {
return glyphPtr;
} else {
glyphPtr = nativeFont.getGlyphImage(pScalerContext, glyphCode);
synchronized (this) {
if (longGlyphImages[glyphCode] == 0L) {
longGlyphImages[glyphCode] = glyphPtr;
return glyphPtr;
} else {
StrikeCache.freeLongPointer(glyphPtr);
return longGlyphImages[glyphCode];
}
}
}
}
/* This is used when a FileFont uses the native names to create a
* delegate NativeFont/Strike to get images from native. This is used
* because Solaris TrueType fonts have external PCF bitmaps rather than
* embedded bitmaps. This is really only important for CJK fonts as
* for most scripts the external X11 bitmaps aren't much better - if
* at all - than the results from hinting the outlines.
*/
long getGlyphImagePtrNoCache(int glyphCode) {
return nativeFont.getGlyphImageNoDefault(pScalerContext, glyphCode);
}
void getGlyphImageBounds(int glyphcode, Point2D.Float pt,
Rectangle result) {
}
Point2D.Float getGlyphMetrics(int glyphCode) {
Point2D.Float pt = new Point2D.Float(getGlyphAdvance(glyphCode), 0f);
return pt;
}
float getGlyphAdvance(int glyphCode) {
return nativeFont.getGlyphAdvance(pScalerContext, glyphCode);
}
Rectangle2D.Float getGlyphOutlineBounds(int glyphCode) {
return nativeFont.getGlyphOutlineBounds(pScalerContext, glyphCode);
}
GeneralPath getGlyphOutline(int glyphCode, float x, float y) {
return new GeneralPath();
}
GeneralPath getGlyphVectorOutline(int[] glyphs, float x, float y) {
return new GeneralPath();
}
}
/* Returned instead of a NativeStrike.
* It can intercept any request it wants, but mostly
* passes them on to its delegate strike. It is important that
* it override all the inherited FontStrike methods to delegate them
* appropriately.
*/
class DelegateStrike extends NativeStrike {
private FontStrike delegateStrike;
DelegateStrike(NativeFont nativeFont, FontStrikeDesc desc,
FontStrike delegate) {
super(nativeFont, desc);
this.delegateStrike = delegate;
}
/* We want the native font to be responsible for reporting the
* font metrics, even if it often delegates to another font.
* The code here isn't yet implementing exactly that. If the glyph
* transform was something native couldn't handle, there's no native
* context from which to obtain metrics. Need to revise this to obtain
* the metrics and transform them. But currently in such a case it
* gets the metrics from a different font - its glyph delegate font.
*/
StrikeMetrics getFontMetrics() {
if (strikeMetrics == null) {
if (pScalerContext != 0) {
strikeMetrics = super.getFontMetrics();
}
if (strikeMetrics == null) {
strikeMetrics = delegateStrike.getFontMetrics();
}
}
return strikeMetrics;
}
void getGlyphImagePtrs(int[] glyphCodes, long[] images,int len) {
delegateStrike.getGlyphImagePtrs(glyphCodes, images, len);
}
long getGlyphImagePtr(int glyphCode) {
return delegateStrike.getGlyphImagePtr(glyphCode);
}
void getGlyphImageBounds(int glyphCode,
Point2D.Float pt, Rectangle result) {
delegateStrike.getGlyphImageBounds(glyphCode, pt, result);
}
Point2D.Float getGlyphMetrics(int glyphCode) {
return delegateStrike.getGlyphMetrics(glyphCode);
}
float getGlyphAdvance(int glyphCode) {
return delegateStrike.getGlyphAdvance(glyphCode);
}
Point2D.Float getCharMetrics(char ch) {
return delegateStrike.getCharMetrics(ch);
}
float getCodePointAdvance(int cp) {
if (cp < 0 || cp >= 0x10000) {
cp = 0xffff;
}
return delegateStrike.getGlyphAdvance(cp);
}
Rectangle2D.Float getGlyphOutlineBounds(int glyphCode) {
return delegateStrike.getGlyphOutlineBounds(glyphCode);
}
GeneralPath getGlyphOutline(int glyphCode, float x, float y) {
return delegateStrike.getGlyphOutline(glyphCode, x, y);
}
GeneralPath getGlyphVectorOutline(int[] glyphs, float x, float y) {
return delegateStrike.getGlyphVectorOutline(glyphs, x, y);
}
}