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6927458: font system should cache transient strikes with weak references

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Reviewed-by: igor, jgodinez
This commit is contained in:
Phil Race 2010-12-23 21:58:12 -08:00
parent 45f02b1cb5
commit 5119e6d87a
1 changed files with 15 additions and 1 deletions

16
jdk/src/share/classes/sun/font/Font2D.java

@ -343,7 +343,21 @@ public abstract class Font2D {
}
strike = createStrike(desc);
//StrikeCache.addStrike();
strikeRef = StrikeCache.getStrikeRef(strike);
/* If we are creating many strikes on this font which
* involve non-quadrant rotations, or more general
* transforms which include shears, then force the use
* of weak references rather than soft references.
* This means that it won't live much beyond the next GC,
* which is what we want for what is likely a transient strike.
*/
int txType = desc.glyphTx.getType();
if (txType == AffineTransform.TYPE_GENERAL_TRANSFORM ||
(txType & AffineTransform.TYPE_GENERAL_ROTATION) != 0 &&
strikeCache.size() > 10) {
strikeRef = StrikeCache.getStrikeRef(strike, true);
} else {
strikeRef = StrikeCache.getStrikeRef(strike);
}
strikeCache.put(desc, strikeRef);
//strike.lastlookupTime = System.currentTimeMillis();
lastFontStrike = new SoftReference(strike);