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6961732: FontMetrics.getLeading() may be negative in freetype-based OpenJDK builds

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Fix premature integer roundings to preserve correct height, width and descent values for fonts

Reviewed-by: prr
This commit is contained in:
Mario Torre 2010-06-16 20:46:10 +02:00
parent 599d2d5eaf
commit cb437cbfe4
1 changed files with 10 additions and 9 deletions
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19
jdk/src/share/native/sun/font/freetypeScaler.c
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@ -490,22 +490,23 @@ Java_sun_font_FreetypeFontScaler_getFontMetricsNative(
/* ascent */
ax = 0;
ay = -(jfloat) FT26Dot6ToFloat(
scalerInfo->face->size->metrics.ascender +
bmodifier/2);
ay = -(jfloat) FT26Dot6ToFloat(FT_MulFix(
((jlong) scalerInfo->face->ascender + bmodifier/2),
(jlong) scalerInfo->face->size->metrics.y_scale));
/* descent */
dx = 0;
dy = -(jfloat) FT26Dot6ToFloat(
scalerInfo->face->size->metrics.descender +
bmodifier/2);
dy = -(jfloat) FT26Dot6ToFloat(FT_MulFix(
((jlong) scalerInfo->face->descender + bmodifier/2),
(jlong) scalerInfo->face->size->metrics.y_scale));
/* baseline */
bx = by = 0;
/* leading */
lx = 0;
ly = (jfloat) FT26Dot6ToFloat(
scalerInfo->face->size->metrics.height +
bmodifier) + ay - dy;
ly = (jfloat) FT26Dot6ToFloat(FT_MulFix(
(jlong) scalerInfo->face->height + bmodifier,
(jlong) scalerInfo->face->size->metrics.y_scale))
+ ay - dy;
/* max advance */
mx = (jfloat) FT26Dot6ToFloat(
scalerInfo->face->size->metrics.max_advance +