下面列出了怎么用sun.font.FontScaler的API类实例代码及写法，或者点击链接到github查看源代码。
public static void main(String[] args) throws Exception
{
// The bug only happens with Type 1 fonts. The Ghostscript font files
// should be commonly available. From distro pacakge or
// ftp://ftp.gnu.org/gnu/ghostscript/gnu-gs-fonts-other-6.0.tar.gz
// Pass pfa/pfb font file as argument
String path = args[0];
// Load
InputStream stream = new FileInputStream(path);
Font font = Font.createFont(Font.TYPE1_FONT,stream);
// Ensure native bits have been generated
BufferedImage img = new BufferedImage(100,100,
BufferedImage.TYPE_INT_ARGB);
Graphics2D g2d = img.createGraphics();
FontRenderContext frc = g2d.getFontRenderContext();
font.getLineMetrics("derp",frc);
// Force disposal -
// System.gc() is not sufficient.
Field font2DHandleField = Font.class.getDeclaredField("font2DHandle");
font2DHandleField.setAccessible(true);
sun.font.Font2DHandle font2DHandle =
(sun.font.Font2DHandle)font2DHandleField.get(font);
sun.font.Font2D font2D = font2DHandle.font2D;
sun.font.Type1Font type1Font = (sun.font.Type1Font)font2D;
Method getScalerMethod =
sun.font.Type1Font.class.getDeclaredMethod("getScaler");
getScalerMethod.setAccessible(true);
sun.font.FontScaler scaler =
(sun.font.FontScaler)getScalerMethod.invoke(type1Font);
// dispose should not crash due to double free
scaler.dispose();
}
public static void main(String[] args) throws Exception
{
// The bug only happens with Type 1 fonts. The Ghostscript font files
// should be commonly available. From distro pacakge or
// ftp://ftp.gnu.org/gnu/ghostscript/gnu-gs-fonts-other-6.0.tar.gz
// Pass pfa/pfb font file as argument
String path = args[0];
// Load
InputStream stream = new FileInputStream(path);
Font font = Font.createFont(Font.TYPE1_FONT,stream);
// Ensure native bits have been generated
BufferedImage img = new BufferedImage(100,100,
BufferedImage.TYPE_INT_ARGB);
Graphics2D g2d = img.createGraphics();
FontRenderContext frc = g2d.getFontRenderContext();
font.getLineMetrics("derp",frc);
// Force disposal -
// System.gc() is not sufficient.
Field font2DHandleField = Font.class.getDeclaredField("font2DHandle");
font2DHandleField.setAccessible(true);
sun.font.Font2DHandle font2DHandle =
(sun.font.Font2DHandle)font2DHandleField.get(font);
sun.font.Font2D font2D = font2DHandle.font2D;
sun.font.Type1Font type1Font = (sun.font.Type1Font)font2D;
Method getScalerMethod =
sun.font.Type1Font.class.getDeclaredMethod("getScaler");
getScalerMethod.setAccessible(true);
sun.font.FontScaler scaler =
(sun.font.FontScaler)getScalerMethod.invoke(type1Font);
// dispose should not crash due to double free
scaler.dispose();
}
public static void main(String[] args) throws Exception
{
// The bug only happens with Type 1 fonts. The Ghostscript font files
// should be commonly available. From distro pacakge or
// ftp://ftp.gnu.org/gnu/ghostscript/gnu-gs-fonts-other-6.0.tar.gz
// Pass pfa/pfb font file as argument
String path = args[0];
// Load
InputStream stream = new FileInputStream(path);
Font font = Font.createFont(Font.TYPE1_FONT,stream);
// Ensure native bits have been generated
BufferedImage img = new BufferedImage(100,100,
BufferedImage.TYPE_INT_ARGB);
Graphics2D g2d = img.createGraphics();
FontRenderContext frc = g2d.getFontRenderContext();
font.getLineMetrics("derp",frc);
// Force disposal -
// System.gc() is not sufficient.
Field font2DHandleField = Font.class.getDeclaredField("font2DHandle");
font2DHandleField.setAccessible(true);
sun.font.Font2DHandle font2DHandle =
(sun.font.Font2DHandle)font2DHandleField.get(font);
sun.font.Font2D font2D = font2DHandle.font2D;
sun.font.Type1Font type1Font = (sun.font.Type1Font)font2D;
Method getScalerMethod =
sun.font.Type1Font.class.getDeclaredMethod("getScaler");
getScalerMethod.setAccessible(true);
sun.font.FontScaler scaler =
(sun.font.FontScaler)getScalerMethod.invoke(type1Font);
// dispose should not crash due to double free
scaler.dispose();
}
public static void main(String[] args) throws Exception
{
// The bug only happens with Type 1 fonts. The Ghostscript font files
// should be commonly available. From distro pacakge or
// ftp://ftp.gnu.org/gnu/ghostscript/gnu-gs-fonts-other-6.0.tar.gz
// Pass pfa/pfb font file as argument
String path = args[0];
// Load
InputStream stream = new FileInputStream(path);
Font font = Font.createFont(Font.TYPE1_FONT,stream);
// Ensure native bits have been generated
BufferedImage img = new BufferedImage(100,100,
BufferedImage.TYPE_INT_ARGB);
Graphics2D g2d = img.createGraphics();
FontRenderContext frc = g2d.getFontRenderContext();
font.getLineMetrics("derp",frc);
// Force disposal -
// System.gc() is not sufficient.
Field font2DHandleField = Font.class.getDeclaredField("font2DHandle");
font2DHandleField.setAccessible(true);
sun.font.Font2DHandle font2DHandle =
(sun.font.Font2DHandle)font2DHandleField.get(font);
sun.font.Font2D font2D = font2DHandle.font2D;
sun.font.Type1Font type1Font = (sun.font.Type1Font)font2D;
Method getScalerMethod =
sun.font.Type1Font.class.getDeclaredMethod("getScaler");
getScalerMethod.setAccessible(true);
sun.font.FontScaler scaler =
(sun.font.FontScaler)getScalerMethod.invoke(type1Font);
// dispose should not crash due to double free
scaler.dispose();
}
public static void main(String[] args) throws Exception
{
// The bug only happens with Type 1 fonts. The Ghostscript font files
// should be commonly available. From distro pacakge or
// ftp://ftp.gnu.org/gnu/ghostscript/gnu-gs-fonts-other-6.0.tar.gz
// Pass pfa/pfb font file as argument
String path = args[0];
// Load
InputStream stream = new FileInputStream(path);
Font font = Font.createFont(Font.TYPE1_FONT,stream);
// Ensure native bits have been generated
BufferedImage img = new BufferedImage(100,100,
BufferedImage.TYPE_INT_ARGB);
Graphics2D g2d = img.createGraphics();
FontRenderContext frc = g2d.getFontRenderContext();
font.getLineMetrics("derp",frc);
// Force disposal -
// System.gc() is not sufficient.
Field font2DHandleField = Font.class.getDeclaredField("font2DHandle");
font2DHandleField.setAccessible(true);
sun.font.Font2DHandle font2DHandle =
(sun.font.Font2DHandle)font2DHandleField.get(font);
sun.font.Font2D font2D = font2DHandle.font2D;
sun.font.Type1Font type1Font = (sun.font.Type1Font)font2D;
Method getScalerMethod =
sun.font.Type1Font.class.getDeclaredMethod("getScaler");
getScalerMethod.setAccessible(true);
sun.font.FontScaler scaler =
(sun.font.FontScaler)getScalerMethod.invoke(type1Font);
// dispose should not crash due to double free
scaler.dispose();
}