Examples of java.awt.font.FontRenderContext

java.awt.font.FontRenderContext
The FontRenderContext class is a container for the information needed to correctly measure text. The measurement of text can vary because of rules that map outlines to pixels, and rendering hints provided by an application.
One such piece of information is a transform that scales typographical points to pixels. (A point is defined to be exactly 1/72 of an inch, which is slightly different than the traditional mechanical measurement of a point.) A character that is rendered at 12pt on a 600dpi device might have a different size than the same character rendered at 12pt on a 72dpi device because of such factors as rounding to pixel boundaries and hints that the font designer may have specified.
Anti-aliasing and Fractional-metrics specified by an application can also affect the size of a character because of rounding to pixel boundaries.
Typically, instances of FontRenderContext are obtained from a {@link java.awt.Graphics2D Graphics2D} object. AFontRenderContext which is directly constructed will most likely not represent any actual graphics device, and may lead to unexpected or incorrect results.
@see java.awt.RenderingHints#KEY_TEXT_ANTIALIASING @see java.awt.RenderingHints#KEY_FRACTIONALMETRICS @see java.awt.Graphics2D#getFontRenderContext() @see java.awt.font.LineMetrics

    g.drawString(text, x0, y0);
  }
  
  private void computeDimensions(Graphics g, Font font, FontMetrics fm) {
    String s = text;
    FontRenderContext frc = ((Graphics2D) g).getFontRenderContext();
    width = fm.stringWidth(s);
    ascent = fm.getAscent();
    descent = fm.getDescent();
    int[] xs = new int[s.length()];
    int[] ys = new int[s.length()];

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  }


  public static void testFont ()
  {
    Font font = new Font ("Coronet", Font.ITALIC, 80); //$NON-NLS-1$
    FontRenderContext frc = new FontRenderContext(null, true, true);
    char[] chars = new char[('z' - 'a')];
    double[] charW = new double[chars.length];


    for (int i = 0; i < chars.length; i++)
    {

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                if (bounds.getMaxY() > maxY)
                    maxY = bounds.getMaxY();
            }
            
            if (text != null && text.length() > 0) {
                FontRenderContext context = g2.getFontRenderContext();
                TextLayout layout = new TextLayout(text, getFont(), context);
                Rectangle2D bounds = layout.getBounds();
                g2.setColor(getForeground());
                layout.draw(g2, (float) (width - bounds.getWidth()) / 2,
                        (float) (maxY + layout.getLeading() + 2 * layout.getAscent()));

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  {
    final boolean antialias = RenderingHints.VALUE_TEXT_ANTIALIAS_ON.equals(getRenderingHint(
        RenderingHints.KEY_TEXT_ANTIALIASING));
    final boolean fractions = RenderingHints.VALUE_FRACTIONALMETRICS_ON.equals(getRenderingHint(
        RenderingHints.KEY_FRACTIONALMETRICS));
    return new FontRenderContext(new AffineTransform(), antialias, fractions);
  }

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    }
    g2.translate(-x, -y);
    x += b.getWidth() / 2.0 + 3.0;
    g2.setFont(this.font);


    final FontRenderContext frc = g2.getFontRenderContext();
    final Font f = g2.getFont();
//    final FontMetrics fm = g2.getFontMetrics(f);
    final LineMetrics metrics = f.getLineMetrics(label, frc);
    final float ascent = metrics.getAscent();
    final float halfAscent = ascent / 2.0f;

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    void compute() {
        float lt1;
        float ln1;
        float lt2;
        float ln2;
        FontRenderContext frc = new FontRenderContext(new AffineTransform(), true, true);
        gv = font.createGlyphVector(frc, str);
        Rectangle2D r = gv.getLogicalBounds();
        w = r.getWidth();
        angle = 0;
        int nseg = llpoints.length / 2 - 1;

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    protected void renderString(Graphics g, String string, int x, int y) {
        if (g instanceof Graphics2D) {
            Graphics2D g2 = (Graphics2D) g;
            if (getTextMatteColor() != null) {
                FontRenderContext context = g2.getFontRenderContext();
                GlyphVector glyphVector = g2.getFont()
                        .createGlyphVector(context, string);
                Shape outline = glyphVector.getOutline();
                g2.translate(x, y);
                g2.setStroke(getTextMatteStroke());

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   * @see Graphics2D#getFontRenderContext()
   */
  public FontRenderContext getFontRenderContext() {
      boolean antialias = RenderingHints.VALUE_TEXT_ANTIALIAS_ON.equals(getRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING));
      boolean fractions = RenderingHints.VALUE_FRACTIONALMETRICS_ON.equals(getRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS));
      return new FontRenderContext(new AffineTransform(), antialias, fractions);
  }

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      g2.setFont(new Font(fontName, style, fontSize));
    }


    final Font f = g2.getFont();
    final FontMetrics fm = g2.getFontMetrics(f);
    final FontRenderContext frc = g2.getFontRenderContext();
    final double y = area.getCenterY();


    final int highest = getHighest();
    for (int i = getLowest(); i <= highest; i++)
    {

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    if (lineStartPos == endPos)
    {
      return 0;
    }


    final FontRenderContext frc = DefaultSizeCalculator.getFrcDetector().createFontRenderContext();


    if (chars.length < text.length())
    {
      chars = new char[Math.max(chars.length + 100, text.length())];
    }

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