Examples of java.awt.font.GlyphMetrics

java.awt.font.GlyphMetrics
The GlyphMetrics class represents infomation for a single glyph. A glyph is the visual representation of one or more characters. Many different glyphs can be used to represent a single character or combination of characters. GlyphMetrics instances are produced by {@link java.awt.Font Font} and are applicable to a specific glyph in a particular Font.
Glyphs are either STANDARD, LIGATURE, COMBINING, or COMPONENT.
- STANDARD glyphs are commonly used to represent single characters.
- LIGATURE glyphs are used to represent sequences of characters.
- COMPONENT glyphs in a {@link GlyphVector} do not correspond to aparticular character in a text model. Instead, COMPONENT glyphs are added for typographical reasons, such as Arabic justification.
- COMBINING glyphs embellish STANDARD or LIGATURE glyphs, such as accent marks. Carets do not appear before COMBINING glyphs.
Other metrics available through GlyphMetrics are the components of the advance, the visual bounds, and the left and right side bearings.
Glyphs for a rotated font, or obtained from a GlyphVector which has applied a rotation to the glyph, can have advances that contain both X and Y components. Usually the advance only has one component.
The advance of a glyph is the distance from the glyph's origin to the origin of the next glyph along the baseline, which is either vertical or horizontal. Note that, in a GlyphVector, the distance from a glyph to its following glyph might not be the glyph's advance, because of kerning or other positioning adjustments.
The bounds is the smallest rectangle that completely contains the outline of the glyph. The bounds rectangle is relative to the glyph's origin. The left-side bearing is the distance from the glyph origin to the left of its bounds rectangle. If the left-side bearing is negative, part of the glyph is drawn to the left of its origin. The right-side bearing is the distance from the right side of the bounds rectangle to the next glyph origin (the origin plus the advance). If negative, part of the glyph is drawn to the right of the next glyph's origin. Note that the bounds does not necessarily enclose all the pixels affected when rendering the glyph, because of rasterization and pixel adjustment effects.
Although instances of GlyphMetrics can be directly constructed, they are almost always obtained from a GlyphVector. Once constructed, GlyphMetrics objects are immutable.
Example:
Querying a Font for glyph information
```
 Font font = ...; int glyphIndex = ...; GlyphMetrics metrics = GlyphVector.getGlyphMetrics(glyphIndex); int isStandard = metrics.isStandard(); float glyphAdvance = metrics.getAdvance(); 
```
@see java.awt.Font @see GlyphVector


  // iterate through the GlyphVector placing each glyph


  for (int i = 0; i < glyphs.getNumGlyphs(); i++) {
      
      GlyphMetrics gm = glyphs.getGlyphMetrics(i);


      float charAdvance = gm.getAdvance();


      Shape glyph = glyphs.getGlyphOutline(i);


      // if lengthAdjust was GLYPHS, then scale the glyph
      // by the lengthRatio in the X direction

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            int advance = 0;


            GlyphVector gv = font.createGlyphVector(frc, new char[]{referenceChar});
            java.awt.Shape glyphOutline = gv.getGlyphOutline(0);


            GlyphMetrics metrics = gv.getGlyphMetrics(0);
            advance = (int)Math.rint(metrics.getAdvance()); //Do not scale here, DefineText needs values unscaled


            java.awt.Shape scaledShape = scaleTransform.createTransformedShape(glyphOutline);
            swfShape = createGlyphShape(scaledShape);


            GlyphEntry ge = new GlyphEntry();

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    // xOffset and xAdvance will be incorrect for unicode characters such as combining marks or non-spacing characters
    // (eg Pnujabi's "\u0A1C\u0A47") that require the context of surrounding glyphs to determine spacing, but thisis the
    // best we can do with the BMFont format.
    char[] chars = Character.toChars(codePoint);
    GlyphVector vector = font.layoutGlyphVector(GlyphPage.renderContext, chars, 0, chars.length, Font.LAYOUT_LEFT_TO_RIGHT);
    GlyphMetrics metrics = vector.getGlyphMetrics(0);
    int xOffset = vector.getGlyphPixelBounds(0, GlyphPage.renderContext, 0.5f, 0).x - unicodeFont.getPaddingLeft();
    int xAdvance = (int)(metrics.getAdvanceX() + unicodeFont.getPaddingAdvanceX() + unicodeFont.getPaddingLeft() + unicodeFont
      .getPaddingRight());
    return new int[] {xOffset, xAdvance};
  }

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  private Texture texture;


  Glyph (int codePoint, Rectangle bounds, GlyphVector vector, int index, UnicodeFont unicodeFont) {
    this.codePoint = codePoint;


    GlyphMetrics metrics = vector.getGlyphMetrics(index);
    int lsb = (int)metrics.getLSB();
    if (lsb > 0) lsb = 0;
    int rsb = (int)metrics.getRSB();
    if (rsb > 0) rsb = 0;


    int glyphWidth = bounds.width - lsb - rsb;
    int glyphHeight = bounds.height;
    if (glyphWidth > 0 && glyphHeight > 0) {

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  // iterate through the GlyphVector placing each glyph


  for (int i = 0; i < glyphs.getNumGlyphs(); i++) {
      
      GlyphMetrics gm = glyphs.getGlyphMetrics(i);


      float charAdvance = gm.getAdvance();


      Shape glyph = glyphs.getGlyphOutline(i);


      // if lengthAdjust was GLYPHS, then scale the glyph
      // by the lengthRatio in the X direction

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        GVTLineMetrics lineMetrics = gvtFont.getLineMetrics
            ("By", awtGlyphVector.getFontRenderContext());
        float ascent = lineMetrics.getAscent() * scaleFactor;
        float descent = lineMetrics.getDescent() * scaleFactor;


        GlyphMetrics gm = awtGlyphVector.getGlyphMetrics(glyphIndex);


        Rectangle2D gmBounds = gm.getBounds2D();


        Rectangle2D bounds = 
            new Rectangle2D.Double(gmBounds.getX() * scaleFactor, 
                                   gmBounds.getY() * scaleFactor,
                                   gmBounds.getWidth() * scaleFactor, 
                                   gmBounds.getHeight() * scaleFactor);


        return new GVTGlyphMetrics(gm.getAdvance()*scaleFactor, 
                                   (ascent+descent), 
                                   bounds, 
                                   GlyphMetrics.STANDARD);
    }

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            // if c is a transparent arabic char then need to shift the
            // following glyphs left so that the current glyph is overwritten
            char c = ci.setIndex(i + ci.getBeginIndex());
            if (ArabicTextHandler.arabicCharTransparent(c)) {
                GlyphMetrics gm = awtGlyphVector.getGlyphMetrics(i);
                shiftLeft = gm.getAdvance();
            }
        }
    }

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     */
    public GVTGlyphMetrics(float horizontalAdvance, 
         float verticalAdvance,
                           Rectangle2D bounds, 
         byte glyphType) {
        this.gm = new GlyphMetrics(horizontalAdvance, bounds, glyphType);
        this.verticalAdvance = verticalAdvance;
    }

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        Point2D pos = getGlyphPosition( glyphIndex );
        bounds.setRect( bounds.getX() - pos.getX(), bounds.getY()- pos.getY(), bounds.getWidth(), bounds.getHeight() );


        Point2D.Float advance = strike.getGlyphMetrics( glyphs.charAt( glyphIndex ) );


        return new GlyphMetrics( true, advance.x, advance.y, bounds, (byte)0 );
    }

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                xform.rotate(rotate[Math.min(i, rotate.length - 1)]);
            }


            String unicode = text.substring(i, i + 1);
            Shape glyphOutline = textVector.getGlyphOutline(i);
            GlyphMetrics glyphMetrics = textVector.getGlyphMetrics(i);


            glyphOutline = xform.createTransformedShape(glyphOutline);
            addShape.append(glyphOutline, false);


            if (x != null && posPtr < x.length)

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