private boolean canDisplayImpl(char c) {
if (USE_ALTERNATIVE_CAN_DISPLAY_PROCEDURE) {
return myFont.createGlyphVector(DUMMY_CONTEXT, new char[] {c}).getGlyphCode(0) > 0;
} else {
return myFont.canDisplay(c);
}
}
/**
* This deals with a bug/peculiarity for the default Mac font: several pixels of the ascent are
* actually empty. This screws up certain measurements which assume the font is actually a few
* pixels taller than it really is.
*/
private static int getUnusedAscent(FontMetrics fm, Font font) {
Integer value = ascentTable.get(font);
if (value == null) {
int recordedAscent = fm.getAscent();
FontRenderContext frc = new FontRenderContext(new AffineTransform(), false, false);
GlyphVector gv = font.createGlyphVector(frc, "XYZ");
Rectangle2D bounds = ShapeBounds.getBounds(gv.getOutline());
int observedAscent = (int) (Math.ceil(bounds.getHeight()) + .5);
value = new Integer(recordedAscent - observedAscent);
ascentTable.put(font, value);
}
return value.intValue();
}
private Shape generateShapeFromText() {
Font font = new Font(fontFamily, Font.PLAIN, fontSize);
BufferedImage img = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = img.createGraphics();
try {
GlyphVector vect = font.createGlyphVector(g2.getFontRenderContext(), str);
float dispX = x;
float dispY = (float) (y - vect.getVisualBounds().getY());
Shape shape = vect.getOutline(dispX, dispY);
return shape;
} finally {
g2.dispose();
}
}
private static BufferedImage createImage(String s, boolean valid) {
FontRenderContext frc = new FontRenderContext(null, true, true);
Font font = new Font("dialog", Font.BOLD, 12);
GlyphVector glyphs = font.createGlyphVector(frc, s);
Shape shape = glyphs.getOutline();
Rectangle bounds = shape.getBounds();
int imageW = bounds.width;
int imageH = bounds.height;
BufferedImage image = new BufferedImage(imageW, imageH, BufferedImage.TYPE_INT_ARGB);
Graphics2D g = (Graphics2D) image.getGraphics();
g.setColor(valid ? Color.blue : Color.red);
g.translate(bounds.x, -bounds.y);
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
g.fill(shape);
return image;
}
private void parseProblemGlyphs() {
myCheckedForProblemGlyphs = true;
BufferedImage buffer = UIUtil.createImage(20, 20, BufferedImage.TYPE_INT_RGB);
final Graphics graphics = buffer.getGraphics();
if (!(graphics instanceof Graphics2D)) {
return;
}
final FontRenderContext context = ((Graphics2D) graphics).getFontRenderContext();
char[] charBuffer = new char[1];
for (char c = 0; c < 128; c++) {
if (!myFont.canDisplay(c)) {
continue;
}
charBuffer[0] = c;
final GlyphVector vector = myFont.createGlyphVector(context, charBuffer);
final float y = vector.getGlyphMetrics(0).getAdvanceY();
if (Math.round(y) != 0) {
mySymbolsToBreakDrawingIteration.add(c);
}
}
myHasGlyphsToBreakDrawingIteration = !mySymbolsToBreakDrawingIteration.isEmpty();
}
