dorkbox
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Utilities
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Formatting, code polish

This commit is contained in:
nathan 2017-07-01 14:37:41 +02:00
parent 01e5eab0ca
commit 46ae5cbc78
1 changed files with 17 additions and 22 deletions
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39
src/dorkbox/util/FontUtil.java
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@ -24,7 +24,6 @@ import java.awt.GraphicsEnvironment;
import java.awt.RenderingHints; import java.awt.RenderingHints;
import java.awt.font.FontRenderContext; import java.awt.font.FontRenderContext;
import java.awt.font.GlyphVector; import java.awt.font.GlyphVector;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage; import java.awt.image.BufferedImage;
import java.io.IOException; import java.io.IOException;
import java.io.InputStream; import java.io.InputStream;
@ -138,7 +137,8 @@ class FontUtil {
/** /**
* Gets the correct font (in GENERAL) for a specified pixel height. * Gets the correct font for a specified pixel height. This measures the maximum font height possible for the specified font. This
* can be different than the alpha-numeric height.
* *
* @param font the font we are checking * @param font the font we are checking
* @param height the height in pixels we want to get as close as possible to * @param height the height in pixels we want to get as close as possible to
@ -150,44 +150,39 @@ class FontUtil {
Font getFontForSpecificHeight(final Font font, final int height) { Font getFontForSpecificHeight(final Font font, final int height) {
int size = font.getSize(); int size = font.getSize();
Boolean lastAction = null; Boolean lastAction = null;
BufferedImage image = new BufferedImage(1, 1, BufferedImage.TYPE_INT_RGB);
Graphics2D g = image.createGraphics();
while (true) { while (true) {
Font fontCheck = new Font(font.getName(), Font.PLAIN, size); Font fontCheck = new Font(font.getName(), Font.PLAIN, size);
int maxFontHeight = getMaxFontHeight(fontCheck);
FontMetrics metrics = g.getFontMetrics(fontCheck); if (maxFontHeight < height && lastAction != Boolean.FALSE) {
Rectangle2D rect = metrics.getStringBounds("`Tj|┃", g); // `Tj|┃ are glyphs that are at the top/bottom of the fontset (usually)
double testHeight = rect.getHeight();
if (testHeight < height && lastAction != Boolean.FALSE) {
size++; size++;
lastAction = Boolean.TRUE; lastAction = Boolean.TRUE;
} else if (testHeight > height && lastAction != Boolean.TRUE) { } else if (maxFontHeight > height && lastAction != Boolean.TRUE) {
size--; size--;
lastAction = Boolean.FALSE; lastAction = Boolean.FALSE;
} else { } else {
// either we are the exact size, or we are ONE font size to big/small (depending on what our initial guess was) // either we are the exact size, or we are ONE font size to big/small (depending on what our initial guess was)
g.dispose();
return fontCheck; return fontCheck;
} }
} }
} }
/** /**
* Gets the specified font height for a specific string * Gets the specified font height for a specific string, as rendered on the screen.
* *
* @param font the font to use * @param font the font to use for rendering the string
* @param string the string to get the size of * @param string the string used to get the height
* *
* @return the height of the string * @return the height of the string
*/ */
public static public static
int getFontHeight(final Font font, final String string) { int getFontHeight(final Font font, final String string) {
BufferedImage image = new BufferedImage(1, 1, 1); BufferedImage image = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB);
Graphics2D g = image.createGraphics(); Graphics2D g = image.createGraphics();
FontRenderContext frc = g.getFontRenderContext(); FontRenderContext frc = g.getFontRenderContext();
GlyphVector gv = font.createGlyphVector(frc, string); GlyphVector gv = font.createGlyphVector(frc, string);
int height = gv.getPixelBounds(null, 0, 0).height; int height = gv.getPixelBounds(null, 0, 0).height;
g.dispose(); g.dispose();
@ -196,12 +191,12 @@ class FontUtil {
} }
/** /**
* Gets the maximum font height used by alpha-numeric characters ONLY * Gets the maximum font height used by alpha-numeric characters ONLY, as recorded by the font.
*/ */
public static public static
int getAlphaNumbericFontHeight(final Font font) { int getAlphaNumericFontHeight(final Font font) {
// Because font metrics is based on a graphics context, we need to create a small, temporary image to determine the width and height // Because font metrics is based on a graphics context, we need to create a small, temporary image to determine the width and height
BufferedImage image = new BufferedImage(1, 1, BufferedImage.TYPE_INT_RGB); BufferedImage image = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB);
Graphics2D g = image.createGraphics(); Graphics2D g = image.createGraphics();
FontMetrics metrics = g.getFontMetrics(font); FontMetrics metrics = g.getFontMetrics(font);
@ -212,12 +207,12 @@ class FontUtil {
} }
/** /**
* Gets the maximum font height used by of ALL characters. * Gets the maximum font height used by of ALL characters, as recorded by the font.
*/ */
public static public static
int getFontHeight(final Font font) { int getMaxFontHeight(final Font font) {
// Because font metrics is based on a graphics context, we need to create a small, temporary image to determine the width and height // Because font metrics is based on a graphics context, we need to create a small, temporary image to determine the width and height
BufferedImage image = new BufferedImage(1, 1, BufferedImage.TYPE_INT_RGB); BufferedImage image = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB);
Graphics2D g = image.createGraphics(); Graphics2D g = image.createGraphics();
FontMetrics metrics = g.getFontMetrics(font); FontMetrics metrics = g.getFontMetrics(font);