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The main purpose of this libraryis to modernize and maintain the slick2D library.
The newest version!
package com.github.mathiewz.slick;
import java.awt.Font;
import java.awt.FontFormatException;
import java.awt.FontMetrics;
import java.awt.Rectangle;
import java.awt.font.GlyphVector;
import java.awt.font.TextAttribute;
import java.io.IOException;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import org.lwjgl.opengl.GL11;
import com.github.mathiewz.slick.font.Glyph;
import com.github.mathiewz.slick.font.GlyphPage;
import com.github.mathiewz.slick.font.HieroSettings;
import com.github.mathiewz.slick.font.effects.Effect;
import com.github.mathiewz.slick.opengl.Texture;
import com.github.mathiewz.slick.opengl.TextureImpl;
import com.github.mathiewz.slick.opengl.renderer.Renderer;
import com.github.mathiewz.slick.opengl.renderer.SGL;
import com.github.mathiewz.slick.util.ResourceLoader;
/**
* A Slick bitmap font that can display unicode glyphs from a TrueTypeFont.
*
* For efficiency, glyphs are packed on to textures. Glyphs can be loaded to the textures on the fly, when they are first needed
* for display. However, it is best to load the glyphs that are known to be needed at startup.
*
* @author Nathan Sweet
*/
public class UnicodeFont implements com.github.mathiewz.slick.Font {
/** The number of display lists that will be cached for strings from this font */
private static final int DISPLAY_LIST_CACHE_SIZE = 200;
/** The highest glyph code allowed */
static private final int MAX_GLYPH_CODE = 0x10FFFF;
/** The number of glyphs on a page */
private static final int PAGE_SIZE = 512;
/** The number of pages */
private static final int PAGES = MAX_GLYPH_CODE / PAGE_SIZE;
/** Interface to OpenGL */
private static final SGL GL = Renderer.get();
/** A dummy display list used as a place holder */
private static final DisplayList EMPTY_DISPLAY_LIST = new DisplayList();
/**
* Utility to create a Java font for a TTF file reference
*
* @param ttfFileRef
* The file system or classpath location of the TrueTypeFont file.
* @return The font created
*/
private static Font createFont(String ttfFileRef) {
try {
return Font.createFont(Font.TRUETYPE_FONT, ResourceLoader.getResourceAsStream(ttfFileRef));
} catch (FontFormatException ex) {
throw new SlickException("Invalid font: " + ttfFileRef, ex);
} catch (IOException ex) {
throw new SlickException("Error reading font: " + ttfFileRef, ex);
}
}
/**
* Sorts glyphs by height, tallest first.
*/
private static final Comparator heightComparator = (o1, o2) -> o1.getHeight() - o2.getHeight();
/** The AWT font that is being rendered */
private Font font;
/** The reference to the True Type Font file that has kerning information */
private String ttfFileRef;
/** The ascent of the font */
private int ascent;
/** The decent of the font */
private int descent;
/** The leading edge of the font */
private int leading;
/** The width of a space for the font */
private int spaceWidth;
/** The glyphs that are available in this font */
private final Glyph[][] glyphs = new Glyph[PAGES][];
/** The pages that have been loaded for this font */
private final List glyphPages = new ArrayList<>();
/** The glyphs queued up to be rendered */
private final List queuedGlyphs = new ArrayList<>(256);
/** The effects that need to be applied to the font */
private final List effects = new ArrayList<>();
/** The padding applied in pixels to the top of the glyph rendered area */
private int paddingTop;
/** The padding applied in pixels to the left of the glyph rendered area */
private int paddingLeft;
/** The padding applied in pixels to the bottom of the glyph rendered area */
private int paddingBottom;
/** The padding applied in pixels to the right of the glyph rendered area */
private int paddingRight;
/** The padding applied in pixels to horizontal advance for each glyph */
private int paddingAdvanceX;
/** The padding applied in pixels to vertical advance for each glyph */
private int paddingAdvanceY;
/** The glyph to display for missing glyphs in code points */
private Glyph missingGlyph;
/** The width of the glyph page generated */
private int glyphPageWidth = 512;
/** The height of the glyph page generated */
private int glyphPageHeight = 512;
/** True if display list caching is turned on */
private boolean displayListCaching = true;
/** The based display list ID */
private int baseDisplayListID = -1;
/** The ID of the display list that has been around the longest time */
private int eldestDisplayListID;
/** The map fo the display list generated and cached - modified to allow removal of the oldest entry */
private final LinkedHashMap displayLists = new LinkedHashMap(DISPLAY_LIST_CACHE_SIZE, 1, true) {
@Override
protected boolean removeEldestEntry(Entry eldest) {
DisplayList displayList = eldest.getValue();
if (displayList != null) {
eldestDisplayListID = displayList.id;
}
return size() > DISPLAY_LIST_CACHE_SIZE;
}
};
/**
* Create a new unicode font based on a TTF file
*
* @param ttfFileRef
* The file system or classpath location of the TrueTypeFont file.
* @param hieroFileRef
* The file system or classpath location of the Hiero settings file.
*/
public UnicodeFont(String ttfFileRef, String hieroFileRef) {
this(ttfFileRef, new HieroSettings(hieroFileRef));
}
/**
* Create a new unicode font based on a TTF file and a set of heiro configuration
*
* @param ttfFileRef
* The file system or classpath location of the TrueTypeFont file.
* @param settings
* The settings configured via the Hiero tool
*/
public UnicodeFont(String ttfFileRef, HieroSettings settings) {
this.ttfFileRef = ttfFileRef;
Font font = createFont(ttfFileRef);
initializeFont(font, settings.getFontSize(), settings.isBold(), settings.isItalic());
loadSettings(settings);
}
/**
* Create a new unicode font based on a TTF file alone
*
* @param ttfFileRef
* The file system or classpath location of the TrueTypeFont file.
* @param size
* The point size of the font to generated
* @param bold
* True if the font should be rendered in bold typeface
* @param italic
* True if the font should be rendered in bold typeface
*/
public UnicodeFont(String ttfFileRef, int size, boolean bold, boolean italic) {
this.ttfFileRef = ttfFileRef;
initializeFont(createFont(ttfFileRef), size, bold, italic);
}
/**
* Creates a new UnicodeFont.
*
* @param font
* The AWT font to render
* @param hieroFileRef
* The file system or classpath location of the Hiero settings file.
*/
public UnicodeFont(Font font, String hieroFileRef) {
this(font, new HieroSettings(hieroFileRef));
}
/**
* Creates a new UnicodeFont.
*
* @param font
* The AWT font to render
* @param settings
* The settings configured via the Hiero tool
*/
public UnicodeFont(Font font, HieroSettings settings) {
initializeFont(font, settings.getFontSize(), settings.isBold(), settings.isItalic());
loadSettings(settings);
}
/**
* Creates a new UnicodeFont.
*
* @param font
* The AWT font to render
*/
public UnicodeFont(Font font) {
initializeFont(font, font.getSize(), font.isBold(), font.isItalic());
}
/**
* Creates a new UnicodeFont.
*
* @param font
* The AWT font to render
* @param size
* The point size of the font to generated
* @param bold
* True if the font should be rendered in bold typeface
* @param italic
* True if the font should be rendered in bold typeface
*/
public UnicodeFont(Font font, int size, boolean bold, boolean italic) {
initializeFont(font, size, bold, italic);
}
/**
* Initialise the font to be used based on configuration
*
* @param baseFont
* The AWT font to render
* @param size
* The point size of the font to generated
* @param bold
* True if the font should be rendered in bold typeface
* @param italic
* True if the font should be rendered in bold typeface
*/
@SuppressWarnings("unchecked")
private void initializeFont(Font baseFont, int size, boolean bold, boolean italic) {
@SuppressWarnings("rawtypes")
Map attributes = baseFont.getAttributes();
attributes.put(TextAttribute.SIZE, new Float(size));
attributes.put(TextAttribute.WEIGHT, bold ? TextAttribute.WEIGHT_BOLD : TextAttribute.WEIGHT_REGULAR);
attributes.put(TextAttribute.POSTURE, italic ? TextAttribute.POSTURE_OBLIQUE : TextAttribute.POSTURE_REGULAR);
try {
attributes.put(TextAttribute.KERNING, TextAttribute.KERNING_ON);
} catch (Exception ignored) {
}
font = baseFont.deriveFont(attributes);
FontMetrics metrics = GlyphPage.getScratchGraphics().getFontMetrics(font);
ascent = metrics.getAscent();
descent = metrics.getDescent();
leading = metrics.getLeading();
// Determine width of space glyph (getGlyphPixelBounds gives a width of zero).
char[] chars = " ".toCharArray();
GlyphVector vector = font.layoutGlyphVector(GlyphPage.RENDER_CONTEXT, chars, 0, chars.length, Font.LAYOUT_LEFT_TO_RIGHT);
spaceWidth = vector.getGlyphLogicalBounds(0).getBounds().width;
}
/**
* Load the hiero setting and configure the unicode font's rendering
*
* @param settings
* The settings to be applied
*/
private void loadSettings(HieroSettings settings) {
paddingTop = settings.getPaddingTop();
paddingLeft = settings.getPaddingLeft();
paddingBottom = settings.getPaddingBottom();
paddingRight = settings.getPaddingRight();
paddingAdvanceX = settings.getPaddingAdvanceX();
paddingAdvanceY = settings.getPaddingAdvanceY();
glyphPageWidth = settings.getGlyphPageWidth();
glyphPageHeight = settings.getGlyphPageHeight();
effects.addAll(settings.getEffects());
}
/**
* Queues the glyphs in the specified codepoint range (inclusive) to be loaded. Note that the glyphs are not actually loaded
* until {@link #loadGlyphs()} is called.
*
* Some characters like combining marks and non-spacing marks can only be rendered with the context of other glyphs. In this
* case, use {@link #addGlyphs(String)}.
*
* @param startCodePoint
* The code point of the first glyph to add
* @param endCodePoint
* The code point of the last glyph to add
*/
public void addGlyphs(int startCodePoint, int endCodePoint) {
for (int codePoint = startCodePoint; codePoint <= endCodePoint; codePoint++) {
addGlyphs(new String(Character.toChars(codePoint)));
}
}
/**
* Queues the glyphs in the specified text to be loaded. Note that the glyphs are not actually loaded until
* {@link #loadGlyphs()} is called.
*
* @param text
* The text containing the glyphs to be added
*/
public void addGlyphs(String text) {
if (text == null) {
throw new IllegalArgumentException("text cannot be null.");
}
char[] chars = text.toCharArray();
GlyphVector vector = font.layoutGlyphVector(GlyphPage.RENDER_CONTEXT, chars, 0, chars.length, Font.LAYOUT_LEFT_TO_RIGHT);
for (int i = 0, n = vector.getNumGlyphs(); i < n; i++) {
int codePoint = text.codePointAt(vector.getGlyphCharIndex(i));
Rectangle bounds = getGlyphBounds(vector, i, codePoint);
getGlyph(vector.getGlyphCode(i), codePoint, bounds, vector, i);
}
}
/**
* Queues the glyphs in the ASCII character set (codepoints 32 through 255) to be loaded. Note that the glyphs are not actually
* loaded until {@link #loadGlyphs()} is called.
*/
public void addAsciiGlyphs() {
addGlyphs(32, 255);
}
/**
* Queues the glyphs in the NEHE character set (codepoints 32 through 128) to be loaded. Note that the glyphs are not actually
* loaded until {@link #loadGlyphs()} is called.
*/
public void addNeheGlyphs() {
addGlyphs(32, 32 + 96);
}
/**
* Loads all queued glyphs to the backing textures. Glyphs that are typically displayed together should be added and loaded at
* the same time so that they are stored on the same backing texture. This reduces the number of backing texture binds required
* to draw glyphs.
*
* @return True if the glyphs were loaded entirely
*/
public boolean loadGlyphs() {
return loadGlyphs(-1);
}
/**
* Loads up to the specified number of queued glyphs to the backing textures. This is typically called from the game loop to
* load glyphs on the fly that were requested for display but have not yet been loaded.
*
* @param maxGlyphsToLoad
* The maximum number of glyphs to be loaded this time
* @return True if the glyphs were loaded entirely
*/
public boolean loadGlyphs(int maxGlyphsToLoad) {
if (queuedGlyphs.isEmpty()) {
return false;
}
if (effects.isEmpty()) {
throw new IllegalStateException("The UnicodeFont must have at least one effect before any glyphs can be loaded.");
}
for (Iterator iter = queuedGlyphs.iterator(); iter.hasNext();) {
Glyph glyph = iter.next();
int codePoint = glyph.getCodePoint();
// Don't load an image for a glyph with nothing to display.
if (glyph.getWidth() == 0 || codePoint == ' ') {
iter.remove();
continue;
}
// Only load the first missing glyph.
if (glyph.isMissing()) {
if (missingGlyph != null) {
if (glyph != missingGlyph) {
iter.remove();
}
continue;
}
missingGlyph = glyph;
}
}
Collections.sort(queuedGlyphs, heightComparator);
// Add to existing pages.
for (GlyphPage glyphPage2 : glyphPages) {
GlyphPage glyphPage = glyphPage2;
maxGlyphsToLoad -= glyphPage.loadGlyphs(queuedGlyphs, maxGlyphsToLoad);
if (maxGlyphsToLoad == 0 || queuedGlyphs.isEmpty()) {
return true;
}
}
// Add to new pages.
while (!queuedGlyphs.isEmpty()) {
GlyphPage glyphPage = new GlyphPage(this, glyphPageWidth, glyphPageHeight);
glyphPages.add(glyphPage);
maxGlyphsToLoad -= glyphPage.loadGlyphs(queuedGlyphs, maxGlyphsToLoad);
if (maxGlyphsToLoad == 0) {
return true;
}
}
return true;
}
/**
* Clears all loaded and queued glyphs.
*/
public void clearGlyphs() {
for (int i = 0; i < PAGES; i++) {
glyphs[i] = null;
}
for (GlyphPage glyphPage : glyphPages) {
GlyphPage page = glyphPage;
try {
page.getImage().destroy();
} catch (SlickException ignored) {
}
}
glyphPages.clear();
if (baseDisplayListID != -1) {
GL.glDeleteLists(baseDisplayListID, displayLists.size());
baseDisplayListID = -1;
}
queuedGlyphs.clear();
missingGlyph = null;
}
/**
* Releases all resources used by this UnicodeFont. This method should be called when this UnicodeFont instance is no longer
* needed.
*/
public void destroy() {
// The destroy() method is just to provide a consistent API for releasing resources.
clearGlyphs();
}
/**
* Identical to {@link #drawString(float, float, String, Color, int, int)} but returns a
* DisplayList which provides access to the width and height of the text drawn.
*
* @param text
* The text to render
* @param x
* The horizontal location to render at
* @param y
* The vertical location to render at
* @param color
* The colour to apply as a filter on the text
* @param startIndex
* The start index into the string to start rendering at
* @param endIndex
* The end index into the string to render to
* @return The reference to the display list that was drawn and potentiall ygenerated
*/
public DisplayList drawDisplayList(float x, float y, String text, Color color, int startIndex, int endIndex) {
if (text == null) {
throw new IllegalArgumentException("text cannot be null.");
}
if (text.length() == 0) {
return EMPTY_DISPLAY_LIST;
}
if (color == null) {
throw new IllegalArgumentException("color cannot be null.");
}
x -= paddingLeft;
y -= paddingTop;
String displayListKey = text.substring(startIndex, endIndex);
color.bind();
TextureImpl.bindNone();
DisplayList displayList = null;
if (displayListCaching && queuedGlyphs.isEmpty()) {
if (baseDisplayListID == -1) {
baseDisplayListID = GL.glGenLists(DISPLAY_LIST_CACHE_SIZE);
if (baseDisplayListID == 0) {
baseDisplayListID = -1;
displayListCaching = false;
return new DisplayList();
}
}
// Try to use a display list compiled for this text.
displayList = displayLists.get(displayListKey);
if (displayList != null) {
if (displayList.invalid) {
displayList.invalid = false;
} else {
GL.glTranslatef(x, y, 0);
GL.glCallList(displayList.id);
GL.glTranslatef(-x, -y, 0);
return displayList;
}
} else if (displayList == null) {
// Compile a new display list.
displayList = new DisplayList();
int displayListCount = displayLists.size();
displayLists.put(displayListKey, displayList);
if (displayListCount < DISPLAY_LIST_CACHE_SIZE) {
displayList.id = baseDisplayListID + displayListCount;
} else {
displayList.id = eldestDisplayListID;
}
}
displayLists.put(displayListKey, displayList);
}
GL.glTranslatef(x, y, 0);
if (displayList != null) {
GL.glNewList(displayList.id, GL11.GL_COMPILE_AND_EXECUTE);
}
char[] chars = text.substring(0, endIndex).toCharArray();
GlyphVector vector = font.layoutGlyphVector(GlyphPage.RENDER_CONTEXT, chars, 0, chars.length, Font.LAYOUT_LEFT_TO_RIGHT);
int maxWidth = 0, maxLogicWidth = 0, totalHeight = 0, lines = 0;
int extraX = 0, extraY = ascent;
boolean startNewLine = false;
Texture lastBind = null;
for (int glyphIndex = 0, n = vector.getNumGlyphs(); glyphIndex < n; glyphIndex++) {
int charIndex = vector.getGlyphCharIndex(glyphIndex);
if (charIndex < startIndex) {
continue;
}
if (charIndex > endIndex) {
break;
}
int codePoint = text.codePointAt(charIndex);
Rectangle bounds = getGlyphBounds(vector, glyphIndex, codePoint);
Rectangle boundsLogic = vector.getLogicalBounds().getBounds();
Glyph glyph = getGlyph(vector.getGlyphCode(glyphIndex), codePoint, bounds, vector, glyphIndex);
if (startNewLine && codePoint != '\n') {
extraX = -bounds.x;
startNewLine = false;
}
Image image = glyph.getImage();
if (image == null && missingGlyph != null && glyph.isMissing()) {
image = missingGlyph.getImage();
}
if (image != null) {
// Draw glyph, only binding a new glyph page texture when necessary.
Texture texture = image.getTexture();
if (lastBind != null && lastBind != texture) {
GL.glEnd();
lastBind = null;
}
if (lastBind == null) {
texture.bind();
GL.glBegin(GL11.GL_QUADS);
lastBind = texture;
}
image.drawEmbedded(bounds.x + extraX, bounds.y + extraY, image.getWidth(), image.getHeight());
}
if (glyphIndex >= 0) {
extraX += paddingRight + paddingLeft + paddingAdvanceX;
}
maxWidth = Math.max(maxWidth, bounds.x + extraX + bounds.width);
maxLogicWidth = Math.max(maxLogicWidth, boundsLogic.x + extraX + boundsLogic.width);
totalHeight = Math.max(totalHeight, ascent + bounds.y + bounds.height);
if (codePoint == '\n') {
startNewLine = true; // Mac gives -1 for bounds.x of '\n', so use the bounds.x of the next glyph.
extraY += getLineHeight();
lines++;
totalHeight = 0;
}
}
if (lastBind != null) {
GL.glEnd();
}
if (displayList != null) {
GL.glEndList();
// Invalidate the display list if it had glyphs that need to be loaded.
if (!queuedGlyphs.isEmpty()) {
displayList.invalid = true;
}
}
GL.glTranslatef(-x, -y, 0);
if (displayList == null) {
displayList = new DisplayList();
}
displayList.logicalWidth = (short) maxLogicWidth;
displayList.width = (short) maxWidth;
displayList.height = (short) (lines * getLineHeight() + totalHeight);
return displayList;
}
@Override
public void drawString(float x, float y, String text, Color color, int startIndex, int endIndex) {
drawDisplayList(x, y, text, color, startIndex, endIndex);
}
@Override
public void drawString(float x, float y, String text) {
drawString(x, y, text, Color.white);
}
@Override
public void drawString(float x, float y, String text, Color col) {
drawString(x, y, text, col, 0, text.length());
}
/**
* Returns the glyph for the specified codePoint. If the glyph does not exist yet,
* it is created and queued to be loaded.
*
* @param glyphCode
* The code of the glyph to locate
* @param codePoint
* The code point associated with the glyph
* @param bounds
* The bounds of the glyph on the page
* @param vector
* The vector the glyph is part of
* @param index
* The index of the glyph within the vector
* @return The glyph requested
*/
private Glyph getGlyph(int glyphCode, int codePoint, Rectangle bounds, GlyphVector vector, int index) {
if (glyphCode < 0 || glyphCode >= MAX_GLYPH_CODE) {
// GlyphVector#getGlyphCode sometimes returns negative numbers on OS X.
return new Glyph(codePoint, bounds, vector, index, this) {
@Override
public boolean isMissing() {
return true;
}
};
}
int pageIndex = glyphCode / PAGE_SIZE;
int glyphIndex = glyphCode & PAGE_SIZE - 1;
Glyph glyph = null;
Glyph[] page = glyphs[pageIndex];
if (page != null) {
glyph = page[glyphIndex];
if (glyph != null) {
return glyph;
}
} else {
page = glyphs[pageIndex] = new Glyph[PAGE_SIZE];
}
// Add glyph so size information is available and queue it so its image can be loaded later.
glyph = page[glyphIndex] = new Glyph(codePoint, bounds, vector, index, this);
queuedGlyphs.add(glyph);
return glyph;
}
/**
* Returns the bounds of the specified glyph.\
*
* @param vector
* The vector the glyph is part of
* @param index
* The index of the glyph within the vector
* @param codePoint
* The code point associated with the glyph
*/
private Rectangle getGlyphBounds(GlyphVector vector, int index, int codePoint) {
Rectangle bounds = vector.getGlyphPixelBounds(index, GlyphPage.RENDER_CONTEXT, 0, 0);
if (codePoint == ' ') {
bounds.width = spaceWidth;
}
return bounds;
}
/**
* Returns the width of the space character.
*/
public int getSpaceWidth() {
return spaceWidth;
}
/**
* @see com.github.mathiewz.slick.Font#getWidth(java.lang.String)
*/
@Override
public int getWidth(String text) {
if (text == null) {
throw new IllegalArgumentException("text cannot be null.");
}
if (text.length() == 0) {
return 0;
}
if (displayListCaching) {
DisplayList displayList = displayLists.get(text);
if (displayList != null) {
return displayList.width;
}
}
int width = findWidth(text, false);
return width;
}
/**
* @param text
* the string to find the width of
* @param logical
* whether to add the space the letters should occupy on the end
* @return width of string.
*/
private int findWidth(String text, boolean logical) {
char[] chars = text.toCharArray();
GlyphVector vector = font.layoutGlyphVector(GlyphPage.RENDER_CONTEXT, chars, 0, chars.length, Font.LAYOUT_LEFT_TO_RIGHT);
int width = 0;
int extraX = 0;
boolean startNewLine = false;
for (int glyphIndex = 0, n = vector.getNumGlyphs(); glyphIndex < n; glyphIndex++) {
int charIndex = vector.getGlyphCharIndex(glyphIndex);
int codePoint = text.codePointAt(charIndex);
Rectangle bounds = logical ? vector.getLogicalBounds().getBounds() : getGlyphBounds(vector, glyphIndex, codePoint);
if (startNewLine && codePoint != '\n') {
extraX = -bounds.x;
}
if (glyphIndex > 0) {
extraX += paddingLeft + paddingRight + paddingAdvanceX;
}
width = Math.max(width, bounds.x + extraX + bounds.width);
if (codePoint == '\n') {
startNewLine = true;
}
}
return width;
}
/**
* @see com.github.mathiewz.slick.Font#getLogicalWidth(String)
*/
@Override
public int getLogicalWidth(String text) {
if (text == null) {
throw new IllegalArgumentException("text cannot be null.");
}
if (text.length() == 0) {
return 0;
}
if (displayListCaching) {
DisplayList displayList = displayLists.get(text);
if (displayList != null) {
return displayList.logicalWidth;
}
}
int width = findWidth(text, true);
return width;
}
/**
* @see com.github.mathiewz.slick.Font#getHeight(java.lang.String)
*/
@Override
public int getHeight(String text) {
if (text == null) {
throw new IllegalArgumentException("text cannot be null.");
}
if (text.length() == 0) {
return 0;
}
if (displayListCaching) {
DisplayList displayList = displayLists.get(text);
if (displayList != null) {
return displayList.height;
}
}
char[] chars = text.toCharArray();
GlyphVector vector = font.layoutGlyphVector(GlyphPage.RENDER_CONTEXT, chars, 0, chars.length, Font.LAYOUT_LEFT_TO_RIGHT);
int lines = 0, height = 0;
for (int i = 0, n = vector.getNumGlyphs(); i < n; i++) {
int charIndex = vector.getGlyphCharIndex(i);
int codePoint = text.codePointAt(charIndex);
if (codePoint == ' ') {
continue;
}
Rectangle bounds = getGlyphBounds(vector, i, codePoint);
height = Math.max(height, ascent + bounds.y + bounds.height);
if (codePoint == '\n') {
lines++;
height = 0;
}
}
return lines * getLineHeight() + height;
}
/**
* Returns the distance from the y drawing location to the top most pixel of the
* specified text.
*
* @param text
* The text to analyse
* @return The distance fro the y drawing location ot the top most pixel of the specified text
*/
public int getYOffset(String text) {
if (text == null) {
throw new IllegalArgumentException("text cannot be null.");
}
DisplayList displayList = null;
if (displayListCaching) {
displayList = displayLists.get(text);
if (displayList != null && displayList.yOffset != null) {
return displayList.yOffset.intValue();
}
}
int index = text.indexOf('\n');
if (index != -1) {
text = text.substring(0, index);
}
char[] chars = text.toCharArray();
GlyphVector vector = font.layoutGlyphVector(GlyphPage.RENDER_CONTEXT, chars, 0, chars.length, Font.LAYOUT_LEFT_TO_RIGHT);
int yOffset = ascent + vector.getPixelBounds(null, 0, 0).y;
if (displayList != null) {
displayList.yOffset = new Short((short) yOffset);
}
return yOffset;
}
/**
* Returns the TrueTypeFont for this UnicodeFont.
*
* @return The AWT Font being rendered
*/
public Font getFont() {
return font;
}
/**
* Returns the padding above a glyph on the GlyphPage to allow for effects to be drawn.
*
* @return The padding at the top of the glyphs when drawn
*/
public int getPaddingTop() {
return paddingTop;
}
/**
* Sets the padding above a glyph on the GlyphPage to allow for effects to be drawn.
*
* @param paddingTop
* The padding at the top of the glyphs when drawn
*/
public void setPaddingTop(int paddingTop) {
this.paddingTop = paddingTop;
}
/**
* Returns the padding to the left of a glyph on the GlyphPage to allow for effects to be drawn.
*
* @return The padding at the left of the glyphs when drawn
*/
public int getPaddingLeft() {
return paddingLeft;
}
/**
* Sets the padding to the left of a glyph on the GlyphPage to allow for effects to be drawn.
*
* @param paddingLeft
* The padding at the left of the glyphs when drawn
*/
public void setPaddingLeft(int paddingLeft) {
this.paddingLeft = paddingLeft;
}
/**
* Returns the padding below a glyph on the GlyphPage to allow for effects to be drawn.
*
* @return The padding at the bottom of the glyphs when drawn
*/
public int getPaddingBottom() {
return paddingBottom;
}
/**
* Sets the padding below a glyph on the GlyphPage to allow for effects to be drawn.
*
* @param paddingBottom
* The padding at the bottom of the glyphs when drawn
*/
public void setPaddingBottom(int paddingBottom) {
this.paddingBottom = paddingBottom;
}
/**
* Returns the padding to the right of a glyph on the GlyphPage to allow for effects to be drawn.
*
* @return The padding at the right of the glyphs when drawn
*/
public int getPaddingRight() {
return paddingRight;
}
/**
* Sets the padding to the right of a glyph on the GlyphPage to allow for effects to be drawn.
*
* @param paddingRight
* The padding at the right of the glyphs when drawn
*/
public void setPaddingRight(int paddingRight) {
this.paddingRight = paddingRight;
}
/**
* Gets the additional amount to offset glyphs on the x axis.
*
* @return The padding applied for each horizontal advance (i.e. when a glyph is rendered)
*/
public int getPaddingAdvanceX() {
return paddingAdvanceX;
}
/**
* Sets the additional amount to offset glyphs on the x axis. This is typically set to a negative number when left or right
* padding is used so that glyphs are not spaced too far apart.
*
* @param paddingAdvanceX
* The padding applied for each horizontal advance (i.e. when a glyph is rendered)
*/
public void setPaddingAdvanceX(int paddingAdvanceX) {
this.paddingAdvanceX = paddingAdvanceX;
}
/**
* Gets the additional amount to offset a line of text on the y axis.
*
* @return The padding applied for each vertical advance (i.e. when a glyph is rendered)
*/
public int getPaddingAdvanceY() {
return paddingAdvanceY;
}
/**
* Sets the additional amount to offset a line of text on the y axis. This is typically set to a negative number when top or
* bottom padding is used so that lines of text are not spaced too far apart.
*
* @param paddingAdvanceY
* The padding applied for each vertical advance (i.e. when a glyph is rendered)
*/
public void setPaddingAdvanceY(int paddingAdvanceY) {
this.paddingAdvanceY = paddingAdvanceY;
}
/**
* Returns the distance from one line of text to the next. This is the sum of the descent, ascent, leading, padding top,
* padding bottom, and padding advance y. To change the line height, use {@link #setPaddingAdvanceY(int)}.
*/
@Override
public int getLineHeight() {
return descent + ascent + leading + paddingTop + paddingBottom + paddingAdvanceY;
}
/**
* Gets the distance from the baseline to the y drawing location.
*
* @return The ascent of this font
*/
public int getAscent() {
return ascent;
}
/**
* Gets the distance from the baseline to the bottom of most alphanumeric characters
* with descenders.
*
* @return The distance from the baseline to the bottom of the font
*/
public int getDescent() {
return descent;
}
/**
* Gets the extra distance between the descent of one line of text to the ascent of the next.
*
* @return The leading edge of the font
*/
public int getLeading() {
return leading;
}
/**
* Returns the width of the backing textures.
*
* @return The width of the glyph pages in this font
*/
public int getGlyphPageWidth() {
return glyphPageWidth;
}
/**
* Sets the width of the backing textures. Default is 512.
*
* @param glyphPageWidth
* The width of the glyph pages in this font
*/
public void setGlyphPageWidth(int glyphPageWidth) {
this.glyphPageWidth = glyphPageWidth;
}
/**
* Returns the height of the backing textures.
*
* @return The height of the glyph pages in this font
*/
public int getGlyphPageHeight() {
return glyphPageHeight;
}
/**
* Sets the height of the backing textures. Default is 512.
*
* @param glyphPageHeight
* The width of the glyph pages in this font
*/
public void setGlyphPageHeight(int glyphPageHeight) {
this.glyphPageHeight = glyphPageHeight;
}
/**
* Returns the GlyphPages for this UnicodeFont.
*
* @return The glyph pages that have been loaded into this font
*/
public List getGlyphPages() {
return glyphPages;
}
/**
* Returns a list of {@link com.github.mathiewz.slick.font.effects.Effect}s that will be applied
* to the glyphs.
*
* @return The list of effects to be applied to the font
*/
public List getEffects() {
return effects;
}
/**
* Returns true if this UnicodeFont caches the glyph drawing instructions to
* improve performance.
*
* @return True if caching is turned on
*/
public boolean isCaching() {
return displayListCaching;
}
/**
* Sets if this UnicodeFont caches the glyph drawing instructions to improve performance.
* Default is true. Text rendering is very slow without display list caching.
*
* @param displayListCaching
* True if caching should be turned on
*/
public void setDisplayListCaching(boolean displayListCaching) {
this.displayListCaching = displayListCaching;
}
/**
* Returns the path to the TTF file for this UnicodeFont, or null. If this UnicodeFont was created without specifying the TTF
* file, it will try to determine the path using Sun classes. If this fails, null is returned.
*
* @return The reference to the font file that the kerning was loaded from
*/
public String getFontFile() {
if (ttfFileRef == null) {
// Worst case if this UnicodeFont was loaded without a ttfFileRef, try to get the font file from Sun's classes.
try {
Object font2D = Class.forName("sun.font.FontManager").getDeclaredMethod("getFont2D", new Class[] { Font.class }).invoke(null, new Object[] { font });
Field platNameField = Class.forName("sun.font.PhysicalFont").getDeclaredField("platName");
platNameField.setAccessible(true);
ttfFileRef = (String) platNameField.get(font2D);
} catch (Throwable ignored) {
}
if (ttfFileRef == null) {
ttfFileRef = "";
}
}
if (ttfFileRef.length() == 0) {
return null;
}
return ttfFileRef;
}
/**
* A simple descriptor for display lists cached within this font
*/
public static class DisplayList {
/** True if this display list has been invalidated */
boolean invalid;
/** The ID of the display list this descriptor represents */
int id;
/** The vertical offset to the top of this display list */
Short yOffset;
/** The width of rendered text in the list */
public short width;
/** The logical width of the text in the list */
public short logicalWidth;
/** The height of the rendered text in the list */
public short height;
/** Application data stored in the list */
public Object userData;
DisplayList() {
}
}
}
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