/*******************************************************************************
* Copyright 2011 See AUTHORS file.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
package com.badlogic.gdx.tools.hiero;
import java.awt.Font;
import java.awt.font.GlyphMetrics;
import java.awt.font.GlyphVector;
import java.awt.image.BufferedImage;
import java.awt.image.WritableRaster;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.nio.IntBuffer;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import javax.imageio.ImageIO;
import org.lwjgl.BufferUtils;
import org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.GL12;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.tools.hiero.unicodefont.Glyph;
import com.badlogic.gdx.tools.hiero.unicodefont.GlyphPage;
import com.badlogic.gdx.tools.hiero.unicodefont.UnicodeFont;
/** @author Nathan Sweet */
public class BMFontUtil {
private final UnicodeFont unicodeFont;
public BMFontUtil (UnicodeFont unicodeFont) {
this.unicodeFont = unicodeFont;
}
public void save (File outputBMFontFile) throws IOException {
File outputDir = outputBMFontFile.getParentFile();
String outputName = outputBMFontFile.getName();
if (outputName.endsWith(".fnt")) outputName = outputName.substring(0, outputName.length() - 4);
unicodeFont.loadGlyphs();
PrintStream out = new PrintStream(new FileOutputStream(new File(outputDir, outputName + ".fnt")));
Font font = unicodeFont.getFont();
int pageWidth = unicodeFont.getGlyphPageWidth();
int pageHeight = unicodeFont.getGlyphPageHeight();
out.println("info face=\"" + font.getFontName() + "\" size=" + font.getSize() + " bold=" + (font.isBold() ? 1 : 0)
+ " italic=" + (font.isItalic() ? 1 : 0) + " charset=\"\" unicode=0 stretchH=100 smooth=1 aa=1 padding="
+ unicodeFont.getPaddingTop() + "," + unicodeFont.getPaddingLeft() + "," + unicodeFont.getPaddingBottom() + ","
+ unicodeFont.getPaddingRight() + " spacing=" + unicodeFont.getPaddingAdvanceX() + ","
+ unicodeFont.getPaddingAdvanceY());
out.println("common lineHeight=" + unicodeFont.getLineHeight() + " base=" + unicodeFont.getAscent() + " scaleW="
+ pageWidth + " scaleH=" + pageHeight + " pages=" + unicodeFont.getGlyphPages().size() + " packed=0");
int pageIndex = 0, glyphCount = 0;
for (Iterator pageIter = unicodeFont.getGlyphPages().iterator(); pageIter.hasNext();) {
GlyphPage page = (GlyphPage)pageIter.next();
String fileName;
if (pageIndex == 0 && !pageIter.hasNext())
fileName = outputName + ".png";
else
fileName = outputName + (pageIndex + 1) + ".png";
out.println("page id=" + pageIndex + " file=\"" + fileName + "\"");
glyphCount += page.getGlyphs().size();
pageIndex++;
}
out.println("chars count=" + glyphCount);
// Always output space entry (codepoint 32).
int[] glyphMetrics = getGlyphMetrics(font, 32);
int xAdvance = glyphMetrics[1];
out.println("char id=32 x=0 y=0 width=0 height=0 xoffset=0 yoffset=" + unicodeFont.getAscent()
+ " xadvance=" + xAdvance + " page=0 chnl=0 ");
pageIndex = 0;
List allGlyphs = new ArrayList(512);
for (Iterator pageIter = unicodeFont.getGlyphPages().iterator(); pageIter.hasNext();) {
GlyphPage page = (GlyphPage)pageIter.next();
for (Iterator glyphIter = page.getGlyphs().iterator(); glyphIter.hasNext();) {
Glyph glyph = (Glyph)glyphIter.next();
glyphMetrics = getGlyphMetrics(font, glyph.getCodePoint());
int xOffset = glyphMetrics[0];
xAdvance = glyphMetrics[1];
out.println("char id=" + glyph.getCodePoint() + " " + "x=" + (int)(glyph.getU() * pageWidth) + " y="
+ (int)(glyph.getV() * pageHeight) + " width=" + glyph.getWidth() + " height=" + glyph.getHeight()
+ " xoffset=" + xOffset + " yoffset=" + glyph.getYOffset() + " xadvance=" + xAdvance + " page="
+ pageIndex + " chnl=0 ");
}
allGlyphs.addAll(page.getGlyphs());
pageIndex++;
}
String ttfFileRef = unicodeFont.getFontFile();
if (ttfFileRef == null)
System.out.println("Kerning information could not be output because a TTF font file was not specified.");
else {
Kerning kerning = new Kerning();
try {
kerning.load(Gdx.files.internal(ttfFileRef).read(), font.getSize());
} catch (IOException ex) {
System.out.println("Unable to read kerning information from font: " + ttfFileRef);
}
Map glyphCodeToCodePoint = new HashMap();
for (Iterator iter = allGlyphs.iterator(); iter.hasNext();) {
Glyph glyph = (Glyph)iter.next();
glyphCodeToCodePoint.put(new Integer(getGlyphCode(font, glyph.getCodePoint())), new Integer(glyph.getCodePoint()));
}
List kernings = new ArrayList(256);
class KerningPair {
public int firstCodePoint, secondCodePoint, offset;
}
for (Iterator iter1 = allGlyphs.iterator(); iter1.hasNext();) {
Glyph firstGlyph = (Glyph)iter1.next();
int firstGlyphCode = getGlyphCode(font, firstGlyph.getCodePoint());
int[] values = kerning.getValues(firstGlyphCode);
if (values == null) continue;
for (int i = 0; i < values.length; i++) {
Integer secondCodePoint = (Integer)glyphCodeToCodePoint.get(new Integer(values[i] & 0xffff));
if (secondCodePoint == null) continue; // We may not be outputting the second character.
int offset = values[i] >> 16;
KerningPair pair = new KerningPair();
pair.firstCodePoint = firstGlyph.getCodePoint();
pair.secondCodePoint = secondCodePoint.intValue();
pair.offset = offset;
kernings.add(pair);
}
}
out.println("kernings count=" + kerning.getCount());
for (Iterator iter = kernings.iterator(); iter.hasNext();) {
KerningPair pair = (KerningPair)iter.next();
out.println("kerning first=" + pair.firstCodePoint + " second=" + pair.secondCodePoint + " amount=" + pair.offset);
}
}
out.close();
int width = unicodeFont.getGlyphPageWidth();
int height = unicodeFont.getGlyphPageHeight();
IntBuffer buffer = BufferUtils.createIntBuffer(width * height);
BufferedImage pageImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
int[] row = new int[width];
pageIndex = 0;
for (Iterator pageIter = unicodeFont.getGlyphPages().iterator(); pageIter.hasNext();) {
GlyphPage page = (GlyphPage)pageIter.next();
String fileName;
if (pageIndex == 0 && !pageIter.hasNext())
fileName = outputName + ".png";
else
fileName = outputName + (pageIndex + 1) + ".png";
page.getTexture().bind();
buffer.clear();
GL11.glGetTexImage(GL11.GL_TEXTURE_2D, 0, GL12.GL_BGRA, GL11.GL_UNSIGNED_BYTE, buffer);
WritableRaster raster = pageImage.getRaster();
for (int y = 0; y < height; y++) {
buffer.get(row);
raster.setDataElements(0, y, width, 1, row);
}
File imageOutputFile = new File(outputDir, fileName);
ImageIO.write(pageImage, "png", imageOutputFile);
pageIndex++;
}
}
private int getGlyphCode (Font font, int codePoint) {
char[] chars = Character.toChars(codePoint);
GlyphVector vector = font.layoutGlyphVector(GlyphPage.renderContext, chars, 0, chars.length, Font.LAYOUT_LEFT_TO_RIGHT);
return vector.getGlyphCode(0);
}
private int[] getGlyphMetrics (Font font, int codePoint) {
// 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};
}
}