Java tutorial
/* [LGPL] Copyright 2010, 2011 Irah This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ package fi.conf.ae.gl.text; import java.awt.Color; import java.awt.Font; import java.awt.FontMetrics; import java.awt.Graphics; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import java.nio.file.Path; import javax.imageio.ImageIO; import org.lwjgl.opengl.GL11; import fi.conf.ae.gl.texture.GLTextureManager; import fi.conf.ae.routines.S; public class GLBitmapFontBlitter { private Integer textureID; private BufferedImage fontBitmap; public GLBitmapFontBlitter(int textureID) { this.textureID = textureID; } public GLBitmapFontBlitter(File fontFile) { textureID = GLTextureManager.getInstance().blockingLoad(fontFile.toPath(), "fontTexture"); } public GLBitmapFontBlitter(Font font) { this(font, Color.BLACK, 0, Color.BLACK); } public GLBitmapFontBlitter(Font font, Color fontColor) { this(font, fontColor, 0, Color.BLACK); } public GLBitmapFontBlitter(Font font, Color fontColor, int outlineWidth, Color outlineColor) { String fontKey = font.getName(); if (font.isBold()) { fontKey += "b"; } if (font.isItalic()) { fontKey += "i"; } fontKey += fontColor.toString() + outlineWidth + outlineColor.toString(); textureID = GLTextureManager.getInstance().getTextureID(fontKey); if (textureID == null) { GLTextureManager.getInstance() .blockingLoad(createFontBitmap(font, fontColor, outlineWidth, outlineColor), fontKey); } textureID = GLTextureManager.getInstance().getTextureID(fontKey); } public BufferedImage createFontBitmap(Font font, Color fontColor, int outlineWidth, Color outlineColor) { //Find a better way to do this! ;-; fontBitmap = new BufferedImage(1, 1, BufferedImage.TYPE_4BYTE_ABGR); Graphics g = fontBitmap.getGraphics(); g.setFont(font); FontMetrics fm = g.getFontMetrics(); int xSpacing = (fm.getAscent() + fm.getDescent() + fm.getLeading()) / 4; int ySpacing = -fm.getHeight() / 4; int fontSpaceWidth = fm.getAscent() + fm.getDescent() + 2 * outlineWidth; int fontSpaceHeight = fm.getHeight() + 2 * outlineWidth; fontBitmap = new BufferedImage(16 * fontSpaceWidth, 16 * fontSpaceHeight, BufferedImage.TYPE_INT_ARGB); g = fontBitmap.getGraphics(); g.setColor(fontColor); //g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 1)); g.setFont(font); g.setColor(fontColor); for (char c = 0; c < 256; c++) { int cx = (int) (c % 16) * fontSpaceWidth + xSpacing; int cy = (int) (c / 16) * fontSpaceHeight + fontSpaceHeight + ySpacing; g.drawString("" + (char) (c), cx, cy); } //Make the outline if (outlineWidth > 0) { for (int x = outlineWidth; x < fontBitmap.getWidth() - outlineWidth; x++) { for (int y = outlineWidth; y < fontBitmap.getHeight() - outlineWidth; y++) { if (fontBitmap.getRGB(x, y) != fontColor.getRGB()) { for (int w = 1; w <= outlineWidth; w++) { if (fontBitmap.getRGB(x - w, y) == fontColor.getRGB()) { fontBitmap.setRGB(x, y, outlineColor.getRGB()); } if (fontBitmap.getRGB(x + w, y) == fontColor.getRGB()) { fontBitmap.setRGB(x, y, outlineColor.getRGB()); } if (fontBitmap.getRGB(x, y - w) == fontColor.getRGB()) { fontBitmap.setRGB(x, y, outlineColor.getRGB()); } if (fontBitmap.getRGB(x, y + w) == fontColor.getRGB()) { fontBitmap.setRGB(x, y, outlineColor.getRGB()); } if (fontBitmap.getRGB(x - w, y - w) == fontColor.getRGB()) { fontBitmap.setRGB(x, y, outlineColor.getRGB()); } if (fontBitmap.getRGB(x + w, y - w) == fontColor.getRGB()) { fontBitmap.setRGB(x, y, outlineColor.getRGB()); } if (fontBitmap.getRGB(x - w, y + w) == fontColor.getRGB()) { fontBitmap.setRGB(x, y, outlineColor.getRGB()); } if (fontBitmap.getRGB(x + w, y + w) == fontColor.getRGB()) { fontBitmap.setRGB(x, y, outlineColor.getRGB()); } } } } } } S.debug("Font sizes: " + fm.getHeight() + " " + fm.getAscent() + " " + fm.getDescent() + " " + fm.getLeading()); //Font font = new Font("Monospaced", Font.BOLD ,38); return fontBitmap; } public void saveFont(Path file) { try { ImageIO.write(fontBitmap, "png", file.toFile()); } catch (IOException e) { e.printStackTrace(); } } public static void drawString(String string, String textureIdentifier, float charWidth, float charHeight, Alignment align) { float hOverlap = 0.01f; float vOverlap = 0.0f; float xfix = 0; if (align.equals(Alignment.CENTERED)) { xfix = string.length() * charWidth * 0.5f; } else if (align.equals(Alignment.RIGHT)) { xfix = string.length() * charWidth - hOverlap; } GL11.glPushMatrix(); GL11.glTranslatef(0, -0.5f * charHeight, 0); GLTextureManager.getInstance().bindTexture(textureIdentifier); GL11.glBegin(GL11.GL_QUADS); for (int i = 0; i < string.length(); i++) { char c = string.charAt(i); float x1 = (c % 16f) / 16f; float x2 = x1 + 1f / 16f; float y1 = (c / 16) / 16f; float y2 = y1 + 1f / 16f; GL11.glTexCoord2d(x1 + hOverlap, y1 + vOverlap); GL11.glVertex3d(i * charWidth - xfix, 0, 0); GL11.glTexCoord2d(x1 + hOverlap, y2 - vOverlap); GL11.glVertex3d(i * charWidth - xfix, charHeight, 0); GL11.glTexCoord2d(x2 - hOverlap, y2 - vOverlap); GL11.glVertex3d(i * charWidth + charWidth - xfix, charHeight, 0); GL11.glTexCoord2d(x2 - hOverlap, y1 + vOverlap); GL11.glVertex3d(i * charWidth + charWidth - xfix, 0, 0); } GL11.glEnd(); GL11.glPopMatrix(); } public static void drawScrollerString(String string, float charWidth, float charHeight, float freq, float amplitude, float phase, String font) { float overlap = 0.2f; float fix = 0; GL11.glPushMatrix(); GLTextureManager.getInstance().bindTexture(font); //GL11.glBindTexture(GL11.GL_TEXTURE_2D, fontTextureID); GL11.glEnable(GL11.GL_DEPTH_TEST); //GLRoutines.drawSprite(0f, 0f, 2f, 2f, 1f); GL11.glBegin(GL11.GL_QUADS); for (int i = 0; i < string.length(); i++) { char c = string.charAt(i); float s = (float) Math.sin(phase + freq * 2 * Math.PI * i / string.length()) * amplitude; float x1 = (c % 16f) / 16f; float x2 = (c % 16f) / 16f + 1f / 16f; float y1 = (c / 16) / 16f; float y2 = (c / 16) / 16f + 1f / 16f; //drawSprite(x1, y1, x2, y2, 0); //GL11.glColor3f((float)Math.random()*1.3f, (float)Math.random()*1.3f, (float)Math.random()*1.3f); GL11.glTexCoord2d(x1, y1); GL11.glVertex3d(i * charWidth - fix - overlap, s, 0); GL11.glTexCoord2d(x1, y2); GL11.glVertex3d(i * charWidth - fix - overlap, charHeight + s, 0); GL11.glTexCoord2d(x2, y2); GL11.glVertex3d(i * charWidth + charWidth - fix, charHeight + s, 0); GL11.glTexCoord2d(x2, y1); GL11.glVertex3d(i * charWidth + charWidth - fix, s, 0); } GL11.glEnd(); GL11.glPopMatrix(); } public static void drawCircleString(String string, float charHeight, float freq, float radius, float phase, String font) { GL11.glPushMatrix(); GLTextureManager.getInstance().bindTexture(font); //GL11.glBindTexture(GL11.GL_TEXTURE_2D, fontTextureID); GL11.glEnable(GL11.GL_DEPTH_TEST); //GLRoutines.drawSprite(0f, 0f, 2f, 2f, 1f); //GL11.glTranslatef(charWidth/2, -charHeight/2, 0); for (int i = 0; i < string.length(); i++) { char c = string.charAt(string.length() - 1 - i); float vx1 = (float) Math.sin(phase + freq * 2 * Math.PI * i / string.length()) * radius; float vy1 = (float) Math.cos(phase + freq * 2 * Math.PI * i / string.length()) * radius; float vx2 = (float) Math.sin(phase + freq * 2 * Math.PI * i / string.length()) * radius * charHeight; float vy2 = (float) Math.cos(phase + freq * 2 * Math.PI * i / string.length()) * radius * charHeight; float vx3 = (float) Math.sin(phase + freq * 2 * Math.PI * (i + 1) / string.length()) * radius; float vy3 = (float) Math.cos(phase + freq * 2 * Math.PI * (i + 1) / string.length()) * radius; float vx4 = (float) Math.sin(phase + freq * 2 * Math.PI * (i + 1) / string.length()) * radius * charHeight; float vy4 = (float) Math.cos(phase + freq * 2 * Math.PI * (i + 1) / string.length()) * radius * charHeight; float x1 = (c % 16f) / 16f; float x2 = (c % 16f) / 16f + 1f / 16f; float y1 = (c / 16) / 16f; float y2 = (c / 16) / 16f + 1f / 16f; //GL11.glColor3f((float)Math.random()*1.3f, (float)Math.random()*1.3f, (float)Math.random()*1.3f); //GL11.glBindTexture(GL11.GL_TEXTURE_2D, -1); GL11.glBegin(GL11.GL_QUADS); GL11.glTexCoord2d(x1, y1); GL11.glVertex3d(vy4, vx4, 0); GL11.glTexCoord2d(x1, y2); GL11.glVertex3d(vy3, vx3, 0); GL11.glTexCoord2d(x2, y2); GL11.glVertex3d(vy1, vx1, 0); GL11.glTexCoord2d(x2, y1); GL11.glVertex3d(vy2, vx2, 0); GL11.glEnd(); } GL11.glPopMatrix(); } public static enum Alignment { LEFT, CENTERED, RIGHT } }