[LIBGDX学习]LibGDX代码详解（一）bitmap font

package com.mygdx.game; import com.badlogic.gdx.Gdx; import com.badlogic.gdx.graphics.Color; import com.badlogic.gdx.graphics.Colors; import com.badlogic.gdx.graphics.GL20; import com.badlogic.gdx.graphics.Texture.TextureFilter; import com.badlogic.gdx.graphics.g2d.BitmapFont; import com.badlogic.gdx.graphics.g2d.BitmapFontCache; import com.badlogic.gdx.graphics.g2d.GlyphLayout; import com.badlogic.gdx.graphics.g2d.GlyphLayout.GlyphRun; import com.badlogic.gdx.graphics.g2d.SpriteBatch; import com.badlogic.gdx.graphics.glutils.ShapeRenderer; import com.badlogic.gdx.graphics.glutils.ShapeRenderer.ShapeType; import com.badlogic.gdx.scenes.scene2d.Stage; import com.badlogic.gdx.scenes.scene2d.ui.Label; import com.badlogic.gdx.scenes.scene2d.ui.Skin; import com.badlogic.gdx.scenes.scene2d.ui.Window; import com.badlogic.gdx.utils.Align; import com.badlogic.gdx.utils.viewport.ScreenViewport; import com.mygdx.game.utils.GdxTest; public class BitmapFontTest extends GdxTest { private Stage stage; private SpriteBatch spriteBatch; private BitmapFont font; private ShapeRenderer renderer; private BitmapFont multiPageFont; private GlyphLayout layout; private Label label; @Override public void create () { spriteBatch = new SpriteBatch(); font = new BitmapFont(Gdx.files.internal("data/verdana39.fnt"), false); // font = new BitmapFont(Gdx.files.internal("data/arial-32-pad.fnt"), false); // font = new FreeTypeFontGenerator(Gdx.files.internal("data/arial.ttf")).generateFont(new FreeTypeFontParameter()); font.getData().markupEnabled = true; font.getData().breakChars = new char[] {'-'}; multiPageFont = new BitmapFont(Gdx.files.internal("data/multipagefont.fnt")); // Add user defined color Colors.put("PERU", Color.valueOf("CD853F")); Colors.put("USER1", Color.valueOf("F5E40A")); Colors.put("USER2", Color.valueOf("DC6839")); Colors.put("USER3", Color.valueOf("92B467")); Colors.put("USER4", Color.valueOf("51B181")); Colors.put("USER5", Color.valueOf("DCDCDC")); renderer = new ShapeRenderer(); renderer.setProjectionMatrix(spriteBatch.getProjectionMatrix()); stage = new Stage(new ScreenViewport()); Skin skin = new Skin(Gdx.files.internal("data/uiskin.json")); BitmapFont labelFont = skin.get("default-font", BitmapFont.class); labelFont.getData().markupEnabled = true;// 这句没有，灰黑框里的就变成白色的，下面的彩色字也变成白色而且显示前面的[BLUE]这些标签 // Notice that the last [] has been deliberately added to test the effect of excessive pop operations. // They are silently ignored, as expected. //label = new Label("<<[BLUE]M[RED]u[YELLOW]l[GREEN]t[OLIVE]ic[]o[]l[]o[]r[]*[MAROON]Label[][] [Unknown Color]>>", skin); label = new Label("<<[USER1]M[USER2]u[USER3]l[USER4]t[USER5]ic[PERU]o[]l[]o[]r[]*[MAROON]Label[][] [Unknown Color]>>", skin); label.setScale(8f); label.setPosition(100, 200); stage.addActor(label); Window window = new Window("[RED]Multicolor[GREEN] Title", skin); window.setPosition(400, 300); window.setSize(200,150); //window.pack();// 这句让窗体变得刚好和标题一样宽，没有长度 stage.addActor(window); layout = new GlyphLayout(); } @Override public void render () { // red.a = (red.a + Gdx.graphics.getDeltaTime() * 0.1f) % 1; int viewHeight = Gdx.graphics.getHeight(); Gdx.gl.glClearColor(0, 0, 0, 1); Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT); // Test wrapping or truncation with the font directly. if (!true) {// 直接true就执行!true就不执行 // BitmapFont font = label.getStyle().font; BitmapFont font = this.font; font.getRegion().getTexture().setFilter(TextureFilter.Nearest, TextureFilter.Nearest); font.getData().setScale(2f); renderer.begin(ShapeRenderer.ShapeType.Line); renderer.setColor(0, 1, 0, 1); float w = Gdx.input.getX(); // w = 855; renderer.rect(10, 10, w, 500); renderer.end(); spriteBatch.begin(); String text = "your new"; text = "How quickly [RED]daft jumping zebras vex."; // text = "Another font wrap is-sue, this time with multiple whitespace characters."; text = "test with AGWlWi AGWlWi issue"; if (true) { // Test wrap. layout.setText(font, text, 0, text.length(), font.getColor(), w, Align.center, true, null); } else { // Test truncation. layout.setText(font, text, 0, text.length(), font.getColor(), w, Align.center, false, "..."); } float meowy = (500 / 2 + layout.height / 2 + 5);// layout.height 应该就是一行字高度的一半 //float meowy = (500 / 2 + 5); //Gdx.app.log("Jacob",""+layout.height); font.draw(spriteBatch, layout, 10, 10 + meowy); spriteBatch.end(); renderer.begin(ShapeRenderer.ShapeType.Line); renderer.setColor(0, 1, 0, 1); for (int i = 0, n = layout.runs.size; i < n; i++) {// runs 就是折行数？ GlyphRun r = layout.runs.get(i); //Gdx.app.log("Jacobsize",""+layout.runs.size); renderer.rect(10 + r.x, 10 + meowy + r.y, r.width, -font.getLineHeight()); } renderer.end(); font.getData().setScale(1f); return; } // Test wrapping with label. if (!true) { //label.debug();// 显示绿框 label.getStyle().font = font;// 把label的font字体设定设置成这里的font的字体设定 label.setStyle(label.getStyle()); label.setText("How quickly [RED]daft[] jumping zebras vex."); label.setWrap(true); //label.setWrap(false); //label.setEllipsis(true); label.setAlignment(Align.center, Align.right); label.setWidth(Gdx.input.getX() - label.getX()); label.setHeight(label.getPrefHeight()); } else { // Test various font features. spriteBatch.begin(); String text = "Sphinx of black quartz, judge my vow."; font.setColor(Color.YELLOW); float x = 100, y = 20; float alignmentWidth; if (!true) { alignmentWidth = 0; font.draw(spriteBatch, text, x, viewHeight - y, alignmentWidth, Align.right, false);// 对其宽度是零，字符串直接被挤到屏幕外 } if (true) { //alignmentWidth = 280; alignmentWidth = 140; font.draw(spriteBatch, text, x, viewHeight - y, alignmentWidth, Align.right, true); } font.draw(spriteBatch, "[", 50, 60, 100, Align.left, true); font.getData().markupEnabled = true; font.draw(spriteBatch, "[", 100, 60, 100, Align.left, true); font.getData().markupEnabled = false; // 'R' and 'p' are in different pages String txt2 = "this font uses " + multiPageFont.getRegions().size + " texture pages: RpRpRpRpRpNM"; //Gdx.app.log("Jacob","render call before: "+spriteBatch.renderCalls); spriteBatch.renderCalls = 0;// 有没有这句都是零这句有啥用？ //Gdx.app.log("Jacob","render call after: "+spriteBatch.renderCalls); // regular draw function multiPageFont.setColor(Color.BLUE); multiPageFont.draw(spriteBatch, txt2, 10, 100); // expert usage.. drawing with bitmap font cache // 下面这段为何没显示任何东西？ BitmapFontCache cache = multiPageFont.getCache(); cache.clear(); cache.setColor(Color.BLACK); cache.setText(txt2, 10, 50); //cache.setText(txt2, 0, 0); cache.setColors(Color.PINK, 3, 6); cache.setColors(Color.ORANGE, 9, 12); cache.setColors(Color.GREEN, 16, txt2.length()); cache.draw(spriteBatch, 5, txt2.length() - 5);//为何无用？？？？？ //cache.draw(spriteBatch, 100, txt2.length()); //cache.draw(spriteBatch, 200, txt2.length()); cache.clear(); cache.setColor(Color.BLACK); float textX = 10; textX += cache.setText("[black] ", textX, 150).width; multiPageFont.getData().markupEnabled = true; textX += cache.addText("[[[PINK]pink[]] ", textX, 150).width; textX += cache.addText("[PERU][[peru] ", textX, 150).width; cache.setColor(Color.GREEN); textX += cache.addText("green ", textX, 150).width; textX += cache.addText("[#A52A2A]br[#A52A2ADF]ow[#A52A2ABF]n f[#A52A2A9F]ad[#A52A2A7F]in[#A52A2A5F]g o[#A52A2A3F]ut ",// 透明度一直更改 textX, 150).width; multiPageFont.getData().markupEnabled = false; cache.draw(spriteBatch); // tinting cache.tint(new Color(1f, 1f, 1f, 0.3f)); cache.translate(0f, 40f); cache.draw(spriteBatch); spriteBatch.end(); // System.out.println(spriteBatch.renderCalls); renderer.begin(ShapeType.Line); //renderer.setColor(Color.BLACK); renderer.setColor(Color.WHITE); renderer.rect(x, viewHeight - y - 200, alignmentWidth, 200); renderer.end(); } stage.act(Gdx.graphics.getDeltaTime()); stage.draw(); } public void resize (int width, int height) { spriteBatch.getProjectionMatrix().setToOrtho2D(0, 0, width, height); renderer.setProjectionMatrix(spriteBatch.getProjectionMatrix()); stage.getViewport().update(width, height, true); } @Override public void dispose () { spriteBatch.dispose(); renderer.dispose(); font.dispose(); // Restore predefined colors Colors.reset(); } } package com.mygdx.game; import com.badlogic.gdx