323 lines
11 KiB
HTML
323 lines
11 KiB
HTML
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<title>src/pixi/text/BitmapText.js - Pixi.JS</title>
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<h1 class="file-heading">File: src/pixi/text/BitmapText.js</h1>
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<div class="file">
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<pre class="code prettyprint linenums">
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/**
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* @author Mat Groves http://matgroves.com/ @Doormat23
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*/
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/**
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* A Text Object will create a line(s) of text using bitmap font. To split a line you can use "\n", "\r" or "\r\n"
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* You can generate the fnt files using
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* http://www.angelcode.com/products/bmfont/ for windows or
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* http://www.bmglyph.com/ for mac.
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* @class BitmapText
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* @extends DisplayObjectContainer
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* @constructor
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* @param {String} text The copy that you would like the text to display
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* @param {Object} style The style parameters
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* @param {String} style.font The size (optional) and bitmap font id (required) eq "Arial" or "20px Arial" (must have loaded previously)
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* @param {String} [style.align="left"] An alignment of the multiline text ("left", "center" or "right")
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*/
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PIXI.BitmapText = function(text, style)
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{
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PIXI.DisplayObjectContainer.call(this);
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this.setText(text);
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this.setStyle(style);
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this.updateText();
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this.dirty = false
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};
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// constructor
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PIXI.BitmapText.constructor = PIXI.BitmapText;
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PIXI.BitmapText.prototype = Object.create(PIXI.DisplayObjectContainer.prototype);
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/**
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* Set the copy for the text object
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* @method setText
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* @param {String} text The copy that you would like the text to display
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*/
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PIXI.BitmapText.prototype.setText = function(text)
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{
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this.text = text || " ";
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this.dirty = true;
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};
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/**
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* Set the style of the text
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* @method setStyle
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* @param {Object} style The style parameters
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* @param {String} style.font The size (optional) and bitmap font id (required) eq "Arial" or "20px Arial" (must have loaded previously)
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* @param {String} [style.align="left"] An alignment of the multiline text ("left", "center" or "right")
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*/
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PIXI.BitmapText.prototype.setStyle = function(style)
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{
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style = style || {};
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style.align = style.align || "left";
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this.style = style;
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var font = style.font.split(" ");
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this.fontName = font[font.length - 1];
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this.fontSize = font.length >= 2 ? parseInt(font[font.length - 2], 10) : PIXI.BitmapText.fonts[this.fontName].size;
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this.dirty = true;
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};
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/**
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* Renders text
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* @private
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*/
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PIXI.BitmapText.prototype.updateText = function()
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{
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var data = PIXI.BitmapText.fonts[this.fontName];
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var pos = new PIXI.Point();
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var prevCharCode = null;
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var chars = [];
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var maxLineWidth = 0;
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var lineWidths = [];
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var line = 0;
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var scale = this.fontSize / data.size;
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for(var i = 0; i < this.text.length; i++)
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{
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var charCode = this.text.charCodeAt(i);
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if(/(?:\r\n|\r|\n)/.test(this.text.charAt(i)))
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{
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lineWidths.push(pos.x);
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maxLineWidth = Math.max(maxLineWidth, pos.x);
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line++;
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pos.x = 0;
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pos.y += data.lineHeight;
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prevCharCode = null;
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continue;
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}
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var charData = data.chars[charCode];
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if(!charData) continue;
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if(prevCharCode && charData[prevCharCode])
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{
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pos.x += charData.kerning[prevCharCode];
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}
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chars.push({texture:charData.texture, line: line, charCode: charCode, position: new PIXI.Point(pos.x + charData.xOffset, pos.y + charData.yOffset)});
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pos.x += charData.xAdvance;
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prevCharCode = charCode;
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}
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lineWidths.push(pos.x);
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maxLineWidth = Math.max(maxLineWidth, pos.x);
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var lineAlignOffsets = [];
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for(i = 0; i <= line; i++)
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{
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var alignOffset = 0;
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if(this.style.align == "right")
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{
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alignOffset = maxLineWidth - lineWidths[i];
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}
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else if(this.style.align == "center")
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{
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alignOffset = (maxLineWidth - lineWidths[i]) / 2;
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}
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lineAlignOffsets.push(alignOffset);
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}
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for(i = 0; i < chars.length; i++)
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{
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var c = new PIXI.Sprite(chars[i].texture)//PIXI.Sprite.fromFrame(chars[i].charCode);
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c.position.x = (chars[i].position.x + lineAlignOffsets[chars[i].line]) * scale;
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c.position.y = chars[i].position.y * scale;
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c.scale.x = c.scale.y = scale;
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this.addChild(c);
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}
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this.width = pos.x * scale;
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this.height = (pos.y + data.lineHeight) * scale;
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};
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/**
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* @private
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*/
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PIXI.BitmapText.prototype.updateTransform = function()
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{
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if(this.dirty)
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{
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while(this.children.length > 0)
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{
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this.removeChild(this.getChildAt(0));
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}
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this.updateText();
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this.dirty = false;
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}
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PIXI.DisplayObjectContainer.prototype.updateTransform.call(this);
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};
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PIXI.BitmapText.fonts = {};
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</pre>
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