主要是包含两个类别 TextWrapper, BitmapText
TextWrapper 只是 TextField 的外覆类别
真正在做点阵绘图的是 BitmapText
由于 AS3 TextField 成员属性与方法相当多
我已经很尽量的复写大部分的方法了
TextWrapper Class：
/*
TextWrapper AS3 v0.0.2
Date: 2007.04.25
作者: Ticore Shih
Blog：http://ticore.blogspot.com
EMail: swl@ms53.url.com.tw
v0.0.1
继承 Sprite 包覆一个 TextField
v0.0.2
增加 TextField 一般性方法
*/
package com.ticore.text {
import flash.geom.*;
import flash.display.*;
import flash.text.*;
import flash.events.*;
public class TextWrapper extends Sprite {
//
// Protected Property
//
protected var _txt_:TextField;
//
// Constructor
//
public function TextWrapper() {
init();
}
protected function init():void {
_txt_ = new TextField();
this.addChild(_txt_);
}
//
// Override DisplayObject Property and Method
//
public override function set width(w:Number):void {
_txt_.width = w;
}
public override function get width():Number {
return _txt_.width;
}
public override function set height(h:Number):void {
_txt_.height = h;
}
public override function get height():Number {
return _txt_.height;
}
//
// Proxy Common TextField Property
//
public function set antiAliasType(value:String):void {
_txt_.antiAliasType = value;
}
public function get antiAliasType():String {
return _txt_.antiAliasType;
}
public function set autoSize(value:String):void {
_txt_.autoSize = value;
}
public function get autoSize():String {
return _txt_.autoSize;
}
public function set gridFitType(value:String):void {
_txt_.gridFitType = value;
}
public function get gridFitType():String {
return _txt_.gridFitType;
}
public function set htmlText(value:String):void {
_txt_.htmlText = value;
}
public function get htmlText():String {
return _txt_.htmlText;
}
public function set restrict(value:String):void {
_txt_.restrict = value;
}
public function get restrict():String {
return _txt_.restrict;
}
public function set text(txt:String):void {
_txt_.text = txt;
}
public function get text():String {
return _txt_.text;
}
public function set type(type:String):void {
_txt_.type = type;
}
public function get type():String {
return _txt_.type;
}
public function set backgroundColor(value:uint):void {
_txt_.backgroundColor = value;
}
public function get backgroundColor():uint {
return _txt_.backgroundColor;
}
public function set borderColor(value:uint):void {
_txt_.borderColor = value;
}
public function get borderColor():uint {
return _txt_.borderColor;
}
public function set textColor(value:uint):void {
_txt_.textColor = value;
}
public function get textColor():uint {
return _txt_.textColor;
}
public function get bottomScrollV():int {
return _txt_.bottomScrollV;
}
public function get caretIndex():int {
return _txt_.caretIndex;
}
public function get length():int {
return _txt_.length;
}
public function get maxChars():int {
return _txt_.maxChars;
}
public function get maxScrollH():int {
return _txt_.maxScrollH;
}
public function get maxScrollV():int {
return _txt_.maxScrollV;
}
public function get numLines():int {
return _txt_.numLines;
}
public function get selectionBeginIndex():int {
return _txt_.selectionBeginIndex;
}
public function get selectionEndIndex():int {
return _txt_.selectionEndIndex;
}
public function set sharpness(value:Number):void {
_txt_.sharpness = value;
}
public function get sharpness():Number {
return _txt_.sharpness;
}
public function set thickness(value:Number):void {
_txt_.thickness = value;
}
public function get thickness():Number {
return _txt_.thickness;
}
public function get textHeight():Number {
return _txt_.textHeight;
}
public function get textWidth():Number {
return _txt_.textWidth;
}
public function set alwaysShowSelection(value:Boolean):void {
_txt_.alwaysShowSelection = value;
}
public function get alwaysShowSelection():Boolean {
return _txt_.alwaysShowSelection;
}
public function set border(value:Boolean):void {
_txt_.border = value;
}
public function get border():Boolean {
return _txt_.border;
}
public function set condenseWhite(value:Boolean):void {
_txt_.condenseWhite = value;
}
public function get condenseWhite():Boolean {
return _txt_.condenseWhite;
}
public function set displayAsPassword(value:Boolean):void {
_txt_.displayAsPassword = value;
}
public function get displayAsPassword():Boolean {
return _txt_.displayAsPassword;
}
public function set embedFonts(value:Boolean):void {
_txt_.embedFonts = value;
}
public function get embedFonts():Boolean {
return _txt_.embedFonts;
}
public function set mouseWheelEnabled(value:Boolean):void {
_txt_.mouseWheelEnabled = value;
}
public function get mouseWheelEnabled():Boolean {
return _txt_.mouseWheelEnabled;
}
public function set multiline(value:Boolean):void {
_txt_.multiline = value;
}
public function get multiline():Boolean {
return _txt_.multiline;
}
public function set selectable(value:Boolean):void {
_txt_.selectable = value;
}
public function get selectable():Boolean {
return _txt_.selectable;
}
public function set useRichTextClipboard(value:Boolean):void {
_txt_.useRichTextClipboard = value;
}
public function get useRichTextClipboard():Boolean {
return _txt_.useRichTextClipboard;
}
public function set wordWrap(value:Boolean):void {
_txt_.wordWrap = value;
}
public function get wordWrap():Boolean {
return _txt_.wordWrap;
}
//
// Proxy Common TextField Method
//
public function appendText(text:String):void {
_txt_.appendText(text);
}
public function getCharBoundaries(charIndex:int):Rectangle {
return _txt_.getCharBoundaries(charIndex);
}
public function getCharIndexAtPoint(x:Number, y:Number):int {
return _txt_.getCharIndexAtPoint(x,y);
}
public function getFirstCharInParagraph(charIndex:int):int {
return _txt_.getFirstCharInParagraph(charIndex);
}
public function getImageReference(id:String):DisplayObject {
return _txt_.getImageReference(id);
}
public function getLineIndexAtPoint(x:Number, y:Number):int {
return _txt_.getLineIndexAtPoint(x,y);
}
public function getLineIndexOfChar(charIndex:int):int {
return _txt_.getLineIndexOfChar(charIndex);
}
public function getLineLength(lineIndex:int):int {
return _txt_.getLineLength(lineIndex);
}
public function getLineMetrics(lineIndex:int):TextLineMetrics {
return _txt_.getLineMetrics(lineIndex);
}
public function getLineOffset(lineIndex:int):int {
return _txt_.getLineOffset(lineIndex);
}
public function getLineText(lineIndex:int):String {
return _txt_.getLineText(lineIndex);
}
public function getParagraphLength(charIndex:int):int {
return _txt_.getParagraphLength(charIndex);
}
public function replaceSelectedText(value:String):void {
_txt_.replaceSelectedText(value);
}
public function replaceText(beginIndex:int, endIndex:int, newText:String):void {
_txt_.replaceText(beginIndex,endIndex,newText);
}
public function setTextFormat(format:TextFormat, beginIndex:int = -1, endIndex:int = -1):void {
_txt_.setTextFormat(format,beginIndex,endIndex);
}
public function getTextFormat(beginIndex:int = -1, endIndex:int = -1):TextFormat {
return _txt_.getTextFormat(beginIndex,endIndex);
}
public function set defaultTextFormat(format:TextFormat):void {
_txt_.defaultTextFormat = format;
}
public function get defaultTextFormat():TextFormat {
return _txt_.defaultTextFormat;
}
}
}
BitmapText Class：
/*
BitmapText AS3 v0.0.4
Date: 2007.04.25
作者: Ticore Shih
Blog：http://ticore.blogspot.com
EMail: swl@ms53.url.com.tw
v0.0.1
利用 BitmapData draw TextFIeld
达到可以呈现旋转文字的效果
v0.0.2
增加 TextField 一般性方法与属性控制
增加 validate 属性，减少不必要 draw 次数
TextField.autoSize 功能会有一些问题
TextField 大小会一直跳动，重复 draw 会发生多重图象
v0.0.3
增加 TextField 一般性方法与属性控制
v0.0.4
重构将 TextWrapper 功能独立为单一 Class
*/
package com.ticore.text {
import flash.geom.*;
import flash.display.*;
import flash.text.*;
import flash.events.*;
import flash.filters.*;
public class BitmapText extends TextWrapper {
// Private Property
private var _validate_:Boolean = true;
private var magniFactor:Number = 3;
private var blurFilter:BlurFilter;
private var _useBitmapText_:Boolean = true;
private var bmpData:BitmapData;
private var bmp:Bitmap;
public function BitmapText() {
init();
}
protected override function init():void {
super.init();
_txt_.addEventListener(Event.CHANGE, onChange);
bmp = new Bitmap();
bmp.smoothing = true;
bmp.scaleX = bmp.scaleY = 1 / magniFactor;
this.addChild(bmp);
_txt_.visible = false;
this.addChild(_txt_);
blurFilter = new BlurFilter(1 + magniFactor / 6, 1 + magniFactor / 6, BitmapFilterQuality.MEDIUM);
validate = false;
addEventListener(Event.ENTER_FRAME, onEnterFame);
}
//
// Private Method
//
private function updateBmpData():void {
if (bmpData) {
bmpData.dispose();
}
bmpData = new BitmapData((width + 1) * magniFactor, (height + 1) * magniFactor, true, 0x00000000);
bmp.bitmapData = bmpData;
bmp.smoothing = true;
validate = false;
}
private function onChange(eventObj:Event):void {
validate = false;
}
private function onEnterFame(eventObj:Event):void {
if (!validate) {
draw();
}
}
private function draw():void {
if (bmpData == null) {
updateBmpData();
}
if (bmpData.width < (width + 1) * magniFactor || bmpData.height < (height + 1) * magniFactor) {
updateBmpData();
}
var rect:Rectangle = new Rectangle(_txt_.x, _txt_.y, _txt_.width, _txt_.height);
bmpData.fillRect(bmpData.rect, 0x00000000);
var xOffset:Number = -_txt_.x;
var dev:Number = magniFactor / 3;
bmpData.draw(_txt_, new Matrix(magniFactor, 0, 0, magniFactor, xOffset * magniFactor + 0, 0));
bmpData.draw(_txt_, new Matrix(magniFactor, 0, 0, magniFactor, xOffset * magniFactor + dev, 0));
bmpData.draw(_txt_, new Matrix(magniFactor, 0, 0, magniFactor, xOffset * magniFactor + 0, dev));
bmpData.applyFilter(bmpData, bmpData.rect, new Point(0, 0), blurFilter);
bmpData.draw(_txt_, new Matrix(magniFactor, 0, 0, magniFactor, xOffset * magniFactor + dev / 2, dev / 2));
bmp.x = _txt_.x;
bmp.y = _txt_.y;
validate = true;
}
//
// Public Method
//
public function set validate(value:Boolean):void {
_validate_ = value;
}
public function get validate():Boolean {
return _validate_;
}
public function set useBitmapText(value:Boolean):void {
_useBitmapText_ = value;
_txt_.visible = !value;
bmp.visible = value;
}
public function get useBitmapText():Boolean {
return _useBitmapText_;
}
//
// Override Method
//
public override function set width(w:Number):void {
super.width = w;
validate = false;
}
public override function set height(h:Number):void {
super.height = h;
validate = false;
}
public override function appendText(text:String):void {
super.appendText(text);
validate = false;
}
public override function replaceSelectedText(value:String):void {
super.replaceSelectedText(value);
validate = false;
}
public override function replaceText(beginIndex:int, endIndex:int, newText:String):void {
super.replaceText(beginIndex,endIndex,newText);
validate = false;
}
public override function setTextFormat(format:TextFormat, beginIndex:int = -1, endIndex:int = -1):void {
super.setTextFormat(format,beginIndex,endIndex);
validate = false;
}
public override function set defaultTextFormat(format:TextFormat):void {
super.defaultTextFormat = format;
validate = false;
}
public override function set antiAliasType(value:String):void {
super.antiAliasType = value;
validate = false;
}
public override function set autoSize(value:String):void {
super.autoSize = value;
validate = false;
}
public override function set gridFitType(value:String):void {
super.gridFitType = value;
validate = false;
}
public override function set htmlText(value:String):void {
super.htmlText = value;
validate = false;
}
public override function set restrict(value:String):void {
super.restrict = value;
validate = false;
}
public override function set text(value:String):void {
super.text = value;
validate = false;
}
public override function set backgroundColor(value:uint):void {
super.backgroundColor = value;
validate = false;
}
public override function set borderColor(value:uint):void {
super.borderColor = value;
validate = false;
}
public override function set textColor(value:uint):void {
super.textColor = value;
validate = false;
}
public override function set sharpness(value:Number):void {
super.sharpness = value;
validate = false;
}
public override function set thickness(value:Number):void {
super.thickness = value;
validate = false;
}
public override function set alwaysShowSelection(value:Boolean):void {
super.alwaysShowSelection = value;
validate = false;
}
public override function set border(value:Boolean):void {
super.border = value;
validate = false;
}
public override function set condenseWhite(value:Boolean):void {
super.condenseWhite = value;
validate = false;
}
public override function set displayAsPassword(value:Boolean):void {
super.displayAsPassword = value;
validate = false;
}
public override function set embedFonts(value:Boolean):void {
super.embedFonts = value;
validate = false;
}
public override function set multiline(value:Boolean):void {
super.multiline = value;
validate = false;
}
public override function set selectable(value:Boolean):void {
super.selectable = value;
validate = false;
}
public override function set wordWrap(value:Boolean):void {
super.wordWrap = value;
validate = false;
}
}
}
测试程序如下：
import com.ticore.text.*;
var bmpTxt:BitmapText = new BitmapText();
this.addChild(bmpTxt);
bmpTxt.border = true;
bmpTxt.multiline = true;
bmpTxt.rotation = 0;
bmpTxt.wordWrap = true;
bmpTxt.rotation = 15;
bmpTxt.width = 320;
bmpTxt.height = 250;
bmpTxt.x = 170;
bmpTxt.y = 30;
var format:TextFormat = bmpTxt.getTextFormat();
format.font = "新细明体";
format.align = "center";
for (var i:Number = 6; i <= 22; format.size=i; bmpTxt.defaultTextFormat=format; bmpTxt.appendText("Font Size format.size 新细明体\n");>
原始文件下载
实际运行效果撷图：
看起来应该还不错吧！
即使在旋转状态下也没有很严重的锯齿
我特别在绘制位图步骤提升了分辨率
并且作了偏移绘制，套用滤镜
当然这些动作是会消耗效能的
所以只有在必要时才会进行重绘的动作
