dragonbones-runtime
Version:
the tools to build dragonbones file for diffrent framework
182 lines (173 loc) • 7.15 kB
text/typescript
//////////////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2014-present, Egret Technology.
// All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of the Egret nor the
// names of its contributors may be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY EGRET AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
// OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
// IN NO EVENT SHALL EGRET AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;LOSS OF USE, DATA,
// OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
// EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
//////////////////////////////////////////////////////////////////////////////////////
namespace egret.sys {
/**
* @private
* 屏幕适配器接口，当播放器视口尺寸改变时，屏幕适配器将被用于计算当前对应的舞台显示尺寸。
*/
export interface IScreenAdapter{
/**
* @private
* 计算舞台显示尺寸
* @param scaleMode 当前的缩放模式
* @param screenWidth 播放器视口宽度
* @param screenHeight 播放器视口高度
* @param contentWidth 初始化内容宽度
* @param contentHeight 初始化内容高度
*/
calculateStageSize(scaleMode:string,screenWidth:number,screenHeight:number,
contentWidth:number, contentHeight:number):StageDisplaySize;
}
/**
* @private
* 舞台显示尺寸数据
*/
export interface StageDisplaySize{
/**
* @private
* 舞台宽度
*/
stageWidth:number;
/**
* @private
* 舞台高度
*/
stageHeight:number;
/**
* @private
* 显示宽度，若跟舞台宽度不同，将会产生缩放。
*/
displayWidth:number;
/**
* @private
* 显示高度，若跟舞台高度不同，将会产生缩放。
*/
displayHeight:number;
}
/**
* @private
* 屏幕适配器实例，开发者可以通过给这个变量赋值实现了IScreenAdapter接口的实例，从而注入自定义的屏幕适配器。
*/
export let screenAdapter:IScreenAdapter;
/**
* @private
* 屏幕适配器默认实现，开发者可以实现自定义规则的屏幕适配器。并在初始化加载时将适配器的实例赋值给egret.sys.screenAdapter上，从而替换掉默认适配器。
*/
export class DefaultScreenAdapter extends HashObject implements IScreenAdapter {
/**
* @private
*/
public constructor() {
super();
}
/**
* @private
* 计算舞台显示尺寸
* @param scaleMode 当前的缩放模式
* @param screenWidth 播放器视口宽度
* @param screenHeight 播放器视口高度
* @param contentWidth 初始化内容宽度
* @param contentHeight 初始化内容高度
*/
public calculateStageSize(scaleMode:string, screenWidth:number, screenHeight:number,
contentWidth:number, contentHeight:number):StageDisplaySize {
let displayWidth = screenWidth;
let displayHeight = screenHeight;
let stageWidth = contentWidth;
let stageHeight = contentHeight;
let scaleX = (screenWidth / stageWidth) || 0;
let scaleY = (screenHeight / stageHeight) || 0;
switch (scaleMode) {
case StageScaleMode.EXACT_FIT:
break;
case StageScaleMode.FIXED_HEIGHT:
stageWidth = Math.round(screenWidth / scaleY);
break;
case StageScaleMode.FIXED_WIDTH:
stageHeight = Math.round(screenHeight / scaleX);
break;
case StageScaleMode.NO_BORDER:
if (scaleX > scaleY) {
displayHeight = Math.round(stageHeight * scaleX);
}
else {
displayWidth = Math.round(stageWidth * scaleY);
}
break;
case StageScaleMode.SHOW_ALL:
if (scaleX > scaleY) {
displayWidth = Math.round(stageWidth * scaleY);
}
else {
displayHeight = Math.round(stageHeight * scaleX);
}
break;
case StageScaleMode.FIXED_NARROW:
if (scaleX > scaleY) {
stageWidth = Math.round(screenWidth / scaleY);
}
else {
stageHeight = Math.round(screenHeight / scaleX);
}
break;
case StageScaleMode.FIXED_WIDE:
if (scaleX > scaleY) {
stageHeight = Math.round(screenHeight / scaleX);
}
else {
stageWidth = Math.round(screenWidth / scaleY);
}
break;
default :
stageWidth = screenWidth;
stageHeight = screenHeight;
break;
}
//宽高不是2的整数倍会导致图片绘制出现问题
if (stageWidth % 2 != 0) {
stageWidth += 1;
}
if (stageHeight % 2 != 0) {
stageHeight += 1;
}
if(displayWidth % 2 != 0) {
displayWidth += 1;
}
if(displayHeight % 2 != 0) {
displayHeight += 1;
}
return {
stageWidth: stageWidth,
stageHeight: stageHeight,
displayWidth: displayWidth,
displayHeight: displayHeight
};
}
}
}