dragonbones-runtime
Version:
the tools to build dragonbones file for diffrent framework
205 lines (183 loc) • 7.54 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 {
let displayListPool: DisplayList[] = [];
let blendModes = ["source-over", "lighter", "destination-out"];
let defaultCompositeOp = "source-over";
/**
* @private
* 显示列表
*/
export class DisplayList extends HashObject {
/**
* 创建一个DisplayList对象，若内存不足或无法创建RenderBuffer，将会返回null。
*/
public static create(target: DisplayObject): DisplayList {
let displayList = new egret.sys.DisplayList(target);
try {
let buffer = new RenderBuffer();
displayList.renderBuffer = buffer;
}
catch (e) {
return null;
}
displayList.root = target;
return displayList;
}
/**
* @private
* 创建一个DisplayList对象
*/
public constructor(root: DisplayObject) {
super();
this.root = root;
this.isStage = (root instanceof Stage);
}
private isStage: boolean = false;
/**
* 位图渲染节点
*/
$renderNode: RenderNode = new BitmapNode();
/**
* @private
* 获取渲染节点
*/
$getRenderNode(): sys.RenderNode {
return this.$renderNode;
}
/**
* @private
*/
public renderBuffer: RenderBuffer = null;
/**
* @private
*/
public offsetX: number = 0;
/**
* @private
*/
public offsetY: number = 0;
/**
* @private
*/
private offsetMatrix: Matrix = new Matrix();
/**
* @private
* 显示列表根节点
*/
public root: DisplayObject;
public needUpdateRegions: boolean = false;
/**
* @private
* 设置剪裁边界，不再绘制完整目标对象，画布尺寸由外部决定，超过边界的节点将跳过绘制。
*/
public setClipRect(width: number, height: number): void {
width *= DisplayList.$canvasScaleX;
height *= DisplayList.$canvasScaleY;
this.renderBuffer.resize(width, height);
}
public $canvasScaleX: number = 1;
public $canvasScaleY: number = 1;
/**
* @private
* 绘制根节点显示对象到目标画布，返回draw的次数。
*/
public drawToSurface(): number {
let drawCalls = 0;
this.$canvasScaleX = this.offsetMatrix.a = DisplayList.$canvasScaleX;
this.$canvasScaleY = this.offsetMatrix.d = DisplayList.$canvasScaleY;
if (!this.isStage) {//对非舞台画布要根据目标显示对象尺寸改变而改变。
this.changeSurfaceSize();
}
let buffer = this.renderBuffer;
buffer.clear();
drawCalls = systemRenderer.render(this.root, buffer, this.offsetMatrix);
if (!this.isStage) {//对非舞台画布要保存渲染节点。
let surface = buffer.surface;
let renderNode = <BitmapNode>this.$renderNode;
renderNode.drawData.length = 0;
let width = surface.width;
let height = surface.height;
if (!this.bitmapData) {
this.bitmapData = new egret.BitmapData(surface);
}
else {
this.bitmapData.source = surface;
this.bitmapData.width = width;
this.bitmapData.height = height;
}
renderNode.image = this.bitmapData;
renderNode.imageWidth = width;
renderNode.imageHeight = height;
renderNode.drawImage(0, 0, width, height, -this.offsetX, -this.offsetY, width / this.$canvasScaleX, height / this.$canvasScaleY);
}
return drawCalls;
}
private bitmapData: egret.BitmapData;
/**
* @private
* 改变画布的尺寸，由于画布尺寸修改会清空原始画布。所以这里将原始画布绘制到一个新画布上，再与原始画布交换。
*/
public changeSurfaceSize(): void {
let root = this.root;
let oldOffsetX = this.offsetX;
let oldOffsetY = this.offsetY;
let bounds = this.root.$getOriginalBounds();
var scaleX = this.$canvasScaleX;
var scaleY = this.$canvasScaleY;
this.offsetX = -bounds.x;
this.offsetY = -bounds.y;
this.offsetMatrix.setTo(this.offsetMatrix.a, 0, 0, this.offsetMatrix.d, this.offsetX, this.offsetY);
let buffer = this.renderBuffer;
//在chrome里，小等于256*256的canvas会不启用GPU加速。
let width = Math.max(257, bounds.width * scaleX);
let height = Math.max(257, bounds.height * scaleY);
if (this.offsetX == oldOffsetX &&
this.offsetY == oldOffsetY &&
buffer.surface.width == width &&
buffer.surface.height == height) {
return;
}
buffer.resize(width, height);
}
public static $canvasScaleFactor: number = 1;
/**
* @private
*/
public static $canvasScaleX: number = 1;
public static $canvasScaleY: number = 1;
/**
* @private
*/
public static $setCanvasScale(x: number, y: number): void {
DisplayList.$canvasScaleX = x;
DisplayList.$canvasScaleY = y;
}
}
}