dragonbones-runtime/.cache/egret-core-5.1.0/docs/en/release-note/previous-version/1.7.1_ReleaseNotes.md

the tools to build dragonbones file for diffrent framework

Egret 1.7.1 Release Note
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Last Updated：8 May, 2015

Welcome to Egret Engine !

Special Thanks to：

* Joy of Fish Information Technology Co.,Ltd.
* Nanjing Nibaguai Networking Technology Co.,Ltd.
* Beijing Smallapple Networking Technology Co.,Ltd.
* MiTalk Team, XiaoMi Tech.
* Wish Start （Beijing）Technology Co.,Ltd.
* Front-end team, games business department, Huanju Time Inc.
* Beijing Duo Fang Lajiao Networking Technology Co.,Ltd.
* Kaiteng Workshop，Kaixin Networking Technology Co.,Ltd.

## Overview

Egret 1.7.1 Community Experienced Version is the 1st CE version after Egret Engine 1.7 official release.In this version, we've mainly focused on bug fix.
Note: Community Trial Version includes all the features in the latest final version and some up-to-date fixes and updates.

## Updated Items:


#### Core Display Lists:

* Fix the bug that RenderTexture cannot draw in some browsers
* Adding texture release function, Textures can be released by RES.destroyRes
* Solved frame rate decrease resulted from too much IOS texture

#### Command line tool



#### Third-party libraries

* Adjusts the directory structure

#### Egret Android Support

* Reduced text module's usage of memory
* Optimized game downloading and unzipping
* Optimized texture memory management
* Fixed the bug of multiple memory leaks
* Fixed a thread lock bug
* Downloading failure on some types of devices
* RenderTexture cannot be created on some types of devices.


#### Known Issues:

* Android Graphics API currently only supports simple line-drawing actions.
* Android TextField API does not support bold and italic font.
* iOS Support now only supports iOS7+ versions.