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penfeizhou / APNG4Android

Android animation support for APNG & Animated WebP & Gif & Animated AVIF, High performance
Apache License 2.0
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我用一个有透明边框的webp动画测试，发现透明边框显示成了白色，能帮忙看下这个问题吗 #45

Closed WuGang-128 closed 4 years ago

WuGang-128 commented 4 years ago

New Issue Checklist

Issue Info

Info Value
Device Info e.g. Huawei Mate 30 pro
System Version e.g. 6.0
APNG4Android Library Version e.g. 1.0.0
Repro rate e.g. all the time (100%) / sometimes x% / only once
Repro with our demo project e.g. does it happen with our demo project?
Demo project link e.g. link to a demo project that highlights the issue

Issue Description and Steps

Please fill in the detailed description of the issue (full output of any stack trace, compiler error, ...) and the steps to reproduce the issue.

penfeizhou commented 4 years ago

WebP支持透明底色的动图，请看下https://isparta.github.io/compare-webp/image/gif_webp/webp/2.webp这个动图，就是透明底色的。

WuGang-128 commented 4 years ago

demo里  word-cup.webp  这个动图显示就有问题，透明区域显示成白色了 gang wu 邮箱：wgnobg@gmail.com 签名由 网易邮箱大师 定制 在2019年11月07日 09:34，osborn 写道： WebP支持动图，请看下https://isparta.github.io/compare-webp/image/gif_webp/webp/2.webp这个动图，就是透明底色的。 — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or unsubscribe.

penfeizhou commented 4 years ago

image 是两个角吗？这个区域确实是白色，因为设置了白色作为动画背景色了

penfeizhou commented 4 years ago

背景色定义：

Background Color: 32 bits (uint32) The default background color of the canvas in [Blue, Green, Red, Alpha] byte order. This color MAY be used to fill the unused space on the canvas around the frames, as well as the transparent pixels of the first frame. Background color is also used when disposal method is 1. Note:

Background color MAY contain a transparency value (alpha), even if the Alpha flag in VP8X chunk is unset.

Viewer applications SHOULD treat the background color value as a hint, and are not required to use it.

The canvas is cleared at the start of each loop. The background color MAY be used to achieve this.

WuGang-128 commented 4 years ago

在魅族M5  note上显示有问题 gang wu 邮箱：wgnobg@gmail.com 签名由 网易邮箱大师 定制 在2019年11月07日 10:08，gang wu 写道： demo里  word-cup.webp  这个动图显示就有问题，透明区域显示成白色了 gang wu 邮箱：wgnobg@gmail.com 签名由 网易邮箱大师 定制 在2019年11月07日 09:34，osborn 写道： WebP支持动图，请看下https://isparta.github.io/compare-webp/image/gif_webp/webp/2.webp这个动图，就是透明底色的。 — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or unsubscribe.

penfeizhou commented 4 years ago

http://a.webpurr.com/Rqa.webp 这个图片背景色被定义为纯白，但在Chrome上背景色是透明色。 我们需要check下自己与chrome的解码逻辑。

WuGang-128 commented 4 years ago

是中间球运动位置 gang wu 邮箱：wgnobg@gmail.com 签名由 网易邮箱大师 定制 在2019年11月07日 11:05，osborn 写道： http://a.webpurr.com/Rqa.webp 这个图片背景色被定义为纯白，但在Chrome上背景色是透明色。 我们需要check一下chrome的解码逻辑。 — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or unsubscribe.

penfeizhou commented 4 years ago

你好，可升级到1.2.0版本，修复了改问题 感谢反馈。