Unity UI Problem with UI Mask on Android 5 since Unity 2018.3.x

Hi
Since Unity 2018.3.x UI Mask doesn't work on Android 5.0.1.It doesn't draw itself and its children.
Tested on Samsung Galaxy S4 GT-I9500 Android 5.0.1
On Unity 2018.2.x and older everything's ok with mask. It has the issue only on Unity 2018.3.x and with Android 5

How can reproduce the issue.

1. Just create a new project in Unity 2018.3.x (we used 2018.3.6 and 2018.3.7)
2. Switch target on Android
3. In the new empty scene create Canvas, then create UI Mask into the Canvas.
4. Create UI Image as a child object of Mask. Any combinations.
5. Build the project for Android and test on Android version 5

 

2018.3.8 has this issue too

 

Hi. I've replaced clip function in all shaders and it seems working.
From:

Code (CSharp):

1. clip(%value%);

To:

Code (CSharp):

1. bool clip = (%value%) < 0.0f;
2. clip = (int(clip) * int(0xffff))==0;
3. if(!clip)
4.    discard;

It looks like a bug in unity.

 

Hmm, I'll try it!
Thanks a lot Rom4ikq

 

Could you please submit a bug-report as described in this document:
https://unity3d.com/unity/qa/bug-reporting

It's important that you report these issues together with a reproduction project if you want them to get fixed. If you don't do it, it might be a long time until someone else reports them or until Unity Technologies find them.

After you submitted the bug-report, you receive a confirmation email with a bug-report Case number. You can post this Case number here (in this forum thread) for Unity staff to pick up, in case they see it.

 

I already done it: https://fogbugz.unity3d.com/default.asp?1134858_u5l2qgp9bepgsap3
Is it needed to Rom4ikq done the same?

 

Same issue here since upgrading a project from 2018.2 to 2018.3. We experience a few Android devices not drawing scrollview content and other Mask clipped content anymore. OS version 4.4.2 - 5.x (not sure about newer versions). Looks like OpenGLES2 affected only, x86 and arm.

Removing the mask component makes the scrollview render correctly on this affected devices

 

I got same issue. Did they tell anything on fixing it ?

 

Just reproduced on this devices:
- Unity 2018.3.10f1, LENOVO Lenovo A3000-H, PowerVR SGX 544MP, Android 4.4.2
- Unity 2018.3.9f1, ASUS ASUS_T00J, PowerVR SGX 544MP2, Android 4.4.1

any many more PowerVR 544 MP devices...

Just to note:
- There was no problem with 2018.2.20f1
- Everything renders correctly again with 2018.3.9 / 2018.3.10 as soon as we disable the Mask components

 

We got 3 devices reported. All of them are using PowerVR 544

 

2018.2.21 is ok on my tested device (Samsung Galaxy S4 GT-I9500 Android 5.0.1)

 

Guys please vote this issue here https://issuetracker.unity3d.com/is...i-mask-is-not-visible-on-some-android-devices

 

That's a major bug, and very hard to find the causing issue, or a term to search (simply my whole UI wouldnt draw with no log messages, I didnt know where to look, found this by luck), that's why this thread is not flooded with complains.

Please Unity team prioritize this issue, it seems it is being ignored by you guys (20+ days since this thread started and it's a major bug!). I cant update my game in production due to this bug. If I knew about this bug last week I would annoy you guys at GDC to get this fixed.

 

Yes, also rather major for us. We restructure our project to make use of nested prefabs, so can't go back to 2018.2 and have a lot of users complaining with no chance to fix this by ourself...

 

I just noticed the issue is from DECEMBER... holy ****, we're screwed

 

@Rom4ikq can you explain a bit more how to do the solution? Im not familiar with shaders

@Riddik have you tested the solution? Did it work?

 

Not yet.

 

Need to create material with this shader. Add material to the image component, the nearest mask component.

Code (CSharp):

1. // Unity built-in shader source. Copyright (c) 2016 Unity Technologies. MIT license (see license.txt)
2.  
3. Shader "Custom/UI/Default"
4. {
5.     Properties
6.     {
7.         [PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {}
8.         _Color ("Tint", Color) = (1,1,1,1)
9.  
10.         _StencilComp ("Stencil Comparison", Float) = 8
11.         _Stencil ("Stencil ID", Float) = 0
12.         _StencilOp ("Stencil Operation", Float) = 0
13.         _StencilWriteMask ("Stencil Write Mask", Float) = 255
14.         _StencilReadMask ("Stencil Read Mask", Float) = 255
15.  
16.         _ColorMask ("Color Mask", Float) = 15
17.  
18.         [Toggle(UNITY_UI_ALPHACLIP)] _UseUIAlphaClip ("Use Alpha Clip", Float) = 0
19.     }
20.  
21.     SubShader
22.     {
23.         Tags
24.         {
25.             "Queue"="Transparent"
26.             "IgnoreProjector"="True"
27.             "RenderType"="Transparent"
28.             "PreviewType"="Plane"
29.             "CanUseSpriteAtlas"="True"
30.         }
31.  
32.         Stencil
33.         {
34.             Ref [_Stencil]
35.             Comp [_StencilComp]
36.             Pass [_StencilOp]
37.             ReadMask [_StencilReadMask]
38.             WriteMask [_StencilWriteMask]
39.         }
40.  
41.         Cull Off
42.         Lighting Off
43.         ZWrite Off
44.         ZTest [unity_GUIZTestMode]
45.         Blend SrcAlpha OneMinusSrcAlpha
46.         ColorMask [_ColorMask]
47.  
48.         Pass
49.         {
50.             Name "Default"
51.         CGPROGRAM
52.             #pragma vertex vert
53.             #pragma fragment frag
54.             #pragma target 2.0
55.  
56.             #include "UnityCG.cginc"
57.             #include "UnityUI.cginc"
58.  
59.             #pragma multi_compile __ UNITY_UI_CLIP_RECT
60.             #pragma multi_compile __ UNITY_UI_ALPHACLIP
61.  
62.             struct appdata_t
63.             {
64.                 float4 vertex   : POSITION;
65.                 float4 color    : COLOR;
66.                 float2 texcoord : TEXCOORD0;
67.                 UNITY_VERTEX_INPUT_INSTANCE_ID
68.             };
69.  
70.             struct v2f
71.             {
72.                 float4 vertex   : SV_POSITION;
73.                 fixed4 color    : COLOR;
74.                 float2 texcoord  : TEXCOORD0;
75.                 float4 worldPosition : TEXCOORD1;
76.                 UNITY_VERTEX_OUTPUT_STEREO
77.             };
78.  
79.             sampler2D _MainTex;
80.             fixed4 _Color;
81.             fixed4 _TextureSampleAdd;
82.             float4 _ClipRect;
83.             float4 _MainTex_ST;
84.  
85.             v2f vert(appdata_t v)
86.             {
87.                 v2f OUT;
88.                 UNITY_SETUP_INSTANCE_ID(v);
89.                 UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(OUT);
90.                 OUT.worldPosition = v.vertex;
91.                 OUT.vertex = UnityObjectToClipPos(OUT.worldPosition);
92.  
93.                 OUT.texcoord = TRANSFORM_TEX(v.texcoord, _MainTex);
94.  
95.                 OUT.color = v.color * _Color;
96.                 return OUT;
97.             }
98.  
99.             fixed4 frag(v2f IN) : SV_Target
100.             {
101.                 half4 color = (tex2D(_MainTex, IN.texcoord) + _TextureSampleAdd) * IN.color;
102.  
103.                 #ifdef UNITY_UI_CLIP_RECT
104.                 color.a *= UnityGet2DClipping(IN.worldPosition.xy, _ClipRect);
105.                 #endif
106.  
107.                 #ifdef UNITY_UI_ALPHACLIP
108.                
109.                 bool a = color.a - 0.001 < 0.0f;
110.                 a = (int(a) * int(0xffff))==0;
111.                 if(!a)
112.                     discard;
113.              
114.                 #endif
115.  
116.                 return color;
117.             }
118.         ENDCG
119.         }
120.     }
121. }
122.  

 

Wtf, our issue has just been deleted. Page no longer exists. If it merged with another issue it should at least redirect, or show a message explaining the merge.

https://issuetracker.unity3d.com/is...i-mask-is-not-visible-on-some-android-devices

Anyone has any idea why?? This is very strange!

Issue ID was 1106269

 

I talked with Unity QA support and they said the vanishing issue was a problem caused by they trying to change the target version of the issue from 2019.2 to 2018.3, but the issue is still alive and fixed and should be rolled out in a future 2018.3 version (exactly which is not known yet).
So, great news!

 

Same bug (sprite mask just not works) at
Samsung Galaxy Tab 2 ANDROID 4.2.2
GPU PowerVR SGX540

And can't reproduce at mobile device:
HTC with TEGRA GPU and same ANDROID 4.2.2

Please fix it. Bug start from 2018.3.x version at 2018.2.19 all works great

 

According to issue tracker fix will be in 2018.3.14

 

They marked as Fixed in Unity 2018.3.9f1 but it says Fix will be in Unity 2018.3.14 . I am confused

 

Where did you see that?

 

https://issuetracker.unity3d.com/is...i-mask-is-not-visible-on-some-android-devices

 

Thanks!!

"

Resolution Note:
Fix will be in Unity 2018.3.14
"

 

Fix will be in Unity 2018.3.14, but they just forgot to tell when will that version be released

According to Unity's weekly release schedule it should have been released 2 days ago, but for some undisclosed reason this week's release is delayed... again.

 

Still not working on 2019.2 and 2018.4.5f
Samsung Galaxy J4+

 

Still not working on 2019.1.5 and 2019.2.12.
Samsung GalaxyTab A SM-T380 Android 9.

 

Our QA doesn't meet this bug on android, but iPad4, iPad mini, iPad2 - same problem. We used 2018.2.8f1 - all works; 2018.3.1f1 - sorry, cant remember, but now we use 2019.2.0f1 and it doesn't work. And near half-year I can't find any mention about problem with iOS and SpriteMask (errr, there was 1 mention in deeps of google pages, ok).

 

Hello again, I've got answer on this bug:
"Hi,
Thanks for getting in touch, we actually know about this issue and are tracking progress here:"

https://issuetracker.unity3d.com/is...-graphics-api-on-older-ios-devices-a7-a8-socs

Guys, I don't know abcolutely this bug and bug on Android are the same, but I think it may be. So, if you want, you vote for this, maybe? Thanks.

 

still not working in 2019.4.15f1 LTS
Samsung J4+

edit: i found this and works like a charm https://github.com/mob-sakai/SoftMaskForUGUI

 

Same here on 2019.3.15. Worked fine on most Android devices but Huawei Y4 had an issue when Unity UI Mask component didn't work at all, while SoftMask worked. Replaced all Mask to SoftMask. That Unity... give me back my time