Use GPUImageFilterGroup causes confusion in the background

[xiandanin]

When I use GPUImageFilterGroup, the background has a lot of clutter.

The first time the set group does not have a problem,after the second time, the set group background is confused..

I use ScaleType.CENTER_INSIDE

GPUImageFilterGroup group = new GPUImageFilterGroup();
group.addFilter(new GPUImageSaturationFilter(1.3f));
group.addFilter(new GPUImageBrightnessFilter(0.2f));
group.addFilter(new GPUImageContrastFilter(1.3f));
group.addFilter(new GPUImageWhiteBalanceFilter(5000f,2f));
surfaceView.setFilter(group);

[xuzhiyong017]

I have the same problem.

[ZongwenSun]

there are two ways to fix this problem.

1. use GPUImageView.setRatio((float)bitmap.getWidth() / bitmap.getHeight()), this can make the size of GPUImageView the same with the bitmap.
2. in GPUImageFilter.onDraw method, add "GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT | GLES20.GL_DEPTH_BUFFER_BIT)"

[xiandanin]

@ZongwenSun it works，give you 👍

[JarvisBuop]

same problem, thanks

[wasim15185]

I have same problem it's not working help me please . I have stuck from 3 days

My Problems

1. When slider value is less than 1.0f (means <1.0f) then white shadow is appearing out side of Image ( Basically in GPUImageContrastFilter)
   preview
   

2. When app is running in background and back to app then image broken which was described previously in this issue

   preview (if you not able to see please zoom green area)
   

XML

<jp.co.cyberagent.android.gpuimage.GPUImageView
            android:id="@+id/photoViewId"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            app:gpuimage_show_loading="false"
            app:gpuimage_surface_type="texture_view"
            app:layout_constraintBottom_toTopOf="@+id/sliderId"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

in Code

private val scaleType = GPUImage.ScaleType.CENTER_INSIDE;

binding.photoViewId.setScaleType(scaleType)

What did I apply for those problem

I applied two ways which was discussed in this issue , both are not working for me

1. first , binding.photoViewId.setRatio((adjustViewModel.imgWidth.value!!/adjustViewModel.imgHeight.value!!).toFloat()) this is
   decrease height and width of photo size .

2. second , i did not get how to add GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT | GLES20.GL_DEPTH_BUFFER_BIT) in GPUImageFilter.onDraw method . Though I applied a technique , I created a New Class which extends GPUImageFilter class and inside overridden onDraw method added GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT | GLES20.GL_DEPTH_BUFFER_BIT) then apply with in GpuImageView then photo is turning black