在片段着色器中模糊采样器ExternalOES纹理

Question

I'm running a video on a OpenGL texture and applying multiple image filters to it using a fragment shader.

Code snippet from the shader:

 private static final String fragmentShaderCode =
        "#extension GL_OES_EGL_image_external : require\n" +
        "precision mediump float;" +
        "uniform samplerExternalOES texture;" +
        "varying vec2 v_TexCoordinate;" +
...

I'd like to also blur this, but I only found examples to blur a sampler2D texture, not a samplerExternalOES one.

Is it possible to convert from one to the other? Or how would that work?

Answer 1

You can use this same as sampler2D . You can access texture using texture2D function itself. Apply your blurr filter as if it was a normal texture. It should work.