refactor into files

src/main/assets/quad.fs.glsl

@@ -0,0 +1,14 @@
+#version 300 es
+#extension GL_OES_EGL_image_external_essl3 : require
+
+precision mediump float;
+
+uniform samplerExternalOES uTexture;
+
+in vec2 vTexCoord;
+out vec4 fragColor;
+
+void main()
+{
+    fragColor = texture(uTexture, vTexCoord);
+}

src/main/assets/quad.vs.glsl

@@ -0,0 +1,12 @@
+#version 300 es
+
+layout(location = 0) in vec4 aPosition;
+layout(location = 1) in vec2 aTexCoord;
+
+out vec2 vTexCoord;
+
+void main()
+{
+    gl_Position = aPosition;
+    vTexCoord = aTexCoord;
+}