qt-everywhere-src-5.14.1/qtwayland/src/compositor/shaders/surface_oes_external.frag

#extension GL_OES_EGL_image_external : require
varying highp vec2 v_texcoord;
uniform highp samplerExternalOES tex0;
uniform lowp float qt_Opacity;

void main() {
   gl_FragColor = qt_Opacity * texture2D(tex0, v_texcoord);
}