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#ifdef GL_FRAGMENT_PRECISION_HIGH
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precision highp float;
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#else
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precision mediump float;
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#endif
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varying vec2 v_texcoord;
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uniform sampler2D tex;
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uniform float alpha;
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void main() {
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gl_FragColor = vec4(texture2D(tex, v_texcoord).rgb, 1.0) * alpha;
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}
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