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11 lines
252 B
11 lines
252 B
#ifdef GL_ES
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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 U_Texture;
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void main()
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{
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vec4 color=texture2D(U_Texture,V_Texcoord);
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float gray=(color.r+color.g+color.b)/3.0;
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gl_FragColor=vec4(gray,gray,gray,1.0);
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}
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