21 lines
436 B
Plaintext
21 lines
436 B
Plaintext
#ifdef GL_ES
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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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#endif
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uniform sampler2D tex;
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varying vec4 col;
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varying vec2 tex_c;
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void main()
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{
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vec3 inp = texture2D(tex,tex_c.xy).rgb;
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vec4 sep;
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sep.r = dot(inp, vec3(.393, .769, .189));
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sep.g = dot(inp, vec3(.349, .686, .168));
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sep.b = dot(inp, vec3(.272, .534, .131));
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sep.a = texture2D(tex,tex_c.xy).a;
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gl_FragColor = sep * col;
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}
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