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28 lines
684 B
Text
28 lines
684 B
Text
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!!ver 130
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// author: lezard //https://blog.sovapps.com/author/lezard/
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// https://blog.sovapps.com/play-with-shaders-black-and-white-part-1/
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#ifdef VERTEX_SHADER
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attribute vec2 v_texcoord;
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varying vec2 v_edge;
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void main ()
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{
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gl_Position = ftetransform();
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v_edge = v_texcoord.xy;
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}
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#endif
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#ifdef FRAGMENT_SHADER
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uniform sampler2D s_t0;
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varying vec2 v_edge;
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varying vec3 graycol;
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uniform vec4 tint = vec4(1,1,1,1);
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void main ()
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{
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gl_FragColor = texture2D(s_t0, v_edge.xy);
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vec4 normalColor = texture2D(s_t0, v_edge.xy);
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float gray = 0.299*normalColor.r + 0.587*normalColor.g + 0.114*normalColor.b;
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gl_FragColor = vec4(gray, gray, gray, normalColor.a);
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}
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#endif
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