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31 lines
749 B
GLSL
31 lines
749 B
GLSL
// Advanced Scanlines (CRT) shader, created to use in PPSSPP.
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#ifdef GL_ES
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precision mediump float;
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precision mediump int;
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#endif
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uniform sampler2D sampler0;
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varying vec2 v_texcoord0;
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float amount = 1.0; // suitable range = 0.0 - 1.0
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float intensity = 0.5; // suitable range = 0.0 - 1.0
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void main()
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{
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float pos0 = ((v_texcoord0.y + 1.0) * 170.0*amount);
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float pos1 = cos((fract( pos0 ) - 0.5)*3.1415926*intensity)*1.5;
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vec4 rgb = texture2D( sampler0, v_texcoord0 );
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// slight contrast curve
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vec4 color = rgb*0.5+0.5*rgb*rgb*1.2;
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// color tint
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color *= vec4(0.9,1.0,0.7, 0.0);
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// vignette
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color *= 1.1 - 0.6 * (dot(v_texcoord0 - 0.5, v_texcoord0 - 0.5) * 2.0);
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gl_FragColor.rgba = mix(vec4(0,0,0,0), color, pos1);
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}
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