25 lines
709 B
GLSL
25 lines
709 B
GLSL
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//!DESC unsharp-masking_blur
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//!HOOK MAIN
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//!BIND HOOKED
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#define BLUR -1.0 // terrible when below -2
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vec4 hook()
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{
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const float st1 = 1.2;
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vec4 p = HOOKED_tex(HOOKED_pos);
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vec4 sum1 = HOOKED_texOff(st1 * vec2(+1, +1))
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+ HOOKED_texOff(st1 * vec2(+1, -1))
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+ HOOKED_texOff(st1 * vec2(-1, +1))
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+ HOOKED_texOff(st1 * vec2(-1, -1));
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const float st2 = 1.5;
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vec4 sum2 = HOOKED_texOff(st2 * vec2(+1, 0))
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+ HOOKED_texOff(st2 * vec2( 0, +1))
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+ HOOKED_texOff(st2 * vec2(-1, 0))
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+ HOOKED_texOff(st2 * vec2( 0, -1));
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vec4 t = p * 0.859375 + sum2 * -0.1171875 + sum1 * -0.09765625;
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return p + t * BLUR;
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}
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