22 lines
902 B
GLSL
22 lines
902 B
GLSL
#version 120
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uniform sampler2D DiffuseSampler;
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varying vec2 texCoord;
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varying vec2 oneTexel;
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void main(){
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vec4 center = texture2D(DiffuseSampler, texCoord);
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vec4 left = texture2D(DiffuseSampler, texCoord - vec2(oneTexel.x, 0.0));
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vec4 right = texture2D(DiffuseSampler, texCoord + vec2(oneTexel.x, 0.0));
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vec4 up = texture2D(DiffuseSampler, texCoord - vec2(0.0, oneTexel.y));
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vec4 down = texture2D(DiffuseSampler, texCoord + vec2(0.0, oneTexel.y));
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float leftDiff = abs(center.a - left.a);
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float rightDiff = abs(center.a - right.a);
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float upDiff = abs(center.a - up.a);
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float downDiff = abs(center.a - down.a);
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float total = clamp(leftDiff + rightDiff + upDiff + downDiff, 0.0, 1.0);
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vec3 outColor = center.rgb * center.a + left.rgb * left.a + right.rgb * right.a + up.rgb * up.a + down.rgb * down.a;
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gl_FragColor = vec4(outColor * 0.2, total);
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}
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