23 lines
821 B
GLSL
23 lines
821 B
GLSL
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precision mediump float;
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varying mediump vec2 v_texcoord;
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uniform sampler2D tex;
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uniform float radius;
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uniform vec2 halfpixel;
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void main() {
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vec2 uv = v_texcoord / 2.0;
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vec4 sum = texture2D(tex, uv + vec2(-halfpixel.x * 2.0, 0.0) * radius);
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sum += texture2D(tex, uv + vec2(-halfpixel.x, halfpixel.y) * radius) * 2.0;
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sum += texture2D(tex, uv + vec2(0.0, halfpixel.y * 2.0) * radius);
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sum += texture2D(tex, uv + vec2(halfpixel.x, halfpixel.y) * radius) * 2.0;
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sum += texture2D(tex, uv + vec2(halfpixel.x * 2.0, 0.0) * radius);
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sum += texture2D(tex, uv + vec2(halfpixel.x, -halfpixel.y) * radius) * 2.0;
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sum += texture2D(tex, uv + vec2(0.0, -halfpixel.y * 2.0) * radius);
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sum += texture2D(tex, uv + vec2(-halfpixel.x, -halfpixel.y) * radius) * 2.0;
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gl_FragColor = sum / 12.0;
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}
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