27 lines
915 B
GLSL
27 lines
915 B
GLSL
#version 300 es
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precision highp float;
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uniform sampler2D u_image0;
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uniform float u_float0; // strength [0.0 – 2.0] typical: 0.3–1.0
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in vec2 v_texCoord;
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layout(location = 0) out vec4 fragColor0;
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void main() {
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vec2 texel = 1.0 / vec2(textureSize(u_image0, 0));
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// Sample center and neighbors
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vec4 center = texture(u_image0, v_texCoord);
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vec4 top = texture(u_image0, v_texCoord + vec2( 0.0, -texel.y));
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vec4 bottom = texture(u_image0, v_texCoord + vec2( 0.0, texel.y));
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vec4 left = texture(u_image0, v_texCoord + vec2(-texel.x, 0.0));
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vec4 right = texture(u_image0, v_texCoord + vec2( texel.x, 0.0));
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// Edge enhancement (Laplacian)
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vec4 edges = center * 4.0 - top - bottom - left - right;
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// Add edges back scaled by strength
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vec4 sharpened = center + edges * u_float0;
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fragColor0 = vec4(clamp(sharpened.rgb, 0.0, 1.0), center.a);
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} |