ComfyUI/blueprints/Image Blur.json

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     // Blur type (BLUR_GAUSSIAN, BLUR_BOX, BLUR_RADIAL)\nuniform float u_float0;  // Blur radius/amount\n\nin vec2 v_texCoord;\nlayout(location = 0) out vec4 fragColor0;\n\nfloat gaussian(float x, float sigma) {\n    return exp(-(x * x) / (2.0 * sigma * sigma));\n}\n\nvoid main() {\n    vec2 texelSize = 1.0 / u_resolution;\n    float radius = max(u_float0, 0.0);\n    \n    // Radial (angular) blur\n    if (u_int0 == BLUR_RADIAL) {\n        vec2 center = vec2(0.5);\n        vec2 dir = v_texCoord - center;\n        float dist = length(dir);\n        \n        // Avoid division by zero\n        if (dist < 1e-4) {\n            fragColor0 = texture(u_image0, v_texCoord);\n            return;\n        }\n        \n        vec4 sum = vec4(0.0);\n        float totalWeight = 0.0;\n        float angleStep = radius * RADIAL_STRENGTH;\n        \n        dir /= dist;\n        \n        for (int i = -RADIAL_SAMPLES; i <= RADIAL_SAMPLES; i++) {\n            float a = float(i) * angleStep;\n            float s = sin(a);\n            float c = cos(a);\n            vec2 rotatedDir = vec2(\n                dir.x * c - dir.y * s,\n                dir.x * s + dir.y * c\n            );\n            vec2 uv = center + rotatedDir * dist;\n            float w = 1.0 - abs(float(i)) / float(RADIAL_SAMPLES);\n            sum += texture(u_image0, uv) * w;\n            totalWeight += w;\n        }\n        \n        fragColor0 = sum / totalWeight;\n        return;\n    }\n    \n    // Gaussian / Box blur\n    int samples = int(ceil(radius));\n    \n    if (samples == 0) {\n        fragColor0 = texture(u_image0, v_texCoord);\n        return;\n    }\n    \n    vec4 color = vec4(0.0);\n    float totalWeight = 0.0;\n    float sigma = radius / 2.0;\n    \n    for (int x = -samples; x <= samples; x++) {\n        for (int y = -samples; y <= samples; y++) {\n            vec2 offset = vec2(float(x), float(y)) * texelSize;\n            vec4 sample_color = texture(u_image0, v_texCoord + offset);\n            \n            float weight;\n            if (u_int0 == BLUR_GAUSSIAN) {\n                float dist = length(vec2(float(x), float(y)));\n                weight = gaussian(dist, sigma);\n            } else {\n                // BLUR_BOX\n                weight = 1.0;\n            }\n            \n            color += sample_color * weight;\n            totalWeight += weight;\n        }\n    }\n    \n    fragColor0 = color / totalWeight;\n}\n","from_input"]}],"groups":[],"links":[{"id":10,"origin_id":10,"origin_slot":0,"target_id":1,"target_slot":2,"type":"FLOAT"},{"id":11,"origin_id":12,"origin_slot":1,"target_id":1,"target_slot":4,"type":"INT"},{"id":9,"origin_id":-10,"origin_slot":0,"target_id":1,"target_slot":0,"type":"IMAGE"},{"id":3,"origin_id":1,"origin_slot":0,"target_id":-20,"target_slot":0,"type":"IMAGE"}],"extra":{"workflowRendererVersion":"LG"}}]}}