37 lines
1.1 KiB
GLSL
Executable file
37 lines
1.1 KiB
GLSL
Executable file
shader_type canvas_item;
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render_mode blend_premul_alpha;
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uniform float radius = 5.0;
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uniform float amount = 0.25;
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void fragment() {
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float r = radius;
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vec2 ps = TEXTURE_PIXEL_SIZE;
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vec4 col = texture(TEXTURE, UV);
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vec4 glow = col;
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glow += texture(TEXTURE, UV + vec2(-r, -r) * ps);
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glow += texture(TEXTURE, UV + vec2(-r, 0.0) * ps);
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glow += texture(TEXTURE, UV + vec2(-r, r) * ps);
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glow += texture(TEXTURE, UV + vec2(0.0, -r) * ps);
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glow += texture(TEXTURE, UV + vec2(0.0, r) * ps);
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glow += texture(TEXTURE, UV + vec2(r, -r) * ps);
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glow += texture(TEXTURE, UV + vec2(r, 0.0) * ps);
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glow += texture(TEXTURE, UV + vec2(r, r) * ps);
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r *= 2.0;
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glow += texture(TEXTURE, UV + vec2(-r, -r) * ps);
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glow += texture(TEXTURE, UV + vec2(-r, 0.0) * ps);
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glow += texture(TEXTURE, UV + vec2(-r, r) * ps);
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glow += texture(TEXTURE, UV + vec2(0.0, -r) * ps);
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glow += texture(TEXTURE, UV + vec2(0.0, r) * ps);
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glow += texture(TEXTURE, UV + vec2(r, -r) * ps);
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glow += texture(TEXTURE, UV + vec2(r, 0.0) * ps);
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glow += texture(TEXTURE, UV + vec2(r, r) * ps);
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glow /= 17.0;
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glow *= amount;
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col.rgb *= col.a;
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COLOR = glow + col;
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}
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