mirror of
https://github.com/MaSzyna-EU07/maszyna.git
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30 lines
1.0 KiB
GLSL
30 lines
1.0 KiB
GLSL
// one step up the bloom chain: the level below (half as large, with all the levels under it already added) blurred up with
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// a 3x3 tent filter and added to this level of the way down
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in vec2 f_coords;
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layout(location = 0) out vec4 out_color;
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#texture (lower_tex, 0, RGB)
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uniform sampler2D lower_tex;
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#texture (current_tex, 1, RGB)
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uniform sampler2D current_tex;
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void main()
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{
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vec2 texel = 1.0 / vec2(textureSize(lower_tex, 0));
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vec2 uv = f_coords;
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vec3 sum = texture(lower_tex, uv).rgb * 4.0;
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sum += (texture(lower_tex, uv + texel * vec2(0.0, 1.0)).rgb
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+ texture(lower_tex, uv + texel * vec2(-1.0, 0.0)).rgb
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+ texture(lower_tex, uv + texel * vec2(1.0, 0.0)).rgb
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+ texture(lower_tex, uv + texel * vec2(0.0, -1.0)).rgb) * 2.0;
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sum += texture(lower_tex, uv + texel * vec2(-1.0, 1.0)).rgb
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+ texture(lower_tex, uv + texel * vec2(1.0, 1.0)).rgb
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+ texture(lower_tex, uv + texel * vec2(-1.0, -1.0)).rgb
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+ texture(lower_tex, uv + texel * vec2(1.0, -1.0)).rgb;
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out_color = vec4(texture(current_tex, uv).rgb + sum / 16.0, 1.0);
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}
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