mirror of https://github.com/minetest/minetest.git
38 lines
1.5 KiB
GLSL
38 lines
1.5 KiB
GLSL
// based on Phys.Bloom OpenGL tutorial https://learnopengl.com/Guest-Articles/2022/Phys.-Based-Bloom
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// and ACM Siggraph talk in 2014 by Jorge Jimenez for Call of Duty: Advanced Warfare.
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#define rendered texture0
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uniform sampler2D rendered;
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uniform vec2 texelSize0;
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#ifdef GL_ES
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varying mediump vec2 varTexCoord;
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#else
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centroid varying vec2 varTexCoord;
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#endif
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void main(void)
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{
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vec2 tx = 2.0 * texelSize0;
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vec3 a = texture2D(rendered, varTexCoord.st + vec2(-1., -1.) * tx).rgb;
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vec3 b = texture2D(rendered, varTexCoord.st + vec2(0., -1.) * tx).rgb;
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vec3 c = texture2D(rendered, varTexCoord.st + vec2(1., -1.) * tx).rgb;
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vec3 d = texture2D(rendered, varTexCoord.st + vec2(-1., 0.) * tx).rgb;
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vec3 e = texture2D(rendered, varTexCoord.st + vec2(0., 0.) * tx).rgb;
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vec3 f = texture2D(rendered, varTexCoord.st + vec2(1., 0.) * tx).rgb;
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vec3 g = texture2D(rendered, varTexCoord.st + vec2(-1., 1.) * tx).rgb;
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vec3 h = texture2D(rendered, varTexCoord.st + vec2(0., 1.) * tx).rgb;
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vec3 i = texture2D(rendered, varTexCoord.st + vec2(1., 1.) * tx).rgb;
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vec3 j = texture2D(rendered, varTexCoord.st + vec2(-0.5, -0.5) * tx).rgb;
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vec3 k = texture2D(rendered, varTexCoord.st + vec2(0.5, -0.5) * tx).rgb;
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vec3 l = texture2D(rendered, varTexCoord.st + vec2(-0.5, 0.5) * tx).rgb;
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vec3 m = texture2D(rendered, varTexCoord.st + vec2(-0.5, 0.5) * tx).rgb;
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vec3 color =
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(a + c + g + i) * 0.03125 +
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(b + d + f + h) * 0.0625 +
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(e + j + k + l + m) * 0.125;
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gl_FragColor = max(vec4(color, 1.0), 1e-4);
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}
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