Created
October 12, 2020 22:13
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| // Created from: https://github.com/hughsk/glsl-dither | |
| // Inspired by: https://www.youtube.com/watch?v=npno7zivwrQ | |
| shader_type canvas_item; | |
| float dither8x8(vec2 position, float brightness) { | |
| int x = int(mod(position.x, 8.0)); | |
| int y = int(mod(position.y, 8.0)); | |
| int index = x + y * 8; | |
| float limit = 0.0; | |
| if (x < 8) { | |
| if (index == 0) limit = 0.015625; | |
| if (index == 1) limit = 0.515625; | |
| if (index == 2) limit = 0.140625; | |
| if (index == 3) limit = 0.640625; | |
| if (index == 4) limit = 0.046875; | |
| if (index == 5) limit = 0.546875; | |
| if (index == 6) limit = 0.171875; | |
| if (index == 7) limit = 0.671875; | |
| if (index == 8) limit = 0.765625; | |
| if (index == 9) limit = 0.265625; | |
| if (index == 10) limit = 0.890625; | |
| if (index == 11) limit = 0.390625; | |
| if (index == 12) limit = 0.796875; | |
| if (index == 13) limit = 0.296875; | |
| if (index == 14) limit = 0.921875; | |
| if (index == 15) limit = 0.421875; | |
| if (index == 16) limit = 0.203125; | |
| if (index == 17) limit = 0.703125; | |
| if (index == 18) limit = 0.078125; | |
| if (index == 19) limit = 0.578125; | |
| if (index == 20) limit = 0.234375; | |
| if (index == 21) limit = 0.734375; | |
| if (index == 22) limit = 0.109375; | |
| if (index == 23) limit = 0.609375; | |
| if (index == 24) limit = 0.953125; | |
| if (index == 25) limit = 0.453125; | |
| if (index == 26) limit = 0.828125; | |
| if (index == 27) limit = 0.328125; | |
| if (index == 28) limit = 0.984375; | |
| if (index == 29) limit = 0.484375; | |
| if (index == 30) limit = 0.859375; | |
| if (index == 31) limit = 0.359375; | |
| if (index == 32) limit = 0.0625; | |
| if (index == 33) limit = 0.5625; | |
| if (index == 34) limit = 0.1875; | |
| if (index == 35) limit = 0.6875; | |
| if (index == 36) limit = 0.03125; | |
| if (index == 37) limit = 0.53125; | |
| if (index == 38) limit = 0.15625; | |
| if (index == 39) limit = 0.65625; | |
| if (index == 40) limit = 0.8125; | |
| if (index == 41) limit = 0.3125; | |
| if (index == 42) limit = 0.9375; | |
| if (index == 43) limit = 0.4375; | |
| if (index == 44) limit = 0.78125; | |
| if (index == 45) limit = 0.28125; | |
| if (index == 46) limit = 0.90625; | |
| if (index == 47) limit = 0.40625; | |
| if (index == 48) limit = 0.25; | |
| if (index == 49) limit = 0.75; | |
| if (index == 50) limit = 0.125; | |
| if (index == 51) limit = 0.625; | |
| if (index == 52) limit = 0.21875; | |
| if (index == 53) limit = 0.71875; | |
| if (index == 54) limit = 0.09375; | |
| if (index == 55) limit = 0.59375; | |
| if (index == 56) limit = 1.0; | |
| if (index == 57) limit = 0.5; | |
| if (index == 58) limit = 0.875; | |
| if (index == 59) limit = 0.375; | |
| if (index == 60) limit = 0.96875; | |
| if (index == 61) limit = 0.46875; | |
| if (index == 62) limit = 0.84375; | |
| if (index == 63) limit = 0.34375; | |
| } | |
| return brightness < limit ? 0.0 : 1.0; | |
| } | |
| void fragment() { | |
| vec4 col = textureLod(SCREEN_TEXTURE, SCREEN_UV, 0.0); | |
| vec3 luminosity = vec3(.299, .587, 0.114); | |
| float luma = dot(col.rgb, luminosity); | |
| COLOR = vec4(vec3(dither8x8(SCREEN_UV * vec2(1024, 500), luma)), 1.0); | |
| } |
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