mirror of
https://gitlab.com/MaddoScientisto/cirnogodot.git
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29 lines
No EOL
1,000 B
Text
29 lines
No EOL
1,000 B
Text
//SHADER ORIGINALY CREADED BY "Nihilistic_Furry" FROM SHADERTOY
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//MODIFIED AND PORTED TO GODOT BY AHOPNESS (@ahopness)
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//LICENSE : CC0
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//COMATIBLE WITH : GLES2, GLES3, WEBGL
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//SHADERTOY LINK : https://www.shadertoy.com/view/wsK3Wt
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shader_type canvas_item;
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uniform sampler2D SCREEN_TEXTURE : hint_screen_texture, filter_linear_mipmap;
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uniform float sharpen_amount :hint_range(0,4) = 1.0;
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vec4 sharpenMask (sampler2D st, vec2 fc, vec2 sps){
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// Sharpen detection matrix [0,1,0],[1,-4,1],[0,1,0]
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// Colors
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vec4 up = texture (st, (fc + vec2 (0, 1))/sps);
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vec4 left = texture (st, (fc + vec2 (-1, 0))/sps);
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vec4 center = texture (st, fc/sps);
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vec4 right = texture (st, (fc + vec2 (1, 0))/sps);
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vec4 down = texture (st, (fc + vec2 (0, -1))/sps);
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// Return edge detection
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return (1.0 + 4.0*sharpen_amount)*center -sharpen_amount*(up + left + right + down);
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}
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void fragment(){
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// Detect edges and output to screen
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COLOR = sharpenMask (SCREEN_TEXTURE, FRAGCOORD.xy, 1.0 / SCREEN_PIXEL_SIZE);
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} |