23 lines
752 B
Text
23 lines
752 B
Text
shader_type canvas_item;
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uniform vec3 line_colour: source_color = vec3(1.0);
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uniform int line_thickness: hint_range(0, 50) = 1;
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uniform sampler2D screen_texture : hint_screen_texture, repeat_disable, filter_nearest;
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void fragment() {
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vec2 size = SCREEN_PIXEL_SIZE * float(line_thickness);
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float line_alpha = 0.0;
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for (float i = -size.x; i <= size.x; i += SCREEN_PIXEL_SIZE.x) {
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for (float j = -size.y; j <= size.y; j += SCREEN_PIXEL_SIZE.y) {
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line_alpha += texture(screen_texture, SCREEN_UV + vec2(i, j)).a;
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}
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}
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vec4 colour = textureLod(screen_texture, SCREEN_UV,0.0);
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if (colour.a > 0.0001) {
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colour.rgb /= colour.a;
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}
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vec4 outline = vec4(line_colour, min(line_alpha, 1.0));
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COLOR *= mix(outline, colour, colour.a);
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}
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