bgfx/tools/texturev/fs_texture_msdf.sc
Бранимир Караџић 466c6a4e95 Happy New Year!
2023-01-14 10:05:12 -08:00

26 lines
645 B
Scala

$input v_texcoord0, v_color0
/*
* Copyright 2011-2023 Branimir Karadzic. All rights reserved.
* License: https://github.com/bkaradzic/bgfx/blob/master/LICENSE
*/
#include "common.sh"
SAMPLER2D(s_texColor, 0);
float median(vec3 _val)
{
return max(min(_val.x, _val.y), min(max(_val.x, _val.y), _val.z) );
}
void main() {
vec4 bgColor = vec4(0.0, 0.0, 0.0, 0.0);
vec4 fgColor = vec4(1.0, 1.0, 1.0, 1.0);
vec3 sample = texture2DLod(s_texColor, v_texcoord0.xy, u_textureLod).xyz;
float sigDist = median(sample) - 0.5;
float opacity = clamp(sigDist/fwidth(sigDist) + 0.5, 0.0, 1.0);
gl_FragColor = mix(bgColor, fgColor, opacity);
}