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#version 330
in vec2 pass_textureCoords;
out vec4 out_color;
uniform vec3 color;
uniform sampler2D fontAtlas;
const float width = 0.5;
const float edge = 0.1;
const float borderWidth = 0.0;
const float borderEdge = 0.5;
const vec2 offset = vec2(0, 0.0);
const vec3 outlineColour = vec3(1.0,0.0,0.0);
void main(void){
float distance = 1.0 - texture(fontAtlas, pass_textureCoords).a;
float alpha = 1.0 - smoothstep(width, width + edge, distance);
float distance2 = 1.0 - texture(fontAtlas, pass_textureCoords + offset).a;
float outlineAlpha = 1.0 - smoothstep(borderWidth, borderWidth + borderEdge, distance2);
float overallAlpha = alpha + (1.0 - alpha) * outlineAlpha;
vec3 overallColor = mix(outlineColour, color, alpha / overallAlpha);
out_color = vec4(overallColor, overallAlpha);
}
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