34 lines
770 B
GLSL
34 lines
770 B
GLSL
#version 330
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in vec2 pass_textureCoords;
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out vec4 out_colour;
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uniform vec3 colour;
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uniform sampler2D fontAtlas;
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const float width = 0;
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const float edge = 1.0;
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uniform float borderWidth;
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uniform float borderEdge;
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uniform vec2 offset;
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uniform vec3 outlineColour;
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void main(void){
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float distance = 1.0 - texture(fontAtlas, pass_textureCoords).a;
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float alpha = 1.0 - smoothstep(width, width + edge, distance);
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float distance2 = 1.0 - texture(fontAtlas, pass_textureCoords + offset).a;
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float outlineAlpha = 1.0 - smoothstep(borderWidth, borderWidth + borderEdge, distance2);
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float overallAlpha = alpha + (1.0 - alpha) * outlineAlpha;
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vec3 overallColour = mix(outlineColour, colour, alpha / overallAlpha);
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out_colour = vec4(overallColour, overallAlpha);
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}
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