FlameshadowxeroshinandColby Klein
c1088c1abc
* Distance field EffectMode (supports MSDF and the regular sort)
28 lines
663 B
GLSL
28 lines
663 B
GLSL
uniform sampler2D Texture1;
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varying vec2 texCoords;
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varying vec4 vertexColor;
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float aastep(float threshold, float dist) {
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float afwidth = 0.75 * length(vec2(dFdx(dist), dFdy(dist)));
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return smoothstep(threshold - afwidth, threshold + afwidth, dist);
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}
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float median(float r, float g, float b) {
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return max(min(r, g), min(max(r, g), b));
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}
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const float distanceThreshold = 0.5;
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float sample(vec2 tc) {
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vec3 texel = texture2D(Texture1, tc).rgb;
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float dist = median(texel.r, texel.g, texel.b);
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return aastep(distanceThreshold, dist);
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}
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void main(void)
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{
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float dfValue = sample(texCoords);
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gl_FragColor = vec4(vertexColor.rgb, vertexColor.a * dfValue);
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}
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