c103383f6f
* Implement SDF font outlines, drop shadows, and image glyphs * Update 11-fontsdf to showcase the SDF outlines, drop shadows, and image glyphs Co-authored-by: Josh Jensen <josh@everrush.com>
33 lines
943 B
Python
33 lines
943 B
Python
$input v_color0, v_color1, v_texcoord0, v_texcoord1
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#include "../../common/common.sh"
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SAMPLERCUBE(s_texColor, 0);
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uniform vec4 u_params;
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#define u_distanceMultiplier u_params.y
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#define u_outlineWidth u_params.w
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void main()
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{
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vec4 color = textureCube(s_texColor, v_texcoord0.xyz);
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int index = int(v_texcoord0.w*4.0 + 0.5);
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float rgba[4];
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rgba[0] = color.z;
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rgba[1] = color.y;
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rgba[2] = color.x;
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rgba[3] = color.w;
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float distance = rgba[index];
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float smoothing = 16.0 * length(fwidth(v_texcoord0.xyz)) / sqrt(2.0) * u_distanceMultiplier;
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float outlineWidth = u_outlineWidth * smoothing;
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float outerEdgeCenter = 0.5 - outlineWidth;
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float alpha = smoothstep(outerEdgeCenter - smoothing, outerEdgeCenter + smoothing, distance);
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float border = smoothstep(0.5 - smoothing, 0.5 + smoothing, distance);
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vec4 sdfColor = vec4( mix(v_color1.xyz, v_color0.xyz, border), alpha * v_color0.w );
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gl_FragColor = sdfColor;
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}
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