bru

h

text_rendering/msdf_c/Readme.md

@@ -0,0 +1,27 @@
+# msdf_c 0.1
+A pure C99 multi-channel signed distance field generator.  Handles MSDF bitmap
+Generation from given ttf/otf font (outlines).
+Single Header STB-style library
+
+---
+
+[This library is my take on improving msdf-c with some fixes and improving its API](https://github.com/solenum/msdf-c)
+
+[Based on the C++ implementation by Viktor Chlumský.](https://github.com/Chlumsky/msdfgen)
+
+~~~
+// example fragment shader
+// scale is render_width/glyph_width
+// render_width being the width of each rendered glyph
+float median(float r, float g, float b) {
+    return max(min(r, g), min(max(r, g), b));
+}
+
+void main()
+{
+  vec3 sample = texture(u_texture, uv).rgb;
+  float dist = scale * (median(sample.r, sample.g, sample.b) - 0.5);
+  float o = clamp(dist + 0.5, 0.0, 1.0);
+  color = vec4(vec3(1.0), o);
+}
+~~~