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example/assets/fonts/gui_world/gui-world-font-df.vp

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+#version 140
+
+// positions are in world space
+in highp vec4 position;
+in mediump vec2 texcoord0;
+in mediump vec4 sdf_params;
+in mediump vec4 face_color;
+in mediump vec4 outline_color;
+in mediump vec4 shadow_color;
+in mediump vec3 layer_mask;
+
+out mediump vec2 var_texcoord0;
+out mediump vec4 var_face_color;
+out mediump vec4 var_outline_color;
+out mediump vec4 var_shadow_color;
+out mediump vec4 var_sdf_params;
+out mediump vec4 var_layer_mask;
+
+uniform vs_uniforms
+{
+    highp mat4 view_proj;
+};
+
+void main()
+{
+    var_texcoord0 = texcoord0;
+    var_face_color = vec4(face_color.xyz * face_color.w, face_color.w);
+    var_outline_color = vec4(outline_color.xyz * outline_color.w, outline_color.w);
+    var_shadow_color = vec4(shadow_color.xyz * shadow_color.w, shadow_color.w);
+    var_sdf_params = sdf_params;
+    var_layer_mask.rgb = layer_mask;
+    var_layer_mask.a = layer_mask.r * layer_mask.g * layer_mask.b;
+    gl_Position = view_proj * vec4(position.x, position.y, position.z, 1.0);
+}