Added Vulkan examples sources!

data/shaders/distancefieldfonts/sdf.frag

@@ -0,0 +1,35 @@
+#version 450
+
+#extension GL_ARB_separate_shader_objects : enable
+#extension GL_ARB_shading_language_420pack : enable
+
+layout (binding = 1) uniform sampler2D samplerColor;
+
+layout (binding = 2) uniform UBO 
+{
+	vec4 outlineColor;
+	float outlineWidth;
+	float outline;
+} ubo;
+
+layout (location = 0) in vec2 inUV;
+
+layout (location = 0) out vec4 outFragColor;
+
+void main() 
+{
+    float distance = texture(samplerColor, inUV).a;
+    float smoothWidth = fwidth(distance);	
+    float alpha = smoothstep(0.5 - smoothWidth, 0.5 + smoothWidth, distance);
+	vec3 rgb = vec3(alpha);
+									 
+	if (ubo.outline > 0.0) 
+	{
+		float w = 1.0 - ubo.outlineWidth;
+		alpha = smoothstep(w - smoothWidth, w + smoothWidth, distance);
+        rgb += mix(vec3(alpha), ubo.outlineColor.rgb, alpha);
+    }									 
+									 
+    outFragColor = vec4(rgb, alpha);	
+	
+}