More widgets stuff, cleaning code

druid/materials/stencil/gui_stencil.fp

@@ -0,0 +1,18 @@
+#version 140
+
+uniform sampler2D texture_sampler;
+
+in vec2 var_texcoord0;
+in vec4 var_color;
+
+out vec4 color_out;
+
+void main() {
+	lowp vec4 tex = texture(texture_sampler, var_texcoord0.xy);
+	if (tex.a < 0.5) {
+		discard;
+	}
+
+	// Final color of stencil texture
+	color_out = tex * var_color;
+}